/* ================================================================
   HeTangSEO — Theme CSS
   Header + Footer + Shared tokens
   Compatible with Bootstrap 5.3.x
   WordPress: enqueue via functions.php as theme.css
================================================================ */


/* ================================================================
   0. CSS CUSTOM PROPERTIES (Design Tokens)
================================================================ */
:root {
    /* ── Brand palette ── */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --accent: #06b6d4;

    /* ── Neutrals ── */
    --dark: #111827;
    --dark-mid: #1f2937;
    --dark-soft: #374151;
    --gray: #6b7280;
    --gray-light: #9ca3af;
    --border: #e5e7eb;
    --border-soft: #f3f4f6;
    --light: #ffffff;
    --off-white: #f9fafb;

    /* ── Footer specific ── */
    --footer-bg: #0f172a;
    --footer-border: rgba(255, 255, 255, .07);
    --footer-text: rgba(255, 255, 255, .55);
    --footer-link: rgba(255, 255, 255, .65);
    --footer-heading: rgba(255, 255, 255, .9);

    /* ── Typography ── */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter',
        Helvetica, Arial, sans-serif, 'Apple Color Emoji';
    --font-size-base: 15px;
    --line-height: 1.7;

    /* ── Spacing ── */
    --nav-height: 72px;
    --container-max: 1200px;

    /* ── Radii ── */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;

    /* ── Shadows ── */
    --shadow-xs: 0 1px 3px rgba(0, 0, 0, .06), 0 1px 2px rgba(0, 0, 0, .04);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, .07), 0 1px 3px rgba(0, 0, 0, .05);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, .09), 0 2px 8px rgba(0, 0, 0, .06);
    --shadow-nav: 0 1px 0 var(--border), 0 4px 24px rgba(0, 0, 0, .06);

    /* ── Transitions ── */
    --transition-fast: 150ms cubic-bezier(.4, 0, .2, 1);
    --transition-base: 220ms cubic-bezier(.4, 0, .2, 1);
    --transition-slow: 350ms cubic-bezier(.4, 0, .2, 1);
}


/* ================================================================
   1. RESET / BASE OVERRIDES
================================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--dark);
    background-color: var(--light);
    line-height: var(--line-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}


/* ================================================================
   2. SHARED UTILITIES
================================================================ */

/* Logo — used in header & footer */
.ht-logo {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -.035em;
    line-height: 1;
    gap: 0;
}

.ht-logo:hover {
    text-decoration: none;
    opacity: .9;
}

.ht-logo-dark {
    color: var(--dark);
}

.ht-logo-accent {
    color: var(--primary);
}

/* ── CTA Button — primary ── */
.ht-btn-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .35rem;
    background-color: var(--primary);
    color: var(--light) !important;
    border: 1.5px solid var(--primary);
    border-radius: var(--radius-full);
    font-size: .82rem;
    font-weight: 600;
    letter-spacing: .01em;
    padding: .5rem 1.15rem;
    line-height: 1.4;
    white-space: nowrap;
    text-decoration: none;
    cursor: pointer;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}

.ht-btn-cta:hover,
.ht-btn-cta:focus-visible {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, .18);
    transform: translateY(-1px);
    color: var(--light) !important;
    text-decoration: none;
}

.ht-btn-cta:active {
    transform: translateY(0);
    box-shadow: none;
}

/* ── CTA Button — small (footer) ── */
.ht-btn-cta-sm {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    background-color: transparent;
    color: var(--primary) !important;
    border: 1.5px solid rgba(37, 99, 235, .35);
    border-radius: var(--radius-full);
    font-size: .78rem;
    font-weight: 600;
    padding: .4rem 1rem;
    text-decoration: none;
    white-space: nowrap;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast);
}

.ht-btn-cta-sm:hover,
.ht-btn-cta-sm:focus-visible {
    background-color: var(--primary);
    border-color: var(--primary);
    color: var(--light) !important;
}

/* ── Chevron icon ── */
.ht-chevron {
    font-size: .7rem;
    transition: transform var(--transition-base);
    margin-left: .2rem;
    display: inline-block;
}

.show>.ht-nav-link--dropdown .ht-chevron,
[aria-expanded="true"] .ht-chevron {
    transform: rotate(180deg);
}


/* ================================================================
   3. HEADER
================================================================ */
.ht-header {
    position: sticky;
    top: 0;
    z-index: 1030;
    background-color: rgba(255, 255, 255, .96);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

/* Scrolled state — JS adds .ht-header--scrolled */
.ht-header--scrolled {
    border-bottom-color: transparent;
    box-shadow: var(--shadow-nav);
}

/* ── Navbar ── */
.ht-navbar {
    padding-top: 0;
    padding-bottom: 0;
    height: var(--nav-height);
}

.ht-nav-container {
    max-width: var(--container-max);
    height: 100%;
}

/* ── Logo in header ── */
.ht-header .ht-logo {
    font-size: 1.15rem;
    margin-right: .5rem;
}

/* ── Desktop nav menu ── */
.ht-nav-collapse {
    height: 100%;
}

.ht-nav-menu {
    height: 100%;
    align-items: center;
    gap: .1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

/* ── Nav link — base ── */
.ht-nav-link {
    display: inline-flex;
    align-items: center;
    padding: .38rem .7rem !important;
    font-size: .84rem;
    font-weight: 500;
    color: var(--dark-soft) !important;
    border-radius: var(--radius-sm);
    text-decoration: none;
    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
    position: relative;
}

/* ── Nav link — hover ── */
.ht-nav-link:hover {
    color: var(--dark) !important;
    background-color: var(--off-white);
}

/* ── Nav link — active ── */
.ht-nav-link.active {
    color: var(--primary) !important;
    background-color: var(--primary-light);
    font-weight: 600;
}

/* ── Nav link — dropdown trigger hover ── */
.ht-nav-link--dropdown::after {
    display: none;
    /* hide Bootstrap's default caret */
}

/* ── Dropdown menu ── */
.ht-dropdown {
    min-width: 300px;
    padding: .5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    background-color: var(--light);
    margin-top: .5rem !important;

    /* Animate in */
    animation: htDropdownIn var(--transition-base) forwards;
    transform-origin: top center;
}

@keyframes htDropdownIn {
    from {
        opacity: 0;
        transform: translateY(-6px) scale(.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ── Dropdown item ── */
.ht-dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    padding: .65rem .8rem !important;
    border-radius: var(--radius-md);
    color: var(--dark) !important;
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.ht-dropdown-item:hover,
.ht-dropdown-item:focus {
    background-color: var(--off-white);
    color: var(--dark) !important;
}

.ht-dropdown-icon {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: .95rem;
    margin-top: .05rem;
}

.ht-dropdown-text {
    display: flex;
    flex-direction: column;
    gap: .1rem;
    line-height: 1.35;
}

.ht-dropdown-text strong {
    font-size: .85rem;
    font-weight: 600;
    color: var(--dark);
}

.ht-dropdown-text small {
    font-size: .75rem;
    color: var(--gray);
    font-weight: 400;
}

/* ── Mobile hamburger toggler ── */
.ht-toggler {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.ht-toggler:hover {
    background-color: var(--off-white);
    border-color: var(--gray-light);
}

.ht-toggler:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.ht-toggler-bar {
    display: block;
    width: 100%;
    height: 1.5px;
    background-color: var(--dark);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Focus visible styles — global */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}


/* ================================================================
   4. OFFCANVAS (Mobile Menu)
================================================================ */
.ht-offcanvas {
    width: min(320px, 88vw) !important;
    background-color: var(--light);
    border-left: 1px solid var(--border);
    box-shadow: -8px 0 40px rgba(0, 0, 0, .1);
}

.ht-offcanvas-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.35rem;
    border-bottom: 1px solid var(--border);
}

.ht-offcanvas-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--dark-soft);
    font-size: 1rem;
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.ht-offcanvas-close:hover {
    background-color: var(--off-white);
    border-color: var(--gray-light);
}

.ht-offcanvas-body {
    padding: 1rem 1.25rem 2rem;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.ht-offcanvas-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: .15rem;
}

/* ── Mobile nav link ── */
.ht-offcanvas-link {
    display: flex;
    align-items: center;
    width: 100%;
    padding: .65rem .75rem;
    font-size: .9rem;
    font-weight: 500;
    color: var(--dark-soft);
    text-decoration: none;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    cursor: pointer;
    transition: color var(--transition-fast), background-color var(--transition-fast);
    text-align: left;
}

.ht-offcanvas-link:hover {
    color: var(--dark);
    background-color: var(--off-white);
}

.ht-offcanvas-link.active {
    color: var(--primary);
    background-color: var(--primary-light);
    font-weight: 600;
}

/* Accordion button variant */
.ht-offcanvas-accordion {
    display: flex;
    align-items: center;
}

/* ── Mobile sub-menu ── */
.ht-offcanvas-sub {
    list-style: none;
    padding: .35rem 0 .35rem 1rem;
    margin: .15rem 0 0;
    border-left: 2px solid var(--border);
}

.ht-offcanvas-sub li {
    margin-bottom: .1rem;
}

.ht-offcanvas-sub a {
    display: block;
    padding: .45rem .65rem;
    font-size: .84rem;
    font-weight: 500;
    color: var(--gray);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.ht-offcanvas-sub a:hover {
    color: var(--primary);
    background-color: var(--primary-light);
}

/* ── Mobile CTA ── */
.ht-offcanvas-cta {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    margin-top: 1rem;
}


/* ================================================================
   5. FOOTER
================================================================ */
.ht-footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    font-size: .875rem;
}

/* ── Footer main content area ── */
.ht-footer-main {
    padding: 72px 0 56px;
}

/* ── Four-column grid ── */
.ht-footer-grid {
    gap: 2.5rem 1.5rem;
}

/* ── Brand column ── */
.ht-footer-col--brand {
    /* slightly wider on large screens */
}

/* ── Logo in footer ── */
.ht-logo--footer .ht-logo-dark {
    color: var(--light);
}

.ht-logo--footer .ht-logo-accent {
    color: var(--primary);
}

/* ── Tagline ── */
.ht-footer-tagline {
    margin-top: .9rem;
    font-size: .82rem;
    line-height: 1.65;
    color: var(--footer-text);
    max-width: 260px;
}

/* ── Social icons ── */
.ht-footer-socials {
    display: flex;
    gap: .5rem;
    margin-top: 1.25rem;
}

.ht-social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--footer-border);
    color: var(--footer-link);
    font-size: .9rem;
    text-decoration: none;
    transition:
        border-color var(--transition-fast),
        color var(--transition-fast),
        background-color var(--transition-fast);
}

.ht-social-icon:hover {
    border-color: var(--primary);
    color: var(--primary);
    background-color: rgba(37, 99, 235, .08);
}

/* ── Footer column headings ── */
.ht-footer-heading {
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .09em;
    text-transform: uppercase;
    color: var(--footer-heading);
    margin-bottom: 1.1rem;
}

/* ── Footer navigation links ── */
.ht-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: .55rem;
}

.ht-footer-links a {
    color: var(--footer-link);
    text-decoration: none;
    font-size: .84rem;
    font-weight: 400;
    transition: color var(--transition-fast), padding-left var(--transition-fast);
    display: inline-block;
}

.ht-footer-links a:hover {
    color: var(--light);
    padding-left: .25rem;
}

/* ── Contact list ── */
.ht-footer-contact-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: .7rem;
}

.ht-footer-contact-list li {
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    font-size: .84rem;
    color: var(--footer-link);
    line-height: 1.5;
}

.ht-footer-contact-list li i {
    color: var(--primary);
    font-size: .85rem;
    flex-shrink: 0;
    margin-top: .18rem;
}

.ht-footer-contact-list a {
    color: var(--footer-link);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.ht-footer-contact-list a:hover {
    color: var(--light);
}

/* ── Footer bottom bar ── */
.ht-footer-bottom {
    border-top: 1px solid var(--footer-border);
    padding: 1.25rem 0;
}

.ht-footer-bottom-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .75rem;
}

.ht-copyright {
    margin: 0;
    font-size: .78rem;
    color: rgba(255, 255, 255, .3);
}

/* ── Legal nav ── */
.ht-footer-legal {
    display: flex;
    align-items: center;
    gap: .6rem;
}

.ht-footer-legal a {
    font-size: .78rem;
    color: rgba(255, 255, 255, .3);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.ht-footer-legal a:hover {
    color: rgba(255, 255, 255, .7);
}

.ht-footer-legal-divider {
    color: rgba(255, 255, 255, .2);
    font-size: .75rem;
}


/* ================================================================
   6. RESPONSIVE ADJUSTMENTS
================================================================ */

/* ── lg and above — ensure nav fills height ── */
@media (min-width: 992px) {
    .ht-nav-collapse {
        display: flex !important;
        align-items: center;
    }

    /* Dropdown trigger parent fills nav height for larger hit target */
    .ht-nav-menu>.nav-item {
        height: 100%;
        display: flex;
        align-items: center;
    }

    .ht-nav-menu>.nav-item>.ht-nav-link {
        height: 100%;
        display: inline-flex;
        align-items: center;
        border-radius: 0;
        border-bottom: 2px solid transparent;
        padding-left: .75rem !important;
        padding-right: .75rem !important;
    }

    .ht-nav-menu>.nav-item>.ht-nav-link:hover {
        background: none;
        color: var(--dark) !important;
        border-bottom-color: var(--border);
    }

    .ht-nav-menu>.nav-item>.ht-nav-link.active {
        background: none;
        color: var(--primary) !important;
        border-bottom-color: var(--primary);
    }
}

/* ── Tablet ── */
@media (max-width: 991.98px) {
    :root {
        --nav-height: 64px;
    }

    .ht-footer-main {
        padding: 56px 0 44px;
    }

    .ht-footer-tagline {
        max-width: none;
    }
}

/* ── Mobile ── */
@media (max-width: 575.98px) {
    :root {
        --nav-height: 60px;
    }

    .ht-footer-main {
        padding: 48px 0 36px;
    }

    .ht-footer-grid {
        gap: 2rem 1rem;
    }

    .ht-footer-bottom-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: .5rem;
    }
}


/* ================================================================
   7. REDUCED MOTION
================================================================ */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
}


/* ================================================================
   8. PRINT
================================================================ */
@media print {

    .ht-header,
    .ht-footer {
        display: none;
    }
}