:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

header {
    margin-bottom: 32px;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    flex-wrap: wrap;
    gap: 16px;
}

.title-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.icon-main {
    color: var(--primary-color);
    width: 32px;
    height: 32px;
}

h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 15px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.lang-dropdown {
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    font-size: 14px;
    cursor: pointer;
    outline: none;
}

.mode-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
}

/* Switch styling */
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #cbd5e1;
    transition: .4s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

/* Planner Controls */
.planner-controls {
    background: var(--card-bg);
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

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

.slider-label {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-muted);
}

.slider-time-group {
    text-align: right;
}

.slider-date {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
}

#slider-time-display {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -1px;
}

.main-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: #e2e8f0;
    outline: none;
    margin-bottom: 12px;
}

.main-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 4px solid white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: var(--transition);
}

.main-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.slider-ticks {
    display: flex;
    justify-content: space-between;
    padding: 0 4px;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 500;
}

/* Search */
.city-management {
    margin-bottom: 24px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

#city-search {
    width: 100%;
    padding: 14px 16px 14px 48px;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    background: var(--card-bg);
    font-size: 16px;
    transition: var(--transition);
    outline: none;
}

#city-search:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.search-icon {
    position: absolute;
    left: 16px;
    color: var(--text-muted);
    width: 20px;
    height: 20px;
}

.search-results {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    z-index: 100;
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}

.search-results.hidden {
    display: none;
}

.search-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.1s;
    font-size: 14px;
}

.search-item:hover {
    background-color: var(--bg-color);
}

.search-item:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

/* City List */
.city-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 40px;
}

.btn-remove {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    color: var(--text-muted);
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove:hover {
    background-color: #fee2e2;
    color: #ef4444;
}

.remove-icon {
    width: 18px;
    height: 18px;
}

.city-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    border: 1px solid transparent;
}

.city-card:hover {
    border-color: var(--border-color);
}

.city-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.city-name {
    font-size: 18px;
    font-weight: 600;
}

.city-date {
    font-size: 13px;
    color: var(--text-muted);
}

.time-info {
    text-align: right;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

.city-time {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge.working {
    background-color: #dcfce7;
    color: #166534;
}

.badge.off-hours {
    background-color: #f3f4f6;
    color: #4b5563;
}

/* Site Content Sections */
.site-content {
    margin-top: 60px;
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
}

.content-card, .info-box, .educational-article {
    background: var(--card-bg);
    padding: 24px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.content-card h2, .educational-article h2 {
    color: var(--text-color);
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

.styled-list {
    padding-left: 20px;
    line-height: 1.8;
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-q {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.faq-a {
    font-size: 0.95rem;
    color: var(--text-muted);
}

.educational-article {
    line-height: 1.7;
}

.educational-article p {
    margin-bottom: 16px;
}

/* Footer Styles */
footer {
    margin-top: 60px;
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

footer p {
    font-size: 13px;
}

/* Responsive */
@media (max-width: 600px) {
    .container {
        margin: 20px auto;
    }
    
    .city-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .time-info {
        text-align: left;
        align-items: flex-start;
        width: 100%;
        border-top: 1px solid var(--border-color);
        padding-top: 16px;
    }
}