/* =========================================================================
   CONFLUENCE DESIGN SYSTEM & TOKENS (LIGHT THEME)
   Clean, technical, high-contrast coastal intelligence platform
   ========================================================================= */

:root {
  /* Brand & Primary Accents (Professional Marine Cyan / Teal) */
  --color-primary: #0891B2;
  --color-primary-hover: #0E7490;
  --color-primary-active: #155E75;
  --color-primary-subtle: #ECFEFF;
  --color-primary-border: #A5F3FC;

  /* Neutrals & Surfaces */
  --color-background: #F5F8FA;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F8FAFC;
  --color-surface-muted: #F1F5F9;
  --color-surface-card: #FFFFFF;

  /* Typography Colors */
  --color-text: #0F172A;
  --color-text-secondary: #334155;
  --color-text-muted: #64748B;
  --color-text-dim: #94A3B8;

  /* Borders & Dividers */
  --color-border: #DCE5EA;
  --color-border-subtle: #E2E8F0;
  --color-border-hover: #CBD5E1;

  /* Status & Alerts */
  --color-success: #059669;
  --color-success-bg: #ECFDF5;
  --color-success-border: #A7F3D0;
  --color-success-text: #065F46;

  --color-warning: #D97706;
  --color-warning-bg: #FFFBEB;
  --color-warning-border: #FDE68A;
  --color-warning-text: #92400E;
  --color-warning-tag: #FEF3C7;

  --color-danger: #DC2626;
  --color-danger-bg: #FEF2F2;
  --color-danger-border: #FECACA;
  --color-danger-text: #991B1B;
  --color-danger-tag: #FEE2E2;

  --color-info: #2563EB;
  --color-info-bg: #EFF6FF;
  --color-info-border: #BFDBFE;
  --color-info-text: #1E40AF;

  /* Shadows (Elevations) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);

  /* Border Radii */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Typography Stacks */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Motion */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Reset & Box-Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

/* Prevent image overflow */
img, svg, video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Accessibility focus ring */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}