/* ═══════════════════════════════════════════════════════
   Ecotaxis Design System v4
   System font · CSS variables · Mobile-first
   GPU animations · Accessible
   ═══════════════════════════════════════════════════════ */

@layer base, components, utilities;

/* ── CSS Custom Properties ──────────────────────────── */
@layer base {
  :root {
    --color-primary: #ff3333;
    --color-primary-hover: #e02e2e;
    --color-primary-glow: rgba(255, 51, 51, 0.35);

    --color-success: #22c55e;
    --color-warning: #eab308;
    --color-danger: #ef4444;
    --color-info: #3b82f6;

    --color-bg: #0a0a0c;
    --color-bg-elevated: #121216;
    --color-bg-hover: #1c1c26;
    --color-bg-glass: rgba(18, 18, 22, 0.78);
    --color-bg-glass-strong: rgba(18, 18, 22, 0.92);

    --color-border: #1e1e26;
    --color-border-light: #2a2a36;
    --color-border-subtle: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(255, 255, 255, 0.12);

    --color-text: #ffffff;
    --color-text-muted: #787882;
    --color-text-muted-light: #9999a3;
    --color-text-inverse: #0a0a0c;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', monospace;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-6xl: 3.75rem;
    --text-8xl: 6rem;

    --leading-body: 1.5;
    --leading-heading: 1.15;
    --leading-tight: 1.05;

    /* Spacing (4px grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-6: 24px;
    --space-8: 32px;
    --space-12: 48px;
    --space-16: 64px;
    --space-24: 96px;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow-primary: 0 0 30px var(--color-primary-glow);
    --shadow-glow-success: 0 0 20px rgba(34, 197, 94, 0.25);

    /* Z-index */
    --z-base: 1;
    --z-overlay: 10;
    --z-dropdown: 20;
    --z-modal: 50;
    --z-toast: 100;

    /* Transitions */
    --transition-fast: 150ms ease-out;
    --transition-base: 200ms ease-out;
    --transition-slow: 350ms ease-out;
  }

  @media (prefers-reduced-motion: reduce) {
    :root {
      --transition-fast: 0ms;
      --transition-base: 0ms;
      --transition-slow: 0ms;
    }
    *, *::before, *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }
}

/* ── Reset ──────────────────────────────────────────── */
@layer base {
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

  body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-body);
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }

  h1, h2, h3, h4, h5, h6 { line-height: var(--leading-heading); font-weight: 700; }
  code, pre, .taxi-digit { font-family: var(--font-mono); }
  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: none; }
  button { cursor: pointer; font: inherit; color: inherit; }
  input, select, textarea { font: inherit; color: inherit; }
  ul, ol { list-style: none; }
}

/* ── Focus Visible ──────────────────────────────────── */
@layer base {
  :focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
  }

  button:focus-visible,
  a:focus-visible,
  input:focus-visible,
  select:focus-visible,
  textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
  }

  .card:focus-visible { outline-offset: -2px; }
}

/* ── Glass Components ───────────────────────────────── */
@layer components {
  .glass {
    background: var(--color-bg-glass);
    backdrop-filter: blur(16px) saturate(120%);
    -webkit-backdrop-filter: blur(16px) saturate(120%);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
  }

  .glass-strong {
    background: var(--color-bg-glass-strong);
    backdrop-filter: blur(20px) saturate(140%);
    -webkit-backdrop-filter: blur(20px) saturate(140%);
    border: 1px solid var(--color-border-hover);
    border-radius: var(--radius-md);
  }

  .card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
  }

  .card:hover {
    border-color: var(--color-border-light);
    box-shadow: var(--shadow-md);
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 600;
    border: none;
    transition:
      background var(--transition-fast),
      transform var(--transition-fast),
      box-shadow var(--transition-fast);
    white-space: nowrap;
  }

  .btn:active {
    transform: scale(0.97);
  }

  .btn-primary {
    background: var(--color-primary);
    color: var(--color-text);
  }

  .btn-primary:hover {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-glow-primary);
  }

  .btn-ghost {
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border-subtle);
    color: var(--color-text);
  }

  .btn-ghost:hover {
    background: var(--color-border-hover);
    border-color: var(--color-border-hover);
  }

  .btn-danger {
    background: rgba(255, 51, 51, 0.12);
    border: 1px solid rgba(255, 51, 51, 0.2);
    color: var(--color-danger);
  }

  .btn-danger:hover {
    background: rgba(255, 51, 51, 0.22);
  }

  .input {
    width: 100%;
    background: rgba(10, 10, 12, 0.8);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-3) var(--space-4);
    color: var(--color-text);
    font-size: var(--text-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  }

  .input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255, 51, 51, 0.1);
  }

  .input::placeholder {
    color: var(--color-text-muted);
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 2px var(--space-3);
    border-radius: var(--radius-full);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.03em;
  }

  .badge-success { background: rgba(34, 197, 94, 0.1); color: var(--color-success); }
  .badge-warning { background: rgba(234, 179, 8, 0.1); color: var(--color-warning); }
  .badge-danger  { background: rgba(255, 51, 51, 0.1); color: var(--color-primary); }
  .badge-muted   { background: rgba(120, 120, 130, 0.1); color: var(--color-text-muted); }

  .divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-subtle), transparent);
    margin: var(--space-4) 0;
  }

  .skeleton {
    background: linear-gradient(90deg, var(--color-bg-elevated) 25%, var(--color-bg-hover) 50%, var(--color-bg-elevated) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
  }

  @keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
  }

  .glow-text {
    text-shadow: 0 0 30px var(--color-primary-glow), 0 0 60px rgba(255, 51, 51, 0.12);
  }

  .glow-success {
    text-shadow: 0 0 20px rgba(34, 197, 94, 0.2);
  }

  .pulse-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    animation: pulse 2s ease-in-out infinite;
  }

  @keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
  }

  .tab-digit {
    font-family: var(--font-mono);
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
    letter-spacing: -0.02em;
  }

  .map-container {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border-subtle);
  }

  .leaflet-control-attribution,
  .leaflet-control-zoom { display: none; }

  .scroll-y {
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .scroll-none {
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .scroll-none::-webkit-scrollbar { display: none; }

  ::-webkit-scrollbar { width: 5px; height: 5px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb { background: var(--color-border-light); border-radius: 3px; }
  ::-webkit-scrollbar-thumb:hover { background: #3a3a46; }
}

/* ── Animations ─────────────────────────────────────── */
@layer components {
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  @keyframes slideUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  @keyframes spin {
    to { transform: rotate(360deg); }
  }

  .fade-in  { animation: fadeIn var(--transition-slow) ease-out; }
  .slide-up { animation: slideUp var(--transition-slow) ease-out; }

  .loader {
    width: 32px; height: 32px;
    border: 3px solid var(--color-border-subtle);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 0.7s linear infinite;
  }
}

/* ── Responsive breakpoints (mobile-first) ──────────── */
@layer utilities {
  .container-sm  { max-width: 640px; margin: 0 auto; }
  .container-md  { max-width: 768px; margin: 0 auto; }
  .container-lg  { max-width: 1024px; margin: 0 auto; }
  .container-xl  { max-width: 1280px; margin: 0 auto; }
  .content-max   { max-width: 65ch; }

  .truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

  @media (max-width: 639px) {
    .hide-mobile { display: none; }
  }
  @media (min-width: 640px) {
    .hide-desktop { display: none; }
  }

  @media (hover: none) {
    .card:hover { border-color: var(--color-border); box-shadow: none; }
  }
}