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

:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --success-color: #27ae60;
    --success-light: #2ecc71;
    --danger-color: #e74c3c;
    --danger-dark: #c0392b;
    --warning-color: #f39c12;
    --warning-dark: #e67e22;
    --purple-color: #9b59b6;
    --purple-dark: #8e44ad;
    --dark-color: #2c3e50;
    --dark-light: #34495e;
    --gray-color: #7f8c8d;
    --light-gray: #ecf0f1;
    --white: #ffffff;
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 30px rgba(0, 0, 0, 0.2);
    --border-radius: 12px;
    --border-radius-large: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Typography and Layout */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background: linear-gradient(135deg, var(--dark-color) 0%, var(--dark-light) 100%);
    min-height: 100vh;
    font-size: 16px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem;
}

/* Header Styles */
.admin-header {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--border-radius-large);
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    box-shadow: var(--shadow-medium);
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
}

.admin-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color), var(--warning-color), var(--purple-color));
}

.admin-header h1 {
    color: var(--dark-color);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    font-weight: 700;
}

.admin-header .icon {
    font-size: 1.2em;
}

.admin-header p {
    color: var(--gray-color);
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    font-weight: 500;
}

/* Connection Status */
.connection-status {
    background: var(--light-gray);
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
    font-weight: 600;
    transition: var(--transition);
}

.connection-status.connected {
    border-color: var(--success-color);
    background: #d4edda;
    color: #155724;
}

.connection-status.error {
    border-color: var(--danger-color);
    background: #f8d7da;
    color: #721c24;
}

/* Statistics Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--danger-color), var(--danger-dark));
    color: var(--white);
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

.stat-card:hover::before {
    left: 100%;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.stat-card:nth-child(2) {
    background: linear-gradient(135deg, var(--success-color), var(--success-light));
}

.stat-card:nth-child(3) {
    background: linear-gradient(135deg, var(--warning-color), var(--warning-dark));
}

.stat-card:nth-child(4) {
    background: linear-gradient(135deg, var(--purple-color), var(--purple-dark));
}

.stat-number {
    font-size: clamp(2rem, 5vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-label {
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    opacity: 0.95;
    font-weight: 500;
}

/* Main Panel */
.admin-panel {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--border-radius-large);
    padding: clamp(1.5rem, 4vw, 3rem);
    box-shadow: var(--shadow-heavy);
    backdrop-filter: blur(20px);
}

/* Alert Styles */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    font-weight: 500;
    animation: slideInRight 0.3s ease-out;
    position: relative;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: var(--success-color);
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-color: var(--danger-color);
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: var(--warning-color);
}

/* Current Schedule Section */
.current-schedule {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
}

.current-schedule h2 {
    margin-bottom: 1.5rem;
    font-size: clamp(1.3rem, 3vw, 1.8rem);
    font-weight: 600;
}

.schedule-list {
    list-style: none;
}

.schedule-list li {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.25rem;
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.schedule-list li:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(8px);
}

.schedule-list li:last-child {
    margin-bottom: 0;
}

.loading-item {
    justify-content: center !important;
    opacity: 0.7;
}

.schedule-info {
    flex: 1;
}

.schedule-day {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.schedule-details {
    font-size: 0.9rem;
    opacity: 0.9;
    line-height: 1.4;
}

/* Form Styles */
.form-section {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary-color);
}

.form-section h2 {
    color: var(--dark-color);
    margin-bottom: 2rem;
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 600;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #495057;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    transition: var(--transition);
    background: var(--white);
    font-family: inherit;
}

.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(52, 152, 219, 0.1);
    transform: translateY(-2px);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Modern Time Input Styles */
.time-input-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.modern-time-input {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--white);
    border: 2px solid #e9ecef;
    border-radius: var(--border-radius);
    transition: var(--transition);
    overflow: hidden;
}

.modern-time-input:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
    transform: translateY(-2px);
}

.time-field {
    flex: 1;
    border: none;
    padding: 0.875rem 1rem;
    font-size: 0.9rem;
    background: transparent;
    outline: none;
    font-family: inherit;
}

.time-picker-toggle {
    padding: 0.5rem;
    border: none;
    background: transparent;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.time-picker-toggle:hover {
    color: var(--primary-color);
    background: rgba(52, 152, 219, 0.1);
}

.time-picker-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    border: 2px solid var(--primary-color);
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: var(--shadow-medium);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
}

.time-picker-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    animation: timePickerSlide 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.time-picker-content {
    padding: 1.5rem;
}

.time-range-selector {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

.time-part label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-color);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.time-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    background: #f8f9fa;
    border-radius: 8px;
    padding: 0.5rem;
}

.hour-select,
.minute-select,
.period-select {
    border: none;
    background: transparent;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--dark-color);
    cursor: pointer;
    outline: none;
    padding: 0.25rem;
}

.hour-select,
.minute-select {
    width: 3rem;
    text-align: center;
}

.period-select {
    width: 3.5rem;
    text-align: center;
}

.time-separator {
    font-weight: bold;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.time-divider {
    font-size: 0.8rem;
    color: var(--gray-color);
    font-weight: 500;
    text-align: center;
    padding: 0.5rem;
    background: #f8f9fa;
    border-radius: 20px;
    min-width: 2rem;
}

.quick-time-presets {
    border-top: 1px solid #e9ecef;
    padding-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.preset-btn {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border: 1px solid #dee2e6;
    border-radius: 20px;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
}

.preset-btn:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.time-format-toggle {
    position: absolute;
    top: -0.5rem;
    right: 0;
    display: flex;
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.format-toggle-btn {
    background: #f8f9fa;
    border: none;
    padding: 0.25rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.format-toggle-btn:first-child {
    border-radius: 15px 0 0 15px;
}

.format-toggle-btn:last-child {
    border-radius: 0 15px 15px 0;
}

/* Smart validation indicators */
.time-field.valid {
    border-right: 3px solid var(--success-color);
}

.time-field.invalid {
    border-right: 3px solid var(--danger-color);
}

/* Button Styles */
.btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--white);
    border: none;
    padding: 0.875rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), var(--success-light));
}

.btn-success:hover {
    box-shadow: 0 8px 25px rgba(46, 204, 113, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), var(--danger-dark));
}

.btn-danger:hover {
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), var(--warning-dark));
}

.btn-warning:hover {
    box-shadow: 0 8px 25px rgba(243, 156, 18, 0.4);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    border-radius: 25px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Actions Section */
.actions-section {
    background: linear-gradient(135deg, var(--purple-color), var(--purple-dark));
    color: var(--white);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
}

.actions-section h2 {
    margin-bottom: 1.5rem;
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 600;
}

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

.action-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.action-card:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.action-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.action-card h4 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.action-card p {
    font-size: 0.9rem;
    opacity: 0.9;
    line-height: 1.4;
}

/* Preview Section */
.preview-section {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-top: 2rem;
}

.preview-section h2 {
    color: var(--dark-color);
    margin-bottom: 1rem;
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 600;
}

.preview-description {
    margin-bottom: 1.5rem;
    color: var(--gray-color);
    font-style: italic;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.preview-card {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
}

.preview-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

.preview-card h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.preview-item {
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    opacity: 0.95;
    line-height: 1.4;
}

.preview-item:last-child {
    margin-bottom: 0;
}

/* Animations */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes timePickerSlide {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.admin-panel {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 0.75rem;
    }
    
    .admin-panel {
        padding: 2rem;
    }
    
    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0.5rem;
    }

    .admin-panel {
        padding: 1.5rem;
    }

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

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

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

    .admin-header h1 {
        flex-direction: column;
        gap: 0.5rem;
    }

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        justify-content: center;
    }

    .schedule-list li {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

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

    .time-range-selector {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .time-divider {
        order: 2;
        margin: 0.5rem 0;
    }
    
    .quick-time-presets {
        grid-template-columns: 1fr 1fr;
    }
    
    .preset-btn {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .admin-header {
        padding: 1.5rem;
    }

    .form-section,
    .actions-section,
    .current-schedule,
    .preview-section {
        padding: 1.5rem;
    }

    .stat-card {
        padding: 1.5rem 1rem;
    }

    .btn-text {
        display: none;
    }

    .btn {
        width: auto;
        min-width: 50px;
        justify-content: center;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0 !important;
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    .form-section {
        background: #2a2a2a;
        color: #ffffff;
    }
    
    .preview-section {
        background: #2a2a2a;
        color: #ffffff;
    }
    
    .form-group label {
        color: #cccccc;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        background: #333333;
        border-color: #555555;
        color: #ffffff;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn {
        border: 2px solid currentColor;
    }
    
    .stat-card,
    .preview-card,
    .action-card {
        border: 2px solid rgba(255, 255, 255, 0.3);
    }
}

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