/* ============================================================
   0it.in — Design System
   Dark theme, mobile-first, product-accent driven
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Playfair+Display:ital,wght@1,700&display=swap");

/* ---------- CSS Custom Properties ---------- */
:root {
  --bg-start:      #04041a;
  --bg-end:        #0d0d2b;
  --surface:       rgba(0,0,0,0.38);
  --surface-hover: rgba(0,0,0,0.50);
  --border:        rgba(255,255,255,0.18);
  --text-primary:  #ffffff;
  --text-secondary:#e2e8f0;
  --text-muted:    #94a3b8;
  --accent:        #06b6d4;      /* overridden per-product via inline style */
  --radius-card:   16px;
  --radius-btn:    999px;
  --transition:    0.25s ease;
  --font-base:     "Inter", system-ui, sans-serif;
  --font-display:  "Playfair Display", Georgia, serif;
  --max-content:   1100px;
  --max-card:      480px;
}

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

html {
  font-family: var(--font-base);
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100dvh;
  background:
    linear-gradient(135deg, rgba(4,4,26,0.52) 0%, rgba(13,13,43,0.48) 100%),
    url("background.png") center center / cover fixed;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ---------- 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;
}

/* ============================================================
   SHARED NAV
   ============================================================ */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2rem;
  background: rgba(4,4,26,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-nav .logo {
  display: flex; align-items: center; gap: 0.625rem;
  font-weight: 700; font-size: 1.125rem; letter-spacing: -0.02em;
}

.site-nav .logo-box {
  width: 36px; height: 36px;
  background: #fff; color: #000;
  border-radius: 8px;
  display: grid; place-items: center;
  font-weight: 900; font-size: 1rem;
}

.site-nav .nav-links {
  display: flex; gap: 2rem; list-style: none;
}

.site-nav .nav-links a {
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.site-nav .nav-links a:hover { color: var(--text-primary); }

/* ============================================================
   HOME PAGE — HERO
   ============================================================ */
.hero {
  text-align: center;
  padding: clamp(3rem, 8vw, 6rem) 1.5rem clamp(2rem, 5vw, 4rem);
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: clamp(2rem, 6vw, 3.75rem);
  font-weight: 800; line-height: 1.15;
  letter-spacing: -0.03em;
  color: #ffffff;
  text-shadow: 0 2px 24px rgba(0,0,0,0.6);
  max-width: 820px; margin: 0 auto 1.5rem;
}

.hero-title em {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--accent);
}

/* ============================================================
   HOME PAGE — PRODUCT CARDS GRID
   ============================================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: 1.5rem;
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 1.5rem clamp(3rem, 8vw, 6rem);
}

.product-card {
  position: relative;
  background: rgba(0,0,0,0.40);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-card);
  padding: 2rem;
  display: flex; flex-direction: column; gap: 0.75rem;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  overflow: hidden;
}

.product-card::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 12%, transparent), transparent 60%);
  opacity: 0; transition: opacity var(--transition);
  border-radius: var(--radius-card);
  pointer-events: none;
}

.product-card:hover { transform: translateY(-4px); background: rgba(0,0,0,0.54); }
.product-card:hover::before { opacity: 1; }

.product-card:hover { box-shadow: 0 20px 60px color-mix(in srgb, var(--accent) 20%, transparent); }

.card-category {
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent);
}

.card-title {
  font-size: clamp(1.4rem, 3vw, 1.75rem);
  font-weight: 700; line-height: 1.2;
  color: #ffffff;
  text-shadow: 0 1px 8px rgba(0,0,0,0.5);
}

.card-desc {
  font-size: 0.9rem; color: #cbd5e1;
  line-height: 1.6; flex: 1;
}

.card-cta {
  align-self: flex-start;
  margin-top: 1.5rem;
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--accent);
  color: var(--accent);
  font-size: 0.85rem; font-weight: 600;
  letter-spacing: 0.02em;
  transition: background var(--transition), color var(--transition);
  min-height: 44px;
}

.card-cta:hover {
  background: var(--accent);
  color: #000;
}

/* ============================================================
   SUB-PRODUCT PAGE — LINK-IN-BIO
   ============================================================ */
.subpage-wrap {
  min-height: 100dvh;
  display: flex; flex-direction: column;
  align-items: center;
  padding: clamp(2rem, 6vw, 4rem) 1.25rem;
}

.subpage-logo-wrap {
  width: clamp(96px, 25vw, 128px);
  height: clamp(96px, 25vw, 128px);
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--accent);
  box-shadow: 0 0 32px color-mix(in srgb, var(--accent) 35%, transparent);
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}

.subpage-logo-wrap img {
  width: 100%; height: 100%; object-fit: cover;
}

.subpage-name {
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 800; letter-spacing: -0.02em;
  color: #ffffff;
  text-shadow: 0 2px 20px rgba(0,0,0,0.65);
  text-align: center;
}

.subpage-category {
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent);
  text-align: center;
  margin-top: 0.25rem; margin-bottom: 0.25rem;
  text-shadow: 0 1px 8px rgba(0,0,0,0.4);
}

.subpage-tagline {
  font-size: 0.95rem; color: #e2e8f0;
  text-align: center; max-width: 360px;
  margin-bottom: 2rem;
  text-shadow: 0 1px 8px rgba(0,0,0,0.5);
}

.subpage-links {
  width: 100%; max-width: var(--max-card);
  display: flex; flex-direction: column; gap: 0.875rem;
}

.link-btn {
  display: flex; align-items: center; gap: 1rem;
  padding: 0 1.25rem;
  height: 60px; min-height: 60px;
  background: rgba(0,0,0,0.42);
  border: 1px solid rgba(255,255,255,0.15);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-btn);
  color: #ffffff;
  font-size: 0.95rem; font-weight: 600;
  text-shadow: 0 1px 6px rgba(0,0,0,0.5);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  width: 100%;
  text-align: left;
  cursor: pointer;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.link-btn:hover {
  background: rgba(0,0,0,0.58);
  transform: translateX(4px);
  box-shadow: 0 8px 24px color-mix(in srgb, var(--accent) 30%, transparent);
  border-color: var(--accent);
}

.link-btn:active { transform: translateX(2px); }

.link-btn .icon {
  width: 28px; height: 28px; flex-shrink: 0;
  display: grid; place-items: center;
}

.link-btn .icon img,
.link-btn .icon svg {
  width: 24px; height: 24px;
  filter: brightness(0) invert(1);
}

.subpage-footer {
  margin-top: auto; padding-top: 2.5rem;
  font-size: 0.8rem; color: #cbd5e1;
  text-align: center;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
}

.subpage-footer .back-home {
  display: inline-flex; align-items: center; gap: 0.35rem;
  font-size: 0.8rem; font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.02em;
  transition: color var(--transition), gap var(--transition);
}

.subpage-footer .back-home:hover {
  color: #ffffff;
  gap: 0.55rem;
}

.subpage-footer a { color: #e2e8f0; }
.subpage-footer a:hover { color: #ffffff; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
  .site-nav { padding: 0.875rem 1.25rem; }
  .site-nav .nav-links { gap: 1.25rem; }
  .site-nav .nav-links a { font-size: 0.72rem; }

  .products-grid { padding-left: 1rem; padding-right: 1rem; }
  .product-card { padding: 1.5rem; }
  .card-cta { width: 100%; justify-content: center; }
}

@media (max-width: 400px) {
  .site-nav .nav-links { gap: 0.875rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}