:root {
    --form-bg: #0d1526;
    --card-bg: rgba(255,255,255,0.05);
    --card-border: rgba(255,255,255,0.10);
    --input-bg: rgba(255,255,255,0.06);
    --input-border: rgba(255,255,255,0.14);
    --input-focus: #4f8ef7;
    --label: #94a3b8;
    --text: #e2e8f0;
    --text-muted: #64748b;
    --primary: #4f8ef7;
    --primary-dim: rgba(79,142,247,0.15);
    --danger: #ef4444;
    --danger-dim: rgba(239,68,68,0.12);
    --success: #22c55e;
    --success-dim: rgba(34,197,94,0.12);
    --teal: #14b8a6;
    --teal-dim: rgba(20,184,166,0.12);
    --radius: 10px;
    --radius-sm: 6px;
}

body { font-family: 'Inter', sans-serif; background: #06080f; color: var(--text); }

/* ── Tool layout ─────────────────────────────── */
.tool-wrap {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 16px;
    padding: 16px 20px 40px;
    max-width: 1400px;
    margin: 0 auto;
}
@media (max-width: 900px) {
    .tool-wrap { grid-template-columns: 1fr; }
}

/* ── Sticky sidebar (desktop only) ──────────── */
@media (min-width: 901px) {
    .sidebar-col { position: sticky; top: 80px; align-self: start; }
}

/* ── Invoice Details + Bill To equal-height row ── */
.header-cards-row {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 12px;
    align-items: stretch;
}
.header-cards-row > .card { display: flex; flex-direction: column; height: 100%; flex-grow: 1; }
@media (max-width: 600px) {
    .header-cards-row { grid-template-columns: 1fr; }
}


/* ── Cards ───────────────────────────────────── */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 18px;
}
.card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 16px;
    color: var(--text);
}
.card-header i { color: var(--primary); font-size: 15px; }
.card-header .badge {
    margin-left: auto;
    background: var(--primary);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 20px;
}

/* ── Form inputs ─────────────────────────────── */
.form-group { margin-bottom: 10px; }
.form-group label {
    display: block;
    font-size: 11px;
    font-weight: 500;
    color: var(--label);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.form-row { display: grid; gap: 10px; }
.form-row.cols-2 { grid-template-columns: 1fr 1fr; }
.form-row.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
@media (max-width: 700px) {
    .form-row.cols-2, .form-row.cols-3 { grid-template-columns: 1fr; }
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="tel"],
input[type="date"],
select,
textarea {
    width: 100%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 13px;
    font-family: inherit;
    padding: 8px 10px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
input:focus, select:focus, textarea:focus {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(79,142,247,0.15);
}
input::placeholder, textarea::placeholder { color: var(--text-muted); }
select option { background: #0d1526; color: var(--text); }
textarea { resize: vertical; min-height: 72px; }

/* ── Buttons ─────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: opacity 0.18s, transform 0.12s;
    font-family: inherit;
}
.btn:hover { opacity: 0.88; }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--primary); color: #fff; width: 100%; justify-content: center; padding: 10px; }
.btn-outline {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text);
}
.btn-danger { background: var(--danger-dim); color: var(--danger); border: 1px solid rgba(239,68,68,0.25); }
.btn-success { background: var(--success); color: #fff; font-size: 14px; padding: 12px 28px; }
.btn-purple { background: #7c3aed; color: #fff; font-size: 14px; padding: 12px 28px; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 4px;
    transition: background 0.15s;
    color: var(--text-muted);
}
.btn-icon:hover { background: rgba(255,255,255,0.08); color: var(--danger); }

/* ── Toggle / switch ─────────────────────────── */
.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}
.toggle-row label { font-size: 13px; color: var(--text); margin-bottom: 0; }
.switch { position: relative; display: inline-block; width: 36px; height: 20px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute; inset: 0;
    background: rgba(255,255,255,0.15);
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.2s;
}
.slider:before {
    content: '';
    position: absolute;
    left: 3px; top: 3px;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.2s;
}
input:checked + .slider { background: var(--primary); }
input:checked + .slider:before { transform: translateX(16px); }

/* ── Segmented control ───────────────────────── */
.seg-ctrl { display: flex; border: 1px solid var(--input-border); border-radius: var(--radius-sm); overflow: hidden; }
.seg-ctrl button {
    flex: 1;
    padding: 7px 4px;
    font-size: 12px;
    font-weight: 600;
    font-family: inherit;
    background: transparent;
    color: var(--text-muted);
    border: none;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}
.seg-ctrl button.active { background: var(--primary); color: #fff; }

/* ── Invoice items list ──────────────────────── */
.items-list { min-height: 120px; }
.item-row {
    display: grid;
    grid-template-columns: 28px 1fr 70px 90px 80px 70px 90px auto;
    gap: 6px;
    align-items: center;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--card-border);
    margin-bottom: 6px;
}
.item-nums-group { display: contents; }
.item-footer-row { display: contents; }
.item-actions { display: flex; gap: 2px; }
@media (max-width: 900px) {
    .item-row { display: flex; flex-direction: column; gap: 0; padding: 12px; }
    .item-num { display: none; }
    .item-nums-group { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 12px; margin-top: 8px; width: 100%; }
    .item-footer-row { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; width: 100%; }
    .item-field { text-align: left; }
    .item-field span { text-align: left; }
    .item-total { font-size: 15px; }
}
.item-num {
    width: 28px; height: 28px;
    background: var(--primary-dim);
    color: var(--primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700;
}
.item-name { font-weight: 600; font-size: 13px; }
.item-sub { font-size: 11px; color: var(--text-muted); margin-top: 1px; }
.type-tag {
    display: inline-block;
    font-size: 10px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 4px;
}
.type-product { background: rgba(99,102,241,0.15); color: #818cf8; }
.type-service { background: rgba(168,85,247,0.15); color: #c084fc; }
.item-field { font-size: 13px; text-align: right; }
.item-field span { display: block; font-size: 10px; color: var(--text-muted); text-align: right; }
.item-total { font-weight: 700; font-size: 14px; color: var(--success); text-align: right; }

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 40px 20px;
    color: var(--text-muted);
}
.empty-state i { font-size: 48px; opacity: 0.3; }

/* ── Totals panel ────────────────────────────── */
.totals-section {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    margin-top: 12px;
}
@media (max-width: 700px) { .totals-section { grid-template-columns: 1fr; } }
.totals-panel {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    min-width: 320px;
}
.total-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    padding: 4px 0;
    color: var(--text-muted);
}
.total-row.grand {
    color: var(--success);
    font-size: 18px;
    font-weight: 700;
    border-top: 1px solid var(--card-border);
    margin-top: 8px;
    padding-top: 12px;
}
.total-row.grand .total-val { color: var(--success); }
.total-val { font-weight: 600; color: var(--text); }

/* ── Additional costs ────────────────────────── */
.extra-costs {
    background: var(--teal-dim);
    border: 1px solid rgba(20,184,166,0.2);
    border-radius: var(--radius-sm);
    margin-top: 10px;
    overflow: hidden;
}
.extra-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--teal);
    user-select: none;
}
.extra-header i { font-size: 14px; }
.extra-header .ec-badge {
    background: var(--teal);
    color: #fff;
    font-size: 10px;
    padding: 1px 6px;
    border-radius: 10px;
}
.extra-header .chevron { margin-left: auto; transition: transform 0.2s; }
.extra-header.open .chevron { transform: rotate(180deg); }
.extra-body { padding: 10px 14px 12px; border-top: 1px solid rgba(20,184,166,0.2); }
.extra-row {
    display: grid;
    grid-template-columns: 1fr 120px 32px;
    gap: 6px;
    align-items: center;
    margin-bottom: 6px;
}

/* ── Action bar ──────────────────────────────── */
.action-bar {
    display: flex;
    gap: 12px;
    justify-content:space-around;
    padding: 16px 0 0;
    flex-wrap: wrap;
}
.action-bar .btn { font-size: 14px; padding: 12px 28px; }

/* ── Hero banner ─────────────────────────────── */
.tool-hero {
    padding: 100px 20px 24px;
    text-align: center;
}
.tool-hero h1 { font-size: 2rem; font-weight: 700; margin-bottom: 8px; }
.tool-hero p { color: var(--text-muted); font-size: 14px; }
.tool-hero .notice {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 10px;
    background: var(--success-dim);
    color: var(--success);
    font-size: 12px;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 20px;
    border: 1px solid rgba(34,197,94,0.25);
}

.notice-help
{
    color: var(--danger) !important;
    background: var(--danger-dim) !important;
    border: 1px solid rgba(197, 34, 34, 0.25) !important;
}

/* ── Divider ─────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--card-border); margin: 12px 0; }

/* ── Section title ───────────────────────────── */
.section-meta {
    display: flex;
    align-items: center;
    gap: 16px;
}
.section-meta .flex-1 { flex: 1; }

/* Invoice number display */
.inv-number {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 0.04em;
}

/* ── Scroll area for items ───────────────────── */
.items-scroll { max-height: 320px; overflow-y: auto; padding-right: 4px; }
.items-scroll::-webkit-scrollbar { width: 4px; }
.items-scroll::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 4px; }

/* Print override */
@media print { .no-print { display: none !important; } }

/* ── Welcome modal ───────────────────────────── */
#welcome-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(6, 8, 15, 0.92);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.welcome-box {
    background: #0d1526;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 18px;
    padding: 40px 36px;
    max-width: 520px;
    width: 100%;
    text-align: center;
    box-shadow: 0 24px 80px rgba(0,0,0,0.6);
}
.welcome-box .logo-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 8px;
}
.welcome-box h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 6px;
}
.welcome-box p {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 32px;
}
.welcome-choices {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
@media (max-width: 480px) { .welcome-choices { grid-template-columns: 1fr; } }
.choice-card {
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 24px 16px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
    background: rgba(255,255,255,0.03);
    user-select: none;
}
.choice-card:hover {
    border-color: var(--primary);
    background: var(--primary-dim);
    transform: translateY(-2px);
}
.choice-card:active { transform: scale(0.97); }
.choice-card .choice-icon {
    font-size: 32px;
    margin-bottom: 12px;
}
.choice-card.new .choice-icon { color: var(--success); }
.choice-card.import .choice-icon { color: var(--primary); }
.choice-card h3 { font-size: 15px; font-weight: 700; margin-bottom: 5px; }
.choice-card p { font-size: 12px; color: var(--text-muted); margin-bottom: 0; }

/* ── Add Item Dialog ─────────────────────────── */
.dialog-overlay {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: rgba(6, 8, 15, 0.92);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}
.dialog-overlay.open {
    opacity: 1;
    visibility: visible;
}
.dialog-box {
    background: var(--form-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 18px;
    max-width: 500px;
    width: 100%;
    box-shadow: 0 12px 24px rgba(0,0,0,0.4);
    transform: translateY(20px);
    transition: transform 0.2s;
}
.dialog-overlay.open .dialog-box {
    transform: translateY(0);
}
.dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 16px;
    color: var(--text);
}
.dialog-header h3 { margin-bottom: 0; display: flex; align-items: center; gap: 8px; }
.dialog-header i { color: var(--primary); font-size: 15px; }
.dialog-body {
    max-height: 70vh; /* Limit height for scrollable content */
    overflow-y: auto;
    padding-right: 5px; /* Space for scrollbar */
}

.add-item-mobile-btn { display: flex !important; }
@media (min-width: 901px) {
    .add-item-mobile-btn { width: auto !important; padding: 7px 16px !important; font-size: 13px !important; align-self: flex-start; }
}