/* Reddit Assignment System - Modern Dark Theme Styles */

/* CSS Variables for consistent theming */
:root {
    /* Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #404040;
    --bg-card: #2d2d2d;
    --bg-input: #404040;
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #6b7280;
    
    --accent-primary: #fbbf24;
    --accent-secondary: #f59e0b;
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

/* Links */
a {
    color: var(--info);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: #60a5fa;
    text-decoration: underline;
}

/* Code elements */
code {
    font-family: var(--font-mono);
    background-color: var(--bg-tertiary);
    color: var(--accent-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
}

/* Lists */
ul, ol {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

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

/* Container and layout */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.app-container {
    min-height: 100vh;
    padding: var(--spacing-xl) 0;
}

/* Section spacing */
section {
    margin-bottom: var(--spacing-2xl);
}

/* Header Styles */
.app-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.title {
    color: var(--accent-primary);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
}

/* Card Components */
.verification-card,
.step-card,
.token-section,
.timer-section,
.instructions-section,
.no-tasks-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid #374151;
}

.card-title {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

/* Form Elements */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-field {
    width: 100%;
    background: var(--bg-input);
    border: 2px solid #4b5563;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
    font-family: var(--font-family);
}

.input-field::placeholder {
    color: var(--text-muted);
}

.input-field:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: #4a4a4a;
    box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.1);
}

/* Button Styles */
.action-btn,
.copy-btn,
.open-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: var(--accent-primary);
    color: #1a1a1a;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.action-btn:hover,
.copy-btn:hover,
.open-btn:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.action-btn:active,
.copy-btn:active,
.open-btn:active {
    transform: translateY(0);
}

/* Button variants */
.verify-btn {
    width: 100%;
    font-size: 1.1rem;
    padding: var(--spacing-lg);
}

.copy-btn {
    background: var(--info);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.copy-btn:hover {
    background: #2563eb;
}

.open-btn {
    background: var(--success);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.open-btn:hover {
    background: #059669;
}

.submit-btn {
    background: var(--success);
    color: white;
}

.submit-btn:hover {
    background: #059669;
}

.help-btn {
    background: var(--text-secondary);
    color: white;
}

.help-btn:hover {
    background: #4b5563;
}

.retry-btn {
    background: var(--warning);
    color: #1a1a1a;
}

.retry-btn:hover {
    background: #d97706;
}

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

.btn-secondary:hover {
    background: #4b5563;
}

/* Button loading state */
.btn-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: opacity var(--transition-normal);
}

.btn-loader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(0,0,0,0.3);
    border-top: 2px solid #1a1a1a;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Success Banner */
.success-banner {
    background: linear-gradient(135deg, var(--success), #059669);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.success-title {
    color: white;
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.user-info {
    color: #d1fae5;
    font-size: 1.125rem;
    margin: 0;
}

/* Step Cards */
.step-header {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.step-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* URL Display */
.url-container {
    margin-bottom: var(--spacing-lg);
}

.url-display {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid #525252;
}

.thread-link {
    color: #60a5fa;
    font-family: var(--font-mono);
    word-break: break-all;
    display: block;
    font-size: 0.95rem;
    line-height: 1.5;
}

.thread-link:hover {
    color: #93c5fd;
}

.url-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Comment Display */
.comment-container {
    margin-bottom: var(--spacing-lg);
}

.comment-display {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid #525252;
    white-space: pre-wrap;
    line-height: 1.6;
    color: var(--text-primary);
    font-size: 1rem;
    min-height: 120px;
}

.copy-comment-btn {
    width: 100%;
    background: var(--info);
    color: white;
    font-size: 1.1rem;
}

.copy-comment-btn:hover {
    background: #2563eb;
}

/* Token Section */
.token-section {
    background: linear-gradient(135deg, var(--error), #991b1b);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.token-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(251, 191, 36, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.token-header {
    position: relative;
    z-index: 1;
}

.token-title {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.token-subtitle {
    color: #fecaca;
    font-size: 0.95rem;
    margin: 0 0 var(--spacing-lg) 0;
}

.token-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.token-value {
    color: white;
    font-size: 1.75rem;
    font-weight: bold;
    font-family: var(--font-mono);
    letter-spacing: 2px;
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.token-copy-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.token-copy-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.token-warning {
    color: #fecaca;
    font-size: 0.95rem;
    font-style: italic;
    margin: 0;
    position: relative;
    z-index: 1;
}

/* Timer Section */
.timer-section {
    background: linear-gradient(135deg, var(--warning), #d97706);
    text-align: center;
}

.timer-title {
    color: white;
    margin-bottom: var(--spacing-md);
}

.countdown-value {
    color: white;
    font-size: 2.5rem;
    font-weight: bold;
    font-family: var(--font-mono);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    display: block;
}

/* Instructions Section */
.instructions-title {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-lg);
}

.instructions-list {
    color: var(--text-secondary);
    padding-left: var(--spacing-xl);
}

.instructions-list li {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.instructions-list strong {
    color: var(--text-primary);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

.action-buttons .action-btn {
    flex: 1;
    font-size: 1.1rem;
    padding: var(--spacing-lg);
}

/* Requirements Card */
.requirements-card {
    background: #374151;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.requirements-title {
    color: var(--accent-primary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.requirements-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.requirements-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.req-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

/* Format Info */
.format-info {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-secondary);
    line-height: 1.6;
}

.format-examples {
    display: block;
    margin-top: var(--spacing-sm);
}

/* Stats Display */
.stats-display {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat-item {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-right: var(--spacing-sm);
}

.stat-value {
    color: var(--accent-primary);
    font-weight: 600;
}

/* No Tasks Section */
.no-tasks-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.no-tasks-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
}

.no-tasks-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.no-tasks-message {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
}

.suggestions {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

.suggestions h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.suggestions ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.suggestions li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 26, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.loading-content {
    text-align: center;
    color: var(--text-primary);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(251, 191, 36, 0.3);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg) auto;
}

.loading-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 0;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 1;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid #374151;
}

.modal-header {
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 2px solid var(--error);
}

.modal-header h3 {
    margin: 0;
    color: var(--error);
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.close-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: 0 var(--spacing-lg) var(--spacing-md);
}

.modal-footer {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.error-message {
    color: var(--text-primary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.error-details {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.error-details p {
    margin: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

/* Copy Success Feedback */
.copy-success {
    background: var(--success) !important;
    color: white !important;
}

/* Animations */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.assignment-section {
    animation: slideInUp 0.5s ease-out;
}

.success-banner {
    animation: slideInUp 0.3s ease-out;
}

.step-card {
    animation: slideInUp 0.4s ease-out;
}

.step-card:nth-child(2) {
    animation-delay: 0.1s;
}

.token-section {
    animation: slideInUp 0.5s ease-out;
    animation-delay: 0.2s;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .title {
        font-size: 1.25rem;
        line-height: 1.4;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .stats-display {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: center;
    }
    
    .stat-item {
        text-align: center;
        min-width: 200px;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .url-actions {
        flex-direction: column;
    }
    
    .token-display {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .token-value {
        font-size: 1.5rem;
        letter-spacing: 1px;
    }
    
    .countdown-value {
        font-size: 2rem;
    }
    
    .modal {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .app-container {
        padding: var(--spacing-lg) 0;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .title {
        font-size: 1.125rem;
    }
    
    .verification-card,
    .step-card,
    .token-section,
    .timer-section,
    .instructions-section,
    .no-tasks-content {
        padding: var(--spacing-lg);
    }
    
    .verify-btn {
        padding: var(--spacing-md);
        font-size: 1rem;
    }
    
    .token-value {
        font-size: 1.25rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .countdown-value {
        font-size: 1.75rem;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .spinner,
    .btn-spinner {
        animation: none;
    }
}