/* =====================================================
   Calcolo Fattura Avvocato - Public Styles
   Professional Legal Financial Calculator
   ===================================================== */

/* Custom Properties */
.cfa-wrap {
    --cfa-primary: #1a3a5c;
    --cfa-accent: #c9a84c;
    --cfa-bg: #ffffff;
    --cfa-surface: #f8f9fc;
    --cfa-border: #e2e8f0;
    --cfa-text: #1a202c;
    --cfa-muted: #718096;
    --cfa-success: #27ae60;
    --cfa-danger: #e74c3c;
    --cfa-btn-radius: 50px;
    --cfa-radius: 12px;
    --cfa-shadow: 0 4px 24px rgba(26,58,92,0.12);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    color: var(--cfa-text);
    line-height: 1.6;
}

/* Layout Variants */
.cfa-layout-boxed {
    max-width: 860px;
    margin: 0 auto;
    border: 1px solid var(--cfa-border);
    border-radius: var(--cfa-radius);
    overflow: hidden;
    box-shadow: var(--cfa-shadow);
}

.cfa-layout-full-width { width: 100%; }
.cfa-layout-minimal { max-width: 700px; margin: 0 auto; }

/* Header */
.cfa-header {
    background: linear-gradient(135deg, var(--cfa-primary) 0%, color-mix(in srgb, var(--cfa-primary) 70%, #000) 100%);
    color: #fff;
    padding: 32px 36px;
    position: relative;
    overflow: hidden;
}
.cfa-header::before {
    content: '⚖️';
    position: absolute;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 64px;
    opacity: 0.15;
}
.cfa-title {
    font-size: clamp(20px, 3vw, 26px);
    font-weight: 800;
    margin: 0 0 6px !important;
    letter-spacing: -0.3px;
    color: #fff !important;
}
.cfa-subtitle {
    margin: 0 !important;
    opacity: 0.85;
    font-size: 14px;
    color: rgba(255,255,255,0.9) !important;
}

/* Version Tabs */
.cfa-version-tabs {
    display: flex;
    background: var(--cfa-surface);
    border-bottom: 1px solid var(--cfa-border);
    padding: 0;
}
.cfa-tab-btn {
    flex: 1;
    padding: 16px 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--cfa-muted);
    border-bottom: 3px solid transparent;
    margin-bottom: -1px;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.cfa-tab-btn:hover { color: var(--cfa-primary); background: rgba(26,58,92,0.04); }
.cfa-tab-btn.active {
    color: var(--cfa-primary);
    border-bottom-color: var(--cfa-accent);
    background: var(--cfa-bg);
}
.cfa-tab-icon { font-size: 16px; }

/* Version Panels */
.cfa-version-panel { display: none; padding: 28px 32px; background: var(--cfa-bg); }
.cfa-version-panel.active { display: block; animation: cfaFadeIn 0.3s ease; }

@keyframes cfaFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Section */
.cfa-section { margin-bottom: 24px; }
.cfa-section-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--cfa-muted);
    margin: 0 0 14px !important;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}
.cfa-section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--cfa-border);
}

/* Form Grid */
.cfa-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 18px;
    margin-bottom: 0;
}

/* Field */
.cfa-field { display: flex; flex-direction: column; gap: 7px; }
.cfa-field label {
    font-size: 12px;
    font-weight: 700;
    color: var(--cfa-muted);
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

/* Input */
.cfa-input-wrap { position: relative; display: flex; align-items: center; }
.cfa-prefix, .cfa-suffix {
    position: absolute;
    font-size: 13px;
    color: var(--cfa-muted);
    font-weight: 600;
    pointer-events: none;
}
.cfa-prefix { left: 12px; }
.cfa-suffix { right: 12px; }

.cfa-input {
    width: 100%;
    border: 1.5px solid var(--cfa-border) !important;
    border-radius: 8px !important;
    padding: 11px 14px !important;
    font-size: 15px !important;
    font-family: inherit !important;
    color: var(--cfa-text) !important;
    background: var(--cfa-bg) !important;
    transition: all 0.2s !important;
    box-shadow: none !important;
    -webkit-appearance: none;
}
.cfa-input-wrap .cfa-input { padding-left: 30px !important; }
.cfa-perc-wrap .cfa-input { padding-right: 30px !important; }
.cfa-input:focus {
    border-color: var(--cfa-primary) !important;
    outline: none !important;
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--cfa-primary) 15%, transparent) !important;
}
.cfa-input:disabled { background: var(--cfa-surface) !important; opacity: 0.6; }

/* Locked toggle-row: visual grey state (overlay in JS blocks interaction) */
.cfa-toggle-row.cfa-locked .cfa-input,
.cfa-toggle-row.cfa-locked input:not([type=checkbox]) {
    background: #eef0f4 !important;
    color: #aab0bc !important;
    border-color: #dde1e9 !important;
    box-shadow: none !important;
}
.cfa-toggle-row.cfa-locked .cfa-badge { opacity: 0.4 !important; }
.cfa-toggle-row.cfa-locked .cfa-prefix,
.cfa-toggle-row.cfa-locked .cfa-suffix { color: #aab0bc !important; }
/* The overlay div injected by JS */
.cfa-lock-overlay { user-select: none; -webkit-user-select: none; }

/* Toggle */
.cfa-toggle-row { display: flex; align-items: center; gap: 10px; }
.cfa-toggle { position: relative; display: inline-block; width: 44px; height: 24px; flex-shrink: 0; }
.cfa-toggle input { opacity: 0; width: 0; height: 0; }
.cfa-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: #d1d5db;
    border-radius: 34px;
    transition: 0.3s;
}
.cfa-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: #fff;
    border-radius: 50%;
    transition: 0.3s;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.cfa-toggle input:checked + .cfa-slider { background: var(--cfa-primary); }
.cfa-toggle input:checked + .cfa-slider::before { transform: translateX(20px); }
.cfa-toggle-inline { margin-right: 8px; }

.cfa-badge {
    background: var(--cfa-surface);
    border: 1px solid var(--cfa-border);
    border-radius: 20px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 700;
    color: var(--cfa-primary);
}
.cfa-perc-wrap { flex: 1; }

/* Regime Selector */
.cfa-regime-selector { display: flex; gap: 12px; }
.cfa-regime-option { cursor: pointer; flex: 1; }
.cfa-regime-option input { display: none; }
.cfa-regime-card {
    display: block;
    border: 2px solid var(--cfa-border);
    border-radius: 10px;
    padding: 14px 16px;
    transition: all 0.2s;
    background: var(--cfa-bg);
}
.cfa-regime-card strong { display: block; font-size: 14px; color: var(--cfa-text); }
.cfa-regime-card small { font-size: 11px; color: var(--cfa-muted); margin-top: 2px; display: block; }
.cfa-regime-option input:checked + .cfa-regime-card {
    border-color: var(--cfa-primary);
    background: color-mix(in srgb, var(--cfa-primary) 5%, transparent);
}
.cfa-regime-option:hover .cfa-regime-card { border-color: var(--cfa-accent); }

/* Hint */
.cfa-hint { font-size: 12px; color: var(--cfa-muted); margin: 0 0 12px; padding: 8px 12px; background: #fff8e1; border-radius: 6px; border-left: 3px solid var(--cfa-accent); }

/* Reverse section */
.cfa-reverse-section .cfa-section-title { cursor: default; }
.cfa-reverse-fields { margin-top: 12px; animation: cfaFadeIn 0.2s ease; }

/* Actions */
.cfa-actions { display: flex; gap: 12px; margin-top: 24px; align-items: center; }
.cfa-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--cfa-btn-radius);
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    transition: all 0.25s;
    text-decoration: none;
    letter-spacing: 0.3px;
}
.cfa-btn-primary {
    background: var(--cfa-primary);
    color: #fff;
    box-shadow: 0 4px 14px color-mix(in srgb, var(--cfa-primary) 40%, transparent);
}
.cfa-btn-primary:hover {
    background: color-mix(in srgb, var(--cfa-primary) 85%, #000);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px color-mix(in srgb, var(--cfa-primary) 50%, transparent);
}
.cfa-btn-secondary {
    background: var(--cfa-surface);
    color: var(--cfa-text);
    border: 1.5px solid var(--cfa-border);
}
.cfa-btn-secondary:hover { background: var(--cfa-border); }
.cfa-btn-pdf {
    background: var(--cfa-accent);
    color: #fff;
    box-shadow: 0 4px 14px color-mix(in srgb, var(--cfa-accent) 40%, transparent);
}
.cfa-btn-pdf:hover { background: color-mix(in srgb, var(--cfa-accent) 85%, #000); transform: translateY(-1px); }
.cfa-btn-icon { font-size: 16px; }

/* Result Panel */
.cfa-result-panel {
    border-top: 1px solid var(--cfa-border);
    animation: cfaFadeIn 0.4s ease;
}
.cfa-results { padding: 28px 32px; }
.cfa-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.cfa-results-header h3 { font-size: 18px; margin: 0 !important; color: var(--cfa-primary); }
.cfa-btn-close {
    background: var(--cfa-surface);
    border: 1px solid var(--cfa-border);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--cfa-muted);
    transition: all 0.2s;
}
.cfa-btn-close:hover { background: var(--cfa-danger); color: #fff; border-color: var(--cfa-danger); }

/* Summary Cards */
.cfa-summary-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 24px;
}
.cfa-card {
    padding: 20px;
    border-radius: 10px;
    text-align: center;
}
.cfa-card-total {
    background: var(--cfa-primary);
    color: #fff;
}
.cfa-card-netto {
    background: var(--cfa-accent);
    color: #fff;
}
.cfa-card-label { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; opacity: 0.85; display: block; margin-bottom: 6px; }
.cfa-card-value { font-size: clamp(18px, 3vw, 24px); font-weight: 800; display: block; font-variant-numeric: tabular-nums; }

/* Breakdown Table */
.cfa-breakdown h4 { font-size: 13px; color: var(--cfa-muted); text-transform: uppercase; letter-spacing: 1px; margin: 0 0 12px !important; }
.cfa-breakdown-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.cfa-breakdown-table td { padding: 10px 12px; border-bottom: 1px solid var(--cfa-border); }
.cfa-breakdown-table td:last-child { text-align: right; font-family: 'Courier New', monospace; font-weight: 600; min-width: 110px; }
.cfa-breakdown-table tr:last-child td { border-bottom: none; }
.cfa-subtotal td { background: var(--cfa-surface); font-weight: 700; }
.cfa-total-row td { background: color-mix(in srgb, var(--cfa-primary) 8%, transparent); font-size: 15px; }
.cfa-netto-row td { background: color-mix(in srgb, var(--cfa-accent) 10%, transparent); font-size: 15px; color: color-mix(in srgb, var(--cfa-accent) 80%, #000); }

.cfa-regime-badge-wrap { margin-top: 10px; text-align: center; }
.cfa-regime-badge {
    display: inline-block;
    background: var(--cfa-primary);
    color: #fff;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Results Footer */
.cfa-results-footer {
    margin-top: 20px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    padding-top: 20px;
    border-top: 1px solid var(--cfa-border);
}

/* Loading overlay */
.cfa-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 600px) {
    .cfa-version-panel { padding: 20px 18px; }
    .cfa-results { padding: 20px 18px; }
    .cfa-header { padding: 24px 20px; }
    .cfa-form-grid { grid-template-columns: 1fr; }
    .cfa-summary-cards { grid-template-columns: 1fr; }
    .cfa-regime-selector { flex-direction: column; }
    .cfa-actions { flex-wrap: wrap; }
    .cfa-btn { width: 100%; justify-content: center; }
    .cfa-results-footer { flex-direction: column; }
    .cfa-header::before { display: none; }
}

@media (max-width: 400px) {
    .cfa-version-tabs { flex-direction: column; }
    .cfa-tab-btn { border-bottom: none; border-right: 3px solid transparent; }
    .cfa-tab-btn.active { border-right-color: var(--cfa-accent); }
}