@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/*
 * Yale University Color Palette
 * Primary: Yale Blue #00356b
 * Bright Blue: #286dc0
 * Light Blue: #63aaff
 * Warm Gray: #978d85
 * Light Gray bg: #f9f9f9
 * Accent Gold: #f9be00
 */

:root {
  --bg: #f4f4f2;
  --bg-secondary: #ededeb;
  --surface: #ffffff;
  --text: #111827;
  --text-secondary: #1f2937;
  --muted: #6b7280;
  --border: #ddd9d3;
  --border-light: #ebe8e3;

  /* Yale Primary Colors */
  --primary: #00356b;
  --primary-mid: #286dc0;
  --primary-light: #63aaff;
  --primary-pale: #e8f0fb;
  --primary-subtle: rgba(0,53,107,.07);

  /* Yale Accent */
  --accent: #bd8b13;          /* Yale gold – muted for readability */
  --accent-bright: #f9be00;   /* Yale gold – full saturation */
  --accent-hover: #a37710;

  /* Semantic colors (keeping semantic meaning, Yale-adjacent tones) */
  --green: #2f7d32;
  --red: #c62828;
  --amber: #bd8b13;
  --blue: #286dc0;

  /* Quote type colors – adjusted for Yale palette harmony */
  --full: #2f7d32;
  --partial: #bd8b13;
  --paraphrase: #0277bd;
  --allusion: #6a1b9a;
  --full-bg: rgba(47,125,50,.12);
  --partial-bg: rgba(189,139,19,.12);
  --paraphrase-bg: rgba(2,119,189,.12);
  --allusion-bg: rgba(106,27,154,.12);

  --radius: 10px;
  --radius-lg: 14px;
  --radius-sm: 7px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.05), 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.04), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.07), 0 4px 10px rgba(0,0,0,.05);
  --shadow-xl: 0 20px 40px rgba(0,0,0,.09), 0 8px 16px rgba(0,0,0,.05);

  --transition: .2s cubic-bezier(.4,0,.2,1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Header ─────────────────────────────────────────────────────────── */

.header {
  background: var(--primary);
  color: #ffffff;
  padding: 0 32px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 2px 12px rgba(0,53,107,.35);
  position: relative;
  z-index: 100;
}

/* Yale gold accent stripe at top */
.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-bright);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.header-logo {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.header-title {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: #ffffff;
}

.header-subtitle {
  font-size: .72rem;
  color: rgba(255,255,255,.65);
  font-weight: 500;
  letter-spacing: .02em;
}

.header nav {
  margin-left: auto;
  display: flex;
  gap: 4px;
}

.header nav a {
  color: rgba(255,255,255,.75);
  text-decoration: none;
  font-size: .84rem;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.header nav a:hover {
  color: #fff;
  background: rgba(255,255,255,.12);
}

.header nav a.active {
  color: #fff;
  background: rgba(255,255,255,.14);
}

.header nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--accent-bright);
  border-radius: 1px;
}

/* ── Buttons ────────────────────────────────────────────────────────── */

.btn {
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  border: none;
  font-size: .84rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: inherit;
  line-height: 1.4;
}

.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0,53,107,.25);
}

.btn-primary:hover:not(:disabled) {
  background: #004a96;
  box-shadow: 0 4px 12px rgba(0,53,107,.35);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1.5px solid var(--border);
}

.btn-ghost:hover {
  background: var(--bg);
  color: var(--text);
  border-color: #b8b3ac;
}

.btn-danger {
  background: var(--red);
  color: #fff;
  box-shadow: 0 2px 8px rgba(198,40,40,.25);
}

.btn-danger:hover {
  background: #b71c1c;
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--primary);
  color: #fff;
  border-left: 3px solid var(--accent-bright);
}

.btn-sm { padding: 5px 12px; font-size: .78rem; }
.btn-lg { padding: 12px 28px; font-size: .95rem; border-radius: var(--radius); }

/* ── Container ──────────────────────────────────────────────────────── */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
}

/* ── Cards ──────────────────────────────────────────────────────────── */

.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  padding: 24px;
  transition: var(--transition);
}

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

.card h2 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--primary-pale);
  color: var(--primary);
}

.card h3 {
  font-size: .8rem;
  font-weight: 700;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ── Forms ──────────────────────────────────────────────────────────── */

.field { margin-bottom: 18px; }

.field label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.field input, .field select, .field textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-family: inherit;
  color: var(--text);
  background: var(--surface);
  transition: var(--transition);
}

.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--primary-mid);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.field .hint {
  font-size: .74rem;
  color: var(--muted);
  margin-top: 6px;
}

.field .hint a { color: var(--primary-mid); text-decoration: none; }
.field .hint a:hover { text-decoration: underline; }

/* ── Modal ──────────────────────────────────────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  width: 90%;
  max-width: 600px;
  box-shadow: var(--shadow-xl);
  max-height: 90vh;
  overflow-y: auto;
  animation: modalIn .25s ease-out;
  border-top: 4px solid var(--primary);
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(.96) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary);
}

.modal label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  margin-bottom: 6px;
  margin-top: 18px;
  color: var(--text-secondary);
}

.modal label:first-of-type { margin-top: 0; }

.modal input, .modal textarea, .modal select {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-family: inherit;
  color: var(--text);
  transition: var(--transition);
}

.modal input:focus, .modal textarea:focus, .modal select:focus {
  outline: none;
  border-color: var(--primary-mid);
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.modal textarea { min-height: 200px; resize: vertical; }
.modal .actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 24px; }

/* ── Toast ──────────────────────────────────────────────────────────── */

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 14px 24px;
  border-radius: var(--radius);
  color: #fff;
  font-size: .88rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 1100;
  transition: opacity .3s;
  animation: toastIn .3s ease-out;
}

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

.toast-ok { background: var(--green); }
.toast-err { background: var(--red); }

/* ── Empty State ────────────────────────────────────────────────────── */

.empty-state { text-align: center; padding: 80px 20px; }
.empty-state .empty-icon { width: 80px; height: 80px; margin: 0 auto 20px; opacity: .25; }
.empty-state h2 { font-size: 1.3rem; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.empty-state p { color: var(--muted); margin-bottom: 24px; font-size: .95rem; max-width: 400px; margin-left: auto; margin-right: auto; }

/* ── Loading ────────────────────────────────────────────────────────── */

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: var(--muted);
  font-size: .95rem;
  gap: 12px;
}

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

.spinner {
  width: 22px;
  height: 22px;
  border: 2.5px solid var(--border);
  border-top-color: var(--primary-mid);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

/* ── Type badges ────────────────────────────────────────────────────── */

.type-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.type-full { background: rgba(47,125,50,.12); color: var(--full); }
.type-partial { background: rgba(189,139,19,.12); color: var(--partial); }
.type-paraphrase { background: rgba(2,119,189,.12); color: var(--paraphrase); }
.type-allusion { background: rgba(106,27,154,.12); color: var(--allusion); }

/* ── Type bar ───────────────────────────────────────────────────────── */

.type-bar {
  display: flex;
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  background: var(--bg-secondary);
}

.type-bar div { min-width: 3px; transition: width .4s ease; }

.type-legend { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.type-legend-item { display: flex; align-items: center; gap: 5px; font-size: .74rem; color: var(--muted); }
.type-legend-swatch { width: 10px; height: 10px; border-radius: 3px; }

/* ── Scrollbar ──────────────────────────────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #c5bfb8; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #9e9891; }

/* ── Selection ──────────────────────────────────────────────────────── */

::selection { background: rgba(40,109,192,.2); }