/**
 * School-only SNS – Styles (all English in code).
 * Mobile-first, high school audience.
 */

:root {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-border: #e2e6ea;
  --color-text: #1a1d21;
  --color-text-muted: #6b7280;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-accent: #7c3aed;
  --color-student-badge: #059669;
  --color-student-bg: #ecfdf5;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --radius: 10px;
  --radius-sm: 6px;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

#app-root {
  min-height: 100vh;
}

.app-wrapper {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

/* Header */
.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.app-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.app-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.15rem;
}

.app-header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-user-info {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.app-header-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.ghost-button {
  padding: 0.4rem 0.75rem;
  font-size: 0.875rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

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

/* Tabs */
.tab-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.tab-button {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.tab-button:hover {
  color: var(--color-text);
}

.tab-button.active {
  background: var(--color-surface);
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* Cards */
.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.card h2,
.card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.1rem;
}

/* Login */
.login-card {
  max-width: 420px;
}

.login-card h2 {
  font-size: 1.25rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 500;
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
}

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

.form-actions {
  margin-top: 0.5rem;
}

.form-actions.right {
  display: flex;
  justify-content: flex-end;
}

.primary-button {
  padding: 0.6rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s;
}

.primary-button:hover {
  background: var(--color-primary-hover);
}

.primary-button.small {
  padding: 0.4rem 1rem;
  font-size: 0.9rem;
}

/* Microsoft sign-in button */
.ms-signin-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-width: 220px;
  background: #2f2f2f !important;
  border: 1px solid #2f2f2f !important;
}

.ms-signin-btn:hover {
  background: #3f3f3f !important;
  border-color: #3f3f3f !important;
}

.ms-signin-btn .ms-icon::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 20px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 21 21'%3E%3Cpath fill='%23f35325' d='M1 1h9v9H1z'/%3E%3Cpath fill='%2381bc01' d='M11 1h9v9h-9z'/%3E%3Cpath fill='%2305a6f0' d='M1 11h9v9H1z'/%3E%3Cpath fill='%23ffba08' d='M11 11h9v9h-9z'/%3E%3C/svg%3E") no-repeat center;
}

.form-field input:disabled,
.form-field input[readonly] {
  background: var(--color-bg);
  color: var(--color-text-muted);
}

.radio-option {
  display: block;
  margin: 0.35rem 0;
  font-size: 0.9rem;
  cursor: pointer;
}

.radio-option input {
  margin-right: 0.5rem;
}

.verification-pending-banner {
  padding: 0.75rem 1rem;
  background: #fef3c7;
  border: 1px solid #f59e0b;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.muted {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* Home layout */
.home-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .home-layout {
    grid-template-columns: 280px 1fr;
  }
}

.home-left,
.home-right {
  min-width: 0;
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.schedule-table td {
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--color-border);
}

.schedule-table td:first-child {
  width: 3rem;
  color: var(--color-text-muted);
}

.upcoming-events {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.upcoming-item {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding: 0.25rem 0;
}

.space-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.space-pill {
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.space-pill:hover {
  background: var(--color-surface);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Post list */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-card {
  padding: 1rem;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.post-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: 0.35rem;
}

.post-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.post-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin: 0 0 0.5rem;
}

.post-author {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Spaces layout */
.spaces-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 768px) {
  .spaces-layout {
    grid-template-columns: 200px 1fr;
  }
}

.spaces-sidebar h2 {
  font-size: 1rem;
  margin: 0 0 0.75rem;
}

.space-list-vertical {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.space-item {
  padding: 0.6rem 0.75rem;
  text-align: left;
  font-size: 0.95rem;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s;
}

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

.space-item.active {
  background: var(--color-primary);
  color: white;
}

.space-header {
  margin-bottom: 1rem;
}

.space-header h2 {
  margin: 0 0 0.75rem;
}

.section-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s;
}

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

.chip.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* Student-only badge: clear boundary for teachers */
.student-only-badge {
  font-size: 0.65rem;
  padding: 0.15rem 0.4rem;
  background: var(--color-student-bg);
  color: var(--color-student-badge);
  border-radius: 999px;
  font-weight: 600;
}

.chip.active .student-only-badge {
  background: rgba(255, 255, 255, 0.3);
  color: white;
}

/* Notice for teachers in student-only sections */
.student-only-notice {
  padding: 0.75rem 1rem;
  background: var(--color-student-bg);
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-sm);
  color: var(--color-student-badge);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

/* Post composer */
.post-composer {
  margin-bottom: 1rem;
}

.composer-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.composer-title {
  font-size: 0.9rem;
  font-weight: 600;
}

.checkbox-inline {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Notifications */
.notification-list {
  margin: 0;
  padding-left: 1.25rem;
  list-style: disc;
}

.notification-list li {
  padding: 0.25rem 0;
  font-size: 0.9rem;
}

/* Profile */
.profile-dl {
  margin: 0 0 1rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1.5rem;
  font-size: 0.95rem;
}

.profile-dl dt {
  margin: 0;
  color: var(--color-text-muted);
}

.profile-dl dd {
  margin: 0;
}

/* Verification badges */
.verification-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 0.5rem;
}
.badge-pending  { background: #fef3c7; color: #92400e; }
.badge-approved { background: #d1fae5; color: #065f46; }
.badge-rejected { background: #fee2e2; color: #991b1b; }

/* Admin tab */
.admin-filter {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.admin-table-wrap {
  overflow-x: auto;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.admin-table th {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.admin-action-btn {
  padding: 0.25rem 0.6rem;
  font-size: 0.8rem;
  margin-right: 0.25rem;
}

/* ---- Comments ---- */
.comment-toggle-btn {
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  cursor: pointer;
  padding: 0.25rem 0;
  margin-top: 0.5rem;
  display: inline-block;
}
.comment-toggle-btn:hover { color: var(--color-primary); }

.comment-section {
  margin-top: 0.75rem;
  border-top: 1px solid var(--color-border);
  padding-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.comment-item {
  font-size: 0.85rem;
  line-height: 1.4;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--color-border);
}
.comment-item:last-of-type { border-bottom: none; }

.comment-author {
  font-weight: 600;
  color: var(--color-text);
}
.comment-text { color: var(--color-text); }
.comment-date { color: var(--color-text-muted); font-size: 0.78rem; }

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.5rem;
}
.comment-form textarea {
  width: 100%;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  resize: vertical;
  font-family: var(--font-sans);
}
.comment-form textarea:focus { outline: none; border-color: var(--color-primary); }

/* ---- Notifications ---- */
.notif-badge {
  display: inline-block;
  background: #ef4444;
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 0 0.35rem;
  margin-left: 0.3rem;
  vertical-align: middle;
  line-height: 1.4;
}

.notif-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}
.notif-header h2 { margin: 0; }

.notification-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.notif-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}
.notif-item:last-child { border-bottom: none; }
.notif-unread { background: #eff6ff; border-radius: var(--radius-sm); padding: 0.6rem 0.5rem; }

.notif-message { flex: 1; color: var(--color-text); }
.notif-time { color: var(--color-text-muted); font-size: 0.78rem; white-space: nowrap; }

.ghost-button.small { font-size: 0.8rem; padding: 0.25rem 0.6rem; }
.ghost-button.tiny  { font-size: 0.75rem; padding: 0.15rem 0.45rem; white-space: nowrap; }