/* Goggle Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@600;700&family=Manrope:wght@400;500&display=swap');

/* CSS Variables */
:root {
	--color-background: #111827;
	--color-surface: #1f2937;
	--color-primary: #14b8a6;
	--color-primary-hover: #0d9488;
	--color-text-primary: #d1d5db;
	--color-text-secondary: #9ca3af;
	--color-border: #374151;

	--font-heading: 'Exo 2', sans-serif;
	--font-body: 'Manrope', sans-serif;
}

/* Global Styles */
*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	scroll-behavior: smooth;
}

body {
	font-family: var(--font-body);
	font-size: 16px;
	line-height: 1.6;
	color: var(--color-text-primary);
	background-color: var(--color-background);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

a {
	color: var(--color-primary);
	text-decoration: none;
	transition: color 0.3s ease;
}

a:hover {
	color: var(--color-primary-hover);
}

ul {
	list-style: none;
}

img {
	max-width: 100%;
	height: auto;
	display: block;
}

button {
	cursor: pointer;
	border: none;
	background: none;
	font-family: inherit;
}

.container {
	max-width: 1240px;
	margin-left: auto;
	margin-right: auto;
	padding-left: 20px;
	padding-right: 20px;
}

/* Header */
.header {
	padding: 20px 0;
	position: sticky;
	top: 0;
	z-index: 100;
	background-color: rgba(17, 24, 39, 0.8);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--color-border);
}

.header__container {
	display: flex;
	justify-content: space-between;
	align-items: center;
}

.header__logo {
	display: flex;
	align-items: center;
	gap: 12px;
	font-family: var(--font-heading);
	font-size: 24px;
	font-weight: 700;
	color: var(--color-text-primary);
}

.header__logo:hover {
	color: var(--color-primary);
}

.header__logo svg {
	width: 32px;
	height: 32px;
	color: var(--color-primary);
	transition: transform 0.3s ease;
}

.header__logo:hover svg {
	transform: rotate(90deg);
}

.header__menu-list {
	display: flex;
	align-items: center;
	gap: 32px;
}

.header__menu-link {
	font-size: 16px;
	font-weight: 500;
	color: var(--color-text-primary);
	padding: 8px 0;
	position: relative;
}

.header__menu-link::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	height: 2px;
	background-color: var(--color-primary);
	transform: scaleX(0);
	transform-origin: right;
	transition: transform 0.3s ease-out;
}

.header__menu-link:hover::after {
	transform: scaleX(1);
	transform-origin: left;
}

.header__burger {
	display: none;
	color: var(--color-text-primary);
}

/* Footer */
.footer {
	background-color: var(--color-surface);
	padding: 60px 0 30px;
	border-top: 1px solid var(--color-border);
}

.footer__grid {
	display: grid;
	grid-template-columns: 2fr 1fr 1fr 1.5fr;
	gap: 40px;
	margin-bottom: 40px;
}

.footer__column--info {
	display: flex;
	flex-direction: column;
	gap: 16px;
}

.footer__logo {
	display: flex;
	align-items: center;
	gap: 12px;
	font-family: var(--font-heading);
	font-size: 24px;
	font-weight: 700;
	color: var(--color-text-primary);
}

.footer__logo svg {
	width: 32px;
	height: 32px;
	color: var(--color-primary);
}

.footer__description {
	font-size: 14px;
	color: var(--color-text-secondary);
	max-width: 250px;
}

.footer__title {
	font-family: var(--font-heading);
	font-size: 18px;
	margin-bottom: 16px;
	color: var(--color-text-primary);
}

.footer__list {
	display: flex;
	flex-direction: column;
	gap: 12px;
}

.footer__list--contacts {
	gap: 16px;
}

.footer__list--contacts li {
	display: flex;
	align-items: center;
	gap: 12px;
}

.footer__icon {
	width: 18px;
	height: 18px;
	color: var(--color-primary);
}

.footer__link,
.footer__text {
	font-size: 14px;
	color: var(--color-text-secondary);
}

.footer__link:hover {
	color: var(--color-primary);
}

.footer__bottom {
	border-top: 1px solid var(--color-border);
	padding-top: 30px;
	text-align: center;
	font-size: 14px;
	color: var(--color-text-secondary);
}

/* Responsive Styles */
@media (max-width: 992px) {
	.header__nav {
		display: none;
	}

	.header__burger {
		display: block;
	}

	.header__nav.is-active {
		display: flex;
		position: fixed;
		top: 77px; /* Высота хедера */
		left: 0;
		width: 100%;
		height: calc(100vh - 77px);
		background-color: var(--color-background);
		flex-direction: column;
		justify-content: center;
		align-items: center;
	}

	.header__menu-list {
		flex-direction: column;
		gap: 40px;
	}

	.header__menu-link {
		font-size: 24px;
	}

	.footer__grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 576px) {
	.footer__grid {
		grid-template-columns: 1fr;
	}
}

/* --- General Purpose Button --- */
.btn {
	display: inline-block;
	padding: 14px 32px;
	font-family: var(--font-heading);
	font-size: 16px;
	font-weight: 600;
	color: var(--color-background);
	background-color: var(--color-primary);
	border-radius: 8px;
	text-align: center;
	transition: background-color 0.3s ease, transform 0.3s ease;
}

.btn:hover {
	background-color: var(--color-primary-hover);
	transform: translateY(-3px);
	color: var(--color-background);
}

/* --- Hero Section --- */
.hero {
	position: relative;
	min-height: calc(100vh - 78px); /* Full height minus header height */
	display: flex;
	align-items: center;
	padding: 80px 0;
	overflow: hidden;
}

.hero__container {
	display: grid;
	grid-template-columns: 1fr 1fr;
	align-items: center;
	gap: 60px;
	position: relative;
	z-index: 2;
}

.hero__title {
	font-family: var(--font-heading);
	font-size: 52px;
	font-weight: 700;
	line-height: 1.2;
	margin-bottom: 20px;
	color: #fff;
}

.hero__subtitle {
	font-size: 18px;
	color: var(--color-text-secondary);
	margin-bottom: 40px;
	max-width: 500px;
}

.hero__image {
	width: 100%;
	max-width: 500px;
	margin: 0 auto;
	border-radius: 16px;
	opacity: 0.7;
}

/* Animated background shapes */
.hero__bg-shape {
	position: absolute;
	border-radius: 50%;
	background: radial-gradient(
		circle,
		var(--color-primary) 0%,
		rgba(20, 184, 166, 0) 70%
	);
	z-index: 1;
	opacity: 0.3;
}

.hero__bg-shape--1 {
	width: 300px;
	height: 300px;
	top: 10%;
	left: 5%;
}

.hero__bg-shape--2 {
	width: 200px;
	height: 200px;
	top: 60%;
	left: 40%;
}

.hero__bg-shape--3 {
	width: 400px;
	height: 400px;
	top: 20%;
	right: 5%;
}

/* --- Hero Responsive --- */
@media (max-width: 992px) {
	.hero__container {
		grid-template-columns: 1fr;
		text-align: center;
	}

	.hero__subtitle {
		margin-left: auto;
		margin-right: auto;
	}

	.hero__visual {
		grid-row: 1; /* Image appears above text on mobile */
		margin-bottom: 40px;
	}

	.hero__image {
		max-width: 400px;
	}

	.hero__title {
		font-size: 40px;
	}
}

@media (max-width: 576px) {
	.hero__title {
		font-size: 32px;
	}
	.hero__subtitle {
		font-size: 16px;
	}
}

/* Animation initial states (elements are hidden) */
.hero__title,
.hero__subtitle,
.hero__cta,
.hero__image {
	opacity: 0;
	transform: translateY(20px);
}

/* --- General Section Styles --- */
.section {
	padding: 80px 0;
}

.section:nth-of-type(odd) {
	/* Чередование фона секций */
	background-color: var(--color-surface);
}

.section__header {
	text-align: center;
	max-width: 700px;
	margin: 0 auto 60px;
}

.section__title {
	font-family: var(--font-heading);
	font-size: 42px;
	font-weight: 700;
	margin-bottom: 16px;
	color: #fff;
}

.section__subtitle {
	font-size: 18px;
	color: var(--color-text-secondary);
}

/* --- "What is AI" Section --- */
.what-is-ai__grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 30px;
}

.what-is-ai__card {
	background-color: var(--color-background);
	border: 1px solid var(--color-border);
	padding: 30px;
	border-radius: 12px;
	transition: transform 0.3s ease, border-color 0.3s ease;
}

.what-is-ai__card:hover {
	transform: translateY(-8px);
	border-color: var(--color-primary);
}

.what-is-ai__card-icon {
	width: 50px;
	height: 50px;
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: var(--color-surface);
	border-radius: 8px;
	margin-bottom: 24px;
}

.what-is-ai__card-icon i {
	width: 28px;
	height: 28px;
	color: var(--color-primary);
}

.what-is-ai__card-title {
	font-family: var(--font-heading);
	font-size: 22px;
	margin-bottom: 12px;
	color: var(--color-text-primary);
}

.what-is-ai__card-text {
	font-size: 15px;
	color: var(--color-text-secondary);
}

/* Scroll animation initial state */
.what-is-ai__card {
	opacity: 0;
	transform: translateY(30px);
	transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.what-is-ai__card.is-visible {
	opacity: 1;
	transform: translateY(0);
}

/* --- "What is AI" Responsive --- */
@media (max-width: 992px) {
	.what-is-ai__grid {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 576px) {
	.section {
		padding: 60px 0;
	}
	.section__title {
		font-size: 32px;
	}
	.section__subtitle {
		font-size: 16px;
	}
}

/* --- Examples Section --- */
.examples__tabs-nav {
	display: flex;
	justify-content: center;
	gap: 15px;
	margin-bottom: 40px;
	flex-wrap: wrap;
}

.examples__tab-btn {
	display: flex;
	align-items: center;
	gap: 10px;
	padding: 12px 24px;
	border: 1px solid var(--color-border);
	border-radius: 8px;
	font-size: 16px;
	font-weight: 500;
	color: var(--color-text-secondary);
	background-color: transparent;
	transition: all 0.3s ease;
}

.examples__tab-btn:hover {
	background-color: var(--color-surface);
	color: var(--color-text-primary);
}

.examples__tab-btn.is-active {
	background-color: var(--color-primary);
	color: var(--color-background);
	border-color: var(--color-primary);
}

.examples__tab-btn i {
	width: 20px;
	height: 20px;
}

.examples__tab-panel {
	display: none;
	grid-template-columns: repeat(2, 1fr);
	gap: 30px;
	animation: fadeIn 0.5s ease-in-out;
}

.examples__tab-panel.is-active {
	display: grid;
}

@keyframes fadeIn {
	from {
		opacity: 0;
		transform: translateY(10px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

.example-card {
	background-color: var(--color-surface);
	border: 1px solid var(--color-border);
	padding: 24px;
	border-radius: 12px;
}

.example-card__title {
	font-family: var(--font-heading);
	font-size: 20px;
	margin-bottom: 20px;
	color: var(--color-text-primary);
}

.example-card__request,
.example-card__result {
	font-size: 15px;
	line-height: 1.6;
	color: var(--color-text-secondary);
	padding-left: 20px;
	border-left: 2px solid var(--color-border);
}

.example-card__request {
	margin-bottom: 16px;
	border-color: var(--color-primary-hover);
}

.example-card__result {
	border-color: var(--color-primary);
}

.example-card strong {
	color: var(--color-text-primary);
	font-weight: 500;
}

/* --- Examples Responsive --- */
@media (max-width: 992px) {
	.examples__tab-panel {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 576px) {
	.examples__tabs-nav {
		gap: 10px;
	}
	.examples__tab-btn {
		padding: 10px 16px;
		font-size: 14px;
	}
}

/* --- Tools Section --- */
.tools__grid {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 30px;
}

.tool-card {
	background-color: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: 12px;
	padding: 24px;
	display: flex;
	flex-direction: column;
	transition: transform 0.3s ease, border-color 0.3s ease;
}

.tool-card:hover {
	transform: translateY(-8px);
	border-color: var(--color-primary);
}

.tool-card__header {
	display: flex;
	align-items: center;
	gap: 16px;
	margin-bottom: 20px;
}

.tool-card__logo {
	width: 50px;
	height: 50px;
	border-radius: 8px;
	background-color: var(--color-background);
	object-fit: cover;
}

.tool-card__title {
	font-family: var(--font-heading);
	font-size: 22px;
	color: var(--color-text-primary);
}

.tool-card__category {
	display: inline-block;
	background-color: var(--color-primary-hover);
	color: #e0f2f1;
	padding: 4px 12px;
	border-radius: 99px; /* Pill shape */
	font-size: 12px;
	font-weight: 500;
	margin-bottom: 12px;
}

.tool-card__description {
	font-size: 15px;
	color: var(--color-text-secondary);
	line-height: 1.6;
}

/* Scroll animation initial state */
.tool-card {
	opacity: 0;
	transform: translateY(30px);
	transition: opacity 0.6s ease-out, transform 0.6s ease-out,
		border-color 0.3s ease;
}
.tool-card.is-visible {
	opacity: 1;
	transform: translateY(0);
}

/* --- Tools Responsive --- */
@media (max-width: 992px) {
	.tools__grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 576px) {
	.tools__grid {
		grid-template-columns: 1fr;
	}
}

/* --- Start Section --- */
.start__steps-container {
	position: relative;
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 40px;
}

/* Timeline connector line - Desktop only */
.start__steps-container::after {
	content: '';
	position: absolute;
	top: 40px;
	left: 40px;
	right: 40px;
	height: 2px;
	background: repeating-linear-gradient(
		90deg,
		var(--color-border),
		var(--color-border) 10px,
		transparent 10px,
		transparent 20px
	);
	z-index: 1;
}

.start__step {
	position: relative;
	padding-top: 40px; /* Space for the number */
	z-index: 2;
}

.start__step-number {
	position: absolute;
	top: 0;
	left: 0;
	font-family: var(--font-heading);
	font-size: 64px;
	font-weight: 700;
	color: var(--color-surface);
	-webkit-text-stroke: 1px var(--color-border);
	line-height: 1;
}

.start__step-content {
	background-color: var(--color-surface);
	padding: 30px;
	border-radius: 12px;
	border: 1px solid var(--color-border);
	height: 100%;
}

.start__step-title {
	font-family: var(--font-heading);
	font-size: 22px;
	margin-bottom: 16px;
	color: var(--color-text-primary);
}

.start__step-description {
	font-size: 15px;
	color: var(--color-text-secondary);
}

/* Scroll animation initial state */
.start__step {
	opacity: 0;
	transform: translateY(30px);
	transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.start__step.is-visible {
	opacity: 1;
	transform: translateY(0);
}

/* --- Start Responsive --- */
@media (max-width: 992px) {
	.start__steps-container {
		grid-template-columns: 1fr;
	}
	.start__steps-container::after {
		display: none; /* Hide timeline on non-desktop */
	}
	.start__step {
		padding-top: 0;
		padding-left: 60px; /* Space for number */
		min-height: 80px;
	}
	.start__step-number {
		top: 50%;
		left: 0;
		transform: translateY(-50%);
		font-size: 48px;
	}
}

/* --- Contact Section --- */
.contact__grid {
	display: grid;
	grid-template-columns: 1.2fr 1fr;
	gap: 60px;
	align-items: flex-start;
}

.contact__form {
	display: flex;
	flex-direction: column;
	gap: 20px;
}

.form-group {
	display: flex;
	flex-direction: column;
}

.form-label {
	font-size: 14px;
	font-weight: 500;
	margin-bottom: 8px;
	color: var(--color-text-secondary);
}

.form-input {
	width: 100%;
	padding: 14px 16px;
	background-color: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: 8px;
	color: var(--color-text-primary);
	font-size: 16px;
	transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-input::placeholder {
	color: #6b7280;
}

.form-input:focus {
	outline: none;
	border-color: var(--color-primary);
	box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.2);
}

.form-group--checkbox {
	flex-direction: row;
	align-items: flex-start;
	gap: 12px;
	margin-top: 5px;
}

.form-checkbox {
	margin-top: 5px;
	width: 16px;
	height: 16px;
	flex-shrink: 0;
}

.form-checkbox-label {
	font-size: 14px;
	color: var(--color-text-secondary);
	line-height: 1.5;
}
.form-checkbox-label a {
	text-decoration: underline;
}

.contact__btn {
	margin-top: 10px;
}

.form-message-container {
	margin-top: 20px;
	min-height: 50px; /* Reserve space */
}

.form-message {
	padding: 12px 16px;
	border-radius: 8px;
	font-size: 15px;
	animation: fadeIn 0.5s;
}

.form-message--success {
	background-color: rgba(20, 184, 166, 0.1);
	border: 1px solid var(--color-primary);
	color: var(--color-primary);
}

/* Contact Info styles */
.contact__info-title {
	font-family: var(--font-heading);
	font-size: 24px;
	margin-bottom: 12px;
}
.contact__info-text {
	color: var(--color-text-secondary);
	margin-bottom: 24px;
}
.contact__info-list {
	display: flex;
	flex-direction: column;
	gap: 20px;
}
.contact__info-list li {
	display: flex;
	align-items: center;
	gap: 16px;
	font-size: 18px;
}
.contact__info-icon {
	width: 24px;
	height: 24px;
	color: var(--color-primary);
}

/* --- Contact Responsive --- */
@media (max-width: 992px) {
	.contact__grid {
		grid-template-columns: 1fr;
	}
}

/* --- Cookie Pop-up --- */
.cookie-popup {
	position: fixed;
	bottom: 0;
	left: 0;
	width: 100%;
	background-color: var(--color-surface);
	border-top: 1px solid var(--color-border);
	padding: 20px 0;
	z-index: 200;
	transform: translateY(100%);
	transition: transform 0.5s ease-in-out;
}

.cookie-popup.is-visible {
	transform: translateY(0);
}

.cookie-popup__container {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 20px;
}

.cookie-popup__text {
	color: var(--color-text-secondary);
	font-size: 14px;
}

.cookie-popup__text a {
	text-decoration: underline;
}

.cookie-popup__btn {
	padding: 10px 24px;
	flex-shrink: 0; /* Чтобы кнопка не сжималась */
}

@media (max-width: 576px) {
	.cookie-popup__container {
		flex-direction: column;
		text-align: center;
	}
}

/* --- Policy Pages Styles --- */
.pages {
	padding: 60px 0;
}

.pages .container {
	max-width: 800px; /* Оптимальная ширина для чтения */
}

.pages h1,
.pages h2 {
	font-family: var(--font-heading);
	color: #fff;
	margin-bottom: 1rem;
}

.pages h1 {
	font-size: 42px;
	margin-bottom: 2rem;
	border-bottom: 1px solid var(--color-border);
	padding-bottom: 1rem;
}

.pages h2 {
	font-size: 28px;
	margin-top: 2.5rem;
}

.pages p {
	font-size: 16px;
	line-height: 1.7;
	color: var(--color-text-secondary);
	margin-bottom: 1.5rem;
}

.pages ul {
	list-style-type: disc;
	padding-left: 20px;
	margin-bottom: 1.5rem;
	color: var(--color-text-secondary);
}

.pages li {
	margin-bottom: 0.75rem;
	padding-left: 5px;
}

.pages a {
	text-decoration: underline;
}

.pages strong {
	color: var(--color-text-primary);
	font-weight: 600;
}