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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --light: #f8fafc;
    --dark: #0f172a;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --bg-gradient-start: #667eea;
    --bg-gradient-end: #764ba2;
    --card-bg: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --input-bg: #ffffff;
    --input-border: #e2e8f0;
}

[data-theme="dark"] {
    --light: #1e293b;
    --dark: #f1f5f9;
    --border: #334155;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
    --bg-gradient-start: #1e293b;
    --bg-gradient-end: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --input-bg: #334155;
    --input-border: #475569;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
}

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

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* Auth Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.6s ease;
}

.auth-card {
    background: var(--card-bg);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 480px;
    padding: 40px 14px;
    animation: fadeIn 0.8s ease;
    transition: background 0.3s ease;
}

.auth-header h1 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 700;
    word-break: break-word;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
}

.form-group input,
.form-group select {
    padding: 14px 16px;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: var(--input-bg);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.form-group small {
    font-size: 13px;
    color: var(--text-secondary);
}

.password-input {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input input {
    width: 100%;
    padding-right: 48px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    border-radius: 8px;
}

.toggle-password:hover {
    color: var(--primary);
    background: var(--light);
}

.eye-icon {
    stroke-width: 2;
}

.btn {
    padding: 14px 28px;
    border: none;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

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

.btn-danger:hover {
    background: #dc2626;
}

.auth-footer {
    text-align: center;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.auth-footer p {
    color: var(--text-secondary);
    font-size: 15px;
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.auth-footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Navbar */
.navbar {
    background: var(--card-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-brand h2 {
    font-size: 22px;
    color: var(--text-primary);
    font-weight: 700;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s;
    padding: 8px 16px;
    border-radius: 8px;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: all 0.3s;
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 32px;
    background: var(--card-bg);
    min-height: calc(100vh - 80px);
    animation: fadeIn 0.6s ease;
}

.page-header {
    margin-bottom: 40px;
    animation: fadeIn 0.8s ease;
}

.page-header h1 {
    font-size: 36px;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 700;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 18px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 20px;
    padding: 32px;
    display: flex;
    align-items: center;
    gap: 20px;
    color: white;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
    transition: all 0.3s ease;
    animation: fadeIn 1s ease;
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
}

.stat-icon {
    font-size: 48px;
    animation: pulse 2s infinite;
}

.stat-content h3 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-content p {
    font-size: 15px;
    opacity: 0.9;
}

/* Section */
.section {
    margin-bottom: 48px;
    animation: fadeIn 1.2s ease;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}

.section-header h2 {
    font-size: 28px;
    color: var(--dark);
    font-weight: 700;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--secondary);
}

.empty-state p {
    font-size: 20px;
    margin-bottom: 32px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

/* Admin Badge */
.admin-badge {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

/* Notification */
.notification {
    position: fixed;
    top: 24px;
    right: 24px;
    padding: 16px 24px;
    background: var(--card-bg);
    color: var(--text-primary);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
}

.notification.success {
    border-left: 4px solid var(--success);
}

.notification.error {
    border-left: 4px solid var(--danger);
}

.notification-icon {
    font-size: 24px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 32px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: fadeIn 0.4s ease;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-header h2 {
    font-size: 24px;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.3s;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.modal-close:hover {
    color: var(--danger);
    background: var(--light);
}

.modal-footer {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    justify-content: flex-end;
}

textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s ease;
    resize: vertical;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

/* Building Card */
.building-card {
    cursor: pointer;
    text-align: center;
    padding: 32px 24px;
}

.building-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.building-card h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.building-address {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.building-rooms {
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
}

.building-status {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
}

.status-active {
    background: #d1fae5;
    color: #065f46;
}

.status-maintenance {
    background: #fef3c7;
    color: #92400e;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.page-header > div h1 {
    font-size: 36px;
    color: var(--dark);
    margin-bottom: 8px;
    font-weight: 700;
}

.page-header > div p {
    color: var(--secondary);
    font-size: 16px;
}

/* Room Card */
.room-card {
    padding: 24px;
}

.room-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.room-header h3 {
    font-size: 18px;
    color: var(--dark);
}

.room-capacity {
    background: var(--light);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
}

.room-building,
.room-floor {
    color: var(--secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.room-equipment {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
}

.equipment-tag {
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
    color: white;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Filter Tabs */
.filter-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.filter-btn {
    padding: 10px 20px;
    border: 2px solid var(--border);
    background: var(--input-bg);
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

/* Booking Card */
.booking-card {
    padding: 24px;
}

.booking-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 16px;
}

.booking-header h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.booking-status {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
}

.status-confirmed {
    background: #d1fae5;
    color: #065f46;
}

.status-cancelled {
    background: #fee2e2;
    color: #991b1b;
}

.status-completed {
    background: #e0e7ff;
    color: #3730a3;
}

.booking-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

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

.booking-description {
    grid-column: 1 / -1;
    padding: 12px;
    background: var(--light);
    border-radius: 8px;
    margin-top: 8px;
}

.booking-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
@media (max-width: 768px) {
    .auth-card {
        padding: 32px 24px;
    }

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

    .nav-menu {
        gap: 16px;
        font-size: 13px;
    }

    .nav-container {
        padding: 16px 20px;
    }

    .container {
        padding: 24px 20px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .grid {
        grid-template-columns: 1fr;
    }
}

/* Password Warning */
.password-warning {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--card-bg);
    padding: 32px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 2000;
    max-width: 500px;
    width: 90%;
    animation: fadeIn 0.3s ease;
}

.password-warning::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: -1;
}

/* Generate Password Button */
.btn-generate-password {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
    margin-top: 4px;
}

.btn-generate-password:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--light);
}

/* Admin Tabs */
.admin-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 2px solid var(--border);
    margin-bottom: 24px;
}

.admin-tab {
    padding: 12px 24px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.admin-tab:hover {
    color: var(--primary);
}

.admin-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

/* Date and Time inputs */
input[type="date"],
input[type="time"] {
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: var(--input-bg);
    cursor: pointer;
}

input[type="date"]:focus,
input[type="time"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}