/* ============================================================
   base.css — Delphi Design System
   Source of truth: DESIGN.md
   Do not add values here that aren't in DESIGN.md.
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */

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

/* ── CSS Reset ────────────────────────────────────────────── */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── Colour Tokens (DESIGN.md §2) ─────────────────────────── */

:root {
  /* Base surfaces */
  --color-background:    #FFFFFF;
  --color-surface:       #FAFAF9;
  --color-surface-2:     #F5F4F2;
  --color-border:        #E8E6E1;
  --color-border-subtle: #F0EEE9;

  /* Text */
  --color-text-primary:   #0D0D0D;
  --color-text-secondary: #4A4744;
  --color-text-muted:     #9A9590;
  --color-text-inverse:   #FFFFFF;

  /* Purple — intelligence, precision, primary brand */
  --color-purple-50:  #F5F0FF;
  --color-purple-100: #EDE5FF;
  --color-purple-200: #DDD6FE;
  --color-purple-500: #7C3AED;
  --color-purple-600: #6D28D9;
  --color-purple-700: #5B21B6;
  --color-purple-900: #2E1065;

  /* Orange — urgency, deadlines, risk, action */
  --color-orange-50:  #FFF7ED;
  --color-orange-100: #FFEDD5;
  --color-orange-400: #FB923C;
  --color-orange-500: #F97316;
  --color-orange-600: #EA580C;

  /* Semantic — status signals only */
  --color-danger-bg:     #FEF2F2;
  --color-danger-text:   #DC2626;
  --color-danger-border: #FECACA;

  --color-warning-bg:     #FFFBEB;
  --color-warning-text:   #D97706;
  --color-warning-border: #FDE68A;

  --color-success-bg:     #F0FDF4;
  --color-success-text:   #16A34A;
  --color-success-border: #BBF7D0;

  --color-info-bg:     #F5F0FF;
  --color-info-text:   #7C3AED;
  --color-info-border: #EDE5FF;

  /* Reasoning log — the dark moment */
  --color-log-bg:      #080808;
  --color-log-text:    #E5E5E5;
  --color-log-accent:  #7C3AED;
  --color-log-warning: #F97316;
  --color-log-success: #22C55E;
  --color-log-muted:   #525252;
  --color-log-cursor:  #7C3AED;

  /* ── Typography Tokens (DESIGN.md §3) ──────────────────── */

  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  /* Type scale */
  --text-hero:   clamp(48px, 7vw, 88px);
  --text-title:  clamp(28px, 4vw, 40px);
  --text-amount: clamp(32px, 5vw, 52px);
  --text-xl:     24px;
  --text-lg:     18px;
  --text-base:   15px;
  --text-sm:     13px;
  --text-xs:     11px;

  /* Weights */
  --weight-regular:  400;
  --weight-medium:   500;
  --weight-semibold: 600;

  /* Line heights */
  --leading-tight:   1.1;
  --leading-snug:    1.3;
  --leading-normal:  1.6;
  --leading-relaxed: 1.75;

  /* Letter spacing */
  --tracking-tight:  -0.02em;
  --tracking-normal: 0;
  --tracking-wide:   0.06em;

  /* ── Spacing Tokens (DESIGN.md §4) — 8px base grid ─────── */

  --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;
  --space-32: 128px;
}

/* ── Base Body ────────────────────────────────────────────── */

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

/* ── Layout Utilities (DESIGN.md §7) ─────────────────────── */

.content-wrap {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.section-gap {
  margin-bottom: var(--space-12);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

@media (max-width: 640px) {
  .two-col {
    grid-template-columns: 1fr;
  }
}

/* ── Cards (DESIGN.md §5) ────────────────────────────────── */

.card {
  background: var(--color-background);
  border: 0.5px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-6);
}

.card--elevated {
  background: var(--color-background);
  border: 0.5px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-6);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
}

.card--danger {
  background: var(--color-danger-bg);
  border-color: var(--color-danger-border);
}

.card--warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning-border);
}

.card--success {
  background: var(--color-success-bg);
  border-color: var(--color-success-border);
}

.card--info {
  background: var(--color-info-bg);
  border-color: var(--color-info-border);
}

/* ── Buttons (DESIGN.md §5) ──────────────────────────────── */

.btn-primary {
  background: var(--color-purple-600);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 14px 28px;
  font: var(--weight-medium) var(--text-base) var(--font-body);
  cursor: pointer;
  transition: opacity 120ms ease;
  display: inline-block;
  text-decoration: none;
}

.btn-primary:hover {
  opacity: 0.88;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 0.5px solid var(--color-border);
  border-radius: 10px;
  padding: 14px 28px;
  font: var(--weight-medium) var(--text-base) var(--font-body);
  cursor: pointer;
  transition: border-color 120ms ease;
  display: inline-block;
  text-decoration: none;
}

.btn-secondary:hover {
  border-color: var(--color-text-muted);
}

.btn-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
  border: 0.5px solid var(--color-danger-border);
  border-radius: 10px;
  padding: 14px 28px;
  font: var(--weight-medium) var(--text-base) var(--font-body);
  cursor: pointer;
  display: inline-block;
  text-decoration: none;
}

/* ── Form Inputs (DESIGN.md §5) ──────────────────────────── */

.input {
  border: 0.5px solid var(--color-border);
  border-radius: 10px;
  padding: 14px 16px;
  font: var(--weight-regular) var(--text-base) var(--font-body);
  background: var(--color-surface);
  color: var(--color-text-primary);
  width: 100%;
  outline: none;
  transition: border-color 180ms ease;
}

.input:focus {
  border-color: var(--color-purple-500);
}

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

.input-label {
  font: var(--weight-medium) var(--text-sm) var(--font-body);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  display: block;
}

.input-context {
  font: var(--weight-regular) 12px var(--font-body);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

/* ── Filing Row (DESIGN.md §5) ───────────────────────────── */

.filing-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border: 0.5px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-background);
  margin-bottom: var(--space-2);
}

.filing-row--suppressed {
  opacity: 0.45;
}

.filing-row__status {
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}

.filing-row__body {
  flex: 1;
}

.filing-row__name {
  font: var(--weight-medium) 14px var(--font-body);
  color: var(--color-text-primary);
}

.filing-row__desc {
  font: var(--weight-regular) 12px var(--font-body);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.filing-row__info-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: var(--space-1);
  font-size: 14px;
  flex-shrink: 0;
  transition: color 120ms ease;
}

.filing-row__info-btn:hover {
  color: var(--color-purple-500);
}

/* ── Confidence Bar (DESIGN.md §5) ───────────────────────── */

.confidence-bar-track {
  height: 3px;
  background: var(--color-border);
  border-radius: 99px;
  overflow: hidden;
}

.confidence-bar-fill {
  height: 100%;
  background: var(--color-orange-400);
  border-radius: 99px;
  transition: width 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── Status Badge (DESIGN.md §5) ─────────────────────────── */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 4px 10px;
  border-radius: 99px;
  font: var(--weight-medium) 12px var(--font-body);
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}

.badge--danger {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
}

.badge--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning-text);
}

.badge--success {
  background: var(--color-success-bg);
  color: var(--color-success-text);
}

.badge--info {
  background: var(--color-info-bg);
  color: var(--color-info-text);
}

/* ── Section Header (DESIGN.md §5) ───────────────────────── */

.section-header {
  font: var(--weight-medium) var(--text-sm) var(--font-body);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-4);
}

/* ── Collapsible (DESIGN.md §5) ──────────────────────────── */

.collapsible__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: var(--space-4) 0;
  border-top: 0.5px solid var(--color-border);
}

.collapsible__arrow {
  transition: transform 200ms ease;
}

.collapsible__arrow--open {
  transform: rotate(180deg);
}

.collapsible__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 200ms ease;
}

.collapsible__body--open {
  max-height: 1000px;
}

/* ── Loading Skeleton (DESIGN.md §5) ─────────────────────── */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-2) 25%,
    var(--color-border) 50%,
    var(--color-surface-2) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s infinite;
  border-radius: 6px;
}

.skeleton--text {
  height: 14px;
  width: 80%;
}

.skeleton--title {
  height: 20px;
  width: 60%;
}

.skeleton--block {
  height: 80px;
  width: 100%;
}

/* ── Animations (DESIGN.md §6) ───────────────────────────── */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.animate-in {
  animation: fadeInUp 280ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* Stagger delays for sequential items */
.stagger-1 { animation-delay: 0ms; }
.stagger-2 { animation-delay: 60ms; }
.stagger-3 { animation-delay: 120ms; }
.stagger-4 { animation-delay: 180ms; }
.stagger-5 { animation-delay: 240ms; }
.stagger-6 { animation-delay: 300ms; }