/* ==========================================================================
   BI Copilot - stylesheet
   Design tokens: indigo primary, light slate background, white cards,
   monospace figures for data, geometric display face for headings.
   Pure CSS only - no JavaScript anywhere in this file or the app.
   ========================================================================== */

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

:root {
  --ink: #0f172a;
  --body-text: #475569;
  --muted: #94a3b8;
  --bg: #f6f7fb;
  --card: #ffffff;
  --border: #e5e7eb;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #eef2ff;
  --sky: #0ea5e9;
  --positive: #16a34a;
  --positive-bg: #f0fdf4;
  --negative: #dc2626;
  --negative-bg: #fef2f2;
  --amber: #d97706;
  --amber-bg: #fffbeb;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px -12px rgba(15, 23, 42, 0.10);
  --sidebar-w: 248px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--body-text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 15px;
  line-height: 1.55;
}

h1, h2, h3, h4 {
  font-family: 'Sora', 'Inter', sans-serif;
  color: var(--ink);
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

h1 { font-size: 1.7rem; font-weight: 700; }
h2 { font-size: 1.25rem; font-weight: 700; }
h3 { font-size: 1.02rem; font-weight: 600; }

p { margin: 0 0 10px; }

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

.mono { font-family: 'JetBrains Mono', monospace; }

/* ---------------------------------------------------------------------- */
/* Public layout (landing / login / signup)                               */
/* ---------------------------------------------------------------------- */
.public-shell { min-height: 100vh; display: flex; flex-direction: column; }

.public-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 40px; border-bottom: 1px solid var(--border);
  background: var(--card);
}

.public-nav a { margin-left: 22px; font-weight: 600; color: var(--ink); font-size: 0.92rem; }
.public-nav a.cta {
  background: var(--primary); color: #fff; padding: 9px 18px; border-radius: 999px;
  transition: background 0.15s ease;
}
.public-nav a.cta:hover { background: var(--primary-dark); text-decoration: none; }

.brand { display: flex; align-items: center; gap: 10px; font-family: 'Sora', sans-serif; font-weight: 700; font-size: 1.1rem; color: var(--ink); }
.brand-mark { display: flex; align-items: flex-end; gap: 3px; height: 20px; }
.brand-mark span { width: 4px; background: var(--primary); border-radius: 2px; display: block; }
.brand-mark span:nth-child(1) { height: 40%; }
.brand-mark span:nth-child(2) { height: 75%; background: var(--sky); }
.brand-mark span:nth-child(3) { height: 100%; }
.brand-mark span:nth-child(4) { height: 60%; background: var(--sky); }

.hero {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: 80px 40px; text-align: center;
  background:
    radial-gradient(circle at 15% 20%, rgba(79,70,229,0.08), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(14,165,233,0.08), transparent 40%);
}
.hero-inner { max-width: 720px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 0.78rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--primary);
  background: var(--primary-light); padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { font-size: 2.6rem; line-height: 1.15; margin-bottom: 18px; }
.hero p.lead { font-size: 1.08rem; color: var(--body-text); max-width: 560px; margin: 0 auto 30px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 10px; font-weight: 600; font-size: 0.95rem;
  border: 1px solid transparent; cursor: pointer; transition: all 0.15s ease;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); text-decoration: none; }
.btn-secondary { background: #fff; color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }
.btn-block { width: 100%; }
.btn-sm { padding: 7px 14px; font-size: 0.85rem; border-radius: 8px; }

.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px; max-width: 980px; margin: 60px auto 0; padding: 0 40px;
}
.feature-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; text-align: left; box-shadow: var(--shadow);
}
.feature-card .icon-dot {
  width: 34px; height: 34px; border-radius: 9px; background: var(--primary-light);
  color: var(--primary); display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-family: 'Sora', sans-serif; margin-bottom: 12px;
}

.auth-shell { flex: 1; display: flex; align-items: center; justify-content: center; padding: 40px; }
.auth-card {
  width: 100%; max-width: 400px; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 34px;
}
.auth-card h1 { font-size: 1.5rem; margin-bottom: 4px; }
.auth-card .subtitle { color: var(--muted); margin-bottom: 24px; font-size: 0.92rem; }

/* ---------------------------------------------------------------------- */
/* Forms                                                                   */
/* ---------------------------------------------------------------------- */
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 0.83rem; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.field input[type="text"],
.field input[type="email"],
.field input[type="password"],
.field input[type="number"],
.field input[type="file"],
.field select,
.field textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 9px;
  font-size: 0.92rem; font-family: inherit; background: #fff; color: var(--ink);
  transition: border-color 0.15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light);
}
.field .hint { font-size: 0.78rem; color: var(--muted); margin-top: 5px; }
.form-error {
  background: var(--negative-bg); color: var(--negative); border: 1px solid #fecaca;
  padding: 10px 14px; border-radius: 9px; font-size: 0.87rem; margin-bottom: 16px;
}
.form-success {
  background: var(--positive-bg); color: var(--positive); border: 1px solid #bbf7d0;
  padding: 10px 14px; border-radius: 9px; font-size: 0.87rem; margin-bottom: 16px;
}
.inline-form { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.inline-form .field { margin-bottom: 0; min-width: 140px; }

/* ---------------------------------------------------------------------- */
/* App shell (sidebar + topbar)                                           */
/* ---------------------------------------------------------------------- */
.app-shell { display: flex; min-height: 100vh; }

#nav-toggle { display: none; }

.sidebar {
  width: var(--sidebar-w); flex-shrink: 0; background: var(--card);
  border-right: 1px solid var(--border); padding: 22px 16px; position: sticky; top: 0;
  height: 100vh; overflow-y: auto;
}
.sidebar .brand { padding: 0 8px 22px; }
.nav-group { margin-bottom: 18px; }
.nav-group-label {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--muted); padding: 0 10px; margin-bottom: 8px;
}
.nav-link {
  display: flex; align-items: center; gap: 10px; padding: 9px 10px; border-radius: 9px;
  color: var(--body-text); font-weight: 500; font-size: 0.89rem; margin-bottom: 2px;
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-link:hover { background: var(--primary-light); color: var(--primary); text-decoration: none; }
.nav-link.active { background: var(--primary-light); color: var(--primary); font-weight: 600; }
.nav-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--border); flex-shrink: 0; }
.nav-link.active .nav-dot, .nav-link:hover .nav-dot { background: var(--primary); }

.main-col { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 30px; border-bottom: 1px solid var(--border); background: var(--card);
  position: sticky; top: 0; z-index: 5;
}
.topbar .page-title { font-family: 'Sora', sans-serif; font-weight: 700; font-size: 1.05rem; color: var(--ink); }
.topbar .page-subtitle { font-size: 0.8rem; color: var(--muted); margin-top: 1px; }
.topbar-right { display: flex; align-items: center; gap: 14px; }
.dataset-chip {
  display: flex; align-items: center; gap: 7px; background: var(--bg); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 999px; font-size: 0.78rem; color: var(--body-text);
}
.dataset-chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--positive); }
.user-chip { font-size: 0.85rem; color: var(--body-text); }
.hamburger-label { display: none; }

.content { padding: 26px 30px 60px; max-width: 1320px; width: 100%; }

/* ---------------------------------------------------------------------- */
/* Cards / grids / KPIs                                                    */
/* ---------------------------------------------------------------------- */
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); margin-bottom: 20px;
}
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.card-header h2 { margin: 0; }
.card-header .muted-note { font-size: 0.8rem; color: var(--muted); }

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.kpi-card {
  background: var(--card); border: 1px solid var(--border); border-left: 4px solid var(--primary);
  border-radius: var(--radius); padding: 18px 20px; box-shadow: var(--shadow);
}
.kpi-card.positive { border-left-color: var(--positive); }
.kpi-card.negative { border-left-color: var(--negative); }
.kpi-label { font-size: 0.74rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.kpi-value { font-family: 'JetBrains Mono', monospace; font-size: 1.65rem; font-weight: 700; color: var(--ink); }
.kpi-sub { font-size: 0.8rem; margin-top: 6px; color: var(--muted); }
.kpi-sub.positive { color: var(--positive); }
.kpi-sub.negative { color: var(--negative); }

/* ---------------------------------------------------------------------- */
/* Badges / progress / tags                                                */
/* ---------------------------------------------------------------------- */
.badge {
  display: inline-flex; align-items: center; gap: 5px; padding: 3px 10px; border-radius: 999px;
  font-size: 0.74rem; font-weight: 700; letter-spacing: 0.02em;
}
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-positive { background: var(--positive-bg); color: var(--positive); }
.badge-negative { background: var(--negative-bg); color: var(--negative); }
.badge-amber { background: var(--amber-bg); color: var(--amber); }
.badge-muted { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }

.progress-track { background: var(--bg); border-radius: 999px; height: 8px; overflow: hidden; border: 1px solid var(--border); }
.progress-fill { height: 100%; background: var(--primary); border-radius: 999px; }
.progress-fill.positive { background: var(--positive); }
.progress-fill.negative { background: var(--negative); }
.progress-fill.amber { background: var(--amber); }

.score-ring-wrap { display: flex; align-items: center; gap: 20px; }
.score-number { font-family: 'JetBrains Mono', monospace; font-size: 2.3rem; font-weight: 700; color: var(--ink); }
.score-number span { font-size: 1.1rem; color: var(--muted); font-weight: 500; }

/* ---------------------------------------------------------------------- */
/* Tables                                                                   */
/* ---------------------------------------------------------------------- */
table.data-table { width: 100%; border-collapse: collapse; font-size: 0.87rem; }
table.data-table th {
  text-align: left; padding: 10px 12px; font-size: 0.72rem; letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--muted); border-bottom: 1px solid var(--border); font-weight: 700;
}
table.data-table td { padding: 11px 12px; border-bottom: 1px solid var(--border); color: var(--body-text); }
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr:hover td { background: var(--bg); }
.table-scroll { overflow-x: auto; }

/* ---------------------------------------------------------------------- */
/* Chat / Copilot                                                          */
/* ---------------------------------------------------------------------- */
.chat-thread { display: flex; flex-direction: column; gap: 16px; margin-bottom: 20px; }
.chat-bubble { max-width: 78%; padding: 13px 16px; border-radius: 14px; font-size: 0.9rem; line-height: 1.55; white-space: pre-wrap; }
.chat-bubble.user { align-self: flex-end; background: var(--primary); color: #fff; border-bottom-right-radius: 4px; }
.chat-bubble.ai { align-self: flex-start; background: var(--bg); color: var(--ink); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.chat-source { font-size: 0.7rem; color: var(--muted); margin-top: 6px; }
.suggested-chip {
  display: inline-block; margin: 4px 6px 0 0; padding: 7px 13px; border-radius: 999px;
  background: var(--bg); border: 1px solid var(--border); font-size: 0.82rem; color: var(--body-text);
  transition: all 0.15s ease;
}
.suggested-chip:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }

/* ---------------------------------------------------------------------- */
/* Upload dropzone                                                         */
/* ---------------------------------------------------------------------- */
.dropzone {
  border: 2px dashed var(--border); border-radius: var(--radius); padding: 48px 24px;
  text-align: center; background: var(--bg); transition: border-color 0.15s ease, background 0.15s ease;
}
.dropzone:hover, .dropzone:focus-within { border-color: var(--primary); background: var(--primary-light); }
.dropzone .icon { font-size: 2rem; margin-bottom: 10px; }
.dropzone input[type="file"] { margin: 14px auto 0; display: block; }

/* ---------------------------------------------------------------------- */
/* Empty / error states                                                    */
/* ---------------------------------------------------------------------- */
.empty-state { text-align: center; padding: 70px 20px; color: var(--muted); }
.empty-state .icon-dot {
  width: 54px; height: 54px; border-radius: 16px; background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; font-size: 1.4rem;
}
.empty-state h2 { color: var(--ink); margin-bottom: 8px; }
.empty-state p { max-width: 380px; margin: 0 auto 18px; }

/* ---------------------------------------------------------------------- */
/* Findings / lists                                                        */
/* ---------------------------------------------------------------------- */
.finding-item { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.finding-item:last-child { border-bottom: none; }
.finding-priority { flex-shrink: 0; width: 78px; }
.finding-body h3 { margin-bottom: 4px; }
.finding-body p { margin-bottom: 4px; font-size: 0.88rem; }
.finding-action { font-size: 0.85rem; color: var(--primary); font-weight: 600; }

.details-block { border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 10px; overflow: hidden; }
.details-block summary {
  padding: 12px 16px; cursor: pointer; font-weight: 600; font-size: 0.88rem; color: var(--ink);
  background: var(--bg); list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.details-block summary::-webkit-details-marker { display: none; }
.details-block summary::after { content: "+"; font-size: 1.1rem; color: var(--muted); }
.details-block[open] summary::after { content: "\2212"; }
.details-block .details-content { padding: 14px 16px; }

.chart-card { padding: 20px; }
.chart-svg { width: 100%; height: auto; display: block; }

.recommendation-item { padding: 14px 0; border-bottom: 1px solid var(--border); }
.recommendation-item:last-child { border-bottom: none; }
.recommendation-item .num {
  display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px;
  border-radius: 50%; background: var(--primary-light); color: var(--primary); font-weight: 700;
  font-size: 0.78rem; margin-right: 8px;
}

.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }

/* ---------------------------------------------------------------------- */
/* Responsive                                                              */
/* ---------------------------------------------------------------------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .sidebar {
    position: fixed; left: 0; top: 0; z-index: 20; transform: translateX(-100%);
    transition: transform 0.2s ease; box-shadow: 0 0 0 9999px rgba(15,23,42,0);
  }
  #nav-toggle:checked ~ .app-shell .sidebar,
  #nav-toggle:checked + label + .app-shell .sidebar { transform: translateX(0); }
  .hamburger-label {
    display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px;
    border-radius: 9px; border: 1px solid var(--border); cursor: pointer; font-size: 1.1rem;
  }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .content { padding: 20px 16px 50px; }
  .topbar { padding: 14px 16px; }
  .hero h1 { font-size: 2rem; }
  .public-header { padding: 16px 20px; }
}

footer.public-footer { text-align: center; padding: 24px; color: var(--muted); font-size: 0.8rem; border-top: 1px solid var(--border); }