/* ============================================================
   Finance Tool — Stylesheet
   Palette: ink navy sidebar, paper content, teal accent
   ============================================================ */

:root {
  --ink: #17313A;
  --ink-soft: #204049;
  --paper: #F5F7F6;
  --card: #FFFFFF;
  --line: #DEE7E4;
  --text: #1E2E2D;
  --text-mute: #6B7B78;
  --teal: #39AFA4;
  --teal-dark: #2C8880;
  --amber: #C98A3E;
  --rust: #B5533C;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 4px 0;
  color: var(--ink);
}
h1 { font-size: 22px; }
h2 { font-size: 17px; }
h3 { font-size: 14px; color: var(--text-mute); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }

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

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

.sidebar {
  width: 220px;
  background: var(--ink);
  color: #C9D3DB;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; bottom: 0; left: 0;
  z-index: 40;
  transition: transform 0.2s ease;
}

.sidebar .brand {
  padding: 20px 20px 16px;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 16px;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar .brand img.logo { height: 28px; display: block; }
.sidebar .brand small { display: block; font-weight: 400; font-size: 11px; color: #8FA0AC; margin-top: 6px; }

.sidebar nav { padding: 10px 0; flex: 1; overflow-y: auto; }
.sidebar .nav-group { margin-bottom: 6px; }
.sidebar .nav-label { font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em; color: #6E828F; padding: 14px 20px 6px; }
.sidebar a.nav-link {
  display: block;
  padding: 9px 20px;
  color: #C9D3DB;
  font-size: 14px;
  border-left: 3px solid transparent;
}
.sidebar a.nav-link:hover { background: rgba(255,255,255,0.05); text-decoration: none; }
.sidebar a.nav-link.active { background: rgba(63,125,110,0.25); border-left-color: var(--teal); color: #fff; font-weight: 600; }

.sidebar .logout { padding: 16px 20px; border-top: 1px solid rgba(255,255,255,0.08); }
.sidebar .logout a { color: #C9D3DB; font-size: 13px; }

.main {
  margin-left: 220px;
  flex: 1;
  padding: 24px 28px 80px;
  width: 100%;
}

.topbar {
  display: none;
  align-items: center;
  justify-content: space-between;
  background: var(--ink);
  color: #fff;
  padding: 14px 16px;
  position: sticky;
  top: 0;
  z-index: 30;
}
.topbar .hamburger {
  background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; padding: 4px 8px;
}
.topbar .brand { font-family: "Space Grotesk", sans-serif; font-weight: 700; font-size: 15px; }
.topbar .brand img.logo { height: 22px; display: block; }

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0; background: rgba(0,0,0,0.4); z-index: 39;
}

/* ---------- Page header ---------- */
.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}
.page-head p { color: var(--text-mute); margin: 2px 0 0; font-size: 13.5px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--teal);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  line-height: 1.2;
}
.btn:hover { background: var(--teal-dark); text-decoration: none; }
.btn.secondary { background: var(--card); color: var(--text); border: 1px solid var(--line); }
.btn.secondary:hover { background: #F0EEE7; }
.btn.danger { background: #fff; color: var(--rust); border: 1px solid #e3c3ba; }
.btn.danger:hover { background: #fdf2f0; }
.btn.small { padding: 5px 10px; font-size: 12.5px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ---------- Cards / stats ---------- */
.grid { display: grid; gap: 16px; }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.stat-card .stat-label { font-size: 12.5px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 6px; }
.stat-card .stat-value { font-family: "Space Grotesk", sans-serif; font-size: 24px; font-weight: 700; color: var(--ink); }
.stat-card .stat-value.rust { color: var(--rust); }
.stat-card .stat-value.teal { color: var(--teal-dark); }
.stat-card .stat-sub { font-size: 12px; color: var(--text-mute); margin-top: 4px; }

/* ---------- Forms ---------- */
.form-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; max-width: 640px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 5px; }
.field .hint { font-size: 12px; color: var(--text-mute); margin-top: 4px; }
.field-row { display: flex; gap: 14px; }
.field-row .field { flex: 1; }

input[type="text"], input[type="number"], input[type="date"], input[type="password"],
select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 14.5px;
  background: #fff;
  color: var(--text);
  font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--teal);
  outline-offset: 0;
  border-color: var(--teal);
}
textarea { resize: vertical; min-height: 60px; }

.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }

.inline-add { display: flex; gap: 8px; align-items: flex-end; }
.inline-add select { flex: 1; }

/* ---------- Tables ---------- */
.table-wrap { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
th {
  text-align: left;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-mute);
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
td { padding: 12px 16px; border-bottom: 1px solid #EFEDE6; vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #FBFAF7; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.muted { color: var(--text-mute); }
.empty-row td { text-align: center; color: var(--text-mute); padding: 32px 16px; }

/* ---------- Badges ---------- */
.badge { display: inline-block; padding: 3px 9px; border-radius: 20px; font-size: 11.5px; font-weight: 600; }
.badge.paid { background: #E4F0EA; color: var(--teal-dark); }
.badge.unpaid { background: #FBE9E5; color: var(--rust); }
.badge.partial { background: #FBF0DD; color: #9C6A22; }
.badge.overdue { background: #F8D9D1; color: #93301E; }
.badge.void { background: #EDEDED; color: #888; }

/* ---------- Alerts ---------- */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 13.5px; margin-bottom: 16px; }
.alert.success { background: #E4F0EA; color: var(--teal-dark); }
.alert.error { background: #FBE9E5; color: var(--rust); }
.alert.info { background: #EAF0F5; color: #2E5B78; }

/* ---------- Login page ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  padding: 20px;
}
.login-card {
  background: var(--card);
  border-radius: 14px;
  padding: 36px 32px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-card img.logo { display: block; height: 40px; margin: 0 auto 18px; }
.login-card h1 { text-align: center; margin-bottom: 4px; }
.login-card p.sub { text-align: center; color: var(--text-mute); font-size: 13px; margin-bottom: 24px; }
.login-card .btn { width: 100%; justify-content: center; margin-top: 6px; }

/* ---------- Utility ---------- */
.flex { display: flex; align-items: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }
.mt-24 { margin-top: 24px; }
.text-right { text-align: right; }
.section-title { margin: 28px 0 12px; }
.section-title:first-child { margin-top: 0; }
.filter-bar { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; margin-bottom: 16px; }
.filter-bar .field { margin-bottom: 0; min-width: 150px; }

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }
  .main { margin-left: 0; padding: 18px 16px 90px; }
  .topbar { display: flex; }
  .grid.cols-4, .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr 1fr; }
  .field-row { flex-direction: column; gap: 0; }
  table { min-width: 480px; }
}
@media (max-width: 480px) {
  .grid.cols-4, .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
}