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

:root {
  --bg-base:       #0A0F1E;
  --bg-surface:    #111827;
  --bg-elevated:   #1E2A3A;
  --bg-hover:      #243040;
  --bg-card:       #162032;
  --border:        #1E3A5A;
  --border-light:  #2A4A6A;

  --accent:        #6366F1;
  --accent-dim:    #4F46E5;
  --accent-glow:   rgba(99, 102, 241, 0.25);
  --teal:          #14B8A6;
  --teal-dim:      #0D9488;
  --amber:         #F59E0B;
  --red:           #EF4444;
  --green:         #10B981;

  --text-primary:  #F0F6FF;
  --text-secondary:#94A3B8;
  --text-muted:    #4A6080;

  --font-ui:   'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 22px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-accent: 0 0 20px rgba(99,102,241,0.3);

  --sidebar-w: 260px;
  --header-h:  60px;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-ui);
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ─── Scrollbars ────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ─── Utilities ─────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.font-mono { font-family: var(--font-mono); }
.text-muted { color: var(--text-secondary); }
.text-accent { color: var(--accent); }
.text-teal { color: var(--teal); }
.text-red { color: var(--red); }
.text-green { color: var(--green); }
.text-amber { color: var(--amber); }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ─── Auth Screen ───────────────────────────────────────────────────────────── */
#auth-screen {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(ellipse 60% 50% at 70% 20%, rgba(99,102,241,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(20,184,166,0.08) 0%, transparent 70%),
    var(--bg-base);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
}

.auth-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--teal) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.auth-logo .logo-text {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.auth-logo .logo-text span { color: var(--accent); }

.auth-tagline {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 32px;
  line-height: 1.5;
}

.auth-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg-base);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 28px;
}

.auth-tab {
  flex: 1;
  padding: 9px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-ui);
}

.auth-tab.active {
  background: var(--bg-elevated);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* ─── Forms ─────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--text-secondary);
  margin-bottom: 7px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  color: var(--text-primary);
  font-family: var(--font-ui);
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group input::placeholder { color: var(--text-muted); }
.form-group select option { background: var(--bg-elevated); }
.form-group textarea { resize: vertical; min-height: 90px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* ─── Buttons ───────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.18s;
  text-decoration: none;
  white-space: nowrap;
  outline: none;
}

.btn:focus-visible { box-shadow: 0 0 0 3px var(--accent-glow); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
  padding: 12px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 2px 12px rgba(99,102,241,0.35);
}

.btn-primary:hover { background: var(--accent-dim); box-shadow: 0 4px 16px rgba(99,102,241,0.45); }
.btn-primary:active { transform: translateY(1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-hover); border-color: var(--border-light); }

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 12px;
}
.btn-ghost:hover { background: var(--bg-elevated); color: var(--text-primary); }

.btn-danger {
  background: rgba(239,68,68,0.12);
  color: var(--red);
  border: 1px solid rgba(239,68,68,0.25);
}
.btn-danger:hover { background: rgba(239,68,68,0.2); }

.btn-icon {
  padding: 8px;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
}

.btn-sm { padding: 7px 13px; font-size: 13px; }
.btn-xs { padding: 5px 10px; font-size: 12px; }

/* ─── App Shell ─────────────────────────────────────────────────────────────── */
#app-shell {
  display: flex;
  height: 93dvh;
  overflow: hidden;
}

/* ─── Sidebar ───────────────────────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow: hidden;
  transition: transform 0.25s ease;
  z-index: 100;
}

.sidebar-header {
  padding: 18px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.sidebar-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--teal) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

.sidebar-logo span { color: var(--accent); }

.sidebar-section-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 16px 16px 8px;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px;
}

.class-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 10px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s;
  margin-bottom: 2px;
}

.class-item:hover { background: var(--bg-elevated); }
.class-item.active { background: rgba(99,102,241,0.12); }
.class-item.active .class-item-name { color: var(--accent); }

.class-item-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  color: #fff;
}

.class-item-meta { flex: 1; min-width: 0; }
.class-item-name { font-size: 13px; font-weight: 600; }
.class-item-sub { font-size: 11px; color: var(--text-secondary); }

.class-item-badge {
  font-size: 10px;
  padding: 2px 7px;
  border-radius: 999px;
  font-weight: 600;
}

.badge-pending { background: rgba(245,158,11,0.15); color: var(--amber); }
.badge-approved { background: rgba(16,185,129,0.12); color: var(--green); }
.badge-rejected { background: rgba(239,68,68,0.12); color: var(--red); }

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding: 14px 12px;
  flex-shrink: 0;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  color: #fff;
}

.user-info { flex: 1; min-width: 0; }
.user-name { font-size: 13px; font-weight: 600; }
.user-role {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: capitalize;
}

/* ─── Main Content ──────────────────────────────────────────────────────────── */
#main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

/* ─── Top Header ────────────────────────────────────────────────────────────── */
.top-header {
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-shrink: 0;
  background: var(--bg-surface);
}

.top-header h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.header-actions { display: flex; align-items: center; gap: 10px; }

#menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
  font-size: 20px;
}

/* ─── Page Container ────────────────────────────────────────────────────────── */
.page-container {
  flex: 1;
  overflow-y: auto;
  padding: 28px 24px;
}

/* ─── Tabs ──────────────────────────────────────────────────────────────────── */
.tab-nav {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 28px;
}

.tab-btn {
  padding: 10px 18px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-ui);
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: -1px;
}

.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ─── Dashboard / Welcome ───────────────────────────────────────────────────── */
.welcome-hero {
  background: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(20,184,166,0.04) 100%);
  border: 1px solid rgba(99,102,241,0.15);
  border-radius: var(--radius-xl);
  padding: 40px 36px;
  margin-bottom: 28px;
}

.welcome-hero h2 {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 10px;
}

.welcome-hero p { color: var(--text-secondary); font-size: 15px; line-height: 1.6; max-width: 500px; }

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 4px;
}

.stat-card .stat-label {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ─── Class Grid ────────────────────────────────────────────────────────────── */
.classes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.class-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.class-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  opacity: 0;
  transition: opacity 0.2s;
}

.class-card:hover { border-color: var(--border-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.class-card:hover::before { opacity: 1; }

.class-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 14px;
}

.class-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

.class-card-name { font-size: 16px; font-weight: 700; margin-bottom: 4px; letter-spacing: -0.2px; }
.class-card-dept { font-size: 12px; color: var(--text-secondary); }

.class-card-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  font-weight: 500;
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

/* ─── Section / Panel ───────────────────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-header h3 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.2px;
}

/* ─── Roster / Credential Cards ─────────────────────────────────────────────── */
.roster-table-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 13px 16px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-elevated); }

.cred-value {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--teal);
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.cred-value::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(20,184,166,0.08), transparent);
  transition: left 0.4s ease;
}

.cred-value:hover::after { left: 140%; }
.cred-value:hover { border-color: var(--teal-dim); box-shadow: 0 0 0 2px rgba(20,184,166,0.12); }

/* Student credential view */
.my-cred-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.my-cred-header {
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(20,184,166,0.06));
  border-bottom: 1px solid var(--border);
  padding: 28px 28px 22px;
}

.my-cred-header h3 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  font-weight: 600;
  margin-bottom: 6px;
}

.my-cred-header .reg-number {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 2px;
}

.cred-fields-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  padding: 28px;
}

.cred-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cred-field-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.7px;
  color: var(--text-muted);
}

.cred-field-value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-primary);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 13px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.cred-field-value::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(99,102,241,0.06), transparent);
  transition: left 0.4s ease;
}

.cred-field-value:hover::after { left: 140%; }
.cred-field-value:hover { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-glow); color: var(--teal); }

.cred-copy-icon { font-size: 13px; opacity: 0.5; flex-shrink: 0; }
.cred-field-value:hover .cred-copy-icon { opacity: 1; color: var(--accent); }

/* ─── Messages ──────────────────────────────────────────────────────────────── */
.message-list { display: flex; flex-direction: column; gap: 10px; }

.message-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  transition: border-color 0.15s;
  cursor: pointer;
}

.message-card:hover { border-color: var(--border-light); }
.message-card.urgent { border-color: rgba(245,158,11,0.4); background: rgba(245,158,11,0.03); }
.message-card.private { border-left: 3px solid var(--accent); }

.message-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.message-title {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.1px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.urgent-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(245,158,11,0.15);
  color: var(--amber);
  font-weight: 600;
  border: 1px solid rgba(245,158,11,0.3);
}

.private-badge {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(99,102,241,0.12);
  color: var(--accent);
  font-weight: 600;
  border: 1px solid rgba(99,102,241,0.25);
}

.message-meta { font-size: 12px; color: var(--text-secondary); white-space: nowrap; }

.message-preview {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.message-full-content {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  white-space: pre-wrap;
}

/* ─── Members ───────────────────────────────────────────────────────────────── */
.member-list { display: flex; flex-direction: column; gap: 8px; }

.member-row {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 13px 16px;
  transition: border-color 0.15s;
}

.member-row:hover { border-color: var(--border-light); }

.member-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.member-info { flex: 1; min-width: 0; }
.member-name { font-size: 14px; font-weight: 600; }
.member-reg { font-size: 12px; color: var(--text-secondary); font-family: var(--font-mono); }

.role-badge {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 600;
}

.role-instructor { background: rgba(99,102,241,0.12); color: var(--accent); }
.role-cr { background: rgba(20,184,166,0.1); color: var(--teal); }
.role-student { background: rgba(148,163,184,0.1); color: var(--text-secondary); }

/* ─── Modal ─────────────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
  animation: fadeIn 0.15s ease;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { transform: translateY(16px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  max-height: 90dvh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.2s ease;
}

.modal-header {
  padding: 24px 24px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background: var(--bg-surface);
  z-index: 1;
}

.modal-header h3 { font-size: 17px; font-weight: 700; letter-spacing: -0.2px; }

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all 0.15s;
}

.modal-close:hover { background: var(--bg-hover); color: var(--text-primary); }

.modal-body { padding: 24px; }
.modal-footer { padding: 20px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ─── Toast / Notifications ─────────────────────────────────────────────────── */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 13px 18px;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.2s ease;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 300px;
  pointer-events: auto;
}

.toast.success { border-color: rgba(16,185,129,0.35); }
.toast.success::before { content: '✓'; color: var(--green); font-weight: 700; }
.toast.error { border-color: rgba(239,68,68,0.35); }
.toast.error::before { content: '✕'; color: var(--red); font-weight: 700; }
.toast.info::before { content: '◆'; color: var(--accent); font-weight: 700; }

/* ─── Empty States ──────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
}

.empty-state .empty-icon {
  font-size: 40px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state h4 { font-size: 16px; font-weight: 600; color: var(--text-primary); margin-bottom: 8px; }
.empty-state p { font-size: 14px; line-height: 1.5; max-width: 280px; margin: 0 auto 20px; }

/* ─── Loading ───────────────────────────────────────────────────────────────── */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9000;
  gap: 20px;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--bg-elevated);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ─── Invite Share ──────────────────────────────────────────────────────────── */
.invite-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.invite-link {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--teal);
  word-break: break-all;
}

/* ─── Compose message ───────────────────────────────────────────────────────── */
.compose-options {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.toggle-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-ui);
}

.toggle-pill.active-urgent { border-color: rgba(245,158,11,0.4); background: rgba(245,158,11,0.08); color: var(--amber); }
.toggle-pill.active-private { border-color: rgba(99,102,241,0.4); background: rgba(99,102,241,0.08); color: var(--accent); }

/* ─── Roster upload ─────────────────────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  color: var(--text-secondary);
}

.upload-zone:hover, .upload-zone.dragging {
  border-color: var(--accent);
  background: rgba(99,102,241,0.04);
  color: var(--text-primary);
}

/* ─── Approval panel ────────────────────────────────────────────────────────── */
.approval-card {
  background: rgba(245,158,11,0.04);
  border: 1px solid rgba(245,158,11,0.2);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.approval-actions { display: flex; gap: 8px; margin-left: auto; }

/* ─── Info box ──────────────────────────────────────────────────────────────── */
.info-box {
  background: rgba(99,102,241,0.06);
  border: 1px solid rgba(99,102,241,0.2);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

footer{
  text-align: center;
  font-size: 12px;
  color: var(--text-secondary);
  padding: 20px 0;
}

footer p{
  margin: 0;
}

footer p a{
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
}

/* ─── Responsive ────────────────────────────────────────────────────────────── */
@media (max-width: 720px) {
  :root { --sidebar-w: 100%; }

  #sidebar {
    position: fixed;
    inset: 0;
    transform: translateX(-100%);
    z-index: 200;
    width: 280px;
  }

  #sidebar.open { transform: translateX(0); box-shadow: 4px 0 40px rgba(0,0,0,0.6); }

  #menu-toggle { display: flex !important; }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 199;
  }

  .sidebar-overlay.visible { display: block; }

  .top-header { padding: 0 16px; }
  .page-container { padding: 20px 16px; }
  .form-row { grid-template-columns: 1fr; }
  .cred-fields-grid { grid-template-columns: 1fr; }
  .auth-card { padding: 28px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}