/**
 * IV Tours USA Ads — design system.
 *
 * 1. Tokens        2. Reset         3. Typography   4. Layout
 * 5. Buttons       6. Forms         7. Topbar/header 8. Hero
 * 9. Section head 10. Utilities
 */

/* -------------------------------------------------------------------------
 * 1. Tokens
 * ---------------------------------------------------------------------- */

:root {
	/* Brand palette, aligned with the existing IV Tours USA identity. */
	--ads-primary: #0d2137;
	--ads-secondary: #17405f;
	--ads-accent: #c9a227;
	--ads-accent-soft: #e0c56a;
	--ads-dark: #071522;
	--ads-ink: #0b1a28;
	--ads-light: #fbf9f5;
	--ads-warm: #f4efe7;
	--ads-muted: #5d6b7a;

	--ads-text: #14212e;
	--ads-text-soft: #4c5a68;
	--ads-text-invert: #f6f4f0;
	--ads-text-invert-soft: rgba(246, 244, 240, 0.74);

	--ads-border: rgba(13, 33, 55, 0.12);
	--ads-white: #ffffff;

	--ads-font-display: "Inter", "Helvetica Neue", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
	--ads-font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--ads-font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;

	--ads-size-hero: clamp(2.6rem, 1.3rem + 5.4vw, 6rem);
	--ads-size-h1: clamp(2.1rem, 1.35rem + 3vw, 3.6rem);
	--ads-size-h2: clamp(1.9rem, 1.3rem + 2.4vw, 3.2rem);
	--ads-size-h3: clamp(1.2rem, 1.05rem + 0.6vw, 1.55rem);
	--ads-size-h4: clamp(1.05rem, 1rem + 0.3vw, 1.2rem);
	--ads-size-body: clamp(1rem, 0.97rem + 0.18vw, 1.06rem);
	--ads-size-small: 0.9375rem;
	--ads-size-tiny: 0.8125rem;
	--ads-size-eyebrow: 0.75rem;

	--ads-leading-tight: 1.04;
	--ads-leading-heading: 1.14;
	--ads-leading-body: 1.66;

	--ads-eyebrow-track: 0.18em;

	--ads-3xs: 0.25rem;
	--ads-2xs: 0.5rem;
	--ads-xs: 0.75rem;
	--ads-sm: 1rem;
	--ads-md: 1.5rem;
	--ads-lg: 2.25rem;
	--ads-xl: 3.5rem;
	--ads-2xl: clamp(3.25rem, 2rem + 5.5vw, 6.5rem);
	--ads-3xl: clamp(4rem, 2.5rem + 7vw, 8rem);

	--ads-container: 1340px;
	--ads-gutter: clamp(1.15rem, 0.6rem + 2.4vw, 3.25rem);

	--ads-radius: 4px;
	--ads-radius-sm: 3px;
	--ads-radius-lg: 10px;
	--ads-radius-pill: 999px;

	--ads-shadow-sm: 0 1px 2px rgba(7, 21, 34, 0.06);
	--ads-shadow-md: 0 18px 40px -24px rgba(7, 21, 34, 0.4);
	--ads-shadow-lg: 0 40px 90px -50px rgba(7, 21, 34, 0.6);

	--ads-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
	--ads-transition: 220ms var(--ads-ease);
	--ads-transition-slow: 520ms var(--ads-ease);

	/* The sticky header height. Section headings use scroll-margin-top against
	   this value so the header never covers them. */
	--ads-header-h: 72px;
	--ads-topbar-h: 44px;
}

@media (max-width: 1024px) {
	:root {
		--ads-header-h: 64px;
	}
}

/* -------------------------------------------------------------------------
 * 2. Reset
 * ---------------------------------------------------------------------- */

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

html {
	-webkit-text-size-adjust: 100%;
	scroll-behavior: smooth;
	scroll-padding-top: var(--ads-header-h);
}

body {
	margin: 0;
	background: var(--ads-light);
	color: var(--ads-text);
	font-family: var(--ads-font-body);
	font-size: var(--ads-size-body);
	line-height: var(--ads-leading-body);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
}

body.nav-open,
body.modal-open {
	overflow: hidden;
}

img,
picture,
svg,
video {
	max-width: 100%;
	display: block;
	height: 100%;
}

img {
	height: auto;
}

button,
input,
select,
textarea {
	font: inherit;
	color: inherit;
}

button {
	cursor: pointer;
}

a {
	color: inherit;
	text-decoration: none;
}

ul,
ol {
	margin: 0;
	padding: 0;
	list-style: none;
}

figure,
blockquote,
p,
h1,
h2,
h3,
h4,
h5,
h6 {
	margin: 0;
}

hr {
	border: 0;
	border-top: 1px solid var(--ads-border);
	margin: var(--ads-lg) 0;
}

:focus-visible {
	outline: 2px solid var(--ads-accent);
	outline-offset: 3px;
	border-radius: 2px;
}

/* -------------------------------------------------------------------------
 * 3. Typography
 * ---------------------------------------------------------------------- */

h1,
h2,
h3,
h4,
h5,
h6 {
	font-family: var(--ads-font-display);
	font-weight: 600;
	letter-spacing: -0.025em;
	line-height: var(--ads-leading-heading);
	color: inherit;
	text-wrap: balance;
}

p {
	text-wrap: pretty;
}

.ads-head__eyebrow {
	font-size: var(--ads-size-eyebrow);
	letter-spacing: var(--ads-eyebrow-track);
	text-transform: uppercase;
	font-weight: 600;
	color: var(--ads-accent);
	margin-bottom: var(--ads-2xs);
}

.ads-section--ink .ads-head__eyebrow,
.ads-section--dark .ads-head__eyebrow,
.ads-hero .ads-head__eyebrow,
.ads-hero__eyebrow {
	color: var(--ads-accent-soft);
}

.ads-stars {
	display: inline-flex;
	gap: 2px;
	line-height: 1;
}

.ads-stars .ads-icon {
	width: 15px;
	height: 15px;
	color: rgba(201, 162, 39, 0.32);
	fill: none;
}

.ads-stars .ads-icon.is-full,
.ads-stars .ads-icon.is-half {
	color: var(--ads-accent);
	fill: currentColor;
}

.ads-icon {
	width: 1em;
	height: 1em;
	flex: none;
}

.ads-icon--lg {
	width: 26px;
	height: 26px;
}

/* -------------------------------------------------------------------------
 * 4. Layout
 * ---------------------------------------------------------------------- */

.ads-container {
	width: 100%;
	max-width: var(--ads-container);
	margin-inline: auto;
	padding-inline: var(--ads-gutter);
}

.ads-section {
	position: relative;
	padding-block: var(--ads-2xl);
	scroll-margin-top: var(--ads-header-h);
}

.ads-section--tight {
	padding-block: var(--ads-xl);
}

.ads-section--warm {
	background: var(--ads-warm);
}

.ads-section--light {
	background: var(--ads-white);
}

.ads-section--ink {
	background: var(--ads-dark);
	color: var(--ads-text-invert);
}

.ads-section--ink h2,
.ads-section--ink h3,
.ads-section--dark h2,
.ads-section--dark h3 {
	color: var(--ads-text-invert);
}

.ads-head {
	max-width: 60ch;
	margin-bottom: var(--ads-xl);
}

.ads-head--center {
	text-align: center;
	margin-inline: auto;
}

.ads-head__title {
	font-size: var(--ads-size-h2);
}

.ads-head__text {
	margin-top: var(--ads-sm);
	font-size: var(--ads-size-h4);
	font-weight: 400;
	color: var(--ads-text-soft);
}

.ads-section--ink .ads-head__text {
	color: var(--ads-text-invert-soft);
}

/* -------------------------------------------------------------------------
 * 5. Buttons
 * ---------------------------------------------------------------------- */

.ads-btn {
	--btn-bg: var(--ads-primary);
	--btn-fg: var(--ads-white);
	--btn-border: var(--ads-primary);

	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.6em;
	padding: 0.95em 1.6em;
	border: 1px solid var(--btn-border);
	border-radius: var(--ads-radius-pill);
	background: var(--btn-bg);
	color: var(--btn-fg);
	font-size: var(--ads-size-small);
	font-weight: 600;
	line-height: 1.2;
	text-align: center;
	cursor: pointer;
	transition:
		background var(--ads-transition),
		color var(--ads-transition),
		border-color var(--ads-transition),
		transform var(--ads-transition);
}

.ads-btn:hover {
	transform: translateY(-2px);
}

.ads-btn__icon {
	width: 18px;
	height: 18px;
	transition: transform var(--ads-transition);
}

.ads-btn:hover .ads-btn__icon {
	transform: translateX(3px);
}

.ads-btn--primary {
	--btn-bg: var(--ads-accent);
	--btn-border: var(--ads-accent);
	--btn-fg: var(--ads-ink);
	box-shadow: var(--ads-shadow-md);
}

.ads-btn--primary:hover {
	--btn-bg: var(--ads-accent-soft);
	--btn-border: var(--ads-accent-soft);
}

.ads-btn--light {
	--btn-bg: rgba(255, 255, 255, 0.08);
	--btn-border: rgba(255, 255, 255, 0.5);
	--btn-fg: var(--ads-white);
	backdrop-filter: blur(6px);
}

.ads-btn--light:hover {
	--btn-bg: rgba(255, 255, 255, 0.18);
	--btn-border: rgba(255, 255, 255, 0.9);
}

.ads-btn--ghost {
	--btn-bg: transparent;
	--btn-border: var(--ads-border);
	--btn-fg: var(--ads-text);
}

.ads-btn--ghost:hover {
	--btn-border: var(--ads-primary);
	--btn-bg: rgba(13, 33, 55, 0.04);
}

.ads-btn--whatsapp {
	--btn-bg: transparent !important;
	--btn-border: rgba(255, 255, 255, 0.5) !important;
	--btn-fg: var(--ads-white) !important;
}

.ads-section:not(.ads-section--ink) .ads-btn--whatsapp,
.ads-modal .ads-btn--whatsapp,
.ads-footer .ads-btn--whatsapp,
.ads-faq .ads-btn--whatsapp {
	--btn-border: var(--ads-border);
	--btn-fg: var(--ads-text);
}

.ads-btn--whatsapp:hover {
	--btn-bg: rgba(37, 211, 102, 0.12);
	--btn-border: #25d366;
}

.ads-btn--block {
	display: flex;
	width: 100%;
}

.ads-btn[aria-busy="true"] {
	opacity: 0.75;
	pointer-events: none;
}

/* -------------------------------------------------------------------------
 * 6. Forms
 * ---------------------------------------------------------------------- */

.ads-field {
	display: flex;
	flex-direction: column;
	gap: 0.35rem;
	min-width: 0;
}

.ads-field--full {
	grid-column: 1 / -1;
}

.ads-field--consent {
	margin-top: var(--ads-2xs);
}

.ads-field__label {
	font-size: var(--ads-size-tiny);
	font-weight: 600;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	color: var(--ads-text-soft);
}

.ads-field__control input,
.ads-field__control textarea {
	width: 100%;
	padding: 0.8rem 0.95rem;
	border: 1px solid var(--ads-border);
	border-radius: var(--ads-radius);
	background: var(--ads-white);
	font-size: var(--ads-size-small);
	transition: border-color var(--ads-transition), box-shadow var(--ads-transition);
	appearance: none;
}

.ads-field__control textarea {
	resize: vertical;
	min-height: 84px;
}

.ads-field__control input:focus,
.ads-field__control textarea:focus {
	outline: none;
	border-color: var(--ads-accent);
	box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.22);
}

.ads-field__control input[aria-invalid="true"] {
	border-color: #b3261e;
}

.ads-field__control--static {
	padding: 0.7rem 0.9rem;
	border: 1px solid var(--ads-border);
	border-radius: var(--ads-radius);
	background: var(--ads-warm);
}

.ads-field__value {
	font-size: var(--ads-size-small);
	font-weight: 600;
}

.ads-field__hint {
	font-size: var(--ads-size-tiny);
	color: var(--ads-muted);
}

.ads-field__error {
	font-size: var(--ads-size-tiny);
	color: #b3261e;
}

.ads-checkbox {
	display: flex;
	align-items: flex-start;
	gap: 0.6rem;
	font-size: var(--ads-size-tiny);
	color: var(--ads-text-soft);
	cursor: pointer;
}

.ads-checkbox input {
	width: 18px;
	height: 18px;
	margin-top: 2px;
	flex: none;
	accent-color: var(--ads-accent);
}

.ads-modal__honeypot {
	position: absolute;
	left: -9999px;
	width: 1px;
	height: 1px;
	overflow: hidden;
}

/* -------------------------------------------------------------------------
 * 7. Topbar and header
 *
 * The topbar is in normal flow and scrolls away. The header is sticky, so the
 * two can never overlap at the top of the page.
 * ---------------------------------------------------------------------- */

.ads-topbar {
	background: var(--ads-dark);
	color: var(--ads-text-invert-soft);
	font-size: var(--ads-size-tiny);
}

.ads-topbar__inner {
	max-width: var(--ads-container);
	margin-inline: auto;
	padding: 0.55rem var(--ads-gutter);
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--ads-sm);
}

.ads-topbar__text {
	margin: 0;
}

.ads-topbar__links {
	display: flex;
	align-items: center;
	gap: var(--ads-md);
}

.ads-topbar__item {
	display: inline-flex;
	align-items: center;
	gap: 0.4em;
	color: var(--ads-text-invert);
	transition: color var(--ads-transition);
}

a.ads-topbar__item:hover {
	color: var(--ads-accent-soft);
}

.ads-topbar__item .ads-icon {
	width: 15px;
	height: 15px;
	color: var(--ads-accent-soft);
}

.ads-header {
	position: sticky;
	top: 0;
	z-index: 90;
	background: transparent;
	border-bottom: 1px solid transparent;
	transition:
		background var(--ads-transition),
		border-color var(--ads-transition),
		box-shadow var(--ads-transition);
}

.ads-header.is-stuck {
	background: rgba(255, 255, 255, 0.95);
	backdrop-filter: blur(14px);
	border-bottom-color: var(--ads-border);
	box-shadow: var(--ads-shadow-sm);
}

.ads-header__inner {
	max-width: var(--ads-container);
	margin-inline: auto;
	padding: 0 var(--ads-gutter);
	min-height: var(--ads-header-h);
	display: flex;
	align-items: center;
	gap: var(--ads-lg);
}

.ads-header__brand {
	display: flex;
	align-items: center;
	flex: none;
}

.ads-header__brand img {
	max-height: 40px;
	width: auto;
}

.ads-brand {
	display: inline-flex;
	align-items: center;
	gap: 0.55rem;
}

.ads-brand__mark {
	display: grid;
	place-items: center;
	width: 36px;
	height: 36px;
	border-radius: 50%;
	border: 1px solid var(--ads-accent);
	color: var(--ads-accent);
	font-size: 0.78rem;
	font-weight: 700;
	letter-spacing: 0.04em;
}

.ads-brand__name {
	font-family: var(--ads-font-display);
	font-weight: 600;
	font-size: 1rem;
	letter-spacing: 0.01em;
	color: var(--ads-white);
	transition: color var(--ads-transition);
}

.ads-header.is-stuck .ads-brand__name,
.ads-brand--footer .ads-brand__name {
	color: var(--ads-text);
}

.ads-nav {
	margin-inline-start: auto;
}

.ads-nav__list {
	display: flex;
	align-items: center;
	gap: clamp(0.5rem, 1.3vw, 1.35rem);
}

.ads-nav__link {
	display: block;
	padding: 0.5rem 0.2rem;
	font-size: var(--ads-size-small);
	font-weight: 500;
	color: var(--ads-white);
	transition: color var(--ads-transition);
}

.ads-header.is-stuck .ads-nav__link {
	color: var(--ads-text);
}

.ads-nav__link:hover,
.ads-header.is-stuck .ads-nav__link:hover {
	color: var(--ads-accent);
}

.ads-header__actions {
	display: flex;
	align-items: center;
	gap: var(--ads-xs);
	flex: none;
}

.ads-header__cta {
	padding: 0.68em 1.2em;
}

.ads-nav-toggle {
	display: none;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	border: 1px solid rgba(255, 255, 255, 0.45);
	border-radius: var(--ads-radius-pill);
	background: transparent;
	color: var(--ads-white);
	transition: color var(--ads-transition), border-color var(--ads-transition);
}

.ads-header.is-stuck .ads-nav-toggle {
	color: var(--ads-text);
	border-color: var(--ads-border);
}

.ads-nav-toggle .ads-icon {
	width: 22px;
	height: 22px;
}

.ads-nav-toggle__close {
	display: none;
}

.ads-nav-toggle[aria-expanded="true"] .ads-nav-toggle__open {
	display: none;
}

.ads-nav-toggle[aria-expanded="true"] .ads-nav-toggle__close {
	display: block;
}

.ads-mobile-nav {
	position: fixed;
	inset: 0;
	top: 0;
	padding-top: var(--ads-header-h);
	background: var(--ads-white);
	overflow-y: auto;
	z-index: 88;
	opacity: 0;
	visibility: hidden;
	transition: opacity var(--ads-transition), visibility var(--ads-transition);
}

.ads-mobile-nav.is-open {
	opacity: 1;
	visibility: visible;
}

.ads-mobile-nav__panel {
	padding: var(--ads-md) var(--ads-gutter) var(--ads-2xl);
}

.ads-mobile-nav__list li {
	border-bottom: 1px solid var(--ads-border);
}

.ads-mobile-nav__list a {
	display: block;
	padding: 0.95rem 0;
	font-family: var(--ads-font-display);
	font-size: 1.15rem;
	font-weight: 600;
	color: var(--ads-text);
}

.ads-mobile-nav__contact {
	margin-top: var(--ads-lg);
	display: grid;
	gap: var(--ads-sm);
}

.ads-mobile-nav__link {
	font-size: var(--ads-size-small);
	font-weight: 600;
	color: var(--ads-text);
}

/* -------------------------------------------------------------------------
 * 8. Hero
 * ---------------------------------------------------------------------- */

.ads-hero {
	position: relative;
	display: flex;
	align-items: flex-end;
	min-height: min(88vh, 860px);
	margin-top: calc(var(--ads-header-h) * -1);
	padding-top: calc(var(--ads-header-h) + 4rem);
	padding-bottom: clamp(3.5rem, 8vh, 7rem);
	color: var(--ads-white);
	overflow: hidden;
	isolation: isolate;
	scroll-margin-top: var(--ads-header-h);
}

.ads-hero__media {
	position: absolute;
	inset: 0;
	z-index: -2;
	background: linear-gradient(140deg, #0d2137 0%, #17405f 50%, #0b1a28 100%);
}

.ads-hero__media picture,
.ads-hero__img {
	width: 100%;
	height: 100%;
}

.ads-hero__img {
	object-fit: cover;
	object-position: center 38%;
}

.ads-hero__scrim {
	position: absolute;
	inset: 0;
	z-index: 0;
	background:
		linear-gradient(180deg, rgba(7, 21, 34, 0.68) 0%, rgba(7, 21, 34, 0.28) 34%, rgba(7, 21, 34, 0.85) 100%),
		radial-gradient(90% 70% at 18% 62%, rgba(7, 21, 34, 0.2) 0%, rgba(7, 21, 34, 0.82) 100%);
}

.ads-hero__content {
	max-width: 44rem;
}

.ads-hero__title {
	font-size: var(--ads-size-hero);
	line-height: 0.98;
	letter-spacing: -0.03em;
	margin-bottom: var(--ads-md);
}

.ads-hero__title-line {
	display: block;
}

.ads-hero__title-line--accent {
	color: var(--ads-accent-soft);
	font-family: var(--ads-font-serif);
	font-style: italic;
	font-weight: 400;
	letter-spacing: -0.015em;
}

.ads-hero__text {
	font-size: var(--ads-size-h4);
	color: rgba(255, 255, 255, 0.86);
	max-width: 40rem;
}

.ads-hero__services {
	margin-top: var(--ads-xs);
	font-size: var(--ads-size-small);
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: rgba(255, 255, 255, 0.6);
}

.ads-hero__actions {
	display: flex;
	flex-wrap: wrap;
	gap: var(--ads-xs);
	margin-top: var(--ads-lg);
}

.ads-hero__trust {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--ads-md);
	margin-top: var(--ads-lg);
	font-size: var(--ads-size-small);
	color: rgba(255, 255, 255, 0.78);
}

.ads-hero__trust li {
	display: flex;
	align-items: center;
	gap: 0.45rem;
}

/* -------------------------------------------------------------------------
 * 9. Currency selector
 * ---------------------------------------------------------------------- */

.ads-currency {
	position: relative;
}

.ads-currency__toggle {
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
	padding: 0.6em 0.85em;
	border: 1px solid rgba(255, 255, 255, 0.45);
	border-radius: var(--ads-radius-pill);
	background: rgba(255, 255, 255, 0.08);
	color: var(--ads-white);
	font-size: var(--ads-size-tiny);
	font-weight: 600;
	letter-spacing: 0.04em;
	transition: background var(--ads-transition), border-color var(--ads-transition), color var(--ads-transition);
}

.ads-header.is-stuck .ads-currency__toggle {
	color: var(--ads-text);
	border-color: var(--ads-border);
	background: transparent;
}

.ads-currency__toggle:hover {
	background: rgba(255, 255, 255, 0.18);
}

.ads-header.is-stuck .ads-currency__toggle:hover {
	background: var(--ads-warm);
}

.ads-currency__chevron {
	width: 14px;
	height: 14px;
	transition: transform var(--ads-transition);
}

.ads-currency.is-open .ads-currency__chevron {
	transform: rotate(180deg);
}

.ads-currency__list {
	position: absolute;
	top: calc(100% + 8px);
	right: 0;
	min-width: 190px;
	padding: 0.35rem;
	background: var(--ads-white);
	border: 1px solid var(--ads-border);
	border-radius: var(--ads-radius-lg);
	box-shadow: var(--ads-shadow-lg);
	z-index: 95;
}

.ads-currency__option {
	display: flex;
	flex-direction: column;
	gap: 0.1rem;
	width: 100%;
	padding: 0.55rem 0.7rem;
	border: 0;
	border-radius: var(--ads-radius);
	background: transparent;
	text-align: left;
	transition: background var(--ads-transition);
}

.ads-currency__option:hover {
	background: var(--ads-warm);
}

.ads-currency__option.is-selected {
	background: rgba(201, 162, 39, 0.14);
}

.ads-currency__option-code {
	font-size: var(--ads-size-small);
	font-weight: 700;
	color: var(--ads-text);
}

.ads-currency__option-name {
	font-size: var(--ads-size-tiny);
	color: var(--ads-muted);
}

/* -------------------------------------------------------------------------
 * 10. Utilities
 * ---------------------------------------------------------------------- */

.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:focus {
	position: fixed !important;
	top: 0.75rem;
	left: 0.75rem;
	z-index: 999;
	width: auto;
	height: auto;
	padding: 0.75rem 1.1rem;
	background: var(--ads-primary);
	color: var(--ads-white);
	border-radius: var(--ads-radius);
	clip: auto;
}

.ads-no-core .ads-main::before {
	content: "";
}