/* ===== Variables – design pro (inspiration Linear / Stripe) ===== */
:root {
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --border-focus: #0f766e;
  --text: #0f172a;
  --text-muted: #64748b;
  --primary: #0f766e;
  --primary-hover: #0d5d57;
  --primary-light: #ccfbf1;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,.05);
  --shadow-md: 0 4px 14px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 40px rgba(0,0,0,.08);
  --max-w: 1200px;
  --space: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
#app { min-height: 100vh; }

/* ===== Layout ===== */
.layout-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space) var(--space-xl);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.layout-main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--space-xl);
}

/* ===== Brand / Logo ===== */
.brand {
  display: flex;
  align-items: center;
  gap: var(--space);
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}
.brand img {
  height: 40px;
  width: auto;
  object-fit: contain;
}
.brand img[data-error] { display: none; }
.brand-text {
  display: none;
  color: var(--primary);
  font-weight: 800;
  letter-spacing: -0.03em;
}
.brand:has(img[data-error]) .brand-text { display: inline; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, border-color .15s, box-shadow .15s;
  font-family: inherit;
}
.btn:hover { box-shadow: var(--shadow); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}
.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--bg);
  border-color: var(--text-muted);
}
.btn-danger {
  background: var(--bg-card);
  color: var(--danger);
  border-color: var(--danger);
}
.btn-danger:hover {
  background: #fef2f2;
  border-color: var(--danger-hover);
}
.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
  font-weight: 500;
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: var(--space-xl);
  animation: fadeIn .2s ease;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow: auto;
  animation: slideUp .25s ease;
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.modal-header {
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h2 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
}
.modal-close {
  background: none;
  border: none;
  padding: 6px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.4rem;
  line-height: 1;
  border-radius: var(--radius-sm);
}
.modal-close:hover { color: var(--text); background: var(--bg); }
.modal-body { padding: var(--space-xl); }
.modal-footer {
  padding: var(--space) var(--space-xl) var(--space-xl);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--space);
  justify-content: flex-end;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: var(--space-lg);
}
.form-group:last-child { margin-bottom: 0; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 14px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.form-group .hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space);
}

/* ===== Login ===== */
.screen-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  background: linear-gradient(180deg, var(--bg) 0%, #e2e8f0 100%);
}
.screen-login .card {
  width: 100%;
  max-width: 400px;
  padding: var(--space-xl);
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}
.login-logo {
  text-align: center;
  margin-bottom: 8px;
}
.login-logo img {
  max-width: 180px;
  height: auto;
  display: block;
  margin: 0 auto;
}
.login-logo-fallback {
  display: none;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
}
.screen-login .subtitle {
  margin: 0 0 var(--space-xl);
  font-size: 0.95rem;
  color: var(--text-muted);
  text-align: center;
}
.screen-login label {
  display: block;
  margin-top: var(--space);
  font-size: 13px;
  font-weight: 600;
}
.screen-login input {
  margin-top: 4px;
}
.screen-login .btn { width: 100%; margin-top: var(--space-lg); }
.screen-login .error {
  margin-top: var(--space);
  font-size: 13px;
  color: var(--danger);
}

/* ===== Dashboard ===== */
.screen-dashboard .toolbar {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-xl);
}
.screen-dashboard .grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
}
.screen-dashboard .card {
  padding: var(--space-xl);
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: box-shadow .2s, border-color .2s;
}
.screen-dashboard .card:hover {
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}
.screen-dashboard .card h3 {
  margin: 0 0 6px;
  font-size: 1.15rem;
  font-weight: 700;
}
.screen-dashboard .card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.screen-dashboard .card-actions {
  margin-top: var(--space-lg);
  padding-top: var(--space);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--space);
}
.screen-dashboard .empty {
  text-align: center;
  padding: var(--space-xl) * 2;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Projet – Tabs ===== */
.screen-projet .tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  background: var(--bg-card);
  padding: 0 var(--space-xl);
  overflow-x: auto;
}
.screen-projet .tabs button {
  padding: 16px 20px;
  border: none;
  background: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  font-family: inherit;
  transition: color .15s;
}
.screen-projet .tabs button:hover { color: var(--primary); }
.screen-projet .tabs button.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.screen-projet .tab-panel {
  display: none;
  padding: var(--space-xl);
  background: var(--bg);
}
.screen-projet .tab-panel.active { display: block; }

/* ===== Panels ===== */
.panel {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
}
.panel h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
  font-weight: 700;
}
.panel .hint {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space);
}
.panel h4 { margin: 0 0 var(--space); font-size: 1rem; font-weight: 600; }

/* ===== Lists ===== */
.list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  margin: 6px 0;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: border-color .15s, background .15s;
}
.list li:hover { border-color: var(--border); }
.list li .actions { display: flex; gap: 8px; }
.list li[data-id] { cursor: pointer; }
.list li.selected { border-color: var(--primary); background: var(--primary-light); }
.equip-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  background: var(--border);
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  background: var(--text);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 9999;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .2s, transform .2s;
  box-shadow: var(--shadow-lg);
}
.toast.show {
  opacity: 1;
  transform: translateY(0);
}
.toast.error { background: var(--danger); }

/* ===== Devis récap ===== */
.devis-result { margin-top: 1.5rem; }
.devis-recap h4 { margin: 0 0 0.75rem; font-size: 1.05rem; }
.devis-table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0 1rem;
  font-size: 0.95rem;
}
.devis-table td { padding: 6px 0; border-bottom: 1px solid var(--border); }
.devis-table .right { text-align: right; }
.devis-table tr.total td { border-bottom: none; padding-top: 10px; font-size: 1rem; }
.devis-recap .btn { margin-top: 0.5rem; }