:root {
    --bg-dark: #07080c;
    --sidebar-bg: rgba(13, 15, 23, 0.85);
    --card-bg: rgba(18, 21, 32, 0.8);
    --border-color: rgba(255, 255, 255, 0.08);
    --accent-red: #ef4444;
    --accent-orange: #f97316;
    --accent-blue: #38bdf8;
    --accent-purple: #c084fc;
    --accent-green: #34d399;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --font-heading: 'Outfit', sans-serif;
    --font-sans: 'Plus Jakarta Sans', sans-serif;
    --font-mono: 'Fira Code', monospace;
}

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

body {
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(239, 68, 68, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(56, 189, 248, 0.12) 0%, transparent 40%);
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
}

/* Top Navigation Bar */
.top-nav-bar {
    height: 60px;
    background: rgba(13, 15, 23, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.brand-text {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-item {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    transition: color 0.2s ease;
}

.nav-item:hover, .nav-item.active {
    color: var(--text-main);
}

.btn-create-key-header {
    background: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 18px;
    font-size: 13px;
    font-weight: 800;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

/* Main Grid Layout */
.labs-grid-layout {
    display: grid;
    grid-template-columns: 300px 1fr 340px;
    height: calc(100vh - 60px);
}

/* Sidebar Controls */
.controls-sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 24px 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.panel-section-header {
    margin-bottom: 4px;
}

.panel-section-header h2 {
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 900;
    letter-spacing: 1.5px;
    color: var(--text-main);
}

.sub-header-tag {
    font-size: 11px;
    color: var(--accent-blue);
    font-weight: 700;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group label {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
}

.labs-select {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: #0d0f17;
    border: 1px solid var(--border-color);
    color: #ffffff;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
    outline: none;
    cursor: pointer;
    background-image: url("data:image/svg+xml;utf8,<svg fill='%2338bdf8' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/></svg>");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 18px;
}

.labs-select option {
    background: #121520;
    color: #ffffff;
    padding: 10px;
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slider-val {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent-blue);
    font-weight: 700;
}

.labs-slider {
    width: 100%;
    accent-color: var(--accent-blue);
    cursor: pointer;
}

.control-hint {
    font-size: 10px;
    color: #64748b;
}

.labs-input, .labs-textarea, .labs-textarea-prompt {
    background: #090a0f;
    border: 1px solid var(--border-color);
    color: #ffffff;
    padding: 10px 12px;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 13px;
    outline: none;
}

.labs-textarea {
    resize: vertical;
}

/* Center Playground */
.playground-main {
    padding: 24px 32px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.playground-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.playground-header h2 {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 900;
}

.btn-run-experiment {
    background: linear-gradient(135deg, #0284c7 0%, #38bdf8 100%);
    color: white;
    border: none;
    padding: 10px 22px;
    border-radius: 10px;
    font-weight: 800;
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 18px rgba(56, 189, 248, 0.3);
}

.prompt-card, .output-response-card, .thinking-output-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.labs-textarea-prompt {
    width: 100%;
    resize: vertical;
    min-height: 90px;
}

.thinking-output-card {
    background: rgba(2, 132, 199, 0.08);
    border-color: rgba(56, 189, 248, 0.3);
}

.thinking-header {
    font-size: 12px;
    font-weight: 800;
    color: var(--accent-blue);
}

.thinking-body {
    font-family: var(--font-mono);
    font-size: 12px;
    color: #cbd5e1;
    white-space: pre-wrap;
    max-height: 140px;
    overflow-y: auto;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.output-status {
    font-size: 11px;
    font-weight: 800;
    color: var(--accent-green);
}

.output-body {
    min-height: 180px;
    background: #090a0f;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 16px;
    font-size: 13px;
    line-height: 1.6;
    overflow-y: auto;
}

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

/* Right Snippet Sidebar */
.snippet-sidebar {
    background: var(--sidebar-bg);
    border-left: 1px solid var(--border-color);
    padding: 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow-y: auto;
}

.api-key-badge-box label {
    font-size: 11px;
    font-weight: 800;
    color: var(--accent-blue);
}

.api-key-badge-box input {
    width: 100%;
    background: #090a0f;
    border: 1px solid var(--border-color);
    color: var(--accent-blue);
    font-family: var(--font-mono);
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
    margin-top: 4px;
}

.snippet-tabs-header {
    display: flex;
    background: #090a0f;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.snippet-tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 8px 0;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}

.snippet-tab.active {
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-blue);
}

.snippet-code-box pre {
    background: #090a0f;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: #e2e8f0;
    overflow-x: auto;
    white-space: pre-wrap;
    max-height: 400px;
}

.btn-copy-snippet {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 10px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.hidden {
    display: none !important;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-card {
    background: #121520;
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    width: 480px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.close-modal-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
}

.key-display-row {
    display: flex;
    gap: 10px;
    margin-top: 12px;
}

.key-display-row input {
    flex: 1;
    background: #090a0f;
    border: 1px solid var(--border-color);
    color: var(--accent-blue);
    font-family: var(--font-mono);
    padding: 10px;
    border-radius: 8px;
    font-size: 13px;
}

.btn-copy-modal-key {
    background: var(--accent-blue);
    color: #0f172a;
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    font-weight: 800;
    cursor: pointer;
}