/* ────────────────────────────────────────────────────────────
   RoomTour Builder – Admin CSS
   Design philosophy: clean, neutral, business-grade.
   No gradients, no shadows theatrics, no animations beyond
   what aids usability.
──────────────────────────────────────────────────────────── */

/* ── Reset / Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg:        #f4f5f7;
  --color-surface:   #ffffff;
  --color-border:    #d1d5db;
  --color-border-lt: #e5e7eb;
  --color-text:      #1f2937;
  --color-text-muted:#6b7280;
  --color-primary:   #2563eb;
  --color-primary-h: #1d4ed8;
  --color-danger:    #dc2626;
  --color-danger-h:  #b91c1c;
  --color-success:   #16a34a;
  --color-success-h: #15803d;
  --color-green-bg:  #dcfce7;
  --color-green-txt: #166534;
  --color-gray-bg:   #f3f4f6;
  --color-gray-txt:  #6b7280;
  --radius:          4px;
  --font:            -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --sidebar-w:       220px;
  --topbar-h:        52px;
}

html { font-size: 15px; }

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
}

/* ── Login Page ── */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--color-bg);
}

.login-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 380px;
}

.login-box h1 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: .02em;
  margin-bottom: .25rem;
}

.login-box h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

/* ── Top Bar ── */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 1.25rem;
  gap: 1.5rem;
  z-index: 100;
}

.topbar-brand a {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: .02em;
}

.topbar-nav {
  display: flex;
  gap: 1rem;
}

.topbar-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-size: .9rem;
  padding: .25rem .5rem;
  border-radius: var(--radius);
}

.topbar-nav a:hover { background: var(--color-bg); }

.topbar-user {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: .75rem;
  font-size: .875rem;
  color: var(--color-text-muted);
}

/* ── Layout ── */
.admin-layout .admin-main {
  margin-top: var(--topbar-h);
  padding: 2rem;
  max-width: 1100px;
}

/* ── Page Header ── */
.page-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  flex: 1;
}

.back-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: .875rem;
}

.back-link:hover { color: var(--color-text); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .45rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  font-size: .875rem;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
  transition: background .1s, border-color .1s;
}

.btn:hover { background: var(--color-bg); }

.btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--color-primary-h); border-color: var(--color-primary-h); }

.btn-danger {
  background: var(--color-danger);
  border-color: var(--color-danger);
  color: #fff;
}
.btn-danger:hover { background: var(--color-danger-h); border-color: var(--color-danger-h); }

.btn-success {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}
.btn-success:hover { background: var(--color-success-h); border-color: var(--color-success-h); }

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--color-text-muted);
}
.btn-ghost:hover { background: var(--color-bg); color: var(--color-text); }

.btn-sm { padding: .3rem .7rem; font-size: .8rem; }
.btn-full { width: 100%; }

.btn:disabled { opacity: .5; pointer-events: none; }

/* ── Forms ── */
.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-size: .85rem;
  font-weight: 500;
  margin-bottom: .35rem;
  color: var(--color-text);
}

.field input[type="text"],
.field input[type="email"],
.field input[type="password"],
.field input[type="url"],
.field input[type="number"],
.field select,
.field textarea {
  width: 100%;
  padding: .45rem .65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: .875rem;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color .1s;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.field-error input,
.field-error select,
.field-error textarea {
  border-color: var(--color-danger);
}

.field-msg {
  display: block;
  font-size: .8rem;
  color: var(--color-danger);
  margin-top: .25rem;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
}

@media (max-width: 560px) { .field-row { grid-template-columns: 1fr; } }

.form-actions {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border-lt);
}

.form-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 640px;
}

.form-container.two-col form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-container.two-col .span-2 { grid-column: 1 / -1; }

@media (max-width: 720px) {
  .form-container.two-col form { grid-template-columns: 1fr; }
  .form-container.two-col .span-2 { grid-column: 1; }
}

fieldset {
  border: 1px solid var(--color-border-lt);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

fieldset legend {
  font-size: .8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 0 .4rem;
}

/* ── Alerts ── */
.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: .875rem;
  border: 1px solid transparent;
}

.alert-success { background: #dcfce7; border-color: #86efac; color: #166534; }
.alert-error   { background: #fee2e2; border-color: #fca5a5; color: #991b1b; }

/* ── Badge ── */
.badge {
  display: inline-block;
  padding: .15rem .5rem;
  border-radius: 9999px;
  font-size: .75rem;
  font-weight: 600;
}
.badge-green { background: var(--color-green-bg); color: var(--color-green-txt); }
.badge-gray  { background: var(--color-gray-bg);  color: var(--color-gray-txt); }

/* ── Data Table ── */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: .875rem;
  overflow: hidden;
}

.data-table thead th {
  text-align: left;
  padding: .65rem .9rem;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  font-weight: 600;
  font-size: .8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
}

.data-table tbody td {
  padding: .65rem .9rem;
  border-bottom: 1px solid var(--color-border-lt);
  vertical-align: middle;
}

.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: #fafafa; }

.actions { display: flex; gap: .35rem; flex-wrap: wrap; }

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--color-text-muted);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

/* ── Gallery ── */
.gallery-grid {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: .5rem;
}

.gallery-item {
  position: relative;
  width: 80px;
  height: 80px;
}

.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.gallery-item-del {
  position: absolute;
  top: -6px; right: -6px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--color-danger);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.upload-btn {
  display: inline-block;
  padding: .35rem .75rem;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: .8rem;
  color: var(--color-text-muted);
}

.upload-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }

.upload-preview img {
  max-width: 100%;
  max-height: 140px;
  border-radius: var(--radius);
  margin-top: .4rem;
  border: 1px solid var(--color-border);
}

/* ── Modal ── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
}

.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
}

.modal-header {
  display: flex;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border-lt);
}

.modal-header h2 { flex: 1; font-size: 1rem; font-weight: 600; }

.modal-close {
  background: none; border: none;
  font-size: 1.4rem; cursor: pointer;
  color: var(--color-text-muted);
  line-height: 1;
}

.modal-body {
  padding: 1.25rem;
  overflow-y: auto;
}

.modal-footer {
  display: flex; gap: .5rem;
  padding: .75rem 1.25rem;
  border-top: 1px solid var(--color-border-lt);
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: #1f2937;
  color: #fff;
  padding: .65rem 1.25rem;
  border-radius: var(--radius);
  font-size: .875rem;
  opacity: 0;
  pointer-events: none;
  z-index: 600;
  transition: opacity .25s;
}

.toast.show { opacity: 1; }

/* ── Icon button ── */
.icon-btn {
  background: none; border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: .2rem .4rem;
  border-radius: var(--radius);
  text-decoration: none;
}

.icon-btn:hover { color: var(--color-text); background: var(--color-bg); }

code { font-size: .85em; background: var(--color-bg); padding: .1em .3em; border-radius: 3px; }

small { font-size: .8rem; color: var(--color-text-muted); }