/* ===================================================================
   ระบบบัญชีตู้น้ำมัน กาดป่าตึง — mobile-first, vanilla CSS
   =================================================================== */

:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-warn: #d97706;
  --color-warn-bg: #fffbeb;
  --color-bg: #f5f7fa;
  --color-card: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Sarabun", "Noto Sans Thai", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

a { color: var(--color-primary); text-decoration: none; }

/* ---------- Top bar ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 16px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-title { font-weight: 700; font-size: 1.1rem; }
.topbar-user { font-size: 0.85rem; color: var(--color-text-muted); }
.topbar-user a { color: var(--color-danger); }
.logout-form { display: inline; }
.link-btn {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  font-size: 0.85rem;
  color: var(--color-danger);
  cursor: pointer;
  text-decoration: none;
}
.link-btn:hover { text-decoration: underline; }


/* ---------- Container ---------- */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 12px 12px 88px; /* เผื่อพื้นที่ bottom-nav */
}

/* ---------- Card ---------- */
.card {
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 12px;
}
.card h2 {
  margin-top: 0;
  font-size: 1.05rem;
}
.card-alert {
  background: var(--color-warn-bg);
  border: 1px solid #fde68a;
}
.card-alert strong { color: var(--color-warn); }

/* ---------- Grid ---------- */
.grid {
  display: grid;
  gap: 10px;
  margin-bottom: 12px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 480px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .stat { padding: 10px 8px; }
}

/* ---------- Stat card ---------- */
.stat { text-align: center; margin-bottom: 0; }
.stat-label { font-size: 0.75rem; color: var(--color-text-muted); margin-bottom: 4px; }
.stat-value { font-size: 1.4rem; font-weight: 700; }
.stat-unit { font-size: 0.7rem; color: var(--color-text-muted); }

/* ---------- Progress bar (สต็อกน้ำมัน) ---------- */
.progress {
  height: 8px;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
  margin-top: 8px;
}
.progress-bar { height: 100%; background: var(--color-primary); }
.progress-bar.progress-low { background: var(--color-danger); }

/* ---------- Forms ---------- */
label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 12px;
}
input, select, button, textarea {
  font-family: inherit;
  font-size: 1rem;
}
input[type="text"], input[type="number"], input[type="date"],
input[type="datetime-local"], input[type="month"], input[type="password"],
select {
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
}
input:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.inline-form { display: flex; align-items: center; }
.inline-form label { margin-bottom: 0; width: 100%; }

.hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: -4px 0 12px;
}

details summary { cursor: pointer; font-weight: 600; padding: 4px 0; }
details form { margin-top: 12px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 18px;
  border: none;
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}
.btn-block { display: block; width: 100%; }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-warn { background: var(--color-warn); color: #fff; }
.btn-secondary { background: #e2e8f0; color: var(--color-text); }

.quick-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 12px;
}

/* ---------- Alerts / flash ---------- */
.alert {
  margin: 8px 12px 0;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.9rem;
}
.alert-success { background: #dcfce7; color: #166534; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-warn { background: #fef3c7; color: #92400e; }

/* ---------- Tables ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
th, td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--color-border); white-space: nowrap; }
thead th { color: var(--color-text-muted); font-weight: 600; }
.text-muted { color: var(--color-text-muted); text-align: center; }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }

.report-table th { width: 55%; color: var(--color-text); font-weight: 600; }
.report-table .row-highlight th,
.report-table .row-highlight td { font-weight: 700; font-size: 1.05rem; border-top: 2px solid var(--color-border); }

.badge {
  display: inline-block;
  background: var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 600;
}

/* ---------- Bottom navigation ---------- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 -1px 4px rgba(0, 0, 0, 0.06);
  z-index: 10;
}
.bottom-nav a {
  flex: 1;
  text-align: center;
  padding: 8px 2px 10px;
  font-size: 0.68rem;
  color: var(--color-text-muted);
}
.bottom-nav a .ic { display: block; font-size: 1.2rem; margin-bottom: 2px; }
.bottom-nav a.active { color: var(--color-primary); font-weight: 700; }

/* ---------- Login page ---------- */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 16px;
}
.login-box {
  width: 100%;
  max-width: 360px;
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px 24px;
}
.login-box h1 { text-align: center; font-size: 1.3rem; margin-bottom: 20px; }

/* ---------- Desktop ---------- */
@media (min-width: 640px) {
  .container { padding-bottom: 24px; }
  .bottom-nav { position: static; box-shadow: none; border-top: none; margin-top: 16px; }
}