/* ============================================================
   INVENTARIO - Estilos específicos para la página de inventario
   Usa las mismas variables y tipografía que style.css principal
   ============================================================ */

/* --- LOGIN SCREEN --- */
.inv-login-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--bg-body);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.inv-login-card {
    background: var(--inv-card-bg);
    border: 1px solid var(--inv-border);
    border-radius: 16px;
    padding: 40px 35px;
    max-width: 380px;
    width: 100%;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.inv-login-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(214, 61, 70, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--inv-accent);
}

.inv-login-card h2 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    color: var(--inv-text);
    margin-bottom: 8px;
}

.inv-login-card > p {
    color: var(--inv-gray);
    font-size: 0.9rem;
    margin-bottom: 25px;
}

.inv-login-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.inv-login-form input {
    padding: 12px 16px;
    border: 1px solid var(--inv-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    background-color: var(--inv-input-bg);
    color: var(--inv-text);
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
    text-align: center;
    letter-spacing: 2px;
}

.inv-login-form input:focus {
    border-color: var(--inv-accent);
    box-shadow: 0 0 0 3px rgba(214, 61, 70, 0.1);
}

.inv-login-form input::placeholder {
    letter-spacing: normal;
    color: var(--inv-gray);
}

.inv-login-form .btn {
    padding: 12px 25px;
    font-size: 1rem;
}

.inv-login-error {
    color: var(--inv-danger);
    font-size: 0.85rem;
    margin-top: 15px;
    display: none;
}

.inv-login-error.visible {
    display: block;
}

.inv-login-loading {
    color: var(--inv-gray);
    font-size: 0.85rem;
    margin-top: 15px;
    display: none;
}

.inv-login-loading.visible {
    display: block;
}

.btn-google-login {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 12px 25px;
    background: #fff;
    border: 1px solid #dadce0;
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: #3c4043;
    cursor: pointer;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.btn-google-login:hover {
    background-color: #f8f9fa;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.btn-google-login svg {
    flex-shrink: 0;
}

[data-theme="dark"] .btn-google-login {
    background: #1e1e1e;
    border-color: #444;
    color: #e8eaed;
}

[data-theme="dark"] .btn-google-login:hover {
    background: #2d2d2d;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(8px); }
    60% { transform: translateX(-5px); }
    80% { transform: translateX(5px); }
}

/* --- Variables del inventario (hereda las de style.css) --- */
:root {
    --inv-accent: var(--primary-red);
    --inv-accent-hover: var(--primary-red-hover);
    --inv-bg: var(--bg-body);
    --inv-text: var(--color-body);
    --inv-gray: var(--text-gray);
    --inv-border: var(--input-border);
    --inv-input-bg: var(--input-bg);
    --inv-card-bg: var(--input-bg);
    --inv-success: #22c55e;
    --inv-warning: #f59e0b;
    --inv-danger: #ef4444;
    --inv-info: #3b82f6;
}

/* --- Nav active link --- */
.nav-links .nav-active {
    color: var(--inv-accent) !important;
    border-bottom-color: var(--inv-accent) !important;
}

/* --- Inv Hero --- */
.inv-hero {
    text-align: center;
    padding: 60px 5% 40px;
}

.inv-hero h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    color: var(--inv-text);
    margin-bottom: 10px;
}

.inv-hero .accent {
    color: var(--inv-accent);
}

.inv-hero > p {
    color: var(--inv-gray);
    font-size: 1rem;
    max-width: 500px;
    margin: 0 auto 35px;
}

.inv-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.inv-stat {
    text-align: center;
    min-width: 80px;
}

.inv-stat-num {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--inv-accent);
    display: block;
    white-space: nowrap;
}

.inv-stat-label {
    font-size: 0.7rem;
    color: var(--inv-gray);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* --- Types Summary Section --- */
.inv-types-section {
    padding: 0 5% 40px;
    background: var(--inv-bg);
}

.inv-types-grid {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.inv-type-card {
    background: var(--inv-card-bg);
    border: 1px solid var(--inv-border);
    border-radius: 10px;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: background-color 0.3s, border-color 0.3s, transform 0.2s;
}

.inv-type-card:hover {
    border-color: var(--inv-accent);
    transform: translateY(-2px);
}

.inv-type-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(214, 61, 70, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--inv-accent);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.inv-type-info {
    display: flex;
    flex-direction: column;
}

.inv-type-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--inv-text);
}

.inv-type-count {
    font-size: 0.78rem;
    color: var(--inv-gray);
}

.inv-empty-types {
    color: var(--inv-gray);
    font-size: 0.9rem;
    font-style: italic;
}

/* --- Section Headers --- */
.inv-section-header {
    margin-bottom: 25px;
}

.inv-label {
    color: var(--inv-accent);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.inv-section-header h2 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    color: var(--inv-text);
    margin: 8px 0 0;
}

.inv-divider {
    width: 50px;
    height: 2px;
    background: var(--inv-accent);
    margin-top: 12px;
}

/* --- Form Section --- */
.inv-form-section {
    padding: 50px 5%;
    background: var(--inv-bg);
}

.inv-form-card {
    background: var(--inv-card-bg);
    border: 1px solid var(--inv-border);
    border-radius: 12px;
    padding: 25px;
    transition: background-color 0.3s, border-color 0.3s;
}

.inv-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 18px;
    margin-bottom: 20px;
}

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

.inv-form-group label {
    font-size: 0.8rem;
    color: var(--inv-gray);
    margin-bottom: 5px;
    font-weight: 500;
}

.inv-form-group input,
.inv-form-group select {
    padding: 10px 14px;
    border: 1px solid var(--inv-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    background-color: var(--inv-input-bg);
    color: var(--inv-text);
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.inv-form-group input:focus,
.inv-form-group select:focus {
    border-color: var(--inv-accent);
    box-shadow: 0 0 0 3px rgba(214, 61, 70, 0.1);
}

.inv-form-group input::placeholder {
    color: var(--inv-gray);
    opacity: 0.6;
}

.inv-form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%23666' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 35px;
    cursor: pointer;
}

[data-theme="dark"] .inv-form-group select {
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%23999' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
}

.inv-form-group select option {
    background: var(--inv-card-bg);
    color: var(--inv-text);
}

.btn-inv-submit {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 30px;
    font-size: 0.95rem;
}

/* --- List Section --- */
.inv-list-section {
    padding: 50px 5%;
    background: var(--inv-bg);
}

/* --- Toolbar (Search + Sort + Export) --- */
.inv-toolbar {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.inv-toolbar-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.inv-sort-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.inv-sort-label {
    font-size: 0.8rem;
    color: var(--inv-gray);
    white-space: nowrap;
}

.inv-sort-select {
    padding: 8px 30px 8px 12px;
    border: 1px solid var(--inv-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.82rem;
    background-color: var(--inv-card-bg);
    color: var(--inv-text);
    outline: none;
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23666' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    transition: border-color 0.3s;
}

.inv-sort-select:focus {
    border-color: var(--inv-accent);
}

[data-theme="dark"] .inv-sort-select {
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%23999' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
}

.inv-export-group {
    display: flex;
    gap: 8px;
    margin-left: auto;
}

.btn-inv-sm {
    padding: 7px 14px !important;
    font-size: 0.8rem !important;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* --- Search Bar --- */
.inv-search-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--inv-card-bg);
    border: 1px solid var(--inv-border);
    border-radius: 10px;
    padding: 0 16px;
    transition: border-color 0.3s, background-color 0.3s;
}

.inv-search-bar:focus-within {
    border-color: var(--inv-accent);
}

.inv-search-icon {
    color: var(--inv-gray);
    flex-shrink: 0;
}

.inv-search-bar input {
    flex: 1;
    background: none;
    border: none;
    color: var(--inv-text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    padding: 12px 0;
    outline: none;
}

.inv-search-bar input::placeholder {
    color: var(--inv-gray);
}

.inv-search-count {
    font-size: 0.75rem;
    color: var(--inv-gray);
    white-space: nowrap;
    flex-shrink: 0;
}

/* --- Table --- */
.inv-table-container {
    background: var(--inv-card-bg);
    border: 1px solid var(--inv-border);
    border-radius: 12px;
    overflow: hidden;
    transition: background-color 0.3s, border-color 0.3s;
}

.inv-table {
    width: 100%;
    border-collapse: collapse;
}

.inv-table thead {
    background: var(--inv-input-bg);
    border-bottom: 1px solid var(--inv-border);
}

.inv-table th {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--inv-gray);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-align: left;
    padding: 12px 14px;
    white-space: nowrap;
}

.inv-table td {
    padding: 11px 14px;
    font-size: 0.88rem;
    border-bottom: 1px solid var(--inv-border);
    vertical-align: middle;
    color: var(--inv-text);
}

.inv-table tbody tr {
    transition: background-color 0.2s;
}

.inv-table tbody tr:hover {
    background: rgba(214, 61, 70, 0.04);
}

.inv-table tbody tr:last-child td {
    border-bottom: none;
}

[data-theme="dark"] .inv-table tbody tr:hover {
    background: rgba(214, 61, 70, 0.08);
}

/* --- Table Cells --- */
.inv-cell-id {
    font-family: 'Courier New', monospace;
    font-weight: 600;
    color: var(--inv-accent);
    font-size: 0.8rem;
    letter-spacing: 0.03em;
}

.inv-cell-modelo {
    font-weight: 500;
    max-width: 160px;
}

.inv-cell-valor {
    font-weight: 600;
    color: var(--inv-accent);
    white-space: nowrap;
}

.inv-cell-age {
    font-size: 0.82rem;
    color: var(--inv-gray);
    white-space: nowrap;
}

.inv-cell-age.recent {
    color: var(--inv-success);
}

.inv-cell-age.medium {
    color: var(--inv-warning);
}

.inv-cell-age.old {
    color: var(--inv-danger);
}

/* --- Status Badges --- */
.inv-estado-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 100px;
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.inv-estado-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.inv-estado-badge.excelente {
    background: rgba(34, 197, 94, 0.12);
    color: #16a34a;
    border: 1px solid rgba(34, 197, 94, 0.25);
}
.inv-estado-badge.excelente::before { background: #22c55e; }

.inv-estado-badge.bueno {
    background: rgba(59, 130, 246, 0.12);
    color: #2563eb;
    border: 1px solid rgba(59, 130, 246, 0.25);
}
.inv-estado-badge.bueno::before { background: #3b82f6; }

.inv-estado-badge.mantenimiento {
    background: rgba(245, 158, 11, 0.12);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.25);
}
.inv-estado-badge.mantenimiento::before { background: #f59e0b; }

.inv-estado-badge.danado {
    background: rgba(239, 68, 68, 0.12);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.25);
}
.inv-estado-badge.danado::before { background: #ef4444; }

/* --- QR Thumbnail --- */
.inv-qr-thumb {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    overflow: hidden;
    border: 1px solid var(--inv-border);
}

.inv-qr-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.inv-qr-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.inv-qr-thumb canvas {
    width: 100% !important;
    height: 100% !important;
}

/* --- Action Buttons --- */
.inv-actions-cell {
    display: flex;
    gap: 6px;
}

.inv-btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: rgba(214, 61, 70, 0.08);
    border: 1px solid rgba(214, 61, 70, 0.2);
    color: var(--inv-accent);
    cursor: pointer;
    transition: background 0.2s, color 0.2s, transform 0.15s;
}

.inv-btn-icon:hover {
    background: var(--inv-accent);
    color: #fff;
    transform: scale(1.08);
}

.inv-btn-icon.danger {
    background: rgba(239, 68, 68, 0.08);
    border-color: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.inv-btn-icon.danger:hover {
    background: #ef4444;
    color: #fff;
}

/* --- Empty State --- */
.inv-empty-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    color: var(--inv-gray);
}

.inv-empty-state.visible {
    display: flex;
}

.inv-empty-state svg {
    color: var(--inv-accent);
    margin-bottom: 15px;
    opacity: 0.4;
}

.inv-empty-state p {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--inv-text);
    margin-bottom: 5px;
}

.inv-empty-state span {
    font-size: 0.85rem;
    color: var(--inv-gray);
}

/* --- Modals --- */
.inv-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 300;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s;
}

.inv-modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.inv-modal {
    background: var(--inv-card-bg);
    border: 1px solid var(--inv-accent);
    border-radius: 14px;
    padding: 25px;
    max-width: 400px;
    width: 100%;
    position: relative;
    transform: scale(0.95) translateY(10px);
    transition: transform 0.25s, background-color 0.3s;
    text-align: center;
}

.inv-modal-overlay.open .inv-modal {
    transform: scale(1) translateY(0);
}

.inv-modal-sm {
    max-width: 340px;
}

.inv-modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--inv-gray);
    font-size: 1.4rem;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: background 0.2s, color 0.2s;
}

.inv-modal-close:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--inv-text);
}

.inv-modal-qr-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--inv-text);
    margin-bottom: 4px;
}

.inv-modal-qr-id {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--inv-accent);
    margin-bottom: 15px;
    letter-spacing: 0.03em;
}

.inv-modal-qr-container {
    background: #fff;
    border-radius: 10px;
    padding: 15px;
    display: inline-flex;
    margin-bottom: 15px;
    border: 1px solid var(--inv-border);
}

.inv-modal-qr-container canvas,
.inv-modal-qr-container img {
    display: block;
}

.inv-modal-qr-details {
    font-size: 0.82rem;
    color: var(--inv-gray);
    margin-bottom: 18px;
    line-height: 1.8;
    text-align: left;
    background: var(--inv-input-bg);
    border-radius: 8px;
    padding: 12px;
    border: 1px solid var(--inv-border);
    transition: background-color 0.3s, border-color 0.3s;
}

.inv-modal-qr-details strong {
    color: var(--inv-text);
}

.inv-modal-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Delete Modal --- */
.inv-modal-delete-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
    color: #ef4444;
}

.inv-modal-delete-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--inv-text);
    margin-bottom: 5px;
}

.inv-modal-delete-text {
    color: var(--inv-gray);
    font-size: 0.85rem;
    margin-bottom: 18px;
}

/* --- Danger Button --- */
.btn-danger {
    background-color: #ef4444;
    color: #fff;
}

.btn-danger:hover {
    background-color: #dc2626;
}

/* --- Toast --- */
.inv-toast {
    position: fixed;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%) translateY(15px);
    background: var(--inv-card-bg);
    border: 1px solid var(--inv-accent);
    color: var(--inv-text);
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 0.88rem;
    font-weight: 500;
    z-index: 400;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.inv-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* --- Print QR Area --- */
@media print {
    body * { visibility: hidden; }

    .qr-print-area,
    .qr-print-area * {
        visibility: visible;
    }

    .qr-print-area {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        text-align: center;
    }

    .qr-print-area .qr-print-id {
        font-family: 'Courier New', monospace;
        font-size: 14pt;
        font-weight: bold;
        margin-bottom: 8px;
    }

    .qr-print-area .qr-print-modelo {
        font-size: 11pt;
        margin-bottom: 10px;
        color: #333;
    }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .inv-hero h1 {
        font-size: 2rem;
    }

    .inv-stats {
        gap: 20px;
    }

    .inv-stat-num {
        font-size: 1.3rem;
    }

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

    .inv-table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .inv-table {
        min-width: 750px;
    }

    .inv-toolbar-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .inv-sort-group {
        justify-content: space-between;
    }

    .inv-export-group {
        margin-left: 0;
        justify-content: flex-end;
    }
}

@media (max-width: 480px) {
    .inv-hero {
        padding: 40px 4% 25px;
    }

    .inv-hero h1 {
        font-size: 1.6rem;
    }

    .inv-form-section,
    .inv-list-section {
        padding: 35px 4%;
    }

    .inv-types-section {
        padding: 0 4% 30px;
    }

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

    .inv-form-card {
        padding: 18px;
    }

    .inv-search-bar {
        padding: 0 12px;
    }

    .inv-actions-cell {
        flex-direction: column;
        gap: 4px;
    }

    .inv-btn-icon {
        width: 28px;
        height: 28px;
    }

    .inv-section-header h2 {
        font-size: 1.4rem;
    }

    .inv-sort-select {
        flex: 1;
    }
}

/* --- Undo Toast --- */
.inv-toast-undo {
    display: flex;
    align-items: center;
    gap: 15px;
    background: #1e1e1e;
    border-color: #444;
}

.btn-undo {
    background: var(--inv-accent);
    color: #fff;
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    letter-spacing: 0.5px;
    transition: background 0.2s;
}

.btn-undo:hover {
    background: #b52f37;
}

/* --- Nav Button --- */
.btn-nav {
    padding: 6px 10px;
    font-size: 0.85rem;
    border-radius: 6px;
}

/* --- Filters --- */
.inv-toolbar-filters {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.inv-filter-select {
    padding: 8px 12px;
    border: 1px solid var(--inv-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    background-color: var(--inv-input-bg);
    color: var(--inv-text);
    outline: none;
    cursor: pointer;
    transition: border-color 0.3s;
}

.inv-filter-select:focus {
    border-color: var(--inv-accent);
}

/* --- Email Modal --- */
.inv-modal-md {
    max-width: 450px;
}

.inv-modal-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--inv-text);
    margin-bottom: 5px;
}

.inv-modal-subtitle {
    color: var(--inv-gray);
    font-size: 0.85rem;
    margin-bottom: 20px;
}

.inv-email-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 15px;
    border: 1px solid var(--inv-border);
    border-radius: 8px;
    padding: 8px;
}

.inv-email-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 10px;
    border-radius: 6px;
    transition: background 0.2s;
}

.inv-email-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.inv-email-item span {
    font-size: 0.9rem;
    color: var(--inv-text);
}

.inv-email-item .inv-email-owner {
    font-size: 0.75rem;
    color: var(--inv-accent);
    font-weight: 500;
    margin-left: 8px;
}

.inv-email-item button {
    background: none;
    border: none;
    color: var(--inv-gray);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
}

.inv-email-item button:hover {
    color: var(--inv-danger);
    background: rgba(239, 68, 68, 0.1);
}

.inv-email-add {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.inv-email-add input {
    flex: 1;
    padding: 10px 12px;
    border: 1px solid var(--inv-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    background-color: var(--inv-input-bg);
    color: var(--inv-text);
    outline: none;
}

.inv-email-add input:focus {
    border-color: var(--inv-accent);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.inv-email-note {
    color: var(--inv-gray);
    text-align: center;
}

/* --- Loading Spinner --- */
.inv-loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 5000;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
}

.inv-loading-spinner {
    background: var(--inv-card-bg);
    padding: 30px 40px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.inv-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--inv-border);
    border-top-color: var(--inv-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 15px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.inv-loading-text {
    color: var(--inv-text);
    font-size: 0.9rem;
}