/* ============================================================
   DDFM Design System — Shared Tokens
   Import this FIRST in every page, before page-specific CSS.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* ── Typography ─────────────────────────────────────────── */
  --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  /* ── Navy Palette (brand) ───────────────────────────────── */
  --navy-950: #0a1628;
  --navy-900: #0f1f35;
  --navy-800: #162a46;
  --navy-700: #1d3557;
  --navy-600: #264773;
  --navy-500: #2f5a8f;
  --navy-400: #4a7ab5;
  --navy-300: #7ba3d0;
  --navy-200: #b0cae8;
  --navy-100: #dce8f5;
  --navy-50:  #f0f4fa;

  /* ── ARC / Stepper Accent (distinct from --navy-* scale, used only by
       the workflow stepper, .btn-analyze, and the AI Analysis Result Card) ── */
  --navy-arc: #0f3460;
  --gold-arc: #e2c97e;

  /* ── Semantic Colors ────────────────────────────────────── */
  --success:     #10b981;
  --success-bg:  #ecfdf5;
  --success-border: #a7f3d0;
  --success-text:   #065f46;

  --warning:     #f59e0b;
  --warning-bg:  #fffbeb;
  --warning-border: #fde68a;
  --warning-text:   #92400e;

  --danger:      #ef4444;
  --danger-bg:   #fef2f2;
  --danger-border:  #fecaca;
  --danger-text:    #991b1b;

  --info:        #3b82f6;
  --info-bg:     #eff6ff;
  --info-border: #bfdbfe;
  --info-text:   #1e40af;

  /* ── Neutral ────────────────────────────────────────────── */
  --gray-50:  #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* ── Elevation (shadows) ────────────────────────────────── */
  --shadow-xs:  0 1px 2px rgba(10, 22, 40, 0.04);
  --shadow-sm:  0 2px 4px rgba(10, 22, 40, 0.06);
  --shadow-md:  0 4px 12px rgba(10, 22, 40, 0.08);
  --shadow-lg:  0 8px 24px rgba(10, 22, 40, 0.12);
  --shadow-xl:  0 16px 48px rgba(10, 22, 40, 0.16);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.15);

  /* ── Spacing Scale ──────────────────────────────────────── */
  --space-0:  0;
  --space-1:  0.25rem;   /* 4px  */
  --space-2:  0.5rem;    /* 8px  */
  --space-3:  0.75rem;   /* 12px */
  --space-4:  1rem;      /* 16px */
  --space-5:  1.25rem;   /* 20px */
  --space-6:  1.5rem;    /* 24px */
  --space-8:  2rem;      /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */

  /* ── Border Radius ──────────────────────────────────────── */
  --radius-xs:  4px;
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  /* ── Motion ─────────────────────────────────────────────── */
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --dur-fast:    150ms;
  --dur-normal:  250ms;
  --dur-slow:    400ms;
  --dur-slower:  600ms;

  /* ── Layout ─────────────────────────────────────────────── */
  --max-width: 1280px;
  --top-bar-h: 56px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--navy-50);
  min-height: 100vh;
}

/* ── Shared Top-Bar Navigation ──────────────────────────────── */
.top-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--top-bar-h);
  background: rgba(15, 31, 53, 0.95);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.top-bar-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-bar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

a.top-bar-brand {
  text-decoration: none;
  cursor: pointer;
}

.brand-logo {
  font-size: 1.25rem;
  color: var(--info);
  filter: drop-shadow(0 0 6px rgba(59, 130, 246, 0.4));
}

.brand-name {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}

.top-bar-nav {
  display: flex;
  gap: var(--space-1);
}

.nav-link {
  position: relative;
  padding: var(--space-2) var(--space-4);
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--dur-normal) var(--ease-out);
}

.nav-link:hover {
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.06);
}

.nav-link.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background: var(--info);
  border-radius: 2px 2px 0 0;
  box-shadow: 0 0 8px rgba(59, 130, 246, 0.4);
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--dur-normal) var(--ease-out);
}

.lang-toggle:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.lang-flag {
  font-size: 1rem;
  line-height: 1;
}

.lang-code {
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* ── Shared Button System ───────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--dur-normal) var(--ease-out);
  line-height: 1.4;
}

.btn-primary {
  background: linear-gradient(135deg, var(--navy-700) 0%, var(--navy-800) 100%);
  color: #fff;
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255,255,255,0.06);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--navy-600) 0%, var(--navy-700) 100%);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-xs);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: #fff;
  color: var(--navy-700);
  border: 1.5px solid var(--navy-200);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background: var(--navy-50);
  border-color: var(--navy-300);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.btn-secondary:active {
  transform: translateY(0);
}

.btn-confirm {
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-confirm:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-confirm:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-danger:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* ── Shared Card ────────────────────────────────────────────── */
.card {
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--dur-normal) var(--ease-out),
              transform var(--dur-normal) var(--ease-out);
}

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

.card-elevated:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ── Shared Form Elements ───────────────────────────────────── */
.form-input,
.form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  font-size: 0.875rem;
  color: var(--gray-800);
  background: #fff;
  transition: all var(--dur-normal) var(--ease-out);
}

.form-input:hover,
.form-select:hover {
  border-color: var(--navy-300);
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--info);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gray-600);
  letter-spacing: 0.01em;
}

/* ── Shared Badges ──────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge-success { background: var(--success-bg); color: var(--success-text); }
.badge-warning { background: var(--warning-bg); color: var(--warning-text); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger-text); }
.badge-info    { background: var(--info-bg);    color: var(--info-text); }
.badge-neutral { background: var(--gray-100);   color: var(--gray-600); }

/* ── Skeleton Loader ────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--gray-100) 25%,
    var(--gray-200) 50%,
    var(--gray-100) 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; }
}

.skeleton-text {
  height: 0.875rem;
  margin-bottom: var(--space-2);
}

.skeleton-heading {
  height: 1.5rem;
  width: 60%;
  margin-bottom: var(--space-4);
}

.skeleton-card {
  height: 120px;
}

/* ── Entrance Animations ────────────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp var(--dur-slow) var(--ease-out) both;
}

.animate-in-delay-1 { animation-delay: 80ms; }
.animate-in-delay-2 { animation-delay: 160ms; }
.animate-in-delay-3 { animation-delay: 240ms; }
.animate-in-delay-4 { animation-delay: 320ms; }

/* ── Utility: Hidden ────────────────────────────────────────── */
.hidden {
  display: none !important;
}

/* ── Print ──────────────────────────────────────────────────── */
@media print {
  .top-bar,
  .btn,
  .export-actions,
  .form-actions {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }
}