:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1e1e1e;
    --border-color: #262626;
    --text-primary: #e6edf3;
    --text-secondary: #7d8590;
    --accent-green: #4ade80;
    --accent-red: #ef4444;
    --accent-yellow: #fbbf24;
    --accent-cyan: #22d3ee;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
}

/* Loader */
#loader {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.9);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

#loader.active {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-green);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Mac Window Frame */
.mac-window {
    background: var(--bg-primary);
    border-radius: 10px;
    overflow: hidden;
    margin: 16px auto;
    max-width: 1600px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    border: 1px solid var(--border-color);
}

.mac-titlebar {
    background: #161616;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid #0a0a0a;
}

.mac-buttons {
    display: flex;
    gap: 8px;
}

.mac-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: none;
}

.mac-btn.close { background: #ff5f57; }
.mac-btn.minimize { background: #febc2e; }
.mac-btn.maximize { background: #28c840; }

.mac-title {
    flex: 1;
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
}

.mac-spacer {
    width: 52px;
}

/* App Container */
.app-container {
    padding: 24px;
}

.app-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 8px;
}

.logo {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo svg {
    width: 48px;
    height: 48px;
}

.brand {
    color: var(--accent-green);
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.page-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 4px 0;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

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

.card-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Input Row */
.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 24px;
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.input-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-field label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-field input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    transition: border-color 0.15s ease;
}

.input-field input:hover {
    border-color: var(--accent-green);
}

.input-field input:focus {
    outline: none;
    border-color: var(--accent-green);
    box-shadow: 0 0 0 2px rgba(74, 222, 128, 0.15);
}

.btn-field {
    justify-content: flex-end;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.btn.primary {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: #0a0a0a;
}

.btn.primary:hover {
    background: #6ee7a0;
    border-color: #6ee7a0;
}

.btn svg {
    width: 14px;
    height: 14px;
}

/* Metrics Card */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.metric-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 12px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.metric-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.metric-value.positive { color: var(--accent-green); }
.metric-value.negative { color: var(--accent-red); }
.metric-value.highlight { color: var(--accent-yellow); }

.metric-label {
    font-size: 9px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.chart-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.plot-container {
    height: 300px;
    width: 100%;
}

/* Footer */
.footer {
    text-align: center;
    padding: 24px;
    color: var(--text-secondary);
    font-size: 11px;
    border-top: 1px solid var(--border-color);
    margin-top: 24px;
}

/* Responsive */
@media (max-width: 1200px) {
    .input-row {
        grid-template-columns: 1fr;
    }
    
    .metrics-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (max-width: 900px) {
    .mac-window {
        margin: 10px;
        border-radius: 8px;
    }
    
    .app-container {
        padding: 16px;
    }
    
    .page-title {
        font-size: 22px;
    }
    
    .input-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .plot-container {
        height: 280px;
    }
}

@media (max-width: 600px) {
    .input-grid {
        grid-template-columns: 1fr;
    }
    
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .metric-value {
        font-size: 14px;
    }
}