/* Shared styles for all text tools - reduces duplication */

:root {
    /* Color theme using CSS custom properties */
    --color-primary: #1e4471;
    --color-primary-dark: #2c5f8d;
    --color-primary-light: #b8d4f1;
    --color-secondary: #6c757d;
    --color-secondary-dark: #5a6268;
    --color-success: #28a745;
    --color-success-dark: #218838;
    --color-error: #c62828;
    --color-error-bg: #ffebee;
    --color-success-bg: #d4edda;
    --color-success-text: #155724;

    --color-bg: #f4f4f4;
    --color-text: #333;
    --color-text-light: #555;
    --color-text-lighter: #666;
    --color-text-hint: #888;
    --color-border: #bbb;
    --color-border-light: #e0e0e0;

    --spacing-xs: 8px;
    --spacing-sm: 10px;
    --spacing-md: 15px;
    --spacing-lg: 20px;
    --spacing-xl: 25px;

    --font-size-xs: 12px;
    --font-size-sm: 13px;
    --font-size-base: 14px;
    --font-size-md: 15px;
    --font-size-lg: 18px;
    --font-size-xl: 22px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 3px 8px rgba(0,0,0,0.15);

    --radius: 2px;
    --min-tap-target: 44px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.header h1 {
    font-size: var(--font-size-xl);
    font-weight: 500;
    margin: 0;
}

.header .subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-primary-light);
    margin-top: 3px;
}

.container {
    max-width: 900px;
    margin: var(--spacing-lg) auto;
    padding: 0 var(--spacing-lg);
    flex: 1;
    width: 100%;
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--color-primary-dark);
    text-decoration: none;
    font-size: var(--font-size-base);
}

.nav-links a:hover,
.nav-links a:focus {
    text-decoration: underline;
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.editor-section {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.label {
    display: block;
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

textarea {
    width: 100%;
    padding: 12px;
    font-size: var(--font-size-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-family: inherit;
    resize: vertical;
    line-height: 1.6;
    min-height: 150px;
    word-wrap: break-word;
    white-space: pre-wrap;
    transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(30, 68, 113, 0.1);
}

textarea:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
}

#output-text {
    background-color: var(--color-bg);
}

.stats {
    font-size: var(--font-size-xs);
    color: var(--color-text-lighter);
    margin-top: var(--spacing-xs);
}

.button-row {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: 12px;
    flex-wrap: wrap;
}

button {
    background-color: var(--color-primary-dark);
    color: white;
    padding: var(--spacing-sm) 24px;
    font-size: var(--font-size-base);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 500;
    min-height: var(--min-tap-target);
    transition: background-color 0.2s, transform 0.1s;
}

button:hover:not(:disabled) {
    background-color: var(--color-primary);
}

button:active:not(:disabled) {
    transform: translateY(1px);
}

button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

button:disabled {
    background-color: #999;
    cursor: not-allowed;
}

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

.secondary-btn:hover:not(:disabled) {
    background-color: var(--color-secondary-dark);
}

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

.success-btn:hover:not(:disabled) {
    background-color: var(--color-success-dark);
}

.hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-hint);
    margin-top: var(--spacing-xs);
    font-style: italic;
}

.message {
    padding: var(--spacing-sm) 12px;
    border-radius: var(--radius);
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-base);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

.footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: #777;
    font-size: var(--font-size-xs);
    border-top: 1px solid var(--color-border-light);
    margin-top: auto;
}

.footer a {
    color: var(--color-primary-dark);
    text-decoration: none;
}

.footer a:hover,
.footer a:focus {
    text-decoration: underline;
}

.loading-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-right: var(--spacing-xs);
    vertical-align: middle;
}

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

/* Feedback section for detailed review */
.feedback-section {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
    display: none;
}

.feedback-section.show {
    display: block;
}

.feedback-content {
    font-size: var(--font-size-md);
    line-height: 1.8;
    color: var(--color-text);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.feedback-content strong {
    color: var(--color-primary);
}

/* Tab navigation */
.tabs {
  background-color: #fff;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}

.tabs ul {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.tabs li a {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-text-light);
  text-decoration: none;
  font-size: var(--font-size-base);
  border-bottom: 3px solid transparent;
  transition: color 0.2s, border-bottom-color 0.2s;
}

.tabs li a:hover {
  color: var(--color-primary);
}

.tabs li a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: 500;
}

/* Mobile optimization */
@media (max-width: 768px) {
    .header h1 {
        font-size: var(--font-size-lg);
    }

    .header .subtitle {
        font-size: var(--font-size-xs);
    }

    .container {
        margin: var(--spacing-md) auto;
        padding: 0 var(--spacing-md);
    }

    .editor-section,
    .feedback-section {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    textarea {
        font-size: 16px; /* Prevents zoom on iOS */
        min-height: 120px;
    }

    button {
        padding: 12px var(--spacing-lg);
        font-size: var(--font-size-md);
        width: 100%;
    }

    .button-row {
        flex-direction: column;
    }

    .nav-links {
        font-size: var(--font-size-sm);
    }

    .feedback-content {
        font-size: var(--font-size-base);
    }
}

/* Touch-friendly tap targets */
@media (pointer: coarse) {
    button {
        min-height: 48px;
        padding: 14px 28px;
    }
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    button {
        border: 2px solid currentColor;
    }

    textarea:focus {
        outline: 3px solid var(--color-primary);
    }
}

/* Dark mode support (future enhancement) */
@media (prefers-color-scheme: dark) {
    /* Could add dark mode variables here */
}

/* Print styles */
@media print {
    .header,
    .nav-links,
    .button-row,
    .footer {
        display: none;
    }

    body {
        background: white;
    }

    .editor-section {
        box-shadow: none;
        border: 1px solid #000;
    }
}