/* ============================================================
   XZAR-X LANDING PAGE — PREMIUM DARK / LIGHT THEME ENGINE
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ============================================================
   1.  DESIGN TOKENS  (CSS Custom Properties)
   ============================================================ */

/* --- Light Mode (default) --- */
:root {
  /* palette */
  --bg-primary:    #f0f2f8;
  --bg-secondary:  #f8f9fd;
  --bg-card:       rgba(255, 255, 255, .82);
  --text-primary:  #1e293b;
  --text-secondary:#64748b;
  --accent:        #6366f1;
  --accent-hover:  #4f46e5;
  --accent-glow:   rgba(99, 102, 241, .22);
  --accent-secondary: #a78bfa;
  --border-color:  rgba(148, 163, 184, .18);

  /* typography */
  --font-family: 'Inter', 'Segoe UI', sans-serif;

  /* shapes */
  --radius:      18px;
  --radius-sm:   12px;
  --radius-pill: 50px;

  /* shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.04),
               0 4px 12px rgba(99,102,241,.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,.06),
               0 8px 24px rgba(99,102,241,.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.08),
               0 16px 48px rgba(99,102,241,.10);

  /* misc */
  --transition:    .4s cubic-bezier(.4,0,.2,1);
  --header-bg:     rgba(255,255,255,.72);
  --header-blur:   20px;
  --toggle-bg:     #e2e8f0;
  --toggle-dot:    #6366f1;

  /* gradients */
  --card-gradient: linear-gradient(
    135deg,
    rgba(99,102,241,.04),
    rgba(167,139,250,.04)
  );
  --hero-gradient: linear-gradient(
    160deg,
    #f0f2f8 0%,
    #e8eaf6 40%,
    #ede9fe 70%,
    #f0f2f8 100%
  );
}

/* --- Dark Mode — Premium Crypto/Fintech --- */
[data-theme="dark"] {
  --bg-primary:    #0b0d0f;
  --bg-secondary:  #101214;
  --bg-card:       #151819;
  --text-primary:  #eef1f6;
  --text-secondary:#7a8494;
  --accent:        #b4f82e;
  --accent-hover:  #c8ff52;
  --accent-glow:   rgba(180,248,46,.18);
  --accent-secondary: #8bc34a;
  --border-color:  rgba(255,255,255,.06);

  --radius:    16px;
  --radius-sm: 12px;

  --shadow-sm: 0 1px 4px rgba(0,0,0,.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,.35);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.4);

  --header-bg:    rgba(11,13,15,.85);
  --header-blur:  18px;
  --toggle-bg:    #1e2224;
  --toggle-dot:   #b4f82e;
}

/* ============================================================
   2.  RESET & BASE
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin:  0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
  position: relative;
  /* Hide default cursor — JS custom cursor takes over */
  cursor: none;
}

/* Fallback: restore cursor on touch devices via JS class */
body.touch-device {
  cursor: auto;
}

/* ---- Pulsating edge glow ---- */
/*
  Light mode: unchanged (subtle, doesn't overlap content)
  Dark mode:  REDUCED — narrower blur, lower opacity
              to prevent content occlusion
*/
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  box-shadow: inset 0 0 80px 15px rgba(48,51,230,.25);
  animation: edgeGlow 3s ease-in-out infinite;
  transition: box-shadow var(--transition);
}

/* Dark mode — reduced glow so content isn't masked */
[data-theme="dark"] body::after {
  box-shadow: inset 0 0 40px 6px rgba(180,248,46,.10);
  animation: edgeGlowDark 3s ease-in-out infinite;
}

@keyframes edgeGlow {
  0%, 100% {
    box-shadow: inset 0 0 80px 15px rgba(48,51,230,.25);
  }
  50% {
    box-shadow: inset 0 0 120px 30px rgba(48,51,230,.4);
  }
}

@keyframes edgeGlowDark {
  /* Much narrower spread — stays near the actual border */
  0%, 100% {
    box-shadow: inset 0 0 40px 6px rgba(180,248,46,.10);
  }
  50% {
    box-shadow: inset 0 0 55px 10px rgba(180,248,46,.17);
  }
}

/* Soft gradient background — light mode */
[data-theme="light"] body {
  background: var(--hero-gradient);
}

/* Subtle dot pattern overlay — dark mode */
[data-theme="dark"] body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(
    rgba(255,255,255,.03) 1px,
    transparent 1px
  );
  background-size: 24px 24px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color .25s;
}

a:hover {
  color: var(--accent-hover);
}

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

ul {
  list-style: none;
}

/* ============================================================
   2b. NOISE / FILM GRAIN OVERLAY
       Very subtle SVG fractalNoise tiled over everything.
       Mix-blend-mode overlay keeps it non-destructive.
   ============================================================ */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998; /* below edge glow */
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22200%22%20height%3D%22200%22%3E%3Cfilter%20id%3D%22n%22%3E%3CfeTurbulence%20type%3D%22fractalNoise%22%20baseFrequency%3D%220.85%22%20numOctaves%3D%224%22%20stitchTiles%3D%22stitch%22%2F%3E%3C%2Ffilter%3E%3Crect%20width%3D%22200%22%20height%3D%22200%22%20filter%3D%22url(%23n)%22%20opacity%3D%220.5%22%2F%3E%3C%2Fsvg%3E");
  background-size: 200px 200px;
}

/* ============================================================
   3.  LAYOUT UTILITIES
   ============================================================ */
.container {
  width: min(90%, 1120px);
  margin-inline: auto;
}

section {
  padding: 5rem 0;
  position: relative;
  z-index: 1;
}

/* ============================================================
   4.  CUSTOM CURSOR
       Dot follows mouse instantly.
       Ring follows with a lag (handled in JS via rAF).
       Hidden on touch devices.
   ============================================================ */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 10000;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: opacity .3s ease;
}

/* Small filled dot */
.cursor-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
}

/* Larger hollow ring */
.cursor-ring {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--accent);
  opacity: .6;
  transition:
    width .2s ease,
    height .2s ease,
    opacity .3s ease,
    border-color var(--transition);
}

/* Hover state — ring expands, dot shrinks */
.cursor-dot--hover {
  width: 5px;
  height: 5px;
  opacity: .7;
}

.cursor-ring--hover {
  width: 44px;
  height: 44px;
  opacity: .85;
  border-color: var(--accent);
  mix-blend-mode: difference;
}

/* Hide on touch */
.touch-device .cursor-dot,
.touch-device .cursor-ring {
  display: none;
}

/* ============================================================
   4b. SCROLL PROGRESS BAR
       Thin accent line at bottom of header.
   ============================================================ */
.scroll-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(
    90deg,
    var(--accent),
    var(--accent-secondary)
  );
  z-index: 1001;
  transition: width .05s linear;
}

/* ============================================================
   4c. HEADER / NAV
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--header-bg);
  backdrop-filter: blur(var(--header-blur));
  -webkit-backdrop-filter: blur(var(--header-blur));
  border-bottom: 1px solid var(--border-color);
  transition:
    background var(--transition),
    border-color var(--transition);
}

/* Gradient accent line — light mode */
[data-theme="light"] .header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--accent),
    var(--accent-secondary),
    transparent
  );
  opacity: .5;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  flex-wrap: wrap;
  gap: 0;
}

/* ---- Logo ---- */
.logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-primary);
  transition: color var(--transition);
}

.logo__img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 8px;
  transition: transform var(--transition);
}

.logo:hover .logo__img {
  transform: scale(1.08) rotate(-3deg);
}

/* ---- Header Controls ---- */
.header__controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* ---- Language Toggle ---- */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: .25rem;
  background: var(--toggle-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  padding: .3rem .45rem;
  cursor: none;
  transition: all var(--transition);
  font-size: 1.15rem;
  line-height: 1;
}

.lang-toggle:hover {
  box-shadow: var(--shadow-sm);
}

.lang-toggle__flag {
  opacity: .4;
  transition: opacity .3s, transform .3s;
  display: inline-block;
}

.lang-toggle__flag.active {
  opacity: 1;
  transform: scale(1.15);
}

/* ---- Theme Toggle ---- */
.theme-toggle {
  display: flex;
  align-items: center;
  gap: .65rem;
  cursor: none;
  -webkit-user-select: none;
  user-select: none;
}

.theme-toggle__label {
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.theme-toggle__track {
  width: 52px;
  height: 28px;
  background: var(--toggle-bg);
  border-radius: var(--radius-pill);
  position: relative;
  transition: background var(--transition);
}

.theme-toggle__track::after {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  top: 3px;
  left: 3px;
  border-radius: 50%;
  background: var(--toggle-dot);
  transition:
    transform var(--transition),
    background var(--transition),
    box-shadow var(--transition);
}

[data-theme="dark"] .theme-toggle__track::after {
  transform: translateX(24px);
  box-shadow: 0 0 8px rgba(180,248,46,.4);
}

/* ============================================================
   4d. MAIN NAVIGATION
   ============================================================ */
.nav {
  display: flex;
  align-items: center;
  position: relative;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: .25rem;
  list-style: none;
}

/* Base nav link */
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: .4rem 1.05rem;
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  overflow: hidden;
  transition:
    color var(--transition),
    border-color var(--transition),
    background var(--transition),
    box-shadow var(--transition),
    transform .18s ease;
  cursor: none;
}

/* Shimmer sweep — wow effect on hover */
.nav__link::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 35%,
    rgba(255,255,255,.18) 50%,
    transparent 65%
  );
  transform: translateX(-130%);
  transition: transform .55s ease;
  pointer-events: none;
}

.nav__link:hover::before {
  transform: translateX(130%);
}

.nav__link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px var(--accent-glow);
}

/* Active state (current section in view) */
.nav__link.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
  animation: navPulse 2.8s ease-in-out infinite;
}

[data-theme="dark"] .nav__link.active {
  color: #0b0d0f;
}

@keyframes navPulse {
  0%, 100% { box-shadow: 0 0 12px var(--accent-glow); }
  50% {
    box-shadow:
      0 0 20px var(--accent-glow),
      0 0 38px var(--accent-glow);
  }
}

/* ---- Hamburger ---- */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 6px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: none;
  transition:
    border-color var(--transition),
    background var(--transition);
}

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

.nav__hamburger-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition:
    transform .35s cubic-bezier(.4,0,.2,1),
    opacity .25s ease,
    background var(--transition);
}

/* Bars → X when open */
.nav__hamburger[aria-expanded="true"]
  .nav__hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__hamburger[aria-expanded="true"]
  .nav__hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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

/* ============================================================
   5.  HERO SECTION
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 70px;
  position: relative;
  overflow: hidden;
}

/* Matrix / particles canvas */
.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
}

[data-theme="dark"] .hero__canvas {
  opacity: 1;
}

.hero__content {
  position: relative;
  z-index: 2;
}

/* ---- Page load stagger — hero elements ---- */
@keyframes heroStagger {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero__badge {
  display: inline-block;
  padding: .35rem 1.1rem;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: var(--radius-pill);
  margin-bottom: 1.6rem;
  transition: all var(--transition);
  /* Stagger delay: 1st element */
  animation: heroStagger .65s .1s cubic-bezier(.4,0,.2,1) both;
}

.hero__title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  transition: all var(--transition);
  /* Stagger delay: 2nd element */
  animation: heroStagger .7s .28s cubic-bezier(.4,0,.2,1) both;
}

.hero__title .highlight {
  color: var(--accent);
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: 2.4rem;
  transition: color var(--transition);
  /* Typewriter handles this element's reveal — no stagger here */
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .85rem 2.2rem;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-family);
  color: #fff;
  background: linear-gradient(
    135deg,
    var(--accent),
    var(--accent-secondary, var(--accent))
  );
  border: none;
  border-radius: var(--radius-pill);
  cursor: none;
  transition: all var(--transition);
  box-shadow: 0 4px 18px var(--accent-glow);
  /* Stagger delay: 4th element */
  animation: heroStagger .65s .62s cubic-bezier(.4,0,.2,1) both;
}

.hero__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px var(--accent-glow);
  color: #fff;
}

[data-theme="dark"] .hero__cta {
  color: #0b0d0f;
  background: var(--accent);
  box-shadow: 0 4px 24px rgba(180,248,46,.25);
}

[data-theme="dark"] .hero__cta:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 32px rgba(180,248,46,.35);
  color: #0b0d0f;
}

/* Animated grid background — dark mode */
.hero__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  opacity: 0;
  transition: opacity var(--transition);
}

[data-theme="dark"] .hero__grid {
  opacity: 1;
}

.hero__grid::before {
  content: '';
  position: absolute;
  inset: -50%;
  background-image:
    linear-gradient(
      rgba(180,248,46,.03) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      rgba(180,248,46,.03) 1px,
      transparent 1px
    );
  background-size: 80px 80px;
  animation: gridMove 30s linear infinite;
}

@keyframes gridMove {
  to { transform: translate(80px, 80px); }
}

/* Floating orbs */
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  z-index: 0;
  transition: opacity var(--transition);
}

.hero__orb--1 {
  width: 450px;
  height: 450px;
  background: rgba(99,102,241,.18);
  top: 5%;
  left: -8%;
  animation: orbFloat1 8s ease-in-out infinite;
}

.hero__orb--2 {
  width: 360px;
  height: 360px;
  background: rgba(167,139,250,.16);
  bottom: 5%;
  right: -5%;
  animation: orbFloat2 10s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0); }
  50%       { transform: translate(30px, -20px); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0); }
  50%       { transform: translate(-25px, 15px); }
}

[data-theme="dark"] .hero__orb--1 {
  background: rgba(180,248,46,.06);
}

[data-theme="dark"] .hero__orb--2 {
  background: rgba(180,248,46,.04);
}

/* ============================================================
   5b. ABOUT ME SECTION
   ============================================================ */
.about {
  background: var(--bg-secondary);
  transition: background var(--transition);
}

.about__layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  align-items: start;
}

.about__photo-wrapper {
  position: sticky;
  top: 100px;
}

.about__photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius);
  border: 3px solid var(--accent);
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
}

.about__photo:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-lg);
}

.about__text {
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.about__intro {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--text-primary);
  transition: color var(--transition);
}

.about__subtitle {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
  margin-top: .6rem;
  transition: color var(--transition);
}

.about__list {
  display: flex;
  flex-direction: column;
  gap: .8rem;
  list-style: none;
}

.about__list-item {
  font-size: .95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  padding: .9rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.about__list-item:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.about__list-item strong {
  color: var(--text-primary);
  transition: color var(--transition);
}

.about__cta-text {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin-top: .5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  transition: all var(--transition);
}

@media (max-width: 768px) {
  .about__layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about__photo-wrapper {
    position: static;
    max-width: 220px;
    margin-inline: auto;
  }
}

/* ============================================================
   5c. STATS STRIP
       Horizontal band between About and Services.
       Animated counters via JS IntersectionObserver.
   ============================================================ */
.stats {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 3rem 0;
  transition:
    background var(--transition),
    border-color var(--transition);
}

[data-theme="dark"] .stats {
  background: var(--bg-card);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.stats__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
  padding: 1.4rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  transition: all var(--transition);
}

.stats__item:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stats__number-wrap {
  display: flex;
  align-items: baseline;
  gap: .15rem;
  line-height: 1;
}

.stats__num {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--accent);
  transition: color var(--transition);
  /* Prevent layout shift during counter animation */
  display: inline-block;
  min-width: 2ch;
}

.stats__suffix {
  font-size: clamp(1.1rem, 3vw, 1.6rem);
  font-weight: 700;
  color: var(--accent);
  transition: color var(--transition);
}

.stats__label {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

@media (max-width: 360px) {
  .stats__grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   6.  SECTION HEADING (shared)
   ============================================================ */
.section-heading {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-heading__tag {
  display: inline-block;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .5rem;
  transition: color var(--transition);
}

.section-heading__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  transition: all var(--transition);
}

/* ============================================================
   7.  SERVICES SECTION
   ============================================================ */
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.6rem;
  /* Perspective for 3D tilt effect (JS-driven) */
  perspective: 1200px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2.4rem 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  /* Smooth tilt reset handled by JS */
  will-change: transform;
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
}

/* Disable default CSS translateY when tilt JS is active */
.service-card.tilt-enabled:hover {
  transform: none;
}

[data-theme="dark"] .service-card:hover {
  border-color: rgba(180,248,46,.15);
}

/* Numbered label */
.service-card__number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-secondary);
  opacity: .35;
  margin-bottom: .8rem;
  transition: all var(--transition);
}

[data-theme="dark"] .service-card__number {
  opacity: .5;
}

/* Featured card — dark mode */
[data-theme="dark"] .service-card--featured {
  background: var(--accent);
  border-color: var(--accent);
}

[data-theme="dark"] .service-card--featured .service-card__number,
[data-theme="dark"] .service-card--featured .service-card__title,
[data-theme="dark"] .service-card--featured .service-card__desc {
  color: #0b0d0f;
}

[data-theme="dark"] .service-card--featured .service-card__number {
  opacity: .4;
}

[data-theme="dark"] .service-card--featured .service-card__icon {
  filter: none;
}

[data-theme="dark"] .service-card--featured:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

/* Featured card — light mode */
[data-theme="light"] .service-card--featured {
  background: linear-gradient(
    135deg,
    var(--accent),
    var(--accent-secondary)
  );
  border-color: transparent;
}

[data-theme="light"] .service-card--featured .service-card__number,
[data-theme="light"] .service-card--featured .service-card__title,
[data-theme="light"] .service-card--featured .service-card__desc {
  color: #fff;
}

[data-theme="light"] .service-card--featured .service-card__number {
  opacity: .5;
}

.service-card__icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  display: inline-block;
  transition: filter var(--transition);
}

.service-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: .6rem;
  transition: all var(--transition);
}

.service-card__desc {
  font-size: .92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  transition: color var(--transition);
}

/* ============================================================
   8.  LINKS / CONNECT SECTION
   ============================================================ */
.links {
  background: var(--bg-secondary);
  transition: background var(--transition);
}

.links__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.6rem;
}

.link-card {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1.6rem 1.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition);
  cursor: none;
}

.link-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  color: var(--accent);
}

[data-theme="dark"] .link-card:hover {
  border-color: rgba(180,248,46,.15);
}

.link-card__icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.link-card__info {
  display: flex;
  flex-direction: column;
}

.link-card__name {
  font-weight: 700;
  font-size: 1.05rem;
}

.link-card__url {
  font-size: .8rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 180px;
}

/* ============================================================
   8b. PROJECTS SECTION
   ============================================================ */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.6rem;
  /* Perspective for 3D tilt effect (JS-driven) */
  perspective: 1200px;
}

.project-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.8rem 1.8rem 2rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  cursor: none;
  will-change: transform;
}

/* Bottom accent line */
.project-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--accent),
    var(--accent-secondary)
  );
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s ease;
}

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

.project-card:hover {
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
}

/* Disable default CSS translateY when tilt JS is active */
.project-card.tilt-enabled:hover {
  transform: none;
}

[data-theme="dark"] .project-card:hover {
  border-color: rgba(180,248,46,.15);
}

.project-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: .9rem;
}

.project-card__icon {
  font-size: 1.6rem;
  transition: filter var(--transition);
}

.project-card__lang {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: .2rem .7rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.project-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: .45rem;
  transition: all var(--transition);
}

.project-card__desc {
  font-size: .88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  transition: color var(--transition);
}

/* ============================================================
   8c. HIRE ME CTA
   ============================================================ */
.hire {
  text-align: center;
  background: var(--bg-secondary);
  transition: background var(--transition);
  border-top: 1px solid var(--border-color);
}

.hire__content {
  max-width: 620px;
  margin-inline: auto;
}

.hire__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  margin-bottom: .8rem;
  transition: all var(--transition);
}

.hire__subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  transition: color var(--transition);
}

.hire__btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: 1rem 2.8rem;
  font-size: 1.15rem;
  font-weight: 700;
  font-family: var(--font-family);
  color: #fff;
  background: linear-gradient(
    135deg,
    var(--accent),
    var(--accent-secondary)
  );
  border: none;
  border-radius: var(--radius-pill);
  text-decoration: none;
  cursor: none;
  transition: all var(--transition);
  box-shadow: 0 6px 24px var(--accent-glow);
}

.hire__btn:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 10px 36px var(--accent-glow);
  color: #fff;
}

[data-theme="dark"] .hire__btn {
  background: var(--accent);
  color: #0b0d0f;
  box-shadow: 0 4px 24px rgba(180,248,46,.25);
}

[data-theme="dark"] .hire__btn:hover {
  background: var(--accent-hover);
  color: #0b0d0f;
  box-shadow: 0 6px 32px rgba(180,248,46,.35);
}

/* ============================================================
   CONTACT FORM
   ============================================================ */
.contact {
  padding: 5rem 0;
}

.contact__form {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.contact__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
}

@media (max-width: 600px) {
  .contact__row {
    grid-template-columns: 1fr;
  }
}

.contact__field {
  display: flex;
  flex-direction: column;
  gap: .45rem;
}

.contact__field label {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.contact__field input,
.contact__field textarea {
  width: 100%;
  padding: .85rem 1.1rem;
  font-family: var(--font-family);
  font-size: .95rem;
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  cursor: auto; /* Restore default cursor for inputs */
  transition:
    border-color var(--transition),
    box-shadow var(--transition),
    background var(--transition);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

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

[data-theme="dark"] .contact__field input,
[data-theme="dark"] .contact__field textarea {
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.08);
}

[data-theme="dark"] .contact__field input:focus,
[data-theme="dark"] .contact__field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(180,248,46,.12);
}

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

.contact__btn {
  align-self: center;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .9rem 2.4rem;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: .5px;
  border: none;
  border-radius: var(--radius-pill);
  cursor: none;
  transition: all var(--transition);
  margin-top: .6rem;
}

[data-theme="light"] .contact__btn {
  background: linear-gradient(
    135deg,
    var(--accent),
    var(--accent-secondary)
  );
  color: #fff;
  box-shadow: 0 4px 16px rgba(99,102,241,.3);
}

[data-theme="light"] .contact__btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(99,102,241,.4);
}

[data-theme="dark"] .contact__btn {
  background: var(--accent);
  color: #0b0d0f;
  box-shadow: 0 4px 16px rgba(180,248,46,.2);
}

[data-theme="dark"] .contact__btn:hover {
  transform: translateY(-2px);
  background: var(--accent-hover);
  box-shadow: 0 6px 24px rgba(180,248,46,.3);
}

.contact__status {
  text-align: center;
  font-size: .9rem;
  font-weight: 500;
  min-height: 1.4em;
  margin-top: .4rem;
  transition: color var(--transition);
}

.contact__status--ok  { color: #22c55e; }
.contact__status--err { color: #ef4444; }

.contact__btn:disabled {
  opacity: .6;
  cursor: not-allowed;
  transform: none !important;
}

/* ============================================================
   9.  FOOTER
   ============================================================ */
.footer {
  text-align: center;
  padding: 2.5rem 0;
  font-size: .82rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-color);
  transition: all var(--transition);
}

/* ============================================================
   10. BACK TO TOP BUTTON
       Bottom-right corner. Appears after 300px scroll.
       SVG ring shows scroll progress.
   ============================================================ */
.back-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 998;
  width: 52px;
  height: 52px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    opacity .35s ease,
    transform .35s ease,
    box-shadow var(--transition),
    background var(--transition);
  /* Hidden by default */
  opacity: 0;
  transform: translateY(12px) scale(.9);
  pointer-events: none;
  box-shadow: var(--shadow-md);
}

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

.back-top:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-lg);
  background: var(--accent);
}

.back-top:hover .back-top__arrow {
  color: #fff;
}

[data-theme="dark"] .back-top:hover {
  background: var(--accent);
}

[data-theme="dark"] .back-top:hover .back-top__arrow {
  color: #0b0d0f;
}

/* SVG ring */
.back-top__ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg); /* Start from top */
}

.back-top__ring-track {
  fill: none;
  stroke: var(--border-color);
  stroke-width: 2;
}

.back-top__ring-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  /* circumference of r=16: 2π×16 ≈ 100.53 */
  stroke-dasharray: 100.53;
  stroke-dashoffset: 100.53;
  transition: stroke-dashoffset .08s linear;
}

.back-top__arrow {
  position: relative;
  z-index: 1;
  font-size: 1.1rem;
  color: var(--accent);
  line-height: 1;
  transition: color var(--transition);
}

/* ============================================================
   10b. CONTENT TONE TRANSITION
   ============================================================ */
[data-i18n] {
  transition: opacity .3s ease;
}

body.theme-transitioning [data-i18n] {
  opacity: 0;
}

/* ============================================================
   11. GLITCH EFFECT — RESTORED AND ACTIVE
       Fires automatically ~every 8s for 0.5s.
       Triggered by .glitch-active class (added in JS).
   ============================================================ */
.glitch {
  position: relative;
  display: inline-block;
}

.glitch::before,
.glitch::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* Hidden by default — only show during active glitch */
  opacity: 0;
}

.glitch::before {
  color: var(--accent);
  clip-path: polygon(0 15%, 100% 15%, 100% 40%, 0 40%);
}

.glitch::after {
  clip-path: polygon(0 60%, 100% 60%, 100% 85%, 0 85%);
}

/* Light mode: magenta shift */
[data-theme="light"] .glitch::after {
  color: #e040fb;
}

/* Dark mode: lime shift */
[data-theme="dark"] .glitch::after {
  color: rgba(180,248,46,.85);
}

/* Active glitch — JS adds this class */
.glitch.glitch-active::before {
  animation: glitchBefore .45s steps(1) forwards;
}

.glitch.glitch-active::after {
  animation: glitchAfter .45s steps(1) forwards;
}

@keyframes glitchBefore {
  0%  { opacity:0; transform:translateX(0); }
  10% { opacity:1; transform:translateX(-4px);
        clip-path: polygon(0 12%,100% 12%,100% 38%,0 38%); }
  20% { opacity:0; }
  30% { opacity:1; transform:translateX(3px);
        clip-path: polygon(0 48%,100% 48%,100% 60%,0 60%); }
  40% { opacity:0; }
  50% { opacity:1; transform:translateX(-3px);
        clip-path: polygon(0 22%,100% 22%,100% 44%,0 44%); }
  60% { opacity:0; }
  70% { opacity:1; transform:translateX(4px);
        clip-path: polygon(0 5%, 100% 5%, 100% 25%,0 25%); }
  80% { opacity:0; }
  100%{ opacity:0; transform:translateX(0); }
}

@keyframes glitchAfter {
  0%  { opacity:0; transform:translateX(0); }
  10% { opacity:1; transform:translateX(4px);
        clip-path: polygon(0 58%,100% 58%,100% 82%,0 82%); }
  20% { opacity:0; }
  30% { opacity:1; transform:translateX(-3px);
        clip-path: polygon(0 70%,100% 70%,100% 90%,0 90%); }
  40% { opacity:0; }
  50% { opacity:1; transform:translateX(3px);
        clip-path: polygon(0 62%,100% 62%,100% 80%,0 80%); }
  60% { opacity:0; }
  70% { opacity:1; transform:translateX(-4px);
        clip-path: polygon(0 75%,100% 75%,100% 95%,0 95%); }
  80% { opacity:0; }
  100%{ opacity:0; transform:translateX(0); }
}

/* ============================================================
   12. SCROLL REVEAL (JS-driven)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s ease, transform .7s ease;
}

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

/* ============================================================
   13. RESPONSIVE BREAKPOINTS
   ============================================================ */
@media (max-width: 768px) {
  section {
    padding: 3.5rem 0;
  }

  /* Mobile nav */
  .nav__hamburger {
    display: flex;
  }

  .nav__list {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    transform: none;
    width: max(220px, 70vw);
    flex-direction: column;
    align-items: stretch;
    background: var(--header-bg);
    backdrop-filter: blur(var(--header-blur));
    -webkit-backdrop-filter: blur(var(--header-blur));
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: .7rem .6rem;
    gap: .35rem;
    z-index: 999;
    box-shadow: var(--shadow-lg);
  }

  .nav__list.open {
    display: flex;
    animation: mobileNavIn .28s cubic-bezier(.4,0,.2,1);
  }

  .nav__link {
    width: 100%;
    justify-content: center;
    padding: .65rem 1rem;
    font-size: .82rem;
  }

  @keyframes mobileNavIn {
    from {
      opacity: 0;
      transform: translateY(-8px) scale(.97);
    }
    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }

  .hero__title {
    font-size: clamp(1.8rem, 7vw, 2.6rem);
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .projects__grid {
    grid-template-columns: 1fr;
  }

  .links__grid {
    grid-template-columns: 1fr;
  }

  .header .container {
    height: auto;
    padding-block: .45rem;
    row-gap: .4rem;
    grid-template-columns: 1fr auto;
    display: grid;
  }

  /* Row 1: logo (left) + lang-toggle (right) */
  .logo {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
  }

  .lang-toggle {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }

  /* Row 2: nav (left) + theme-toggle (right) */
  .nav {
    grid-column: 1;
    grid-row: 2;
    justify-self: start;
  }

  .header__controls {
    grid-column: 2;
    grid-row: 2;
    justify-self: end;
  }

  .hero {
    padding-top: 110px;
  }

  /* Back to top — smaller on mobile */
  .back-top {
    bottom: 1.2rem;
    right: 1.2rem;
    width: 44px;
    height: 44px;
  }
}

@media (max-width: 480px) {
  .hero__cta {
    width: 100%;
    justify-content: center;
  }

  .service-card {
    padding: 1.8rem 1.4rem;
  }

  .hire__btn {
    width: 100%;
    justify-content: center;
  }
}

/* Touch devices — restore default cursor everywhere */
@media (hover: none) {
  body,
  a,
  button,
  [role="button"],
  .project-card,
  .service-card,
  .link-card,
  .lang-toggle,
  .theme-toggle,
  .nav__link,
  .nav__hamburger,
  .hire__btn,
  .contact__btn,
  .back-top {
    cursor: auto;
  }
}