/* ================================================
   NEXUS — Cyberpunk Digital Experience
   Pure CSS3 — Modern Features Showcase
   ================================================ */

/* ------------------------------------------------
   CSS Custom Properties (@property for animation)
   ------------------------------------------------ */
@property --gradient-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

@property --glow-opacity {
  syntax: '<number>';
  initial-value: 0;
  inherits: false;
}

@property --skill-progress {
  syntax: '<number>';
  initial-value: 0;
  inherits: false;
}

/* ------------------------------------------------
   Design Tokens — Dark Theme (Default)
   ------------------------------------------------ */
:root {
  /* Colors — Cyberpunk palette */
  --c-bg:              #07070d;
  --c-bg-alt:          #0d0d18;
  --c-bg-card:         #0f0f1a;
  --c-bg-elevated:     #14142a;
  --c-surface:         rgba(255, 255, 255, 0.03);
  --c-border:          rgba(255, 255, 255, 0.06);
  --c-border-hover:    rgba(255, 255, 255, 0.12);

  --c-text:            #e8e8f0;
  --c-text-muted:      #8888a8;
  --c-text-dim:        #555570;

  --c-accent:          #a855f7;
  --c-accent-light:    #c084fc;
  --c-accent-dark:     #7c3aed;
  --c-accent-glow:     rgba(168, 85, 247, 0.3);

  --c-cyan:            #06b6d4;
  --c-cyan-glow:       rgba(6, 182, 212, 0.3);
  --c-magenta:         #ec4899;
  --c-magenta-glow:    rgba(236, 72, 153, 0.3);
  --c-green:           #10b981;
  --c-yellow:          #f59e0b;
  --c-red:             #ef4444;

  /* Typography scale */
  --f-sans:            'Space Grotesk', 'Inter', system-ui, -apple-system, sans-serif;
  --f-mono:            'JetBrains Mono', 'Fira Code', monospace;

  --fs-xs:             clamp(0.7rem, 0.65rem + 0.25vw, 0.8rem);
  --fs-sm:             clamp(0.8rem, 0.75rem + 0.3vw, 0.9rem);
  --fs-base:           clamp(0.95rem, 0.85rem + 0.4vw, 1.05rem);
  --fs-md:             clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  --fs-lg:             clamp(1.5rem, 1.2rem + 1.2vw, 2rem);
  --fs-xl:             clamp(2rem, 1.5rem + 2vw, 3rem);
  --fs-2xl:            clamp(2.5rem, 1.8rem + 3vw, 4.5rem);
  --fs-hero:           clamp(3rem, 2rem + 5vw, 7rem);

  /* Spacing */
  --sp-xs:             0.25rem;
  --sp-sm:             0.5rem;
  --sp-md:             1rem;
  --sp-lg:             1.5rem;
  --sp-xl:             2rem;
  --sp-2xl:            3rem;
  --sp-3xl:            5rem;
  --sp-section:        clamp(4rem, 3rem + 6vw, 10rem);

  /* Layout */
  --max-width:         1400px;
  --nav-height:        4.5rem;
  --border-radius:     0.75rem;
  --border-radius-lg:  1.25rem;

  /* Transitions */
  --ease-out:          cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring:       cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth:       cubic-bezier(0.45, 0, 0.15, 1);
  --duration-fast:     150ms;
  --duration-base:     300ms;
  --duration-slow:     600ms;
  --duration-glacial:  1200ms;

  /* Z-index layers */
  --z-base:            1;
  --z-sticky:          100;
  --z-overlay:         200;
  --z-modal:           300;
  --z-cursor:          400;
  --z-loader:          500;
}

/* ------------------------------------------------
   Light Theme Override
   ------------------------------------------------ */
[data-theme="light"] {
  --c-bg:              #f5f5fa;
  --c-bg-alt:          #eeeef5;
  --c-bg-card:         #ffffff;
  --c-bg-elevated:     #ffffff;
  --c-surface:         rgba(0, 0, 0, 0.03);
  --c-border:          rgba(0, 0, 0, 0.08);
  --c-border-hover:    rgba(0, 0, 0, 0.15);

  --c-text:            #1a1a2e;
  --c-text-muted:      #6b6b8a;
  --c-text-dim:        #9999b0;

  --c-accent:          #7c3aed;
  --c-accent-light:    #a855f7;
  --c-accent-dark:     #6d28d9;
  --c-accent-glow:     rgba(124, 58, 237, 0.15);

  --c-cyan-glow:       rgba(6, 182, 212, 0.15);
  --c-magenta-glow:    rgba(236, 72, 153, 0.15);
}

/* ------------------------------------------------
   CSS Reset + Base
   ------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scrollbar-color: var(--c-accent) var(--c-bg);
}

body {
  font-family: var(--f-sans);
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--c-text);
  background-color: var(--c-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--duration-slow) var(--ease-smooth),
              color var(--duration-slow) var(--ease-smooth);
}

/* Focus styles */
:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--c-accent);
  color: #fff;
}

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

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

code {
  font-family: var(--f-mono);
  font-size: 0.85em;
  background: var(--c-surface);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--c-border);
}

/* Utility */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--sp-lg);
}

.text-accent {
  color: var(--c-accent);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ------------------------------------------------
   LOADING SCREEN
   ------------------------------------------------ */
.loader {
  position: fixed;
  inset: 0;
  z-index: var(--z-loader);
  display: grid;
  place-items: center;
  background: var(--c-bg);
  transition: opacity 0.6s var(--ease-out), visibility 0.6s;
}

.loader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__inner {
  text-align: center;
}

.loader__glitch {
  font-family: var(--f-mono);
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--c-text);
  position: relative;
  animation: glitch-text 2s infinite;
}

.loader__glitch::before,
.loader__glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.loader__glitch::before {
  color: var(--c-cyan);
  animation: glitch-before 2s infinite;
  clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%);
}

.loader__glitch::after {
  color: var(--c-magenta);
  animation: glitch-after 2s infinite;
  clip-path: polygon(0 66%, 100% 66%, 100% 100%, 0 100%);
}

@keyframes glitch-before {
  0%, 100% { transform: translate(0); }
  20% { transform: translate(-3px, 2px); }
  40% { transform: translate(3px, -2px); }
  60% { transform: translate(-2px, 1px); }
  80% { transform: translate(2px, -1px); }
}

@keyframes glitch-after {
  0%, 100% { transform: translate(0); }
  20% { transform: translate(3px, -2px); }
  40% { transform: translate(-3px, 2px); }
  60% { transform: translate(2px, -1px); }
  80% { transform: translate(-2px, 1px); }
}

@keyframes glitch-text {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
  51% { opacity: 1; }
  52% { opacity: 0.9; }
}

.loader__bar {
  width: 200px;
  height: 2px;
  background: var(--c-border);
  margin: var(--sp-lg) auto 0;
  border-radius: 2px;
  overflow: hidden;
}

.loader__progress {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--c-accent), var(--c-cyan));
  border-radius: 2px;
  transition: width 0.3s var(--ease-out);
}

.loader__status {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  margin-top: var(--sp-md);
}

/* ------------------------------------------------
   CUSTOM CURSOR
   ------------------------------------------------ */
.cursor {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-cursor);
  pointer-events: none;
  mix-blend-mode: difference;
}

@media (hover: hover) and (pointer: fine) {
  .cursor { display: block; }
  * { cursor: none !important; }
}

.cursor__dot {
  width: 8px;
  height: 8px;
  background: #fff;
  border-radius: 50%;
  position: absolute;
  top: -4px;
  left: -4px;
  transition: transform 0.1s var(--ease-out);
}

.cursor__ring {
  width: 40px;
  height: 40px;
  border: 1.5px solid rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  position: absolute;
  top: -20px;
  left: -20px;
  transition: width 0.3s var(--ease-spring),
              height 0.3s var(--ease-spring),
              top 0.3s var(--ease-spring),
              left 0.3s var(--ease-spring),
              border-color 0.3s;
}

body:has(.magnetic:hover) .cursor__ring,
body:has(a:hover) .cursor__ring,
body:has(button:hover) .cursor__ring {
  width: 60px;
  height: 60px;
  top: -30px;
  left: -30px;
  border-color: var(--c-accent);
}

body:has(.form-input:focus) .cursor__dot {
  transform: scale(0.5);
}

/* ------------------------------------------------
   SCROLL PROGRESS BAR (CSS scroll-driven animation)
   ------------------------------------------------ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-cyan), var(--c-magenta));
  transform-origin: left;
  transform: scaleX(0);
  z-index: var(--z-sticky);
  animation: scroll-progress-fill linear both;
  animation-timeline: scroll(root);
}

@keyframes scroll-progress-fill {
  to { transform: scaleX(1); }
}

/* ------------------------------------------------
   NAVIGATION
   ------------------------------------------------ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-sticky);
  padding: var(--sp-md) 0;
  transition: background-color var(--duration-base) var(--ease-out),
              backdrop-filter var(--duration-base);
}

.header.is-scrolled {
  background-color: color-mix(in srgb, var(--c-bg) 80%, transparent);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--c-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--sp-lg);
  height: var(--nav-height);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-xs);
  font-family: var(--f-mono);
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.nav__logo-dot {
  width: 8px;
  height: 8px;
  background: var(--c-accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--sp-xl);
}

@media (min-width: 900px) {
  .nav__links { display: flex; }
}

.nav__link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-text-muted);
  letter-spacing: 0.02em;
  position: relative;
  transition: color var(--duration-base);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration-base) var(--ease-out);
}

.nav__link:hover {
  color: var(--c-text);
}

.nav__link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}

/* Theme toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--c-text-muted);
  transition: color var(--duration-base), background-color var(--duration-base);
}

.theme-toggle:hover {
  color: var(--c-text);
  background-color: var(--c-surface);
}

[data-theme="dark"] .theme-toggle__moon { display: none; }
[data-theme="light"] .theme-toggle__sun { display: none; }

/* Burger menu */
.nav__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: 4px 0;
}

@media (min-width: 900px) {
  .nav__burger { display: none; }
}

.nav__burger-line {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-fast);
  transform-origin: center;
}

.nav__burger[aria-expanded="true"] .nav__burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__burger[aria-expanded="true"] .nav__burger-line:nth-child(2) {
  opacity: 0;
}

.nav__burger[aria-expanded="true"] .nav__burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-sticky) - 1);
  background: color-mix(in srgb, var(--c-bg) 95%, transparent);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-slow) var(--ease-out),
              visibility var(--duration-slow);
}

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-xl);
}

.mobile-menu__link {
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out),
              color var(--duration-fast);
}

.mobile-menu.is-open .mobile-menu__link {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered entrance for mobile links */
.mobile-menu.is-open .mobile-menu__link:nth-child(1) { transition-delay: 100ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(2) { transition-delay: 150ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(3) { transition-delay: 200ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(4) { transition-delay: 250ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(5) { transition-delay: 300ms; }
.mobile-menu.is-open .mobile-menu__link:nth-child(6) { transition-delay: 350ms; }

.mobile-menu__link:hover {
  color: var(--c-accent);
}

/* ------------------------------------------------
   HERO SECTION
   ------------------------------------------------ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero__content {
  position: relative;
  z-index: var(--z-base);
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--sp-lg);
  padding-top: var(--nav-height);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-sm);
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--sp-xl);
  padding: var(--sp-xs) var(--sp-md);
  border: 1px solid var(--c-border);
  border-radius: 100px;
  background: var(--c-surface);
  backdrop-filter: blur(10px);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  background: var(--c-green);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero__title {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--sp-xl);
}

.hero__title-line {
  font-size: var(--fs-hero);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero__title-line--accent {
  background: linear-gradient(135deg, var(--c-accent), var(--c-cyan), var(--c-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 200%;
  animation: gradient-shift 4s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero__subtitle {
  font-size: var(--fs-md);
  color: var(--c-text-muted);
  max-width: 550px;
  line-height: 1.7;
  margin-bottom: var(--sp-2xl);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-md);
}

/* Scroll indicator */
.hero__scroll-indicator {
  position: absolute;
  bottom: var(--sp-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-sm);
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--c-accent), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}

@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

.hero__scroll-text {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.2em;
}

/* Floating glitch blocks */
.glitch-block {
  position: absolute;
  background: var(--c-accent-glow);
  pointer-events: none;
  z-index: 0;
}

.glitch-block--1 {
  width: 120px;
  height: 3px;
  top: 20%;
  right: 10%;
  animation: glitch-block-h 3s ease-in-out infinite;
}

.glitch-block--2 {
  width: 3px;
  height: 80px;
  top: 60%;
  left: 8%;
  animation: glitch-block-v 4s ease-in-out infinite 1s;
}

.glitch-block--3 {
  width: 60px;
  height: 60px;
  bottom: 25%;
  right: 20%;
  border: 1px solid var(--c-cyan-glow);
  animation: glitch-block-spin 6s linear infinite;
}

@keyframes glitch-block-h {
  0%, 100% { opacity: 0; transform: translateX(0); }
  10% { opacity: 1; }
  50% { opacity: 0.3; transform: translateX(-30px); }
  90% { opacity: 1; }
}

@keyframes glitch-block-v {
  0%, 100% { opacity: 0; transform: translateY(0); }
  10% { opacity: 0.5; }
  50% { opacity: 0.2; transform: translateY(20px); }
  90% { opacity: 0.5; }
}

@keyframes glitch-block-spin {
  to { transform: rotate(360deg); }
}

/* ------------------------------------------------
   BUTTONS
   ------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-sm);
  font-family: var(--f-sans);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.85rem 1.8rem;
  border-radius: 100px;
  position: relative;
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-out);
}

.btn--primary {
  background: var(--c-accent);
  color: #fff;
  border: 1px solid var(--c-accent);
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.15));
  opacity: 0;
  transition: opacity var(--duration-base);
}

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

.btn--primary:hover {
  box-shadow: 0 0 30px var(--c-accent-glow),
              0 0 60px color-mix(in srgb, var(--c-accent-glow) 50%, transparent);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border);
}

.btn--ghost:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: var(--c-accent-glow);
}

.btn--full {
  width: 100%;
}

.btn__icon {
  transition: transform var(--duration-base) var(--ease-out);
}

.btn:hover .btn__icon {
  transform: translate(3px, -3px);
}

.btn__loader,
.btn__success {
  display: none;
}

.btn.is-loading .btn__text { display: none; }
.btn.is-loading .btn__loader {
  display: block;
  animation: spin 1s linear infinite;
}

.btn.is-success .btn__text { display: none; }
.btn.is-success .btn__loader { display: none; }
.btn.is-success .btn__success { display: block; }
.btn.is-success {
  background: var(--c-green);
  border-color: var(--c-green);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ------------------------------------------------
   SECTIONS — Shared Styles
   ------------------------------------------------ */
.section {
  padding: var(--sp-section) 0;
  position: relative;
}

.section__header {
  margin-bottom: var(--sp-3xl);
}

.section__number {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-accent);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: var(--sp-sm);
}

.section__title {
  font-size: var(--fs-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.section__line {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), transparent);
  margin-top: var(--sp-lg);
}

.section__subtitle {
  font-size: var(--fs-base);
  color: var(--c-text-muted);
  max-width: 600px;
  margin-top: var(--sp-md);
}

/* ------------------------------------------------
   ABOUT SECTION
   ------------------------------------------------ */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3xl);
}

@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: 1.5fr 1fr;
    align-items: start;
  }
}

.about__intro {
  font-size: var(--fs-lg);
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: var(--sp-xl);
}

.about__intro em {
  color: var(--c-accent);
  font-style: normal;
}

.about__body {
  font-size: var(--fs-base);
  color: var(--c-text-muted);
  line-height: 1.8;
  margin-bottom: var(--sp-lg);
}

.about__body strong {
  color: var(--c-text);
}

.about__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-xl);
}

.stat {
  padding: var(--sp-lg);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--border-radius);
  text-align: center;
  transition: border-color var(--duration-base), transform var(--duration-base);
}

.stat:hover {
  border-color: var(--c-accent);
  transform: translateY(-4px);
}

.stat__number {
  font-size: var(--fs-2xl);
  font-weight: 900;
  font-family: var(--f-mono);
  background: linear-gradient(135deg, var(--c-accent), var(--c-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat__suffix {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--c-accent);
}

.stat__label {
  display: block;
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  margin-top: var(--sp-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ------------------------------------------------
   SKILLS SECTION
   ------------------------------------------------ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--sp-xl);
}

@media (min-width: 768px) {
  .skills__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .skills__grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

.skill-card {
  text-align: center;
  padding: var(--sp-xl) var(--sp-md);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--border-radius-lg);
  transition: border-color var(--duration-base),
              transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base);
  container-type: inline-size;
}

.skill-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-8px);
  box-shadow: 0 20px 40px -20px var(--c-accent-glow);
}

.skill-card__ring {
  position: relative;
  width: 100px;
  height: 100px;
  margin: 0 auto var(--sp-md);
}

/* Container query: shrink ring on tiny cards */
@container (max-width: 160px) {
  .skill-card__ring {
    width: 70px;
    height: 70px;
  }
}

.skill-card__svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.skill-card__track {
  fill: none;
  stroke: var(--c-border);
  stroke-width: 4;
}

.skill-card__fill {
  fill: none;
  stroke: var(--c-accent);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-dasharray: 339.292;
  stroke-dashoffset: 339.292;
  transition: stroke-dashoffset 1.5s var(--ease-out);
  filter: drop-shadow(0 0 6px var(--c-accent-glow));
}

.skill-card.is-visible .skill-card__fill {
  stroke-dashoffset: calc(339.292 - (339.292 * var(--skill-level) / 100));
}

.skill-card__percent {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--c-accent);
}

.skill-card__name {
  font-size: var(--fs-sm);
  font-weight: 700;
  margin-bottom: var(--sp-xs);
}

.skill-card__desc {
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  line-height: 1.5;
}

/* ------------------------------------------------
   PROJECTS SECTION (Horizontal Scroll)
   ------------------------------------------------ */
.projects {
  background: var(--c-bg-alt);
  overflow: hidden;
}

.projects__horizontal-wrapper {
  overflow: hidden;
}

.projects__track {
  display: flex;
  gap: var(--sp-xl);
  padding: 0 var(--sp-lg);
  /* Width will be set by GSAP for horizontal scroll */
}

.project-card {
  flex: 0 0 380px;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: border-color var(--duration-base),
              box-shadow var(--duration-slow);
  transform-style: preserve-3d;
  perspective: 1000px;
}

@media (min-width: 768px) {
  .project-card {
    flex: 0 0 450px;
  }
}

.project-card:hover {
  border-color: var(--c-accent);
  box-shadow: 0 30px 60px -20px rgba(0, 0, 0, 0.4),
              0 0 40px -10px var(--c-accent-glow);
}

.project-card__image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

.project-card__placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    hsl(var(--hue, 280) 60% 15%),
    hsl(var(--hue, 280) 80% 25%)
  );
  display: grid;
  place-items: center;
}

.project-card__placeholder-icon {
  font-family: var(--f-mono);
  font-size: var(--fs-2xl);
  font-weight: 900;
  color: rgba(255, 255, 255, 0.15);
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--c-bg-card), transparent 60%);
}

.project-card__content {
  padding: var(--sp-lg);
}

.project-card__tag {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.project-card__title {
  font-size: var(--fs-lg);
  font-weight: 700;
  margin: var(--sp-sm) 0;
  letter-spacing: -0.02em;
}

.project-card__desc {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.6;
  margin-bottom: var(--sp-md);
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm);
}

.project-card__tech span {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  padding: 0.2em 0.6em;
  border: 1px solid var(--c-border);
  border-radius: 100px;
  color: var(--c-text-muted);
}

/* ------------------------------------------------
   API DEMO SECTION
   ------------------------------------------------ */
.api-demo__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-xl);
}

@media (min-width: 768px) {
  .api-demo__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.api-widget {
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: border-color var(--duration-base);
}

.api-widget:hover {
  border-color: var(--c-accent);
}

.api-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-md) var(--sp-lg);
  border-bottom: 1px solid var(--c-border);
}

.api-widget__title {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  font-size: var(--fs-sm);
  font-weight: 600;
}

.api-widget__badge {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 0.2em 0.6em;
  border-radius: 100px;
  background: var(--c-green);
  color: #fff;
  letter-spacing: 0.05em;
  animation: pulse-badge 2s ease-in-out infinite;
}

.api-widget__badge--mock {
  background: var(--c-yellow);
  color: #000;
  animation: none;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.api-widget__body {
  padding: var(--sp-lg);
  min-height: 200px;
}

.api-widget__loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-md);
  height: 160px;
  color: var(--c-text-muted);
  font-size: var(--fs-sm);
}

.api-widget__spinner {
  width: 28px;
  height: 28px;
  border: 2px solid var(--c-border);
  border-top-color: var(--c-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.api-widget__footer {
  padding: var(--sp-sm) var(--sp-lg);
  border-top: 1px solid var(--c-border);
  background: var(--c-surface);
}

.api-widget__footer code {
  font-size: var(--fs-xs);
  background: none;
  border: none;
  padding: 0;
  color: var(--c-text-dim);
}

/* Weather widget rendered state */
.weather-data {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--sp-md) var(--sp-lg);
  align-items: center;
}

.weather-data__temp {
  font-size: var(--fs-2xl);
  font-weight: 900;
  font-family: var(--f-mono);
  background: linear-gradient(135deg, var(--c-yellow), var(--c-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  grid-row: span 2;
}

.weather-data__label {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
}

.weather-data__value {
  font-size: var(--fs-sm);
  font-weight: 600;
}

.weather-data__details {
  grid-column: span 2;
  display: flex;
  gap: var(--sp-lg);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--c-border);
}

.weather-detail {
  text-align: center;
}

.weather-detail__value {
  font-family: var(--f-mono);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--c-cyan);
}

.weather-detail__label {
  font-size: var(--fs-xs);
  color: var(--c-text-dim);
}

/* GitHub commit feed */
.commit-feed {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  max-height: 300px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--c-accent) transparent;
}

.commit-item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-md);
  padding: var(--sp-sm) var(--sp-md);
  border-radius: var(--border-radius);
  background: var(--c-surface);
  border: 1px solid transparent;
  transition: border-color var(--duration-fast), background var(--duration-fast);
  animation: commit-enter 0.4s var(--ease-out) both;
}

@keyframes commit-enter {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
}

.commit-item:hover {
  border-color: var(--c-border);
  background: var(--c-bg-elevated);
}

.commit-item__hash {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-accent);
  flex-shrink: 0;
}

.commit-item__msg {
  font-size: var(--fs-xs);
  color: var(--c-text-muted);
  line-height: 1.4;
}

.commit-item__time {
  font-family: var(--f-mono);
  font-size: 0.65rem;
  color: var(--c-text-dim);
  flex-shrink: 0;
  margin-left: auto;
}

/* API error state */
.api-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-md);
  height: 160px;
  text-align: center;
}

.api-error__icon {
  color: var(--c-red);
}

.api-error__msg {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
}

.api-error__retry {
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  padding: 0.4em 1em;
  border: 1px solid var(--c-border);
  border-radius: 100px;
  color: var(--c-text-muted);
  transition: border-color var(--duration-fast), color var(--duration-fast);
}

.api-error__retry:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* ------------------------------------------------
   TECH SHOWCASE SECTION
   ------------------------------------------------ */
.tech__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-xl);
}

@media (min-width: 640px) {
  .tech__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .tech__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tech-card {
  padding: var(--sp-2xl);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--border-radius-lg);
  position: relative;
  overflow: hidden;
  transition: border-color var(--duration-base),
              transform var(--duration-base) var(--ease-spring);
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-out);
}

.tech-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-4px);
}

.tech-card:hover::before {
  transform: scaleX(1);
}

.tech-card__icon {
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  background: var(--c-accent-glow);
  border-radius: var(--border-radius);
  color: var(--c-accent);
  margin-bottom: var(--sp-lg);
}

.tech-card__name {
  font-size: var(--fs-md);
  font-weight: 700;
  margin-bottom: var(--sp-md);
}

.tech-card__reason {
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  line-height: 1.7;
}

.tech-card__badge {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: var(--fs-xs);
  color: var(--c-accent);
  margin-top: var(--sp-lg);
  padding: 0.2em 0.6em;
  border: 1px solid var(--c-accent-glow);
  border-radius: 100px;
  letter-spacing: 0.05em;
}

/* ------------------------------------------------
   CONTACT SECTION
   ------------------------------------------------ */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3xl);
}

@media (min-width: 768px) {
  .contact__grid {
    grid-template-columns: 1fr 1.2fr;
    align-items: start;
  }
}

.contact__tagline {
  font-size: var(--fs-xl);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: var(--sp-xl);
}

.contact__link {
  font-size: var(--fs-md);
  color: var(--c-accent);
  font-weight: 500;
  transition: color var(--duration-fast);
  text-decoration: underline;
  text-decoration-color: var(--c-accent-glow);
  text-underline-offset: 4px;
}

.contact__link:hover {
  color: var(--c-accent-light);
}

/* Form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}

.form-label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--c-text);
}

.form-input {
  font-family: var(--f-sans);
  font-size: var(--fs-base);
  color: var(--c-text);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--border-radius);
  padding: 0.85rem 1rem;
  transition: border-color var(--duration-base), box-shadow var(--duration-base);
  outline: none;
}

.form-input::placeholder {
  color: var(--c-text-dim);
}

.form-input:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px var(--c-accent-glow);
}

.form-input--textarea {
  resize: vertical;
  min-height: 120px;
}

/* Validation states */
.form-group:has(.form-input:user-invalid) .form-input {
  border-color: var(--c-red);
}

.form-group:has(.form-input:user-invalid) .form-error {
  display: block;
}

.form-group:has(.form-input:user-valid) .form-input {
  border-color: var(--c-green);
}

.form-error {
  display: none;
  font-size: var(--fs-xs);
  color: var(--c-red);
}

/* Success state */
.contact__success {
  position: relative;
  text-align: center;
  padding: var(--sp-xl);
  background: color-mix(in srgb, var(--c-green) 10%, transparent);
  border: 1px solid var(--c-green);
  border-radius: var(--border-radius-lg);
  font-weight: 500;
  color: var(--c-green);
  animation: success-enter 0.5s var(--ease-spring);
}

@keyframes success-enter {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.95);
  }
}

#confetti-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* ------------------------------------------------
   FOOTER
   ------------------------------------------------ */
.footer {
  border-top: 1px solid var(--c-border);
  padding: var(--sp-xl) 0;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-md);
}

.footer__copy {
  font-size: var(--fs-xs);
  color: var(--c-text-dim);
}

.footer__opus {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-xs);
  font-size: var(--fs-sm);
  color: var(--c-text-muted);
  padding: var(--sp-xs) var(--sp-md);
  border: 1px solid var(--c-border);
  border-radius: 100px;
  transition: border-color var(--duration-base),
              color var(--duration-base),
              background var(--duration-base);
}

.footer__opus:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: var(--c-accent-glow);
}

.footer__opus-label {
  font-size: var(--fs-xs);
  color: var(--c-text-dim);
}

.footer__opus-name {
  font-weight: 600;
}

/* ------------------------------------------------
   REVEAL ANIMATION CLASSES (set by GSAP)
   ------------------------------------------------ */
.reveal-text {
  opacity: 0;
  transform: translateY(30px);
}

/* ------------------------------------------------
   REDUCED MOTION
   ------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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

  .scroll-progress {
    animation: none;
    transform: scaleX(0);
  }

  .hero__canvas {
    display: none;
  }
}

/* ------------------------------------------------
   PRINT STYLES
   ------------------------------------------------ */
@media print {
  .cursor,
  .loader,
  .scroll-progress,
  .hero__canvas,
  .nav__burger,
  .theme-toggle,
  .glitch-block {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section {
    page-break-inside: avoid;
  }
}