/* ==============================================
   Crypto Decision System - Main Stylesheet
   Version: 1.0
   ============================================== */

/* ==============================================
   CSS Variables (Custom Properties)
   ============================================== */

:root {
    /* Colors */
    --primary: #6c5ce7;
    --primary-dark: #5a4bd1;
    --secondary: #2d3436;
    --success: #00b894;
    --danger: #e17055;
    --warning: #fdcb6e;
    --info: #74b9ff;
    --light: #f8f9fa;
    --dark: #2d3436;
    --gray: #636e72;
    --gray-light: #dfe6e9;
    --gray-dark: #2d3436;
    --white: #ffffff;
    --body-bg: #f0f2f5;
    --card-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    --card-hover-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    
    /* Fonts */
    --font-primary: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Cascadia Code', 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ==============================================
   Base Styles
   ============================================== */

* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background-color: var(--body-bg);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

/* ==============================================
   Typography
   ============================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--dark);
    letter-spacing: -0.02em;
    margin-top: 0;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

code, pre {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

/* ==============================================
   Container
   ============================================== */

.container-fluid {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ==============================================
   Cards
   ============================================== */

.card {
    background: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--card-hover-shadow);
}

.card-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-light);
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    background: var(--white);
    border-top: 1px solid var(--gray-light);
    padding: var(--spacing-md) var(--spacing-lg);
}

/* ==============================================
   Stats / Summary Cards
   ============================================== */

.stat-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    text-align: center;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-hover-shadow);
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
    margin-bottom: var(--spacing-xs);
}

.stat-card .stat-label {
    font-size: 0.85rem;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.stat-card .stat-icon {
    font-size: 2rem;
    color: var(--gray-light);
    margin-bottom: var(--spacing-sm);
}

/* Stat Card Variations */
.stat-card.success .stat-value { color: var(--success); }
.stat-card.danger .stat-value { color: var(--danger); }
.stat-card.warning .stat-value { color: var(--warning); }
.stat-card.info .stat-value { color: var(--info); }
.stat-card.primary .stat-value { color: var(--primary); }

/* ==============================================
   Signal Badges
   ============================================== */

.signal-badge {
    display: inline-block;
    padding: 4px 16px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all var(--transition-fast);
}

.signal-badge.buy {
    background: rgba(0, 184, 148, 0.15);
    color: var(--success);
}

.signal-badge.sell {
    background: rgba(225, 112, 85, 0.15);
    color: var(--danger);
}

.signal-badge.hold {
    background: rgba(99, 110, 114, 0.15);
    color: var(--gray);
}

.signal-badge.buy.bg-solid { background: var(--success); color: white; }
.signal-badge.sell.bg-solid { background: var(--danger); color: white; }
.signal-badge.hold.bg-solid { background: var(--gray); color: white; }

/* ==============================================
   Heatmap / Portfolio Grid
   ============================================== */

.heatmap-card {
    transition: all var(--transition-normal);
    border-radius: var(--radius-md);
    height: 100%;
    background: var(--white);
    border: 2px solid var(--gray-light);
    padding: var(--spacing-md);
    cursor: pointer;
}

.heatmap-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-hover-shadow);
}

.heatmap-card.border-buy { border-color: var(--success); }
.heatmap-card.border-sell { border-color: var(--danger); }
.heatmap-card.border-hold { border-color: var(--gray-light); }

.heatmap-card .symbol {
    font-weight: 700;
    font-size: 1.1rem;
}

.heatmap-card .name {
    font-size: 0.85rem;
    color: var(--gray);
}

.heatmap-card .price {
    font-size: 1.2rem;
    font-weight: 600;
}

.heatmap-card .change {
    font-weight: 600;
    font-size: 0.9rem;
}

.heatmap-card .change.positive { color: var(--success); }
.heatmap-card .change.negative { color: var(--danger); }

.heatmap-card.no-data {
    opacity: 0.5;
    pointer-events: none;
}

/* ==============================================
   Tables
   ============================================== */

.table {
    margin-bottom: 0;
}

.table th {
    background: var(--gray-light);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-bottom: 2px solid var(--gray-light);
    padding: var(--spacing-sm) var(--spacing-md);
}

.table td {
    padding: var(--spacing-sm) var(--spacing-md);
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-light);
}

.table .positive { color: var(--success); }
.table .negative { color: var(--danger); }

.table-hover tbody tr:hover {
    background: rgba(108, 92, 231, 0.05);
}

.table-sortable th {
    cursor: pointer;
    user-select: none;
}

.table-sortable th:hover {
    background: var(--gray-light);
}

/* ==============================================
   Forms
   ============================================== */

.form-control, .form-select {
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-light);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    font-family: var(--font-primary);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
    outline: none;
}

.form-label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
    color: var(--dark);
}

/* ==============================================
   Buttons
   ============================================== */

.btn {
    border-radius: var(--radius-sm);
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: all var(--transition-fast);
    font-family: var(--font-primary);
}

.btn-primary {
    background: var(--primary);
    border: 1px solid var(--primary);
    color: white;
}

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

.btn-success { background: var(--success); border-color: var(--success); color: white; }
.btn-success:hover { background: #00a381; border-color: #00a381; color: white; }

.btn-danger { background: var(--danger); border-color: var(--danger); color: white; }
.btn-danger:hover { background: #d63031; border-color: #d63031; color: white; }

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
    background: transparent;
}

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

/* ==============================================
   Progress Bars
   ============================================== */

.progress-bar-custom {
    height: 6px;
    border-radius: 10px;
    background: var(--gray-light);
    overflow: hidden;
    margin-top: var(--spacing-xs);
}

.progress-bar-custom .progress-fill {
    height: 100%;
    border-radius: 10px;
    transition: width 0.6s ease;
}

.progress-bar-custom .progress-fill.bg-success { background: var(--success); }
.progress-bar-custom .progress-fill.bg-danger { background: var(--danger); }
.progress-bar-custom .progress-fill.bg-warning { background: var(--warning); }
.progress-bar-custom .progress-fill.bg-primary { background: var(--primary); }

/* ==============================================
   Alerts / Notifications
   ============================================== */

.alert {
    border-radius: var(--radius-md);
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
}

.alert-info {
    background: rgba(116, 185, 255, 0.1);
    color: #0984e3;
}

.alert-success {
    background: rgba(0, 184, 148, 0.1);
    color: var(--success);
}

.alert-danger {
    background: rgba(225, 112, 85, 0.1);
    color: var(--danger);
}

.alert-warning {
    background: rgba(253, 203, 110, 0.1);
    color: #e17055;
}

/* ==============================================
   Loading Spinner
   ============================================== */

.spinner-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl);
}

.spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.25rem;
}

/* ==============================================
   Navigation / Header
   ============================================== */

.navbar-custom {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.navbar-custom .navbar-brand {
    font-weight: 700;
    color: var(--primary);
    font-size: 1.25rem;
}

.navbar-custom .nav-link {
    color: var(--gray);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.navbar-custom .nav-link:hover,
.navbar-custom .nav-link.active {
    color: var(--primary);
    background: rgba(108, 92, 231, 0.08);
}

/* ==============================================
   Footer
   ============================================== */

.footer {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--gray-light);
    text-align: center;
    color: var(--gray);
    font-size: 0.85rem;
}

/* ==============================================
   Empty State
   ============================================== */

.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state .icon {
    font-size: 4rem;
    color: var(--gray-light);
    margin-bottom: var(--spacing-md);
}

.empty-state h4 {
    color: var(--gray);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--gray);
}

/* ==============================================
   Responsive Utilities
   ============================================== */

@media (max-width: 768px) {
    .container-fluid {
        padding: var(--spacing-md);
    }
    
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.3rem; }
    
    .stat-card .stat-value {
        font-size: 1.5rem;
    }
    
    .heatmap-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .table-responsive {
        font-size: 0.85rem;
    }
}

@media (max-width: 576px) {
    .heatmap-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-card .stat-value {
        font-size: 1.2rem;
    }
}

/* ==============================================
   Dark Mode (Optional)
   ============================================== */

@media (prefers-color-scheme: dark) {
    :root {
        --body-bg: #1a1a2e;
        --white: #16213e;
        --dark: #e0e0e0;
        --gray-light: #2d2d44;
        --gray: #a0a0b8;
        --light: #2d2d44;
        --card-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
        --card-hover-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    }
    
    .card-header,
    .card-footer {
        background: var(--white);
        border-color: var(--gray-light);
    }
    
    .table th {
        background: var(--light);
        color: var(--dark);
    }
    
    .table td {
        border-color: var(--gray-light);
        color: var(--dark);
    }
    
    .navbar-custom {
        background: var(--white);
    }
    
    .form-control,
    .form-select {
        background: var(--light);
        color: var(--dark);
        border-color: var(--gray-light);
    }
    
    .stat-card {
        background: var(--white);
    }
    
    .heatmap-card {
        background: var(--white);
        border-color: var(--gray-light);
    }
}

/* ==============================================
   Custom Scrollbar
   ============================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ==============================================
   Print Styles
   ============================================== */

@media print {
    .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    body {
        background: white !important;
    }
}