:root {
    --color-bg: #f8fafc;
    --color-card-bg: #ffffff;
    --color-text: #0f172a;
    --color-muted: #64748b;
    --color-border: #e2e8f0;
    --color-primary: #10b981;
    --color-primary-dark: #059669;
    --color-primary-light: #ecfdf5;
    --color-secondary: #0ea5e9;
    --color-accent: #6366f1;
    --color-dark-bg: #080c14;
    --color-dark-surface: #0f172a;
    --color-dark-border: #1e293b;
    --color-dark-text: #f1f5f9;
    --color-dark-muted: #94a3b8;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --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: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --container-max: 1260px;
}

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

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

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

.main-content {
    flex: 1;
    padding: 30px 0 60px 0;
}

/* Header */
.site-header {
    background: #ffffff;
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0,0,0,0.03);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--color-text);
}

.brand-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(16,185,129,0.1), rgba(14,165,233,0.1));
    border-radius: var(--radius-sm);
    padding: 6px;
}

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

.brand-name {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #0f172a;
}

.brand-name .highlight {
    background: linear-gradient(135deg, #10b981, #0ea5e9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand-tagline {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-link {
    text-decoration: none;
    color: var(--color-muted);
    font-weight: 600;
    font-size: 0.92rem;
    transition: color 0.15s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-primary-dark);
}

.btn-header {
    background: var(--color-primary);
    color: #ffffff !important;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.88rem;
    transition: background-color 0.2s ease;
}

.btn-header:hover {
    background: var(--color-primary-dark);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text);
    padding: 6px;
}

.mobile-nav-drawer {
    display: none;
    flex-direction: column;
    background: #ffffff;
    border-bottom: 1px solid var(--color-border);
    padding: 16px 20px;
    gap: 12px;
}

.mobile-nav-drawer.is-open {
    display: flex;
}

.mobile-nav-drawer .nav-link {
    padding: 8px 0;
}

/* Hero Section */
.hero-section {
    text-align: center;
    max-width: 840px;
    margin: 0 auto 36px auto;
}

.badge-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 5px 12px;
    border-radius: 9999px;
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: #0f172a;
    margin-bottom: 14px;
}

.hero-subtitle {
    font-size: 1.12rem;
    color: var(--color-muted);
    line-height: 1.6;
}

/* Breadcrumbs */
.breadcrumb-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--color-muted);
    margin-bottom: 16px;
    justify-content: center;
}

.breadcrumb-nav a {
    color: var(--color-muted);
    text-decoration: none;
}

.breadcrumb-nav a:hover {
    color: var(--color-primary-dark);
}

.breadcrumb-nav .active {
    color: var(--color-text);
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 700;
    font-size: 0.95rem;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: #ffffff;
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

.btn-primary:hover {
    opacity: 0.95;
    transform: translateY(-1px);
}

.btn-secondary {
    background: #0f172a;
    color: #ffffff;
}

.btn-secondary:hover {
    background: #1e293b;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.btn-outline:hover {
    background: #f1f5f9;
    border-color: #cbd5e1;
}

.btn-full {
    width: 100%;
}

/* Grids & Cards */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 28px;
    margin-bottom: 48px;
}

.calculator-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-sm);
}

.card-header-flex {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 16px;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 4px;
}

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

.method-indicator {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-size: 0.78rem;
    font-weight: 700;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

/* Sidebar Column */
.sidebar-column {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 22px;
    box-shadow: var(--shadow-sm);
}

.sidebar-card.highlight-card {
    background: linear-gradient(135deg, #ffffff, #f0fdf4);
    border-color: #86efac;
}

.sidebar-card-badge {
    display: inline-block;
    background: #dcfce7;
    color: #166534;
    font-size: 0.72rem;
    font-weight: 800;
    padding: 3px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.sidebar-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 8px;
}

.sidebar-card-text {
    font-size: 0.88rem;
    color: var(--color-muted);
    line-height: 1.5;
    margin-bottom: 16px;
}

.sidebar-links-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sidebar-links-list li a {
    color: #0ea5e9;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: color 0.15s ease;
}

.sidebar-links-list li a:hover {
    color: #0369a1;
    text-decoration: underline;
}

/* Content Sections & Tables */
.content-section {
    margin-bottom: 50px;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 28px auto;
}

.section-header-flex {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 20px;
}

.section-title {
    font-size: 1.7rem;
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--color-muted);
}

.view-all-link {
    color: var(--color-primary-dark);
    font-weight: 700;
    font-size: 0.92rem;
    text-decoration: none;
    white-space: nowrap;
}

.view-all-link:hover {
    text-decoration: underline;
}

.table-container {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow-x: auto;
    box-shadow: var(--shadow-sm);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.92rem;
}

.data-table th {
    background: #f8fafc;
    color: var(--color-muted);
    font-weight: 700;
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.data-table td {
    padding: 14px 18px;
    border-bottom: 1px solid #f1f5f9;
    color: var(--color-text);
}

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

.data-table code {
    background: #f1f5f9;
    color: #0f172a;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.85rem;
}

/* State & Days Pills Grids */
.state-pills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 14px;
}

.state-pill-card {
    display: flex;
    align-items: center;
    gap: 14px;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 12px 16px;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.state-pill-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.state-abbr {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    font-weight: 800;
    font-size: 0.95rem;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
}

.state-pill-info {
    display: flex;
    flex-direction: column;
}

.state-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: #0f172a;
}

.state-meta {
    font-size: 0.78rem;
    color: var(--color-muted);
}

.days-pills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 10px;
}

.day-badge-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 10px 6px;
    text-decoration: none;
    color: inherit;
    transition: all 0.15s ease;
}

.day-badge-link:hover {
    border-color: var(--color-secondary);
    background: #f0f9ff;
    transform: translateY(-1px);
}

.day-badge-link strong {
    font-size: 1.15rem;
    color: #0f172a;
}

.day-badge-link span {
    font-size: 0.72rem;
    color: var(--color-muted);
}

/* Article & Editorial Container */
.article-container {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    box-shadow: var(--shadow-sm);
}

.article-body h2 {
    font-size: 1.6rem;
    font-weight: 800;
    margin: 28px 0 14px 0;
    color: #0f172a;
}

.article-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 22px 0 10px 0;
    color: #1e293b;
}

.article-body p {
    font-size: 1rem;
    line-height: 1.7;
    color: #334155;
    margin-bottom: 16px;
}

.article-body ul, .article-body ol {
    margin: 0 0 20px 24px;
    color: #334155;
    line-height: 1.7;
}

.example-box {
    background: #f8fafc;
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 20px 24px;
    margin: 24px 0;
}

.example-box h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #0f172a;
}

.highlight-result {
    margin-top: 14px;
    font-size: 1.1rem;
    color: var(--color-primary-dark);
}

/* FAQ Accordion */
.faq-accordion {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.2s ease;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 18px 22px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1.02rem;
    font-weight: 700;
    color: #0f172a;
    text-align: left;
    cursor: pointer;
}

.faq-question:hover {
    color: var(--color-primary-dark);
}

.faq-chevron {
    transition: transform 0.2s ease;
    flex-shrink: 0;
    color: var(--color-muted);
}

.faq-item.is-open .faq-chevron {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding: 0 22px 20px 22px;
    font-size: 0.95rem;
    color: #475569;
    line-height: 1.65;
}

.faq-item.is-open .faq-answer {
    display: block;
}

/* Footer (Dark Matching Codexa Tools) */
.site-footer {
    background-color: var(--color-dark-bg);
    color: var(--color-dark-text);
    border-top: 1px solid var(--color-dark-border);
    padding: 60px 0 30px 0;
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--color-dark-muted);
    line-height: 1.6;
    max-width: 320px;
}

.footer-col h3 {
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #ffffff;
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: var(--color-dark-muted);
    text-decoration: none;
    font-size: 0.88rem;
    transition: color 0.15s ease;
}

.footer-links a:hover {
    color: #ffffff;
}

.footer-bottom {
    border-top: 1px solid var(--color-dark-border);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--color-dark-muted);
    flex-wrap: wrap;
    gap: 12px;
}

.footer-badges {
    display: flex;
    gap: 10px;
}

.status-badge {
    background: #1e293b;
    color: #10b981;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 9999px;
    border: 1px solid #334155;
}

/* Admin Dashboard Specific */
.admin-page-header {
    margin-bottom: 28px;
}

.admin-title {
    font-size: 2rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 6px;
}

.admin-desc {
    font-size: 0.95rem;
    color: var(--color-muted);
}

.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.admin-stat-card {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.stat-meta {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.stat-hint {
    font-size: 0.82rem;
    color: var(--color-muted);
}

.text-success { color: #10b981; }
.text-warning { color: #f59e0b; }
.text-neutral { color: #64748b; }
.text-primary { color: var(--color-primary-dark); }

.admin-two-col {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

.admin-card {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}

.admin-card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 6px;
}

.admin-card-desc {
    font-size: 0.88rem;
    color: var(--color-muted);
    margin-bottom: 20px;
}

.admin-quick-actions {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.admin-quick-actions a {
    display: flex;
    flex-direction: column;
    padding: 12px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition: all 0.2s ease;
}

.admin-quick-actions a:hover {
    border-color: var(--color-primary);
    background: #f0fdf4;
}

.admin-quick-actions strong {
    font-size: 0.95rem;
    color: #0f172a;
}

.admin-quick-actions span {
    font-size: 0.82rem;
    color: var(--color-muted);
}

.admin-table-wrap {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.admin-table th {
    background: #f8fafc;
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.8rem;
    font-weight: 700;
    text-align: left;
    color: var(--color-muted);
}

.admin-table td {
    padding: 12px 14px;
    border-bottom: 1px solid #f1f5f9;
}

/* Forms Common */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 0.88rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    box-sizing: border-box;
    background: #ffffff;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-help {
    display: block;
    font-size: 0.8rem;
    color: var(--color-muted);
    margin-top: 4px;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 0.9rem;
    color: #334155;
    cursor: pointer;
}

.checkbox-label input {
    margin-top: 3px;
    width: 16px;
    height: 16px;
}

/* Search bar on state hub */
.search-filter-box {
    max-width: 600px;
    margin: 0 auto 32px auto;
}

.search-input {
    font-size: 1rem;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

/* State cards inside State Hub */
.states-grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.state-card {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.state-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.state-card-abbr {
    background: #ecfdf5;
    color: #065f46;
    font-weight: 800;
    font-size: 1rem;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
}

.state-card-name {
    font-size: 1.2rem;
    font-weight: 700;
    color: #0f172a;
}

.state-info-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.88rem;
    padding: 6px 0;
    border-bottom: 1px solid #f8fafc;
}

.state-info-row .info-label {
    color: var(--color-muted);
}

.state-info-row .info-val {
    font-weight: 600;
    color: #1e293b;
}

.state-summary-text {
    font-size: 0.85rem;
    color: var(--color-muted);
    margin: 14px 0 16px 0;
    line-height: 1.5;
    flex: 1;
}

/* Days Hub Grid */
.days-hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 48px;
}

.days-hub-card {
    background: #ffffff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
}

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

.days-hub-card-header {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 10px;
}

.days-number {
    font-size: 1.8rem;
    font-weight: 800;
    color: #0f172a;
}

.days-unit {
    font-size: 0.88rem;
    color: var(--color-muted);
    font-weight: 600;
}

.days-ratio-bar {
    width: 100%;
    height: 6px;
    background: #f1f5f9;
    border-radius: 9999px;
    overflow: hidden;
    margin-bottom: 10px;
}

.days-ratio-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981, #0ea5e9);
    border-radius: 9999px;
}

.days-stats-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.72rem;
    color: var(--color-muted);
    margin-bottom: 10px;
}

.days-hub-view {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-top: auto;
}

/* 375px Mobile Responsive Rules */
@media (max-width: 900px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .admin-two-col {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero-title {
        font-size: 1.9rem;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
    .card-header-flex {
        flex-direction: column;
    }
}
@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    .main-content {
        padding: 16px 0 40px 0;
    }
    .hero-section {
        margin-bottom: 24px;
    }
    .hero-title {
        font-size: 1.6rem;
    }
    .hero-subtitle {
        font-size: 0.95rem;
    }
    .calculator-card {
        padding: 18px 12px;
        border-radius: var(--radius-md);
    }
    .card-title {
        font-size: 1.25rem;
    }
    .card-desc {
        font-size: 0.85rem;
    }
    .card-header-flex {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .method-indicator {
        font-size: 0.72rem;
        padding: 4px 8px;
    }
    .article-container {
        padding: 20px 14px;
    }
}