/* ═══════════════════════════════════════════════════════════════
   APEX DESIGN SYSTEM — GLOBAL CSS
   ═══════════════════════════════════════════════════════════════ */

:root {
  /* ── COLOR PALETTE ── */
  --color-black:        #0A0A0A;
  --color-black-soft:   #111111;
  --color-surface-1:    #141414;
  --color-surface-2:    #1A1A1A;
  --color-surface-3:    #202020;
  --color-surface-4:    #2A2A2A;
  --color-surface-5:    #333333;
  --color-surface-6:    #3D3D3D;

  --color-gray-100:     #F5F5F5;
  --color-gray-200:     #E8E8E8;
  --color-gray-300:     #CCCCCC;
  --color-gray-400:     #AAAAAA;
  --color-gray-500:     #888888;
  --color-gray-600:     #666666;
  --color-gray-700:     #444444;
  --color-gray-800:     #2E2E2E;

  --color-white:        #FFFFFF;
  --color-white-95:     rgba(255,255,255,0.95);
  --color-white-80:     rgba(255,255,255,0.80);
  --color-white-60:     rgba(255,255,255,0.60);
  --color-white-40:     rgba(255,255,255,0.40);
  --color-white-20:     rgba(255,255,255,0.20);
  --color-white-10:     rgba(255,255,255,0.10);
  --color-white-05:     rgba(255,255,255,0.05);

  --color-red-50:       #FFF1F0;
  --color-red-100:      #FFD7D4;
  --color-red-200:      #FFB3AE;
  --color-red-300:      #FF7A73;
  --color-red-400:      #FF4D43;
  --color-red-500:      #E8302A;
  --color-red-600:      #C42020;
  --color-red-700:      #9E1717;
  --color-red-800:      #7A1010;
  --color-red-900:      #560B0B;

  --color-success:      #22C55E;
  --color-success-bg:   rgba(34,197,94,0.12);
  --color-success-border: rgba(34,197,94,0.30);

  --color-warning:      #F59E0B;
  --color-warning-bg:   rgba(245,158,11,0.12);
  --color-warning-border: rgba(245,158,11,0.30);

  --color-error:        #EF4444;
  --color-error-bg:     rgba(239,68,68,0.12);
  --color-error-border: rgba(239,68,68,0.30);

  --color-info:         #3B82F6;
  --color-info-bg:      rgba(59,130,246,0.12);
  --color-info-border:  rgba(59,130,246,0.30);

  /* ── SEMANTIC TOKENS ── */
  --bg-page:            var(--color-black);
  --bg-surface:         var(--color-surface-1);
  --bg-surface-raised:  var(--color-surface-2);
  --bg-surface-overlay: var(--color-surface-3);
  --bg-interactive:     var(--color-surface-4);
  --bg-interactive-hover: var(--color-surface-5);

  --text-primary:       var(--color-white);
  --text-secondary:     var(--color-white-60);
  --text-tertiary:      var(--color-white-40);
  --text-disabled:      var(--color-white-20);
  --text-inverse:       var(--color-black);
  --text-accent:        var(--color-red-500);
  --text-accent-hover:  var(--color-red-400);

  --border-subtle:      rgba(255,255,255,0.06);
  --border-default:     rgba(255,255,255,0.10);
  --border-strong:      rgba(255,255,255,0.18);
  --border-accent:      var(--color-red-500);
  --border-focus:       var(--color-red-400);

  --brand-primary:      var(--color-red-500);
  --brand-primary-hover: var(--color-red-400);
  --brand-primary-active: var(--color-red-600);
  --brand-primary-muted: rgba(232,48,42,0.15);
  --brand-primary-subtle: rgba(232,48,42,0.08);

  /* ── TYPOGRAPHY ── */
  --font-sans:          'Geist', system-ui, -apple-system, sans-serif;
  --font-mono:          'Geist Mono', 'Fira Code', monospace;

  --text-xs:    11px;
  --text-sm:    13px;
  --text-base:  14px;
  --text-md:    15px;
  --text-lg:    17px;
  --text-xl:    20px;
  --text-2xl:   24px;
  --text-3xl:   30px;
  --text-4xl:   36px;
  --text-5xl:   48px;

  --weight-light:   300;
  --weight-regular: 400;
  --weight-medium:  500;
  --weight-semibold:600;
  --weight-bold:    700;

  --leading-tight:  1.2;
  --leading-snug:   1.4;
  --leading-normal: 1.6;
  --leading-relaxed:1.75;

  --tracking-tight: -0.03em;
  --tracking-snug:  -0.02em;
  --tracking-normal: 0;
  --tracking-wide:  0.05em;
  --tracking-wider: 0.10em;

  /* ── SPACING ── */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;

  /* ── RADIUS ── */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl:16px;
  --radius-full:9999px;

  /* ── SHADOWS ── */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.3);
  --shadow-lg:  0 10px 30px rgba(0,0,0,0.6), 0 4px 10px rgba(0,0,0,0.4);
  --shadow-xl:  0 20px 60px rgba(0,0,0,0.7), 0 8px 20px rgba(0,0,0,0.5);
  --shadow-accent: 0 4px 20px rgba(232,48,42,0.25);
  --shadow-focus: 0 0 0 3px rgba(232,48,42,0.30);

  /* ── TRANSITIONS ── */
  --transition-fast:  80ms ease;
  --transition-base:  150ms ease;
  --transition-slow:  250ms ease;
  --transition-spring:300ms cubic-bezier(0.34,1.56,0.64,1);

  /* ── Z-INDEX ── */
  --z-base:     0;
  --z-raised:   10;
  --z-dropdown: 100;
  --z-overlay:  200;
  --z-modal:    300;
  --z-toast:    400;
  --z-tooltip:  500;

  /* ── LAYOUT ── */
  --sidebar-width:      240px;
  --sidebar-collapsed:  60px;
  --navbar-height:      56px;
  --content-max:        1280px;
  --content-narrow:     720px;
}

/* ═══════════════════════════════════════════
   RESET & BASE
   ═══════════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 14px; scroll-behavior: smooth; }

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

/* ═══════════════════════════════════════════
   TYPOGRAPHY SYSTEM
   ═══════════════════════════════════════════ */
.t-display { font-size: var(--text-5xl); font-weight: var(--weight-bold); letter-spacing: var(--tracking-tight); line-height: var(--leading-tight); }
.t-h1 { font-size: var(--text-4xl); font-weight: var(--weight-bold); letter-spacing: var(--tracking-tight); line-height: var(--leading-tight); }
.t-h2 { font-size: var(--text-3xl); font-weight: var(--weight-semibold); letter-spacing: var(--tracking-snug); line-height: var(--leading-tight); }
.t-h3 { font-size: var(--text-2xl); font-weight: var(--weight-semibold); letter-spacing: var(--tracking-snug); }
.t-h4 { font-size: var(--text-xl); font-weight: var(--weight-medium); letter-spacing: var(--tracking-snug); }
.t-h5 { font-size: var(--text-lg); font-weight: var(--weight-medium); }
.t-h6 { font-size: var(--text-md); font-weight: var(--weight-medium); }
.t-body-lg { font-size: var(--text-md); line-height: var(--leading-relaxed); }
.t-body    { font-size: var(--text-base); line-height: var(--leading-normal); }
.t-body-sm { font-size: var(--text-sm); line-height: var(--leading-normal); }
.t-label   { font-size: var(--text-xs); font-weight: var(--weight-medium); letter-spacing: var(--tracking-wider); text-transform: uppercase; }
.t-caption { font-size: var(--text-xs); color: var(--text-tertiary); }
.t-code    { font-family: var(--font-mono); font-size: var(--text-sm); }

.t-primary   { color: var(--text-primary); }
.t-secondary { color: var(--text-secondary); }
.t-tertiary  { color: var(--text-tertiary); }
.t-accent    { color: var(--text-accent); }
.t-success   { color: var(--color-success); }
.t-warning   { color: var(--color-warning); }
.t-error     { color: var(--color-error); }
.t-info      { color: var(--color-info); }

/* ═══════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-4);
  height: 36px;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: 1;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base),
              border-color var(--transition-base), box-shadow var(--transition-base),
              transform var(--transition-fast);
  user-select: none;
  outline: none;
}
.btn:active { transform: scale(0.97); }

.btn-xs { height: 26px; padding: 0 var(--space-2); font-size: var(--text-xs); border-radius: var(--radius-sm); }
.btn-sm { height: 30px; padding: 0 var(--space-3); font-size: var(--text-xs); }
.btn-lg { height: 44px; padding: 0 var(--space-6); font-size: var(--text-md); border-radius: var(--radius-lg); }
.btn-xl { height: 52px; padding: 0 var(--space-8); font-size: var(--text-lg); border-radius: var(--radius-xl); }
.btn-icon { padding: 0; width: 36px; }
.btn-block { width: 100%; }

.btn-primary { background: var(--brand-primary); color: var(--color-white); border-color: var(--brand-primary); }
.btn-primary:hover:not(:disabled) { background: var(--brand-primary-hover); border-color: var(--brand-primary-hover); box-shadow: var(--shadow-accent); }
.btn-primary:focus-visible { box-shadow: var(--shadow-focus); }
.btn-primary:active:not(:disabled) { background: var(--brand-primary-active); }

.btn-secondary { background: var(--bg-interactive); color: var(--text-primary); border-color: var(--border-default); }
.btn-secondary:hover:not(:disabled) { background: var(--bg-interactive-hover); border-color: var(--border-strong); }
.btn-secondary:focus-visible { border-color: var(--border-focus); box-shadow: var(--shadow-focus); }

.btn-danger { background: var(--color-error-bg); color: var(--color-error); border-color: var(--color-error-border); }
.btn-danger:hover:not(:disabled) { background: rgba(239,68,68,0.20); border-color: var(--color-error); }

.btn-ghost { background: transparent; color: var(--text-secondary); border-color: transparent; }
.btn-ghost:hover:not(:disabled) { background: var(--color-white-05); color: var(--text-primary); }

.btn-outline { background: transparent; color: var(--brand-primary); border-color: var(--brand-primary); }
.btn-outline:hover:not(:disabled) { background: var(--brand-primary-muted); }

.btn-link { background: transparent; color: var(--text-accent); border-color: transparent; padding: 0; height: auto; text-decoration: underline; text-underline-offset: 3px; }
.btn-link:hover:not(:disabled) { color: var(--text-accent-hover); }

.btn:disabled { opacity: 0.38; cursor: not-allowed; transform: none; box-shadow: none; }

/* ═══════════════════════════════════════════
   FORM CONTROLS
   ═══════════════════════════════════════════ */
.form-group { display: flex; flex-direction: column; gap: var(--space-2); }
.form-label { font-size: var(--text-sm); font-weight: var(--weight-medium); color: var(--text-secondary); display: flex; align-items: center; gap: var(--space-1); }
.input {
  display: flex; width: 100%; height: 36px; padding: 0 var(--space-3);
  font-family: var(--font-sans); font-size: var(--text-sm); color: var(--text-primary);
  background: var(--bg-surface-raised); border: 1px solid var(--border-default);
  border-radius: var(--radius-md); outline: none; transition: all var(--transition-base);
}
.input:focus { border-color: var(--border-focus); box-shadow: var(--shadow-focus); background: var(--bg-surface-overlay); }

/* ═══════════════════════════════════════════
   CARDS
   ═══════════════════════════════════════════ */
.card { background: var(--bg-surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-xl); overflow: hidden; transition: all var(--transition-base); }
.card-header { padding: var(--space-4) var(--space-5); border-bottom: 1px solid var(--border-subtle); display: flex; align-items: center; justify-content: space-between; }
.card-body { padding: var(--space-5); }
.card-footer { padding: var(--space-4) var(--space-5); border-top: 1px solid var(--border-subtle); background: var(--color-white-05); }

/* ═══════════════════════════════════════════
   TABLES
   ═══════════════════════════════════════════ */
.table-container { width: 100%; overflow-x: auto; border: 1px solid var(--border-subtle); border-radius: var(--radius-xl); background: var(--bg-surface); }
.table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.table th { padding: var(--space-3) var(--space-4); text-align: left; font-size: var(--text-xs); font-weight: var(--weight-medium); color: var(--text-tertiary); text-transform: uppercase; background: var(--color-white-05); border-bottom: 1px solid var(--border-subtle); }
.table td { padding: var(--space-3) var(--space-4); color: var(--text-secondary); border-bottom: 1px solid var(--border-subtle); }

/* ═══════════════════════════════════════════
   BADGES & ALERTS
   ═══════════════════════════════════════════ */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; font-size: var(--text-xs); font-weight: var(--weight-medium); border-radius: var(--radius-full); border: 1px solid; white-space: nowrap; }
.badge-success { background: var(--color-success-bg); color: var(--color-success); border-color: var(--color-success-border); }
.badge-error { background: var(--color-error-bg); color: var(--color-error); border-color: var(--color-error-border); }

.alert { display: flex; gap: var(--space-3); padding: var(--space-4); border-radius: var(--radius-lg); border-left: 3px solid; font-size: var(--text-sm); }
.alert-error { background: var(--color-error-bg); border-color: var(--color-error); color: var(--color-error); }
.alert-success { background: var(--color-success-bg); border-color: var(--color-success); color: var(--color-success); }

/* ═══════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════ */
.auth-container { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: var(--space-6); background: var(--bg-page); }
.auth-card { width: 100%; max-width: 400px; }

.app-layout { display: flex; min-height: 100vh; }
.app-content { flex: 1; padding: var(--space-8); max-width: var(--content-max); margin: 0 auto; }

.navbar { height: var(--navbar-height); border-bottom: 1px solid var(--border-subtle); display: flex; align-items: center; padding: 0 var(--space-6); background: var(--bg-surface); }
.navbar-brand { font-weight: var(--weight-bold); font-size: var(--text-lg); color: var(--brand-primary); text-decoration: none; }

.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}