/* ==========================================================
   Design system — modern, minimal, no external fonts/icons.
   System font stack + hand-drawn SVG icons only (no CDN dependency).
   ========================================================== */

:root {
  --color-bg: #f5f6fb;
  --color-bg-alt: #edeef7;
  --color-surface: #ffffff;
  --color-surface-2: #fbfbfe;
  --color-border: #e6e8f2;
  --color-border-strong: #d7d9e8;
  --color-text: #14152b;
  --color-text-muted: #676b84;
  --color-text-faint: #9598ae;

  --color-accent: #5b5bf0;
  --color-accent-hover: #4747d6;
  --color-accent-strong: #3d3dbf;
  --color-accent-soft: #ecebff;
  --color-accent-2: #8b5cf6;

  --color-success: #16a34a;
  --color-success-soft: #e6f8ed;
  --color-warning: #d97706;
  --color-warning-soft: #fef3e0;
  --color-danger: #dc2626;
  --color-danger-soft: #fdeaea;

  --sidebar-bg: linear-gradient(180deg, #15162c 0%, #1c1d40 100%);
  --sidebar-text: #b3b6d6;
  --sidebar-text-active: #ffffff;
  --sidebar-border: rgba(255, 255, 255, 0.07);
  --sidebar-hover: rgba(255, 255, 255, 0.06);
  --sidebar-active: linear-gradient(135deg, #5b5bf0 0%, #8b5cf6 100%);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 22px;

  --shadow-sm: 0 1px 2px rgba(20, 20, 45, 0.05), 0 1px 1px rgba(20, 20, 45, 0.03);
  --shadow-md: 0 10px 28px -6px rgba(25, 25, 60, 0.12), 0 2px 8px rgba(25, 25, 60, 0.06);
  --shadow-lg: 0 24px 48px -12px rgba(20, 20, 55, 0.22);
  --shadow-glow: 0 0 0 4px var(--color-accent-soft);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;

  --sidebar-width: 252px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--color-accent-soft); color: var(--color-accent-strong); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border-strong); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-faint); }

h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.015em; }
h1 { font-size: 23px; }
h2 { font-size: 16px; }
h3 { font-size: 13.5px; }
p { margin: 0; }

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

button {
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
}

/* ---------- App shell ---------- */

#app { min-height: 100%; }

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar-bg);
  padding: var(--space-5) var(--space-3);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: 50;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  color: var(--sidebar-text-active);
  padding: 0 var(--space-2) var(--space-6);
  letter-spacing: -0.01em;
}

.sidebar-brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--sidebar-active);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 4px 14px -2px rgba(91, 91, 240, 0.55);
}
.sidebar-brand-mark svg { width: 17px; height: 17px; color: #fff; }

.sidebar-brand span.dim { color: var(--sidebar-text); font-weight: 500; }

.nav-group { margin-bottom: var(--space-5); }

.nav-group-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(179, 182, 214, 0.55);
  padding: 0 var(--space-3);
  margin-bottom: var(--space-2);
  font-weight: 700;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  font-size: 13.5px;
  font-weight: 500;
  margin-bottom: 2px;
  transition: background 0.14s ease, color 0.14s ease;
}

.nav-link:hover { background: var(--sidebar-hover); color: var(--sidebar-text-active); }

.nav-link.active {
  background: var(--sidebar-active);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 6px 16px -4px rgba(91, 91, 240, 0.5);
}

.nav-link svg { width: 16px; height: 16px; flex-shrink: 0; }

.sidebar-footer {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--sidebar-border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--sidebar-active);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 12.5px;
  flex-shrink: 0;
}

.sidebar-user-block { flex: 1; min-width: 0; }
.sidebar-user {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--sidebar-text-active);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-user-role {
  font-size: 11px;
  color: var(--sidebar-text);
}

.btn-logout {
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  padding: 8px;
  color: var(--sidebar-text);
  flex-shrink: 0;
  display: flex;
}
.btn-logout:hover { background: var(--sidebar-hover); color: #fff; }
.btn-logout svg { width: 16px; height: 16px; }

.topbar {
  display: none;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 40;
}
.topbar-toggle {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}
.topbar-toggle svg { width: 18px; height: 18px; }
.sidebar-backdrop { display: none; }

.main {
  padding: var(--space-6) var(--space-8);
  max-width: 1320px;
  width: 100%;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  gap: var(--space-4);
  flex-wrap: wrap;
}

.page-header p { color: var(--color-text-muted); margin-top: 4px; }

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .app-shell { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar-width);
    transform: translateX(-100%);
    transition: transform 0.22s ease;
  }
  body.sidebar-open .sidebar { transform: translateX(0); box-shadow: var(--shadow-lg); }
  body.sidebar-open .sidebar-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(15, 15, 35, 0.45);
    z-index: 45;
  }
  .topbar { display: flex; }
  .main { padding: var(--space-4) var(--space-4) var(--space-8); }
}

/* ---------- Cards / layout ---------- */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.card + .card { margin-top: var(--space-4); }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  gap: var(--space-3);
  flex-wrap: wrap;
}

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

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-4);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}
.stat-icon svg { width: 19px; height: 19px; }
.stat-icon.tone-success { background: var(--color-success-soft); color: var(--color-success); }
.stat-icon.tone-warning { background: var(--color-warning-soft); color: var(--color-warning); }
.stat-icon.tone-danger { background: var(--color-danger-soft); color: var(--color-danger); }
.stat-icon.tone-violet { background: #f1ecff; color: var(--color-accent-2); }

.stat-body { min-width: 0; }
.stat-card .stat-value { font-size: 24px; font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; }
.stat-card .stat-label { color: var(--color-text-muted); font-size: 12.5px; margin-top: 3px; font-weight: 500; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 15px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 13px;
  transition: background 0.14s ease, box-shadow 0.14s ease, transform 0.05s ease;
}
.btn svg { width: 15px; height: 15px; }
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 130%);
  color: #fff;
  box-shadow: 0 6px 16px -4px rgba(91, 91, 240, 0.45);
}
.btn-primary:hover { background: linear-gradient(135deg, var(--color-accent-hover) 0%, var(--color-accent-2) 130%); box-shadow: 0 8px 20px -4px rgba(91, 91, 240, 0.55); }

.btn-secondary { background: var(--color-surface); border-color: var(--color-border-strong); color: var(--color-text); }
.btn-secondary:hover { background: var(--color-bg); border-color: var(--color-text-faint); }

.btn-danger { background: var(--color-danger-soft); color: var(--color-danger); }
.btn-danger:hover { background: #fbd9d9; }

.btn-ghost { background: none; color: var(--color-text-muted); padding: 7px; border-radius: var(--radius-sm); }
.btn-ghost:hover { background: var(--color-bg-alt); color: var(--color-text); }

.btn-sm { padding: 6px 11px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Forms ---------- */

.field { margin-bottom: var(--space-3); }
.field label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.field input, .field select, .field textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-family: inherit;
  background: var(--color-surface-2);
  color: var(--color-text);
  transition: border-color 0.14s ease, box-shadow 0.14s ease, background 0.14s ease;
}

.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
  box-shadow: var(--shadow-glow);
}

.field-row { display: flex; gap: var(--space-3); }
.field-row > .field { flex: 1; }

.checkbox-field { display: flex; align-items: center; gap: 8px; margin-bottom: var(--space-3); }
.checkbox-field input { width: auto; accent-color: var(--color-accent); }
.checkbox-field label { margin: 0; font-weight: 500; color: var(--color-text); }

/* ---------- Table ---------- */

table { width: 100%; border-collapse: collapse; }
thead th {
  text-align: left;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-faint);
  font-weight: 700;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
}
tbody td {
  padding: 12px var(--space-3);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.1s ease; }
tbody tr:hover { background: var(--color-bg-alt); }

.table-actions { display: flex; gap: 2px; justify-content: flex-end; }

/* ---------- Badges / progress ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
}
.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
}
.badge-success { background: var(--color-success-soft); color: var(--color-success); }
.badge-warning { background: var(--color-warning-soft); color: var(--color-warning); }
.badge-danger { background: var(--color-danger-soft); color: var(--color-danger); }
.badge-neutral { background: var(--color-bg-alt); color: var(--color-text-muted); }

.progress-track {
  width: 100%;
  height: 7px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
  border-radius: 999px;
  transition: width 0.2s ease;
}
.progress-fill.warning { background: var(--color-warning); }
.progress-fill.danger { background: var(--color-danger); }

/* ---------- Modal ---------- */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(14, 15, 30, 0.5);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  overflow-y: auto;
  z-index: 100;
  animation: fade-in 0.14s ease;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  padding: var(--space-5);
  animation: modal-in 0.16s ease;
}

@keyframes fade-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes modal-in { from { opacity: 0; transform: translateY(8px) scale(0.99); } to { opacity: 1; transform: translateY(0) scale(1); } }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* ---------- Toast ---------- */

.toast-container {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: 200;
}

.toast {
  background: var(--color-text);
  color: #fff;
  padding: 11px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  animation: toast-in 0.16s ease;
}
.toast.error { background: var(--color-danger); }
.toast.success { background: var(--color-success); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Login ---------- */

.login-screen {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  background: var(--color-surface);
}

.login-hero {
  background: var(--sidebar-bg);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-8);
  color: #fff;
  overflow: hidden;
}
.login-hero::before {
  content: '';
  position: absolute;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 91, 240, 0.35), transparent 70%);
  top: -160px;
  right: -160px;
}
.login-hero::after {
  content: '';
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent 70%);
  bottom: -140px;
  left: -100px;
}

.login-hero-brand { display: flex; align-items: center; gap: 12px; position: relative; z-index: 1; }
.login-hero-quote {
  position: relative;
  z-index: 1;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
  max-width: 420px;
}
.login-hero-quote span { color: #b3b6ff; }
.login-hero-foot { position: relative; z-index: 1; font-size: 12.5px; color: var(--sidebar-text); }

.login-form-side {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.login-card {
  width: 100%;
  max-width: 360px;
}

.login-card h1 { margin-bottom: 4px; }
.login-card p.subtitle { color: var(--color-text-muted); margin-bottom: var(--space-6); }

@media (max-width: 860px) {
  .login-screen { grid-template-columns: 1fr; }
  .login-hero { display: none; }
}

.form-error {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-danger-soft);
  color: var(--color-danger);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 12.5px;
  font-weight: 500;
  margin-bottom: var(--space-3);
}
.form-error svg { width: 15px; height: 15px; flex-shrink: 0; }

/* ---------- Misc ---------- */

.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }
.text-right { text-align: right; }
.empty-state {
  text-align: center;
  padding: var(--space-8) var(--space-4);
  color: var(--color-text-muted);
}
.empty-state svg { width: 32px; height: 32px; color: var(--color-text-faint); margin-bottom: var(--space-3); }

.spinner {
  width: 22px;
  height: 22px;
  border: 2.5px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: var(--space-6) auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

.tabs { display: flex; gap: var(--space-2); border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-4); }
.tab {
  padding: var(--space-2) var(--space-3);
  font-weight: 600;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.12s ease;
}
.tab.active { color: var(--color-accent); border-color: var(--color-accent); }

.year-pills { display: flex; gap: 6px; margin-bottom: var(--space-4); }
.year-pill {
  padding: 7px 15px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 12.5px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text-muted);
  transition: all 0.14s ease;
}
.year-pill:hover { border-color: var(--color-accent); color: var(--color-accent); }
.year-pill.active {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 130%);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 14px -4px rgba(91, 91, 240, 0.5);
}