/**
 * POS Progressive Web App - Mobile-First Stylesheet
 * Primary Accent: Indigo Blue (#2563eb)
 * Neutral: Slate Grey
 */

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-subtle: #eff6ff;
    --primary-border: #bfdbfe;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    --surface: #ffffff;
    --background: #f8fafc;
    --border-color: #e2e8f0;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --bottom-nav-height: 62px;
}

/* Global resets & typography */
body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background);
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    -webkit-tap-highlight-color: transparent;
}

/* App Main Container: Provide bottom clearance on mobile for bottom navigation */
.app-main {
    padding-bottom: calc(var(--bottom-nav-height) + 1.5rem + env(safe-area-inset-bottom, 0px)) !important;
}

@media (min-width: 768px) {
    .app-main {
        padding-bottom: 2rem !important;
    }
}

/* Topbar Branding & Mobile Responsiveness */
.app-topbar {
    min-height: 56px;
    background: #ffffff;
    z-index: 1020;
}
.app-topbar .navbar-brand {
    min-width: 0;
}
.brand-icon {
    width: 34px;
    height: 34px;
    min-width: 34px;
}
@media (min-width: 576px) {
    .app-topbar {
        min-height: 60px;
    }
    .brand-icon {
        width: 36px;
        height: 36px;
        min-width: 36px;
    }
}
.brand-text {
    color: var(--text-main);
    letter-spacing: -0.02em;
    max-width: 135px;
}
@media (min-width: 360px) {
    .brand-text {
        max-width: 160px;
    }
}
@media (min-width: 420px) {
    .brand-text {
        max-width: 220px;
    }
}
@media (min-width: 576px) {
    .brand-text {
        max-width: 320px;
    }
}
@media (min-width: 768px) {
    .brand-text {
        max-width: none;
    }
}

/* Reset button min-height for topbar controls */
.app-topbar .btn {
    min-height: unset;
}

/* Sleek Icon Button for Topbar Printer Selector */
.nav-printer-btn {
    width: 36px;
    height: 36px;
    min-width: 36px;
    padding: 0;
    background-color: #f8fafc;
    border-color: #e2e8f0 !important;
    transition: all 0.2s ease;
}
@media (min-width: 576px) {
    .nav-printer-btn {
        width: 38px;
        height: 38px;
        min-width: 38px;
    }
}
.nav-printer-btn:hover, .nav-printer-btn:focus-visible {
    background-color: #eff6ff;
    border-color: #93c5fd !important;
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(37, 99, 235, 0.15);
}
.nav-printer-btn:active {
    transform: scale(0.93);
    background-color: #dbeafe;
}

/* Mobile-First Touch Targets: minimum 44px for accessibility */
.btn, .form-control, .form-select, .input-group-text {
    min-height: 44px;
}

.btn-touch {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

/* Modern Card Styling */
.card {
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.02);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card-clickable {
    cursor: pointer;
}
.card-clickable:active {
    transform: scale(0.98);
}

/* Shadow utilities */
.shadow-xs {
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

/* Bottom Navigation Bar on Mobile */
.mobile-bottom-nav {
    height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    z-index: 1030;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    background-color: rgba(255, 255, 255, 0.96);
    border-top: 1px solid var(--border-color);
}

.bottom-nav-item {
    flex: 1;
    min-height: 48px;
    height: 100%;
    padding: 6px 0;
    transition: color 0.15s ease, background-color 0.15s ease;
    border-radius: var(--radius-sm);
    user-select: none;
}

.bottom-nav-item .icon-wrap {
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bottom-nav-item .label {
    font-size: 0.72rem;
    line-height: 1;
}

.bottom-nav-item.active {
    color: var(--primary) !important;
}

.bottom-nav-item.active .icon-wrap i {
    transform: scale(1.1);
    transition: transform 0.2s ease;
}

.bottom-nav-item:active {
    background-color: var(--primary-subtle);
}

/* Desktop Navigation Hover */
.nav-desktop .nav-link {
    transition: all 0.15s ease;
}
.nav-desktop .nav-link:hover {
    background-color: #f1f5f9;
}
.nav-desktop .nav-link.active {
    background-color: var(--primary-subtle);
    color: var(--primary);
}

/* Currency & Number formatting */
.amount-text {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

/* Modal Customizations */
.modal-content {
    border-radius: var(--radius-lg);
}

/* Custom Scrollbar for sleek UI */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Horizontal Chip Scroller */
.no-scrollbar::-webkit-scrollbar {
    display: none;
}
.no-scrollbar {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* Responsive 3-Column Billing Grid */
@media (min-width: 992px) {
    .billing-tab-content > .tab-pane {
        display: block !important;
        opacity: 1 !important;
        visibility: visible !important;
    }
}

/* Mobile Cart Quick Bar */
.mobile-cart-bar {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom, 0px));
    left: 0;
    right: 0;
    z-index: 1025;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    border-top: 1px solid var(--border-color);
}

/* Quantity Stepper Buttons */
.btn-qty {
    width: 34px;
    height: 34px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    border-radius: 6px;
}

/* Spin animation for refresh buttons */
.spin-animation {
    display: inline-block;
    animation: spin 0.6s linear infinite;
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Button variants */
.btn-white {
    background-color: #ffffff;
    color: #1e293b;
    border: 1px solid rgba(0, 0, 0, 0.05);
}
.btn-white:hover {
    background-color: #f8fafc;
    color: #0f172a;
}
.btn-transparent {
    background-color: transparent;
    border: none;
}