/* =============================================================================
   TIẾNG VIỆT KHÔNG DẤU - Premium Design System
   Apple-inspired, modern aesthetics with Inter font
   Version: 2.2.0 - Redesigned Options Panel
   ============================================================================= */

/* =========================================================================
   1. CSS RESET & BASE
   ========================================================================= */
/* =========================================================================
   1. CSS RESET & BASE
   ========================================================================= */
:root {
    /* Light Mode (Default) */
    --bg-page: #f5f5f7;
    --bg-card: #ffffff;
    --bg-input: #f5f5f7;
    --text-primary: #1d1d1f;
    --text-secondary: #4b5563;
    --text-tertiary: #5a5f73;
    --accent: #1d1d1f;
    --accent-hover: #000000;
    --border: #e5e5e5;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    --link-hover-bg: #f9f9fb;
}

[data-theme="dark"] {
    /* Dark Mode */
    --bg-page: #1d1d1f;
    --bg-card: #2c2c2e;
    --bg-input: #1c1c1e;
    --text-primary: #f5f5f7;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --accent: #ffffff;
    --accent-hover: #e5e5e5;
    --border: #3a3a3c;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-hover: rgba(0, 0, 0, 0.4);
    --link-hover-bg: #3a3a3c;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display',
        'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* =========================================================================
   2. ANIMATIONS
   ========================================================================= */
@keyframes fadeIn {
    0% {
        opacity: 0.01;
        transform: translateY(20px);
    }

    1% {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

.copied {
    animation: pulse 0.3s ease;
}

/* =========================================================================
   3. LAYOUT - Container
   ========================================================================= */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 30px 20px;
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================================================
   4. NAVIGATION - Back Link
   ========================================================================= */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    background: var(--bg-card);
    border-radius: 980px;
    box-shadow: 0 2px 8px var(--shadow);
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 24px;
}

.back-link:hover {
    background: var(--accent);
    color: var(--bg-card);
}

/* =========================================================================
   4.1 NAVIGATION ROW
   ========================================================================= */
.nav-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
}

/* Bookmark Wrapper */
.bookmark-wrapper {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 4px;
}

.bookmark-arrow {
    animation: bounce-arrow 1.5s ease-in-out infinite;
}

@keyframes bounce-arrow {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-4px);
    }
}

.bookmark-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--bg-card);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    background: var(--accent);
    border: none;
    border-radius: 980px;
    box-shadow: 0 2px 8px var(--shadow-hover);
    text-decoration: none;
    cursor: grab;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    animation: bounce-btn 2s ease-in-out infinite;
}

/* Hide on tablet and mobile */
@media (max-width: 900px) {
    .bookmark-btn {
        display: none;
    }
}

/* Theme Toggle Button */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    margin-left: 12px;
    border: none;
    border-radius: 50%;
    background: var(--bg-card);
    color: var(--text-primary);
    box-shadow: 0 2px 8px var(--shadow);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle:hover {
    transform: scale(1.05);
    background: var(--bg-card);
    box-shadow: 0 4px 12px var(--shadow-hover);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

@keyframes bounce-btn {

    0%,
    100% {
        transform: translateY(0);
    }

    25% {
        transform: translateY(-4px);
    }

    50% {
        transform: translateY(0);
    }

    75% {
        transform: translateY(-2px);
    }
}

.bookmark-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--shadow-hover);
    animation: none;
}

.bookmark-btn:active {
    cursor: grabbing;
    transform: scale(0.98);
}

/* Custom Tooltip */
.bookmark-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    top: 50%;
    right: calc(100% + 10px);
    transform: translateY(-50%) translateX(5px);
    background: #ffffff;
    color: #1d1d1f;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.bookmark-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    right: calc(100% + 5px);
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left-color: #ffffff;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    pointer-events: none;
}

.bookmark-btn:hover::after,
.bookmark-btn:hover::before {
    opacity: 1;
    visibility: visible;
}

.bookmark-btn:hover::after {
    transform: translateY(-50%) translateX(0);
}

.bookmark-btn:hover::before {
    transform: translateY(-50%);
}

/* =========================================================================
   5. HEADER
   ========================================================================= */
header {
    text-align: center;
    margin-bottom: 32px;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

/* =========================================================================
   5.1 CONVERTER TOOL SECTION
   ========================================================================= */
.converter-tool {
    margin-bottom: 32px;
}

.converter-tool .tool-header {
    text-align: center;
    margin-bottom: 32px;
}

.converter-tool h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.converter-tool .subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 400;
}

/* Info Article */
.info-article {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 28px;
    box-shadow: 0 1px 3px var(--shadow);
}

.info-article .intro {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.info-article h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 28px;
    margin-bottom: 16px;
}

.info-article h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 20px;
    margin-bottom: 12px;
}

.info-article p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.info-article a {
    color: #1d1d1f;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.info-article a:hover {
    color: #000;
}

/* =========================================================================
   6. PANELS - Two Column Grid
   ========================================================================= */
.panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.panel {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px var(--shadow);
}

.panel-header {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    margin-bottom: 12px;
}

/* =========================================================================
   7. TEXTAREA
   ========================================================================= */
textarea {
    width: 100%;
    height: 280px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    outline: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

textarea:focus {
    background: var(--bg-card);
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--shadow-hover);
}

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

textarea[readonly] {
    background: var(--bg-input);
    cursor: default;
}

/* =========================================================================
   8. OPTIONS PANEL - NEW DESIGN
   ========================================================================= */
.options {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px var(--shadow);
}

.options-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.options-row {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.options-row+.options-row {
    margin-top: 20px;
    padding-top: 0;
}

/* =========================================================================
   9. TOGGLE GROUP
   ========================================================================= */
.toggle-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

/* Toggle Switch - iOS Style */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #D1D5DB;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 24px;
}

[data-theme="dark"] .toggle-slider {
    background-color: #4b5563;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.toggle-switch input:checked+.toggle-slider {
    background-color: var(--accent);
}

.toggle-switch input:checked+.toggle-slider:before {
    transform: translateX(20px);
}

/* Character Input */
.char-input {
    width: 48px;
    padding: 6px 8px;
    font-size: 14px;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    text-align: center;
    transition: all 0.2s ease;
}

.char-input:disabled {
    background-color: var(--bg-input);
    color: var(--text-secondary);
    cursor: not-allowed;
}

.char-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--shadow);
}

/* =========================================================================
   10. RADIO SECTION
   ========================================================================= */
.radio-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.radio-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
}

.radio-item input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-circle {
    width: 18px;
    height: 18px;
    border: 2px solid #D1D5DB;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

[data-theme="dark"] .radio-circle {
    border-color: #4b5563;
}

.radio-circle::after {
    content: "";
    width: 10px;
    height: 10px;
    background-color: var(--accent);
    border-radius: 50%;
    transform: scale(0);
    transition: transform 0.2s ease;
}

.radio-item input[type="radio"]:checked+.radio-circle {
    border-color: var(--accent);
}

.radio-item input[type="radio"]:checked+.radio-circle::after {
    transform: scale(1);
}

.radio-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.radio-item:hover .radio-circle {
    border-color: var(--text-secondary);
}

/* =========================================================================
   11. BUTTONS
   ========================================================================= */
.actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 980px;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    letter-spacing: -0.01em;
}

button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-card);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: scale(1.02);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-page);
    transform: scale(1.02);
}

.btn-secondary:active {
    transform: scale(0.98);
}

/* =========================================================================
   12. GUIDE SECTION
   ========================================================================= */
.guide {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px var(--shadow);
}

.guide-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.guide-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.guide-step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--accent);
    color: var(--bg-card);
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.step-text {
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.step-text strong {
    font-weight: 600;
}

/* =========================================================================
   13. FOOTER
   ========================================================================= */
footer {
    text-align: center;
    padding: 24px 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

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

.footer-link {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.footer-link strong {
    color: var(--text-primary);
}

/* =========================================================================
   14. RESPONSIVE
   ========================================================================= */
@media (max-width: 900px) {
    .panels {
        grid-template-columns: 1fr;
    }

    h1 {
        font-size: 1.6rem;
    }

    .options-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .radio-group {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 20px 16px;
    }

    h1 {
        font-size: 1.4rem;
    }

    .subtitle {
        font-size: 0.9rem;
    }

    textarea {
        height: 200px;
    }

    .actions {
        flex-direction: column;
    }

    .actions button {
        width: 100%;
        justify-content: center;
    }
}

/* =========================================================================
   15. TOAST NOTIFICATIONS
   ========================================================================= */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 360px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background-color: var(--accent);
    color: var(--bg-card);
    border-radius: 12px;
    box-shadow: 0 4px 20px var(--shadow-hover);
    pointer-events: auto;
    animation: toast-in 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast-success {
    background: linear-gradient(135deg, #1a7f2a 0%, #22a033 100%);
}

.toast-error {
    background: linear-gradient(135deg, #d73a3a 0%, #e54545 100%);
}

.toast-warning {
    background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    color: #1d1d1f;
}

.toast-info {
    background: var(--accent);
}

.toast-message {
    font-size: 0.9rem;
    line-height: 1.4;
}

@keyframes toast-in {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes toast-out {
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

.toast-exit {
    animation: toast-out 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@media (max-width: 480px) {
    .toast-container {
        left: 16px;
        right: 16px;
        bottom: 16px;
        max-width: none;
    }
}

/* =========================================================================
   16. CONTENT LAYOUT WITH SIDEBAR
   ========================================================================= */
.content-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
    margin-bottom: 24px;
}

.main-content {
    min-width: 0;
}

/* Enhanced Guide Section */
.guide {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 28px;
    box-shadow: 0 1px 3px var(--shadow);
    margin-bottom: 0;
}

.guide-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.guide h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 24px;
    margin-bottom: 12px;
}

.guide-intro {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.guide p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.guide-steps {
    padding-left: 20px;
    margin-bottom: 20px;
}

.guide-steps li {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.guide-steps code {
    background: var(--bg-page);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.85rem;
    color: var(--text-primary);
}

/* Examples Section */
.examples {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 20px;
}

.example-item {
    background: var(--bg-input);
    border-radius: 10px;
    padding: 16px;
    border-left: 4px solid var(--accent);
}

.example-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 8px;
}

.example-before {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: 4px;
}

.example-before::before {
    content: "→ ";
    color: #999;
}

.example-after {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'SF Mono', Monaco, monospace;
}

.example-after::before {
    content: "✓ ";
    color: #22a033;
}

/* Use Cases List */
.use-cases {
    padding-left: 20px;
}

.use-cases li {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 8px;
}

/* FAQ Section */
.faq-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 16px;
}

.faq-item {
    background: var(--bg-input);
    border-radius: 10px;
    padding: 0;
    border: 1px solid var(--border);
    overflow: hidden;
}

.faq-item summary {
    padding: 16px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-primary);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item summary:hover {
    background: var(--border);
}

.faq-item p {
    padding: 12px 16px 16px;
    margin: 0;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--text-secondary);
    padding-top: 4px;
}

/* Fieldset Reset */
fieldset.radio-section {
    border: none;
    padding: 0;
    margin: 0;
}

fieldset.radio-section legend {
    padding: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

/* =========================================================================
   17. SIDEBAR
   ========================================================================= */
.sidebar {
    position: sticky;
    top: 20px;
    height: fit-content;
}

.sidebar-section {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px var(--shadow);
}

.sidebar-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 16px;
}

.sidebar-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-links li {
    margin-bottom: 12px;
}

.sidebar-links li:last-child {
    margin-bottom: 0;
}

.sidebar-links a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 14px;
    background: var(--bg-input);
    border-radius: 8px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.sidebar-links a:hover {
    background: var(--accent);
    color: var(--bg-card);
}

/* =========================================================================
   18. RESPONSIVE - SIDEBAR
   ========================================================================= */
@media (max-width: 1024px) {
    .content-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }
}

@media (max-width: 600px) {
    .guide {
        padding: 20px;
    }

    .example-item {
        padding: 12px;
    }
}