/* CSS VARIABLES & THEMING */
:root {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-sidebar: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --sidebar-width: 260px;
    --navbar-height: 70px;
}

[data-theme="dark"] {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-sidebar: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

/* NAVBAR */
.navbar {
    height: var(--navbar-height);
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.brand-icon {
    color: var(--primary);
    font-size: 1.5rem;
}

.highlight {
    color: var(--primary);
}

.nav-search-bar {
    display: flex;
    align-items: center;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 1rem;
    width: 350px;
    gap: 0.5rem;
}

.nav-search-bar input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    width: 100%;
    font-size: 0.95rem;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* APP LAYOUT */
.app-layout {
    display: flex;
    margin-top: var(--navbar-height);
    min-height: calc(100vh - var(--navbar-height));
}

/* SIDEBAR */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    height: calc(100vh - var(--navbar-height));
    overflow-y: auto;
    padding: 1.5rem 1rem;
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-item:hover, .nav-item.active {
    background-color: var(--primary);
    color: #ffffff;
}

/* MAIN CONTENT */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: 2rem;
    max-width: calc(100% - var(--sidebar-width));
}

.tab-section {
    display: none;
}

.tab-section.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.section-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* BUTTONS */
.btn-primary {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

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

.btn-sm {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
}

/* HOMEPAGE */
.hero-banner {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 2rem;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-card), var(--border-color));
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 3rem;
    margin-bottom: 2.5rem;
}

.hero-text h1 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.hero-text p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.mini-ticker-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.mini-ticker-card h4 {
    margin-bottom: 1rem;
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.ticker-mini-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.ticker-mini-row:last-child {
    border-bottom: none;
}

.features-grid, .marketing-grid, .edu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.feature-card, .market-box, .edu-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.75rem;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover, .market-box:hover, .edu-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.feature-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.feature-card h3, .market-box h3, .edu-card h3 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.feature-card p, .market-box p, .edu-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* DASHBOARD & CHARTS */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
}

.stat-card span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.stat-card h3 {
    font-size: 1.5rem;
    margin: 0.5rem 0;
}

.chart-container-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.chart-container-box h3 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

/* STOCK ANALYSIS & SEARCH */
.search-box-large {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.search-box-large input {
    flex: 1;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
}

.analysis-results-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
}

.stock-header-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.badge-price {
    background-color: var(--primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: 700;
}

.stock-metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.metric-item {
    background-color: var(--bg-main);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.metric-item span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.stock-recommendation-box {
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.stock-recommendation-box h4 {
    margin-bottom: 0.5rem;
}

.stock-recommendation-box p {
    color: var(--text-muted);
}

/* TECHNICAL CONTROLS */
.tech-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.tech-controls select {
    background-color: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    outline: none;
}

.indicators-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.ind-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.ind-card span {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* NEWS */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.news-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.25rem;
}

.news-time {
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 600;
}

.news-item h4 {
    margin: 0.25rem 0;
    font-size: 1.05rem;
}

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

/* WATCHLIST TABLE */
.watchlist-table-wrapper {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.watchlist-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.watchlist-table th, .watchlist-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.watchlist-table th {
    background-color: var(--bg-main);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
}

.watchlist-table tr:last-child td {
    border-bottom: none;
}

/* P&L CALCULATOR */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.calc-form, .calc-results-card, .risk-card-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.form-group input {
    width: 100%;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-main);
    font-size: 1rem;
    outline: none;
}

.calc-results-card h3, .risk-card-container h3 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.result-row:last-of-type {
    border-bottom: none;
}

.trade-verdict {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9rem;
}

/* AI CHAT */
.chat-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    height: 600px;
}

.chat-messages {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-message {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    max-width: 80%;
}

.chat-message.user {
    margin-left: auto;
    flex-direction: row-reverse;
}

.chat-message i {
    width: 35px;
    height: 35px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.msg-bubble {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 0.85rem 1.25rem;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.4;
}

.chat-message.user .msg-bubble {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}

.chat-input-area {
    display: flex;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    gap: 1rem;
}

.chat-input-area input {
    flex: 1;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    color: var(--text-main);
    outline: none;
}

/* UTILS */
.text-success { color: var(--success) !important; }
.text-danger { color: var(--danger) !important; }
.text-warning { color: var(--warning) !important; }
.text-primary { color: var(--primary) !important; }
.text-muted { color: var(--text-muted) !important; }
.hidden { display: none !important; }

/* RESPONSIVE */
@media (max-width: 900px) {
    .sidebar { width: 70px; padding: 1rem 0.5rem; }
    .sidebar .nav-item span { display: none; }
    .main-content { margin-left: 70px; max-width: calc(100% - 70px); }
    .hero-banner, .calculator-grid, .stock-metrics-grid { grid-template-columns: 1fr; }
    .nav-search-bar { width: 200px; }
}