/* =========================================================================
   Freeable App — design system + landing styles
   Palette: black (primary) + blue (secondary) + white.
   ========================================================================= */

:root {
	--ink: #0a0a0b;
	--ink-soft: #2c2c33;
	--muted: #6a6a73;
	--bg: #ffffff;
	--soft: #f4f6f9;
	--line: #e5e8ef;

	/* black primary + blue secondary + white. --blue = strong accent (buttons/badges,
	   white text); the --yellow* names are repurposed as the LIGHT blue tints
	   (chips / highlighter / soft section backgrounds, with dark text). */
	--blue: #2563eb;
	--blue-strong: #1d4ed8;
	--blue-deep: #1e40af;
	--yellow: #d4e6fc;
	--yellow-strong: #bcd9f9;
	--yellow-soft: #eaf3fe;
	--yellow-line: #c4ddf9;

	--radius: 16px;
	--radius-sm: 10px;
	--container: 1140px;
	--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05), 0 1px 3px rgba(0, 0, 0, .07);
	--shadow-lg: 0 22px 50px -22px rgba(0, 0, 0, .4);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
	margin: 0;
	font-family: "Inter", system-ui, -apple-system, "Segoe UI", "Noto Sans Thai", sans-serif;
	color: var(--ink);
	background: var(--bg);
	line-height: 1.65;
	-webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.18; margin: 0 0 .5em; font-weight: 800; letter-spacing: -.02em; }
p { margin: 0 0 1em; }
a { color: var(--ink); text-decoration: none; }
a:hover { color: #000; }
img { max-width: 100%; height: auto; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: 22px; }
.muted { color: var(--muted); }

/* ------- Buttons ------- */
.btn {
	display: inline-flex; align-items: center; justify-content: center; gap: .5em;
	padding: .72em 1.3em; border-radius: var(--radius-sm);
	background: var(--ink); color: #fff; font-weight: 600; font-size: .98rem;
	border: 1px solid transparent; cursor: pointer;
	transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
	box-shadow: var(--shadow-sm);
}
.btn:hover { background: #000; color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn--lg { padding: .92em 1.7em; font-size: 1.05rem; }
.btn--sm { padding: .55em 1.05em; font-size: .9rem; }
.btn--accent { background: var(--blue); color: #fff; }
.btn--accent:hover { background: var(--blue-strong); color: #fff; }
.btn--ghost { background: #fff; color: var(--ink); border-color: var(--line); box-shadow: none; }
.btn--ghost:hover { background: var(--soft); color: #000; border-color: #ccd2dc; }

/* ------- Header ------- */
.site-header {
	position: sticky; top: 0; z-index: 50;
	background: rgba(255, 255, 255, .85); backdrop-filter: saturate(180%) blur(12px);
	border-bottom: 1px solid transparent; transition: border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-scrolled { border-color: var(--line); box-shadow: 0 6px 24px -18px rgba(0, 0, 0, .4); }
.site-header__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }

.brand { display: inline-flex; align-items: center; font-weight: 800; font-size: 1.4rem; letter-spacing: -.03em; color: var(--ink); }
.brand__dot { width: 9px; height: 9px; border-radius: 50%; background: var(--blue); margin-left: 3px; }
.brand--footer { font-size: 1.3rem; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav > a { color: var(--ink-soft); font-weight: 500; font-size: .98rem; }
.nav > a:hover { color: #000; }
.nav > a.btn { color: #fff; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; align-items: center; justify-content: center; background: none; border: 1px solid var(--line); border-radius: 10px; }
.nav-toggle span { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ------- Hero ------- */
.hero {
	position: relative; overflow: hidden;
	background:
		radial-gradient(900px 460px at 82% -12%, var(--yellow-soft), transparent 62%),
		radial-gradient(640px 360px at 2% 4%, var(--yellow-soft), transparent 58%),
		var(--bg);
	padding: clamp(66px, 11vw, 132px) 0 clamp(56px, 8vw, 96px);
}
.hero__inner { max-width: 840px; }
.eyebrow { display: inline-block; font-weight: 600; font-size: .82rem; letter-spacing: .04em; text-transform: uppercase; color: #fff; background: var(--blue); padding: .42em .95em; border-radius: 999px; margin-bottom: 20px; }
.hero__title { font-size: clamp(2.1rem, 5.6vw, 3.7rem); margin-bottom: .35em; }
.mark { background: linear-gradient(180deg, transparent 56%, var(--yellow) 56%); padding: 0 .06em; }
.lead { font-size: clamp(1.05rem, 2vw, 1.28rem); color: var(--ink-soft); max-width: 650px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }

/* ------- Sections ------- */
.section { padding: clamp(58px, 9vw, 104px) 0; }
.section--soft { background: var(--soft); }
.section--accent { background: var(--yellow-soft); }
#signup { background: var(--yellow-soft); }
.section__head { max-width: 640px; margin: 0 auto clamp(36px, 5vw, 56px); text-align: center; }
.section__head h2 { font-size: clamp(1.7rem, 3.6vw, 2.5rem); }

/* ------- Feature cards ------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card { padding: 28px 26px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); transition: transform .18s ease, box-shadow .18s ease; }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-card__icon { display: inline-grid; place-items: center; width: 52px; height: 52px; background: var(--yellow); border-radius: 14px; margin-bottom: 16px; }
.feature-card__icon i { font-style: normal; font-size: 1.5rem; line-height: 1; filter: brightness(0); }
.feature-card h3 { font-size: 1.2rem; margin-bottom: .3em; }
.feature-card p { color: var(--muted); margin: 0; }

/* ------- Why / multi-user ------- */
.why { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; align-items: center; }
.why__head h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
.why__head p { color: var(--ink-soft); margin: 0; }
.why__points { display: grid; gap: 14px; }
.why__point { background: #fff; border: 1px solid var(--yellow-line); border-radius: var(--radius); padding: 18px 20px; }
.why__point strong { display: block; font-size: 1.08rem; margin-bottom: 2px; }
.why__point span { color: var(--muted); }

/* ------- Hero note / inline code ------- */
.hero__note { margin-top: 18px; font-size: .95rem; }
.hero__note code, .signup__intro code { background: var(--yellow); color: var(--blue-deep); padding: .12em .45em; border-radius: 6px; font-family: inherit; font-weight: 600; font-size: .95em; }

/* ------- Roles ------- */
.roles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.role-card { display: flex; gap: 16px; align-items: flex-start; background: #fff; border: 1px solid var(--yellow-line); border-radius: var(--radius); padding: 22px 24px; }
.role-card__icon { flex: 0 0 auto; display: inline-grid; place-items: center; width: 48px; height: 48px; background: var(--yellow); border-radius: 12px; }
.role-card__icon i { font-style: normal; font-size: 1.4rem; line-height: 1; filter: brightness(0); }
.role-card h3 { font-size: 1.12rem; margin-bottom: .2em; }
.role-card p { color: var(--muted); margin: 0; }

/* ------- Standards ------- */
.standards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.standard-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 22px; }
.standard-card__tag { display: inline-block; font-size: .8rem; font-weight: 700; color: var(--blue-deep); background: var(--yellow); border-radius: 999px; padding: .3em .85em; margin-bottom: 14px; }
.standard-card h3 { font-size: 1.12rem; margin-bottom: .3em; }
.standard-card p { color: var(--muted); margin: 0; font-size: .94rem; }
@media (max-width: 860px) { .standards { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .standards { grid-template-columns: 1fr; } }

/* ------- "ดูรายละเอียด" section link ------- */
.section-more { text-align: center; margin: 30px 0 0; }
.section-more a { font-weight: 600; color: var(--ink); border-bottom: 2px solid var(--blue); padding-bottom: 2px; }
.section-more a:hover { border-color: var(--ink); }

/* ------- Detail pages ------- */
.detail-hero { background: var(--yellow-soft); padding: clamp(48px, 8vw, 88px) 0 clamp(34px, 5vw, 52px); border-bottom: 1px solid var(--yellow-line); }
.detail-back { display: inline-block; font-size: .9rem; font-weight: 600; color: var(--ink-soft); margin-bottom: 14px; }
.detail-back:hover { color: var(--ink); }
.detail-hero h1 { font-size: clamp(1.9rem, 4.4vw, 2.8rem); margin-bottom: .3em; }
.detail-hero .lead { color: var(--ink-soft); max-width: 680px; margin: 0; }
.detail-modules { display: grid; gap: 22px; max-width: 880px; margin-inline: auto; }
.detail-module { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; }
.detail-module__head { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 14px; }
.detail-module__head h2 { font-size: 1.3rem; margin: 0; }
.detail-module__icon { display: inline-grid; place-items: center; width: 46px; height: 46px; background: var(--yellow); border-radius: 12px; }
.detail-module__icon i { font-style: normal; font-size: 1.35rem; line-height: 1; filter: brightness(0); }
.detail-status { font-size: .78rem; font-weight: 600; color: var(--ink-soft); background: #fff; border: 1px solid var(--yellow-line); border-radius: 999px; padding: .2em .7em; }
.detail-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.detail-list li { color: var(--ink-soft); padding-left: 24px; position: relative; }
.detail-list li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 700; }
.detail-note { max-width: 880px; margin: 22px auto 0; font-size: .88rem; }
.detail-cta { text-align: center; }
.detail-cta h2 { font-size: clamp(1.6rem, 3.4vw, 2.2rem); }
.lessons { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
@media (max-width: 720px) { .lessons { grid-template-columns: 1fr; } }

/* ------- Online platforms (dark highlight) ------- */
.section--dark { background: #0a0a0b; color: #fff; }
.section--dark .section__head h2 { color: #fff; }
.section--dark .muted { color: rgba(255, 255, 255, .72); }
.platforms { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 30px; }
.platform-chip { font-weight: 600; font-size: 1rem; padding: .55em 1.2em; border-radius: 999px; background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .2); color: #fff; }
.online-flow { display: flex; flex-wrap: wrap; gap: 10px 14px; justify-content: center; align-items: center; }
.online-flow__step { font-weight: 600; background: var(--blue); color: #fff; padding: .5em 1em; border-radius: 10px; }
.online-flow__arrow { color: var(--yellow); font-weight: 800; font-size: 1.1rem; }
.online-auto { text-align: center; margin: 24px 0 0; font-size: 1.1rem; color: #fff; }
.online-auto strong { background: var(--blue); color: #fff; padding: 0 .45em; border-radius: 6px; }

/* ------- Pricing ------- */
.price-group { margin-bottom: 44px; }
.price-group__head { margin-bottom: 22px; }
.price-group__head h3 { font-size: 1.5rem; margin-bottom: .15em; }
.price-group__badge { display: inline-block; vertical-align: middle; font-size: .8rem; font-weight: 700; color: #fff; background: var(--blue); border-radius: 999px; padding: .28em .85em; margin-left: 10px; }
.price-group__head p { margin: 0; max-width: 720px; }
.price-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.price-cards--single { grid-template-columns: minmax(0, 340px); }
.price-card { position: relative; display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; }
.price-card--featured { border-color: var(--blue); box-shadow: var(--shadow-lg); }
.price-card__badge { position: absolute; top: -11px; left: 24px; background: var(--blue); color: #fff; font-size: .78rem; font-weight: 700; padding: .25em .8em; border-radius: 999px; }
.price-card h4 { font-size: 1.15rem; margin-bottom: .5em; }
.price-card__price { margin: 0 0 .2em; display: flex; align-items: baseline; gap: 4px; }
.price-card__price .amount { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; }
.price-card__price .per { color: var(--muted); font-size: .95rem; }
.price-card__yearly { margin: 0 0 16px; font-size: .88rem; color: var(--ink-soft); background: var(--yellow-soft); border: 1px solid var(--yellow-line); border-radius: 8px; padding: 6px 10px; }
.price-card__lines { list-style: none; margin: 0 0 20px; padding: 0; display: grid; gap: 8px; }
.price-card__lines li { color: var(--ink-soft); font-size: .94rem; padding-left: 22px; position: relative; }
.price-card__lines li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 700; }
.price-card .btn { margin-top: auto; width: 100%; }
.price-foot { text-align: center; font-size: .9rem; margin-top: 8px; }

@media (max-width: 980px) { .price-cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 860px) { .roles { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .price-cards { grid-template-columns: 1fr; } }

/* ------- Sign-up form ------- */
.signup { display: grid; grid-template-columns: .9fr 1.1fr; gap: 40px; align-items: start; }
.signup__intro h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
.signup__form { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 28px; }
.signup-form label { display: block; font-size: .9rem; font-weight: 500; color: var(--ink); margin-bottom: 14px; }
.signup-form .req { color: var(--muted); }
.signup-form input, .signup-form select { display: block; width: 100%; margin-top: 6px; padding: 11px 13px; font: inherit; font-size: 1rem; border: 1px solid var(--line); border-radius: 10px; background: #fff; color: var(--ink); }
.signup-form input:focus, .signup-form select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px var(--yellow); }
.signup-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.signup-form .btn { width: 100%; margin-top: 4px; }
.signup-form__hint { font-size: .85rem; margin: 12px 0 0; text-align: center; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form-note { padding: 12px 16px; border-radius: 10px; margin-bottom: 18px; font-size: .95rem; }
.form-note--ok { background: var(--yellow-soft); border: 1px solid var(--yellow-line); color: var(--ink); }
.form-note--err { background: #fff; border: 1px solid var(--ink); color: var(--ink); }

/* ------- Contact ------- */
.contact { display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: center; }
.contact h2 { font-size: clamp(1.7rem, 3.6vw, 2.4rem); }
.contact__list { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 12px; }
.contact__list li { color: var(--ink-soft); }
.contact__list li > span { margin-right: 6px; filter: brightness(0); font-size: .95em; }
.contact__map { display: grid; place-content: center; justify-items: center; gap: 6px; text-align: center; min-height: 220px; padding: 36px; background: var(--yellow); border: 1px solid var(--yellow-line); border-radius: var(--radius); color: var(--ink); transition: transform .18s ease, box-shadow .18s ease; }
.contact__map:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); color: var(--ink); }
.contact__map-pin { font-size: 2.2rem; filter: brightness(0); }
.contact__map strong { font-size: 1.12rem; }

/* ------- Footer (black, blue top line) ------- */
.site-footer { position: relative; background: #0a0a0b; color: #c2c2cb; }
.site-footer::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--blue); }
.site-footer__inner { display: grid; grid-template-columns: 1fr 1.2fr; gap: 36px; padding: 56px 22px 40px; }
.site-footer .brand__name { color: #f3f3f6; }
.site-footer__co { font-weight: 600; color: #f3f3f6; margin: 14px 0 4px; }
.site-footer .muted { color: #86868f; }
.site-footer__contact { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site-footer__contact a { color: #c2c2cb; }
.site-footer__contact a:hover { color: #fff; }
.site-footer__bar { border-top: 1px solid rgba(255, 255, 255, .08); font-size: .9rem; color: #86868f; }
.site-footer__bar-inner { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; padding-block: 18px; }
.site-footer__copyright { margin: 0; }
.footer-menu { list-style: none; display: flex; gap: 16px; margin: 0; padding: 0; flex-wrap: wrap; }
.footer-menu a { color: #86868f; font-size: .9rem; }
.footer-menu a:hover { color: #fff; }
.site-footer__legal { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.footer-cookie { background: none; border: 0; padding: 0; font: inherit; font-size: .9rem; color: #86868f; cursor: pointer; }
.footer-cookie:hover { color: #fff; text-decoration: underline; }

/* ------- Cookie banner ------- */
.cookie { position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 80; max-width: 720px; margin-inline: auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 24px 50px -18px rgba(0, 0, 0, .45); }
.cookie[hidden] { display: none; }
.cookie__inner { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; padding: 16px 20px; }
.cookie__text { margin: 0; font-size: .94rem; color: var(--ink-soft); flex: 1 1 300px; }
.cookie__text a { text-decoration: underline; }
.cookie__actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ------- Content pages (legal etc.) ------- */
.container--narrow { max-width: 800px; }
.page__head { margin-bottom: 28px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.page__title { font-size: clamp(1.9rem, 4vw, 2.6rem); }
.page__content { color: var(--ink-soft); font-size: 1.02rem; }
.page__content h2 { font-size: 1.4rem; margin: 1.8em 0 .5em; color: var(--ink); }
.page__content h3 { font-size: 1.15rem; margin: 1.4em 0 .4em; color: var(--ink); }
.page__content ul, .page__content ol { margin: 0 0 1.2em; padding-left: 1.3em; }
.page__content a { color: var(--blue-deep); text-decoration: underline; }

/* ------- Responsive ------- */
@media (max-width: 860px) {
	.nav-toggle { display: inline-flex; }
	.nav { position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch; gap: 4px; background: #fff; border-bottom: 1px solid var(--line); padding: 14px 22px 22px; box-shadow: 0 20px 40px -24px rgba(0, 0, 0, .5); transform: translateY(-12px); opacity: 0; pointer-events: none; transition: transform .2s ease, opacity .2s ease; }
	.nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
	.nav > a { padding: 12px 6px; border-radius: 8px; }
	.nav > a.btn { margin-top: 6px; justify-content: center; }
	.why, .signup, .contact { grid-template-columns: 1fr; }
	.site-footer__inner { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
	.cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
	.cards { grid-template-columns: 1fr; }
	.signup-form__row { grid-template-columns: 1fr; }
	.hero__cta .btn { flex: 1 1 auto; }
}
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	.btn, .feature-card, .contact__map { transition: none; }
}