/* ===========================================================================
   EDITAKU — Shared components
   ---------------------------------------------------------------------------
   Building blocks used by landing + studio: reset, container, button, card,
   nav, footer, modal. Page-specific layouts live in landing.css / studio.css.
   =========================================================================== */

/* ── Reset ───────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; tab-size: 4; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, video, svg, canvas { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: none; cursor: pointer; padding: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4, h5, h6, p { margin: 0; }

::selection { background: var(--accent); color: var(--text-on-accent); }

/* ── Container ───────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--s-6);
}
.container--narrow { max-width: var(--container-narrow); }

/* ── Typography helpers ──────────────────────────────────────────────────── */
.display {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
}
.h1 { font-size: var(--fs-h1); font-weight: 800; line-height: var(--lh-tight); letter-spacing: var(--tracking-tight); }
.h2 { font-size: var(--fs-h2); font-weight: 700; line-height: var(--lh-snug); letter-spacing: var(--tracking-snug); }
.h3 { font-size: var(--fs-h3); font-weight: 700; line-height: var(--lh-snug); }
.lead { font-size: var(--fs-lead); color: var(--text-soft); line-height: var(--lh-relaxed); }
.muted { color: var(--text-muted); }
.soft  { color: var(--text-soft); }

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

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 0 var(--s-6);
  height: 48px;
  border-radius: var(--r-full);
  font-size: var(--fs-body);
  font-weight: 600;
  letter-spacing: -0.005em;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease-out),
              background var(--t-base) var(--ease),
              box-shadow var(--t-base) var(--ease),
              opacity var(--t-base) var(--ease);
  will-change: transform;
}
.btn:active { transform: translateY(1px); }
.btn:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 2px;
}

/* Primary — viral gradient. Reserved for the top conversion CTA per page. */
.btn--primary {
  background: var(--viral-gradient);
  color: var(--text-on-accent);
  box-shadow: var(--glow-viral);
  position: relative;
  overflow: hidden;
}
.btn--primary::after {
  /* subtle shimmer pass on hover */
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 30%, rgba(255,255,255,0.25) 50%, transparent 70%);
  background-size: 200% 100%;
  background-position: -200% 0;
  transition: background-position 600ms var(--ease-out);
  pointer-events: none;
}
.btn--primary:hover { transform: translateY(-1px); box-shadow: 0 0 0 1px rgba(168,85,247,0.5), 0 12px 50px rgba(236,72,153,0.5); }
.btn--primary:hover::after { background-position: 200% 0; }

/* Secondary — clean white-on-glass. Used for repeated CTAs, navigation. */
.btn--secondary {
  background: var(--text);
  color: #000;
}
.btn--secondary:hover { background: #fff; transform: translateY(-1px); }

/* Ghost — minimal, for low-emphasis actions */
.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn--ghost:hover { background: var(--bg-elev-2); border-color: var(--border-accent); }

/* Sizes */
.btn--sm { height: 36px; padding: 0 var(--s-4); font-size: var(--fs-small); }
.btn--lg { height: 56px; padding: 0 var(--s-8); font-size: var(--fs-lead); }

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--s-6);
  transition: transform var(--t-base) var(--ease-out),
              border-color var(--t-base) var(--ease),
              background var(--t-base) var(--ease);
}
.card--interactive:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  background: var(--bg-elev-3);
}
.card--glow:hover { box-shadow: var(--glow-accent); }

/* ── Pills / badges ──────────────────────────────────────────────────────── */
.pill {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-1) var(--s-3);
  border-radius: var(--r-full);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
}
.pill--accent {
  background: var(--accent-soft);
  border-color: var(--border-accent);
  color: var(--accent-bright);
}
.pill--viral {
  background: linear-gradient(135deg, rgba(168,85,247,0.18), rgba(236,72,153,0.18));
  border-color: rgba(236,72,153,0.35);
  color: #f0abfc;
}
.pill .dot {
  width: 6px;
  height: 6px;
  border-radius: var(--r-full);
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

/* ── Section ─────────────────────────────────────────────────────────────── */
.section {
  padding: var(--s-24) 0;
  position: relative;
}
.section--tight { padding: var(--s-16) 0; }
.section-eyebrow {
  display: inline-block;
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: var(--s-4);
}
.section-title {
  font-size: var(--fs-h1);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  max-width: 800px;
  margin-bottom: var(--s-4);
}
.section-lead {
  font-size: var(--fs-lead);
  color: var(--text-soft);
  max-width: 640px;
  line-height: var(--lh-relaxed);
}
.section-header { margin-bottom: var(--s-12); }
.section-header--center { text-align: center; margin-left: auto; margin-right: auto; }
.section-header--center .section-title,
.section-header--center .section-lead { margin-left: auto; margin-right: auto; }

/* ── Nav (shared) ────────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: var(--bg-overlay);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-8);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-accent);
  font-size: 1.75rem;
  letter-spacing: 0.04em;
  background: var(--hero-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}
.nav-links {
  display: flex;
  gap: var(--s-8);
  align-items: center;
}
.nav-link {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--text-soft);
  transition: color var(--t-fast) var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-cta { display: flex; gap: var(--s-3); align-items: center; }

@media (max-width: 800px) {
  .nav-links { display: none; }
  .nav-cta .btn--ghost { display: none; }
}

/* ── Footer (shared) ─────────────────────────────────────────────────────── */
.footer {
  background: var(--bg-elev-1);
  border-top: 1px solid var(--border);
  padding: var(--s-16) 0 var(--s-8);
  margin-top: var(--s-20);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--s-10);
  margin-bottom: var(--s-12);
}
.footer-col h4 {
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--text);
  margin-bottom: var(--s-4);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--s-3); }
.footer-col a {
  font-size: var(--fs-small);
  color: var(--text-muted);
  transition: color var(--t-fast) var(--ease);
}
.footer-col a:hover { color: var(--text); }
.footer-tagline { color: var(--text-soft); font-size: var(--fs-small); max-width: 280px; line-height: var(--lh-relaxed); margin-top: var(--s-3); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--s-6);
  border-top: 1px solid var(--border);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--s-8); }
  .footer-bottom { flex-direction: column; gap: var(--s-3); }
}

/* ── Modal (shared, used by auth) ────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--s-4);
}
.modal-backdrop[data-open="true"] { display: flex; animation: fade-up var(--t-base) var(--ease-out); }
.modal {
  background: var(--bg-elev-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-xl);
  padding: var(--s-8);
  max-width: 440px;
  width: 100%;
  box-shadow: var(--shadow-xl);
}

/* ── Utility ─────────────────────────────────────────────────────────────── */
.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;
}
.glow {
  position: relative;
}
.glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(from var(--angle), var(--viral-from), var(--viral-to), var(--accent-bright), var(--viral-from));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: rotate-angle 6s linear infinite;
  pointer-events: none;
  opacity: 0.6;
}