:root {
    --primary:    #004E64;
    --deep:       #001E2E;
    --mid:        #006E8E;
    --light:      #38A3C4;
    --pale:       #9DD4E8;
    --foam:       #D6EFF7;
    --white:      #F4FBFE;
    --accent:     #00B4D8;
    --sand:       #E8D5B0;
    --text:       #0A1F2C;
    --muted:      #4A7A8E;
  }

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

  body {
    font-family: 'Montserrat', sans-serif;
    background: var(--primary);  
    color: var(--white);
    min-height: 100vh;
   
  }

  /* ── HERO ────────────────────────────────────────────────── */
  .hero {
    position: relative;
    background: linear-gradient(160deg, var(--deep) 0%, var(--primary) 60%, var(--mid) 100%);
    padding: 80px 60px 60px;
    overflow: hidden;
  }
  .hero::before {
    content: '';
    position: absolute; inset: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 400'%3E%3Cpath d='M0 300 Q200 200 400 280 Q600 360 800 250 Q1000 140 1200 220 L1200 400 L0 400Z' fill='%23001E2E' opacity='0.4'/%3E%3Cpath d='M0 350 Q300 270 600 310 Q900 350 1200 280 L1200 400 L0 400Z' fill='%23001E2E' opacity='0.5'/%3E%3C/svg%3E") bottom/cover no-repeat;
    pointer-events: none;
  }
  .hero-label {
    font-size: 11px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--pale);
    margin-bottom: 16px;
  }
  .hero h1 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(36px, 5vw, 58px);
    line-height: 1.05;
    letter-spacing: 6px;
    margin-bottom: 12px;
  }
  .hero h1 em { font-style: normal; color: var(--accent); }
  .hero p {
    color: var(--pale);
    font-family: 'Montserrat', sans-serif;
    font-weight: 300;
    max-width: 480px;
    line-height: 1.7;
    margin-bottom: 32px;
  }

  /* ── LOGO SECTION ─────────────────────────────────────────── */
  .logo-svg {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    margin-top: 16px;
  }
  .logo-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 12px;
    padding: 32px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    backdrop-filter: blur(8px);
  }
  .logo-card.light-bg { background: var(--white); }
  .logo-card-label {
    font-size: 11px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--muted);
  }
  .logo-card.light-bg .logo-card-label { color: var(--muted); }

  /* ── CONTENT GRID ─────────────────────────────────────────── */
  .content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 60px 40px;
  }
  .section {
    margin-bottom: 72px;
  }
  .section-title {
    font-size: 11px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 8px;
  }
  .section-heading {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 28px;
    letter-spacing: 5px;
    margin-bottom: 32px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding-bottom: 16px;
  }

  /* ── COLORS ───────────────────────────────────────────────── */
  .color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
  }
  .swatch {
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s;
  }
  .swatch:hover { transform: translateY(-4px); }
  .swatch-color {
    height: 90px;
    position: relative;
  }
  .swatch-color::after {
    content: attr(data-hex);
    position: absolute;
    bottom: 8px; right: 10px;
    font-size: 11px;
    font-family: monospace;
    opacity: 0.6;
    color: white;
  }

  .swatch-color.light::after {
  color: #0E0E0E;
}


  .swatch-info {
    background: rgba(255,255,255,0.06);
    padding: 10px 12px;
  }
  .swatch-name { font-size: 13px; font-weight: 500; }
  .swatch-role { font-size: 11px; color: var(--muted); margin-top: 2px; }
  .swatch-hex {
    font-family: monospace;
    font-size: 11px;
    color: var(--pale);
    margin-top: 4px;
    cursor: pointer;
    user-select: all;
  }
  .copied-msg {
    display: none;
    font-size: 10px;
    color: var(--accent);
  }

  /* ── TYPOGRAPHY ───────────────────────────────────────────── */
  .type-demo {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 32px;
    margin-bottom: 16px;
  }
  .type-label {
    font-size: 10px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 12px;
  }
  .type-h1 { font-family: 'Bebas Neue', sans-serif; font-size: 48px; line-height: 1.0; letter-spacing: 6px; }
  .type-h2 { font-family: 'Bebas Neue', sans-serif; font-size: 30px; letter-spacing: 5px; color: var(--accent); }
  .type-h3 { font-family: 'Montserrat', sans-serif; font-size: 18px; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; }
  .type-body { font-family: 'Montserrat', sans-serif; font-size: 15px; line-height: 1.9; font-weight: 300; color: var(--pale); max-width: 600px; }
  .type-caption { font-family: 'Montserrat', sans-serif; font-size: 11px; letter-spacing: 2.5px; text-transform: uppercase; color: var(--muted); }

  .font-pair {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
  }
  .font-box {
    flex: 1;
    min-width: 220px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 24px;
  }
  .font-box-name { font-size: 11px; letter-spacing: 3px; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; font-family: 'Montserrat', sans-serif; }
  .font-box-sample { font-size: 28px; margin-bottom: 8px; }
  .font-box-use { font-size: 12px; color: var(--muted); font-family: 'Montserrat', sans-serif; }

  /* ── LOGO USAGE ───────────────────────────────────────────── */
  .usage-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  @media(max-width: 600px) { .usage-grid { grid-template-columns: 1fr; } }
  .usage-card {
    border-radius: 12px;
    padding: 24px;
    position: relative;
    overflow: hidden;
  }
  .usage-card.do { border: 1px solid rgba(0,180,216,0.3); background: rgba(0,78,100,0.3); }
  .usage-card.dont { border: 1px solid rgba(255,100,80,0.3); background: rgba(80,20,20,0.2); }
  .usage-badge {
    display: inline-block;
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 99px;
    margin-bottom: 16px;
  }
  .do .usage-badge { background: rgba(0,180,216,0.2); color: var(--accent); }
  .dont .usage-badge { background: rgba(255,100,80,0.2); color: #ff8070; }
  .usage-rule { font-size: 14px; line-height: 1.6; color: var(--pale); }

  /* ── ICON LIBRARY ─────────────────────────────────────────── */
  .icon-cell {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  .icon-slot {
    width: 72px;
    height: 72px;
    border: 1.5px dashed rgba(0,180,216,0.35);
    border-radius: 14px;
    background: rgba(0,78,100,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(0,180,216,0.25);
    font-size: 22px;
    transition: border-color 0.2s, background 0.2s;
    position: relative;
  }
  .icon-slot:empty::after {
    content: '+';
    font-size: 20px;
    color: rgba(0,180,216,0.3);
    font-family: 'Montserrat', sans-serif;
    font-weight: 300;
  }
  .icon-slot img {
    width: 48px;
    height: 48px;
  }
  .icon-slot:hover {
    border-color: rgba(0,180,216,0.7);
    background: rgba(0,78,100,0.35);
  }
  .icon-label {
    font-family: 'Montserrat', sans-serif;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.5px;
    color: var(--muted);
    text-align: center;
    text-transform: uppercase;
  }

  

  /* ── LOGO SVG MARKS ───────────────────────────────────────── */
  /* Inline SVG styles handled inline */

  /* ── SPACING / UI ─────────────────────────────────────────── */
  .spacing-row {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
  }
  .sp-block {
    background: var(--primary);
    border: 1px solid var(--accent);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    padding-bottom: 6px;
    font-size: 10px;
    color: var(--pale);
    gap: 4px;
  }

  
/* ── DATA VISUALISATION · LIGHT SURFACE ──────────────────── */
  .dv-canvas {
    background: #F5F7FA;
    border-radius: 16px;
    padding: 28px;
    border: 1px solid rgba(0,78,100,0.1);
  }
  .dv-kpi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 20px;
  }
  .dv-kpi {
    background: #ffffff;
    border-radius: 12px;
    padding: 18px 20px;
    border: 1px solid rgba(0,78,100,0.1);
  }
  .dv-kpi-label {
    font-family: 'Montserrat', sans-serif;
    font-size: 10px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #7A9BAA;
    margin-bottom: 8px;
  }
  .dv-kpi-value {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 30px;
    letter-spacing: 2px;
    color: #004E64;
    line-height: 1;
    margin-bottom: 4px;
  }
  .dv-kpi-sub {
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 300;
    color: #7A9BAA;
    margin-bottom: 10px;
  }
  .dv-badge {
    font-family: 'Montserrat', sans-serif;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.5px;
    padding: 3px 10px;
    border-radius: 99px;
    display: inline-block;
  }
  .dv-badge-warn  { background: #FFF8E1; color: #9A6400; border: 1px solid #FFE082; }
  .dv-badge-alert { background: #FFF0EE; color: #B5341A; border: 1px solid #FFBDB7; }
  .dv-card {
    background: #ffffff;
    border-radius: 12px;
    padding: 22px 22px 16px;
    margin-bottom: 16px;
    border: 1px solid rgba(0,78,100,0.08);
  }
  .dv-card-title {
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    color: #002D4F;
    margin-bottom: 4px;
  }
  .dv-card-sub {
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    font-weight: 300;
    color: #7A9BAA;
    margin-bottom: 14px;
    line-height: 1.6;
  }
  .dv-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 12px;
  }
  .dv-leg-item {
    font-family: 'Montserrat', sans-serif;
    font-size: 11px;
    color: #4A7A8E;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .dv-leg-sq {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    flex-shrink: 0;
  }
  .dv-leg-line {
    width: 18px;
    height: 6px;
    flex-shrink: 0;
  }

  /* ── FOOTER ───────────────────────────────────────────────── */
  footer {
    text-align: center;
    padding: 40px;
    font-size: 12px;
    color: var(--muted);
    border-top: 1px solid rgba(255,255,255,0.06);
  }

  .wave-divider {
    width: 100%;
    overflow: hidden;
    line-height: 0;
    margin-top: -1px;
  }

  /* ── BUTTON DEMO SYSTEM ───────────────────────────────────── */
  .btn-demo {
    font-family: 'Bebas Neue', sans-serif;
    letter-spacing: 2px;
    border-radius: 6px;
    cursor: pointer;
    border: none;
    display: block;
    text-align: center;
    transition: all 0.15s;
  }

  /* Sizes */
  .btn-demo.lg { padding: 13px 28px; font-size: 15px; width: 100%; max-width: 200px; }
  .btn-demo.md { padding: 10px 22px; font-size: 13px; width: 100%; max-width: 170px; }
  .btn-demo.sm { padding: 7px 16px;  font-size: 11px; width: 100%; max-width: 140px; }

  /* Primary — teal */
  .btn-demo.primary           { background: #004E64; color: #fff; }
  .btn-demo.primary.hovered   { background: #006E8E; color: #fff; }
  .btn-demo.primary:disabled  { background: rgba(0,78,100,0.25); color: rgba(255,255,255,0.25); cursor: default; }
  .btn-demo.primary:hover:not(.hovered):not(:disabled) { background: #006E8E; }

  /* Secondary — muted slate */
  .btn-demo.secondary           { background: #7B9EAE; color: #fff; }
  .btn-demo.secondary.hovered   { background: #9BBDCC; color: #fff; }
  .btn-demo.secondary:disabled  { background: rgba(123,158,174,0.25); color: rgba(255,255,255,0.25); cursor: default; }

  /* Outline */
  .btn-demo.outline           { background: transparent; color: #F4FBFE; border: 1.5px solid #F4FBFE; }
  .btn-demo.outline.hovered   { background: #004E64; color: #F4FBFE; border-color: #004E64; }
  .btn-demo.outline:disabled  { background: transparent; color: rgba(244,251,254,0.2); border-color: rgba(244,251,254,0.2); cursor: default; }

  /* Warning — amber/yellow */
  .btn-demo.warning           { background: #E6A817; color: #fff; }
  .btn-demo.warning.hovered   { background: #F0BC45; color: #fff; }
  .btn-demo.warning:disabled  { background: rgba(230,168,23,0.2); color: rgba(255,255,255,0.25); cursor: default; }

  /* Danger — coral/red */
  .btn-demo.danger            { background: #E8604C; color: #fff; }
  .btn-demo.danger.hovered    { background: #F0806F; color: #fff; }
  .btn-demo.danger:disabled   { background: rgba(232,96,76,0.2); color: rgba(255,255,255,0.25); cursor: default; }

  /* Legacy buttons kept for other use */
  .btn-row { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
  .btn {
    padding: 12px 28px;
    border-radius: 6px;
    font-family: 'Montserrat', sans-serif;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: all 0.2s;
  }
  .btn-primary { background: var(--primary); color: white; }
  .btn-primary:hover { background: var(--mid); }
  .btn-accent { background: var(--accent); color: var(--deep); }
  .btn-accent:hover { opacity: 0.85; }
  .btn-outline { background: transparent; border: 1.5px solid var(--pale); color: var(--pale); }
  .btn-outline:hover { border-color: var(--accent); color: var(--accent); }