:root {
    --bg-main: #0B0E14;
    --bg-panel: rgba(18, 23, 31, 0.6);
    --bg-card: rgba(26, 33, 45, 0.7);
    --bg-secondary: #1F2937;
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(255, 255, 255, 0.15);
    
    --accent: #3B82F6;
    --accent-hover: #2563EB;
    
    --success: #10B981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --danger: #EF4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --warning: #F59E0B;
    --warning-bg: rgba(245, 158, 11, 0.15);

    --tier-a: #10B981;
    --tier-b: #84CC16;
    --tier-c: #EAB308;
    --tier-d: #F97316;
    --tier-e: #EF4444;

    --font-sans: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

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

/* Ambient Background */
.ambient-bg {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
    animation: float 20s infinite ease-in-out alternate;
}
.orb-1 { width: 500px; height: 500px; background: #3B82F6; top: -100px; left: -100px; }
.orb-2 { width: 400px; height: 400px; background: #10B981; bottom: 10%; right: -50px; animation-delay: -5s; opacity: 0.1; }
.orb-3 { width: 300px; height: 300px; background: #8B5CF6; top: 30%; left: 40%; animation-delay: -10s; opacity: 0.1; }

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 30px) scale(1.1); }
}

/* Layout Container */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Header & Nav */
.header {
    background: var(--bg-panel);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 20px 24px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}
.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.logo-section {
    display: flex;
    align-items: center;
    gap: 16px;
}
.logo-icon {
    font-size: 2rem;
    background: linear-gradient(135deg, #3B82F6, #8B5CF6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}
.subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.tabs-nav {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 1px;
}
.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}
.tab-btn:hover:not(:disabled) {
    color: var(--text-primary);
}
.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}
.tab-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Main Content */
.main-content {
    position: relative;
    min-height: 500px;
}
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-out;
}
.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.split-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* Panels */
.controls-panel, .results-panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 24px;
    backdrop-filter: blur(12px);
}
.panel-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.section-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* Forms & Inputs */
.grid-2-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3-col { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }

.control-group { margin-bottom: 16px; position: relative;}
.control-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}
select, input[type="number"] {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: border-color 0.2s;
    outline: none;
}
select:focus, input:focus {
    border-color: var(--accent);
}

.w-100 { width: 100%; }
.tiny-input { width: 70px; padding: 4px; border-radius: 4px; text-align: right; }

.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--border-glass);
    border-radius: 3px;
    outline: none;
    margin: 8px 0;
}
.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--success);
    cursor: pointer;
    transition: transform 0.1s;
}
.slider.slider-danger::-webkit-slider-thumb { background: var(--danger); }
.slider.slider-blue::-webkit-slider-thumb { background: var(--accent); }
.slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
.val-display { font-family: var(--font-mono); font-size: 0.9rem; float: right; margin-top: -24px;}
.control-hint { font-size: 0.75rem; color: var(--text-secondary); margin-top: 4px; }

/* Scorecard UI */
.score-card {
    text-align: center;
    padding: 30px;
    background: var(--bg-card);
    border-radius: 12px;
    border: 1px solid var(--border-glass);
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}
.score-header { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 10px; }
.score-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border: 8px solid;
    transition: border-color 0.5s ease;
}
.score-value { font-size: 3rem; font-weight: 800; font-family: var(--font-mono); }
.score-label { font-size: 0.8rem; color: var(--text-secondary); }

.tier-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 15px;
}
.tier-A { background: rgba(16, 185, 129, 0.2); color: var(--tier-a); }
.tier-B { background: rgba(132, 204, 22, 0.2); color: var(--tier-b); }
.tier-C { background: rgba(234, 179, 8, 0.2); color: var(--tier-c); }
.tier-D { background: rgba(249, 115, 22, 0.2); color: var(--tier-d); }
.tier-E { background: rgba(239, 68, 68, 0.2); color: var(--tier-e); }

.decision-box {
    margin-top: 20px;
    padding: 16px;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    border: 1px solid;
}
.decision-box.pending { background: var(--bg-card); border-color: var(--border-glass); color: var(--text-secondary); }
.decision-box.approved { background: var(--success-bg); border-color: var(--success); color: var(--success); }
.decision-box.rejected { background: var(--danger-bg); border-color: var(--danger); color: var(--danger); }

/* Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}
.small-grid { grid-template-columns: 1fr 1fr; }
.metric-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 16px;
}
.metric-label { font-size: 0.8rem; color: var(--text-secondary); margin-bottom: 8px; }
.metric-value { font-size: 1.5rem; font-weight: 700; font-family: var(--font-mono); }
.metric-sub { font-size: 0.75rem; color: var(--text-secondary); margin-top: 4px; }
.metric-highlight { background: linear-gradient(180deg, rgba(59, 130, 246, 0.1) 0%, rgba(59, 130, 246, 0.0) 100%); border-color: rgba(59, 130, 246, 0.3); }
.metric-danger { background: linear-gradient(180deg, rgba(239, 68, 68, 0.1) 0%, rgba(239, 68, 68, 0.0) 100%); border-color: rgba(239, 68, 68, 0.3); }

.indicator-pd { color: #3B82F6; }
.indicator-danger { color: var(--danger); }
.indicator-neutral { color: var(--success); }

/* Table */
.data-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.data-table th, .data-table td { padding: 10px; text-align: left; border-bottom: 1px solid var(--border-glass); }
.data-table th { color: var(--text-secondary); font-weight: 500; }
.data-table tr:hover td { background: rgba(255,255,255,0.02); }

/* Buttons */
.run-btn {
    width: 100%;
    padding: 16px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all 0.2s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}
.run-btn:hover { background: var(--accent-hover); transform: translateY(-1px); }
.run-btn:active { transform: translateY(1px); }

.pulse-dot { width: 8px; height: 8px; background: white; border-radius: 50%; display: inline-block; animation: pulse 2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7); } 70% { box-shadow: 0 0 0 6px rgba(255, 255, 255, 0); } 100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); } }

/* Charts */
.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 16px;
}
.chart-title { font-size: 0.9rem; font-weight: 500; margin-bottom: 12px; color: var(--text-secondary); }
.chart-container { position: relative; width: 100%; }
.chart-meta { font-size: 0.8rem; color: var(--text-secondary); text-align: right; margin-top: 8px; font-family: var(--font-mono); }

/* Progress bar */
.sim-progress-bar { width: 100%; height: 4px; background: var(--bg-secondary); border-radius: 2px; overflow: hidden; }
.sim-progress { height: 100%; background: var(--success); width: 0%; transition: width 0.3s; }

.list-factors ul { padding-left: 16px; margin-top: 4px; font-size:0.75rem;}
.list-factors li { margin-bottom: 2px; }
.pos-impact { color: var(--success); }
.neg-impact { color: var(--danger); }