/**
 * Medical Coding Data - Design System & Responsive Stylesheet
 * High-performance, clean SaaS data software aesthetic.
 * Mobile-first responsive architecture.
 */

:root {
    --color-primary: #0A192F;
    --color-primary-light: #1E293B;
    --color-accent: #0D9488;
    --color-accent-hover: #0F766E;
    --color-blue: #2563EB;
    --color-blue-hover: #1D4ED8;
    --color-bg: #F8FAFC;
    --color-card-bg: #FFFFFF;
    --color-border: #E2E8F0;
    --color-border-dark: #CBD5E1;
    --color-text-main: #0F172A;
    --color-text-muted: #64748B;
    --color-text-light: #94A3B8;
    
    --color-success: #059669;
    --color-success-bg: #ECFDF5;
    --color-warning: #D97706;
    --color-warning-bg: #FFFBEB;
    --color-danger: #DC2626;
    --color-danger-bg: #FEF2F2;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
}

/* Base Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text-main);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-blue);
    text-decoration: none;
    transition: color 0.15s ease-in-out;
}
a:hover {
    color: var(--color-blue-hover);
    text-decoration: underline;
}

/* Layout Container */
.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

/* Header & Navigation */
.site-header {
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.brand-badge {
    background: var(--color-primary);
    color: #FFFFFF;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    letter-spacing: 0.05em;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1.15rem;
    line-height: 1.2;
}

.brand-sub {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
}

@media (min-width: 1024px) {
    .desktop-nav {
        display: flex;
        align-items: center;
        gap: 1.5rem;
    }
}

.nav-link {
    font-size: 0.925rem;
    font-weight: 600;
    color: var(--color-primary-light);
    text-decoration: none;
    padding: 0.5rem 0.25rem;
    position: relative;
}

.nav-link:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.nav-link.active {
    color: var(--color-accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-header-cpc {
    display: none;
    background-color: var(--color-accent);
    color: #FFFFFF;
    font-weight: 700;
    font-size: 0.875rem;
    padding: 0.6rem 1.15rem;
    border-radius: var(--radius-md);
    transition: background-color 0.15s ease;
}

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

@media (min-width: 768px) {
    .btn-header-cpc {
        display: inline-flex;
        align-items: center;
    }
}

/* Mobile Hamburger Toggle */
.mobile-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
}

@media (min-width: 1024px) {
    .mobile-toggle {
        display: none;
    }
}

.mobile-toggle span {
    width: 100%;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: all 0.2s ease;
}

/* Mobile Drawer */
.mobile-drawer-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 25, 47, 0.6);
    z-index: 999;
}

.mobile-drawer-backdrop.active {
    display: block;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    right: -320px;
    width: 300px;
    height: 100%;
    background-color: #FFFFFF;
    z-index: 1000;
    padding: 2rem 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

.mobile-drawer.active {
    right: 0;
}

.mobile-drawer-close {
    align-self: flex-end;
    background: none;
    border: none;
    font-size: 1.75rem;
    font-weight: 300;
    cursor: pointer;
    color: var(--color-text-muted);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-nav-link {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

/* Breadcrumbs */
.breadcrumbs-bar {
    background-color: #FFFFFF;
    border-bottom: 1px solid var(--color-border);
    padding: 0.75rem 0;
    font-size: 0.875rem;
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    gap: 0.5rem;
    color: var(--color-text-muted);
}

.breadcrumb-separator {
    color: var(--color-text-light);
    font-size: 0.75rem;
}

/* Hero Section */
.hero-search-section {
    background: linear-gradient(180deg, #0A192F 0%, #112240 100%);
    color: #FFFFFF;
    padding: 3.5rem 0 4rem;
    text-align: center;
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }
}

.hero-subtitle {
    font-size: 1.125rem;
    color: #94A3B8;
    max-width: 720px;
    margin: 0 auto 2rem;
    line-height: 1.6;
}

.search-box-wrap {
    max-width: 760px;
    margin: 0 auto;
    position: relative;
}

.search-form {
    display: flex;
    background: #FFFFFF;
    border-radius: var(--radius-lg);
    padding: 0.35rem;
    box-shadow: var(--shadow-lg);
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 1.05rem;
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    color: var(--color-text-main);
    width: 100%;
}

.search-btn {
    background-color: var(--color-accent);
    color: #FFFFFF;
    border: none;
    border-radius: var(--radius-md);
    padding: 0 1.75rem;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.search-btn:hover {
    background-color: var(--color-accent-hover);
}

.search-chips {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.25rem;
    font-size: 0.875rem;
}

.chip-label {
    color: #94A3B8;
}

.chip-item {
    background: rgba(255, 255, 255, 0.1);
    color: #FFFFFF;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.8125rem;
    font-family: var(--font-mono);
}

.chip-item:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #FFFFFF;
    text-decoration: none;
}

/* Badges & Status Pills */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-billable {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid rgba(5, 150, 105, 0.3);
}

.badge-nonbillable {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid rgba(217, 119, 6, 0.3);
}

.badge-covered {
    background-color: #EFF6FF;
    color: var(--color-blue);
    border: 1px solid rgba(37, 99, 235, 0.3);
}

.badge-version {
    background-color: #F1F5F9;
    color: var(--color-primary-light);
    border: 1px solid var(--color-border);
}

/* Cards & Grid */
.grid-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin: 2rem 0;
}

@media (min-width: 640px) {
    .grid-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-cards {
        grid-template-columns: repeat(4, 1fr);
    }
}

.card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-border-dark);
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.card-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Data Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #FFFFFF;
    margin: 1.5rem 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.925rem;
}

.data-table th {
    background-color: #F1F5F9;
    color: var(--color-primary);
    font-weight: 700;
    padding: 0.85rem 1rem;
    border-bottom: 2px solid var(--color-border);
}

.data-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: top;
}

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

.data-table tr:hover {
    background-color: #F8FAFC;
}

.code-cell {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--color-blue);
    white-space: nowrap;
}

/* Section Header */
.section-header {
    margin: 3rem 0 1.5rem;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--color-text-muted);
}

/* Provenance / Data Trust Box */
.trust-bar {
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-accent);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin: 2rem 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.925rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
}

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

.btn-outline {
    background-color: transparent;
    border-color: var(--color-border-dark);
    color: var(--color-primary);
}
.btn-outline:hover {
    background-color: #F1F5F9;
    text-decoration: none;
}

/* Footer */
.site-footer {
    background-color: var(--color-primary);
    color: #94A3B8;
    padding: 4rem 0 2rem;
    margin-top: 5rem;
    font-size: 0.875rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    margin-bottom: 3rem;
}

@media (min-width: 640px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: 2fr repeat(4, 1fr);
    }
}

.footer-col-title {
    color: #FFFFFF;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.footer-link {
    color: #94A3B8;
}

.footer-link:hover {
    color: #FFFFFF;
    text-decoration: none;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    text-align: center;
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        text-align: left;
    }
}

.footer-disclaimer {
    max-width: 800px;
    font-size: 0.775rem;
    color: #64748B;
    line-height: 1.5;
}