:root {
  --font-sans: "Inter", sans-serif;
  --bg: #07111f;
  --bg-soft: #0d1727;
  --bg-elevated: rgba(14, 25, 41, 0.78);
  --surface: #111f33;
  --surface-strong: #15263e;
  --text: #ebf4ff;
  --text-soft: #9db0c7;
  --border: rgba(125, 161, 201, 0.18);
  --accent: #34d7ff;
  --accent-strong: #1098ff;
  --accent-soft: rgba(52, 215, 255, 0.16);
  --shadow: 0 24px 80px rgba(2, 10, 20, 0.35);
  --radius: 20px;
  --radius-sm: 14px;
  --radius-pill: 999px;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4rem;
  --space-8: 6rem;
  --container: 1180px;
  --transition: 180ms ease;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

body[data-theme="light"] {
  --bg: #f5fbff;
  --bg-soft: #edf5fb;
  --bg-elevated: rgba(255, 255, 255, 0.82);
  --surface: #ffffff;
  --surface-strong: #eef7ff;
  --text: #08131f;
  --text-soft: #4b647f;
  --border: rgba(25, 74, 120, 0.12);
  --accent: #008fd6;
  --accent-strong: #006eb8;
  --accent-soft: rgba(0, 143, 214, 0.12);
  --shadow: 0 18px 60px rgba(14, 40, 74, 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at top right, rgba(52, 215, 255, 0.11), transparent 24%),
    radial-gradient(circle at top left, rgba(16, 152, 255, 0.1), transparent 18%),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background-color var(--transition), color var(--transition);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.narrow {
  max-width: 820px;
}

.section {
  padding: var(--space-8) 0;
}

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(17, 31, 51, 0.24), transparent);
}

.eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--accent);
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.lead {
  font-size: 1.08rem;
  color: var(--text-soft);
  max-width: 62ch;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  background: rgba(7, 17, 31, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

body[data-theme="light"] .site-header {
  background: rgba(245, 251, 255, 0.78);
}

.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: var(--space-3);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-mark {
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent-soft), rgba(16, 152, 255, 0.18));
  border: 1px solid rgba(52, 215, 255, 0.22);
  color: var(--accent);
  font-weight: 800;
}

.brand-text {
  display: grid;
  gap: 0.15rem;
  font-size: 0.82rem;
  color: var(--text-soft);
}

.brand-text strong {
  color: var(--text);
  font-size: 0.98rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.site-nav a {
  padding: 0.7rem 0.95rem;
  color: var(--text-soft);
  border-radius: var(--radius-pill);
  transition: color var(--transition), background-color var(--transition);
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.theme-toggle {
  position: relative;
  width: 3.6rem;
  height: 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  cursor: pointer;
}

.theme-toggle-track {
  position: absolute;
  top: 0.24rem;
  left: 0.25rem;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  transition: transform var(--transition);
}

body[data-theme="light"] .theme-toggle-track {
  transform: translateX(1.55rem);
}

.menu-toggle {
  display: none;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 1.3rem;
  height: 2px;
  margin: 0.28rem auto;
  background: var(--text);
}

.hero {
  padding-top: 5rem;
}

.hero-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-6);
  align-items: center;
}

.hero-copy h1,
.page-hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.page-hero h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

.hero-actions,
.card-actions,
.footer-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
}

.typing-shell {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: var(--space-4) 0 var(--space-5);
  padding: 0.9rem 1rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.typing-label {
  color: var(--text-soft);
}

.typing-text {
  color: var(--accent);
  font-weight: 600;
}

.typing-text::after {
  content: "";
  display: inline-block;
  width: 0.1rem;
  height: 1em;
  margin-left: 0.2rem;
  vertical-align: -0.12em;
  background: currentColor;
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.button,
.text-link {
  transition: transform var(--transition), color var(--transition), border-color var(--transition), background-color var(--transition);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 600;
}

.button:hover,
.text-link:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #021018;
  background: linear-gradient(135deg, var(--accent), #71e7ff);
  box-shadow: 0 0 0 1px rgba(52, 215, 255, 0.18), 0 20px 40px rgba(16, 152, 255, 0.22);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--border);
}

.button-ghost,
.text-link {
  color: var(--accent);
}

.glass-card {
  position: relative;
  overflow: hidden;
  padding: var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.glass-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(52, 215, 255, 0.08), transparent 32%);
  pointer-events: none;
}

.glass-card:hover {
  border-color: rgba(52, 215, 255, 0.28);
}

.panel-grid,
.card-grid,
.chip-grid {
  display: grid;
  gap: var(--space-4);
}

.panel-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.section-heading {
  margin-bottom: var(--space-5);
}

.section-heading h2,
.glass-card h2,
.glass-card h3 {
  margin-top: 0;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.glass-card p,
.section-heading p,
.testimonial-card footer,
.contact-card p {
  color: var(--text-soft);
}

.code-card {
  min-height: 100%;
}

.code-title {
  margin-top: 0;
  font-weight: 700;
  color: var(--text);
}

.code-list,
.extension-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-soft);
}

.stat-card {
  min-height: 150px;
  display: grid;
  align-content: center;
}

.stat-value {
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  margin-top: 0.7rem;
  color: var(--text-soft);
}

.skill-chip {
  padding: 0.8rem 1rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-weight: 500;
}

.chip-grid {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.testimonial-card {
  margin: 0;
}

.testimonial-card p {
  margin-top: 0;
}

.contact-form,
.contact-card {
  display: grid;
  gap: 1rem;
}

.contact-form label {
  display: grid;
  gap: 0.55rem;
}

.contact-form span {
  color: var(--text-soft);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 14px;
  outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: rgba(52, 215, 255, 0.45);
  box-shadow: 0 0 0 4px rgba(52, 215, 255, 0.08);
}

.form-note,
.form-status {
  margin: 0;
  color: var(--text-soft);
}

.form-status:not(:empty) {
  padding-top: 0.2rem;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.2rem;
  background: rgba(2, 10, 20, 0.68);
  backdrop-filter: blur(10px);
}

.modal-backdrop[hidden] {
  display: none;
}

.modal-panel {
  width: min(100%, 32rem);
  margin: 0 auto;
  padding: 1.6rem;
  text-align: center;
}

.modal-panel h2 {
  margin-top: 0;
  margin-bottom: 0.7rem;
}

.modal-panel p:last-of-type {
  margin-bottom: 1.25rem;
}

.modal-icon {
  width: 5.25rem;
  height: 5.25rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top, rgba(114, 255, 172, 0.28), rgba(25, 122, 66, 0.16));
  border: 1px solid rgba(114, 255, 172, 0.38);
  box-shadow: 0 18px 40px rgba(19, 112, 58, 0.18);
}

.modal-checkmark {
  width: 1.25rem;
  height: 2rem;
  border-right: 0.28rem solid #6df0a0;
  border-bottom: 0.28rem solid #6df0a0;
  transform: rotate(45deg) translateY(-0.08rem);
}

#success-modal-button {
  width: 100%;
  min-height: 3.5rem;
  justify-content: center;
  text-align: center;
}

.site-footer {
  padding: var(--space-5) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-shell {
  justify-content: space-between;
}

.footer-shell p {
  margin: 0;
  color: var(--text-soft);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 550ms ease, transform 550ms ease;
}

.reveal.visible,
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

body[data-page="home"] {
  background:
    radial-gradient(circle at top right, rgba(52, 215, 255, 0.11), transparent 24%),
    radial-gradient(circle at top left, rgba(16, 152, 255, 0.1), transparent 18%),
    var(--bg);
}

body[data-page="home"] .page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  transition: opacity 0.5s var(--ease-out), visibility 0.5s var(--ease-out);
}

body[data-page="home"] .page-loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

body[data-page="home"] .loader-inner {
  text-align: center;
}

body[data-page="home"] .loader-bar {
  width: 160px;
  height: 3px;
  margin: 0 auto 12px;
  overflow: hidden;
  border-radius: 3px;
  background: var(--surface);
}

body[data-page="home"] .loader-bar::after {
  content: "";
  display: block;
  width: 40%;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), #71e7ff);
  animation: home-loader-slide 0.9s ease-in-out infinite;
}

body[data-page="home"] .loader-text {
  color: var(--text-soft);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

body[data-page="home"] .scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 10001;
  width: 0;
  height: 3px;
  background: linear-gradient(135deg, var(--accent), #71e7ff);
  transform-origin: left;
  transition: width 0.05s linear;
}

body[data-page="home"] .particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.45;
}

body[data-page="home"] .hero {
  padding-top: clamp(3rem, 8vw, 5rem);
  padding-bottom: clamp(4rem, 12vw, 7rem);
}

body[data-page="home"] .hero-inner {
  max-width: 720px;
}

body[data-page="home"] .hero-eyebrow,
body[data-page="home"] .section-label {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

body[data-page="home"] .hero-title {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

body[data-page="home"] .hero-typing {
  min-height: 1.6em;
  margin-bottom: 1rem;
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--text-soft);
}

body[data-page="home"] .typing-prefix {
  color: var(--text-soft);
}

body[data-page="home"] .typing-cursor {
  display: inline-block;
  margin-left: 2px;
  color: var(--accent);
  animation: home-blink 1s step-end infinite;
}

body[data-page="home"] .hero-sub {
  margin: 0 0 1rem;
  color: var(--text-soft);
  font-size: 1.05rem;
}

body[data-page="home"] .hero-desc {
  max-width: 640px;
  margin: 0 0 2rem;
  color: var(--text-soft);
  font-size: 0.95rem;
}

body[data-page="home"] .hero-actions,
body[data-page="home"] .project-actions,
body[data-page="home"] .footer-inner,
body[data-page="home"] .social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

body[data-page="home"] .fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  animation: home-fade-in-up 0.8s var(--ease-out) forwards;
}

body[data-page="home"] .delay-1 { animation-delay: 0.1s; }
body[data-page="home"] .delay-2 { animation-delay: 0.2s; }
body[data-page="home"] .delay-3 { animation-delay: 0.35s; }
body[data-page="home"] .delay-4 { animation-delay: 0.5s; }
body[data-page="home"] .delay-5 { animation-delay: 0.65s; }

body[data-page="home"] .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.35rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--dur), box-shadow var(--dur), background var(--dur), border-color var(--dur);
}

body[data-page="home"] .btn:active {
  transform: scale(0.98);
}

body[data-page="home"] .btn-primary {
  color: #021018;
  background: linear-gradient(135deg, var(--accent), #71e7ff);
  box-shadow: 0 4px 24px rgba(34, 211, 238, 0.25);
}

body[data-page="home"] .btn-primary:hover {
  box-shadow: 0 8px 32px rgba(34, 211, 238, 0.35);
}

body[data-page="home"] .btn-outline {
  color: var(--text);
  background: transparent;
  border-color: var(--border);
}

body[data-page="home"] .btn-outline:hover {
  border-color: rgba(52, 215, 255, 0.45);
  background: var(--accent-soft);
}

body[data-page="home"] .btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

body[data-page="home"] .section-header {
  max-width: 560px;
  margin: 0 auto 3rem;
  text-align: center;
}

body[data-page="home"] .section-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

body[data-page="home"] .section-desc,
body[data-page="home"] .service-card p,
body[data-page="home"] .project-body p,
body[data-page="home"] .why-card p,
body[data-page="home"] .about-card p,
body[data-page="home"] .contact-value,
body[data-page="home"] .footer-copy {
  color: var(--text-soft);
}

body[data-page="home"] .subsection-head {
  margin-top: clamp(3rem, 8vw, 4.5rem);
}

body[data-page="home"] .services-grid,
body[data-page="home"] .projects-grid,
body[data-page="home"] .skills-layout,
body[data-page="home"] .why-grid,
body[data-page="home"] .contact-grid {
  display: grid;
}

body[data-page="home"] .services-grid {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

body[data-page="home"] .service-card h3,
body[data-page="home"] .why-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

body[data-page="home"] .projects-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

body[data-page="home"] .project-card {
  overflow: hidden;
  padding: 0;
  display: flex;
  flex-direction: column;
}

body[data-page="home"] .project-image {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(145deg, rgba(52, 215, 255, 0.15) 0%, rgba(16, 152, 255, 0.1) 50%, var(--surface) 100%);
  border-bottom: 1px solid var(--border);
}

body[data-page="home"] .project-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(-45deg, transparent, transparent 8px, rgba(255, 255, 255, 0.02) 8px, rgba(255, 255, 255, 0.02) 16px);
}

body[data-page="home"] .project-body {
  padding: 1.35rem 1.5rem 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

body[data-page="home"] .project-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

body[data-page="home"] .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

body[data-page="home"] .tag {
  padding: 0.25rem 0.55rem;
  border: 1px solid rgba(52, 215, 255, 0.2);
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 500;
}

body[data-page="home"] .skills-layout {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

body[data-page="home"] .skill-group-title {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

body[data-page="home"] .skill-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

body[data-page="home"] .skill-list li {
  padding: 0.4rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-soft);
  font-size: 0.85rem;
  font-weight: 500;
}

body[data-page="home"] .about-layout .section-header {
  margin-bottom: 1.5rem;
}

body[data-page="home"] .about-card p {
  margin: 0 0 1rem;
  font-size: 0.98rem;
}

body[data-page="home"] .about-card p:last-child {
  margin-bottom: 0;
}

body[data-page="home"] .about-highlight {
  padding: 1rem 1.25rem;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--accent-soft);
  color: var(--text) !important;
}

body[data-page="home"] .why-grid {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
}

body[data-page="home"] .why-card {
  text-align: left;
}

body[data-page="home"] .why-icon {
  margin-bottom: 0.75rem;
  font-size: 1.5rem;
  opacity: 0.9;
}

body[data-page="home"] .stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: clamp(2rem, 5vw, 3rem);
  text-align: center;
}

body[data-page="home"] .stat-item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

body[data-page="home"] .stat-value {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  line-height: 1;
}

body[data-page="home"] .stat-label {
  color: var(--text-soft);
  font-size: 0.85rem;
  font-weight: 500;
}

body[data-page="home"] .contact-grid {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
}

body[data-page="home"] .contact-card {
  text-decoration: none;
  color: inherit;
}

body[data-page="home"] .contact-label {
  color: var(--accent);
}

body[data-page="home"] .site-footer {
  padding: 2.5rem 0;
}

body[data-page="home"] .footer-inner {
  justify-content: space-between;
}

body[data-page="home"] .footer-copy {
  margin: 0;
  font-size: 0.85rem;
}

body[data-page="home"] .social-link {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-soft);
}

body[data-page="home"] .social-link:hover {
  color: var(--accent);
  border-color: rgba(52, 215, 255, 0.45);
}

body[data-page="home"] .back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 9998;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: opacity var(--dur), transform var(--dur), border-color var(--dur);
}

body[data-page="home"] .back-to-top:hover {
  color: var(--accent);
  border-color: rgba(52, 215, 255, 0.45);
}

body[data-page="home"] .back-to-top[hidden] {
  display: none;
}

@keyframes home-loader-slide {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

@keyframes home-fade-in-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes home-blink {
  50% { opacity: 0; }
}

@media (max-width: 1080px) {
  .card-grid-4,
  .card-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  body[data-page="home"] .stats-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 820px) {
  .site-nav {
    position: absolute;
    top: calc(100% + 0.7rem);
    left: 1rem;
    right: 1rem;
    display: grid;
    gap: 0.35rem;
    padding: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition);
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .menu-toggle {
    display: inline-block;
  }

  .card-grid-2,
  .card-grid-3,
  .card-grid-4,
  .panel-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 4.5rem 0;
  }

  .hero {
    padding-top: 3.5rem;
  }

  body[data-page="home"] .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(calc(100% - 1.2rem), var(--container));
  }

  .hero-copy h1,
  .page-hero h1 {
    font-size: 2.1rem;
  }

  .glass-card {
    padding: 1.25rem;
  }

  .nav-shell {
    min-height: 70px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  body[data-page="home"] .fade-in-up {
    opacity: 1;
    transform: none;
    animation: none;
  }

  body[data-page="home"] .typing-cursor {
    animation: none;
  }
}