:root {
    --nvidia-green: #76B900;
    --nvidia-green-glow: rgba(118, 185, 0, 0.4);
    --bg-dark: #0a0e14;
    --bg-card: rgba(18, 26, 36, 0.85);
    --border-color: rgba(118, 185, 0, 0.25);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --accent-blue: #38bdf8;
    --accent-purple: #c084fc;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(118, 185, 0, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(56, 189, 248, 0.05) 0%, transparent 40%);
    color: var(--text-main);
    min-height: 100vh;
    padding: 24px 16px;
    line-height: 1.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
}

/* Header */
.hero-header {
    background: linear-gradient(135deg, rgba(118, 185, 0, 0.12) 0%, rgba(18, 26, 36, 0.9) 100%);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 28px;
    backdrop-filter: blur(16px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
}

.hero-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background: var(--nvidia-green);
    box-shadow: 0 0 16px var(--nvidia-green);
}

.hero-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.hero-title {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-badge {
    background: var(--nvidia-green);
    color: #000;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 5px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.hero-sub {
    font-size: 1.05rem;
    color: var(--text-muted);
    margin-top: 10px;
    max-width: 900px;
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
    margin-top: 24px;
}

.spec-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 12px 16px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.spec-card:hover {
    border-color: var(--border-color);
    transform: translateY(-2px);
}

.spec-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.spec-value {
    font-size: 1rem;
    font-weight: 700;
    color: var(--nvidia-green);
    margin-top: 2px;
}

/* Tabs Navigation */
.tabs-nav {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-subtle);
}

.tab-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid transparent;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 12px 20px;
    border-radius: 12px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.tab-btn.active {
    background: rgba(118, 185, 0, 0.15);
    border-color: var(--nvidia-green);
    color: #fff;
    box-shadow: 0 0 16px rgba(118, 185, 0, 0.2);
}

/* Tab Panels */
.tab-content {
    display: none;
}

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

.workspace-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

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

.panel-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 24px;
    backdrop-filter: blur(12px);
}

.panel-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Form Elements */
.form-group {
    margin-bottom: 16px;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
}

textarea, input[type="text"], select {
    width: 100%;
    background: rgba(10, 14, 20, 0.8);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 12px 14px;
    color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s ease;
}

textarea:focus, input[type="text"]:focus, select:focus {
    outline: none;
    border-color: var(--nvidia-green);
    box-shadow: 0 0 10px var(--nvidia-green-glow);
}

.presets-container {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.preset-chip {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s ease;
}

.preset-chip:hover {
    background: rgba(118, 185, 0, 0.2);
    border-color: var(--nvidia-green);
    color: #fff;
}

.btn-primary {
    width: 100%;
    background: linear-gradient(135deg, var(--nvidia-green) 0%, #598c00 100%);
    color: #000;
    font-size: 1rem;
    font-weight: 700;
    padding: 14px;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 16px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px var(--nvidia-green-glow);
}

/* File Drop Zone */
.drop-zone {
    border: 2px dashed var(--border-subtle);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    cursor: pointer;
    background: rgba(10, 14, 20, 0.4);
    transition: all 0.2s ease;
}

.drop-zone:hover {
    border-color: var(--nvidia-green);
    background: rgba(118, 185, 0, 0.05);
}

.drop-icon {
    font-size: 2.2rem;
    margin-bottom: 8px;
}

.drop-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.drop-preview {
    max-width: 100%;
    max-height: 200px;
    border-radius: 8px;
    margin-top: 12px;
    display: none;
}

/* Output Display */
.cot-container {
    background: rgba(15, 23, 42, 0.9);
    border-left: 4px solid var(--nvidia-green);
    border-radius: 8px;
    padding: 16px;
    font-family: 'Fira Code', monospace;
    font-size: 0.88rem;
    color: #a7f3d0;
    margin-bottom: 16px;
    max-height: 280px;
    overflow-y: auto;
}

.cot-header {
    font-weight: 700;
    color: var(--nvidia-green);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.response-container {
    background: rgba(10, 14, 20, 0.6);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 20px;
    min-height: 220px;
}

.markdown-body {
    line-height: 1.7;
}

.markdown-body h3 {
    margin-bottom: 12px;
    color: #fff;
}

.markdown-body ul, .markdown-body ol {
    padding-left: 20px;
    margin-bottom: 12px;
}

.markdown-body code {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-subtle);
}