/* ═══════════════════════════════════════════════════════════════
   INVOICE GENERATOR STYLES
   Dark theme con paleta profesional oscura
   ═══════════════════════════════════════════════════════════════ */

:root {
    --lime-primary: #c4d600;
    --lime-light: #dceb50;
    --gold-accent: #ffd700;
}

.invoice-container {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease-in;
    background: var(--bg-primary);
    min-height: 100vh;
}

/* ─────────────────────────────────────────────────────────────
   HEADER Y BADGES
   ───────────────────────────────────────────────────────────── */

.invoice-header-premium {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-radius: 16px;
    padding: 2.5rem;
    margin-bottom: 2rem;
    border-left: 6px solid var(--lime-primary);
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--border);
}

.invoice-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(196, 214, 0, 0.15);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    margin-bottom: 1rem;
    font-weight: 600;
    color: var(--lime-primary);
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    border: 1px solid rgba(196, 214, 0, 0.3);
}

.invoice-icon {
    font-size: 1.2rem;
}

.invoice-main-title {
    font-size: 2.5rem;
    margin: 1rem 0 0.5rem 0;
    color: var(--text-primary);
    font-weight: 800;
    letter-spacing: -1px;
}

.premium-gradient {
    background: linear-gradient(135deg, var(--lime-primary) 0%, var(--lime-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 900;
}

.invoice-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0;
    font-weight: 400;
}

/* ─────────────────────────────────────────────────────────────
   FORMULARIO
   ───────────────────────────────────────────────────────────── */

.invoice-form-section {
    background: var(--bg-glass);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    border: var(--glass-border);
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-soft);
}

.invoice-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    border-bottom: 2px solid var(--border);
    padding-bottom: 1rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tabs-list {
    display: flex;
    gap: 0.5rem;
    flex-wrap: nowrap;
    width: 100%;
    overflow-x: auto;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    border-radius: 0;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-muted);
    transition: all 0.3s ease;
    font-size: 0.95rem;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--lime-primary);
    border-bottom-color: var(--lime-primary);
    transform: translateY(-2px);
}

.tab-btn.active {
    color: var(--lime-primary);
    border-bottom-color: var(--lime-primary);
    box-shadow: 0 4px 12px rgba(196, 214, 0, 0.2);
}

.form-section {
    margin-bottom: 2.5rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.form-section:last-child {
    border-bottom: none;
}

.form-section-title {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

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

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

.form-group label {
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 0.8rem 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--lime-primary);
    box-shadow: 0 0 20px rgba(196, 214, 0, 0.3);
    background: rgba(255, 255, 255, 0.12);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
    font-family: 'Inter', sans-serif;
}

/* ─────────────────────────────────────────────────────────────
   SERVICIOS
   ───────────────────────────────────────────────────────────── */

#invoiceServicesContainer {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.service-item {
    background: rgba(255, 255, 255, 0.06);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid var(--lime-primary);
    border: 1px solid var(--border);
    position: relative;
}

.service-item .form-grid {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.btn-group-small {
    display: flex;
    justify-content: flex-end;
}

.btn-danger-sm {
    padding: 0.6rem 1rem;
    font-size: 0.85rem;
}

/* ─────────────────────────────────────────────────────────────
   BOTONES
   ───────────────────────────────────────────────────────────── */

.btn-group {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.action-buttons {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border);
}

/* ─────────────────────────────────────────────────────────────
   PREVIEW
   ───────────────────────────────────────────────────────────── */

.invoice-preview-section {
    background: var(--bg-glass);
    border-radius: 12px;
    padding: 2rem;
    border: var(--glass-border);
    backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-soft);
}

.premium-title {
    background: linear-gradient(135deg, var(--lime-primary) 0%, var(--lime-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.preview-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.invoice-preview-content {
    min-height: 300px;
}

.empty-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    color: var(--text-muted);
    gap: 1rem;
    text-align: center;
}

.preview-icon {
    font-size: 3rem;
    opacity: 0.3;
}

.invoice-preview {
    background: var(--bg-secondary);
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.invoice-header {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--lime-primary);
}

.invoice-logo {
    background: linear-gradient(135deg, var(--lime-primary), var(--lime-light));
    color: #000;
    width: 80px;
    height: 80px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 0 20px rgba(196, 214, 0, 0.3);
}

.logo-placeholder {
    color: #000;
    font-weight: 800;
}

.invoice-title-block h1 {
    margin: 0;
    font-size: 1.8rem;
    color: var(--text-primary);
}

.invoice-title-block p {
    margin: 0.25rem 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.invoice-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.invoice-info {
    padding: 1rem;
    background: rgba(196, 214, 0, 0.08);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.invoice-no, .invoice-date, .invoice-due {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.invoice-client {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.invoice-client h3 {
    margin: 0 0 0.5rem 0;
    color: var(--lime-primary);
    font-size: 0.95rem;
    font-weight: 700;
}

.invoice-client p {
    margin: 0.3rem 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.invoice-table thead {
    background: linear-gradient(135deg, var(--lime-primary), var(--lime-light));
    color: #000;
}

.invoice-table th {
    padding: 0.75rem;
    text-align: left;
    font-weight: 700;
    font-size: 0.85rem;
    border-bottom: 2px solid var(--lime-primary);
}

.invoice-table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    text-align: right;
    color: var(--text-primary);
}

.invoice-table td:first-child {
    text-align: left;
}

.invoice-table tbody tr:nth-child(even) {
    background: rgba(196, 214, 0, 0.05);
}

.invoice-totals {
    display: flex;
    justify-content: flex-end;
    margin: 2rem 0;
}

.total-row {
    display: flex;
    justify-content: space-between;
    gap: 3rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    padding: 1rem 2rem;
    background: rgba(196, 214, 0, 0.1);
    border-radius: 6px;
    border: 1px solid var(--border);
}

.grand-total {
    background: linear-gradient(135deg, rgba(196, 214, 0, 0.2), rgba(196, 214, 0, 0.1));
    border: 1px solid var(--lime-primary);
    color: var(--lime-primary);
    font-size: 1.2rem;
}

.invoice-footer {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.invoice-footer strong {
    color: var(--lime-primary);
}

/* ─────────────────────────────────────────────────────────────
   RESPONSIVE
   ───────────────────────────────────────────────────────────── */

@media (max-width: 768px) {
    .invoice-container {
        padding: 1rem;
    }

    .invoice-header-premium {
        padding: 1.5rem;
    }

    .invoice-main-title {
        font-size: 1.8rem;
    }

    .invoice-form-section,
    .invoice-preview-section {
        padding: 1rem;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .invoice-details {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .btn-group {
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .btn-group .btn {
        flex: 1;
        min-width: 140px;
    }

    .invoice-table {
        font-size: 0.75rem;
    }

    .invoice-table th,
    .invoice-table td {
        padding: 0.5rem 0.3rem;
    }

    .total-row {
        gap: 1rem;
        font-size: 0.9rem;
        padding: 0.8rem 1.5rem;
    }

    .invoice-header {
        flex-direction: column;
        gap: 1rem;
    }

    .invoice-logo {
        width: 60px;
        height: 60px;
        font-size: 1.2rem;
    }
}

/* ─────────────────────────────────────────────────────────────
   ANIMACIONES
   ───────────────────────────────────────────────────────────── */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 480px) {
    .invoice-main-title {
        font-size: 1.5rem;
    }

    .invoice-subtitle {
        font-size: 0.9rem;
    }

    .form-section-title {
        font-size: 1rem;
    }

    .service-item {
        padding: 1rem;
    }

    .invoice-table {
        font-size: 0.7rem;
    }
}