/* --- Глобальные настройки (Етап 0) --- */
:root {
    /* Палитра */
    --color-primary: #3B82F6; /* Яркий синий - технология */
    --color-primary-dark: #2563EB;
    --color-secondary: #10B981; /* Зеленый - успех, легкость */
    --color-dark: #1E293B; /* Темно-серый для текста */
    --color-gray: #64748B; /* Серый для подписей */
    --color-light: #F8FAFC; /* Светлый фон */
    --color-white: #FFFFFF;
    
    /* Шрифты */
    --font-main: 'Manrope', sans-serif;
    --font-head: 'Outfit', sans-serif;
    
    /* Размеры */
    --container-width: 1200px;
    --header-height: 80px;
    --radius-sm: 8px;
    --radius-md: 16px;
    
    /* Переходы */
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    color: var(--color-dark);
    background-color: var(--color-white);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-family: var(--font-head);
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 16px;
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

/* --- Хедер (Етап 1) --- */
.header {
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
}

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

.header__logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header__logo-text {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 22px;
    color: var(--color-dark);
    letter-spacing: -0.02em;
}

.header__nav {
    display: flex;
    align-items: center;
}

.header__menu {
    display: flex;
    gap: 32px;
}

.header__link {
    font-weight: 500;
    color: var(--color-dark);
    font-size: 15px;
    position: relative;
}

.header__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

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

.header__link:hover::after {
    width: 100%;
}

.header__burger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-dark);
}

/* --- Футер (Етап 2) --- */
.footer {
    background-color: var(--color-light);
    padding: 80px 0 30px;
    border-top: 1px solid rgba(0,0,0,0.05);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer__logo {
    display: inline-block;
    margin-bottom: 20px;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 24px;
    color: var(--color-primary);
}

.footer__desc {
    color: var(--color-gray);
    font-size: 15px;
    max-width: 300px;
}

.footer__title {
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 24px;
    color: var(--color-dark);
}

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

.footer__link {
    color: var(--color-gray);
    font-size: 15px;
}

.footer__link:hover {
    color: var(--color-primary);
    padding-left: 4px;
}

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

.footer__contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--color-gray);
    font-size: 15px;
}

.footer__icon {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.footer__bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(0,0,0,0.1);
    text-align: center;
    color: var(--color-gray);
    font-size: 14px;
}

/* --- Адаптив --- */
@media (max-width: 992px) {
    .header__menu, .header__btn {
        display: none;
    }
    
    .header__burger {
        display: block;
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 576px) {
    .footer__grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .header__container {
        padding: 0 16px;
    }
}

/* --- Hero Section (Етап 3) --- */
.hero {
    padding-top: calc(var(--header-height) + 60px);
    padding-bottom: 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.05), transparent 40%);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero__badge-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
    70% { box-shadow: 0 0 0 6px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

.hero__title {
    font-family: var(--font-head);
    font-size: 56px;
    line-height: 1.1;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 24px;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.hero__subtitle strong {
    color: var(--color-dark);
    font-weight: 600;
}

.hero__actions {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.btn--outline {
    background: transparent;
    border: 2px solid rgba(100, 116, 139, 0.2);
    color: var(--color-dark);
}

.btn--outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.hero__note {
    font-size: 13px;
    color: #94A3B8;
}

/* Визуальная часть */
.hero__visual {
    position: relative;
    height: 500px;
    width: 100%;
    background: #F8FAFC;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.03);
}

#neural-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Плавающая карточка */
.floating-card {
    position: absolute;
    bottom: 40px;
    left: -20px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    padding: 16px 24px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    animation: float 4s ease-in-out infinite;
}

.hero__card-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #3B82F6, #10B981);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.hero__card-text {
    display: flex;
    flex-direction: column;
}

.hero__card-label {
    font-size: 12px;
    color: var(--color-gray);
}

.hero__card-value {
    font-weight: 700;
    color: var(--color-dark);
    font-family: var(--font-head);
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0); }
}

/* Адаптив Hero */
@media (max-width: 992px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero__badge, .hero__actions, .hero__subtitle {
        justify-content: center;
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero__visual {
        height: 350px;
        order: -1; /* Візуал зверху на мобільних */
    }
    
    .hero__title {
        font-size: 40px;
    }
    
    .floating-card {
        left: 20px;
        bottom: 20px;
    }
}

/* --- Заголовки секцій (Common) --- */
section {
    padding: 100px 0;
}

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

.section-label {
    display: inline-block;
    color: var(--color-primary);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 13px;
    margin-bottom: 12px;
}

.section-title {
    font-family: var(--font-head);
    font-size: 36px;
    color: var(--color-dark);
    margin-bottom: 16px;
    font-weight: 700;
}

.section-desc {
    color: var(--color-gray);
    font-size: 18px;
}

/* --- Features Section --- */
.features {
    background-color: var(--color-white);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--color-light);
    padding: 32px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: var(--color-white);
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.feature-card__icon {
    width: 50px;
    height: 50px;
    background: var(--color-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin-bottom: 24px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.feature-card--accent {
    background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.feature-card--accent .feature-card__icon {
    background: var(--color-primary);
    color: var(--color-white);
}

.feature-card__title {
    font-family: var(--font-head);
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--color-dark);
}

.feature-card__text {
    color: var(--color-gray);
    font-size: 15px;
    line-height: 1.6;
}

/* --- Cases Section (Tabs) --- */
.cases {
    background-color: #F8FAFC;
}

.tabs-nav {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tabs-nav__btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    background: var(--color-white);
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-gray);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.tabs-nav__btn i {
    width: 18px;
    height: 18px;
}

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

.tabs-nav__btn.active {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.tabs-content {
    min-height: 400px;
    position: relative;
}

.tab-pane {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-pane.active {
    display: block;
}

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

.case-card {
    background: var(--color-white);
    border-radius: 24px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr 1fr;
    box-shadow: 0 20px 40px rgba(0,0,0,0.06);
}

.case-card__image {
    height: 100%;
    min-height: 300px;
}

.case-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.case-card__content {
    padding: 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.case-card__content h3 {
    font-family: var(--font-head);
    font-size: 28px;
    margin-bottom: 16px;
    color: var(--color-dark);
}

.case-card__content p {
    color: var(--color-gray);
    margin-bottom: 24px;
}

.case-card__list {
    margin-bottom: 32px;
}

.case-card__list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-weight: 500;
    color: var(--color-dark);
}

.case-card__list li i {
    color: var(--color-secondary);
    width: 20px;
    height: 20px;
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 16px;
}

.btn-text:hover {
    gap: 12px;
}

/* Адаптив Cases */
@media (max-width: 768px) {
    .case-card {
        grid-template-columns: 1fr;
    }
    
    .case-card__image {
        height: 250px;
        min-height: auto;
    }
    
    .case-card__content {
        padding: 24px;
    }
    
    .section-title {
        font-size: 28px;
    }
}

/* --- Reviews Section --- */
.reviews {
    background-color: #F8FAFC;
}

.reviews__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.review-card {
    background: var(--color-white);
    padding: 30px;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0,0,0,0.03);
    transition: var(--transition);
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.06);
}

.review-card__stars {
    display: flex;
    gap: 4px;
    color: #F59E0B; /* Gold */
    margin-bottom: 16px;
}

.review-card__stars i {
    width: 18px;
    height: 18px;
    fill: #F59E0B;
}

.review-card__text {
    font-style: italic;
    color: var(--color-dark);
    margin-bottom: 24px;
    font-size: 15px;
}

.review-card__author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-card__avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    background: #E2E8F0;
}

.review-card__name {
    font-weight: 700;
    color: var(--color-dark);
    font-size: 15px;
}

.review-card__role {
    font-size: 13px;
    color: var(--color-gray);
}

/* --- FAQ Section --- */
.faq__wrapper {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq__item {
    background: var(--color-white);
    border: 1px solid rgba(0,0,0,0.05);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: var(--transition);
}

.faq__question {
    padding: 20px 24px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--color-dark);
    font-size: 17px;
}

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

.faq__icon {
    transition: transform 0.3s ease;
    width: 20px;
    height: 20px;
}

.faq__item.active .faq__icon {
    transform: rotate(180deg);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 24px;
    color: var(--color-gray);
    font-size: 15px;
}

.faq__item.active .faq__answer {
    padding-bottom: 24px;
}

/* --- Contact Section --- */
.contact {
    background: linear-gradient(135deg, var(--color-dark) 0%, #0F172A 100%);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}

.contact::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15), transparent 70%);
}

.contact__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.contact__title {
    font-family: var(--font-head);
    font-size: 42px;
    margin-bottom: 16px;
    color: var(--color-white);
}

.contact__desc {
    color: #94A3B8;
    margin-bottom: 40px;
    font-size: 18px;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact__info-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact__icon-box {
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.contact__form-wrapper {
    background: var(--color-white);
    padding: 40px;
    border-radius: 24px;
    color: var(--color-dark);
}

.form__group {
    margin-bottom: 20px;
}

.form__label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form__input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-sm);
    font-family: var(--font-main);
    font-size: 16px;
    transition: var(--transition);
}

.form__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form__checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 24px;
    font-size: 13px;
    color: var(--color-gray);
}

.form__checkbox-group input {
    margin-top: 4px;
}

.form__btn {
    width: 100%;
    gap: 10px;
}

/* Success Message */
.success-message {
    text-align: center;
    padding: 40px 0;
    animation: fadeIn 0.5s ease;
}

.success-icon {
    width: 60px;
    height: 60px;
    background: var(--color-secondary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.success-icon i {
    width: 32px;
    height: 32px;
}

/* --- Cookie Popup --- */
.cookie-popup {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 600px;
    background: var(--color-dark);
    color: var(--color-white);
    padding: 16px 24px;
    border-radius: 12px;
    display: none; /* JS will show this */
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    z-index: 9999;
    align-items: center;
}

.cookie-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    gap: 20px;
}

.cookie-content p {
    font-size: 14px;
    margin: 0;
}

.cookie-content a {
    color: var(--color-primary);
    text-decoration: underline;
}

.btn--sm {
    padding: 8px 20px;
    font-size: 14px;
}

/* --- Стилі для сторінок політик (Етап 5) --- */
.pages {
    padding: 120px 0 80px;
    max-width: 800px;
    margin: 0 auto;
}

.pages h1 {
    font-family: var(--font-head);
    font-size: 36px;
    margin-bottom: 24px;
    color: var(--color-dark);
}

.pages h2 {
    font-family: var(--font-head);
    font-size: 24px;
    margin: 32px 0 16px;
    color: var(--color-dark);
}

.pages p {
    margin-bottom: 16px;
    color: var(--color-gray);
}

.pages ul {
    margin-bottom: 24px;
    padding-left: 20px;
    list-style: disc;
    color: var(--color-gray);
}

.pages li {
    margin-bottom: 8px;
}

.pages a {
    color: var(--color-primary);
    text-decoration: underline;
}

/* Адаптив контактів */
@media (max-width: 992px) {
    .contact__container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact__info {
        flex-direction: row;
        flex-wrap: wrap;
    }
}

@media (max-width: 576px) {
    .cookie-content {
        flex-direction: column;
        align-items: flex-start;
    }
    .cookie-content button {
        align-self: flex-end;
    }
    .contact__info {
        flex-direction: column;
    }
}