/* CSS Variables for Themes */
:root {
    /* Light Theme (default) */
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --header-bg: #2c3e50;
    --text-color: #333333;
    --text-light: #7f8c8d;
    --text-on-dark: #ffffff;
    --border-color: #dce0e6;
    --input-bg: #f5f7fa;
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --success-color: #2ecc71;
    --success-dark: #27ae60;
    --warning-color: #f39c12;
    --warning-dark: #e67e22;
    --error-color: #e74c3c;
    --error-dark: #c0392b;
    --success-bg: #e8f7ef;
    --error-bg: #fbeae9;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --modal-overlay: rgba(0, 0, 0, 0.7);
    --group-header-bg: #34495e;
    --check-in-item: #e8f7ef;
    --check-in-hover: #d5f2e3;
    --item-border: #ecf0f1;
    --item-hover: #f8f9fa;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-color: #1a1a2e;
    --card-bg: #16213e;
    --header-bg: #0f3460;
    --text-color: #e0e0e0;
    --text-light: #a0a0a0;
    --text-on-dark: #ffffff;
    --border-color: #2c3e50;
    --input-bg: #0f3460;
    --primary-color: #4a9edb;
    --primary-dark: #3a8edb;
    --success-color: #2ecc71;
    --success-dark: #27ae60;
    --warning-color: #f39c12;
    --warning-dark: #e67e22;
    --error-color: #e74c3c;
    --error-dark: #c0392b;
    --success-bg: #1c3b2b;
    --error-bg: #3b1c1c;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --modal-overlay: rgba(0, 0, 0, 0.8);
    --group-header-bg: #0f3460;
    --check-in-item: #1c3b2b;
    --check-in-hover: #183324;
    --item-border: #1e2a39;
    --item-hover: #1e293b;
}

/* Base styles */
body {
    font-family: 'Roboto', 'Segoe UI', Arial, sans-serif;
    background-color: var(--bg-color);
    padding: 0;
    margin: 0;
    color: var(--text-color);
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 10px var(--shadow-color);
    z-index: 1000;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.theme-toggle:hover {
    background-color: var(--primary-color);
    color: var(--text-on-dark);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
}

/* Header styles */
.header {
    background-color: var(--header-bg);
    color: var(--text-on-dark);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: background-color 0.3s ease;
}

h1 {
    margin: 0;
    font-size: 1.6rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.header-buttons {
    display: flex;
    gap: 10px;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    border-radius: 4px;
    font-weight: 500;
    transition: all 0.2s ease;
    text-transform: uppercase;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-on-dark);
}

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

.btn-success {
    background-color: var(--success-color);
    color: var(--text-on-dark);
}

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

.btn-warning {
    background-color: var(--warning-color);
    color: var(--text-on-dark);
}

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

/* API input container */
.api-input-container {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: background-color 0.3s ease;
}

.api-input-container h3 {
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.2rem;
    color: var(--text-color);
}

.api-input-wrapper {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.api-prefix {
    font-family: monospace;
    background-color: var(--input-bg);
    padding: 10px 12px;
    border-radius: 4px 0 0 4px;
    border: 1px solid var(--border-color);
    border-right: none;
    color: var(--text-light);
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.api-input-container input {
    flex: 1;
    min-width: 100px;
    padding: 10px 12px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 0 4px 4px 0;
    outline: none;
    background-color: var(--card-bg);
    color: var(--text-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.api-input-container input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* Status message */
.status-message {
    margin-top: 15px;
    padding: 12px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.status-success {
    background-color: var(--success-bg);
    color: var(--success-color);
    border-left: 4px solid var(--success-color);
}

.status-error {
    background-color: var(--error-bg);
    color: var(--error-color);
    border-left: 4px solid var(--error-color);
}

/* Counter */
.counter {
    background-color: var(--card-bg);
    padding: 15px 20px;
    border-radius: 8px;
    margin: 20px 0;
    font-size: 1.1rem;
    box-shadow: 0 2px 10px var(--shadow-color);
    display: flex;
    align-items: center;
    transition: background-color 0.3s ease;
}

.counter-numbers {
    font-weight: 700;
    color: var(--primary-color);
}

/* Search bar */
.search-bar {
    position: sticky;
    top: 70px;
    z-index: 100;
    background-color: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: background-color 0.3s ease;
}

.search-bar input {
    width: 80%;
    padding: 12px 15px;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-color);
    outline: none;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.search-bar input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
    background-color: var(--card-bg);
}

/* Group list */
.group-list {
    margin-bottom: 30px;
}

.group-item {
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px var(--shadow-color);
    transition: box-shadow 0.3s ease;
}

.group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--group-header-bg);
    color: var(--text-on-dark);
    padding: 10px 15px;
    transition: background-color 0.3s ease;
}

.group-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 500;
}

.group-header label {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    cursor: pointer;
}

.group-header input[type="checkbox"] {
    margin-right: 6px;
    cursor: pointer;
}

.group-item ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    background-color: var(--card-bg);
    transition: background-color 0.3s ease;
}

.group-item li {
    padding: 12px 15px;
    border-bottom: 1px solid var(--item-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.2s ease, border-color 0.3s ease;
}

.group-item li:last-child {
    border-bottom: none;
}

.group-item li:hover {
    background-color: var(--item-hover);
}

.group-item li.checked-in {
    background-color: var(--check-in-item);
}

.group-item li.checked-in:hover {
    background-color: var(--check-in-hover);
}

.group-item label {
    display: flex;
    align-items: center;
    width: 100%;
    cursor: pointer;
    color: var(--text-color);
}

.group-item input[type="checkbox"] {
    margin-right: 10px;
    cursor: pointer;
    width: 18px;
    height: 18px;
}

/* Custom checkbox styling */
input[type="checkbox"] {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--text-light);
    border-radius: 3px;
    outline: none;
    transition: all 0.2s ease;
    position: relative;
    cursor: pointer;
    vertical-align: middle;
    background-color: var(--card-bg);
}

input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

input[type="checkbox"]:checked::after {
    content: "";
    position: absolute;
    width: 5px;
    height: 10px;
    border: solid var(--text-on-dark);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    top: 1px;
    left: 5px;
}

/* QR Code Modal */
.qr-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-overlay);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.qr-modal-content {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: 8px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    position: relative;
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.close-modal {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
}

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

#qrcode {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.qr-modal-content input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin: 10px 0;
    font-size: 12px;
    background-color: var(--input-bg);
    color: var(--text-color);
}

.btn-qr {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    color: var(--primary-color);
}

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

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

/* Responsive adjustments */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
        padding: 12px 16px;
    }

    .header-buttons {
        margin-top: 10px;
        width: 100%;
        justify-content: space-between;
    }

    h1 {
        font-size: 1rem;
    }

    .api-prefix {
        max-width: 100%;
        border-radius: 4px;
        border-right: 1px solid var(--border-color);
        margin-bottom: 5px;
        width: 100%;
        box-sizing: border-box;
    }

    .api-input-container input {
        border-radius: 4px;
        width: 100%;
        box-sizing: border-box;
    }

    .search-bar {
        top: 112px;
    }

    .theme-toggle {
        bottom: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
}