/* ============================================================
   assets/css/main.css  —  Layout, Sidebar, Typography
   ============================================================ */

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

:root {
  --bg:          #f4f6fb;
  --sidebar:     #ffffff;
  --card:        #ffffff;
  --border:      #e5e9f2;
  --border-lt:   #f0f3fa;
  --text:        #1e2a3a;
  --text-sub:    #6b7a99;
  --text-muted:  #9ba8c0;
  --accent:      #3b6ef8;
  --accent-lt:   #eef2ff;
  --green:       #16a34a;
  --green-bg:    #f0fdf4;
  --amber:       #d97706;
  --amber-bg:    #fffbeb;
  --red:         #dc2626;
  --red-bg:      #fef2f2;
  --purple:      #7c3aed;
  --purple-bg:   #f5f3ff;
  --blue:        #0ea5e9;
  --blue-bg:     #f0f9ff;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:   0 4px 16px rgba(0,0,0,.08);
  --radius:      12px;
  --radius-sm:   8px;
  --sidebar-w:   228px;
  --font:        'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { text-decoration: none; color: inherit; }

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

.main-content {
  flex: 1;
  padding: 32px 36px;
  overflow-y: auto;
  max-height: 100vh;
}

/* ── Sidebar ──────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: sticky;
  top: 0;
  flex-shrink: 0;
}

.sidebar-brand {
  padding: 24px 20px 18px;
  border-bottom: 1px solid var(--border);
}

.brand-name {
  font-size: 17px;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -0.4px;
}

.brand-sub {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 2px;
  letter-spacing: 0.8px;
  text-transform: uppercase;
}

/* ── Sidebar Nav ──────────────────────────────────────────── */
.sidebar-nav {
  flex: 1;
  padding: 12px 10px;
  overflow-y: auto;
}

.nav-group-label {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 700;
  padding: 10px 10px 4px;
  margin-top: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border-radius: 9px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-sub);
  margin-bottom: 1px;
  transition: background 0.12s, color 0.12s;
  cursor: pointer;
}

.nav-item:hover {
  background: var(--border-lt);
  color: var(--text);
}

.nav-item.active {
  background: var(--accent-lt);
  color: var(--accent);
  font-weight: 700;
}

.nav-icon {
  font-size: 15px;
  width: 20px;
  text-align: center;
}

/* ── Sidebar Footer ───────────────────────────────────────── */
.sidebar-footer {
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lang-toggle {
  background: #f1f5f9;
  border-radius: 10px;
  padding: 4px;
  display: flex;
  gap: 3px;
}

.lang-btn {
  flex: 1;
  padding: 6px 0;
  border-radius: 7px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  transition: all 0.12s;
}

.lang-btn.active {
  background: #fff;
  color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}

.user-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent-lt);
  color: var(--accent);
  font-weight: 800;
  font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.user-name { flex: 1; color: var(--text-sub); font-weight: 500; }

.logout-link { color: var(--red); font-size: 11px; }
.logout-link:hover { text-decoration: underline; }

/* ── Topbar ───────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 26px;
}

.page-title { font-size: 22px; font-weight: 800; color: var(--text); }
.page-subtitle { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* ── Utility ──────────────────────────────────────────────── */
.flex { display: flex; }
.gap-10 { gap: 10px; }
.gap-14 { gap: 14px; }
.gap-18 { gap: 18px; }
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.wrap { flex-wrap: wrap; }