/* ═══════════════════════════════════════════════════════════════════════════
   ПроСметчик — Design System
   Mobile-first · Light/Dark · Accessible
═══════════════════════════════════════════════════════════════════════════ */

:root {
  /* Colors — light theme (default) */
  --primary: #1a6fc4;
  --primary-dark: #145da0;
  --primary-soft: #eef5ff;
  --accent: #f0a500;
  --accent-dark: #c78800;

  --bg: #f4f6f9;
  --bg-card: #ffffff;
  --bg-soft: #f7fafc;
  --bg-hover: #edf2f7;

  --text: #1a202c;
  --text-muted: #718096;
  --text-soft: #a0aec0;

  --border: #e2e8f0;
  --border-soft: #edf2f7;

  --success: #38a169;
  --warning: #ed8936;
  --danger:  #e53e3e;
  --info:    #3182ce;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 1px 3px rgba(0,0,0,.06);
  --shadow-md: 0 2px 4px rgba(0,0,0,.06), 0 4px 12px rgba(0,0,0,.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.1);

  --sidebar-w: 240px;
  --sidebar-w-collapsed: 64px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;

  --transition: .2s cubic-bezier(.4,0,.2,1);
}

/* Dark theme */
:root[data-theme="dark"] {
  --primary: #4299e1;
  --primary-dark: #63b3ed;
  --primary-soft: #1a365d;
  --accent: #f6b93b;
  --accent-dark: #f0a500;

  --bg: #0f141c;
  --bg-card: #1a202c;
  --bg-soft: #232b3d;
  --bg-hover: #2d3748;

  --text: #e2e8f0;
  --text-muted: #a0aec0;
  --text-soft: #718096;

  --border: #2d3748;
  --border-soft: #232b3d;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.2), 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 2px 4px rgba(0,0,0,.25), 0 4px 12px rgba(0,0,0,.35);
  --shadow-lg: 0 10px 30px rgba(0,0,0,.45);
}

/* ── Base ──────────────────────────────────────────────────────────────── */

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition), color var(--transition);
}

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

::selection { background: var(--primary); color: #fff; }

/* ── Auth page ─────────────────────────────────────────────────────────── */

.auth-card {
  max-width: 440px;
  margin: 60px auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.auth-logo { font-size: 2rem; font-weight: 800; color: var(--primary); }
.auth-logo span { color: var(--accent); }

/* ── App shell ─────────────────────────────────────────────────────────── */

.app-wrapper { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: #111722;
  color: #c9d1d9;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  transition: transform var(--transition), width var(--transition);
  box-shadow: var(--shadow-md);
}
.sidebar-brand {
  padding: 20px 18px 16px;
  font-weight: 800;
  font-size: 1.15rem;
  color: #fff;
  border-bottom: 1px solid #243041;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-brand::before {
  content: "🧮";
  font-size: 1.3rem;
}
.sidebar-brand span { color: var(--accent); }

.sidebar-nav { flex: 1; padding: 12px 0; overflow-y: auto; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 20px;
  color: #a0aec0;
  text-decoration: none;
  transition: all var(--transition);
  font-size: .94rem;
  border-left: 3px solid transparent;
  position: relative;
}
.sidebar-nav a:hover {
  background: rgba(255,255,255,.05);
  color: #e2e8f0;
}
.sidebar-nav a.active {
  background: linear-gradient(90deg, rgba(26,111,196,.2), transparent);
  color: #fff;
  border-left-color: var(--primary);
}
.sidebar-nav a .icon { font-size: 1.15rem; width: 22px; display: inline-flex; justify-content: center; }

.sidebar-footer {
  border-top: 1px solid #243041;
  padding: 12px 18px;
}
.sidebar-user {
  font-size: .82rem;
  color: #718096;
  margin-bottom: 10px;
}
.sidebar-user strong { display: block; color: #e2e8f0; margin-bottom: 4px; word-break: break-all; }

.theme-toggle {
  background: #1e2937;
  color: #cbd5e0;
  border: 1px solid #2d3a4e;
  border-radius: var(--radius);
  padding: 7px 12px;
  width: 100%;
  cursor: pointer;
  font-size: .85rem;
  display: flex; align-items: center; justify-content: center;
  gap: 8px;
  transition: all var(--transition);
}
.theme-toggle:hover { background: #263249; color: #fff; }

.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  padding: 28px 32px;
  max-width: calc(100vw - var(--sidebar-w));
  padding-bottom: 80px;
}

.page-title {
  font-size: 1.45rem;
  font-weight: 700;
  margin-bottom: 22px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Mobile sidebar backdrop */
.sidebar-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 90;
  backdrop-filter: blur(2px);
}
.sidebar-backdrop.show { display: block; }

/* Hamburger button — mobile only */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 14px; left: 14px;
  z-index: 110;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  width: 42px; height: 42px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  font-size: 1.3rem;
  cursor: pointer;
  align-items: center; justify-content: center;
}

/* ── Cards ─────────────────────────────────────────────────────────────── */

.card, .stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.card { padding: 0; }
.card.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.card.border-0 { border: 1px solid var(--border) !important; }

.stat-card {
  padding: 20px;
}
.stat-card .label { font-size: .78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 4px; }
.stat-card .value { font-size: 1.8rem; font-weight: 700; color: var(--text); }

/* ── Drop zone ─────────────────────────────────────────────────────────── */

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 50px 20px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--bg-card);
}
.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-1px);
}
.drop-zone .icon { font-size: 3rem; opacity: .6; }
.drop-zone p { margin: 10px 0 0; color: var(--text-muted); }

/* ── Buttons ───────────────────────────────────────────────────────────── */

.btn-primary-custom {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 11px 28px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 2px 8px rgba(26,111,196,.2);
}
.btn-primary-custom:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 14px rgba(26,111,196,.3);
  transform: translateY(-1px);
}
.btn-primary-custom:active { transform: translateY(0); }
.btn-primary-custom:disabled {
  opacity: .6; cursor: not-allowed; transform: none;
}

/* ── Work type tabs ────────────────────────────────────────────────────── */

.work-tabs {
  overflow-x: auto;
  white-space: nowrap;
  padding-bottom: 2px;
  margin: -4px -4px 16px;
  padding: 4px;
  -webkit-overflow-scrolling: touch;
}
.work-tabs::-webkit-scrollbar { height: 4px; }
.work-tabs::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.work-tabs .nav-tabs {
  border-bottom: 2px solid var(--border);
  flex-wrap: nowrap;
}
.work-tabs .nav-link {
  white-space: nowrap;
  color: var(--text-muted);
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: 10px 14px;
  margin-bottom: -2px;
  font-size: .9rem;
  font-weight: 500;
  transition: all var(--transition);
}
.work-tabs .nav-link:hover { color: var(--primary); border-color: var(--border); background: transparent; }
.work-tabs .nav-link.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  background: transparent;
  font-weight: 600;
}

/* ── Forms ─────────────────────────────────────────────────────────────── */

.form-label {
  font-weight: 500;
  color: var(--text);
  font-size: .9rem;
  margin-bottom: 5px;
  display: flex; align-items: center; gap: 6px;
}
.form-label .req { color: var(--danger); }
.form-label .hint {
  display: inline-flex;
  width: 16px; height: 16px;
  align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-muted);
  font-size: .72rem;
  cursor: help;
  font-weight: 600;
}

.form-control, .form-select {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 12px;
  transition: border-color var(--transition), box-shadow var(--transition);
  font-size: .95rem;
}
.form-control:focus, .form-select:focus {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,111,196,.15);
  outline: none;
}
.form-control::placeholder { color: var(--text-soft); }

.form-hint {
  font-size: .78rem;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.4;
}

/* Pill-selector — для типа свай и т.п. */
.pill-selector {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 4px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.pill-selector label {
  flex: 1 1 auto;
  min-width: 80px;
  padding: 8px 12px;
  text-align: center;
  cursor: pointer;
  border-radius: calc(var(--radius) - 2px);
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all var(--transition);
  user-select: none;
  border: none;
}
.pill-selector input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.pill-selector label:hover { color: var(--text); background: var(--bg-hover); }
.pill-selector input[type="radio"]:checked + label,
.pill-selector label.selected {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 6px rgba(26,111,196,.25);
}

/* Диаметры — mini-chips */
.chip-group { display: flex; gap: 6px; flex-wrap: wrap; }
.chip-group .chip {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  font-size: .85rem;
  transition: all var(--transition);
}
.chip-group .chip:hover { border-color: var(--primary); color: var(--primary); }
.chip-group .chip.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.chip-group .chip.disabled {
  opacity: .4;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Result table ──────────────────────────────────────────────────────── */

.result-card {
  background: var(--bg-card) !important;
  border: 1px solid var(--border) !important;
  color: var(--text);
}
.result-table {
  background: transparent;
  color: var(--text);
}
.result-table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text);
}
.result-table td { color: var(--text); border-color: var(--border-soft); }
.result-table .table-secondary { background: var(--bg-soft) !important; color: var(--text-muted); }
.total-row td { font-weight: 700; background: var(--primary-soft); }
.total-box {
  background: var(--primary-soft) !important;
  border: 1px solid var(--border);
  border-radius: var(--radius) !important;
}
.total-box .text-primary { color: var(--primary) !important; }
.total-box .text-muted { color: var(--text-muted) !important; }

/* ── Alerts ───────────────────────────────────────────────────────────── */

.alert {
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.alert-light {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}
.alert-warning { background: rgba(237,137,54,.12); color: var(--warning); border-color: rgba(237,137,54,.3); }
.alert-danger { background: rgba(229,62,62,.12); color: var(--danger); border-color: rgba(229,62,62,.3); }
.alert-success { background: rgba(56,161,105,.12); color: var(--success); border-color: rgba(56,161,105,.3); }
.alert-info { background: rgba(49,130,206,.12); color: var(--info); border-color: rgba(49,130,206,.3); }

/* Info-banner для форм */
.form-info-banner {
  background: var(--primary-soft);
  border: 1px solid rgba(26,111,196,.2);
  border-radius: var(--radius);
  padding: 10px 14px;
  margin-bottom: 14px;
  font-size: .85rem;
  color: var(--primary-dark);
  display: flex; align-items: flex-start; gap: 8px;
}
.form-info-banner::before { content: "💡"; }

/* ── Badges ───────────────────────────────────────────────────────────── */

.badge-trial { background: #ed8936; color: #fff; }
.badge-pro   { background: #38a169; color: #fff; }
.badge-free  { background: #718096; color: #fff; }
.text-muted-sm { font-size: .82rem; color: var(--text-muted); }
.text-muted, .table .text-muted { color: var(--text-muted) !important; }

/* ── Modal / Spinner ───────────────────────────────────────────────────── */

.spinner-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(2px);
}

/* ── Skeleton shimmer (для loading state) ─────────────────────────────── */

@keyframes shimmer {
  0% { background-position: -200px 0; }
  100% { background-position: calc(200px + 100%) 0; }
}
.skeleton {
  display: inline-block;
  height: 1em;
  min-width: 40px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--border-soft) 0px, var(--bg-hover) 40px, var(--border-soft) 80px);
  background-size: 200px 100%;
  animation: shimmer 1.2s infinite linear;
}

/* ── Dark theme: специальные override ────────────────────────────────── */

:root[data-theme="dark"] .card,
:root[data-theme="dark"] .stat-card { background: var(--bg-card); border-color: var(--border); }
:root[data-theme="dark"] .text-danger { color: #fc8181 !important; }
:root[data-theme="dark"] .text-primary { color: var(--primary) !important; }
:root[data-theme="dark"] .text-muted { color: var(--text-muted) !important; }

:root[data-theme="dark"] .table { --bs-table-bg: transparent; color: var(--text); border-color: var(--border); }
:root[data-theme="dark"] .table th, :root[data-theme="dark"] .table td { border-color: var(--border-soft); }
:root[data-theme="dark"] .bg-white { background: var(--bg-card) !important; }

:root[data-theme="dark"] .badge.bg-info { background: #2b6cb0 !important; color: #fff !important; }
:root[data-theme="dark"] .badge.bg-secondary { background: #4a5568 !important; }

/* ── Responsive breakpoints ──────────────────────────────────────────── */

/* Tablet */
@media (max-width: 1024px) {
  .main-content { padding: 22px 20px; }
}

/* Mobile ≤ 768px */
@media (max-width: 768px) {
  .sidebar-toggle { display: inline-flex; }

  .sidebar {
    transform: translateX(-100%);
    width: 260px;
    box-shadow: none;
  }
  .sidebar.show {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }
  .sidebar-brand { padding-left: 60px; } /* место под крестик или гамбургер */

  .main-content {
    margin-left: 0 !important;
    max-width: 100vw;
    padding: 64px 14px 80px;
  }

  .page-title {
    font-size: 1.2rem;
    margin-bottom: 14px;
  }

  .card, .stat-card { padding: 14px !important; border-radius: var(--radius); }
  .card.p-4 { padding: 16px !important; }

  .work-tabs { margin: -4px -14px 14px; padding: 4px 14px; }

  /* Форма — единый столбец */
  .row.g-3 > [class*="col-md-"] { margin-bottom: 10px; }

  .btn-primary-custom { width: 100%; padding: 12px; }

  .result-card .d-flex { flex-direction: column; align-items: flex-start; gap: 10px; }
  .total-box .row { flex-direction: column; gap: 12px; }
  .total-box .col-auto { width: 100%; }
  .total-box .btn { width: 100%; }

  /* Auth card — компактнее */
  .auth-card { margin: 20px 14px; max-width: none; }
}

/* Extra small ≤ 420px */
@media (max-width: 420px) {
  .main-content { padding: 64px 10px 70px; }
  .sidebar { width: 85vw; }
  .page-title { font-size: 1.1rem; }
  .pill-selector label { font-size: .82rem; padding: 7px 8px; }
}

/* Печать — чистая вёрстка */
@media print {
  .sidebar, .sidebar-toggle, .work-tabs, .calc-submit-btn, #calc-quota-bar { display: none !important; }
  .main-content { margin: 0 !important; padding: 0 !important; }
}