@layer reset, theme, components, motion;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  html { color-scheme: light; scroll-behavior: smooth; }
  body { margin: 0; min-height: 100vh; }
  button, input, textarea, select { font: inherit; }
  img, svg { display: block; max-width: 100%; }
}

@layer theme {
  :root,
  html[data-theme="light"] {
    --zs-bg: #f6f7fb;
    --zs-bg-elevated: #ffffff;
    --zs-bg-soft: #eef0f7;
    --zs-text: #11131a;
    --zs-text-soft: #626776;
    --zs-border: rgba(17, 19, 26, 0.11);
    --zs-brand: #6847f5;
    --zs-brand-strong: #5231df;
    --zs-accent: #17b6ff;
    --zs-success: #12a875;
    --zs-shadow: 0 22px 60px rgba(31, 32, 48, 0.12);
    --zs-glass: rgba(255, 255, 255, 0.72);
    color-scheme: light;
  }

  html[data-theme="dark"] {
    --zs-bg: #080a0f;
    --zs-bg-elevated: #10131b;
    --zs-bg-soft: #171b25;
    --zs-text: #f7f8fc;
    --zs-text-soft: #a7adbb;
    --zs-border: rgba(255, 255, 255, 0.11);
    --zs-brand: #8b72ff;
    --zs-brand-strong: #a28fff;
    --zs-accent: #32c6ff;
    --zs-success: #3ed49d;
    --zs-shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
    --zs-glass: rgba(16, 19, 27, 0.76);
    color-scheme: dark;
  }

  body {
    color: var(--zs-text);
    background:
      radial-gradient(circle at 12% -10%, color-mix(in srgb, var(--zs-brand) 15%, transparent), transparent 32rem),
      radial-gradient(circle at 92% 2%, color-mix(in srgb, var(--zs-accent) 10%, transparent), transparent 28rem),
      var(--zs-bg);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    transition: color .25s ease, background-color .25s ease;
  }

  ::selection { color: #fff; background: var(--zs-brand); }
}

@layer components {
  .zs-surface {
    color: var(--zs-text);
    background: var(--zs-bg-elevated);
    border: 1px solid var(--zs-border);
    border-radius: 22px;
    box-shadow: var(--zs-shadow);
  }

  .zs-glass {
    background: var(--zs-glass);
    border: 1px solid var(--zs-border);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }

  .zs-gradient-text {
    color: transparent;
    background: linear-gradient(120deg, var(--zs-brand-strong), var(--zs-accent));
    background-clip: text;
    -webkit-background-clip: text;
  }

  .zs-icon {
    width: 48px;
    height: 48px;
    filter: drop-shadow(0 8px 16px color-mix(in srgb, var(--zs-brand) 22%, transparent));
  }

  .zs-theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    min-height: 42px;
    padding: 8px 13px;
    color: var(--zs-text);
    background: var(--zs-bg-elevated);
    border: 1px solid var(--zs-border);
    border-radius: 999px;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .08);
  }

  .zs-theme-toggle svg { width: 20px; height: 20px; overflow: visible; }
  .zs-theme-toggle path { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; transition: opacity .2s ease, transform .3s ease; transform-origin: center; }
  .zs-theme-toggle__moon { opacity: 0; transform: scale(.55) rotate(-28deg); }
  html[data-theme="dark"] .zs-theme-toggle__sun { opacity: 0; transform: scale(.55) rotate(28deg); }
  html[data-theme="dark"] .zs-theme-toggle__moon { opacity: 1; transform: scale(1) rotate(0); }
  .zs-theme-toggle span { font-size: 12px; font-weight: 750; }

  .zs-loader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: grid;
    place-items: center;
    color: var(--zs-text);
    background: var(--zs-bg);
    transition: opacity .38s ease, visibility .38s ease;
  }

  .zs-loader.is-leaving { opacity: 0; visibility: hidden; pointer-events: none; }
  .zs-loader__panel { display: grid; justify-items: center; gap: 9px; padding: 30px; text-align: center; }
  .zs-loader__panel img { margin-bottom: 5px; }
  .zs-loader__panel strong { font-size: 16px; letter-spacing: -.02em; }
  .zs-loader__panel span { color: var(--zs-text-soft); font-size: 11px; }
}

@layer motion {
  .zs-float { animation: zs-float 4.6s ease-in-out infinite; }
  .zs-float-delay { animation: zs-float 5.2s .7s ease-in-out infinite; }
  .zs-pulse-soft { animation: zs-pulse 2.8s ease-in-out infinite; }
  .zs-reveal { animation: zs-reveal .75s cubic-bezier(.2,.8,.2,1) both; }

  @keyframes zs-float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }
  @keyframes zs-pulse { 0%,100% { opacity: .72; } 50% { opacity: 1; } }
  @keyframes zs-reveal { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
}

@media (max-width: 520px) {
  .zs-theme-toggle span { display: none; }
  .zs-theme-toggle { width: 42px; justify-content: center; padding-inline: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
}