/* ============================================
   Statistiche Vendite - Import CSV
   Tema verde (analytics)
   ============================================ */

:root {
    --color-bg: #0d1210;
    --color-bg-card: #151d18;
    --color-surface: #1e2a24;
    
    --color-primary: #10b981;
    --color-primary-dim: #059669;
    --color-accent: #34d399;
    
    --color-text: #e8f0ec;
    --color-text-muted: #94a39e;
    --color-text-dim: #647870;
    
    --color-border: #2d3d35;
    --color-border-focus: #10b981;
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
    
    --font-sans: 'Outfit', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(16, 185, 129, 0.08), transparent),
        radial-gradient(ellipse 60% 40% at 100% 100%, rgba(52, 211, 153, 0.05), transparent);
    pointer-events: none;
    z-index: 0;
}

.app-container {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    margin-bottom: 2.5rem;
    text-align: center;
}

.back-link {
    display: inline-block;
    font-size: 0.9rem;
    color: var(--color-primary);
    text-decoration: none;
    margin-bottom: 1rem;
    transition: opacity var(--transition);
}

.back-link:hover {
    opacity: 0.8;
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--color-primary);
}

.logo h1 {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--color-primary);
    background: rgba(16, 185, 129, 0.05);
}
.upload-text { font-size: 0.95rem; color: var(--color-text-muted); }
.upload-link { color: var(--color-primary); text-decoration: underline; }
.upload-hint { font-size: 0.8rem; color: var(--color-text-dim); margin-top: 0.5rem; }
.config-hint { font-size: 0.85rem; color: var(--color-text-muted); margin-bottom: 1rem; }
.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.config-item label { display: block; font-size: 0.8rem; color: var(--color-text-dim); margin-bottom: 0.25rem; }
.config-item select {
    width: 100%;
    padding: 0.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.9rem;
}
.btn-analyze {
    padding: 0.75rem 1.5rem;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dim) 100%);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
}
.btn-analyze:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4); }
.report-header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.5rem; }
.report-actions { display: flex; gap: 0.5rem; }
.btn-export, .btn-print {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.35);
    border-radius: var(--radius-md);
    cursor: pointer;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.stat-box {
    padding: 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}
.stat-box .label { font-size: 0.8rem; color: var(--color-text-dim); margin-bottom: 0.25rem; }
.stat-box .value { font-family: var(--font-mono); font-size: 1.1rem; font-weight: 600; color: var(--color-primary); }
.stats-by-group { margin-bottom: 1.5rem; }
.stats-by-group h3 { font-size: 0.95rem; margin-bottom: 0.75rem; color: var(--color-text-muted); }
.group-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.group-table th, .group-table td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid var(--color-border); }
.group-table th { font-weight: 600; color: var(--color-text-muted); }
.group-table td:nth-child(2) { font-family: var(--font-mono); text-align: right; }
.data-preview h3 { font-size: 0.95rem; margin-bottom: 0.75rem; }
.table-wrapper { overflow-x: auto; max-height: 300px; overflow-y: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.data-table th, .data-table td { padding: 0.4rem 0.6rem; border-bottom: 1px solid var(--color-border); }
.data-table th { position: sticky; top: 0; background: var(--color-bg-card); font-weight: 600; color: var(--color-text-muted); }
.data-table td:nth-child(n+2) { font-family: var(--font-mono); text-align: right; }

.intro-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-md);
}

.intro-card p {
    margin: 0 0 0.5rem 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.intro-card .source {
    font-size: 0.8rem;
    color: var(--color-text-dim);
    margin-top: 0.75rem;
}

.intro-card a {
    color: var(--color-primary);
    text-decoration: none;
}

.intro-card a:hover {
    text-decoration: underline;
}

.upload-card,
.config-card,
.report-card,
.calculator-card,
.result-card,
.info-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
}

.upload-card h2,
.config-card h2,
.report-card h2 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}
.calculator-card .card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.norm-badge {
    font-size: 0.7rem;
    padding: 0.25rem 0.6rem;
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-primary);
    border-radius: 999px;
    font-weight: 500;
}

.calc-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.form-group input,
.form-group select {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    padding: 0.75rem 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a8c4' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-group input::placeholder {
    color: var(--color-text-dim);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.input-hint {
    font-size: 0.75rem;
    color: var(--color-text-dim);
}

.btn-calculate {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dim) 100%);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    margin-top: 0.5rem;
}

.btn-calculate:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

.result-card .result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.result-card h2 {
    font-size: 1.1rem;
    font-weight: 600;
}

.btn-print {
    padding: 0.5rem 0.9rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.35);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
}

.btn-print:hover {
    background: rgba(16, 185, 129, 0.25);
    border-color: var(--color-primary);
}

.result-value {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    line-height: 1.6;
}

.result-value.has-value {
    animation: pulse 0.5s ease;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.result-details {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    white-space: pre-line;
}

.result-note {
    margin-top: 1rem;
    padding: 0.75rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.result-note p {
    margin: 0;
}

.info-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.info-card p {
    margin: 0 0 0.5rem 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.info-card p:last-child {
    margin-bottom: 0;
}

.footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    .app-container { padding: 1.5rem 1rem; }
    .logo h1 { font-size: 1.2rem; }
}

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

@media print {
    body::before { display: none; }
    .upload-card, .config-card, .btn-export, .btn-print, .btn-analyze { display: none !important; }
    .result-card, .info-card { box-shadow: none; }
}