:root {
    --bg-color: #05070d;
    --bg-elevated: #0a0f1a;
    --glass-bg: rgba(12, 22, 40, 0.72);
    --glass-border: rgba(0, 210, 255, 0.12);
    --text-primary: #f4f8ff;
    --text-secondary: #8b9bb4;
    --accent: #00d2ff;
    --accent-deep: #0055ff;
    --accent-glow: rgba(0, 210, 255, 0.35);
    --danger: #ff5c6c;
    --success: #2dd4a8;
    --warning: #f5b942;
    --radius: 14px;
    --radius-lg: 18px;
    --nav-height: 72px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', system-ui, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 100%;
    overflow-x: hidden;
}

body {
    background:
        radial-gradient(ellipse 80% 50% at 90% -10%, rgba(0, 210, 255, 0.14), transparent 55%),
        radial-gradient(ellipse 60% 40% at 0% 100%, rgba(0, 85, 255, 0.12), transparent 50%),
        var(--bg-color);
}

.bg-glow {
    pointer-events: none;
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(0, 210, 255, 0.03) 100%);
    z-index: 0;
}

[hidden] { display: none !important; }

.no-print { display: block; }
.print-only { display: none; }

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

@media (min-width: 1025px) {
    .glass-panel {
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
    }
}

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(2, 4, 10, 0.92);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.overlay.active { display: flex; }

.auth-card {
    width: 100%;
    max-width: 420px;
    padding: 36px 28px;
    text-align: center;
}
.auth-card h2 {
    font-size: 1.6rem;
    font-weight: 800;
    margin: 12px 0 8px;
}
.auth-card p {
    color: var(--text-secondary);
    margin-bottom: 28px;
    font-size: 0.95rem;
}

.brand-block {
    display: flex;
    align-items: center;
    gap: 14px;
    justify-content: center;
    margin-bottom: 8px;
}
.logo-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 12px;
    flex-shrink: 0;
}
.brand-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    line-height: 1.15;
}
.brand-name {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}
.brand-sub {
    font-size: 0.72rem;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.input-group { position: relative; margin-bottom: 14px; width: 100%; }
.input-group input,
.input-group input[type="file"] {
    width: 100%;
    padding: 15px 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    color: var(--text-primary);
    outline: none;
    font-size: 16px;
    transition: border-color 0.2s, background 0.2s;
}
.input-group input:focus {
    border-color: var(--accent);
    background: rgba(0, 210, 255, 0.06);
    box-shadow: 0 0 0 3px rgba(0, 210, 255, 0.12);
}
.input-group.with-icon input { padding-left: 48px; }
.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}
.field-label {
    display: block;
    text-align: left;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.auth-switch { margin-top: 20px; font-size: 14px; color: var(--text-secondary); }
.auth-switch span {
    color: var(--accent);
    cursor: pointer;
    font-weight: 700;
    text-decoration: underline;
}

.admin-panel {
    width: 100%;
    max-width: 850px;
    padding: 28px;
    max-height: 85vh;
    overflow-y: auto;
}
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.admin-header h2 { font-weight: 800; font-size: 1.35rem; }

table { width: 100%; border-collapse: collapse; margin-top: 12px; }
th {
    text-align: left;
    padding: 12px;
    font-size: 11px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--glass-border);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--glass-border);
    font-size: 14px;
}

.app-container {
    position: relative;
    z-index: 1;
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 280px;
    height: calc(100vh - 32px);
    margin: 16px;
    padding: 28px 20px;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 16px;
    z-index: 100;
    transition: transform 0.35s ease, opacity 0.35s;
}
.sidebar .brand-block { justify-content: flex-start; margin-bottom: 36px; }
.sidebar .logo-img { width: 42px; height: 42px; }

.nav-links { list-style: none; flex: 1; }
.nav-links li {
    padding: 14px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--text-secondary);
    margin-bottom: 8px;
    transition: background 0.28s cubic-bezier(0.22, 1, 0.36, 1), color 0.28s ease, transform 0.28s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.28s ease, box-shadow 0.28s ease;
}
.nav-links li.active {
    background: linear-gradient(135deg, rgba(0, 210, 255, 0.2), rgba(0, 85, 255, 0.25));
    color: var(--text-primary);
    font-weight: 700;
    border: 1px solid rgba(0, 210, 255, 0.35);
    box-shadow: 0 8px 24px rgba(0, 85, 255, 0.15);
}
.nav-links li:hover:not(.active) {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}
.nav-item-content {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
}

.sidebar-footer {
    border-top: 1px solid var(--glass-border);
    padding-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.content-area {
    flex: 1;
    padding: 32px 40px 40px 16px;
    min-width: 0;
}

.section-header { margin-bottom: 28px; }
.section-header h1 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    margin-bottom: 6px;
    letter-spacing: -0.03em;
    background: linear-gradient(120deg, #fff 40%, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.section-header p { color: var(--text-secondary); font-size: 1rem; }

.tool-section {
    display: none;
}
.tool-section.active-section {
    display: block;
    opacity: 1;
    transform: none;
    animation: sectionIn 0.22s cubic-bezier(0.22, 1, 0.36, 1);
}
.tool-section.is-leaving {
    display: block;
    opacity: 1;
    animation: sectionOut 0.12s cubic-bezier(0.4, 0, 1, 1) forwards;
    pointer-events: none;
}
@keyframes sectionIn {
    from { opacity: 0; transform: translate3d(0, 10px, 0); }
    to { opacity: 1; transform: translate3d(0, 0, 0); }
}
@keyframes sectionOut {
    from { opacity: 1; transform: translate3d(0, 0, 0); }
    to { opacity: 0; transform: translate3d(0, -6px, 0); }
}

@media (max-width: 1024px) {
    .tool-section.active-section,
    .tool-section.is-leaving {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .tool-section.active-section,
    .tool-section.is-leaving {
        animation: none !important;
        opacity: 1 !important;
        transform: none !important;
    }
    .toggle-pill,
    .result-value,
    .nav-links li,
    .key,
    .btn {
        animation: none !important;
        transition: none !important;
    }
}

.scanner-wrapper { max-width: 560px; margin: 0 auto; padding: 28px; }
#reader { width: 100%; border-radius: var(--radius); overflow: hidden; }
.scanner-placeholder {
    padding: 64px 24px;
    text-align: center;
    color: var(--text-secondary);
}
.scanner-placeholder i {
    font-size: 56px;
    opacity: 0.35;
    margin-bottom: 20px;
    color: var(--accent);
}
.result-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}
.success-icon { color: var(--success); }
#result-text {
    font-size: 1.1rem;
    font-weight: 700;
    word-break: break-all;
    margin: 12px 0;
}
.warning-box {
    background: rgba(245, 185, 66, 0.1);
    border: 1px solid rgba(245, 185, 66, 0.3);
    border-radius: 12px;
    padding: 12px 14px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--warning);
}
.scanner-actions { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.mobile-only { display: none !important; }
.desktop-only { display: flex; }

.calc-main-container { display: flex; gap: 28px; flex-wrap: wrap; }
.calc-wrapper {
    width: 100%;
    max-width: 380px;
    padding: 24px;
}
.calc-display {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    text-align: right;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}
.calc-current { font-size: 2.5rem; font-weight: 700; word-break: break-all; }
.calc-history {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    min-height: 20px;
}
.calc-keys {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}
.key {
    min-height: 64px;
    border: none;
    border-radius: var(--radius);
    font-size: 1.35rem;
    font-weight: 600;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    transition: transform 0.12s, background 0.12s;
    touch-action: manipulation;
}
.key:active { transform: scale(0.94); background: rgba(0, 210, 255, 0.15); }
.action-key { color: var(--accent); }
.operator-key {
    background: rgba(0, 85, 255, 0.25);
    color: #cfefff;
}
.equals-key {
    background: linear-gradient(135deg, var(--accent), var(--accent-deep));
    color: #041018;
    font-weight: 800;
    box-shadow: 0 8px 20px var(--accent-glow);
}
.zero-key { grid-column: span 1; }

.history-panel {
    flex: 1;
    min-width: 280px;
    padding: 24px;
    max-height: 560px;
    overflow-y: auto;
}
.history-panel h3 {
    margin-bottom: 18px;
    font-weight: 800;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.history-item {
    padding: 14px 0;
    border-bottom: 1px solid var(--glass-border);
}
.hist-calc { font-weight: 600; margin-bottom: 4px; }
.hist-date { font-size: 12px; color: var(--text-secondary); }

.vat-container {
    max-width: 880px;
    margin: 0 auto;
}
.vat-workspace {
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.vat-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    width: 100%;
    padding: 14px 16px;
    border-radius: 14px;
    background: rgba(0, 0, 0, 0.28);
    border: 1px solid var(--glass-border);
}
.vat-rate-meta {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
    flex: 1;
}
.vat-rate-label {
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}
.vat-rate-desc {
    font-size: 0.78rem;
    line-height: 1.35;
    color: var(--text-secondary);
    font-weight: 500;
}
.vat-rate-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
}
.vat-rate-chip {
    display: inline-flex;
    align-items: baseline;
    gap: 3px;
    padding: 8px 10px;
    border-radius: 10px;
    background: rgba(0, 210, 255, 0.1);
    border: 1px solid rgba(0, 210, 255, 0.25);
    font-weight: 800;
    letter-spacing: -0.02em;
    flex: 0 0 auto;
}
.vat-rate-chip[hidden],
.vat-rate-group[hidden],
.change-rate-btn[hidden],
.save-vat-btn[hidden],
.cancel-rate-btn[hidden] {
    display: none !important;
}
.vat-rate-chip .rate-num { font-size: 1.05rem; color: var(--text-primary); }
.vat-rate-chip .rate-suffix { font-size: 0.78rem; color: var(--accent); }
.vat-rate-group {
    margin-bottom: 0;
    width: 78px;
    flex: 0 0 78px;
}
.vat-rate-group input {
    padding: 10px 8px;
    font-size: 15px;
    font-weight: 700;
    text-align: center;
}
.change-rate-btn,
.save-vat-btn,
.cancel-rate-btn {
    width: auto !important;
    min-width: 0;
    margin-left: 0;
    padding: 10px 14px;
    flex: 0 0 auto;
    white-space: nowrap;
}
.cancel-rate-btn { padding: 10px 12px; }

.vat-toggle {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 4px;
    border-radius: 14px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--glass-border);
    touch-action: manipulation;
}
.toggle-pill {
    position: absolute;
    top: 4px;
    left: 4px;
    width: calc(50% - 4px);
    height: calc(100% - 8px);
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(0, 210, 255, 0.28), rgba(0, 85, 255, 0.4));
    border: 1px solid rgba(0, 210, 255, 0.35);
    box-shadow: 0 6px 16px rgba(0, 85, 255, 0.16);
    transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 0;
    pointer-events: none;
}
.vat-toggle[data-mode="new"] .toggle-pill {
    transform: translateX(100%);
}
.toggle-btn {
    position: relative;
    z-index: 1;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 10px;
    border-radius: 10px;
    transition: color 0.18s ease;
    min-height: 52px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}
.toggle-btn i { font-size: 1rem; opacity: 0.85; pointer-events: none; }
.toggle-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 2px;
    line-height: 1.15;
    pointer-events: none;
}
.toggle-copy strong {
    font-size: 0.9rem;
    font-weight: 800;
}
.toggle-copy small {
    font-size: 0.72rem;
    font-weight: 500;
    opacity: 0.75;
}
.toggle-btn.active { color: var(--text-primary); }

.vat-calculator { padding: 4px 2px 0; }
.vat-calculator h2 {
    font-size: 1.35rem;
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}
.vat-subtitle {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.95rem;
    min-height: 1.4em;
    transition: opacity 0.2s ease;
}
.vat-amount-group input {
    font-size: 1.35rem;
    font-weight: 700;
    padding-top: 18px;
    padding-bottom: 18px;
}
.vat-results {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 18px;
}
.result-card {
    padding: 18px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    min-height: 108px;
    transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}
.highlight-card {
    background: rgba(0, 210, 255, 0.08);
    border-color: rgba(0, 210, 255, 0.28);
}
.result-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 700;
}
.result-value {
    font-size: clamp(1.25rem, 2vw, 1.7rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    font-variant-numeric: tabular-nums;
}
.result-value.pulse {
    animation: valuePulse 0.16s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes valuePulse {
    0% { transform: translateY(2px); opacity: 0.45; }
    100% { transform: translateY(0); opacity: 1; }
}

.btn {
    padding: 14px 16px;
    border-radius: var(--radius);
    border: none;
    font-weight: 700;
    cursor: pointer;
    font-size: 15px;
    transition: transform 0.15s, opacity 0.15s;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    touch-action: manipulation;
}
.primary-btn {
    background: linear-gradient(135deg, var(--accent), var(--accent-deep));
    color: #041018;
    box-shadow: 0 8px 22px var(--accent-glow);
}
.primary-btn:active { transform: scale(0.97); opacity: 0.92; }
.secondary-btn {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}
.logout-btn {
    background: rgba(255, 92, 108, 0.1);
    color: var(--danger);
    border: 1px solid rgba(255, 92, 108, 0.2);
}
.modal-cancel { margin-top: 10px; }
.icon-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.15rem;
    opacity: 0.75;
}
.icon-btn:hover { opacity: 1; color: var(--accent); }

.invoice-controls { padding: 16px; margin-bottom: 20px; }
.invoices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 16px;
}
.invoice-card {
    padding: 20px;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.invoice-card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 210, 255, 0.35);
}
.inv-card-header { display: flex; justify-content: space-between; align-items: flex-start; }
.inv-name { font-size: 1.05rem; font-weight: 700; }
.inv-date { font-size: 12px; color: var(--text-secondary); }
.inv-card-footer { display: flex; justify-content: space-between; align-items: center; }
.inv-amount { font-size: 1.15rem; font-weight: 800; color: var(--success); }

.print-header { display: none; }
.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    margin-bottom: 16px;
    gap: 12px;
    flex-wrap: wrap;
}
.editor-title-group { display: flex; align-items: center; gap: 12px; flex: 1; min-width: 160px; }
.editor-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.save-indicator-group { display: flex; align-items: center; gap: 8px; }
.save-status-box {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
    white-space: nowrap;
}
.save-status-box.saved { background: rgba(45, 212, 168, 0.1); color: var(--success); border: 1px solid rgba(45, 212, 168, 0.25); }
.save-status-box.unsaved { background: rgba(255, 92, 108, 0.1); color: var(--danger); border: 1px solid rgba(255, 92, 108, 0.25); }
.save-status-box.saving { background: rgba(245, 185, 66, 0.1); color: var(--warning); border: 1px solid rgba(245, 185, 66, 0.25); }
.save-btn {
    background: rgba(255, 255, 255, 0.05);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--glass-border);
}

.search-td { position: relative; min-width: 160px; }
.row-search-results {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    max-height: 220px;
    overflow-y: auto;
    z-index: 1100;
    display: none;
    flex-direction: column;
    padding: 6px;
    background: rgba(8, 12, 22, 0.98);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.5);
}
.row-search-results.active { display: flex; }
.search-item {
    padding: 12px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}
.search-item:hover { background: rgba(0, 210, 255, 0.1); }
.search-item .p-name { font-weight: 700; font-size: 14px; }
.search-item .p-barcode { font-size: 11px; color: var(--text-secondary); }
.search-item .p-price { font-weight: 800; color: var(--success); }

.invoice-table-wrapper { overflow-x: auto; margin-bottom: 16px; -webkit-overflow-scrolling: touch; }
.invoice-table { width: 100%; border-collapse: collapse; min-width: 900px; }
.invoice-table th {
    background: rgba(0, 210, 255, 0.04);
    padding: 12px;
    font-size: 11px;
}
.invoice-table td { padding: 10px 12px; vertical-align: middle; }
.invoice-table input,
.invoice-table select {
    width: 100%;
    padding: 10px;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: #fff !important;
    font-size: 14px;
    outline: none;
}
.invoice-table input:focus,
.invoice-table select:focus { border-color: var(--accent); }
.invoice-table select option { background: #0a0f1a; color: white; }

.add-line-container { padding: 12px 0; }
.add-line-btn {
    background: rgba(45, 212, 168, 0.1);
    color: var(--success);
    border: 1px dashed rgba(45, 212, 168, 0.5);
    padding: 14px;
    width: 100%;
    border-radius: 12px;
    font-weight: 700;
    cursor: pointer;
}
.invoice-summary {
    margin-top: 20px;
    padding: 22px;
    background: rgba(0, 0, 0, 0.25);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 420px;
    margin-left: auto;
    border: 1px solid var(--glass-border);
}
.summary-item { display: flex; justify-content: space-between; font-size: 14px; color: var(--text-secondary); }
.summary-value { color: var(--text-primary); font-weight: 700; font-size: 1.05rem; }
.grand-total { border-top: 1px solid var(--glass-border); padding-top: 12px; color: var(--text-primary); }
.grand-total .summary-value { font-size: 1.5rem; color: var(--success); }

.mobile-notice {
    display: none;
    padding: 12px 16px;
    margin-bottom: 12px;
    background: rgba(0, 85, 255, 0.12);
    border: 1px solid rgba(0, 210, 255, 0.2);
    border-radius: 12px;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: #9fdfff;
}

/* Mobile: bottom tab bar */
@media (max-width: 1024px) {
    .desktop-only { display: none !important; }
    .mobile-only { display: flex !important; }

    .app-container { flex-direction: column; padding-bottom: calc(var(--nav-height) + var(--safe-bottom) + 12px); }

    .sidebar {
        width: 100%;
        height: calc(var(--nav-height) + var(--safe-bottom));
        margin: 0;
        padding: 0 8px var(--safe-bottom);
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        flex-direction: row;
        border-radius: 18px 18px 0 0;
        background: rgba(5, 8, 16, 0.94);
        border: 1px solid var(--glass-border);
        border-bottom: none;
        z-index: 1000;
        box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.45);
        align-items: center;
        justify-content: center;
    }
    .sidebar.nav-hidden { transform: none; }

    .nav-links {
        display: flex;
        width: 100%;
        justify-content: space-around;
        gap: 4px;
        margin: 0;
        padding: 0;
        flex: 1;
    }
    .nav-links li {
        padding: 8px 4px;
        margin: 0;
        flex: 1;
        display: flex;
        justify-content: center;
        align-items: center;
        border-radius: 12px;
        height: 56px;
        max-width: 88px;
        border: 1px solid transparent;
        touch-action: manipulation;
        -webkit-tap-highlight-color: transparent;
    }
    .nav-links li.active {
        background: rgba(0, 210, 255, 0.12);
        border-color: rgba(0, 210, 255, 0.3);
        box-shadow: none;
    }
    .nav-links li span {
        display: block;
        font-size: 10px;
        font-weight: 600;
        margin-top: 2px;
        pointer-events: none;
    }
    .nav-item-content {
        flex-direction: column;
        gap: 2px;
        font-size: 18px;
        width: 100%;
        justify-content: center;
        pointer-events: none;
    }
    .nav-links li.logout-nav-item,
    .nav-links li.logout-nav-item i { color: var(--danger); }

    .content-area { padding: 20px 16px calc(var(--nav-height) + var(--safe-bottom) + 20px); }
    .section-header { margin-bottom: 18px; }
    .section-header h1 { font-size: 1.55rem; }
    .section-header p { font-size: 0.88rem; }

    .calc-main-container { flex-direction: column; align-items: stretch; }
    .calc-wrapper { max-width: 100%; }
    .key { min-height: 58px; font-size: 1.25rem; }
    .history-panel { width: 100%; min-width: 0; max-height: 280px; }

    .vat-workspace { padding: 14px; gap: 12px; }
    .vat-toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 12px;
    }
    .vat-rate-actions {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    .vat-rate-desc { font-size: 0.72rem; }
    .vat-rate-group { width: 70px; flex-basis: 70px; }
    .change-rate-btn,
    .save-vat-btn,
    .cancel-rate-btn {
        padding: 9px 12px;
        font-size: 13px;
    }
    .vat-results {
        grid-template-columns: 1fr;
    }
    .result-card {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        min-height: 0;
        padding: 14px;
    }
    .toggle-btn {
        flex-direction: column;
        gap: 4px;
        padding: 10px 6px;
        min-height: 64px;
    }
    .toggle-copy { align-items: center; text-align: center; }
    .toggle-copy strong { font-size: 0.8rem; }
    .toggle-copy small { font-size: 0.65rem; }
    .vat-calculator h2 { font-size: 1.1rem; }
    .vat-amount-group input {
        font-size: 1.2rem;
        padding-top: 14px;
        padding-bottom: 14px;
    }

    .mobile-notice { display: flex; }

    .invoice-editor-container { padding: 12px; }
    .invoice-table { min-width: 180%; }
    .invoice-summary { max-width: 100%; margin: 16px 0; }
    .editor-actions .secondary-btn { width: auto; padding: 10px 14px; }
}

@media (max-width: 480px) {
    .result-card { flex-direction: column; align-items: flex-start; }
    .auth-card { padding: 28px 18px; }
    .brand-name { font-size: 1.1rem; }
}

@media print {
    body, html {
        background: white !important;
        color: black !important;
        margin: 0 !important;
        padding: 0 !important;
        overflow: visible !important;
    }
    .bg-glow, .sidebar, .nav-links, .section-header, .mobile-notice,
    .history-panel, .vat-calculator, .scanner-wrapper, .invoice-controls,
    .editor-header, .add-line-container, .icon-btn, .no-print {
        display: none !important;
    }
    .print-only { display: block !important; }
    .app-container { display: block !important; padding: 0 !important; }
    .content-area { padding: 0 !important; }
    .tool-section { display: none !important; }
    #invoice-section { display: block !important; }
    #invoice-list-view { display: none !important; }
    #invoice-editor-view { display: block !important; padding: 16mm !important; }
    .print-header { display: block !important; margin-bottom: 8mm; }
    .print-capsule {
        display: flex;
        justify-content: space-between;
        align-items: center;
        border: 1.5px solid #000;
        border-radius: 8px;
        padding: 12px 20px;
    }
    .capsule-left { text-align: left; flex: 1.5; font-size: 10pt; color: #333; }
    .capsule-middle { text-align: center; flex: 2; }
    .capsule-middle h1 { margin: 0; font-size: 18pt; text-transform: uppercase; color: #000; }
    .capsule-right { flex: 1; }
    .glass-panel { background: white !important; border: none !important; color: black !important; box-shadow: none !important; padding: 0 !important; }
    .invoice-table-wrapper { overflow: visible !important; }
    .invoice-table { width: 100% !important; min-width: 100% !important; }
    .invoice-table th, .invoice-table td {
        width: auto !important;
        padding: 8px !important;
        border: 1px solid #eee !important;
        color: #000 !important;
        display: table-cell !important;
    }
    .invoice-table th { background: #f5f5f5 !important; border-bottom: 2px solid #000 !important; }
    .invoice-table input, .invoice-table select {
        border: none !important;
        color: black !important;
        background: transparent !important;
        padding: 0 !important;
    }
    .invoice-summary {
        border: 1.5px solid #000 !important;
        margin-top: 16px !important;
        max-width: 240px !important;
        page-break-inside: avoid !important;
    }
    .summary-value, .grand-total .summary-value { color: #000 !important; }
    @page { size: A4; margin: 0; }
}