:root {
    --bg-color: #0d1117;
    --panel-bg: rgba(22, 27, 34, 0.7);
    --border-color: rgba(48, 54, 61, 0.8);
    --text-main: #c9d1d9;
    --text-muted: #8b949e;
    --accent: #2ea043;
    --accent-hover: #3fb950;
    --input-bg: rgba(1, 4, 9, 0.5);

    --code-bg: #010409;
    --code-keyword: #ff7b72;
    --code-string: #a5d6ff;
    --code-comment: #8b949e;
    --code-variable: #79c0ff;

    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius: 12px;
    --radius-sm: 6px;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
    background-image: radial-gradient(circle at top center, rgba(46, 160, 67, 0.05), transparent 60%);
}

.text-accent {
    color: var(--accent);
}

.app-container {
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    max-width: 1400px;
}

header {
    margin-bottom: 2rem;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: #fff;
}

header p {
    color: var(--text-muted);
}

.grid-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 1.5rem;
    align-items: stretch;
}

@media (max-width: 900px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.flex-col {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 180px);
    min-height: 600px;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    overflow-x: auto;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: var(--accent);
    background: rgba(46, 160, 67, 0.1);
}

.tab-content {
    display: none;
    flex-direction: column;
    gap: 1.25rem;
}

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

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-main);
}

.glass-input {
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    padding: 0.6rem 0.75rem;
    outline: none;
    transition: border-color 0.2s;
}

textarea.glass-input {
    resize: vertical;
}

.glass-input:focus {
    border-color: var(--accent);
}

.w-24 {
    width: 6rem;
}

.check-group {
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
}

.check-group input[type="checkbox"] {
    appearance: none;
    width: 1.1rem;
    height: 1.1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg);
    cursor: pointer;
    display: grid;
    place-content: center;
}

.check-group input[type="checkbox"]::before {
    content: "";
    width: 0.65em;
    height: 0.65em;
    transform: scale(0);
    transition: 120ms transform ease-in-out;
    box-shadow: inset 1em 1em var(--accent);
    background-color: transform;
    transform-origin: center;
    clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}

.check-group input[type="checkbox"]:checked::before {
    transform: scale(1);
}

.radio-wrap {
    display: flex;
    gap: 1.5rem;
}

.radio-wrap label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 400;
}

.radio-wrap input[type="radio"] {
    accent-color: var(--accent);
    cursor: pointer;
}

.settings-group {
    display: none;
    flex-direction: column;
    gap: 1.25rem;
    padding-left: 0.5rem;
    border-left: 2px solid var(--border-color);
}

.settings-group.active {
    display: flex;
}

.mt-3 {
    margin-top: 1rem;
}

.mt-2 {
    margin-top: 0.5rem;
}

.divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

/* Preview */
.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.preview-header h2 {
    font-size: 1.1rem;
    font-family: var(--font-mono);
    color: #fff;
}

.actions {
    display: flex;
    gap: 0.75rem;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    font-family: var(--font-sans);
}

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

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

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.editor-wrap {
    flex: 1;
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: auto;
    padding: 1rem;
}

pre {
    margin: 0;
}

code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-main);
}

/* Syntax Highlighting */
.hl-keyword {
    color: var(--code-keyword);
}

.hl-string {
    color: var(--code-string);
}

.hl-comment {
    color: var(--code-comment);
}

.hl-var {
    color: var(--code-variable);
}