:root {
    --bg-color: #f5f5f5;
    --text-color: #333;
    --item-bg: #ffffff;
    --border-color: #dddddd;
    --highlight-color: #4CAF50;
    --highlight-hover: #45a049;
    --container-shadow: 0 4px 6px rgba(0,0,0,0.1);
    --heading-color: #2c3e50;
    --secondary-text: #666;
    --input-border: #ddd;
    --input-focus: #4CAF50;
    --shabbat-bg: #fff3e0;
    --shabbat-border: #ff9800;
    --holiday-bg: #e8f5e9;
    --holiday-border: #4CAF50;
    --error-bg: #ffebee;
    --error-text: #d32f2f;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
        --item-bg: #2d2d2d;
        --border-color: #404040;
        --highlight-color: #4CAF50;
        --highlight-hover: #45a049;
        --container-shadow: 0 4px 6px rgba(0,0,0,0.3);
        --heading-color: #ffffff;
        --secondary-text: #b0b0b0;
        --input-border: #555;
        --input-focus: #6abf6e;
        --shabbat-bg: #3d2815;
        --shabbat-border: #ff9800;
        --holiday-bg: #1b3320;
        --holiday-border: #4CAF50;
        --error-bg: #3d1f1f;
        --error-text: #ff8a8a;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    background-color: var(--item-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--container-shadow);
}

h1, h2, h3 {
    color: var(--heading-color);
    text-align: center;
    margin-bottom: 30px;
}

.input-group {
    margin: 15px 0;
    text-align: center;
}

input {
    padding: 12px;
    border: 2px solid var(--input-border);
    border-radius: 6px;
    width: 200px;
    font-size: 16px;
    transition: border-color 0.3s ease;
    background-color: var(--item-bg);
    color: var(--text-color);
}

input:focus {
    border-color: var(--input-focus);
    outline: none;
}

button {
    padding: 12px 24px;
    margin: 10px;
    background-color: var(--highlight-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

button:hover {
    background-color: var(--highlight-hover);
    transform: translateY(-1px);
}

#result, #zmanim, #shabbat {
    margin-top: 25px;
    padding: 20px;
    border-radius: 8px;
    background-color: var(--item-bg);
    box-shadow: var(--container-shadow);
}

.hebrew-date {
    font-size: 1.6em;
    color: var(--heading-color);
    margin: 15px 0;
    text-align: center;
    font-weight: 500;
}

.coordinates {
    color: var(--secondary-text);
    font-size: 0.9em;
    text-align: center;
    margin-top: 10px;
}

.zmanim-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.zman-item {
    padding: 15px;
    background-color: var(--item-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: transform 0.2s ease;
}

.zman-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--container-shadow);
}

.shabbat-times {
    margin-top: 20px;
    padding: 20px;
    background-color: var(--shabbat-bg);
    border-radius: 8px;
    border-left: 4px solid var(--shabbat-border);
}

.loading {
    color: var(--secondary-text);
    font-style: italic;
    text-align: center;
    padding: 20px;
}

.next-holiday {
    margin-top: 20px;
    padding: 20px;
    background-color: var(--holiday-bg);
    border-radius: 8px;
    border-left: 4px solid var(--holiday-border);
    text-align: center;
}

.holiday-info {
    margin-top: 10px;
    line-height: 1.5;
    font-size: 1.1em;
}

.error {
    color: var(--error-text);
    text-align: center;
    padding: 10px;
    background-color: var(--error-bg);
    border-radius: 4px;
    margin-top: 10px;
}

/* Calendar Subscription Styles */
.subscription-guide {
    margin-top: 40px;
    padding: 20px;
    background-color: var(--item-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.subscription-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--item-bg);
    color: var(--text-color);
}

.tab-button.active {
    background-color: var(--highlight-color);
    color: white;
}

.tab-content {
    padding: 20px;
    background-color: var(--bg-color);
    border-radius: 4px;
    text-align: left;
}

.tab-content.hidden {
    display: none;
}

.calendar-subscription-item {
    padding: 15px;
    margin: 10px 0;
    background-color: var(--item-bg);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.calendar-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.calendar-url {
    flex-grow: 1;
    padding: 8px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--item-bg);
    color: var(--text-color);
    min-width: 200px;
}

.copy-button,
.subscribe-button {
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    min-width: 120px;
}

.copy-button {
    background-color: var(--item-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.subscribe-button {
    background-color: var(--highlight-color);
    color: white;
    border: none;
}

.calendar-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

/* Loading States */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--highlight-color);
    animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 600px) {
    .container {
        padding: 15px;
    }

    input {
        width: 150px;
    }

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

    .calendar-actions {
        flex-direction: column;
    }

    .calendar-url,
    .copy-button,
    .subscribe-button {
        width: 100%;
    }

    .input-group {
        flex-direction: column;
    }
}