/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
    padding-bottom: 80px;
}

/* Color Palette Variables */
:root {
    --primary-color: #2196F3;
    --success-color: #4CAF50;
    --warning-color: #FFC107;
    --error-color: #F44336;
    --purple-color: #9C27B0;
    --background-light: #ffffff;
    --background-dark: #f5f5f5;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --border-color: #e0e0e0;
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* Header Styles */
.app-header {
    background: var(--background-light);
    box-shadow: var(--shadow-light);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.app-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    background: none;
    border: none;
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-secondary);
}

.btn-icon:hover {
    background: var(--background-dark);
    color: var(--primary-color);
}

.btn-icon.connected {
    color: var(--success-color);
}

.btn-icon.disconnected {
    color: var(--error-color);
}

/* Main Content */
.app-main {
    padding: 6rem 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.content-section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-header h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* Time Zone Display */
.time-zone-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--background-light);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
}

#timezone-selector {
    border: none;
    background: none;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--background-light);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.stat-card.available { border-left: 4px solid var(--success-color); }
.stat-card.busy { border-left: 4px solid var(--warning-color); }
.stat-card.meeting { border-left: 4px solid var(--primary-color); }
.stat-card.offline { border-left: 4px solid var(--text-light); }

.stat-card i {
    font-size: 2rem;
    opacity: 0.8;
}

.stat-card.available i { color: var(--success-color); }
.stat-card.busy i { color: var(--warning-color); }
.stat-card.meeting i { color: var(--primary-color); }
.stat-card.offline i { color: var(--text-light); }

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Team Overview */
.team-overview {
    margin-bottom: 2rem;
}

.team-overview h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: var(--text-primary);
}

.team-members-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.team-member-card {
    background: var(--background-light);
    border-radius: var(--border-radius);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.team-member-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.member-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

.member-info {
    flex: 1;
}

.member-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.member-role {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.member-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-indicator.available { background: var(--success-color); }
.status-indicator.busy { background: var(--warning-color); }
.status-indicator.meeting { background: var(--primary-color); }
.status-indicator.offline { background: var(--text-light); }

/* Quick Actions */
.quick-actions h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: var(--text-primary);
}

.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.action-btn {
    background: var(--background-light);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
}

.action-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.action-btn i {
    font-size: 1.25rem;
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: #1976D2;
    transform: translateY(-1px);
    box-shadow: var(--shadow-light);
}

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

.btn-secondary:hover {
    background: var(--background-dark);
    border-color: var(--primary-color);
}

/* Team Controls */
.team-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 200px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--background-light);
    font-size: 0.95rem;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

#status-filter {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--background-light);
    font-size: 0.95rem;
    min-width: 150px;
}

/* Team List */
.team-list {
    display: grid;
    gap: 1rem;
}

.team-member-item {
    background: var(--background-light);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-light);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.team-member-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.team-member-item .member-avatar {
    width: 60px;
    height: 60px;
    font-size: 1.75rem;
}

.team-member-item .member-info {
    flex: 1;
}

.member-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.member-email {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.member-timezone {
    color: var(--text-light);
    font-size: 0.85rem;
}

.member-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border-radius: 8px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-content {
    background: var(--background-light);
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-medium);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    border-radius: 50%;
    transition: var(--transition);
}

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

.modal-form {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.5rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: normal;
    margin-bottom: 0;
}

.participants-list {
    max-height: 150px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem;
}

.participants-list label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    margin-bottom: 0;
    border-radius: 6px;
    transition: var(--transition);
}

.participants-list label:hover {
    background: var(--background-dark);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* Calendar Styles */
.calendar-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.calendar-controls button {
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.calendar-controls button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

#current-month-year {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.calendar-container {
    background: var(--background-light);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    margin-bottom: 2rem;
    overflow: hidden;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
}

.calendar-header {
    background: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.calendar-day {
    aspect-ratio: 1;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    min-height: 60px;
}

.calendar-day:hover {
    background: var(--background-dark);
}

.calendar-day.today {
    background: var(--primary-color);
    color: white;
}

.calendar-day.other-month {
    color: var(--text-light);
    background: var(--background-dark);
}

.calendar-day.has-meetings::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--warning-color);
    border-radius: 50%;
}

/* Meetings List */
.meetings-section h3 {
    margin-bottom: 1rem;
    font-size: 1.4rem;
    color: var(--text-primary);
}

.meetings-list {
    display: grid;
    gap: 1rem;
}

.meeting-item {
    background: var(--background-light);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-light);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.meeting-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.meeting-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
    gap: 1rem;
}

.meeting-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.meeting-time {
    color: var(--text-secondary);
    font-size: 0.9rem;
    flex-shrink: 0;
}

.meeting-details {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.4;
}

.meeting-participants {
    margin-top: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.participant-tag {
    background: var(--background-dark);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Rooms Grid */
.rooms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.room-card {
    background: var(--background-light);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
}

.room-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.room-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.room-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.room-location {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.room-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.room-status.available {
    background: #E8F5E8;
    color: var(--success-color);
}

.room-status.busy {
    background: #FFF3E0;
    color: var(--warning-color);
}

.room-details {
    margin-bottom: 1rem;
}

.room-capacity {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.room-equipment {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.equipment-tag {
    background: var(--background-dark);
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.room-actions {
    display: flex;
    gap: 0.5rem;
}

/* FAQ Styles */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--background-light);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-light);
    overflow: hidden;
    transition: var(--transition);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1.5rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--background-dark);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.6;
    animation: fadeIn 0.3s ease;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--background-light);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    padding: 0.75rem 0;
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: 8px;
    min-width: 60px;
}

.nav-item:hover,
.nav-item.active {
    color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
}

.nav-item i {
    font-size: 1.25rem;
}

.nav-item span {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
    background: var(--background-light);
    margin-top: 3rem;
    border-top: 1px solid var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-main {
        padding: 5rem 0.75rem 2rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-members-grid {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        grid-template-columns: 1fr;
    }
    
    .team-controls {
        flex-direction: column;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .calendar-day {
        min-height: 50px;
        font-size: 0.9rem;
    }
    
    .rooms-grid {
        grid-template-columns: 1fr;
    }
    
    .meeting-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .room-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .app-title {
        font-size: 1.25rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: 1rem;
    }
    
    .team-member-card {
        padding: 0.75rem;
    }
    
    .member-avatar {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }
    
    .calendar-day {
        min-height: 40px;
        font-size: 0.8rem;
    }
    
    .bottom-nav {
        padding: 0.5rem 0;
    }
    
    .nav-item span {
        font-size: 0.7rem;
    }
}

/* Loading States */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.hidden { display: none !important; }
.visible { display: block !important; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 1rem; }
.mt-1 { margin-top: 1rem; }
.mb-1 { margin-bottom: 1rem; }
.p-1 { padding: 1rem; }

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
button:focus,
input:focus,
select:focus,
textarea:focus,
.nav-item:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --text-secondary: #000000;
        --background-dark: #ffffff;
    }
}