/* ============================================================
   PLATFORM v2 — Design System (matches old frontend)
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ── Tokens ─────────────────────────────────────────────────── */
:root {
  /* Primary (Indigo) */
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-200: #c7d2fe;
  --color-primary-500: #6366f1;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;

  /* Semantic */
  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-danger: #ef4444;
  --color-danger-light: #fee2e2;

  /* Metric colors */
  --color-tech: #6366f1;
  --color-tech-light: #eef2ff;
  --color-lq: #10b981;
  --color-lq-light: #d1fae5;
  --color-salary: #ef4444;
  --color-salary-light: #fee2e2;
  --color-vacancies: #f59e0b;
  --color-vacancies-light: #fef3c7;

  /* Neutrals (Slate) */
  --color-gray-50: #f8fafc;
  --color-gray-100: #f1f5f9;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Surface */
  --color-surface: #fff;
  --color-bg: #f8fafc;

  /* Layout */
  --sidebar-width: 240px;
  --sidebar-bg: #121318;
  --page-padding: 2rem;
  --content-max-width: 1400px;

  /* Cards */
  --card-radius: 16px;
  --card-padding: 1.5rem;
  --card-border: 1px solid var(--color-gray-100);
  --card-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --card-shadow-hover: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

/* ── Dark Theme ─────────────────────────────────────────────── */
[data-theme="dark"] {
  --color-primary-50: rgba(99,102,241,0.1);
  --color-primary-100: rgba(99,102,241,0.15);
  --color-primary-200: rgba(99,102,241,0.25);
  --color-success-light: rgba(16,185,129,0.15);
  --color-warning-light: rgba(245,158,11,0.15);
  --color-danger-light: rgba(239,68,68,0.15);
  --color-tech-light: rgba(99,102,241,0.15);
  --color-lq-light: rgba(16,185,129,0.15);
  --color-salary-light: rgba(239,68,68,0.15);
  --color-vacancies-light: rgba(245,158,11,0.15);
  --color-gray-50: #0f172a;
  --color-gray-100: #1e293b;
  --color-gray-200: #334155;
  --color-gray-300: #475569;
  --color-gray-400: #94a3b8;
  --color-gray-500: #94a3b8;
  --color-gray-600: #cbd5e1;
  --color-gray-700: #e2e8f0;
  --color-gray-800: #f1f5f9;
  --color-gray-900: #f8fafc;
  --color-surface: #1e293b;
  --color-bg: #0b0f19;
  --sidebar-bg: #0a0b0f;
  --card-border: 1px solid #334155;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.2), 0 1px 2px rgba(0,0,0,0.15);
  --card-shadow-hover: 0 4px 6px -1px rgba(0,0,0,0.3), 0 2px 4px -2px rgba(0,0,0,0.2);
  color-scheme: dark;
}

/* ── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-gray-800);
  background: var(--color-bg);
  transition: background var(--transition-normal), color var(--transition-normal);
}
a { color: var(--color-primary-600); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-700); text-decoration: underline; }

/* Skip link */
.skip-link {
  position: absolute; top: -100%; left: 16px;
  background: var(--color-primary-600); color: #fff;
  padding: 8px 16px; border-radius: 8px; z-index: 9999;
}
.skip-link:focus { top: 8px; }

/* ── Layout ─────────────────────────────────────────────────── */
.app-layout { display: flex; min-height: 100vh; }

/* ── Sidebar ────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  position: fixed;
  top: 0; left: 0; height: 100vh;
  overflow-y: auto;
  z-index: 50;
  display: flex;
  flex-direction: column;
}
.sidebar-header {
  padding: 1.75rem 1.5rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.sidebar-logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.025em;
  text-decoration: none;
}
.sidebar-logo:hover { text-decoration: none; color: #fff; }
.sidebar-logo span { color: var(--accent); transition: color 400ms ease; }
.sidebar-close {
  display: none;
  background: none; border: none; color: #94a3b8;
  cursor: pointer; padding: 4px; border-radius: 6px;
}
.sidebar-close:hover { color: #fff; }

.sidebar-nav {
  flex: 1;
  padding: 0.5rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: 10px;
  color: #94a3b8;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}
.nav-link:hover {
  color: #e2e8f0;
  background: rgba(255,255,255,0.06);
  text-decoration: none;
}
.nav-link.active {
  color: #fff;
  background: var(--accent);
  font-weight: 600;
}
.nav-link.active:hover { background: var(--accent); filter: brightness(1.15); }

.nav-icon {
  width: 20px; height: 20px;
  flex-shrink: 0;
  opacity: 0.7;
}
.nav-link.active .nav-icon { opacity: 1; }

.sidebar-footer {
  padding: 0.75rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.theme-toggle {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.625rem 0.75rem; border-radius: 10px;
  color: #94a3b8; font-size: 0.8125rem; font-weight: 500;
  background: none; border: none; cursor: pointer;
  width: 100%; font-family: inherit;
  transition: all var(--transition-fast);
}
.theme-toggle:hover { color: #e2e8f0; background: rgba(255,255,255,0.06); }

/* ── Mobile Header ──────────────────────────────────────────── */
.mobile-header { display: none; }
.sidebar-overlay { display: none; }

/* ── Main Content ───────────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-width);
  padding: var(--page-padding);
  flex: 1;
  min-width: 0;
}

/* ── Filter Bar ─────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.filter-bar.hidden { display: none; }
.filter-bar__metric {
  display: flex;
  align-items: center;
  gap: 8px;
}
.filter-bar__metric label {
  color: var(--color-gray-500);
  font-size: 0.8125rem;
  white-space: nowrap;
}
.filter-bar__metric select {
  padding: 6px 12px;
  border: var(--card-border);
  border-radius: 8px;
  font-size: 0.8125rem;
  background: var(--color-surface);
  color: var(--color-gray-800);
  font-family: inherit;
}
.filter-bar__actions { display: flex; gap: 8px; }

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  padding: 0.5rem 1rem;
  border-radius: 10px;
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}
.btn--outline {
  background: var(--color-surface);
  border: var(--card-border);
  color: var(--color-gray-600);
}
.btn--outline:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-600);
  border-color: var(--color-primary-200);
}
.btn--primary { background: var(--color-primary-600); color: #fff; }
.btn--primary:hover { background: var(--color-primary-700); }

/* ── Page ────────────────────────────────────────────────────── */
.page { max-width: var(--content-max-width); }
.page-header { margin-bottom: 2rem; }
.page-title {
  font-size: 1.5rem; font-weight: 700;
  color: var(--color-gray-900);
  letter-spacing: -0.025em;
}
.page-subtitle {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-top: 0.25rem;
}

/* ── Cards ───────────────────────────────────────────────────── */
.card {
  background: var(--color-surface);
  border: var(--card-border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: box-shadow var(--transition-normal);
}
.card:hover { box-shadow: var(--card-shadow-hover); }
.card-body { padding: var(--card-padding); }
.card-title {
  font-size: 0.8125rem; font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: 1.25rem;
}

/* ── Breadcrumbs ─────────────────────────────────────────────── */
.breadcrumbs {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.8125rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.breadcrumbs__item {
  color: var(--color-primary-600);
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 6px;
  transition: background var(--transition-fast);
}
.breadcrumbs__item:hover { background: var(--color-primary-50); text-decoration: none; }
.breadcrumbs__sep { color: var(--color-gray-400); }
.breadcrumbs__current { color: var(--color-gray-800); font-weight: 600; }

/* ── Metric Accent (set by JS on body) ───────────────────────── */
body { --accent: var(--color-tech); --accent-light: var(--color-tech-light); transition: --accent 400ms, --accent-light 400ms; }
body[data-metric="tech"]      { --accent: var(--color-tech);      --accent-light: var(--color-tech-light); }
body[data-metric="lq"]        { --accent: var(--color-lq);        --accent-light: var(--color-lq-light); }
body[data-metric="salary"]    { --accent: var(--color-salary);    --accent-light: var(--color-salary-light); }
body[data-metric="vacancies"] { --accent: var(--color-vacancies); --accent-light: var(--color-vacancies-light); }

/* Elements that follow the accent */
.nav-link.active { background: var(--accent); transition: background 400ms ease; }
.nav-link.active:hover { background: var(--accent); filter: brightness(1.1); }
.btn--primary { background: var(--accent); transition: background 400ms ease; }
.btn--primary:hover { background: var(--accent); filter: brightness(0.9); }
.breadcrumbs__item { color: var(--accent); }
.breadcrumbs__item:hover { background: var(--accent-light); }
.filter-bar__metric select:focus { outline-color: var(--accent); }
.kpi-card.active { border-color: var(--accent); background: var(--accent-light); transition: border-color 400ms ease, background 400ms ease; }
.map-region:hover { stroke: var(--accent); }

/* ── Animations ──────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes fadeOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-8px); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

/* Animate blocks appearing */
.anim-fade-in {
  animation: fadeInUp var(--transition-slow) ease both;
}
.anim-scale-in {
  animation: scaleIn var(--transition-slow) ease both;
}
.anim-fade-out {
  animation: fadeOut 200ms ease both;
}

/* Page transition */
#app {
  animation: fadeIn 250ms ease;
}
#app.transitioning {
  animation: fadeOut 150ms ease both;
}

/* Staggered children (set --i via JS) */
.anim-stagger > * {
  opacity: 0;
  animation: fadeInUp 350ms ease both;
  animation-delay: calc(var(--i, 0) * 60ms);
}

/* Map wrapper */
.map-wrapper { animation: scaleIn 400ms ease both; }

/* Chart card */
.chart-card { animation: fadeInUp 350ms ease both; }

/* Treemap section */
.treemap-section { animation: fadeInUp 400ms ease both; }

/* Top table */
.top-table { animation: fadeInUp 400ms ease both; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); transition: transform var(--transition-slow); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-close { display: block; }

  .mobile-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem 1.25rem;
    background: var(--sidebar-bg);
    position: sticky; top: 0; z-index: 40;
  }
  .mobile-burger {
    background: none; border: none; cursor: pointer; padding: 4px;
    display: flex; flex-direction: column; gap: 5px;
  }
  .mobile-burger span {
    width: 22px; height: 2px; background: #94a3b8; border-radius: 2px;
  }
  .mobile-title { color: #fff; font-weight: 700; font-size: 1rem; }

  .sidebar-overlay.visible {
    display: block;
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 45;
  }

  .main-content { margin-left: 0; padding: 1.25rem; }
}