:root {
    --bg-main: #0B0F17;
    --bg-card: #121826;
    --bg-layer: #1A2233;
    --primary: #3B82F6;
    --primary-hover: #2563EB;
    --primary-active: #1D4ED8;
    --accent: #3B82F6;
    --accent-light: #60A5FA;
    --text-main: #FFFFFF;
    --text-secondary: #C7D2FE;
    --text-muted: #94A3B8;
    --border: #2A3448;
    --input-bg: #1E293B;
    --sidebar-w: 260px;
    --sidebar-collapsed-w: 68px;
    --transition: 0.3s cubic-bezier(.4,0,.2,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* ── Login screen ── */
#login-screen {
    position: fixed;
    inset: 0;
    background: var(--bg-main);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9000;
    opacity: 1;
    transition: opacity 0.35s ease;
}

#login-screen.fade-out { opacity: 0; pointer-events: none; }

#login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 48px 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 360px;
    text-align: center;
    box-shadow: 0 24px 60px rgba(0,0,0,0.5);
}

#login-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

#login-logo-title { font-size: 16px; font-weight: 700; color: var(--text-main); line-height: 1.2; text-align: left; }
#login-logo-sub   { font-size: 12px; color: var(--text-muted); text-align: left; }

#login-heading {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 4px;
}

#login-sub {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 260px;
    margin-bottom: 8px;
}

#login-discord-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 12px 20px;
    background: #5865F2;
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: opacity 0.15s, transform 0.15s;
    margin-top: 4px;
}

#login-discord-btn { text-decoration: none; }
#login-discord-btn svg { width: 20px; height: 20px; }
#login-discord-btn:hover { opacity: 0.88; transform: translateY(-1px); }
#login-discord-btn:active { transform: translateY(0); }

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-card);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

.layout {
    display: flex;
    height: 100vh;
}

/* ── Sidebar ── */
.sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    background: var(--bg-card);
    display: flex;
    flex-direction: column;
    padding: 20px 12px;
    transition: width var(--transition), min-width var(--transition);
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-w);
    min-width: var(--sidebar-collapsed-w);
}

/* ── Logo row ── */
.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 6px;
    margin-bottom: 28px;
    min-width: 0;
}

.logo-icon { flex-shrink: 0; display: flex; }

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    overflow: hidden;
    max-width: 200px;
    opacity: 1;
    transition: max-width var(--transition), opacity 0.2s ease;
    white-space: nowrap;
}

.sidebar.collapsed .logo-text {
    max-width: 0;
    opacity: 0;
}

.logo-title { font-size: 15px; font-weight: 700; color: var(--text-main); }
.logo-sub   { font-size: 12px; font-weight: 400; color: var(--text-main); }

/* Collapse button */
.sidebar-collapse-btn {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    padding: 0;
    transition: background 0.15s, color 0.15s;
}

.sidebar-collapse-btn:hover { background: var(--bg-layer); color: var(--text-main); }
.sidebar-collapse-btn svg { width: 26px; height: 26px; }

.page-title-row {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.page-title-row h1 { margin-bottom: 4px; }

/* ── Nav ── */
.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
}

.nav-category {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding: 10px 8px 4px;
    overflow: hidden;
    max-width: 200px;
    opacity: 1;
    white-space: nowrap;
    transition: max-width var(--transition), opacity 0.2s ease, padding var(--transition);
}

.sidebar.collapsed .nav-category {
    max-width: 0;
    opacity: 0;
    padding: 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 8px;
    border-radius: 8px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: background 0.15s, color 0.15s, gap var(--transition), padding var(--transition);
    cursor: pointer;
    min-width: 0;
}

.nav-item:hover  { background: var(--bg-layer); color: var(--text-secondary); }
.nav-item.active { background: var(--accent-bg, rgba(59,130,246,0.15)); color: var(--accent); }

.nav-item span {
    white-space: nowrap;
    overflow: hidden;
    max-width: 160px;
    opacity: 1;
    transition: max-width var(--transition), opacity 0.15s ease;
    flex-shrink: 0;
}

.sidebar.collapsed .nav-item span { max-width: 0; opacity: 0; }
.sidebar.collapsed .nav-item { gap: 0; justify-content: center; }

.nav-icon { width: 18px; height: 18px; flex-shrink: 0; }

/* Tooltip */
.nav-tooltip-popup {
    position: fixed;
    background: var(--bg-layer);
    border: 1px solid var(--border);
    color: var(--text-main);
    font-size: 13px;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    padding: 6px 12px;
    border-radius: 8px;
    white-space: nowrap;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
    z-index: 9999;
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.nav-tooltip-popup.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ── User ── */
.sidebar-user {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: 10px;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.15s, gap var(--transition), padding var(--transition);
    min-width: 0;
}

.sidebar-user:hover { background: var(--bg-layer); }

.sidebar.collapsed .sidebar-user { gap: 0; justify-content: center; padding: 8px 0; }

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-name {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    max-width: 200px;
    opacity: 1;
    flex: 1;
    min-width: 0;
    transition: max-width var(--transition), opacity 0.2s ease;
}

.sidebar.collapsed .user-name { max-width: 0; opacity: 0; }

.user-chevrons {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
    flex-shrink: 0;
    overflow: hidden;
    max-width: 18px;
    opacity: 1;
    transition: max-width var(--transition), opacity 0.2s ease;
}

.sidebar.collapsed .user-chevrons { max-width: 0; opacity: 0; }

/* User dropdown */
.user-dropdown {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--bg-layer);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px;
    z-index: 100;
    box-shadow: 0 -8px 24px rgba(0,0,0,0.4);
    min-width: 200px;
}

.user-dropdown.hidden { display: none; }

.user-dropdown-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    margin-bottom: 4px;
}

.user-dropdown-name { font-size: 13px; font-weight: 700; color: var(--text-main); white-space: nowrap; }

.user-dropdown-divider { height: 1px; background: var(--border); margin: 4px 0; }

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 9px 10px;
    border-radius: 8px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    text-align: left;
}

.user-dropdown-item svg { width: 16px; height: 16px; flex-shrink: 0; }
.user-dropdown-item:hover { background: var(--bg-card); color: var(--text-main); }
.user-dropdown-item.logout:hover { color: #F87171; }

/* ── Main content ── */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: 32px 36px;
    background: var(--bg-main);
    margin: 12px 12px 12px 0;
    border-radius: 16px;
    transition: margin var(--transition);
}

.page { display: none; }
.page.active { display: block; }

.page-header { margin-bottom: 32px; }
.page-header h1 { font-size: 26px; font-weight: 700; color: var(--text-main); margin-bottom: 4px; }
.page-header p  { font-size: 14px; color: var(--text-muted); }

/* Cards */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    height: calc((100vh - 180px) / 6.5);
    margin: 0 -20px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px;
    display: flex;
    flex-direction: column;
}

.card-label { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }
.card-value  { font-size: 40px; font-weight: 700; color: var(--text-main); }

/* Welcome card */
.welcome-card {
    margin: 24px -20px 0;
    width: calc(100% + 40px);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 48px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
}

.welcome-icon {
    width: 56px;
    height: 56px;
    color: var(--accent);
    opacity: 0.85;
}

.welcome-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
}

.welcome-text {
    font-size: 14px;
    color: var(--text-muted);
    max-width: 380px;
    line-height: 1.6;
}

.welcome-btn {
    margin-top: 8px;
    padding: 10px 24px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: opacity 0.15s;
}

.welcome-btn:hover { opacity: 0.85; }

/* Settings */
.settings-section-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
}

.theme-grid {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.theme-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 16px;
    border-radius: 12px;
    border: 2px solid var(--border);
    background: var(--bg-card);
    transition: border-color 0.2s, transform 0.15s;
    width: 110px;
}

.theme-card:hover { transform: translateY(-2px); border-color: var(--text-muted); }
.theme-card.active { border-color: var(--accent, #3B82F6); }
.theme-card span { font-size: 13px; font-weight: 500; color: var(--text-main); }

.theme-preview {
    width: 70px;
    height: 48px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.1);
}

.blue-preview  { background: linear-gradient(135deg, #0B0F17 50%, #3B82F6 100%); }
.green-preview { background: linear-gradient(135deg, #0A0F0E 50%, #14B8A6 100%); }
.black-preview { background: linear-gradient(135deg, #000000 50%, #222 100%); }
.white-preview { background: linear-gradient(135deg, #e0e0e0 50%, #ffffff 100%); }

.settings-divider { height: 1px; background: var(--border); margin: 24px 0; }

.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.settings-row-info { display: flex; flex-direction: column; gap: 4px; }
.settings-row-title { font-size: 14px; font-weight: 500; color: var(--text-main); }
.settings-row-desc  { font-size: 12px; color: var(--text-muted); }

/* Custom select */
.custom-select {
    position: relative;
    min-width: 160px;
    user-select: none;
}

.custom-select-selected {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-main);
    font-size: 13px;
    font-weight: 500;
    padding: 9px 14px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.custom-select-selected:hover { border-color: var(--text-muted); background: var(--bg-layer); }
.custom-select.open .custom-select-selected { border-color: var(--accent); }

.custom-select-selected svg {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.custom-select.open .custom-select-selected svg { transform: rotate(180deg); }

.custom-select-list {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: var(--bg-layer);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 6px;
    z-index: 200;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.custom-select-list.hidden { display: none; }

.custom-select-item {
    padding: 9px 12px;
    border-radius: 7px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.12s, color 0.12s;
}

.custom-select-item:hover { background: var(--bg-card); color: var(--text-main); }
.custom-select-item.active { color: var(--accent); background: var(--accent-bg); }

/* Toast notifications */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 9999;
    pointer-events: none;
}

.toast {
    background: var(--bg-layer);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-main);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
}

.toast.show { opacity: 1; transform: translateY(0); }

.toast-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

/* ── Roster ── */
.roster-page-header {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.roster-search-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    max-width: 420px;
    margin-top: 12px;
}

.roster-search-bar svg { width: 16px; height: 16px; color: var(--text-muted); flex-shrink: 0; }

.roster-search-bar input {
    background: none;
    border: none;
    outline: none;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    width: 100%;
}

.roster-search-bar input::placeholder { color: var(--text-muted); }

.roster-list { display: flex; flex-direction: column; gap: 8px; }

.roster-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 20px;
    display: grid;
    grid-template-columns: 40px 2fr 1fr 1fr 1fr 1fr 90px;
    align-items: center;
    gap: 16px;
    transition: border-color 0.15s;
}

.roster-card:hover { border-color: var(--text-muted); }

.roster-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.roster-name  { font-size: 14px; font-weight: 600; color: var(--text-main); }
.roster-cid   { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

.roster-field { display: flex; flex-direction: column; gap: 2px; }
.roster-field-label { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.roster-field-value { font-size: 13px; font-weight: 500; color: var(--text-main); }

.roster-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.roster-badge.active   { background: rgba(20,184,166,0.15); color: #14B8A6; }
.roster-badge.inactive { background: rgba(148,163,184,0.15); color: #94A3B8; }

/* ── Apply as Mentor ── */
.apply-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px 28px;
    margin-bottom: 16px;
}

.apply-section-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 18px;
}

.apply-req-list { display: flex; flex-direction: column; }

.apply-req {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.apply-req:last-child { border-bottom: none; padding-bottom: 0; }

.apply-req-icon {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: rgba(248,113,113,0.12);
    color: #F87171;
    transition: background 0.2s, color 0.2s;
}

.apply-req-icon.pass { background: rgba(20,184,166,0.12); color: #14B8A6; }
.apply-req-icon.fail { background: rgba(248,113,113,0.12); color: #F87171; }

.apply-req-text {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.apply-req-label { font-size: 14px; font-weight: 600; color: var(--text-main); }
.apply-req-desc  { font-size: 12px; color: var(--text-muted); }

.apply-req-badge {
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    background: var(--bg-layer);
    color: var(--text-muted);
    border: 1px solid var(--border);
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.apply-req-badge.pass { background: rgba(20,184,166,0.12); color: #14B8A6; border-color: transparent; }
.apply-req-badge.fail { background: rgba(248,113,113,0.12); color: #F87171; border-color: transparent; }

.apply-form { display: flex; flex-direction: column; gap: 22px; }

.apply-field { display: flex; flex-direction: column; gap: 8px; }

.apply-field label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
}

.apply-field textarea,
.apply-field input[type="text"] {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    line-height: 1.6;
    padding: 12px 14px;
    outline: none;
    resize: vertical;
    transition: border-color 0.15s;
    width: 100%;
}

.apply-field textarea:focus,
.apply-field input[type="text"]:focus { border-color: var(--accent); }

.apply-field textarea::placeholder,
.apply-field input[type="text"]::placeholder { color: var(--text-muted); }

.apply-form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding-top: 4px;
    flex-wrap: wrap;
}

.apply-note {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
    max-width: 380px;
}

.apply-submit-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 11px 26px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: opacity 0.15s, transform 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
}

.apply-submit-btn:hover { opacity: 0.85; transform: translateY(-1px); }
.apply-submit-btn:active { transform: translateY(0); }
.apply-submit-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.apply-locked {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    padding: 40px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-align: center;
}

.apply-locked svg {
    width: 52px;
    height: 52px;
    color: var(--text-muted);
    opacity: 0.4;
}

.apply-locked-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
}

.apply-locked p {
    font-size: 13px;
    color: var(--text-muted);
    max-width: 360px;
    line-height: 1.6;
}

/* ── Courses / Sessions ── */
.courses-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
}

.courses-header .page-title-row { margin: 0; }

.create-session-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: opacity 0.15s, transform 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
}

.create-session-btn:hover { opacity: 0.85; transform: translateY(-1px); }
.create-session-btn.hidden { display: none; }

.sessions-list { display: flex; flex-direction: column; gap: 8px; }

.sessions-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 56px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
}

.sessions-empty svg { width: 48px; height: 48px; opacity: 0.3; }
.sessions-empty-title { font-size: 15px; font-weight: 600; color: var(--text-main); }

.session-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    transition: border-color 0.15s, transform 0.15s;
}

.session-card:hover { border-color: var(--accent); transform: translateY(-1px); }

.session-card-body { flex: 1; min-width: 0; }

.session-card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.session-card-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }

.session-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 500px;
}

.session-card-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
    flex-shrink: 0;
}

.session-participants-badge {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    color: var(--text-muted);
}

.session-participants-badge svg { width: 14px; height: 14px; }

/* Type badges */
.session-type-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    white-space: nowrap;
    flex-shrink: 0;
}

.session-type-badge.obs     { background: rgba(100,116,139,0.15); color: #94A3B8; }
.session-type-badge.s1      { background: rgba(20,184,166,0.15);  color: #14B8A6; }
.session-type-badge.s2      { background: rgba(59,130,246,0.15);  color: #60A5FA; }
.session-type-badge.s3      { background: rgba(139,92,246,0.15);  color: #A78BFA; }
.session-type-badge.general { background: rgba(245,158,11,0.15);  color: #FCD34D; }

/* Status badge */
.session-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.session-status-badge.live { background: rgba(20,184,166,0.12); color: #14B8A6; }
.session-status-badge.live::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #14B8A6;
    animation: livepulse 1.5s ease infinite;
}

@keyframes livepulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* Card buttons */
.btn-join {
    padding: 7px 18px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 7px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: opacity 0.15s;
}

.btn-join:hover { opacity: 0.85; }

.btn-leave {
    padding: 7px 18px;
    background: rgba(248,113,113,0.1);
    color: #F87171;
    border: 1px solid rgba(248,113,113,0.2);
    border-radius: 7px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-leave:hover { background: rgba(248,113,113,0.2); }

.btn-manage {
    padding: 7px 18px;
    background: var(--bg-layer);
    color: var(--text-main);
    border: 1px solid var(--border);
    border-radius: 7px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: border-color 0.15s;
}

.btn-manage:hover { border-color: var(--accent); }

/* ── Modals ── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 8000;
    padding: 20px;
}

.modal-overlay.hidden { display: none; }

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    width: 100%;
    max-width: 500px;
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 24px 60px rgba(0,0,0,0.5);
    overflow: hidden;
}

.modal.modal-lg { max-width: 660px; }

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    gap: 12px;
}

.modal-header h3 { font-size: 17px; font-weight: 700; color: var(--text-main); }

.modal-close-btn {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
    flex-shrink: 0;
}

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

.modal-body {
    padding: 20px 24px;
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-form {
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    overflow-y: auto;
    flex: 1;
}

.modal-field { display: flex; flex-direction: column; gap: 7px; }
.modal-field label { font-size: 13px; font-weight: 600; color: var(--text-main); }
.optional-label { font-weight: 400; color: var(--text-muted); font-size: 12px; }

.modal-field-row { display: flex; gap: 12px; }
.modal-field-row .modal-field { flex: 1; }

.modal-input,
.modal-textarea {
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    padding: 10px 12px;
    outline: none;
    transition: border-color 0.15s;
    width: 100%;
    box-sizing: border-box;
}

.modal-input:focus, .modal-textarea:focus { border-color: var(--accent); }
.modal-textarea { resize: vertical; }
.modal-input::placeholder, .modal-textarea::placeholder { color: var(--text-muted); }

select.modal-input {
    appearance: none;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2394A3B8'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 16px;
    padding-right: 32px;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    flex-wrap: wrap;
}

/* Shared buttons */
.btn-primary {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 10px 20px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: opacity 0.15s;
}

.btn-primary:hover { opacity: 0.85; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-secondary {
    padding: 10px 20px;
    background: var(--bg-layer);
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}

.btn-secondary:hover { color: var(--text-main); border-color: var(--text-muted); }

.btn-danger {
    padding: 10px 20px;
    background: rgba(248,113,113,0.1);
    color: #F87171;
    border: 1px solid rgba(248,113,113,0.2);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-danger:hover { background: rgba(248,113,113,0.2); }

.btn-success {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 10px 20px;
    background: rgba(20,184,166,0.12);
    color: #14B8A6;
    border: 1px solid rgba(20,184,166,0.25);
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: background 0.15s;
}

.btn-success:hover { background: rgba(20,184,166,0.22); }

/* Session detail modal */
.detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.detail-meta-item { display: flex; align-items: center; gap: 6px; }
.detail-meta-item svg { width: 14px; height: 14px; flex-shrink: 0; }

.detail-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 14px 16px;
    background: var(--bg-layer);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.detail-section-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.detail-count {
    background: var(--bg-layer);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 1px 8px;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: none;
    letter-spacing: 0;
    font-weight: 500;
}

.participant-list { display: flex; flex-direction: column; gap: 6px; }

.participant-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-layer);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.participant-avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.participant-info { flex: 1; }
.participant-name { font-size: 13px; font-weight: 600; color: var(--text-main); }
.participant-cid  { font-size: 11px; color: var(--text-muted); }

.participant-kick-btn {
    padding: 4px 12px;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.participant-kick-btn:hover { color: #F87171; border-color: rgba(248,113,113,0.3); background: rgba(248,113,113,0.08); }

.participant-empty { font-size: 13px; color: var(--text-muted); padding: 16px 0; text-align: center; }

.session-join-blocked {
    font-size: 12px;
    color: var(--text-muted);
    text-align: right;
    max-width: 110px;
    line-height: 1.4;
}