/* ============================================================
   ANTIGRAVITY — style.css
   A dark, futuristic design system
   ============================================================ */

/* ── 1. CSS Custom Properties (Design Tokens) ─────────────── */
:root {
  /* Colors */
  --clr-bg:          #050810;
  --clr-surface:     #0d1117;
  --clr-surface-2:   #111827;
  --clr-border:      rgba(255, 255, 255, 0.07);
  --clr-border-glow: rgba(99, 102, 241, 0.35);

  --clr-white:       #f8fafc;
  --clr-muted:       #64748b;
  --clr-accent-1:    #6366f1; /* indigo */
  --clr-accent-2:    #a855f7; /* purple */
  --clr-accent-3:    #06b6d4; /* cyan */

  /* Gradient */
  --gradient-primary: linear-gradient(135deg, var(--clr-accent-1), var(--clr-accent-2));
  --gradient-glow:    radial-gradient(ellipse at center, rgba(99,102,241,0.15) 0%, transparent 70%);

  /* Typography */
  --font-sans: 'Outfit', system-ui, sans-serif;
  --font-mono: 'Space Mono', monospace;

  /* Spacing */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  8rem;

  /* Layout */
  --container-max: 1200px;
  --container-pad: 1.5rem;
  --radius-sm:     0.5rem;
  --radius-md:     1rem;
  --radius-lg:     1.5rem;
  --radius-pill:   9999px;

  /* Transitions */
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --transition:  0.3s var(--ease-smooth);

  /* Shadows */
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.25);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* ── 2. Reset & Base ──────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--clr-bg);
  color: var(--clr-white);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  overflow-x: hidden;
}

img, video, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ── 3. Layout Utilities ──────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--space-xl);
}

.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-accent-1);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-md);
}

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

/* ── 4. Gradient Text ─────────────────────────────────────── */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── 5. Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: var(--transition);
}

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

.btn--lg { padding: 0.85rem 2rem; font-size: 1rem; }

.btn--primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(99, 102, 241, 0.6);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--clr-white);
  border: 1px solid var(--clr-border);
  backdrop-filter: blur(8px);
}

.btn--ghost:hover {
  border-color: var(--clr-border-glow);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--clr-accent-1);
  border: 1px solid var(--clr-accent-1);
}

.btn--outline:hover {
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

/* ── 6. Navigation ────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding-block: 1.25rem;
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(5, 8, 16, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--clr-border);
  padding-block: 0.85rem;
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  margin-right: auto;
}

.logo-icon {
  font-size: 1.4rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.logo-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav__link {
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--clr-muted);
  transition: var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: var(--clr-white);
  background: rgba(255,255,255,0.06);
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.4rem;
}

.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ── 7. Hero ──────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* dotted grid background */
.hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.08) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 30%, transparent 100%);
}

/* glowing orbs */
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: float 8s ease-in-out infinite;
}

.hero__orb--1 {
  width: 500px; height: 500px;
  top: -100px; left: -100px;
  background: radial-gradient(circle, var(--clr-accent-1), transparent 70%);
  animation-delay: 0s;
}

.hero__orb--2 {
  width: 400px; height: 400px;
  top: 50%; right: -80px;
  background: radial-gradient(circle, var(--clr-accent-2), transparent 70%);
  animation-delay: -3s;
}

.hero__orb--3 {
  width: 300px; height: 300px;
  bottom: -50px; left: 40%;
  background: radial-gradient(circle, var(--clr-accent-3), transparent 70%);
  animation-delay: -5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) scale(1); }
  50%       { transform: translateY(-30px) scale(1.05); }
}

.hero__content {
  position: relative;
  z-index: 2;
  padding-top: 6rem;
  padding-bottom: 4rem;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-accent-3);
  margin-bottom: 1.25rem;
  opacity: 0;
  animation: slideUp 0.8s var(--ease-smooth) 0.2s forwards;
}

.hero__title {
  font-size: clamp(3.5rem, 10vw, 8rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: slideUp 0.9s var(--ease-smooth) 0.4s forwards;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--clr-muted);
  max-width: 560px;
  line-height: 1.75;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: slideUp 0.9s var(--ease-smooth) 0.6s forwards;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  opacity: 0;
  animation: slideUp 0.9s var(--ease-smooth) 0.8s forwards;
}

.hero__scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--clr-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0;
  animation: fadeIn 1s var(--ease-smooth) 1.4s forwards;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--clr-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.2); transform-origin: top; }
}

/* ── 8. About ─────────────────────────────────────────────── */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.about__body {
  color: var(--clr-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1rem;
}

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

.stat-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.stat-card:hover {
  border-color: var(--clr-border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

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

.stat-card__number {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--clr-white);
}

.stat-card__number .accent {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-card__label {
  font-size: 0.8rem;
  color: var(--clr-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
}

/* ── 9. Services ──────────────────────────────────────────── */
.services {
  background: var(--clr-surface);
  position: relative;
}

.services::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-glow);
  pointer-events: none;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: var(--space-md);
}

.service-card {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.75rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition);
  border-radius: inherit;
}

.service-card:hover {
  border-color: var(--clr-border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.service-card__icon {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.service-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.service-card__desc {
  color: var(--clr-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.service-card__tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--clr-accent-1);
  background: rgba(99, 102, 241, 0.1);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(99, 102, 241, 0.25);
}

/* ── 10. Work / Portfolio ─────────────────────────────────── */
.work__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 1.25rem;
  margin-top: var(--space-md);
}

.project-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--clr-border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.project-card--wide {
  grid-column: span 2;
}

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

.project-card--wide .project-card__visual {
  height: 280px;
}

/* Gradient visuals for placeholder project imagery */
.project-card__visual--1 {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4c1d95 70%, #5b21b6 100%);
}
.project-card__visual--1::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(99,102,241,0.5), transparent 60%),
              radial-gradient(circle at 70% 20%, rgba(168,85,247,0.4), transparent 50%);
}

.project-card__visual--2 {
  background: linear-gradient(135deg, #0c1a2e 0%, #0e3a5c 50%, #0369a1 100%);
}
.project-card__visual--2::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 60% 60%, rgba(6,182,212,0.5), transparent 60%);
}

.project-card__visual--3 {
  background: linear-gradient(135deg, #1a0e2e 0%, #3b1a5c 50%, #6b21a8 100%);
}
.project-card__visual--3::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 40% 40%, rgba(168,85,247,0.5), transparent 60%);
}

.project-card__info {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.project-card__category {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-accent-1);
}

.project-card__title {
  font-size: 1.2rem;
  font-weight: 700;
}

.project-card__desc {
  color: var(--clr-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  flex: 1;
}

.project-card__link {
  color: var(--clr-accent-1);
  font-size: 0.875rem;
  font-weight: 600;
  transition: var(--transition);
  align-self: flex-start;
  margin-top: 0.5rem;
}

.project-card__link:hover { color: var(--clr-accent-2); letter-spacing: 0.03em; }

/* ── 11. Contact ──────────────────────────────────────────── */
.contact {
  background: var(--clr-surface);
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-glow);
  pointer-events: none;
}

.contact__inner {
  max-width: 760px;
}

.contact__subtitle {
  color: var(--clr-muted);
  font-size: 1.05rem;
  margin-bottom: var(--space-md);
  margin-top: -0.75rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--clr-muted);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea {
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  color: var(--clr-white);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  transition: var(--transition);
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(100, 116, 139, 0.7);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--clr-accent-1);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.form-status {
  font-size: 0.9rem;
  min-height: 1.4em;
  transition: var(--transition);
}

.form-status.success { color: #22c55e; }
.form-status.error   { color: #ef4444; }

.btn-arrow {
  display: inline-block;
  transition: transform var(--transition);
}

.btn:hover .btn-arrow { transform: translateX(4px); }

/* ── 12. Footer ───────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--clr-border);
  padding-block: var(--space-lg);
}

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

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.footer__tagline {
  font-size: 0.85rem;
  color: var(--clr-muted);
  letter-spacing: 0.05em;
}

.footer__nav ul {
  display: flex;
  gap: 1.5rem;
}

.footer__nav a {
  font-size: 0.875rem;
  color: var(--clr-muted);
  transition: var(--transition);
}

.footer__nav a:hover { color: var(--clr-white); }

.footer__copy {
  font-size: 0.8rem;
  color: var(--clr-muted);
  font-family: var(--font-mono);
}

/* ── 13. Animations ───────────────────────────────────────── */
@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Scroll-reveal: elements start hidden until JS adds .visible */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--ease-smooth), transform 0.7s var(--ease-smooth);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ── 14. Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .about__grid {
    grid-template-columns: 1fr;
  }

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

  .project-card--wide {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  :root {
    --space-xl: 5rem;
    --space-lg: 3rem;
  }

  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__burger {
    display: flex;
  }

  /* Mobile nav open state */
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 16, 0.97);
    backdrop-filter: blur(16px);
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 99;
    animation: fadeIn 0.3s var(--ease-smooth) forwards;
  }

  .nav__links.open .nav__link {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--clr-white);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

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

@media (max-width: 480px) {
  .hero__title {
    font-size: clamp(3rem, 15vw, 5rem);
  }

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

/* ── 15. Scrollbar ────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--clr-bg); }
::-webkit-scrollbar-thumb {
  background: var(--clr-surface-2);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover { background: var(--clr-accent-1); }

/* ── 16. Selection ────────────────────────────────────────── */
::selection {
  background: rgba(99, 102, 241, 0.35);
  color: var(--clr-white);
}