/* Design System */
:root {
    --bg-main: #0B0F19;
    --bg-card: rgba(17, 24, 39, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    
    --primary: #4F46E5;
    --primary-glow: rgba(79, 70, 229, 0.4);
    --secondary: #10B981;
    
    /* Buildup Colors */
    --color-long-buildup: #10B981; /* Green */
    --color-long-buildup-bg: rgba(16, 185, 129, 0.12);
    
    --color-short-buildup: #EF4444; /* Red */
    --color-short-buildup-bg: rgba(239, 68, 68, 0.12);
    
    --color-long-unwinding: #F59E0B; /* Orange */
    --color-long-unwinding-bg: rgba(245, 158, 11, 0.12);
    
    --color-short-covering: #06B6D4; /* Cyan */
    --color-short-covering-bg: rgba(6, 182, 212, 0.12);
    
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.5;
}

/* Background Blobs (Dynamic Aesthetic) */
.glass-bg-decor {
    position: absolute;
    border-radius: 50%;
    filter: blur(140px);
    z-index: -1;
    opacity: 0.45;
}
.decor-1 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #3b82f6 0%, transparent 70%);
    top: -100px;
    left: -100px;
}
.decor-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #6366f1 0%, transparent 70%);
    bottom: -150px;
    right: -100px;
}
.decor-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #10b981 0%, transparent 70%);
    top: 40%;
    left: 45%;
    transform: translate(-50%, -50%);
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.logo-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}
.logo-icon {
    width: 3.2rem;
    height: 3.2rem;
    background: linear-gradient(135deg, var(--primary), #818CF8);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}
.logo-icon i {
    width: 1.6rem;
    height: 1.6rem;
    color: white;
}
.app-header h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(to right, #FFFFFF, #E2E8F0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Status Badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
}
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}
.status-dot.green {
    background-color: var(--secondary);
    box-shadow: 0 0 10px var(--secondary);
}
.status-dot.yellow {
    background-color: var(--color-long-unwinding);
    box-shadow: 0 0 10px var(--color-long-unwinding);
}

/* Upload Grid */
.upload-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.dropzone-card {
    background: var(--bg-card);
    border: 2px dashed rgba(255, 255, 255, 0.15);
    border-radius: 16px;
    padding: 2.5rem 2rem;
    text-align: center;
    position: relative;
    cursor: pointer;
    overflow: hidden;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: all var(--transition-speed) ease;
}
.dropzone-card:hover {
    border-color: var(--primary);
    box-shadow: 0 12px 30px rgba(79, 70, 229, 0.15);
    transform: translateY(-2px);
}
.dropzone-card.dragover {
    border-color: var(--secondary);
    background: rgba(16, 185, 129, 0.05);
    box-shadow: 0 12px 30px rgba(16, 185, 129, 0.15);
}
.dropzone-card.success {
    border-color: var(--secondary);
    border-style: solid;
}
.file-input-hidden {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}
.dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    z-index: 2;
    position: relative;
}
.icon-wrapper {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed);
}
.dropzone-card:hover .icon-wrapper {
    transform: scale(1.1);
}
.icon-wrapper.prev-day i {
    color: #818CF8;
}
.icon-wrapper.today i {
    color: #F472B6;
}
.dropzone-content h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
}
.upload-instruction {
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.browse-btn {
    color: #818CF8;
    font-weight: 600;
    text-decoration: underline;
}
.file-spec {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.35);
    font-family: monospace;
}
.file-status {
    margin-top: 0.5rem;
}

/* Badges */
.badge {
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.badge-empty {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}
.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: #34D399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Config & Controls */
.config-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}
.config-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 1.5rem;
}
.config-sliders-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}
.slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.slider-label-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.slider-title {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.slider-title i {
    width: 14px;
    height: 14px;
    color: var(--primary);
}
.slider-badge {
    background: rgba(99, 102, 241, 0.15);
    color: #818CF8;
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: monospace;
}

/* Custom Styled Range Input */
.styled-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.08);
    outline: none;
    transition: background var(--transition-speed);
}
.styled-slider:hover {
    background: rgba(255, 255, 255, 0.12);
}
.styled-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #818CF8);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
    transition: transform var(--transition-speed), background var(--transition-speed);
}
.styled-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    background: linear-gradient(135deg, #6366F1, #A5B4FC);
}
.styled-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--primary), #818CF8);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.6);
    transition: transform var(--transition-speed), background var(--transition-speed);
}
.styled-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    background: linear-gradient(135deg, #6366F1, #A5B4FC);
}
.config-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
    min-width: 200px;
}
.config-item label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.config-item label i {
    width: 14px;
    height: 14px;
}
.styled-select, .styled-input {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    outline: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-speed);
}
.styled-select:focus, .styled-input:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 12px rgba(79, 70, 229, 0.2);
}
.styled-select option {
    background-color: var(--bg-main);
    color: var(--text-primary);
}
.expiry-info {
    flex: 0 1 auto;
    min-width: auto;
    padding-bottom: 0.75rem;
}
.info-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.info-value {
    font-size: 0.9375rem;
    font-weight: 700;
    color: #F472B6;
    font-family: monospace;
}
.config-actions {
    display: flex;
    gap: 0.75rem;
    align-self: flex-end;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    border: none;
    outline: none;
}
.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), #6366F1);
    color: white;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Metrics Dashboard */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
}
.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: relative;
    overflow: hidden;
}
.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}
.metric-icon {
    width: 2.8rem;
    height: 2.8rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.04);
}
.metric-icon i {
    width: 1.3rem;
    height: 1.3rem;
}
.metric-details {
    display: flex;
    flex-direction: column;
}
.metric-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.metric-value {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.2;
    margin: 0.1rem 0;
}
.metric-sub {
    font-size: 0.6875rem;
    color: rgba(255, 255, 255, 0.3);
}

/* Metric Colors */
.metric-card.total::before { background-color: var(--primary); }
.metric-card.total i { color: #818CF8; }

.metric-card.buildup-long::before { background-color: var(--color-long-buildup); }
.metric-card.buildup-long i { color: var(--color-long-buildup); }
.metric-card.buildup-long .metric-value { color: var(--color-long-buildup); }

.metric-card.buildup-short::before { background-color: var(--color-short-buildup); }
.metric-card.buildup-short i { color: var(--color-short-buildup); }
.metric-card.buildup-short .metric-value { color: var(--color-short-buildup); }

.metric-card.unwind-long::before { background-color: var(--color-long-unwinding); }
.metric-card.unwind-long i { color: var(--color-long-unwinding); }
.metric-card.unwind-long .metric-value { color: var(--color-long-unwinding); }

.metric-card.cover-short::before { background-color: var(--color-short-covering); }
.metric-card.cover-short i { color: var(--color-short-covering); }
.metric-card.cover-short .metric-value { color: var(--color-short-covering); }

/* Main Table Container */
.table-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}
.table-container-outer {
    display: flex;
    flex-direction: column;
}
.table-header-sticky {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(11, 15, 25, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    flex-wrap: wrap;
    gap: 1rem;
}
.table-meta-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.table-meta-info span {
    color: var(--text-primary);
    font-weight: 700;
}
.table-legend {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.legend-item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
}
.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.legend-dot.long { background-color: var(--color-long-buildup); }
.legend-dot.short { background-color: var(--color-short-buildup); }
.legend-dot.unwind { background-color: var(--color-long-unwinding); }
.legend-dot.cover { background-color: var(--color-short-covering); }

/* Responsive Table */
.table-responsive {
    max-height: 600px;
    overflow-y: auto;
    position: relative;
}
.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.875rem;
}
.data-table th {
    position: sticky;
    top: 0;
    background: #111827;
    z-index: 10;
    padding: 1rem 1.25rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    user-select: none;
}
.data-table th.sortable {
    cursor: pointer;
}
.data-table th.sortable:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.02);
}
.data-table th.sortable i {
    width: 12px;
    height: 12px;
    margin-left: 0.2rem;
    display: inline-block;
    vertical-align: middle;
}
.data-table td {
    padding: 0.875rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}
.data-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}
.data-table tbody tr.buildup-row-long {
    background-color: rgba(16, 185, 129, 0.025);
}
.data-table tbody tr.buildup-row-long:hover {
    background-color: rgba(16, 185, 129, 0.05);
}
.data-table tbody tr.buildup-row-short {
    background-color: rgba(239, 68, 68, 0.025);
}
.data-table tbody tr.buildup-row-short:hover {
    background-color: rgba(239, 68, 68, 0.05);
}
.data-table tbody tr.buildup-row-unwind {
    background-color: rgba(245, 158, 11, 0.025);
}
.data-table tbody tr.buildup-row-unwind:hover {
    background-color: rgba(245, 158, 11, 0.05);
}
.data-table tbody tr.buildup-row-cover {
    background-color: rgba(6, 182, 212, 0.025);
}
.data-table tbody tr.buildup-row-cover:hover {
    background-color: rgba(6, 182, 212, 0.05);
}

.text-right {
    text-align: right;
}
.spacer-col {
    width: 20px;
    padding: 0 !important;
    background: rgba(255, 255, 255, 0.015);
    border-left: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
}

/* Dynamic styling for table items */
.instrument-name {
    font-weight: 700;
    font-family: monospace;
    font-size: 0.9rem;
    color: #FFFFFF;
}
.val-positive {
    color: var(--secondary);
    font-weight: 600;
}
.val-negative {
    color: #F87171;
    font-weight: 600;
}
.badge-table {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    font-family: monospace;
    text-align: center;
}
.badge-table.long {
    background-color: var(--color-long-buildup-bg);
    color: var(--color-long-buildup);
}
.badge-table.short {
    background-color: var(--color-short-buildup-bg);
    color: var(--color-short-buildup);
}
.badge-table.unwind {
    background-color: var(--color-long-unwinding-bg);
    color: var(--color-long-unwinding);
}
.badge-table.cover {
    background-color: var(--color-short-covering-bg);
    color: var(--color-short-covering);
}
.badge-table.zero {
    color: rgba(255, 255, 255, 0.25);
}

/* Custom Scrollbar */
.table-responsive::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
.table-responsive::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.01);
}
.table-responsive::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
.table-responsive::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Placeholder */
.placeholder-state {
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: 16px;
    padding: 4rem 2rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}
.placeholder-illustration {
    width: 5rem;
    height: 5rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.5rem;
}
.placeholder-illustration i {
    width: 2.2rem;
    height: 2.2rem;
    color: var(--text-secondary);
}
.placeholder-state h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
}
.placeholder-state p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    max-width: 400px;
}

/* Utility Hidden */
.hidden {
    display: none !important;
}

/* Responsive adjustments */
@media (max-width: 900px) {
    .config-row {
        flex-direction: column;
        align-items: stretch;
    }
    .config-item {
        width: 100%;
    }
    .config-actions {
        width: 100%;
    }
    .config-actions .btn {
        flex: 1;
    }
}