:root[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --error: #ef4444;
    --success: #22c55e;
    --google-link: #8ab4f8;
    --google-desc: #bdc1c6;
    --code-bg: #0b0f19;
}

:root[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --error: #ef4444;
    --success: #22c55e;
    --google-link: #1a0dab;
    --google-desc: #4d5156;
    --code-bg: #1e293b;
}

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    transition: background-color 0.3s, color 0.3s;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--accent);
}

.nav-brand h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Base Buttons */
.btn {
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.875rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
}

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

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

.btn-outline {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background-color: var(--bg-tertiary);
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, background 0.2s;
}

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

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

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

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: block;
}

/* Layout */
.layout-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 32px;
    min-height: calc(100vh - 70px);
}

/* Editor Panel */
.editor-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
    overflow-y: auto;
}

.card {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border-color);
}

.card h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h2 {
    margin-bottom: 0;
}

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 16px;
}

.form-row {
    display: flex;
    gap: 16px;
}

.flex-1 {
    flex: 1;
}

label {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.char-count {
    font-size: 0.75rem;
    font-weight: 400;
}

.char-count.warn {
    color: #eab308;
}

.char-count.error {
    color: var(--error);
}

input[type="text"],
input[type="url"],
textarea,
select {
    width: 100%;
    padding: 10px 14px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    transition: border-color 0.2s;
    outline: none;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--accent);
}

/* Switch Toggle */
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: .3s;
    border-radius: 24px;
    border: 1px solid var(--border-color);
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 2px;
    bottom: 2px;
    background-color: var(--text-secondary);
    transition: .3s;
    border-radius: 50%;
}

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

input:checked+.slider:before {
    transform: translateX(20px);
    background-color: white;
}

.hidden {
    display: none !important;
}

/* Output Panel */
.output-panel {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 94px;
    height: calc(100vh - 120px);
    background-color: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
}

.tab-btn {
    flex: 1;
    padding: 14px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    background-color: var(--bg-secondary);
}

.tab-content {
    display: none;
    flex: 1;
    overflow: auto;
    padding: 0;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
}

/* Code Output */
.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: var(--code-bg);
    border-bottom: 1px solid var(--border-color);
}

.code-lang {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.05em;
}

pre {
    margin: 0;
    padding: 16px;
    flex: 1;
    background: var(--code-bg);
    overflow: auto;
}

code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: #e2e8f0;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Html Syntax Highlight simple */
.tag {
    color: #ec4899;
}

.attr {
    color: #a21caf;
}

.val {
    color: #eab308;
}

[data-theme="dark"] code {
    color: #e2e8f0;
}

[data-theme="dark"] .tag {
    color: #f472b6;
}

[data-theme="dark"] .attr {
    color: #38bdf8;
}

[data-theme="dark"] .val {
    color: #a3e635;
}

/* Previews */
#preview-view {
    padding: 24px;
    gap: 32px;
    background-color: var(--bg-primary);
}

.preview-card h3 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Google Preview */
.g-result {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.g-url {
    font-size: 12px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.g-title {
    font-size: 20px;
    color: var(--google-link);
    margin-bottom: 4px;
    text-decoration: none;
    cursor: pointer;
}

.g-title:hover {
    text-decoration: underline;
}

.g-desc {
    font-size: 14px;
    color: var(--google-desc);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Social Preview */
.s-card {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg-secondary);
}

.s-image {
    height: 200px;
    background-color: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    background-size: cover;
    background-position: center;
}

.s-content {
    padding: 12px 16px;
}

.s-domain {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 2px;
    text-transform: uppercase;
}

.s-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.s-desc {
    font-size: 14px;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: #10b981;
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 500;
    font-size: 0.875rem;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .layout-container {
        grid-template-columns: 1fr;
    }

    .output-panel {
        position: relative;
        top: 0;
        height: 600px;
    }
}

@media (max-width: 600px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }
}