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

/* CSS Variables for Light Theme */
:root {
    --bg-color: #f5f5f5;
    --text-color: #333;
    --card-bg: white;
    --border-color: #e9ecef;
    --input-border: #ddd;
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --secondary-color: #28a745;
    --secondary-hover: #218838;
    --info-color: #17a2b8;
    --error-bg: #f8d7da;
    --error-color: #721c24;
    --error-border: #dc3545;
    --muted-color: #6c757d;
    --shadow: rgba(0,0,0,0.1);
    --file-hover-bg: #e9ecef;
    --file-bg: #f8f9fa;
}

/* Dark Theme Variables */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
        --card-bg: #2d2d2d;
        --border-color: #404040;
        --input-border: #555;
        --primary-color: #4dabf7;
        --primary-hover: #339af0;
        --secondary-color: #51cf66;
        --secondary-hover: #40c057;
        --info-color: #22d3ee;
        --error-bg: #4a1e1e;
        --error-color: #fca5a5;
        --error-border: #dc2626;
        --muted-color: #9ca3af;
        --shadow: rgba(0,0,0,0.3);
        --file-hover-bg: #404040;
        --file-bg: #383838;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Main Content */
.main-content {
    min-height: 100vh;
    padding: 2rem 0;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.container > h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-color);
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.page-header h1 {
    margin: 0;
    color: var(--text-color);
}

.page-nav {
    display: flex;
    gap: 1rem;
}

.nav-button {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
    font-size: 0.9rem;
}

.nav-button:hover {
    background-color: var(--primary-hover);
}

/* Cards and Forms */
.token-form {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px var(--shadow);
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary-color);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.3s;
    background-color: var(--card-bg);
    color: var(--text-color);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0,123,255,0.25);
}

/* Buttons */
button, .btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    margin-right: 0.5rem;
}

button, .btn-primary {
    background-color: var(--primary-color);
    color: white;
}

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

.refresh-btn, .btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.refresh-btn:hover, .btn-secondary:hover {
    background-color: var(--secondary-hover);
}

/* SMS List */
.sms-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sms-item {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid var(--info-color);
}

.sms-item.recent {
    border-left: 4px solid #ff8c00;
    box-shadow: 0 2px 8px rgba(255, 140, 0, 0.3);
}

.sms-sender {
    font-weight: 600;
    color: var(--info-color);
    margin-bottom: 0.5rem;
}

.sms-message {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    word-wrap: break-word;
}

.sms-timestamp, .sms-username {
    color: var(--muted-color);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

/* Folders and Files */
.folder {
    background-color: var(--card-bg);
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow);
    border-left: 4px solid var(--primary-color);
}

.folder-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-left: 1rem;
}

.file-item {
    display: block;
    padding: 0.75rem 1rem;
    background-color: var(--file-bg);
    border-radius: 4px;
    text-decoration: none;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.file-item:hover {
    background-color: var(--file-hover-bg);
    transform: translateX(5px);
}

.empty-folder {
    color: var(--muted-color);
    font-style: italic;
    margin-left: 1rem;
}

/* Status Messages */
.error {
    background-color: var(--error-bg);
    color: var(--error-color);
    padding: 1rem;
    border-radius: 4px;
    margin: 1rem 0;
    border-left: 4px solid var(--error-border);
}

.loading {
    text-align: center;
    color: var(--muted-color);
    font-style: italic;
    padding: 2rem;
}

.no-data {
    text-align: center;
    color: var(--muted-color);
    font-style: italic;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow);
}

/* Error Page */
.error-page {
    text-align: center;
    padding: 3rem;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 10px var(--shadow);
}

.error-page h1 {
    color: var(--error-border);
    margin-bottom: 1rem;
}

.error-message {
    color: var(--error-color);
    background-color: var(--error-bg);
    padding: 1rem;
    border-radius: 4px;
    margin: 1rem 0;
}

.error-actions {
    margin-top: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .token-form {
        padding: 1rem;
    }
    
    .file-list {
        margin-left: 0;
    }
}

/* Dark mode button text override */
@media (prefers-color-scheme: dark) {
    button, .btn-primary, .refresh-btn, .btn-secondary, .nav-button {
        color: black !important;
    }
    
    button:hover, .btn-primary:hover, .refresh-btn:hover, .btn-secondary:hover, .nav-button:hover {
        color: black !important;
    }
}