:root {
  --bg: #05070f;
  --bg-soft: rgba(9, 14, 26, 0.85);
  --card: rgba(15, 24, 42, 0.78);
  --stroke: rgba(255, 255, 255, 0.12);
  --stroke-strong: rgba(255, 255, 255, 0.2);
  --text: #eff2ff;
  --muted: #a6b0c4;
  --accent: #f7d154;
  --accent-2: #5cc5ff;
  --accent-3: #7a70ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Urbanist", sans-serif;
  color: var(--text);
  background:
    radial-gradient(90% 120% at 12% 10%, rgba(0, 173, 216, 0.18) 0%, rgba(0, 173, 216, 0) 45%),
    radial-gradient(100% 120% at 80% 5%, rgba(255, 221, 87, 0.18) 0%, rgba(255, 221, 87, 0) 40%),
    radial-gradient(100% 120% at 40% 80%, rgba(122, 112, 255, 0.2) 0%, rgba(122, 112, 255, 0) 50%),
    var(--bg);
  overflow-x: hidden;
  font-size: 17px;
  line-height: 1.7;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.18) 1px, transparent 1px),
    radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 140px 140px, 220px 220px;
  background-position: 0 0, 60px 80px;
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: "";
  position: fixed;
  inset: -20% -10% auto -10%;
  height: 60vh;
  background: radial-gradient(60% 60% at 50% 50%, rgba(255, 255, 255, 0.08), transparent 70%);
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

.orb {
  position: fixed;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(0);
  opacity: 0.55;
  z-index: 0;
  pointer-events: none;
}

.orb-1 {
  top: -120px;
  right: -120px;
  background: radial-gradient(circle, rgba(255, 221, 87, 0.4), transparent 70%);
}

.orb-2 {
  bottom: -120px;
  left: -100px;
  background: radial-gradient(circle, rgba(92, 197, 255, 0.35), transparent 70%);
}

.orb-3 {
  top: 35%;
  right: 15%;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(122, 112, 255, 0.35), transparent 70%);
}

/* Canvas starfield replaces old shooting-star spans */
#starfield {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.container {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(6, 10, 20, 0.8);
  border-bottom: 1px solid var(--stroke);
  backdrop-filter: blur(12px);
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
  /* Prevent nav-actions from being clipped on small screens */
  overflow: visible;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 12px rgba(92, 197, 255, 0.6);
}

.brand-pill {
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--stroke);
  color: var(--text);
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
  font-size: 17px;
  transition: color 0.2s ease;
  position: relative;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a.active {
  color: var(--accent);
  font-weight: 600;
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Grouped social icons in nav — match reference image */
.nav-social-group {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--stroke);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  padding: 3px;
  overflow: hidden;
}

.nav-social-group .icon-button {
  border: none;
  background: transparent;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-social-group .icon-button:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-2);
  transform: none;
  box-shadow: none;
}

.icon-button {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--stroke);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.04);
}

.nav-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  display: none;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-direction: column;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* Hide native scrollbar — custom vertical progress bar is used instead */
html {
  scrollbar-width: none; /* Firefox */
}
html::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Edge */
}

.hero {
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--stroke);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  width: 100%;
  min-width: 0;
}

/* Left column — constrained to match right column card width */
.hero-copy {
  max-width: 480px;
  justify-self: end;
  width: 100%;
  min-width: 0; /* prevent grid cell from blowing out on small screens */
}

.eyebrow {
  font-size: 13px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.eyebrow-bar {
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--accent);
  border-radius: 2px;
  flex-shrink: 0;
}

h1,
h2,
h3 {
  font-family: "Space Grotesk", sans-serif;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.6rem, 4vw, 3.4rem);
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 35%, var(--accent-2) 65%, var(--text) 100%);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 8s ease infinite;
}

h1 span {
  display: block;
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
  color: var(--accent);
  margin-top: 8px;
  background: linear-gradient(90deg, var(--accent-2) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.lead {
  font-size: 17px;
  color: var(--muted);
  line-height: 1.75;
  max-width: 520px;
  letter-spacing: 0.2px;
  margin: 0 0 4px;
}

.cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin: 20px 0 0;
}

.cta-group .btn {
  position: relative;
  overflow: hidden;
}

.cta-group .btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  transition: left 0.3s ease;
}

.cta-group .btn:hover::before {
  left: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 2px solid transparent;
  transition: all 0.3s ease;
  font-size: 15px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255,255,255,0.2) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.btn:hover::before {
  opacity: 1;
}

.btn.primary {
  background: var(--accent);
  color: #0b0f1c;
  box-shadow: 0 12px 32px rgba(247, 209, 84, 0.35);
  border-color: var(--accent);
}

.btn.primary:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 20px 48px rgba(247, 209, 84, 0.5);
}

.btn.primary:active {
  transform: translateY(-1px) scale(1.02);
}

.btn.ghost {
  border-color: var(--stroke-strong);
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.btn.ghost:hover {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(92, 197, 255, 0.2), inset 0 0 0 1px rgba(92, 197, 255, 0.1);
  color: var(--accent);
}

.btn.ghost:active {
  transform: translateY(0);
}

.btn.small {
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 600;
  gap: 6px;
}

.code-card {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--card);
  border: 1px solid var(--stroke);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
  /* Prevent overflow on small screens */
  max-width: 100%;
  overflow: hidden;
  min-width: 0;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
}

.code-header .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
}

.code-title {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.code-card code {
  display: block;
}

.code-line {
  display: block;
  opacity: 0;
  transform: translateY(6px);
  animation: codeLineIn 0.6s ease forwards;
  white-space: pre;
  color: #d6d9e8;
}

.code-line.keyword {
  color: #569cd6;
}

.code-line.function {
  color: #d4d4d4;
}

.code-line.string {
  color: #ce9178;
}

.code-line.param {
  color: #9cdcfe;
}

pre {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: #d6d9e8;
  font-family: "Space Grotesk", monospace;
  overflow-x: auto;
  max-width: 100%;
  white-space: pre;
}

/* Stats base styles — used inside .profile-card */
.stats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.stat-card {
  padding: 12px 8px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--stroke);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
  text-align: center;
}

.stat-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(92, 197, 255, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-card:hover {
  border-color: var(--accent-2);
  background: rgba(92, 197, 255, 0.08);
  box-shadow: 0 8px 20px rgba(92, 197, 255, 0.2);
  transform: translateY(-4px);
}

.stat-number {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 4px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  margin: 0;
  font-size: 11px;
  color: var(--muted);
  font-weight: 500;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.profile-card {
  width: 100%;
  max-width: 360px;
  padding: 32px 24px 28px;
  border-radius: 0;
  background: transparent;
  border: none;
  text-align: center;
  box-shadow: none;
  position: relative;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  /* No floatCard animation — only avatar moves */
  animation: none;
}

.profile-card::before {
  display: none;
}

/* Avatar ring */
.avatar-ring {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  padding: 0;
  background: transparent;
  border: 2px solid rgba(92, 197, 255, 0.35);
  box-shadow:
    0 0 0 6px rgba(92, 197, 255, 0.08),
    0 0 32px rgba(92, 197, 255, 0.45),
    0 0 72px rgba(92, 197, 255, 0.2),
    0 0 120px rgba(92, 197, 255, 0.08);
  animation: floatAvatar 4s ease-in-out infinite;
  flex-shrink: 0;
  margin-bottom: 20px;
  overflow: hidden;
}

.avatar-ring img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: none;
  display: block;
  transition: transform 0.3s ease;
  background: transparent;
}

.avatar-ring img:hover {
  transform: scale(1.04);
}

.profile-info h2 {
  margin: 0 0 8px;
  font-size: 24px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: -0.3px;
  line-height: 1.3;
}

.profile-info p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 16px;
  letter-spacing: 0.2px;
}

.profile-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  width: 100%;
  flex-wrap: nowrap;
}

/* Icon-only circular buttons in profile card */
.profile-icon-btn {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.07);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: all 0.25s ease;
  flex-shrink: 0;
}

.profile-icon-btn:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  background: rgba(92, 197, 255, 0.14);
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(92, 197, 255, 0.3);
}

/* LinkedIn brand color on hover */
.profile-icon-btn[aria-label="LinkedIn"]:hover {
  border-color: #0a66c2;
  color: #0a66c2;
  background: rgba(10, 102, 194, 0.14);
  box-shadow: 0 6px 18px rgba(10, 102, 194, 0.3);
}

/* GitHub brand color on hover */
.profile-icon-btn[aria-label="GitHub"]:hover {
  border-color: #e6edf3;
  color: #e6edf3;
  background: rgba(230, 237, 243, 0.1);
  box-shadow: 0 6px 18px rgba(230, 237, 243, 0.15);
}

/* Facebook brand color on hover */
.profile-icon-btn[aria-label="Facebook"]:hover {
  border-color: #1877f2;
  color: #1877f2;
  background: rgba(24, 119, 242, 0.14);
  box-shadow: 0 6px 18px rgba(24, 119, 242, 0.3);
}

/* Email accent on hover */
.profile-icon-btn[aria-label="Send email"]:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(247, 209, 84, 0.14);
  box-shadow: 0 6px 18px rgba(247, 209, 84, 0.3);
}

/* Stats inside right column */
.profile-card .stats {
  display: flex;
  gap: 10px;
  width: 100%;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 0;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.profile-card .stat-card {
  flex: 1;
  min-width: 72px;
  padding: 12px 8px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.profile-card .stat-number {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 4px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.profile-card .stat-label {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

.section {
  padding: 100px 0;
}

.section-title {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: clamp(2.2rem, 3.2vw, 3rem);
  margin-bottom: 16px;
}

.section-title p {
  color: var(--muted);
  line-height: 1.8;
  font-size: 17px;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}

.about-card {
  padding: 28px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
}

.about-card h3 {
  font-size: 18px;
  margin-bottom: 16px;
}

.about-card ul {
  padding-left: 16px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.about-card li {
  margin-bottom: 14px;
  line-height: 1.6;
}

.about-tabs {
  margin-top: 40px;
}

.about-tabs-nav {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--stroke);
  padding-bottom: 0;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 18px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
}

.tab-btn:hover {
  color: var(--text);
}

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.about-content {
  animation: fadeIn 0.3s ease;
}

.tab-content {
  display: none;
  animation: fadeIn 0.4s ease forwards;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.4s ease forwards;
}

.lead-text {
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 32px;
  max-width: 800px;
}

.education-list,
.certificates-list,
.testimonials-list {
  display: grid;
  gap: 24px;
}

.education-item,
.cert-item,
.testimonial-item {
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  transition: all 0.3s ease;
}

.education-item:hover,
.cert-item:hover,
.testimonial-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: var(--stroke-strong);
  transform: translateY(-2px);
}

.education-header,
.cert-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.education-header h3,
.cert-header h3 {
  font-size: 18px;
  color: var(--accent);
  margin: 0;
}

.education-header .time,
.cert-header .cert-status {
  font-size: 13px;
  color: var(--accent-2);
  font-weight: 600;
  white-space: nowrap;
  background: rgba(92, 197, 255, 0.1);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(92, 197, 255, 0.2);
}

.cert-header .cert-status {
  background: rgba(247, 209, 84, 0.1);
  color: var(--accent);
  border-color: rgba(247, 209, 84, 0.2);
}

.time,
.cert-status {
  font-size: 13px;
  color: var(--accent-2);
  font-weight: 600;
  white-space: nowrap;
  background: rgba(92, 197, 255, 0.1);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(92, 197, 255, 0.2);
}

.cert-status {
  background: rgba(247, 209, 84, 0.1);
  color: var(--accent);
  border-color: rgba(247, 209, 84, 0.2);
}

.timeline-item .time {
  font-weight: 700;
  color: var(--accent);
  font-size: 15px;
  background: none !important;
  padding: 0 !important;
  border: none !important;
  border-radius: 0 !important;
}

.education-major,
.education-role {
  font-size: 16px;
  color: var(--text);
  font-weight: 600;
  margin: 8px 0;
}

.education-gpa {
  font-size: 14px;
  color: var(--accent-2);
  margin: 4px 0 12px;
}

.education-desc,
.cert-desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  margin: 12px 0 0;
}

.cert-link {
  display: inline-block;
  margin-top: 12px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: all 0.2s ease;
}

.cert-link:hover {
  color: var(--accent-2);
  transform: translateX(4px);
}

.testimonial-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
  font-style: italic;
  margin: 0 0 16px;
}

.testimonial-author {
  display: block;
}

.testimonial-author strong {
  display: block;
  color: var(--text);
  font-size: 16px;
  margin-bottom: 4px;
}

.author-title {
  font-size: 13px;
  color: var(--accent-2);
  font-weight: 500;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.project-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 12px;
}

.project-toolbar input {
  flex: 1 1 260px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  outline: none;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-btn {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  cursor: pointer;
  font-weight: 600;
}

.filter-btn.active {
  background: var(--accent);
  color: #0b0f1c;
  border-color: transparent;
}

.project-count {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 8px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
  margin-top: 24px;
}

.project-card {
  padding: 28px;
  border-radius: 18px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.project-card h3 {
  font-size: 19px;
  margin-bottom: 4px;
}

.project-card p {
  font-size: 15px;
  line-height: 1.6;
}

.project-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.project-head a {
  text-decoration: none;
  color: var(--accent-2);
  font-weight: 600;
}

.project-sub {
  color: var(--accent);
  font-weight: 600;
  margin: 0;
  font-size: 16px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list span,
.chip-list span {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.03);
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
}

.project-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.skill-card {
  padding: 26px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
}

.skill-card h3 {
  font-size: 18px;
  margin-bottom: 16px;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.timeline {
  display: grid;
  gap: 20px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 24px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
}

.timeline-item .time {
  font-weight: 700;
  color: var(--accent);
  font-size: 15px;
}

.timeline-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.timeline-item p {
  font-size: 16px;
  line-height: 1.6;
}

.contact-card {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  padding: 32px;
  border-radius: 20px;
  border: 1px solid var(--stroke);
  background: rgba(10, 18, 35, 0.75);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.contact-card:hover {
  background: rgba(10, 18, 35, 0.9);
  border-color: var(--accent);
  box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(247, 209, 84, 0.1);
  transform: translateY(-4px);
}

.contact-details {
  display: grid;
  gap: 14px;
  color: var(--muted);
}

.contact-details a {
  color: var(--text);
  text-decoration: none;
  font-size: 16px;
  transition: all 0.3s ease;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  display: inline-block;
}

.contact-details a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  transform: translateX(4px);
}

.contact-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip-list span {
  padding: 8px 14px;
  border-radius: 20px;
  background: rgba(92, 197, 255, 0.1);
  border: 1px solid rgba(92, 197, 255, 0.2);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-2);
  transition: all 0.3s ease;
  cursor: default;
}

.chip-list span:hover {
  background: rgba(92, 197, 255, 0.2);
  border-color: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(92, 197, 255, 0.2);
}

.site-footer {
  padding: 40px 0 60px;
  color: var(--muted);
  text-align: center;
  font-size: 15px;
}

@keyframes glowPulse {
  0%, 100% {
    opacity: 0.7;
    filter: blur(8px);
  }
  50% {
    opacity: 1;
    filter: blur(12px);
  }
}

@keyframes floatCard {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
  100% {
    transform: translateY(0);
  }
}

@keyframes floatAvatar {
  0% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-22px) scale(1.03);
  }
  100% {
    transform: translateY(0) scale(1);
  }
}

@keyframes codeLineIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes progressFill {
  from {
    width: 0%;
  }
  to {
    width: var(--progress, 100%);
  }
}

/* Scroll Animation Trigger Classes */
/* Hero is always visible — only non-hero sections fade in on scroll */
.section {
  opacity: 1;
}

.section:not(#home) {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.section:not(#home).in-view {
  opacity: 1;
  transform: translateY(0);
}

.section.animate-in {
  opacity: 1;
  transform: translateY(0);
}

.stat-card {
  animation: scaleIn 0.6s ease forwards;
  animation-fill-mode: both;
}

.stat-card:nth-child(1) { animation-delay: 0s; }
.stat-card:nth-child(2) { animation-delay: 0.15s; }
.stat-card:nth-child(3) { animation-delay: 0.3s; }

.project-card {
  animation: slideInUp 0.6s ease forwards;
  animation-fill-mode: both;
}

.project-card:nth-child(1) { animation-delay: 0s; }
.project-card:nth-child(2) { animation-delay: 0.15s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }

.skill-card {
  animation: slideInUp 0.6s ease forwards;
  animation-fill-mode: both;
}

.skill-card:nth-child(1) { animation-delay: 0s; }
.skill-card:nth-child(2) { animation-delay: 0.15s; }
.skill-card:nth-child(3) { animation-delay: 0.3s; }
.skill-card:nth-child(4) { animation-delay: 0.45s; }

.timeline-item {
  animation: slideInLeft 0.6s ease forwards;
  animation-fill-mode: both;
}

.timeline-item:nth-child(1) { animation-delay: 0s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }

.education-item,
.cert-item,
.testimonial-item {
  animation: slideInUp 0.6s ease forwards;
  animation-fill-mode: both;
}

.education-item:nth-child(1),
.cert-item:nth-child(1),
.testimonial-item:nth-child(1) { animation-delay: 0s; }

.education-item:nth-child(2),
.cert-item:nth-child(2),
.testimonial-item:nth-child(2) { animation-delay: 0.15s; }

.education-item:nth-child(3),
.cert-item:nth-child(3),
.testimonial-item:nth-child(3) { animation-delay: 0.3s; }

.contact-details {
  animation: slideInRight 0.8s ease forwards;
}

/* Icon hover animations */
.icon-button {
  transition: all 0.3s ease;
  position: relative;
}

.icon-button::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(92, 197, 255, 0.3) 0%, transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.icon-button:hover::before {
  opacity: 1;
  animation: scaleOut 0.6s ease forwards;
}

.icon-button:hover {
  border-color: var(--accent-2);
  color: var(--accent-2);
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(92, 197, 255, 0.4);
}

@keyframes scaleOut {
  from {
    transform: scale(1);
    opacity: 1;
  }
  to {
    transform: scale(1.5);
    opacity: 0;
  }
}

/* Profile card — transparent, no hover lift */
.profile-card {
  transition: none;
}

.profile-card:hover {
  transform: none;
  background: transparent;
  border-color: transparent;
}

/* Enhanced card hover effects */
.about-card,
.education-item,
.cert-item,
.testimonial-item,
.project-card,
.skill-card {
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.about-card:hover,
.education-item:hover,
.cert-item:hover,
.testimonial-item:hover,
.project-card:hover,
.skill-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), 0 0 20px rgba(92, 197, 255, 0.1);
}

.project-card:hover {
  border-color: var(--accent-2);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), 0 0 30px rgba(92, 197, 255, 0.2);
}

/* Smooth focus states for accessibility */
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .profile-card,
  .avatar-ring img,
  .code-line,
  .section,
  .stat-card,
  .project-card,
  .skill-card,
  .timeline-item,
  .education-item,
  .cert-item,
  .testimonial-item,
  .contact-details {
    animation: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}

@media (max-width: 980px) {
  .hero {
    padding: 56px 0 48px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    align-items: center;
  }

  .hero-copy {
    max-width: 100%;
    justify-self: auto;
  }

  .hero-visual {
    order: -1;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }
  
  .about-tabs-nav {
    gap: 12px;
  }
  
  .tab-btn {
    padding: 10px 16px;
    font-size: 15px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }

  .contact-card {
    grid-template-columns: 1fr;
  }
  
  .cta-group {
    width: 100%;
  }
  
  .cta-group .btn {
    flex: 1;
    min-width: 140px;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    padding: 24px;
    background: rgba(6, 10, 20, 0.95);
    flex-direction: column;
    transform: translateY(-120%);
    transition: transform 0.2s ease;
  }

  body.nav-open .nav-links {
    transform: translateY(0);
  }

  .nav-toggle {
    display: inline-flex;
  }

  /* Tighten nav-actions on mobile so toggle is never clipped */
  .nav-actions {
    gap: 6px;
    flex-shrink: 0;
  }

  .nav-social-group .icon-button {
    width: 28px;
    height: 28px;
  }

  .nav-social-group {
    padding: 2px;
    gap: 0;
  }

  .theme-toggle {
    width: 32px;
    height: 32px;
  }

  .nav-bar {
    gap: 8px;
    padding: 0 4px;
  }

  /* Prevent code card from overflowing viewport */
  .code-card {
    padding: 12px 14px;
  }

  pre {
    font-size: 11px;
    line-height: 1.6;
  }

  .code-line {
    white-space: pre;
  }
  
  .profile-card {
    width: 100%;
    max-width: 340px;
  }

  .avatar-ring {
    width: 130px;
    height: 130px;
  }
  
  .profile-info h2 {
    font-size: 18px;
  }
  
  .profile-actions {
    flex-wrap: wrap;
  }
  
  .profile-actions .btn {
    flex: 1;
    min-width: 100px;
  }
  
  .cta-group {
    flex-direction: column;
  }
  
  .cta-group .btn {
    width: 100%;
  }
  
  .about-tabs-nav {
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
  }
  
  .tab-btn {
    padding: 8px 14px;
    font-size: 14px;
  }
  
  .education-item,
  .cert-item,
  .testimonial-item {
    padding: 20px;
  }
  
  .education-header,
  .cert-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .time,
  .cert-status {
    align-self: flex-start;
  }
}

/* ============================================================
   LIGHT MODE
   ============================================================ */
body.light-mode {
  --bg: #f0f2f8;
  --bg-soft: rgba(240, 242, 248, 0.92);
  --card: rgba(255, 255, 255, 0.85);
  --stroke: rgba(0, 0, 0, 0.1);
  --stroke-strong: rgba(0, 0, 0, 0.18);
  --text: #0d1120;
  --muted: #4a5270;
  --accent: #d4a800;
  --accent-2: #0090cc;
  --accent-3: #5a50e0;
}

body.light-mode {
  background:
    radial-gradient(90% 120% at 12% 10%, rgba(0, 144, 204, 0.1) 0%, rgba(0, 144, 204, 0) 45%),
    radial-gradient(100% 120% at 80% 5%, rgba(212, 168, 0, 0.1) 0%, rgba(212, 168, 0, 0) 40%),
    radial-gradient(100% 120% at 40% 80%, rgba(90, 80, 224, 0.1) 0%, rgba(90, 80, 224, 0) 50%),
    var(--bg);
}

body.light-mode::before {
  background-image:
    radial-gradient(rgba(0, 0, 0, 0.08) 1px, transparent 1px),
    radial-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px);
  opacity: 0.5;
}

body.light-mode::after {
  background: radial-gradient(60% 60% at 50% 50%, rgba(0, 0, 0, 0.04), transparent 70%);
}

body.light-mode .site-header {
  background: rgba(240, 242, 248, 0.88);
  border-bottom-color: var(--stroke);
}

body.light-mode .hero {
  border-bottom-color: var(--stroke);
}

body.light-mode .orb-1 {
  background: radial-gradient(circle, rgba(212, 168, 0, 0.2), transparent 70%);
}
body.light-mode .orb-2 {
  background: radial-gradient(circle, rgba(0, 144, 204, 0.18), transparent 70%);
}
body.light-mode .orb-3 {
  background: radial-gradient(circle, rgba(90, 80, 224, 0.18), transparent 70%);
}

body.light-mode .code-card {
  background: rgba(255, 255, 255, 0.9);
  border-color: var(--stroke);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

body.light-mode pre,
body.light-mode .code-line {
  color: #2d3561;
}

body.light-mode .code-line.keyword { color: #0550ae; }
body.light-mode .code-line.string  { color: #953800; }
body.light-mode .code-line.param   { color: #0a3069; }

body.light-mode .profile-card {
  background: transparent;
  border-color: transparent;
  box-shadow: none;
}

body.light-mode .avatar-ring {
  border-color: rgba(0, 144, 204, 0.4);
  box-shadow:
    0 0 0 6px rgba(0, 144, 204, 0.06),
    0 0 28px rgba(0, 144, 204, 0.35),
    0 0 60px rgba(0, 144, 204, 0.15);
}

body.light-mode .profile-icon-btn {
  border-color: rgba(0, 0, 0, 0.12);
  background: rgba(0, 0, 0, 0.05);
  color: rgba(0, 0, 0, 0.6);
}

body.light-mode .profile-card .stats {
  border-top-color: rgba(0, 0, 0, 0.08);
}

body.light-mode .profile-card .stat-card {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.08);
}

body.light-mode h1 {
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 35%, var(--accent-2) 65%, var(--text) 100%);
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
}

body.light-mode .btn.ghost {
  color: var(--text);
  border-color: var(--stroke-strong);
}

body.light-mode .btn.ghost:hover {
  color: var(--accent-2);
}

body.light-mode .nav-links a {
  color: var(--muted);
}

body.light-mode .nav-links a:hover,
body.light-mode .nav-links a.active {
  color: var(--accent);
}

body.light-mode .about-card,
body.light-mode .education-item,
body.light-mode .cert-item,
body.light-mode .testimonial-item,
body.light-mode .project-card,
body.light-mode .skill-card,
body.light-mode .timeline-item,
body.light-mode .stat-card {
  background: rgba(255, 255, 255, 0.7);
  border-color: var(--stroke);
}

body.light-mode .contact-card {
  background: rgba(255, 255, 255, 0.8);
}

body.light-mode .filter-btn {
  background: rgba(0, 0, 0, 0.04);
  color: var(--muted);
}

body.light-mode .filter-btn.active {
  background: var(--accent);
  color: #fff;
}

body.light-mode .project-toolbar input {
  background: rgba(255, 255, 255, 0.8);
  color: var(--text);
  border-color: var(--stroke);
}

body.light-mode .chip-list span {
  background: rgba(0, 144, 204, 0.08);
  border-color: rgba(0, 144, 204, 0.2);
  color: var(--accent-2);
}

body.light-mode .scroll-progress-vertical {
  background: linear-gradient(to bottom, var(--accent-3), var(--accent-2));
}

body.light-mode .back-to-top {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
}

/* ============================================================
   THEME TOGGLE BUTTON
   ============================================================ */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(20deg) scale(1.1);
  box-shadow: 0 0 16px rgba(247, 209, 84, 0.3);
}

.theme-icon-moon,
.theme-icon-sun {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.theme-icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

body.light-mode .theme-icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

body.light-mode .theme-icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ============================================================
   VERTICAL SCROLL PROGRESS (right side)
   ============================================================ */
.scroll-progress-vertical {
  position: fixed;
  top: 0;
  right: 0;
  width: 3px;
  height: 0%;
  background: linear-gradient(to bottom, var(--accent-3), var(--accent-2));
  z-index: 100;
  border-radius: 0 0 3px 3px;
  transition: height 0.05s linear;
  box-shadow: -1px 0 12px rgba(122, 112, 255, 0.4);
}

/* ============================================================
   BACK TO TOP BUTTON
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #0b0f1c;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 99;
  opacity: 0;
  transform: translateY(20px) scale(0.8);
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
  pointer-events: none;
  box-shadow: 0 8px 24px rgba(92, 197, 255, 0.35);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.back-to-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 16px 36px rgba(92, 197, 255, 0.5);
}

.back-to-top:active {
  transform: translateY(-2px) scale(1.05);
}

/* ============================================================
   CTA BUTTON ARROW ANIMATION
   ============================================================ */
.btn-arrow {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  margin-left: 2px;
}

.btn:hover .btn-arrow {
  transform: translateX(5px);
}

/* ============================================================
   SKILL PROGRESS BARS
   ============================================================ */
.skill-bars {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.skill-bar-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.skill-bar-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.skill-pct {
  color: var(--accent-2);
  font-size: 13px;
  font-weight: 700;
  font-family: "Space Grotesk", monospace;
}

.skill-bar-track {
  width: 100%;
  height: 7px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--stroke);
}

body.light-mode .skill-bar-track {
  background: rgba(0, 0, 0, 0.06);
}

.skill-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-2) 0%, var(--accent) 100%);
  box-shadow: 0 0 10px rgba(92, 197, 255, 0.4);
  transition: width 1.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.skill-card.bars-animated .skill-bar-fill {
  width: var(--progress, 0%);
}

/* Stagger fill animation per card */
.skill-card:nth-child(1) .skill-bar-fill { transition-delay: 0s; }
.skill-card:nth-child(2) .skill-bar-fill { transition-delay: 0.1s; }
.skill-card:nth-child(3) .skill-bar-fill { transition-delay: 0.2s; }
.skill-card:nth-child(4) .skill-bar-fill { transition-delay: 0.3s; }

/* ============================================================
   CONTACT FORM
   ============================================================ */
.contact-card {
  align-items: start;
}

.contact-details a {
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.copy-email {
  position: relative;
  cursor: pointer;
}

.copy-hint {
  font-size: 11px;
  color: var(--accent-2);
  opacity: 0;
  transition: opacity 0.2s ease;
  margin-left: auto;
  font-weight: 600;
}

.copy-email:hover .copy-hint {
  opacity: 1;
}

.copy-email.copied .contact-text::after {
  content: " ✓";
  color: #4ade80;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-width: 0;
  max-width: 100%;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.form-group input,
.form-group textarea {
  padding: 13px 16px;
  border-radius: 12px;
  border: 1.5px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-family: "Urbanist", sans-serif;
  font-size: 15px;
  outline: none;
  transition: border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
  resize: vertical;
}

body.light-mode .form-group input,
body.light-mode .form-group textarea {
  background: rgba(255, 255, 255, 0.8);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 0 0 3px rgba(247, 209, 84, 0.12);
}

.form-group input.valid {
  border-color: #4ade80;
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.1);
}

.form-group input.invalid,
.form-group textarea.invalid {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.field-error {
  font-size: 12px;
  color: #ef4444;
  min-height: 16px;
  font-weight: 600;
}

.form-submit {
  align-self: flex-start;
  min-width: 180px;
  max-width: 100%;
  box-sizing: border-box;
}

.form-note {
  font-size: 12px;
  color: var(--muted);
  margin: -8px 0 0;
  opacity: 0.7;
}

/* ============================================================
   TOAST NOTIFICATION
   ============================================================ */
.toast {
  position: fixed;
  bottom: 96px;
  right: 24px;
  padding: 14px 20px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  color: #0b0f1c;
  z-index: 200;
  opacity: 0;
  transform: translateY(12px) scale(0.95);
  transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  max-width: 280px;
}

.toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.toast.success {
  background: linear-gradient(135deg, #4ade80, #22d3ee);
  box-shadow: 0 8px 24px rgba(74, 222, 128, 0.3);
}

.toast.info {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 24px rgba(247, 209, 84, 0.3);
}

/* ============================================================
   REDUCED MOTION ADDITIONS
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .scroll-progress-vertical,
  .back-to-top,
  .skill-bar-fill,
  .btn-arrow,
  .theme-toggle {
    animation: none !important;
    transition: none !important;
  }

  .skill-card.bars-animated .skill-bar-fill {
    width: var(--progress, 0%);
    transition: none !important;
  }
}

/* ============================================================
   RESPONSIVE ADDITIONS
   ============================================================ */
@media (max-width: 980px) {
  .contact-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .back-to-top {
    bottom: 20px;
    right: 12px;
    width: 40px;
    height: 40px;
  }

  .form-submit {
    width: 100%;
  }
}

/* ============================================================
   STACK FILTER BAR — category dropdowns
   ============================================================ */
.stack-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
  position: relative;
  z-index: 10;
}

.stack-category {
  position: relative;
}

.stack-cat-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  font-family: "Urbanist", sans-serif;
}

.stack-cat-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(247, 209, 84, 0.06);
}

.stack-cat-btn[aria-expanded="true"] {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(247, 209, 84, 0.08);
}

.stack-chevron {
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.stack-cat-btn[aria-expanded="true"] .stack-chevron {
  transform: rotate(180deg);
}

.stack-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 160px;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(9, 14, 26, 0.96);
  backdrop-filter: blur(12px);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  z-index: 20;
}

.stack-category.open .stack-dropdown {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.stack-tag {
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.stack-tag:hover,
.stack-tag.active {
  background: rgba(92, 197, 255, 0.12);
  border-color: var(--accent-2);
  color: var(--accent-2);
}

/* ============================================================
   PROJECT TOOLBAR (search + count)
   ============================================================ */
.project-toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.project-toolbar input {
  flex: 1 1 260px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  outline: none;
  font-family: "Urbanist", sans-serif;
  font-size: 15px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.project-toolbar input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(247, 209, 84, 0.1);
}

.project-count {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
  margin: 0;
}

/* ============================================================
   PROJECT SHOWCASE CARDS
   ============================================================ */
.project-list {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.project-showcase {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-radius: 20px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.03);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.project-showcase:hover {
  border-color: rgba(92, 197, 255, 0.3);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3), 0 0 24px rgba(92, 197, 255, 0.08);
}

/* Video area */
.project-video-wrap {
  width: 100%;
  background: #000;
  border-radius: 20px 20px 0 0;
  overflow: hidden;
}

.project-video-placeholder {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
}

.project-video-placeholder iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  display: block;
}

/* Empty state shown when iframe src is blank */
.video-empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: rgba(5, 7, 15, 0.85);
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  pointer-events: none;
}

.video-empty-state svg {
  opacity: 0.4;
}

/* Hide empty state when iframe has a real src */
.project-video-placeholder iframe[src]:not([src=""]) + .video-empty-state {
  display: none;
}

/* Body area */
.project-showcase-body {
  padding: 28px 32px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.project-showcase-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin: 0;
  letter-spacing: -0.3px;
}

.project-showcase-sub {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.project-showcase-desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.project-showcase-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.project-showcase-tags span {
  padding: 5px 12px;
  border-radius: 6px;
  border: 1px solid var(--stroke);
  background: rgba(92, 197, 255, 0.06);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-2);
  letter-spacing: 0.02em;
}

/* GitHub button */
.project-github-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  transition: all 0.25s ease;
  align-self: flex-start;
  margin-top: 4px;
}

.project-github-btn:hover {
  border-color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Light mode adjustments */
body.light-mode .stack-dropdown {
  background: rgba(240, 242, 248, 0.98);
}

body.light-mode .project-showcase {
  background: rgba(255, 255, 255, 0.6);
}

body.light-mode .stack-cat-btn {
  background: rgba(0, 0, 0, 0.03);
}

/* Responsive */
@media (max-width: 720px) {
  .project-showcase-body {
    padding: 20px;
  }

  .project-showcase-title {
    font-size: 19px;
  }

  .stack-filter-bar {
    gap: 8px;
  }
}

/* ============================================================
   SKILLS — tab + icon grid redesign
   ============================================================ */

/* Center the section title */
.skills .section-title {
  text-align: center;
  max-width: 100%;
  margin-bottom: 36px;
}

/* Tab pill row */
.skills-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
  position: relative;
}

.skills-tab {
  padding: 9px 22px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  font-family: "Urbanist", sans-serif;
  white-space: nowrap;
}

.skills-tab:hover {
  color: var(--text);
  border-color: var(--stroke-strong);
  background: rgba(255, 255, 255, 0.07);
}

.skills-tab.active {
  background: var(--accent);
  color: #0b0f1c;
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(247, 209, 84, 0.35);
}

/* Panel container — fixed height so layout doesn't jump */
.skills-panels {
  position: relative;
  min-height: 200px;
}

/* Individual panel */
.skills-panel {
  display: none;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.skills-panel.active {
  display: block;
  animation: skillPanelIn 0.35s ease forwards;
}

@keyframes skillPanelIn {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Icon grid */
.skill-icon-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

/* Card — dark square with cyan border glow, matching reference */
.skill-icon-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100px;
  height: 110px;
  padding: 16px 10px 12px;
  border-radius: 16px;
  border: 1px solid rgba(92, 197, 255, 0.18);
  background: rgba(8, 14, 28, 0.75);
  cursor: default;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(6px);
}

/* Cyan glow overlay on hover */
.skill-icon-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: radial-gradient(circle at 50% 30%, rgba(92, 197, 255, 0.14), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.skill-icon-card:hover::before {
  opacity: 1;
}

.skill-icon-card:hover {
  border-color: rgba(92, 197, 255, 0.7);
  background: rgba(8, 14, 28, 0.9);
  transform: translateY(-6px) scale(1.04);
  box-shadow:
    0 0 0 1px rgba(92, 197, 255, 0.3),
    0 8px 28px rgba(0, 0, 0, 0.4),
    0 0 20px rgba(92, 197, 255, 0.2);
}

/* Icon image — 52×52, no container box, just the image */
.skill-icon-img {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: none;
  border: none;
}

.skill-icon-img img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  object-position: center;
  display: block;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.4));
  transition: transform 0.3s ease, filter 0.3s ease;
}

.skill-icon-card:hover .skill-icon-img img {
  transform: scale(1.1);
  filter: drop-shadow(0 4px 12px rgba(92, 197, 255, 0.35));
}

/* Label */
.skill-icon-label {
  font-size: 12px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  line-height: 1.3;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.skill-icon-card:hover .skill-icon-label {
  color: #fff;
}

/* Stagger entrance animation */
.skills-panel.active .skill-icon-card:nth-child(1)  { animation-delay: 0.00s; }
.skills-panel.active .skill-icon-card:nth-child(2)  { animation-delay: 0.05s; }
.skills-panel.active .skill-icon-card:nth-child(3)  { animation-delay: 0.10s; }
.skills-panel.active .skill-icon-card:nth-child(4)  { animation-delay: 0.15s; }
.skills-panel.active .skill-icon-card:nth-child(5)  { animation-delay: 0.20s; }
.skills-panel.active .skill-icon-card:nth-child(6)  { animation-delay: 0.25s; }
.skills-panel.active .skill-icon-card:nth-child(7)  { animation-delay: 0.30s; }

.skills-panel.active .skill-icon-card {
  animation: skillCardIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes skillCardIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.88);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Light mode */
body.light-mode .skills-tab {
  background: rgba(0, 0, 0, 0.03);
  color: var(--muted);
}

body.light-mode .skills-tab.active {
  background: var(--accent);
  color: #0b0f1c;
}

body.light-mode .skill-icon-card {
  background: rgba(255, 255, 255, 0.6);
  border-color: rgba(0, 144, 204, 0.2);
}

body.light-mode .skill-icon-card:hover {
  border-color: rgba(0, 144, 204, 0.7);
  background: rgba(255, 255, 255, 0.85);
  box-shadow:
    0 0 0 1px rgba(0, 144, 204, 0.3),
    0 8px 28px rgba(0, 0, 0, 0.12),
    0 0 20px rgba(0, 144, 204, 0.15);
}

body.light-mode .skill-icon-label {
  color: var(--muted);
}

body.light-mode .skill-icon-card:hover .skill-icon-label {
  color: var(--text);
}

/* Responsive */
@media (max-width: 720px) {
  .skill-icon-card {
    width: 84px;
    height: 96px;
    padding: 12px 8px 10px;
  }

  .skill-icon-img img {
    width: 42px;
    height: 42px;
  }

  .skill-icon-grid {
    gap: 10px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .skills-panel.active,
  .skills-panel.active .skill-icon-card {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================================
   VIDEO LANGUAGE TABS
   ============================================================ */
.video-lang-tabs {
  display: flex;
  gap: 8px;
  padding: 12px 16px 0;
  background: #000;
  border-radius: 20px 20px 0 0;
}

.video-lang-btn {
  padding: 7px 16px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: "Urbanist", sans-serif;
  white-space: nowrap;
}

.video-lang-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.85);
}

.video-lang-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #0b0f1c;
}

/* Adjust video-wrap border-radius since tabs sit above */
.project-video-wrap:has(.video-lang-tabs) {
  border-radius: 20px 20px 0 0;
}

.project-video-wrap:has(.video-lang-tabs) .project-video-placeholder {
  border-radius: 0;
}