/* base.css — Reset, Typo, Layout, Buttons, Mesh-Hintergrund (Premium-Upgrade) */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg-mesh) fixed;
  line-height: 1.55;
  font-weight: var(--weight-reg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(124,156,255,0.3); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-y); position: relative; z-index: 2; }

h1, h2, h3 { letter-spacing: var(--tracking-head); font-weight: var(--weight-semi); line-height: 1.08; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: var(--weight-semi); letter-spacing: .08em; text-transform: uppercase;
  color: var(--ink-on-accent);
  background: var(--surface-2); border: 1px solid var(--glass-border-bright);
  padding: 7px 14px; border-radius: var(--r-pill);
  -webkit-backdrop-filter: blur(var(--blur)); backdrop-filter: blur(var(--blur));
  box-shadow: 0 2px 12px -4px rgba(91,124,250,0.25);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 10px var(--accent-2), 0 0 4px var(--accent-2); }
.grad-text {
  background: var(--accent-gradient-vivid); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

.section-head { text-align: center; max-width: 640px; margin: 0 auto clamp(40px, 5.5vw, 60px); }
.section-head h2 { font-size: clamp(28px, 4.4vw, 46px); margin: 14px 0 14px; font-weight: var(--weight-bold); }
.section-head p { color: var(--ink-body); font-size: 17px; line-height: 1.6; }

/* Buttons */
.btn {
  cursor: pointer; border: none; border-radius: var(--r-chip);
  font-weight: var(--weight-semi); font-size: 15px;
  padding: 13px 24px;
  transition: transform var(--dur-fast) var(--ease-soft), box-shadow var(--dur-med) var(--ease-soft), filter var(--dur-med) var(--ease-soft);
  display: inline-flex; align-items: center; gap: 9px;
  position: relative;
}
.btn-primary {
  background: var(--accent-gradient-vivid); color: #1a1145;
  box-shadow: var(--shadow-card), 0 8px 28px -8px rgba(91,124,250,0.45);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift), 0 14px 40px -8px rgba(91,124,250,0.55);
  filter: brightness(1.04);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: var(--surface-1); border: 1px solid var(--glass-border);
  color: var(--ink);
  -webkit-backdrop-filter: blur(var(--blur)); backdrop-filter: blur(var(--blur));
  box-shadow: 0 1px 4px rgba(46,72,140,0.04);
}
.btn-ghost:hover { transform: translateY(-2px); box-shadow: var(--shadow-card); }
.btn-ghost:active { transform: translateY(0); }
.btn-lg { padding: 16px 30px; font-size: 16px; border-radius: 18px; }
.btn-sm { padding: 9px 16px; font-size: 13.5px; border-radius: var(--r-chip); }

/* Glass card primitive — premium layered borders + inner light */
.glass {
  background: var(--surface-1);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(var(--blur)); backdrop-filter: blur(var(--blur));
  box-shadow: var(--shadow-card), var(--glass-inner);
  border-radius: var(--r-card);
  position: relative;
}
/* subtle top highlight arc on glass cards */
.glass::before {
  content: '';
  position: absolute; inset: 0; border-radius: inherit;
  background: linear-gradient(180deg, rgba(255,255,255,0.55) 0%, transparent 40%);
  pointer-events: none;
}

/* Mesh ambient blobs (deko, leichte Drift) */
.ambient { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .45; animation: drift var(--float-dur) ease-in-out infinite; }
.blob.b1 { width: 480px; height: 480px; background: #B0CBFF; top: -140px; left: -100px; }
.blob.b2 { width: 420px; height: 420px; background: #D0BFFF; top: 26%; right: -140px; animation-delay: -3s; }
.blob.b3 { width: 400px; height: 400px; background: #A8F0D8; bottom: -160px; left: 28%; animation-delay: -5s; }
@keyframes drift { 50% { transform: translate(34px, -40px) scale(1.08); } }

/* Deep mesh layer (second ambient plane) */
.ambient-deep { position: fixed; inset: 0; z-index: 0; pointer-events: none; background: var(--bg-mesh-deep); opacity: 1; animation: meshBreath 18s var(--ease-soft) infinite; }
@keyframes meshBreath { 0%, 100% { opacity: 1; } 50% { opacity: 0.6; } }

.muted { color: var(--ink-muted); }
.center { text-align: center; }
[hidden] { display: none !important; }

@media (max-width: 760px) {
  .section { padding-block: clamp(48px, 12vw, 80px); }
}

@media (prefers-reduced-motion: reduce) {
  .ambient-deep { animation: none; }
}