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

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --faint: #94a3b8;

  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-bg: #eef2ff;
  --accent-border: #c7d2fe;

  --green: #059669;
  --green-bg: #ecfdf5;
  --red: #dc2626;
  --red-bg: #fef2f2;
  --amber: #d97706;
  --amber-bg: #fffbeb;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.04), 0 1px 3px rgba(15,23,42,0.06);
  --shadow-md: 0 4px 12px rgba(15,23,42,0.06), 0 2px 4px rgba(15,23,42,0.04);
  --shadow-lg: 0 20px 40px rgba(15,23,42,0.10), 0 8px 16px rgba(15,23,42,0.06);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

[data-theme="dark"] {
  --bg: #0b0e14;
  --surface: #12161f;
  --surface-2: #171c27;
  --border: #232a38;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --faint: #64748b;
  --accent-bg: rgba(79,70,229,0.15);
  --accent-border: rgba(99,102,241,0.35);
  --green-bg: rgba(5,150,105,0.12);
  --red-bg: rgba(220,38,38,0.12);
  --amber-bg: rgba(217,119,6,0.12);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: 22px; margin-bottom: 20px; }
h3 { font-size: 16px; margin-bottom: 14px; }

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

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 20px; }
::-webkit-scrollbar-track { background: transparent; }

/* ---- LAYOUT ---- */
.app {
  display: flex;
  min-height: 100vh;
}
.sidebar {
  width: 250px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
}
.sidebar-header {
  padding: 22px 22px 18px;
  border-bottom: 1px solid var(--border);
}
.sidebar-header strong {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.sidebar-logo { display: block; width: 100%; max-width: 190px; height: auto; }
.main {
  flex: 1;
  min-width: 0;
}
.content {
  padding: 32px 36px;
  max-width: 1200px;
  margin: 0 auto;
}
[data-page] { display: none; }
[data-page].active { display: block; }

/* ---- NAV ---- */
.nav {
  padding: 14px 12px;
  flex: 1;
  overflow-y: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  font-size: 13.5px;
  color: var(--muted);
  transition: background 0.15s ease, color 0.15s ease;
  margin-bottom: 2px;
}
.nav-item:hover { background: var(--surface-2); color: var(--text); }
.nav-item.active { background: var(--accent-bg); color: var(--accent); font-weight: 600; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: var(--font);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--surface-2);
  color: var(--text);
}
.btn:hover { filter: brightness(0.97); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover { background: var(--surface-2); }
.btn-sm { padding: 6px 12px; font-size: 12.5px; }

/* ---- FORMS ---- */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font);
  font-size: 13.5px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-bg);
}
.form-group textarea { min-height: 90px; resize: vertical; }

/* ---- CARDS ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

/* ---- METRICS ---- */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.metric-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.m-label { font-size: 12.5px; color: var(--muted); font-weight: 600; margin-bottom: 8px; }
.m-value { font-size: 26px; font-weight: 800; letter-spacing: -0.02em; }

/* ---- TABLES ---- */
table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 16px;
  box-shadow: var(--shadow-sm);
}
thead th {
  text-align: left;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 700;
  background: var(--surface-2);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13.5px;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }
.row-highlight td { background: var(--accent-bg); font-weight: 600; }

/* ---- MODAL ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.45);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  padding: 20px;
}
.modal {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  width: 100%;
  max-width: 480px;
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

/* ---- LOGIN ---- */
#login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(circle at 20% 20%, var(--accent-bg), transparent 45%),
    radial-gradient(circle at 80% 80%, var(--accent-bg), transparent 45%),
    var(--bg);
}
.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow-lg);
}
.login-box h1 { font-size: 22px; margin-bottom: 4px; }
.login-logo { display: block; width: 100%; max-width: 260px; height: auto; margin: 0 auto 12px; }

/* ---- MISC ---- */
.msg-error {
  background: var(--red-bg);
  border: 1px solid rgba(220,38,38,0.25);
  color: var(--red);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  font-size: 13px;
}