/* =============================================
   SchichtBuddy – Shared Styles
   Apple-inspired dark design with glassmorphism
   ============================================= */

:root {
  --accent: #4fc3f7;
  --accent-2: #29b6f6;
  --accent-green: #66bb6a;
  --accent-orange: #ffa726;
  --bg: #0a0a0f;
  --bg-2: #0f0f1a;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(79, 195, 247, 0.3);
  --text: #f0f0f5;
  --text-secondary: rgba(240, 240, 245, 0.6);
  --text-tertiary: rgba(240, 240, 245, 0.35);
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-accent: 0 0 40px rgba(79, 195, 247, 0.12);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
  --nav-h: 72px;
}

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

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ─────────────────────────────── */
h1, h2, h3, h4 {
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); font-weight: 600; }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }

p { color: var(--text-secondary); line-height: 1.75; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}
a:hover { color: #fff; }

/* ── Navigation ─────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--border);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}

.nav-logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(255, 167, 38, 0.3);
  flex-shrink: 0;
}

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

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }

.nav-cta {
  background: var(--accent);
  color: #000 !important;
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  font-weight: 600 !important;
  font-size: 0.85rem !important;
  transition: transform var(--transition), box-shadow var(--transition) !important;
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(79, 195, 247, 0.4);
  color: #000 !important;
}

/* ── Layout ─────────────────────────────────── */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 3rem);
}

section {
  padding: clamp(5rem, 10vw, 8rem) 0;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 3rem;
}

/* ── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.8rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover {
  background: #81d4fa;
  color: #000;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79, 195, 247, 0.35);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  color: var(--text);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(79, 195, 247, 0.4);
}
.btn-outline:hover {
  background: rgba(79, 195, 247, 0.08);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ── Cards ───────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(79, 195, 247, 0.3), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}
.card:hover::before { opacity: 1; }

/* ── Glass ───────────────────────────────────── */
.glass {
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: saturate(180%) blur(24px);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
}

/* ── Gradient background blobs ───────────────── */
.bg-blobs {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.12;
  animation: blob-float 20s ease-in-out infinite;
}

.bg-blob-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #4fc3f7, transparent);
  top: -200px; left: -200px;
  animation-delay: 0s;
}
.bg-blob-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #0288d1, transparent);
  bottom: -150px; right: -100px;
  animation-delay: -7s;
}
.bg-blob-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #66bb6a, transparent);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: -14s;
  opacity: 0.06;
}

@keyframes blob-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.05); }
  66% { transform: translate(-30px, 20px) scale(0.95); }
}

/* ── Page Header ─────────────────────────────── */
.page-header {
  padding: calc(var(--nav-h) + 4rem) 0 3rem;
  text-align: center;
}

.page-header .section-label { margin: 0 auto 1rem; display: block; }
.page-header h1 { margin-bottom: 1rem; }
.page-header p { margin: 0 auto; max-width: 600px; font-size: 1.1rem; }

/* ── Divider ─────────────────────────────────── */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0;
}

/* ── Fade-in animations ──────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ── Footer ──────────────────────────────────── */
footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  color: var(--text-tertiary);
  font-size: 0.85rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-tertiary);
  font-size: 0.85rem;
}
.footer-links a:hover { color: var(--text-secondary); }

/* ── Responsive ──────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

/* ── Scrollbar ───────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.25); }