@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

:root {
  --bg:         #0a0a0f;
  --bg2:        #111118;
  --bg3:        #1a1a24;
  --border:     #2a2a38;
  --accent:     #ffffff;
  --accent2:    #a0a8c0;
  --danger:     #ef4444;
  --warning:    #f59e0b;
  --success:    #22c55e;
  --text:       #f0f0f5;
  --text2:      #8888a0;
  --text3:      #444458;
  --card:       #111118;
  --navy:       #1a2040;
  --navy2:      #232850;
  --nav-width:  220px;
  --font-main:  'DM Sans', sans-serif;
  --font-mono:  'Space Mono', monospace;
}

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

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

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

/* ── Sidebar Nav ── */
.sidebar {
  width: var(--nav-width);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  padding: 0;
}

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

.sidebar-logo .brand {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.sidebar-logo .sub {
  font-size: 11px;
  color: var(--text3);
  margin-top: 2px;
  letter-spacing: 0.02em;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-section {
  padding: 8px 20px 4px;
  font-size: 10px;
  font-weight: 700;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 20px;
  color: var(--text2);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
  border-left: 3px solid transparent;
  cursor: pointer;
}

.nav-link:hover {
  color: var(--text);
  background: var(--bg3);
}

.nav-link.active {
  color: var(--text);
  border-left-color: var(--text);
  background: rgba(255,255,255,0.06);
}

.nav-link .icon {
  width: 16px;
  text-align: center;
  font-size: 14px;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.user-info {
  font-size: 11px;
  color: var(--text3);
  margin-bottom: 8px;
  word-break: break-all;
}

.btn-logout {
  width: 100%;
  padding: 7px 12px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text2);
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  font-family: var(--font-main);
  transition: all 0.15s;
}

.btn-logout:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* ── Main Content ── */
.main-content {
  margin-left: var(--nav-width);
  flex: 1;
  padding: 32px 32px;
  min-height: 100vh;
}

/* ── Page Header ── */
.page-header {
  margin-bottom: 28px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-size: 13px;
  color: var(--text2);
  margin-top: 4px;
}

/* ── Cards ── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

/* ── Stat Cards ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 26px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text);
  letter-spacing: -0.02em;
}

.stat-value.accent  { color: var(--text); }
.stat-value.blue    { color: var(--accent2); }
.stat-value.warning { color: var(--warning); }
.stat-value.success { color: var(--success); }

.stat-sub {
  font-size: 11px;
  color: var(--text3);
  margin-top: 4px;
}

/* ── Tables ── */
.table-wrap {
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  background: var(--bg3);
  padding: 10px 14px;
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

tbody tr {
  border-bottom: 1px solid var(--border);
  transition: background 0.1s;
}

tbody tr:last-child { border-bottom: none; }

tbody tr:hover { background: var(--bg3); }

tbody td {
  padding: 11px 14px;
  font-size: 13px;
  color: var(--text);
  vertical-align: middle;
}

.mono { font-family: var(--font-mono); font-size: 12px; }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

.badge-ft      { background: rgba(0,212,170,0.12); color: var(--accent); }
.badge-pt      { background: rgba(59,130,246,0.12); color: var(--accent2); }
.badge-oc      { background: rgba(148,163,184,0.1); color: var(--text2); }
.badge-paid    { background: rgba(34,197,94,0.12); color: var(--success); }
.badge-unpaid  { background: rgba(239,68,68,0.12); color: var(--danger); }
.badge-partial { background: rgba(245,158,11,0.12); color: var(--warning); }

/* ── Forms ── */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text2);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input, .form-select {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 13px;
  font-family: var(--font-main);
  transition: border-color 0.15s;
  outline: none;
}

.form-input:focus, .form-select:focus {
  border-color: var(--accent);
}

.form-select option { background: var(--bg3); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-main);
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--navy2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-primary:hover { background: #2d3460; }

.btn-secondary {
  background: var(--bg3);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

.btn-danger {
  background: rgba(239,68,68,0.12);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.2);
}
.btn-danger:hover { background: rgba(239,68,68,0.2); }

.btn-sm { padding: 6px 12px; font-size: 12px; }

/* ── Grid layouts ── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

/* ── Utils ── */
.text-accent  { color: var(--accent); }
.text-muted   { color: var(--text2); }
.text-danger  { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-mono    { font-family: var(--font-mono); }
.mb-4  { margin-bottom: 4px; }
.mb-8  { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }
.flex  { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8  { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }

/* ── Divider ── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 20px 0;
}

/* ── Toast ── */
.toast-container {
  position: fixed;
  bottom: 24px; right: 24px;
  display: flex; flex-direction: column; gap: 8px;
  z-index: 9999;
}

.toast {
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  animation: slideIn 0.2s ease;
  max-width: 320px;
}

.toast-success { background: var(--success); color: #fff; }
.toast-error   { background: var(--danger); color: #fff; }
.toast-info    { background: var(--accent2); color: #fff; }

@keyframes slideIn {
  from { transform: translateX(40px); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

/* ── Loading ── */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: var(--text3);
  font-size: 13px;
  gap: 10px;
}

.spinner {
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Empty state ── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text3);
}

.empty-state .icon { font-size: 32px; margin-bottom: 12px; }
.empty-state p { font-size: 13px; }

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  width: 100%;
  max-width: 480px;
  animation: modalIn 0.2s ease;
}

@keyframes modalIn {
  from { transform: scale(0.95); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 24px;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .main-content { margin-left: 0; padding: 16px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
}