:root {
  /* ── Brand ── */
  --color-teal:        #39BACD;
  --color-teal-dark:   #34A8BA;
  --color-teal-deeper: #2A8B9A;
  --color-teal-light:  #8EE0EA;
  --color-teal-mist:   #DDF3F7;
  --color-teal-ultra:  #F2F9FB;

  --color-yellow:      #39BACD;
  --color-yellow-dark: #2A8B9A;
  --color-yellow-light:#DDF3F7;

  /* ── Neutral ── */
  --color-white:       #FFFFFF;
  --color-off-white:   #F7FBFC;
  --color-surface:     #F2F9FB;
  --color-border:      #D9E7EB;
  --color-dark:        #101C29;
  --color-dark-soft:   #1B2A38;
  --color-mid:         #526170;
  --color-muted:       #7A8794;

  /* ── Functional ── */
  --color-success:     #38A169;
  --color-error:       #E53E3E;

  /* ── Typography ── */
  --font-display: 'Inter', system-ui, sans-serif;
  --font-body:    'Inter',  system-ui, sans-serif;

  /* ── Spacing (4px base) ── */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  24px;
  --space-6:  32px;
  --space-7:  48px;
  --space-8:  64px;
  --space-9:  80px;
  --space-10: 120px;

  /* ── Layout ── */
  --container-max:    1280px;
  --container-narrow: 720px;
  --gutter:           20px;

  /* ── Radius ── */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-xl:   28px;
  --radius-full: 9999px;

  /* ── Shadow ── */
  --shadow-sm:     0 1px 4px  rgba(16,28,41,.08);
  --shadow-md:     0 4px 20px rgba(16,28,41,.12);
  --shadow-lg:     0 12px 40px rgba(16,28,41,.16);
  --shadow-card:   0 4px 24px rgba(16,28,41,.08);
  --shadow-card-h: 0 16px 48px rgba(16,28,41,.16);
  --shadow-yellow: 0 0 0 3px  rgba(57,186,205,.35);

  /* ── Easing ── */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  /* ── Transitions ── */
  --t-fast:   150ms var(--ease-out);
  --t-normal: 300ms var(--ease-out);
  --t-slow:   600ms var(--ease-out);

  /* ── Nav height ── */
  --nav-h: 72px;
  --nav-h-scrolled: 56px;
}