/**
 * Public site chrome — header & footer aligned with UI/home.html (lime pill nav + light footer).
 * Loaded after premium-theme.css so these rules win for layout chrome.
 */

 :root {
    --af-lime: #d4ff00;
    --af-lime-soft: #f1ff99;
    --af-dark: #0a0a0a;
    --af-charcoal: #1f2937;
    --af-page-bg: #fafafa;
    --af-white: #ffffff;
    --af-gray-200: #e5e7eb;
    --af-gray-500: #6b7280;
    --af-gray-600: #4b5563;
    --af-gray-700: #374151;
    --af-gray-800: #1f2937;
    --af-border-brand: 1.5px solid #1f2937;
    --af-shadow-soft: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --af-shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --af-shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --af-font-chrome: "Plus Jakarta Sans", system-ui, sans-serif;
    --af-ease: cubic-bezier(0.4, 0, 0.2, 1);
    --af-container-max: 80rem;
}

body {
    font-family: var(--af-font-chrome);
    margin: 0;
}

main {
    padding-top: 5.25rem;
}

@media (min-width: 768px) {
    main {
        padding-top: 5.75rem;
    }
}

.is-hidden {
    display: none !important;
}

.page-container {
    max-width: var(--af-container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

@media (min-width: 640px) {
    .page-container {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }
}

@media (min-width: 1024px) {
    .page-container {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

.u-visually-hidden-focus:focus {
    outline: none;
}

/* ----- Header (banner) ----- */
.site-chrome-header {
    margin: 0;
    padding: 0;
}

.site-navigation {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1030;
    transition: background-color 0.3s var(--af-ease), backdrop-filter 0.3s var(--af-ease);
    font-family: var(--af-font-chrome);
}

.site-navigation__wrapper {
    padding-top: 9px;
    padding-bottom: 0.5rem;
}

.site-navigation__bar {
    background-color: var(--af-lime);
    border: var(--af-border-brand);
    border-radius: 9999px;
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
    box-shadow: var(--af-shadow-soft);
    transition: box-shadow 0.25s var(--af-ease);
}

.site-navigation--scrolled .site-navigation__bar {
    box-shadow: var(--af-shadow-medium);
}

.site-brand {
    flex: 0 1 auto;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-left: 0.5rem;
    color: var(--af-dark);
    text-decoration: none;
}

.site-brand:hover {
    opacity: 0.92;
}

.site-brand .ph-student {
    flex-shrink: 0;
    font-size: 1.5rem;
    color: var(--af-dark);
}

.site-brand__name {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
    color: inherit;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.site-navigation__links {
    display: none;
    gap: 2rem;
    align-items: center;
    font-weight: 600;
    font-size: 0.875rem;
}

@media (min-width: 768px) {
    .site-navigation__links {
        display: flex;
    }
}

.site-navigation__link {
    color: var(--af-dark);
}

.site-navigation__link:hover {
    color: var(--af-gray-700);
    transition: color 0.2s ease;
}

.site-navigation__link--active {
    color: var(--af-gray-800);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.site-navigation__actions {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding-right: 0.25rem;
    flex-shrink: 0;
}

.site-navigation__desktop-cta {
    display: none;
    align-items: center;
    gap: 0.75rem;
}

@media (min-width: 768px) {
    .site-navigation__desktop-cta {
        display: flex;
    }
}

.site-navigation__icon-button {
    padding: 0.5rem;
    border-radius: 9999px;
    border: none;
    background: transparent;
    color: var(--af-dark);
    font: inherit;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.site-navigation__icon-button:hover {
    background-color: rgba(0, 0, 0, 0.05);
    transition: background-color 0.2s ease;
}

.site-navigation__icon-button .ph {
    font-size: 1.25rem;
}

.site-navigation__login {
    font-size: 0.875rem;
    font-weight: 700;
    padding: 0.5rem 1rem;
    color: var(--af-dark);
}

.site-navigation__login:hover {
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.site-navigation__signup {
    background-color: var(--af-dark);
    color: var(--af-white);
    font-size: 0.875rem;
    font-weight: 700;
    padding: 0.625rem 1.5rem;
    border-radius: 9999px;
}

.site-navigation__signup:hover {
    background-color: var(--af-gray-800);
    transition: background-color 0.2s ease;
}

.site-navigation__mobile-open {
    display: flex;
    align-items: center;
}

@media (min-width: 768px) {
    .site-navigation__mobile-open {
        display: none;
    }
}

.site-navigation__mobile-open button {
    border: none;
    background: transparent;
    color: var(--af-dark);
}

.site-navigation__mobile-open .ph-list,
.site-navigation__mobile-open .ph-x {
    font-size: 1.5rem;
}

.mobile-navigation-panel {
    display: none;
    background-color: var(--af-white);
    border-bottom: 1px solid var(--af-dark);
    position: absolute;
    width: 100%;
    top: 100%;
    left: 0;
    box-shadow: var(--af-shadow-large);
    z-index: 1029;
}

.mobile-navigation-panel.is-open {
    display: block;
}

@media (min-width: 768px) {
    .mobile-navigation-panel {
        display: none !important;
    }
}

.mobile-navigation-panel__inner {
    padding: 0.5rem 1rem 1.5rem;
    font-weight: 600;
}

.mobile-navigation-panel__inner > a {
    display: block;
    padding: 0.75rem;
    border-radius: 0.75rem;
    color: var(--af-dark);
}

.mobile-navigation-panel__inner > a:hover {
    background-color: var(--af-lime-soft);
    transition: background-color 0.2s ease;
}

.mobile-navigation-panel__inner > a.site-navigation__link--active {
    background-color: var(--af-lime-soft);
}

.mobile-navigation-panel__actions {
    border-top: 1px solid var(--af-gray-200);
    margin-top: 1rem;
    padding-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.mobile-navigation-panel__actions a {
    display: block;
    text-align: center;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border-radius: 9999px;
}

.mobile-navigation-panel__login {
    background-color: #f3f4f6;
    color: var(--af-dark);
}

.mobile-navigation-panel__signup {
    background-color: var(--af-dark);
    color: var(--af-white);
}

/* ----- Footer ----- */
.site-footer {
    background-color: var(--af-white);
    padding-top: 2rem;
    padding-bottom: 1rem;
    border-top: 1px solid var(--af-gray-200);
    font-family: var(--af-font-chrome);
    color: var(--af-dark);
}

.site-footer a {
    color: inherit;
    text-decoration: none;
}

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

@media (min-width: 768px) {
    .site-footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.site-footer__brand-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.site-footer__brand-row .ph-student {
    font-size: 1.5rem;
}

.site-footer__brand-name {
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.site-footer__tagline {
    color: var(--af-gray-500);
    font-size: 0.875rem;
    margin: 0 0 1.5rem;
    line-height: 1.6;
}

.site-footer__social {
    display: flex;
    gap: 1rem;
}

.site-footer__social-link {
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--af-page-bg);
    border: var(--af-border-brand);
    border-radius: 9999px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--af-dark);
}

.site-footer__social-link:hover {
    background-color: var(--af-lime);
    transition: background-color 0.2s ease;
}

.site-footer__social-link .ph {
    font-size: 1.25rem;
}

.site-footer__column-title {
    font-weight: 800;
    font-size: 1.125rem;
    margin: 0 0 1rem;
    color: var(--af-dark);
}

.site-footer__column-title--spaced {
    margin-top: 1.5rem;
}

.site-footer__links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-footer__links > li + li {
    margin-top: 0.75rem;
}

.site-footer__links a {
    color: var(--af-gray-600);
    font-size: 0.875rem;
    font-weight: 500;
}

.site-footer__links a:hover {
    color: var(--af-lime);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.site-footer__bottom {
    border-top: 1px solid var(--af-gray-200);
    padding-top: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

@media (min-width: 768px) {
    .site-footer__bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.site-footer__copyright {
    color: var(--af-gray-500);
    font-size: 0.875rem;
    font-weight: 500;
    margin: 0;
}

.site-footer__credit {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--af-gray-500);
    font-weight: 700;
}

.site-footer__credit .ph-rocket {
    color: var(--af-dark);
}