:root {
    --font-primary: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --color-bg-dark: #0f172a;
    --color-bg-medium: #1e293b;
    --color-border: #334155;
    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-accent-cyan: #0ea5e9;
    --color-accent-magenta: #ec4899;
    --color-accent-green: #10b981;
    --color-accent-red: #ef4444;
    --color-accent-purple: #8b5cf6;
    --border-radius: 8px;
    --transition-speed: 0.3s;
    --card-bg: rgba(30, 41, 59, 0.7);
    --backdrop-blur: 10px;
}

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

body {
    background-color: var(--color-bg-dark);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

#tsparticles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.main-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    grid-template-rows: auto 1fr auto;
    grid-template-areas:
        "header header"
        "sidebar main"
        "footer footer";
    min-height: 100vh;
    gap: 1.5rem;
    padding: 1.5rem;
    max-width: 1600px;
    margin: 0 auto;
}

.main-header {
    grid-area: header;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1rem;
}

.header-title {
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(90deg, #0ea5e9, #8b5cf6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.header-title span {
    font-size: 1.3rem;
    vertical-align: super;
}

.stock-selector-wrapper {
    min-width: 300px;
}

.sidebar {
    grid-area: sidebar;
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: 85vh;
    overflow: hidden;
}

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

.sidebar-title {
    font-size: 1.5rem;
    padding-bottom: 0.5rem;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
}

.portfolio-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: 100%;
    transition: all 0.3s ease;
}

.portfolio-content.collapsed {
    height: 0;
    overflow: hidden;
}

.portfolio-input-area {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.portfolio-input-area label {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}
textarea#portfolio-input {
    background: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 0.75rem;
    color: var(--color-text-primary);
    font-family: var(--font-mono);
    resize: vertical;
    min-height: 80px;
}

.portfolio-list {
    flex-grow: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.portfolio-item {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas: "symbol value" "qty price";
    gap: 0 1rem;
    padding: 0.75rem;
    background: var(--color-bg-medium);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
}
.portfolio-item .symbol { grid-area: symbol; font-weight: 600; }
.portfolio-item .qty { grid-area: qty; font-size: 0.8rem; color: var(--color-text-secondary); }
.portfolio-item .price { grid-area: price; font-size: 0.9rem; font-family: var(--font-mono); text-align: right; }
.portfolio-item .value { grid-area: value; font-weight: 600; font-family: var(--font-mono); text-align: right; }

.portfolio-summary {
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
    text-align: center;
}
.portfolio-summary h3 {
    color: var(--color-text-secondary);
    font-weight: 400;
    margin-bottom: 0.5rem;
}
.portfolio-summary p {
    font-size: 1.75rem;
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--color-accent-green);
}

.main-content {
    grid-area: main;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    height: 85vh;
    overflow-y: auto;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--backdrop-blur));
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}
.card-header {
    margin-bottom: 1.5rem;
}
.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.btn {
    background: linear-gradient(90deg, #0ea5e9, #8b5cf6);
    color: white;
    border: none;
    padding: 0.7rem 1.3rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
}
.btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.select-box, .date-input {
    width: 100%;
    background: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: 0.7rem;
    color: var(--color-text-primary);
    font-family: var(--font-primary);
}

.controls-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: flex-end;
}
.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}
.control-group label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}
.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.btn-range {
    background: var(--color-bg-medium);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 0.6rem 0.9rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-size: 0.9rem;
}
.btn-range:hover {
    background: var(--color-border);
    color: var(--color-text-primary);
}
.btn-range.active {
    background: linear-gradient(90deg, #0ea5e9, #8b5cf6);
    color: white;
    border-color: transparent;
}

.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    gap: 1rem;
    color: var(--color-text-secondary);
}
.spinner {
    border: 4px solid var(--color-border);
    border-top: 4px solid var(--color-accent-cyan);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}
.message-box {
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 600;
}
.message-box.error { background-color: rgba(239, 68, 68, 0.2); color: var(--color-accent-red); }
.message-box.success { background-color: rgba(16, 185, 129, 0.2); color: var(--color-accent-green); }

.plot-container {
    width: 100%;
    height: 450px;
}
.plot-container.small {
    height: 250px;
}
.secondary-charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.info-item span { 
    display: block;
    font-size: 0.85rem; 
    color: var(--color-text-secondary); 
    margin-bottom: 0.3rem;
}
.info-item p, .info-item a { 
    font-weight: 500; 
    color: var(--color-text-primary); 
    text-decoration: none;
}
.info-item a:hover { 
    color: var(--color-accent-cyan); 
    text-decoration: underline;
}
.company-summary { 
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 1.2rem;
    margin-top: 1.5rem;
}
.metric-card {
    text-align: center;
    padding: 1.2rem 1rem;
    background: var(--color-bg-medium);
    border-radius: var(--border-radius);
}
.metric-card h3 {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}
.metric-card p {
    font-size: 1.4rem;
    font-family: var(--font-mono);
    font-weight: 600;
}

.similar-news-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.similar-stocks-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}
.similar-stock-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.9rem;
    background: var(--color-bg-medium);
    border-radius: var(--border-radius);
}
.similar-stock-item .symbol { 
    font-weight: 600; 
    font-size: 1.1rem;
}
.similar-stock-item .price { 
    font-family: var(--font-mono); 
    color: var(--color-accent-green);
    font-weight: 500;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.news-item {
    padding: 1rem;
    background: var(--color-bg-medium);
    border-radius: var(--border-radius);
    transition: transform 0.2s;
}
.news-item:hover {
    transform: translateY(-3px);
}
.news-item h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}
.news-item a {
    color: var(--color-text-primary);
    text-decoration: none;
}
.news-item a:hover {
    color: var(--color-accent-cyan);
    text-decoration: underline;
}
.news-date {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

.main-footer {
    grid-area: footer;
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}
.disclaimer { 
    font-size: 0.8rem; 
    margin-top: 0.5rem;
}

@media (max-width: 1024px) {
    .main-grid {
        grid-template-columns: 1fr;
        grid-template-areas:
            "header"
            "main"
            "sidebar"
            "footer";
    }
    .sidebar {
        height: auto;
    }
    .stock-selector-wrapper { 
        width: 100%; 
        margin-top: 1rem; 
    }
    .main-header { 
        flex-direction: column; 
        align-items: flex-start; 
        gap: 1rem;
    }
    .similar-news-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .controls-bar { 
        flex-direction: column; 
        align-items: stretch;
    }
    .secondary-charts-grid {
        grid-template-columns: 1fr;
    }
    .plot-container {
        height: 350px;
    }
}