:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --accent-color: #10b981;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: radial-gradient(circle at top right, #1e1b4b, #0f172a);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

header {
    padding: 2rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(to right, #818cf8, #c084fc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

main {
    flex: 1;
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    padding: 2rem 4rem;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

aside {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.card h2 {
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tabs {
    display: flex;
    background: #111827;
    padding: 0.25rem;
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
}

.tab {
    flex: 1;
    padding: 0.5rem;
    text-align: center;
    cursor: pointer;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: all 0.2s;
}

.tab.active {
    background: var(--primary-color);
    color: white;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 0.375rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

input[type="text"],
input[type="number"],
select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background: #111827;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: white;
    font-size: 0.875rem;
    transition: border-color 0.2s;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
}

.btn {
    display: block;
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    font-size: 0.9rem;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--border-color);
}

.plot-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.plot-chart {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    height: 800px;
    overflow: hidden;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    margin-top: 1rem;
}

/* Custom file upload */
.file-upload {
    position: relative;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.file-upload input[type="file"] {
    position: absolute;
    top: 0;
    right: 0;
    min-width: 100%;
    min-height: 100%;
    font-size: 100px;
    text-align: right;
    filter: alpha(opacity=0);
    opacity: 0;
    outline: none;
    cursor: pointer;
    display: block;
}

.footer {
    padding: 2rem 4rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.card {
    animation: fadeIn 0.5s ease-out forwards;
}

/* Responsive */
@media (max-width: 1024px) {
    main {
        grid-template-columns: 1fr;
    }

    aside {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .card {
        flex: 1;
        min-width: 300px;
    }
}