/* FlashPaper - Zero-knowledge encrypted pastebin
 * Styles for the web interface
 * Supports light mode (default) and dark mode via toggle
 */

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

:root {
    /* Light theme (default) */
    --bg-primary: #f5f7fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #6c757d;
    --accent-primary: #e94560;
    --accent-secondary: #0f3460;
    --border-color: #dee2e6;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    --shadow: rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
}

/* Dark theme - greyscale palette */
[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2d2d2d;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --accent-primary: #808080;
    --accent-secondary: #505050;
    --border-color: #3d3d3d;
    --shadow: rgba(0, 0, 0, 0.4);
}

html {
    font-size: 16px;
    line-height: 1.5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Container */
.container {
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

header h1 a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

header h1 a:hover {
    color: var(--text-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.tagline {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* Small button variant */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8125rem;
}

.theme-toggle-icon {
    font-size: 1rem;
    line-height: 1;
}

/* Hide text on small screens, show only icon */
@media (max-width: 480px) {
    .theme-toggle-text {
        display: none;
    }
}

/* Main content */
main {
    flex: 1;
}

/* Panel (card-like container) */
.panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 4px var(--shadow);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

/* Toolbar */
.toolbar {
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-md);
}

.toolbar-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-md);
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.toolbar-group > label {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    white-space: nowrap;
}

/* Checkbox label styling */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    white-space: nowrap;
}

.checkbox-label input[type="checkbox"] {
    margin: 0;
}

/* Toolbar password group */
.toolbar-password {
    margin-left: auto;
}

.toolbar-password input {
    width: 120px;
}

/* Toolbar send button */
.toolbar-send {
    margin-left: var(--spacing-sm);
}

/* Paste meta info in toolbar */
.paste-meta {
    color: var(--text-secondary);
    font-size: 0.8125rem;
    gap: var(--spacing-md);
}

/* Toolbar actions (right-aligned) */
.toolbar-actions {
    margin-left: auto;
    gap: var(--spacing-xs);
}

/* Form elements */
select, input[type="text"], input[type="password"] {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8125rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-normal);
}

select:focus, input[type="text"]:focus, input[type="password"]:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(233, 69, 96, 0.25);
}

input[type="checkbox"] {
    width: 0.875rem;
    height: 0.875rem;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

/* Password form (for decryption prompt) */
.password-form {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.password-form input {
    width: 200px;
}

/* Textarea */
textarea {
    width: 100%;
    min-height: 300px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: var(--spacing-md);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    resize: vertical;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-normal);
}

textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(233, 69, 96, 0.25);
}

textarea::placeholder {
    color: var(--text-muted);
}

/* Actions bar (legacy, kept for compatibility) */
.actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* Hide empty actions bar */
.actions:empty {
    display: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:hover {
    background-color: var(--border-color);
    border-color: var(--text-muted);
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(233, 69, 96, 0.25);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background-color: #d63050;
    border-color: #d63050;
}

.btn-danger {
    background-color: var(--danger);
    border-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
    border-color: #c82333;
}

.btn-warning {
    background-color: var(--warning);
    border-color: var(--warning);
    color: #212529;
}

.btn-warning:hover {
    background-color: #e0a800;
    border-color: #e0a800;
}

/* Alert messages */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    border: 1px solid;
}

.alert-success {
    background-color: rgba(40, 167, 69, 0.15);
    border-color: var(--success);
    color: var(--success);
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.15);
    border-color: var(--warning);
    color: var(--warning);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.15);
    border-color: var(--danger);
    color: var(--danger);
}

.alert-info {
    background-color: rgba(23, 162, 184, 0.15);
    border-color: var(--info);
    color: var(--info);
}

/* Hidden elements */
.hidden {
    display: none !important;
}

/* Paste info */
.paste-info {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Paste output */
#paste-output {
    margin-bottom: var(--spacing-md);
}

#paste-text {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 500px;
    overflow-y: auto;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

/* Password prompt */
#password-prompt {
    text-align: center;
    padding: var(--spacing-xl);
}

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

#password-prompt input {
    margin-right: var(--spacing-sm);
    width: 200px;
}

/* Burn warning */
#burn-warning {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* Discussion section */
#discussion {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

#discussion h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-size: 1.25rem;
}

#comments {
    margin-bottom: var(--spacing-lg);
}

.comment {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.comment-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.comment-vizhash {
    width: 16px;
    height: 16px;
    border-radius: 2px;
}

.comment-content {
    font-size: 0.875rem;
    line-height: 1.5;
}

.comment-reply {
    margin-left: var(--spacing-xl);
}

#new-comment textarea {
    min-height: 100px;
    margin-bottom: var(--spacing-sm);
}

/* Footer */
footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-color);
    margin-top: var(--spacing-xl);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

footer a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.security-note {
    margin-top: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Loading spinner */
.loading {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--text-muted);
    border-radius: 50%;
    border-top-color: var(--accent-primary);
    animation: spin 0.8s linear infinite;
}

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

/* URL display */
.url-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.url-display input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: monospace;
    font-size: 0.875rem;
}

.url-display input:focus {
    outline: none;
    box-shadow: none;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    header {
        padding: var(--spacing-md) 0;
    }

    header h1 {
        font-size: 1.25rem;
    }

    .tagline {
        font-size: 0.75rem;
    }

    .toolbar-row {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }

    .toolbar-group {
        justify-content: space-between;
    }

    .toolbar-password {
        margin-left: 0;
    }

    .toolbar-password input {
        flex: 1;
    }

    .toolbar-send {
        margin-left: 0;
    }

    .toolbar-send .btn {
        width: 100%;
    }

    .toolbar-actions {
        margin-left: 0;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .paste-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    textarea {
        min-height: 200px;
    }

    #burn-warning {
        flex-direction: column;
        text-align: center;
    }
}

/* Print styles */
@media print {
    body {
        background-color: white;
        color: black;
    }

    header, footer, .toolbar, .actions, #new-comment, .theme-toggle {
        display: none;
    }

    .panel {
        border: none;
        padding: 0;
        box-shadow: none;
    }

    #paste-text {
        background-color: white;
        border: 1px solid #ccc;
    }
}

/* Selection styles */
::selection {
    background-color: var(--accent-primary);
    color: white;
}

/* Scrollbar styles */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus visible for accessibility */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background-color: var(--accent-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}