/**
 * ParentingHealthTips — main stylesheet.
 *
 * Structure:
 *   1. Design tokens (custom properties)
 *   2. Base & typography
 *   3. Accessibility helpers
 *   4. Layout (container, grids)
 *   5. Components (buttons, cards, forms, badges, tables, etc.)
 *   6. Header & footer
 *   7. Home sections
 *   8. Dashboard
 *   9. AI assistant
 *  10. Utilities & animations
 *  11. Responsive
 *
 * All colours run through tokens so the palette can be retheme-d in one place.
 */

/* ============================================================
 * 1. Design tokens
 * ========================================================== */
:root {
	/* Brand palette */
	--c-primary: #2563eb;
	--c-primary-dark: #1d4ed8;
	--c-primary-light: #dbeafe;
	--c-accent: #10b981;
	--c-danger: #dc2626;
	--c-warning: #d97706;

	/* Neutrals */
	--c-bg: #ffffff;
	--c-bg-alt: #f8fafc;
	--c-surface: #ffffff;
	--c-border: #e2e8f0;
	--c-text: #0f172a;
	--c-text-muted: #64748b;
	--c-text-invert: #ffffff;

	/* Typography */
	--font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	--fs-xs: 0.75rem;
	--fs-sm: 0.875rem;
	--fs-base: 1rem;
	--fs-lg: 1.125rem;
	--fs-xl: 1.375rem;
	--fs-2xl: 1.75rem;
	--fs-3xl: 2.25rem;
	--fs-4xl: 3rem;
	--lh-tight: 1.2;
	--lh-base: 1.6;

	/* Spacing scale */
	--sp-1: 0.25rem;
	--sp-2: 0.5rem;
	--sp-3: 0.75rem;
	--sp-4: 1rem;
	--sp-5: 1.5rem;
	--sp-6: 2rem;
	--sp-7: 3rem;
	--sp-8: 4rem;
	--sp-9: 6rem;

	/* Radius, shadow, motion */
	--radius-sm: 6px;
	--radius: 12px;
	--radius-lg: 20px;
	--radius-full: 999px;
	--shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
	--shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
	--shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
	--ease: cubic-bezier(0.4, 0, 0.2, 1);
	--dur: 0.2s;

	--container: 1200px;
	--container-narrow: 760px;
	--header-h: 72px;
}

/* ============================================================
 * 2. Base & typography
 * ========================================================== */
body {
	background: var(--c-bg);
	color: var(--c-text);
	font-family: var(--font-sans);
	font-size: var(--fs-base);
	line-height: var(--lh-base);
	-webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
	line-height: var(--lh-tight);
	margin: 0 0 var(--sp-4);
	font-weight: 700;
	letter-spacing: -0.01em;
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
p { margin: 0 0 var(--sp-4); }
a { color: var(--c-primary); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--c-primary-dark); }
img { display: block; }
ul, ol { margin: 0 0 var(--sp-4); }

:focus-visible {
	outline: 3px solid var(--c-primary);
	outline-offset: 2px;
	border-radius: var(--radius-sm);
}

/* Brand the text-selection highlight instead of the harsh default blue.
   Green matches the primary CTA; overridable via --c-select-* tokens. */
::selection {
	background: var(--c-select-bg, #4caf50);
	color: var(--c-select-fg, #fff);
}
::-moz-selection {
	background: var(--c-select-bg, #4caf50);
	color: var(--c-select-fg, #fff);
}

/* ============================================================
 * 3. Accessibility helpers
 * ========================================================== */
.screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	padding: 0; margin: -1px;
	overflow: hidden; clip: rect(0, 0, 0, 0);
	white-space: nowrap; border: 0;
}
.skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	z-index: 1000;
	background: var(--c-text);
	color: var(--c-text-invert);
	padding: var(--sp-3) var(--sp-4);
	border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus {
	left: 0;
	color: var(--c-text-invert);
}

/* ============================================================
 * 4. Layout
 * ========================================================== */
.container {
	width: 100%;
	max-width: var(--container);
	margin-inline: auto;
	padding-inline: var(--sp-5);
}
.container--narrow { max-width: var(--container-narrow); }
.site-main { padding-block: var(--sp-7); }
.section { padding-block: var(--sp-8); }
.section:nth-of-type(even) { background: var(--c-bg-alt); }

.posts-grid,
.course-grid {
	display: grid;
	gap: var(--sp-5);
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

.section-heading { margin-bottom: var(--sp-6); }
.section-heading--center { text-align: center; max-width: 640px; margin-inline: auto; }
.section-heading__eyebrow {
	color: var(--c-primary);
	font-weight: 600;
	font-size: var(--fs-sm);
	text-transform: uppercase;
	letter-spacing: 0.06em;
	margin-bottom: var(--sp-2);
}
.section-heading__title { margin-bottom: var(--sp-3); }
.section-heading__desc { color: var(--c-text-muted); margin: 0; }
.section__cta { text-align: center; margin-top: var(--sp-6); }

/* ============================================================
 * 5. Components
 * ========================================================== */

/* Buttons */
.btn {
	--btn-bg: var(--c-primary);
	--btn-fg: var(--c-text-invert);
	display: inline-flex;
	align-items: center;
	gap: var(--sp-2);
	font-weight: 600;
	font-size: var(--fs-sm);
	line-height: 1;
	padding: 0.75em 1.25em;
	border: 1px solid transparent;
	border-radius: var(--radius-full);
	background: var(--btn-bg);
	color: var(--btn-fg);
	cursor: pointer;
	transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
	white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); color: var(--btn-fg); }
.btn:active { transform: translateY(0); }
.btn .pht-icon { width: 1.1em; height: 1.1em; }
.btn--primary { --btn-bg: var(--c-primary); }
.btn--primary:hover { background: var(--c-primary-dark); }
.btn--secondary {
	--btn-bg: transparent;
	--btn-fg: var(--c-primary);
	border-color: var(--c-border);
	background: var(--c-surface);
}
.btn--secondary:hover { background: var(--c-primary-light); border-color: var(--c-primary-light); }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--c-text); }
.btn--danger { --btn-bg: var(--c-danger); }
.btn--sm { font-size: var(--fs-xs); padding: 0.6em 1em; }
.btn--lg { font-size: var(--fs-base); padding: 0.85em 1.6em; }

/* Cards (shared surface) */
.course-card,
.post-card,
.pricing-card,
.testimonial-card,
.stat-widget,
.category-card,
.instructor-card,
.certificate-card {
	background: var(--c-surface);
	border: 1px solid var(--c-border);
	border-radius: var(--radius);
	box-shadow: var(--shadow-sm);
	transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

/* Course card */
.course-card { display: flex; flex-direction: column; overflow: hidden; }
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.course-card__media {
	position: relative;
	aspect-ratio: 16 / 9;
	background: var(--c-bg-alt);
	display: block;
	overflow: hidden;
}
.course-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s var(--ease); }
.course-card:hover .course-card__media img { transform: scale(1.05); }
.course-card__placeholder {
	display: grid;
	place-items: center;
	height: 100%;
	color: var(--c-text-muted);
}
.course-card__placeholder .pht-icon { width: 48px; height: 48px; }
.course-card__level {
	position: absolute;
	top: var(--sp-3);
	left: var(--sp-3);
	background: rgba(15, 23, 42, 0.75);
	color: #fff;
	font-size: var(--fs-xs);
	padding: 0.3em 0.7em;
	border-radius: var(--radius-full);
}
.course-card__body { padding: var(--sp-4); flex: 1; display: flex; flex-direction: column; gap: var(--sp-2); }
.course-card__title { font-size: var(--fs-lg); margin: 0; }
.course-card__author { color: var(--c-text-muted); font-size: var(--fs-sm); margin: 0; }
.course-card__excerpt { color: var(--c-text-muted); font-size: var(--fs-sm); margin: 0; }
.course-card__meta { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-top: auto; padding-top: var(--sp-2); color: var(--c-text-muted); font-size: var(--fs-xs); }
.course-card__meta-item { display: inline-flex; align-items: center; gap: 0.3em; }
.course-card__meta-item .pht-icon { width: 1em; height: 1em; }
.course-card__progress { margin-top: var(--sp-2); }
.course-card__footer {
	display: flex; align-items: center; justify-content: space-between;
	padding: var(--sp-4);
	border-top: 1px solid var(--c-border);
}
.course-card__price { font-weight: 700; color: var(--c-text); }

/* Post card */
.post-card { display: flex; flex-direction: column; overflow: hidden; }
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.post-card__media img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.post-card__body { padding: var(--sp-4); display: flex; flex-direction: column; gap: var(--sp-2); }
.post-card__title { font-size: var(--fs-lg); margin: 0; }
.entry-meta { color: var(--c-text-muted); font-size: var(--fs-sm); }
.post-card__more { display: inline-flex; align-items: center; gap: 0.3em; font-weight: 600; font-size: var(--fs-sm); margin-top: auto; }
.post-card__more .pht-icon { width: 1em; height: 1em; }

/* Stars */
.stars { display: inline-flex; gap: 1px; color: var(--c-warning); }
.star .pht-icon { width: 1em; height: 1em; }
.star { color: var(--c-border); }
.star.is-filled { color: var(--c-warning); }
.stars-count { color: var(--c-text-muted); font-size: var(--fs-xs); }

/* Progress bar */
.progress {
	position: relative;
	height: 8px;
	background: var(--c-bg-alt);
	border-radius: var(--radius-full);
	overflow: hidden;
}
.progress__bar {
	position: absolute;
	inset: 0 auto 0 0;
	background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
	border-radius: inherit;
	transition: width 0.6s var(--ease);
}
.progress__label { position: absolute; right: var(--sp-2); top: -1.4em; font-size: var(--fs-xs); color: var(--c-text-muted); }

/* Badges */
.badge {
	display: inline-block;
	font-size: var(--fs-xs);
	font-weight: 600;
	padding: 0.25em 0.7em;
	border-radius: var(--radius-full);
	background: var(--c-bg-alt);
	color: var(--c-text-muted);
	text-transform: capitalize;
}
.badge--success { background: #dcfce7; color: #166534; }
.badge--danger { background: #fee2e2; color: #991b1b; }

/* Forms */
.form { max-width: 560px; }
.form__row { margin-bottom: var(--sp-4); }
.form__label { display: block; font-weight: 600; font-size: var(--fs-sm); margin-bottom: var(--sp-2); }
.form__input, .search-form__field, .header-search__form input, .newsletter__input, .ai-assistant__input {
	width: 100%;
	padding: 0.7em 0.9em;
	border: 1px solid var(--c-border);
	border-radius: var(--radius-sm);
	font: inherit;
	background: var(--c-surface);
	color: var(--c-text);
	transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.form__input:focus, .newsletter__input:focus {
	border-color: var(--c-primary);
	box-shadow: 0 0 0 3px var(--c-primary-light);
	outline: none;
}
.form__fieldset { border: 1px solid var(--c-border); border-radius: var(--radius); padding: var(--sp-4); margin-bottom: var(--sp-4); }
.form__legend { font-weight: 600; padding-inline: var(--sp-2); }
.form__hint { color: var(--c-text-muted); font-size: var(--fs-sm); }
.form__actions { display: flex; align-items: center; gap: var(--sp-4); }
.form__message, .newsletter__message { margin: 0; font-size: var(--fs-sm); }
.form__message.is-success, .newsletter__message.is-success { color: var(--c-accent); }
.form__message.is-error, .newsletter__message.is-error { color: var(--c-danger); }

/* Notices */
.notice { padding: var(--sp-3) var(--sp-4); border-radius: var(--radius-sm); margin-bottom: var(--sp-5); }
.notice--success { background: #dcfce7; color: #166534; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius); }
.data-table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.data-table th, .data-table td { padding: var(--sp-3) var(--sp-4); text-align: left; border-bottom: 1px solid var(--c-border); }
.data-table thead th { background: var(--c-bg-alt); font-weight: 600; }
.data-table tbody tr:last-child td { border-bottom: 0; }

/* Pagination */
.pagination ul { display: flex; flex-wrap: wrap; gap: var(--sp-2); list-style: none; padding: 0; justify-content: center; margin-top: var(--sp-6); }
.pagination a, .pagination span {
	display: grid; place-items: center;
	min-width: 40px; height: 40px; padding-inline: var(--sp-2);
	border: 1px solid var(--c-border); border-radius: var(--radius-sm);
	background: var(--c-surface);
}
.pagination .current { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* ============================================================
 * 6. Header & footer
 * ========================================================== */
.site-header {
	position: sticky; top: 0; z-index: 100;
	background: rgba(255, 255, 255, 0.9);
	backdrop-filter: saturate(180%) blur(10px);
	border-bottom: 1px solid var(--c-border);
}
.site-header__inner {
	display: flex; align-items: center; gap: var(--sp-5);
	min-height: var(--header-h);
}
.site-title { font-weight: 800; font-size: var(--fs-xl); color: var(--c-text); }
.custom-logo { max-height: 44px; width: auto; }
.main-navigation { margin-left: auto; }
.primary-menu, .footer-menu { display: flex; gap: var(--sp-5); list-style: none; margin: 0; padding: 0; align-items: center; }
.primary-menu a { color: var(--c-text); font-weight: 500; }
.primary-menu a:hover, .primary-menu .current-menu-item > a { color: var(--c-primary); }
.site-header__actions { display: flex; align-items: center; gap: var(--sp-3); }
.menu-toggle { display: none; }

/* Header search */
.header-search { position: relative; }
.header-search__toggle, .header-account__trigger {
	display: inline-grid; place-items: center;
	width: 40px; height: 40px;
	border: 1px solid var(--c-border); border-radius: var(--radius-full);
	background: var(--c-surface); cursor: pointer; color: var(--c-text);
}
.header-search__form {
	position: absolute; right: 0; top: calc(100% + 8px);
	display: flex; gap: var(--sp-2);
	background: var(--c-surface); padding: var(--sp-3);
	border: 1px solid var(--c-border); border-radius: var(--radius);
	box-shadow: var(--shadow); width: 320px; max-width: 80vw;
}

/* Header account */
.header-account { position: relative; display: flex; align-items: center; gap: var(--sp-3); }
.header-account__trigger { width: auto; gap: var(--sp-2); padding-inline: var(--sp-2); }
.header-account__avatar { border-radius: var(--radius-full); }
.header-account__name { font-size: var(--fs-sm); font-weight: 600; }
.header-account__menu {
	position: absolute; right: 0; top: calc(100% + 8px);
	min-width: 200px; list-style: none; margin: 0; padding: var(--sp-2);
	background: var(--c-surface); border: 1px solid var(--c-border);
	border-radius: var(--radius); box-shadow: var(--shadow); display: none;
}
.header-account__menu.is-open { display: block; }
.header-account__menu a { display: block; padding: var(--sp-2) var(--sp-3); border-radius: var(--radius-sm); color: var(--c-text); font-size: var(--fs-sm); }
.header-account__menu a:hover { background: var(--c-bg-alt); }
.header-account__login { font-weight: 600; font-size: var(--fs-sm); color: var(--c-text); }

/* Footer */
.site-footer { background: var(--c-text); color: #cbd5e1; padding-block: var(--sp-8) var(--sp-5); margin-top: var(--sp-9); }
.site-footer__widgets { display: grid; gap: var(--sp-6); grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); margin-bottom: var(--sp-6); }
.site-footer .widget-title { color: #fff; font-size: var(--fs-base); margin-bottom: var(--sp-3); }
.site-footer a { color: #cbd5e1; }
.site-footer a:hover { color: #fff; }
.site-footer__bottom { display: flex; flex-wrap: wrap; gap: var(--sp-4); justify-content: space-between; align-items: center; border-top: 1px solid rgba(255,255,255,0.1); padding-top: var(--sp-5); }
.footer-menu { flex-wrap: wrap; }
.site-footer__copy { margin: 0; font-size: var(--fs-sm); }

/* ============================================================
 * 7. Home sections
 * ========================================================== */
.hero { padding-block: var(--sp-9); background: linear-gradient(180deg, var(--c-primary-light), var(--c-bg)); }
.hero__inner { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: var(--sp-7); align-items: center; }
.hero__eyebrow { color: var(--c-primary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; font-size: var(--fs-sm); }
.hero__title { font-size: var(--fs-4xl); }
.hero__subtitle { font-size: var(--fs-lg); color: var(--c-text-muted); max-width: 46ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-bottom: var(--sp-6); }
.hero__stats { display: flex; gap: var(--sp-6); list-style: none; padding: 0; margin: 0; }
.hero__stat { display: flex; flex-direction: column; }
.hero__stat-num { font-size: var(--fs-2xl); font-weight: 800; color: var(--c-text); }
.hero__stat-label { color: var(--c-text-muted); font-size: var(--fs-sm); }
.hero__media { display: grid; place-items: center; }
.hero__card {
	display: grid; place-items: center; gap: var(--sp-3);
	aspect-ratio: 4 / 3; width: 100%;
	background: var(--c-surface); border-radius: var(--radius-lg);
	box-shadow: var(--shadow-lg); color: var(--c-primary);
}
.hero__card-icon { width: 64px; height: 64px; }
.hero__card-title { font-weight: 700; color: var(--c-text); }

.category-grid { display: grid; gap: var(--sp-4); grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); list-style: none; padding: 0; }
.category-card a { display: flex; flex-direction: column; gap: var(--sp-2); padding: var(--sp-5); align-items: flex-start; color: var(--c-text); height: 100%; }
.category-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.category-card__icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: var(--radius-sm); background: var(--c-primary-light); color: var(--c-primary); }
.category-card__name { font-weight: 700; }
.category-card__count { color: var(--c-text-muted); font-size: var(--fs-sm); }

.instructor-grid { display: grid; gap: var(--sp-5); grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); list-style: none; padding: 0; }
.instructor-card { padding: var(--sp-5); text-align: center; }
.instructor-card__avatar { border-radius: var(--radius-full); margin: 0 auto var(--sp-3); }
.instructor-card__name { font-size: var(--fs-lg); margin-bottom: var(--sp-2); }
.instructor-card__bio { color: var(--c-text-muted); font-size: var(--fs-sm); margin: 0; }

.testimonial-grid { display: grid; gap: var(--sp-5); grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.testimonial-card { padding: var(--sp-5); display: flex; flex-direction: column; gap: var(--sp-4); }
.testimonial-card__quote { margin: 0; font-size: var(--fs-lg); }
.testimonial-card__author { display: flex; align-items: center; gap: var(--sp-3); margin-top: auto; }
.testimonial-card__avatar { border-radius: var(--radius-full); }
.testimonial-card__meta { display: flex; flex-direction: column; }
.testimonial-card__name { font-weight: 700; }
.testimonial-card__role { color: var(--c-text-muted); font-size: var(--fs-sm); }

.faq-list { display: flex; flex-direction: column; gap: var(--sp-3); }
.faq-item { border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); overflow: hidden; }
.faq-item__question { display: flex; justify-content: space-between; align-items: center; gap: var(--sp-3); padding: var(--sp-4); font-weight: 600; cursor: pointer; list-style: none; }
.faq-item__question::-webkit-details-marker { display: none; }
.faq-item__icon { position: relative; width: 16px; height: 16px; flex-shrink: 0; }
.faq-item__icon::before, .faq-item__icon::after { content: ""; position: absolute; background: var(--c-primary); transition: transform var(--dur) var(--ease); }
.faq-item__icon::before { top: 7px; left: 0; width: 16px; height: 2px; }
.faq-item__icon::after { top: 0; left: 7px; width: 2px; height: 16px; }
.faq-item[open] .faq-item__icon::after { transform: rotate(90deg) scaleX(0); }
.faq-item__answer { padding: 0 var(--sp-4) var(--sp-4); color: var(--c-text-muted); }

.newsletter { display: flex; flex-wrap: wrap; gap: var(--sp-5); align-items: center; justify-content: space-between; background: var(--c-primary); color: #fff; padding: var(--sp-6); border-radius: var(--radius-lg); }
.newsletter__title { color: #fff; margin-bottom: var(--sp-2); }
.newsletter__subtitle { color: rgba(255,255,255,0.85); margin: 0; }
.newsletter__form { display: flex; flex-wrap: wrap; gap: var(--sp-2); flex: 1; min-width: 280px; }
.newsletter__input { flex: 1; }
.newsletter__message { flex-basis: 100%; color: #fff; }

/* Pricing */
.page-header--center { text-align: center; }
.page-subtitle { color: var(--c-text-muted); font-size: var(--fs-lg); }
.pricing-grid { display: grid; gap: var(--sp-5); grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); align-items: start; }
.pricing-card { padding: var(--sp-6); text-align: center; position: relative; display: flex; flex-direction: column; gap: var(--sp-4); }
.pricing-card--featured { border-color: var(--c-primary); box-shadow: var(--shadow-lg); transform: translateY(-8px); }
.pricing-card__badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--c-primary); color: #fff; font-size: var(--fs-xs); font-weight: 600; padding: 0.3em 0.9em; border-radius: var(--radius-full); }
.pricing-card__name { margin: 0; }
.pricing-card__amount { font-size: var(--fs-4xl); font-weight: 800; }
.pricing-card__period { color: var(--c-text-muted); }
.pricing-card__features { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--sp-2); text-align: left; }
.pricing-card__features li { display: flex; align-items: center; gap: var(--sp-2); }
.pricing-card__features .pht-icon { width: 1.1em; height: 1.1em; color: var(--c-accent); flex-shrink: 0; }
.pricing-card .btn { margin-top: auto; justify-content: center; }

/* Course filters */
.course-filters { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-bottom: var(--sp-6); }
.course-filters__item { padding: 0.4em 1em; border: 1px solid var(--c-border); border-radius: var(--radius-full); color: var(--c-text); font-size: var(--fs-sm); }
.course-filters__item.is-active, .course-filters__item:hover { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }

/* Contact */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-7); align-items: start; }

/* 404 */
.error-404 { text-align: center; }
.error-404__code { font-size: 6rem; font-weight: 800; color: var(--c-primary-light); line-height: 1; margin: 0; }
.error-404__actions { display: flex; gap: var(--sp-3); justify-content: center; flex-wrap: wrap; margin-top: var(--sp-5); }
.error-404__search { max-width: 420px; margin: var(--sp-5) auto; }

/* ============================================================
 * 8. Dashboard
 * ========================================================== */
.dashboard__layout { display: grid; grid-template-columns: 260px 1fr; gap: var(--sp-6); align-items: start; }
.dashboard__sidebar { position: sticky; top: calc(var(--header-h) + var(--sp-4)); background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: var(--sp-4); }
.dashboard__user { display: flex; align-items: center; gap: var(--sp-3); padding-bottom: var(--sp-4); border-bottom: 1px solid var(--c-border); margin-bottom: var(--sp-3); }
.dashboard__avatar { border-radius: var(--radius-full); }
.dashboard__user-meta { display: flex; flex-direction: column; }
.dashboard__user-name { font-weight: 700; }
.dashboard__user-role { color: var(--c-text-muted); font-size: var(--fs-sm); }
.dashboard__nav ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 2px; }
.dashboard__nav-link { display: flex; align-items: center; gap: var(--sp-3); padding: var(--sp-3); border-radius: var(--radius-sm); color: var(--c-text); font-weight: 500; font-size: var(--fs-sm); }
.dashboard__nav-link .pht-icon { width: 1.2em; height: 1.2em; color: var(--c-text-muted); }
.dashboard__nav-link:hover { background: var(--c-bg-alt); }
.dashboard__nav-link.is-active { background: var(--c-primary-light); color: var(--c-primary-dark); }
.dashboard__nav-link.is-active .pht-icon { color: var(--c-primary); }
.dashboard__section-head { margin-bottom: var(--sp-5); }
.dashboard__title { margin-bottom: var(--sp-2); }
.dashboard__subtitle { color: var(--c-text-muted); margin: 0; }
.dashboard__block { margin-top: var(--sp-6); }
.dashboard__block-title { font-size: var(--fs-lg); margin-bottom: var(--sp-4); }
.dashboard__empty { text-align: center; padding: var(--sp-7); border: 2px dashed var(--c-border); border-radius: var(--radius); color: var(--c-text-muted); }
.dashboard__empty p { margin-bottom: var(--sp-4); }

.stat-grid { display: grid; gap: var(--sp-4); grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.stat-widget { padding: var(--sp-5); display: flex; flex-direction: column; gap: var(--sp-2); }
.stat-widget__icon { display: grid; place-items: center; width: 40px; height: 40px; border-radius: var(--radius-sm); background: var(--c-primary-light); color: var(--c-primary); }
.stat-widget__value { font-size: var(--fs-2xl); font-weight: 800; }
.stat-widget__label { color: var(--c-text-muted); font-size: var(--fs-sm); }

.certificate-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--sp-3); }
.certificate-card { display: flex; align-items: center; gap: var(--sp-4); padding: var(--sp-4); }
.certificate-card__icon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: var(--radius-sm); background: var(--c-primary-light); color: var(--c-primary); flex-shrink: 0; }
.certificate-card__body { flex: 1; }
.certificate-card__title { font-size: var(--fs-base); margin: 0; }
.certificate-card__meta { color: var(--c-text-muted); font-size: var(--fs-sm); margin: 0; }

/* ============================================================
 * 9. AI assistant
 * ========================================================== */
.ai-assistant { position: fixed; right: var(--sp-5); bottom: var(--sp-5); z-index: 200; }
.ai-assistant__launcher {
	display: inline-flex; align-items: center; gap: var(--sp-2);
	padding: 0.75em 1.1em; border: none; border-radius: var(--radius-full);
	background: var(--c-primary); color: #fff; cursor: pointer;
	box-shadow: var(--shadow-lg); font-weight: 600;
	transition: transform var(--dur) var(--ease);
}
.ai-assistant__launcher:hover { transform: translateY(-2px); }
.ai-assistant__launcher .pht-icon { width: 1.3em; height: 1.3em; }
/* A class-level `display` outranks the UA's [hidden] rule, so components that
   set a display value must opt back out explicitly when hidden. */
[hidden] { display: none !important; }
.ai-assistant__panel {
	position: absolute; right: 0; bottom: calc(100% + 12px);
	width: 360px; max-width: 90vw; height: 480px; max-height: 70vh;
	display: flex; flex-direction: column;
	background: var(--c-surface); border: 1px solid var(--c-border);
	border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden;
}
.ai-assistant__header { display: flex; align-items: center; justify-content: space-between; padding: var(--sp-4); border-bottom: 1px solid var(--c-border); }
.ai-assistant__title { font-size: var(--fs-base); margin: 0; }
.ai-assistant__close { background: none; border: none; cursor: pointer; color: var(--c-text-muted); display: grid; place-items: center; width: 32px; height: 32px; border-radius: var(--radius-sm); }
.ai-assistant__close:hover { background: var(--c-bg-alt); }
.ai-assistant__log { flex: 1; overflow-y: auto; padding: var(--sp-4); display: flex; flex-direction: column; gap: var(--sp-3); }
.ai-assistant__msg { max-width: 85%; padding: var(--sp-3); border-radius: var(--radius); font-size: var(--fs-sm); line-height: 1.5; }
.ai-assistant__msg--bot { background: var(--c-bg-alt); align-self: flex-start; }
.ai-assistant__msg--user { background: var(--c-primary); color: #fff; align-self: flex-end; }
.ai-assistant__msg--typing { color: var(--c-text-muted); font-style: italic; }
.ai-assistant__form { display: flex; gap: var(--sp-2); padding: var(--sp-3); border-top: 1px solid var(--c-border); align-items: flex-end; }
.ai-assistant__input { resize: none; max-height: 120px; }

/* ============================================================
 * 10. Utilities & animations
 * ========================================================== */
.link { color: var(--c-primary); font-weight: 600; }
[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity 0.5s var(--ease), transform 0.5s var(--ease); }
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
	*, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
	[data-reveal] { opacity: 1; transform: none; }
}

/* ============================================================
 * 11. Responsive
 * ========================================================== */
@media (max-width: 1024px) {
	.hero__inner { grid-template-columns: 1fr; }
	.hero__media { order: -1; max-width: 420px; }
	.dashboard__layout { grid-template-columns: 1fr; }
	.dashboard__sidebar { position: static; }
	.contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 782px) {
	:root { --fs-3xl: 1.9rem; --fs-4xl: 2.3rem; }
	.menu-toggle {
		display: inline-grid; place-items: center;
		width: 44px; height: 44px; order: 3;
		border: 1px solid var(--c-border); border-radius: var(--radius-sm);
		background: var(--c-surface); cursor: pointer;
	}
	.menu-toggle__bar, .menu-toggle__bar::before, .menu-toggle__bar::after {
		content: ""; display: block; width: 20px; height: 2px; background: var(--c-text); position: relative;
	}
	.menu-toggle__bar::before { position: absolute; top: -6px; }
	.menu-toggle__bar::after { position: absolute; top: 6px; }
	.main-navigation { margin-left: 0; }
	.primary-menu {
		position: absolute; left: 0; right: 0; top: 100%;
		flex-direction: column; align-items: stretch; gap: 0;
		background: var(--c-surface); border-bottom: 1px solid var(--c-border);
		padding: var(--sp-3); box-shadow: var(--shadow);
		display: none;
	}
	.primary-menu.is-open { display: flex; }
	.primary-menu a { padding: var(--sp-3); display: block; }
	.site-header__inner { flex-wrap: wrap; }
	.site-header__actions { margin-left: auto; }
	.header-account__name { display: none; }
	.hero__stats { flex-wrap: wrap; gap: var(--sp-4); }
	.newsletter { flex-direction: column; align-items: stretch; text-align: left; }
	.pricing-card--featured { transform: none; }
	.site-footer__bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
	.container { padding-inline: var(--sp-4); }
	.ai-assistant__launcher-label { display: none; }
}

/* --------------------------------------------------------------------------
 * Front-end course editor
 * -------------------------------------------------------------------------- */
.form--course-editor .form__row,
.form--lesson-editor .form__row { margin-bottom: var(--sp-4); }

.form__grid { display: grid; gap: var(--sp-4); }
.form__grid--2 { grid-template-columns: repeat(2, 1fr); }
.form__grid--3 { grid-template-columns: repeat(3, 1fr); }

.form__row--check { display: flex; align-items: center; }
.form__row--check label { display: flex; align-items: center; gap: .5em; margin: 0; }

.form__checks { display: flex; flex-wrap: wrap; gap: .4em 1.2em; }
.form__check-inline { display: inline-flex; align-items: center; gap: .4em; }

.form__actions { margin-top: var(--sp-5); }

.ce-thumb { display: flex; align-items: center; gap: var(--sp-3); flex-wrap: wrap; }
.ce-thumb__preview { max-width: 180px; height: auto; border-radius: 8px; border: 1px solid #e2e8ef; }

.ce-curriculum { margin-top: var(--sp-6); }
.ce-curriculum__list { list-style: none; margin: 0; padding: 0; }
.ce-curriculum__item {
	display: flex; align-items: center; gap: var(--sp-3);
	padding: .7em 1em; border: 1px solid #e2e8ef; border-radius: 8px; margin-bottom: .5em;
}
.ce-curriculum__title { flex: 1; }
.ce-curriculum__item--quiz { margin-left: var(--sp-5); border-style: dashed; }
.ce-curriculum__subhead { margin: var(--sp-5) 0 .3em; font-size: 1rem; }
.badge--muted { opacity: .7; }

.form--danger { margin-top: var(--sp-5); }

@media (max-width: 640px) {
	.form__grid--2,
	.form__grid--3 { grid-template-columns: 1fr; }
}