/* ============================================================
   GTM WAVE — MASTER SITE STYLES
   Shared rules only. Homepage-specific CSS lives in index.html.
   Component CSS lives with its component.
   ============================================================ */

:root {
    /* Brand */
    --primary: #7172DB;
    --primary-hover: #5F60D0;
    --primary-deep: #4F4FC9;
    --primary-bright: #8B8CE8;
    --primary-soft: rgba(113, 114, 219, 0.10);
    --primary-dim: rgba(113, 114, 219, 0.06);
    --primary-glow: rgba(113, 114, 219, 0.45);
    --secondary: #1C2735;
    --secondary-soft: #CECFE0;

    /* Surfaces */
    --bg: #FBFBFD;
    --bg-soft: #F4F4F9;
    --surface: #FFFFFF;
    --surface-soft: #FAFAFD;
    --surface-dark: #0A1018;
    --surface-darker: #060A11;

    /* Text */
    --heading: #0A0A0F;
    --text: #1C2735;
    --text-muted: rgba(28, 39, 53, 0.62);
    --text-subtle: rgba(28, 39, 53, 0.45);
    --text-on-dark: rgba(255, 255, 255, 0.75);

    /* Lines */
    --border: rgba(28, 39, 53, 0.08);
    --border-strong: rgba(28, 39, 53, 0.14);
    --border-purple: rgba(113, 114, 219, 0.22);
    --border-purple-strong: rgba(113, 114, 219, 0.45);

    /* Effects */
    --shadow-sm: 0 1px 2px rgba(28, 39, 53, 0.04);
    --shadow-md: 0 4px 14px rgba(28, 39, 53, 0.06), 0 1px 2px rgba(28, 39, 53, 0.04);
    --shadow-lg: 0 18px 40px rgba(28, 39, 53, 0.08), 0 4px 10px rgba(28, 39, 53, 0.04);
    --shadow-xl: 0 30px 70px rgba(28, 39, 53, 0.12), 0 8px 18px rgba(28, 39, 53, 0.06);
    --shadow-purple: 0 16px 40px rgba(113, 114, 219, 0.28);
    --shadow-purple-lg: 0 30px 60px rgba(113, 114, 219, 0.35);
    --gradient-primary: linear-gradient(135deg, #7172DB 0%, #4F4FC9 100%);
    --gradient-soft: linear-gradient(135deg, rgba(113, 114, 219, 0.12) 0%, rgba(113, 114, 219, 0) 100%);
    --gradient-text: linear-gradient(135deg, #7172DB 0%, #4F4FC9 50%, #1C2735 100%);
    --gradient-border: linear-gradient(135deg, #7172DB 0%, #4F4FC9 50%, #1C2735 100%);
    --gradient-dark: linear-gradient(135deg, #0A1018 0%, #1C2735 100%);
    --gradient-mesh:
      radial-gradient(ellipse 800px 600px at 15% 10%, rgba(113, 114, 219, 0.22), transparent 50%),
      radial-gradient(ellipse 700px 500px at 85% 20%, rgba(139, 140, 232, 0.15), transparent 55%),
      radial-gradient(ellipse 900px 600px at 50% 100%, rgba(79, 79, 201, 0.16), transparent 55%);
    --gradient-aurora:
      radial-gradient(ellipse 600px 400px at 20% 30%, rgba(113, 114, 219, 0.35), transparent 60%),
      radial-gradient(ellipse 500px 350px at 80% 70%, rgba(139, 140, 232, 0.25), transparent 60%),
      radial-gradient(ellipse 400px 300px at 50% 50%, rgba(79, 79, 201, 0.20), transparent 60%);

    /* Type */
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
    --font-serif: 'Instrument Serif', serif;

    /* Layout */
    --max: 1280px;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    position: relative;
  }

  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; display: block; }
  .wrap { max-width: var(--max); margin: 0 auto; padding: 0 32px; }
  button { font: inherit; cursor: pointer; border: none; background: none; }

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

  a:focus-visible, button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
    border-radius: 6px;
  }


  .btn-primary {
    font-weight: 600;
    font-size: 15px;
    padding: 16px 28px;
    border-radius: 999px;
    background: var(--gradient-primary);
    color: #fff;
    transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 10px 30px rgba(113, 114, 219, 0.35), inset 0 1px 0 rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
    will-change: transform;
  }
  .btn-primary::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.30), transparent 50%);
    opacity: 0;
    transition: opacity 0.3s;
  }
  .btn-primary:hover {
    box-shadow: 0 20px 44px rgba(113, 114, 219, 0.55);
  }
  .btn-primary:hover::before { opacity: 1; }
  .btn-primary .arrow { transition: transform 0.3s var(--ease); }
  .btn-primary:hover .arrow { transform: translateX(4px); }
  .btn-secondary {
    font-weight: 600;
    font-size: 15px;
    padding: 16px 26px;
    border-radius: 999px;
    border: 1px solid var(--border-strong);
    background: rgba(255, 255, 255, 0.7);
    color: var(--heading);
    backdrop-filter: blur(6px);
    transition: background 0.2s, border-color 0.2s, transform 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
  }
  .btn-secondary:hover {
    background: var(--surface);
    border-color: var(--primary);
    transform: translateY(-1px);
  }
  .btn-secondary svg { transition: transform 0.3s var(--ease); }
  .btn-secondary:hover svg { transform: translateX(2px); }


  /* =========================================================
     SECTION SCAFFOLDING
     ========================================================= */
  section { padding: 78px 0; position: relative; }
  .section-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.10em; text-transform: uppercase; color: var(--primary); margin-bottom: 18px; display: inline-flex; align-items: center; gap: 10px; }
  .section-label::before { content: ""; width: 24px; height: 1px; background: var(--primary); }
  h2.section-title { font-family: var(--font-display); font-weight: 600; font-size: clamp(36px, 4.2vw, 56px); letter-spacing: -0.04em; color: var(--heading); max-width: none; width: 100%; margin-bottom: 22px; line-height: 1.04; }
  h2.section-title em { font-family: var(--font-serif); font-style: italic; font-weight: 400; background: var(--gradient-text); -webkit-background-clip: text; background-clip: text; color: transparent; letter-spacing: -0.02em; }
  .section-sub { color: var(--text-muted); font-size: 17.5px; max-width: none; width: 100%; line-height: 1.55; }
  .reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
  .reveal.visible { opacity: 1; transform: translateY(0); }