/* ============================================================
   DeepMesh.AI — Design System (CyberSvelte edition)
   Palette: deep navy/near-black base, cyan primary, slate neutrals.
   Ported VERBATIM from src/app.css tokens (--bg:#05080d / --primary:#22d3ee),
   then ENHANCED: layered depth, richer gradients, refined type scale, stronger
   hover/focus/active. Shared primitives keep their original class names so the
   verbatim-copied section markup renders unchanged; the dm-* layer adds the
   enhanced tokens/utilities on top.
   ============================================================ */

:root {
  /* ---- Base / neutrals (verbatim) ---- */
  --bg: #05080d;
  --bg-elevated: #0a0f17;
  --surface: #0d141f;
  --surface-2: #111a27;
  --border: #1b2738;
  --border-strong: #283750;

  /* ---- Text (verbatim) ---- */
  --text: #e8eef6;
  --text-muted: #9fb0c5;
  --text-dim: #64758c;

  /* ---- Brand — cyan/teal accent (verbatim) ---- */
  --primary: #22d3ee;
  --primary-bright: #5ce6f7;
  --primary-deep: #0891b2;
  --primary-glow: rgba(34, 211, 238, 0.18);

  /* ---- Radii / motion (verbatim) ---- */
  --radius: 14px;
  --radius-sm: 10px;
  --radius-lg: 22px;
  --maxw: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;

  /* ---- dm-* ENHANCEMENT layer (bold + tasteful, same hues) ---- */
  /* Deeper accent stops for richer multi-stop gradients */
  --dm-primary: var(--primary, #22d3ee);
  --dm-primary-bright: var(--primary-bright, #5ce6f7);
  --dm-primary-deep: var(--primary-deep, #0891b2);
  --dm-accent-violet: #6366f1;          /* tasteful cool secondary for depth */
  --dm-accent-aqua: #2dd4bf;            /* teal companion for gradient range */

  /* Layered depth: ambient page glow + elevation shadows */
  --dm-glow-soft: rgba(34, 211, 238, 0.12);
  --dm-glow-mid: rgba(34, 211, 238, 0.22);
  --dm-shadow-1: 0 1px 0 rgba(255, 255, 255, 0.03) inset,
    0 10px 30px -18px rgba(0, 0, 0, 0.9);
  --dm-shadow-2: 0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 24px 60px -28px rgba(0, 0, 0, 0.95);
  --dm-ring: 0 0 0 1px var(--border-strong, #283750);
  --dm-ring-primary: 0 0 0 1px rgba(34, 211, 238, 0.55),
    0 0 32px -6px var(--dm-glow-mid);

  /* Refined type scale (fluid) */
  --dm-fs-eyebrow: 0.72rem;
  --dm-fs-body: 1.05rem;
  --dm-fs-display: clamp(2.4rem, 6vw, 4.4rem);
  --dm-fs-title: clamp(2rem, 4.5vw, 3.1rem);

  /* Gradients reused across surfaces */
  --dm-grad-primary: linear-gradient(
    135deg,
    var(--dm-primary-bright) 0%,
    var(--dm-primary) 45%,
    var(--dm-primary-deep) 100%
  );
  --dm-grad-surface: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.035),
    rgba(255, 255, 255, 0) 60%
  );
}

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

html,
body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

/* Enhanced: layered ambient depth behind the whole page (tasteful, subtle). */
body {
  overflow-x: hidden;
  background-color: var(--bg);
  background-image:
    radial-gradient(60% 50% at 50% -8%, rgba(34, 211, 238, 0.1), transparent 70%),
    radial-gradient(50% 40% at 90% 8%, rgba(99, 102, 241, 0.08), transparent 72%),
    radial-gradient(45% 45% at 5% 18%, rgba(45, 212, 191, 0.06), transparent 70%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
}

::selection {
  background: var(--primary-glow);
  color: var(--primary-bright);
}

/* Enhanced custom scrollbar — on-brand, restrained. */
::-webkit-scrollbar {
  width: 11px;
  height: 11px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 999px;
  border: 3px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-deep);
}

h1,
h2,
h3,
h4 {
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 700;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

:focus-visible {
  outline: none;
  box-shadow: var(--dm-ring-primary);
  border-radius: var(--radius-sm);
}

/* ---------- Layout helpers ---------- */
.container,
.dm-container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section,
.dm-section {
  padding-block: clamp(4rem, 9vw, 8rem);
  position: relative;
}

.eyebrow,
.dm-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--dm-fs-eyebrow);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--primary);
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.05);
  /* Enhanced: faint inner sheen + soft outer glow */
  background-image: var(--dm-grad-surface);
  box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.06),
    0 8px 30px -18px var(--dm-glow-mid);
  backdrop-filter: blur(6px);
}

.section-title,
.dm-section-title {
  font-size: var(--dm-fs-title);
  margin-top: 1.25rem;
}

.section-sub,
.dm-section-sub {
  color: var(--text-muted);
  font-size: var(--dm-fs-body);
  max-width: 38rem;
  margin-top: 1rem;
}

.grad-text,
.dm-grad-text {
  background: linear-gradient(100deg, var(--primary-bright), var(--primary-deep));
  /* Enhanced: wider, richer multi-stop range while staying on-brand */
  background: linear-gradient(
    100deg,
    var(--primary-bright) 0%,
    var(--primary) 40%,
    var(--dm-accent-aqua) 70%,
    var(--primary-deep) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn,
.dm-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease),
    border-color 0.25s var(--ease), box-shadow 0.25s var(--ease),
    filter 0.25s var(--ease);
  white-space: nowrap;
  position: relative;
  isolation: isolate;
}

.btn:active,
.dm-btn:active {
  transform: translateY(0) scale(0.985);
}

.btn-primary,
.dm-btn-primary {
  background: linear-gradient(180deg, var(--primary-bright), var(--primary-deep));
  color: #03121a;
  box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.4),
    0 12px 40px -12px var(--primary-glow);
  /* Enhanced: tasteful top highlight for a pressed-metal feel */
  background-image: linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.28),
      rgba(255, 255, 255, 0) 42%
    ),
    linear-gradient(180deg, var(--primary-bright), var(--primary-deep));
}

.btn-primary:hover,
.dm-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(92, 230, 247, 0.6),
    0 18px 50px -10px rgba(34, 211, 238, 0.35);
  filter: saturate(1.08) brightness(1.03);
}

.btn-ghost,
.dm-btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
  background-image: var(--dm-grad-surface);
}

.btn-ghost:hover,
.dm-btn-ghost:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(34, 211, 238, 0.25),
    0 14px 40px -18px var(--dm-glow-mid);
}

.icon,
.dm-icon {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: -0.125em;
  flex-shrink: 0;
}

/* ---------- Cards ---------- */
.card,
.dm-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease),
    background 0.3s var(--ease), box-shadow 0.3s var(--ease);
  /* Enhanced: subtle elevation + inner sheen for layered depth */
  background-image: var(--dm-grad-surface);
  box-shadow: var(--dm-shadow-1);
}

.card:hover,
.dm-card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--dm-shadow-2), 0 0 0 1px rgba(34, 211, 238, 0.14);
}

/* ---------- Reveal on scroll ---------- */
.reveal,
.dm-reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  will-change: opacity, transform;
}

.reveal.in,
.dm-reveal.in {
  opacity: 1;
  transform: none;
}

/* grid background */
.grid-bg,
.dm-grid-bg {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(
    ellipse 80% 60% at 50% 0%,
    #000 30%,
    transparent 75%
  );
  opacity: 0.35;
  pointer-events: none;
}

/* dm-* enhancement utilities (opt-in; do not alter verbatim markup) */
.dm-glow {
  box-shadow: var(--dm-ring-primary);
}
.dm-elevate {
  box-shadow: var(--dm-shadow-2);
}
.dm-grad-surface {
  background-image: var(--dm-grad-surface);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  .reveal,
  .dm-reveal {
    opacity: 1;
    transform: none;
  }
  html,
  body {
    scroll-behavior: auto;
  }
}