/* TradeFly - Premium Trading Platform UI */

:root {
    /* Modern color palette */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --success: #10b981;
    --success-light: #34d399;
    --danger: #ef4444;
    --danger-light: #f87171;
    --warning: #f59e0b;
    --info: #3b82f6;

    /* Dark theme */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --surface: #1e293b;
    --surface-hover: #334155;

    /* Text */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Borders */
    --border: #334155;
    --border-light: #475569;

    /* Shadows */
    --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.4);
    --shadow: 0 4px 12px -2px rgba(0, 0, 0, 0.5), 0 2px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.6), 0 6px 12px -4px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 24px 48px -8px rgba(0, 0, 0, 0.7), 0 12px 20px -6px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3), 0 0 40px rgba(99, 102, 241, 0.15);

    /* Animations */
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Navigation ===== */
.nav-bar {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 0;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.nav-brand:hover {
    color: var(--primary-light);
}

.nav-brand-icon {
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    gap: 0.25rem;
    list-style: none;
}

.nav-link {
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0.5rem;
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 70%;
    height: 2px;
    background: var(--primary);
    transition: transform 0.3s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-link:hover::after {
    transform: translateX(-50%) scaleX(1);
}

.nav-link.active {
    color: var(--primary-light);
    background: rgba(99, 102, 241, 0.15);
}

.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* ===== Main Content ===== */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2.5rem 2rem;
}

/* ===== Page Header ===== */
.page-header {
    margin-bottom: 2.5rem;
}

.page-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
}

/* ===== Cards ===== */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-xl);
    transform: translateY(-3px);
}

.card h2, .card h3 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.card h2 {
    font-size: 1.5rem;
}

.card h3 {
    font-size: 1.125rem;
}

/* ===== Signal Cards ===== */
.signal-card {
    background: linear-gradient(135deg, var(--surface) 0%, rgba(51, 65, 85, 0.8) 100%);
    border: 1px solid var(--border);
    border-radius: 0.875rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.signal-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--success));
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.signal-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-xl), var(--shadow-glow);
    transform: translateY(-4px) scale(1.01);
}

.signal-card:hover::before {
    transform: scaleX(1);
}

.signal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
}

.signal-symbol {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.signal-confidence, .match-badge {
    padding: 0.375rem 0.875rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.8125rem;
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
}

.confidence-high {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.3));
    color: var(--success-light);
    border: 1px solid rgba(16, 185, 129, 0.4);
}

.confidence-medium {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.3));
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.4);
}

.signal-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin: 1.25rem 0;
    padding: 1.25rem;
    background: rgba(15, 23, 42, 0.5);
    border-radius: 0.75rem;
    border: 1px solid var(--border);
}

.signal-detail {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.signal-detail-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.signal-detail-value {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}

/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--surface) 0%, rgba(51, 65, 85, 0.8) 100%);
    border: 1px solid var(--border);
    border-radius: 0.875rem;
    padding: 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    transform: translate(30%, -30%);
}

.stat-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(99, 102, 241, 0.2);
    transform: translateY(-5px) scale(1.02);
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-up {
    color: var(--success);
}

.stat-down {
    color: var(--danger);
}

/* ===== Buttons ===== */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-primary:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    transform: translateY(-1px);
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    color: white;
}

.btn-success:hover {
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
    transform: translateY(-1px);
}

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

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

.btn-danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
    color: white;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ===== Match Badges ===== */
.match-perfect {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.3));
    color: var(--success-light);
    border: 1px solid rgba(16, 185, 129, 0.5);
}

.match-good {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.3));
    color: var(--info);
    border: 1px solid rgba(59, 130, 246, 0.5);
}

.match-ok {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.3));
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.5);
}

.match-poor {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.3));
    color: var(--danger-light);
    border: 1px solid rgba(239, 68, 68, 0.5);
}

/* ===== Preference Cards (Settings) ===== */
.preference-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.25rem;
}

.preference-option {
    cursor: pointer;
}

.preference-option input[type="radio"] {
    display: none;
}

.preference-card {
    padding: 1.25rem;
    background: rgba(15, 23, 42, 0.5);
    border: 2px solid var(--border);
    border-radius: 0.75rem;
    transition: var(--transition);
    position: relative;
}

.preference-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 0.75rem;
    padding: 2px;
    background: linear-gradient(135deg, var(--primary), var(--success));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: var(--transition);
}

.preference-option:hover .preference-card {
    border-color: var(--primary);
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl), 0 0 25px rgba(99, 102, 241, 0.15);
}

.preference-option input[type="radio"]:checked + .preference-card {
    border-color: transparent;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
}

.preference-option input[type="radio"]:checked + .preference-card::before {
    opacity: 1;
}

.preference-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
    font-size: 1rem;
}

.preference-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.setting-section {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.setting-section:last-of-type {
    border-bottom: none;
}

/* ===== Loading & Empty States ===== */
.loading, .empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.4;
}

/* ===== Utility Classes ===== */
.text-success { color: var(--success-light); }
.text-danger { color: var(--danger-light); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-secondary); }
.text-primary { color: var(--text-primary); }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

/* ===== Animations ===== */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.signal-card, .stat-card {
    animation: slideIn 0.3s ease-out;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}