/*
Theme Name: AI SCHOOL BD Theme
Author: AI SCHOOL BD
Description: Scalable education-first WordPress theme foundation for AI SCHOOL BD, with WooCommerce support and future LMS/AI integration boundaries.
Version: 1.3.3
Requires at least: 6.4
Requires PHP: 7.4
Text Domain: ai-school-bd
License: GPL-2.0-or-later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
*/

:root {
    --aisbd-color-primary: #2563eb;
    --aisbd-color-text: #111827;
    --aisbd-color-background: #ffffff;
}

html { box-sizing: border-box; }
*, *::before, *::after { box-sizing: inherit; }

body {
    margin: 0;
    color: var(--aisbd-color-text);
    background: var(--aisbd-color-background);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.aisbd-container {
    width: min(100% - 2rem, 1200px);
    margin-inline: auto;
}

.aisbd-card {
    padding: 1.5rem;
    border: 1px solid #e5e7eb;
    border-radius: 1rem;
    background: #fff;
}

.aisbd-card__title {
    margin: 0 0 0.75rem;
}

.aisbd-card__content {
    line-height: 1.7;
}

/* PHASE 03.2 — WordPress template layer */
.aisbd-page { padding: 2rem 0 4rem; }
.aisbd-entry__title { margin: 0 0 1rem; line-height: 1.15; }
.aisbd-entry__content { line-height: 1.75; }
.aisbd-entry__meta { opacity: .7; }
.aisbd-entry__thumbnail img { display: block; width: 100%; height: auto; border-radius: 1rem; }
.aisbd-post-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
.aisbd-post-card__image img { display: block; width: 100%; height: auto; border-radius: .75rem; }
.aisbd-post-card__title { margin: 1rem 0 .5rem; font-size: 1.25rem; }
.aisbd-post-card__title a { text-decoration: none; color: inherit; }
.aisbd-post-card__excerpt { line-height: 1.6; }
.aisbd-404__content { max-width: 700px; margin: 4rem auto; text-align: center; }
.aisbd-404__code { font-size: clamp(4rem, 12vw, 8rem); line-height: .9; margin: 0; font-weight: 800; }
.aisbd-button { display: inline-block; padding: .75rem 1.25rem; border-radius: .75rem; background: var(--aisbd-color-primary); color: #fff; text-decoration: none; border: 0; cursor: pointer; }
.aisbd-header__inner { display: flex; align-items: center; justify-content: space-between; gap: 2rem; min-height: 72px; }
.aisbd-primary-nav__list { display: flex; flex-wrap: wrap; gap: 1rem; list-style: none; margin: 0; padding: 0; }
@media (max-width: 900px) {
    .aisbd-post-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .aisbd-header__inner { align-items: flex-start; flex-direction: column; padding-block: 1rem; }
    .aisbd-post-list { grid-template-columns: 1fr; }
}

/* PHASE 03.2.2 — Functional search UI */
.aisbd-search-form { max-width: 760px; margin: 1.5rem 0 3rem; }
.aisbd-search-form__label { display: block; margin-bottom: .5rem; font-weight: 600; }
.aisbd-search-form__row { display: flex; gap: .75rem; align-items: stretch; }
.aisbd-search-form__input { flex: 1 1 auto; min-width: 0; padding: .85rem 1rem; border: 1px solid #c7cbd1; border-radius: .75rem; font: inherit; background: #fff; }
.aisbd-search-form__input:focus { outline: 2px solid currentColor; outline-offset: 2px; }
.aisbd-search-form__button { flex: 0 0 auto; }
.aisbd-search__results-title { margin: 0 0 1.5rem; }
.aisbd-search__empty { padding: 1.5rem; border: 1px solid #d9dde3; border-radius: .75rem; }
@media (max-width: 640px) { .aisbd-search-form__row { flex-direction: column; } }

/* PHASE 03.3 — Homepage Architecture & Component Integration */
:root {
    --aisbd-color-primary: #6d28d9;
    --aisbd-color-primary-strong: #5b21b6;
    --aisbd-color-primary-soft: #f3e8ff;
    --aisbd-color-text: #1f2937;
    --aisbd-color-muted: #6b7280;
    --aisbd-color-border: #e5e7eb;
    --aisbd-color-surface: #ffffff;
    --aisbd-color-surface-soft: #f8fafc;
    --aisbd-shadow-soft: 0 12px 30px rgba(17, 24, 39, .08);
    --aisbd-radius-sm: 10px;
    --aisbd-radius-md: 16px;
    --aisbd-radius-lg: 24px;
}

.screen-reader-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.aisbd-market-header {
    position: relative;
    z-index: 20;
    background: rgba(255,255,255,.98);
    border-bottom: 1px solid var(--aisbd-color-border);
}
.aisbd-market-header__inner {
    min-height: 78px;
    display: grid;
    grid-template-columns: auto auto minmax(280px, 1fr) auto auto;
    align-items: center;
    gap: 24px;
}
.aisbd-brand__text {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--aisbd-color-text);
    text-decoration: none;
    font-weight: 800;
    font-size: 1.35rem;
    white-space: nowrap;
}
.aisbd-brand__mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    color: #fff;
    background: linear-gradient(135deg, #7c3aed, #2563eb);
    font-size: .8rem;
}
.aisbd-brand .custom-logo-link { display: flex; align-items: center; }
.aisbd-brand .custom-logo { max-height: 48px; width: auto; }
.aisbd-header-link { color: var(--aisbd-color-text); text-decoration: none; font-size: .95rem; white-space: nowrap; }
.aisbd-header-link:hover, .aisbd-text-link:hover { color: var(--aisbd-color-primary); }
.aisbd-header-search { position: relative; }
.aisbd-header-search__icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--aisbd-color-muted); font-size: 1.35rem; pointer-events: none; }
.aisbd-header-search input {
    width: 100%;
    height: 50px;
    border: 1px solid #d8dee8;
    border-radius: 999px;
    padding: 0 18px 0 44px;
    font: inherit;
    background: #fff;
}
.aisbd-header-search input:focus { outline: 2px solid var(--aisbd-color-primary-soft); border-color: var(--aisbd-color-primary); }
.aisbd-primary-nav__list { display: flex; align-items: center; gap: 16px; list-style: none; margin: 0; padding: 0; }
.aisbd-primary-nav__list a { color: var(--aisbd-color-text); text-decoration: none; font-size: .9rem; }
.aisbd-header-actions { display: flex; align-items: center; gap: 10px; }
.aisbd-header-icon { text-decoration: none; font-size: 1.2rem; }
.aisbd-button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 20px; border-radius: 10px; border: 1px solid transparent; font-weight: 700; text-decoration: none; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.aisbd-button:hover { transform: translateY(-1px); box-shadow: 0 8px 18px rgba(17,24,39,.12); }
.aisbd-button--primary { color: #fff; background: var(--aisbd-color-primary); }
.aisbd-button--primary:hover { background: var(--aisbd-color-primary-strong); color: #fff; }
.aisbd-button--header { color: #fff; background: var(--aisbd-color-primary); min-height: 44px; }
.aisbd-hero { overflow: hidden; background: linear-gradient(120deg, #fff7ed 0%, #fef3c7 42%, #ede9fe 100%); }
.aisbd-hero__inner { min-height: 520px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .85fr); align-items: center; gap: 48px; padding-block: 56px; }
.aisbd-hero__copy { max-width: 620px; }
.aisbd-eyebrow { display: inline-block; margin-bottom: 12px; color: var(--aisbd-color-primary-strong); font-size: .78rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.aisbd-hero h1 { margin: 0 0 20px; max-width: 680px; font-size: clamp(2.8rem, 5vw, 4.6rem); line-height: .98; letter-spacing: -.04em; }
.aisbd-hero p { max-width: 610px; margin: 0; color: #4b5563; font-size: 1.15rem; line-height: 1.7; }
.aisbd-hero__actions { display: flex; align-items: center; gap: 22px; margin-top: 30px; flex-wrap: wrap; }
.aisbd-text-link { color: var(--aisbd-color-text); font-weight: 700; text-decoration: none; }
.aisbd-hero-visual { position: relative; min-height: 390px; display: grid; place-items: center; }
.aisbd-hero-visual__glow { position: absolute; width: 330px; height: 330px; border-radius: 50%; background: radial-gradient(circle, rgba(124,58,237,.28), rgba(124,58,237,0) 68%); }
.aisbd-hero-visual__panel { position: absolute; width: min(390px, 88%); height: 285px; border-radius: 26px; transform: rotate(-6deg); box-shadow: var(--aisbd-shadow-soft); }
.aisbd-hero-visual__panel--back { background: #f97316; transform: translate(28px, 28px) rotate(7deg); opacity: .9; }
.aisbd-hero-visual__panel--main { padding: 22px; background: #111827; color: #fff; transform: rotate(-5deg); }
.aisbd-hero-visual__topline { display: flex; justify-content: space-between; color: #c4b5fd; font-size: .75rem; font-weight: 700; }
.aisbd-hero-visual__screen { height: 180px; margin-top: 16px; border-radius: 18px; padding: 20px; background: linear-gradient(145deg, #312e81, #1d4ed8); display: flex; flex-direction: column; justify-content: space-between; }
.aisbd-hero-visual__chip { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 12px; background: rgba(255,255,255,.16); font-weight: 800; }
.aisbd-hero-visual__screen strong { font-size: 2rem; line-height: .95; }
.aisbd-hero-visual__dots { color: #fde68a; letter-spacing: .35em; }
.aisbd-hero-visual__progress { height: 8px; margin-top: 18px; border-radius: 99px; background: #374151; overflow: hidden; }
.aisbd-hero-visual__progress span { display: block; width: 72%; height: 100%; border-radius: inherit; background: #a78bfa; }
.aisbd-hero-visual__floating { position: absolute; z-index: 2; padding: 12px 16px; border-radius: 14px; background: rgba(255,255,255,.94); box-shadow: var(--aisbd-shadow-soft); font-size: .88rem; }
.aisbd-hero-visual__floating--one { top: 38px; right: 0; }
.aisbd-hero-visual__floating--two { bottom: 42px; left: 0; }
.aisbd-section { padding: 72px 0; }
.aisbd-section--courses { background: #fff; }
.aisbd-section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.aisbd-section-heading h2 { margin: 0 0 8px; font-size: clamp(2rem, 3vw, 2.7rem); letter-spacing: -.025em; }
.aisbd-section-heading p { margin: 0; color: var(--aisbd-color-muted); }
.aisbd-course-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.aisbd-course-card { min-width: 0; overflow: hidden; border: 1px solid var(--aisbd-color-border); border-radius: var(--aisbd-radius-md); background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
.aisbd-course-card:hover { transform: translateY(-3px); box-shadow: var(--aisbd-shadow-soft); }
.aisbd-course-card__media { display: block; aspect-ratio: 16 / 9; background: linear-gradient(135deg, #e0e7ff, #ede9fe); overflow: hidden; }
.aisbd-course-card__media img { display: block; width: 100%; height: 100%; object-fit: cover; }
.aisbd-course-card__placeholder { display: grid; place-items: center; width: 100%; height: 100%; color: #fff; background: linear-gradient(135deg, #1e3a8a, #7c3aed); font-size: 2.5rem; font-weight: 900; }
.aisbd-course-card__body { padding: 16px; }
.aisbd-course-card__title { margin: 0 0 8px; font-size: 1.03rem; line-height: 1.35; }
.aisbd-course-card__title a { color: var(--aisbd-color-text); text-decoration: none; }
.aisbd-course-card__meta { margin: 0 0 10px; color: var(--aisbd-color-muted); font-size: .85rem; line-height: 1.45; }
.aisbd-course-card__rating { display: flex; gap: 5px; align-items: center; color: #b45309; font-size: .85rem; }
.aisbd-course-card__price { margin-top: 8px; font-size: 1.05rem; font-weight: 800; }
.aisbd-empty-state { padding: 40px; border: 1px dashed #cbd5e1; border-radius: var(--aisbd-radius-md); text-align: center; background: var(--aisbd-color-surface-soft); }
.aisbd-section--content { background: var(--aisbd-color-surface-soft); }
.aisbd-site-footer { border-top: 1px solid var(--aisbd-color-border); background: #111827; color: #fff; }
.aisbd-site-footer__inner { min-height: 170px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.aisbd-site-footer p { margin: 8px 0 0; color: #cbd5e1; }
.aisbd-footer-nav { display: flex; gap: 18px; list-style: none; margin: 0; padding: 0; }
.aisbd-footer-nav a { color: #e5e7eb; text-decoration: none; }
.aisbd-site-footer__bottom { padding: 18px 0; border-top: 1px solid rgba(255,255,255,.12); color: #cbd5e1; font-size: .85rem; }


/* PHASE 03.3-A.2 — v1.2.4 Responsive Header Hotfix
 * Scope: responsive stability only. No new page/navigation fallback is introduced.
 */
.aisbd-market-header__inner > * { min-width: 0; }
.aisbd-brand { min-width: 0; }
.aisbd-brand .custom-logo-link { display: flex; align-items: center; max-width: 100%; }
.aisbd-brand .custom-logo { display: block; max-width: 100%; height: auto; max-height: 48px; width: auto; object-fit: contain; }
.aisbd-primary-nav { min-width: 0; }
.aisbd-primary-nav__list { flex-wrap: nowrap; }
.aisbd-primary-nav__list li { min-width: 0; }
.aisbd-primary-nav__list a,
.aisbd-header-actions a { display: inline-flex; align-items: center; min-height: 40px; }
.aisbd-header-search input::placeholder { color: #6b7280; opacity: 1; }
.aisbd-hero__inner,
.aisbd-hero__copy,
.aisbd-hero-visual { min-width: 0; }
.aisbd-hero__inner { isolation: isolate; }
.aisbd-hero__actions a:focus-visible,
.aisbd-market-header a:focus-visible,
.aisbd-market-header input:focus-visible,
.aisbd-mobile-menu summary:focus-visible {
    outline: 3px solid var(--aisbd-color-primary-soft);
    outline-offset: 3px;
}
.aisbd-course-card__title a:focus-visible { outline: 2px solid var(--aisbd-color-primary); outline-offset: 3px; }

.aisbd-mobile-menu { display: none; position: relative; }
.aisbd-mobile-menu summary {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--aisbd-color-border);
    border-radius: 10px;
    background: #fff;
    color: var(--aisbd-color-text);
    cursor: pointer;
    list-style: none;
    font-size: 1.15rem;
}
.aisbd-mobile-menu summary::-webkit-details-marker { display: none; }
.aisbd-mobile-menu__panel {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    z-index: 100;
    width: min(280px, calc(100vw - 2rem));
    padding: 12px;
    border: 1px solid var(--aisbd-color-border);
    border-radius: 14px;
    background: #fff;
    box-shadow: var(--aisbd-shadow-soft);
}
.aisbd-mobile-menu__list { display: grid; gap: 4px; list-style: none; margin: 0; padding: 0; }
.aisbd-mobile-menu__list li { list-style: none; margin: 0; padding: 0; }
.aisbd-mobile-menu__list a {
    display: block;
    padding: 12px 14px;
    border-radius: 9px;
    color: var(--aisbd-color-text);
    text-decoration: none;
}
.aisbd-mobile-menu__list a:hover,
.aisbd-mobile-menu__list a:focus-visible { background: var(--aisbd-color-primary-soft); color: var(--aisbd-color-primary-strong); }

@media (prefers-reduced-motion: reduce) {
    .aisbd-button,
    .aisbd-course-card { transition: none; }
    .aisbd-course-card:hover,
    .aisbd-button:hover { transform: none; }
}

/* Desktop: preserve the stable marketplace row. */
@media (min-width: 1101px) {
    .aisbd-market-header__inner { grid-template-columns: auto auto minmax(260px, 1fr) minmax(0, auto) auto; }
    .aisbd-mobile-menu { display: none !important; }
}

/* Tablet: remove the nav before the header becomes crowded. */
@media (max-width: 1100px) {
    .aisbd-market-header__inner {
        grid-template-columns: auto minmax(180px, 1fr) auto;
        gap: 14px;
    }
    .aisbd-primary-nav { display: none; }
    .aisbd-mobile-menu { display: block; }
    .aisbd-course-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* Small tablet / large phone: search gets its own full-width row. */
@media (max-width: 820px) {
    .aisbd-market-header__inner {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 10px 12px;
        padding-block: 10px;
    }
    .aisbd-brand .custom-logo { max-height: 46px; }
    .aisbd-header-actions { justify-content: flex-end; gap: 8px; }
    .aisbd-header-search {
        grid-column: 1 / -1;
        grid-row: 2;
        width: 100%;
        padding-bottom: 2px;
    }
    .aisbd-header-search input { height: 48px; }
    .aisbd-hero__inner {
        grid-template-columns: 1fr;
        min-height: auto;
        gap: 28px;
        padding-block: 46px 34px;
    }
    .aisbd-hero__copy { max-width: 760px; }
    .aisbd-hero h1 { max-width: 760px; font-size: clamp(2.5rem, 7vw, 4rem); }
    .aisbd-hero p { max-width: 680px; font-size: 1.05rem; }
    .aisbd-hero-visual { min-height: 320px; }
    .aisbd-hero-visual__panel { width: min(390px, 82vw); }
    .aisbd-hero-visual__floating--one { right: 4%; }
    .aisbd-hero-visual__floating--two { left: 4%; }
    .aisbd-course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Phone: compact actions, controlled logo, one-column content. */
@media (max-width: 560px) {
    .aisbd-container { width: min(100% - 1.25rem, 1200px); }
    .aisbd-market-header__inner { padding-block: 8px 10px; }
    .aisbd-brand .custom-logo { max-height: 40px; max-width: 150px; }
    .aisbd-header-actions .aisbd-header-link--account { display: none; }
    .aisbd-button--header { min-height: 40px; padding-inline: 14px; border-radius: 9px; font-size: .88rem; }
    .aisbd-header-icon { font-size: 1.1rem; }
    .aisbd-mobile-menu summary { width: 40px; height: 40px; }
    .aisbd-header-search input { height: 46px; padding-left: 42px; font-size: .95rem; }
    .aisbd-hero__inner { padding-block: 38px 24px; gap: 20px; }
    .aisbd-eyebrow { font-size: .7rem; letter-spacing: .065em; }
    .aisbd-hero h1 { margin-bottom: 16px; font-size: clamp(2.25rem, 11vw, 3rem); line-height: 1.02; letter-spacing: -.035em; }
    .aisbd-hero p { font-size: 1rem; line-height: 1.6; }
    .aisbd-hero__actions { align-items: stretch; flex-direction: column; gap: 12px; margin-top: 24px; }
    .aisbd-hero__actions .aisbd-button,
    .aisbd-hero__actions .aisbd-text-link { width: 100%; text-align: center; }
    .aisbd-hero-visual { min-height: 270px; margin-top: 2px; }
    .aisbd-hero-visual__glow { width: 250px; height: 250px; }
    .aisbd-hero-visual__panel { width: min(340px, 90vw); height: 245px; }
    .aisbd-hero-visual__panel--main { padding: 18px; }
    .aisbd-hero-visual__screen { height: 150px; padding: 16px; }
    .aisbd-hero-visual__screen strong { font-size: 1.65rem; }
    .aisbd-hero-visual__floating { padding: 9px 12px; font-size: .76rem; }
    .aisbd-hero-visual__floating--one { top: 18px; right: 0; }
    .aisbd-hero-visual__floating--two { bottom: 18px; left: 0; }
    .aisbd-section { padding: 52px 0; }
    .aisbd-section-heading { align-items: flex-start; flex-direction: column; }
    .aisbd-course-grid { grid-template-columns: 1fr; }
    .aisbd-site-footer__inner { align-items: flex-start; flex-direction: column; padding-block: 36px; }
    .aisbd-footer-nav { flex-wrap: wrap; }
}


/* v1.2.5 — Production header navigation cleanup.
 * Keep the header intentionally focused on the real Courses destination.
 * No fallback/test/demo primary-menu items are rendered in the marketplace header.
 */
.aisbd-header-link--courses {
    font-weight: 600;
}
@media (max-width: 1024px) {
    .aisbd-header-link--courses {
        display: inline-flex;
        align-items: center;
        min-height: 40px;
    }
}


/* v1.2.7 — Configurable global header navigation.
 * Courses remains the canonical first link. Additional pages/links can be
 * assigned by the site owner to the dedicated Header Menu location.
 */
.aisbd-header-nav {
    min-width: 0;
}
.aisbd-header-nav__list,
.aisbd-mobile-header-nav__list {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}
.aisbd-header-nav__list li,
.aisbd-mobile-header-nav__list li { margin: 0; padding: 0; list-style: none; }
.aisbd-header-nav__list a,
.aisbd-mobile-header-nav__list a {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 8px 10px;
    border-radius: 9px;
    color: var(--aisbd-color-text);
    text-decoration: none;
    white-space: nowrap;
}
.aisbd-header-nav__list a:hover,
.aisbd-header-nav__list a:focus-visible,
.aisbd-mobile-header-nav__list a:hover,
.aisbd-mobile-header-nav__list a:focus-visible {
    background: var(--aisbd-color-primary-soft);
    color: var(--aisbd-color-primary-strong);
}
.aisbd-mobile-header-nav { display: none; }
@media (max-width: 1100px) {
    .aisbd-header-nav { display: none; }
    .aisbd-mobile-header-nav { display: block; }
    .aisbd-mobile-header-nav__list { display: grid; gap: 4px; }
}
@media (max-width: 820px) {
    .aisbd-mobile-header-nav { grid-column: 1 / -1; grid-row: 3; }
}
@media (max-width: 560px) {
    .aisbd-mobile-header-nav__list a { width: 100%; padding: 11px 12px; }
}


/* v1.3.3 — Mobile login visibility hotfix.
 * Keep Log in visible on phone widths without changing the header architecture.
 */
@media (max-width: 560px) {
    .aisbd-header-actions {
        gap: 5px;
        min-width: 0;
    }
    .aisbd-header-actions .aisbd-header-link--account {
        display: inline-flex;
        min-height: 40px;
        padding-inline: 4px;
        font-size: .86rem;
    }
    .aisbd-button--header {
        min-height: 40px;
        padding-inline: 10px;
        font-size: .86rem;
    }
    .aisbd-header-icon {
        flex: 0 0 auto;
    }
    .aisbd-mobile-menu {
        flex: 0 0 auto;
    }
}