:root {
    --bg-color: #0f172a; /* Slate 900 */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-glow: rgba(59, 130, 246, 0.5);
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.15);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
}

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

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

/* Background Animations */
.background-elements {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s infinite alternate;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: #3b82f6;
    top: -100px;
    left: -100px;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: #8b5cf6;
    bottom: -150px;
    right: -100px;
    animation-delay: -5s;
}

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* UI Components */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

header {
    text-align: center;
}

header h1 {
    font-size: 2.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.grid-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }
}

.card h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.input-group {
    margin-bottom: 1.5rem;
}

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

input[type="text"], select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s;
    outline: none;
}

input[type="text"]:focus, select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-glow);
}

option {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

/* File Upload */
.drop-zone {
    border: 2px dashed var(--glass-border);
    border-radius: 12px;
    padding: 2.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(15, 23, 42, 0.4);
    margin-bottom: 1.5rem;
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
}

.drop-zone.has-file {
    border-color: var(--success);
    background: var(--success-bg);
}

.upload-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    opacity: 0.8;
}

.file-name {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--primary);
    word-break: break-all;
}

/* Buttons */
.action-panel {
    display: flex;
    justify-content: center;
}

.primary-btn {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.875rem 2.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.primary-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.primary-btn:active:not(:disabled) {
    transform: translateY(0px);
}

.primary-btn:disabled {
    background: #475569;
    box-shadow: none;
    cursor: not-allowed;
    opacity: 0.7;
}

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

.results-section {
    animation: slideUp 0.5s ease-out forwards;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.summary-card {
    text-align: center;
    margin-bottom: 2rem;
    background: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(15,23,42,0.9));
}

.score-value {
    font-size: 3.5rem;
    font-weight: 600;
    color: var(--success);
    line-height: 1;
    margin: 1rem 0;
}

.score-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    color: white;
    border: 1px solid var(--glass-border);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Table container styling */
.table-container {
    overflow-x: auto;
}

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

th {
    background: rgba(15, 23, 42, 0.8);
    padding: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--glass-border);
    white-space: nowrap;
}

td {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.cell-positive {
    background-color: var(--success-bg);
    color: var(--success);
    font-weight: 600;
}

.cell-negative {
    background-color: var(--danger-bg);
    color: var(--danger);
    font-weight: 600;
}

/* Footer */
.app-footer {
    text-align: center;
    padding-top: 1rem;
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
}