/* ==========================================================================
   hscodedb.com — Vetted Production Design System (Clean Text & Mobile Polish)
   Architecture: entitycodes.org Palette & Card System + businesscalc.org Navigation
   ========================================================================== */

/* Google Fonts Import: Sora (headings) + Inter (body & tabular numbers) */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Sora:wght@600;700;800&display=swap');

:root {
    /* entitycodes.org Palette Tokens */
    --color-ink: #0F172A;          /* Slate 900 */
    --color-muted: #475569;        /* Slate 600 */
    --color-bg-main: #F8FAFC;      /* Slate 50 */
    --color-bg-card: #FFFFFF;      /* White */
    --color-accent: #4F46E5;       /* Indigo 600 */
    --color-accent-hover: #4338CA; /* Indigo 700 */
    --color-accent-light: #EEF2F6; /* Light indigo/gray for tags */
    --color-accent-on-dark: #A5B4FC; /* Indigo 300 */
    --color-success: #047857;      /* Emerald 700 */
    --color-success-bg: #D1FAE5;   /* Emerald 100 */
    --color-error: #B91C1C;        /* Red 700 */
    --color-error-bg: #FEE2E2;     /* Red 100 */
    --color-border: #E2E8F0;       /* Slate 200 */
    
    /* Typography */
    --font-heading: 'Sora', 'Inter', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Inter', sans-serif;
    
    /* Radii & Elevation */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-pill: 9999px;
    
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 10px -1px rgba(15, 23, 42, 0.12), 0 2px 6px -2px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 10px 20px -3px rgba(15, 23, 42, 0.15), 0 4px 8px -4px rgba(15, 23, 42, 0.10);
    --shadow-xl: 0 20px 30px -5px rgba(15, 23, 42, 0.22), 0 8px 12px -6px rgba(15, 23, 42, 0.15);
    
    --gradient-accent: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Resets & Global Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg-main);
    color: var(--color-ink);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

ul, ol {
    list-style: none;
    margin: 0;
    padding: 0;
}

img, video, iframe, canvas, svg {
    max-width: 100%;
    height: auto;
}

input, select, textarea {
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
}

.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9375rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    max-width: 100%;
    white-space: normal;
    word-break: break-word;
    box-sizing: border-box;
    text-align: center;
}
.btn-primary {
    background-color: var(--color-accent);
    color: #FFFFFF !important;
    border: 1px solid var(--color-accent);
}
.btn-primary:hover {
    background-color: #4338CA;
}
.btn-ghost {
    background-color: var(--color-bg-card);
    color: var(--color-ink);
    border: 1px solid var(--color-border);
}
.btn-ghost:hover {
    background-color: var(--color-bg-main);
    border-color: var(--color-ink);
}


/* Tabular Numerics */
.tnum, .tabular-nums, table td, .stat-value, .result-figure, .badge-num, input[type="number"], .metric-val, td.code-cell, td.duty-cell, .code-chip, .duty-badge, .decode-code {
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum";
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-ink);
    letter-spacing: -0.02em;
    word-break: break-word;
}

h1, .display-xl {
    font-size: 2.35rem;
    margin-bottom: 0.75rem;
    letter-spacing: -0.03em;
}

.display-lg {
    font-size: 1.85rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.5rem;
    margin-top: 1.75rem;
    margin-bottom: 1rem;
    border-top: 1px solid var(--color-border);
    padding-top: 1rem;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

h4 {
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

p.lead, .body-lg {
    font-size: 1.125rem;
    color: var(--color-ink);
}

.caption {
    font-size: 0.875rem;
    color: var(--color-muted);
}

.eyebrow {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-accent-hover);
    text-decoration: underline;
}

/* Container & Layout Shell */
.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
    min-width: 0;
}

main {
    flex: 1;
    min-width: 0;
}

/* White Soft-Shadow Cards & Panels */
.card, .glass-panel, .feature-card, .extractable-answer {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
    transition: var(--transition);
    min-width: 0;
}

.card:hover, .glass-panel:hover, .feature-card:hover, .extractable-answer:hover {
    box-shadow: var(--shadow-md);
}

/* Buttons & Controls */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.875rem;
    line-height: 1;
    padding: 0.625rem 1rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
    min-height: 40px;
    text-decoration: none;
    white-space: nowrap;
    max-width: 100%;
}

.btn-primary {
    background-color: var(--color-accent);
    color: #FFFFFF;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: #FFFFFF;
    text-decoration: none;
}

.btn-ghost {
    background-color: var(--color-bg-card);
    color: var(--color-ink);
    border-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.btn-ghost:hover {
    background-color: var(--color-bg-main);
    color: var(--color-accent);
    text-decoration: none;
}

/* Action Bar & Share Button Wrapper (Wrapping Enabled) */
.action-bar-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-bottom: 16px;
    padding: 14px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    min-width: 0;
}

.share-buttons-group {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-left: auto;
    min-width: 0;
}

/* Header & Navigation Bar */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    position: relative;
    min-width: 0;
}

/* Brand Logo */
.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--color-ink);
    text-decoration: none;
    flex-shrink: 0;
}

.brand-mark {
    background: var(--gradient-accent);
    color: #FFFFFF;
    width: 2.1rem;
    height: 2.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-weight: 800;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

/* Desktop Nav List & Dropdowns */
.nav-desktop {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-links-list {
    display: flex;
    gap: 0.75rem;
    list-style: none;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-item-dropdown {
    position: relative;
}

.nav-dropdown-btn {
    background: transparent;
    border: none;
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--color-muted);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0.5rem 0.625rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: var(--transition);
}

.nav-dropdown-btn:hover,
.nav-item-dropdown:hover .nav-dropdown-btn,
.nav-item-dropdown:focus-within .nav-dropdown-btn {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}

/* Mega Menu Dropdown Panel */
.mega-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    margin-top: 0.5rem;
    padding: 1.25rem;
}

.nav-item-dropdown:hover .mega-menu,
.nav-item-dropdown:focus-within .mega-menu {
    display: block;
}

.mega-menu-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
    width: 620px;
}

.mega-col {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.mega-col .eyebrow {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.25rem;
    margin-bottom: 0.25rem;
}

.mega-col ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.mega-col a {
    font-size: 0.8125rem;
    color: var(--color-muted);
    font-weight: 500;
    padding: 0.2rem 0;
    display: block;
    text-decoration: none;
}

.mega-col a:hover {
    color: var(--color-accent);
}

/* Mobile Nav Toggle Hamburger Button */
.mobile-nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-ink);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    min-height: 40px;
    min-width: 40px;
    align-items: center;
    justify-content: center;
}

.hamburger-box {
    width: 22px;
    height: 16px;
    display: inline-block;
    position: relative;
}

.hamburger-inner, .hamburger-inner::before, .hamburger-inner::after {
    width: 22px;
    height: 2px;
    background-color: var(--color-ink);
    border-radius: 2px;
    position: absolute;
    transition: transform 0.15s ease;
}

.hamburger-inner { top: 50%; transform: translateY(-50%); }
.hamburger-inner::before { content: ""; top: -7px; }
.hamburger-inner::after { content: ""; top: 7px; }

/* Mobile Menu Accordion Drawer */
.mobile-menu-drawer {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg-card);
    z-index: 999;
    overflow-y: auto;
    padding: 1.25rem;
    flex-direction: column;
    gap: 0.875rem;
    box-shadow: var(--shadow-xl);
}

body.menu-open .mobile-menu-drawer {
    display: flex;
}

.mobile-accordion-item {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.mobile-accordion-title {
    width: 100%;
    background: var(--color-bg-main);
    border: none;
    padding: 0.875rem 1rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9375rem;
    color: var(--color-ink);
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    min-height: 44px;
}

.mobile-accordion-content {
    display: none;
    padding: 0.625rem 1rem;
    background: var(--color-bg-card);
    flex-direction: column;
    gap: 0.35rem;
}

.mobile-accordion-item.active .mobile-accordion-content {
    display: flex;
}

.mobile-accordion-content a {
    font-size: 0.875rem;
    color: var(--color-muted);
    padding: 6px 0;
    display: flex;
    align-items: center;
    min-height: 40px;
    text-decoration: none;
}

/* Module 2 Language Pills Row */
.module2-header-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 10px;
    min-width: 0;
}

.module2-pills-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    min-width: 0;
}

/* HS Decode Visual Hierarchy Tree */
.decode-visual {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.75rem;
    margin: 1rem 0 1.25rem;
    min-width: 0;
}

.decode-tile {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1rem 0.75rem;
    box-shadow: var(--shadow-sm);
    text-align: center;
    min-width: 0;
}

.decode-tile.active {
    border: 2px solid var(--color-accent);
    background-color: var(--color-accent-light);
}

.decode-code {
    font-family: var(--font-body);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-accent);
    margin: 0.2rem 0;
    font-variant-numeric: tabular-nums;
}

/* Country Switcher Strip with Scroll Snap */
.switcher-header {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 0.875rem;
    min-width: 0;
}

.pill-strip-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--color-border);
    min-width: 0;
}

.pill-strip {
    display: flex;
    gap: 0.35rem;
    width: max-content;
    min-width: 100%;
}

.pill-tab {
    scroll-snap-align: center;
    flex: 0 0 auto;
    background-color: var(--color-accent-light);
    color: var(--color-muted);
    border: 1px solid var(--color-border);
    padding: 6px 12px;
    border-radius: var(--radius-pill);
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    min-height: 36px;
}

.pill-tab.active {
    background-color: var(--color-accent);
    color: #FFFFFF;
    border-color: var(--color-accent);
}

.pill-tab.disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

/* Duty Badges (Allow Text Wrapping for Long PGA Flags) */
.duty-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.875rem;
    font-variant-numeric: tabular-nums;
    max-width: 100%;
    white-space: normal;
    overflow-wrap: break-word;
    word-break: break-word;
}

.duty-badge.badge-free {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.duty-badge.badge-high {
    background-color: var(--color-error-bg);
    color: var(--color-error);
}

.duty-badge.badge-mid {
    background-color: #FEF3C7;
    color: #B45309;
}

/* YMYL Disclaimer Box */
.ymyl-box {
    background-color: var(--color-bg-main);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.875rem;
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--color-muted);
    min-width: 0;
}

/* Data Tables */
.data-table-wrapper {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-sm);
    min-width: 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-bg-card);
    text-align: left;
    min-width: 500px;
}

.data-table th {
    background-color: var(--color-bg-main);
    color: var(--color-ink);
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 700;
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-border);
}

.data-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.875rem;
}

.data-table tr:nth-child(even) {
    background-color: var(--color-bg-main);
}

.data-table td.code-cell {
    font-weight: 700;
    color: var(--color-accent);
    font-variant-numeric: tabular-nums;
}

/* Form Responsiveness & Stacking */
.form-input-group {
    display: flex;
    gap: 8px;
    min-width: 0;
    width: 100%;
}

.cf-turnstile-wrapper {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

/* FAQ Accordion */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
    margin: 1.25rem 0;
    min-width: 0;
}

details.faq-item {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.875rem 1rem;
    box-shadow: var(--shadow-sm);
    min-width: 0;
}

summary.faq-title {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-ink);
    cursor: pointer;
    outline: none;
}

.faq-content {
    margin-top: 0.625rem;
    color: var(--color-muted);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Footer */
.footer {
    margin-top: auto;
    background-color: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding: 2.5rem 0 1.75rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.75rem;
    min-width: 0;
}

.footer-col ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.footer-col a {
    color: var(--color-muted);
    font-size: 0.8125rem;
}

.footer-col a:hover {
    color: var(--color-accent);
}

/* Responsive Rules for 375px Mobile Viewports */
@media (max-width: 900px) {
    .nav-desktop { display: none; }
    .mobile-nav-toggle { display: flex; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
    h1, .display-xl { font-size: 2rem; }
    h2 { font-size: 1.35rem; }
    .footer-grid { grid-template-columns: 1fr; }
    .decode-visual { grid-template-columns: 1fr; }
    .card, .glass-panel, .extractable-answer { padding: 0.875rem; }
    .container { padding-left: 0.75rem; padding-right: 0.75rem; }
    .form-input-group { flex-direction: column; }
    .form-input-group .btn { width: 100%; }
    .share-buttons-group { width: 100%; margin-left: 0; margin-top: 6px; }
}

/* -----------------------------------------------------------------------------
   DESIGN.md §13 PRINT DESIGN SYSTEM (@media print)
   Rebuilds window.print() output as a light-mode customs entry worksheet
   ----------------------------------------------------------------------------- */
@media print {
    @page {
        size: letter;
        margin: 1.5cm;
    }

    body {
        background: #ffffff !important;
        color: #111827 !important;
        font-family: 'Inter', system-ui, sans-serif !important;
        font-size: 10.5pt !important;
        line-height: 1.5 !important;
    }

    /* Hide web navigation, headers, footers, and interactive elements */
    header, footer, nav, .header-nav, .action-bar-container, .share-buttons-group,
    .module2-pills-row, .ymyl-box, form, button, .cf-turnstile-wrapper,
    .pill-strip, input, select, #search-dropdown, .mobile-nav-toggle {
        display: none !important;
    }

    /* Show print-only header & footer */
    .print-only-header {
        display: block !important;
        margin-bottom: 20px !important;
        border-bottom: 2px solid #0F7A52 !important;
        padding-bottom: 12px !important;
    }

    .print-only-footer {
        display: block !important;
        margin-top: 30px !important;
        border-top: 1px solid #CBD5E1 !important;
        padding-top: 10px !important;
        font-size: 8.5pt !important;
        color: #64748B !important;
    }

    /* Clean light surfaces */
    .card, .glass-panel, .extractable-answer, .data-table-wrapper {
        background: #ffffff !important;
        border: 1px solid #E2E8F0 !important;
        box-shadow: none !important;
        padding: 12px !important;
        margin-bottom: 16px !important;
        page-break-inside: avoid !important;
    }

    h1, h2, h3, h4 {
        color: #0F172A !important;
        page-break-after: avoid !important;
    }

    a {
        color: #111827 !important;
        text-decoration: none !important;
    }

    .duty-badge {
        border: 1px solid #0F172A !important;
        background: #F8FAFC !important;
        color: #0F172A !important;
        font-weight: 700 !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .tabular-nums {
        font-variant-numeric: tabular-nums !important;
    }

    table.data-table {
        width: 100% !important;
        border-collapse: collapse !important;
        font-size: 9.5pt !important;
    }

    table.data-table th, table.data-table td {
        border: 1px solid #CBD5E1 !important;
        padding: 6px 8px !important;
    }

    table.data-table th {
        background-color: #F1F5F9 !important;
        color: #0F172A !important;
        font-weight: 700 !important;
    }
}