/* ============================================
   Fonts
   ============================================ */
@font-face {
    font-family: 'Inter';
    src: url('assets/fonts/Inter-VariableFont_slnt,wght.ttf') format('truetype');
    font-weight: 100 900;
    font-display: swap;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #FFFFFF;
    --color-bg-light: #F7F8FA;
    --color-bg-dark: #01050D;
    --color-bg-dark-gradient: #160931;
    --color-primary: #4857FF;
    --color-primary-light: #5E6BFF;
    --color-primary-dark: #3642CC;
    --color-accent-red: #FF6B6B;
    --color-accent-green: #7EE6B6;
    --color-text: #01050D;
    --color-text-secondary: #4B5563;
    --color-text-muted: #6B7280;
    --color-text-white: #FFFFFF;
    --color-border: #E5E7EB;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --container-width: 1200px;
    --header-height: 80px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.1);
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

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

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

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
    white-space: nowrap;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-text-white);
    border-color: var(--color-primary);
}
.btn--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(72, 87, 255, 0.3);
}

.btn--outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-text);
}
.btn--outline:hover {
    background: var(--color-text);
    color: var(--color-text-white);
}

.btn--dark {
    background: var(--color-bg-dark);
    color: var(--color-text-white);
    border-color: var(--color-bg-dark);
}
.btn--dark:hover {
    background: #1a1f2e;
    border-color: #1a1f2e;
}

.btn--white {
    background: var(--color-text-white);
    color: var(--color-text);
    border-color: var(--color-text-white);
}
.btn--white:hover {
    background: var(--color-bg-light);
}

.btn--lg {
    padding: 16px 36px;
    font-size: 18px;
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    height: var(--header-height);
    transition: background 0.3s, border-color 0.3s;
}
.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--color-border);
}
.header.scrolled .logo__img--white { display: none; }
.header.scrolled .logo__img--dark { display: block; }
.header.scrolled .nav__link { color: var(--color-text); }
.header.scrolled .nav__link:hover,
.header.scrolled .nav__link.active { color: var(--color-primary); }
.header.scrolled .hamburger span { background: var(--color-text); }

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo__img {
    height: 36px;
    width: auto;
}
.logo__img--dark { display: none; }
.logo__img--white { display: block; }

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

.nav__link {
    font-size: 16px;
    font-weight: 400;
    color: var(--color-text-white);
    transition: color var(--transition);
    position: relative;
}
.nav__link:hover,
.nav__link.active {
    color: var(--color-primary-light);
}
.nav__link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
}

.header__buttons {
    display: flex;
    gap: 12px;
}
.header__buttons .btn {
    padding: 10px 20px;
    font-size: 14px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--color-text-white);
    transition: all var(--transition);
    border-radius: 1px;
}
.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 700px;
    display: flex;
    align-items: flex-end;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero__bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.hero__bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(1,5,13,0.75) 0%, rgba(22,9,49,0.6) 100%);
}

.hero__inner {
    position: relative;
    z-index: 1;
    width: 100%;
    padding-top: 0;
    padding-bottom: 80px;
}

.hero__content {
    max-width: 700px;
    padding-left: 0;
}

.hero__title {
    font-size: 56px;
    font-weight: 500;
    line-height: 1.1;
    color: var(--color-text-white);
    margin-bottom: 24px;
}

.hero__subtitle {
    font-size: 20px;
    font-weight: 400;
    color: rgba(255,255,255,0.8);
    line-height: 1.6;
    margin-bottom: 36px;
    max-width: 600px;
}

.hero__highlight {
    color: var(--color-text-white);
    font-weight: 700;
}

.hero__buttons {
    display: flex;
    gap: 16px;
}

.btn--white-outline {
    background: transparent;
    color: var(--color-text-white);
    border: 2px solid rgba(255,255,255,0.5);
}
.btn--white-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--color-text-white);
}

/* ============================================
   Section Labels & Titles
   ============================================ */
.section-label {
    font-size: 20px;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.section-title {
    font-size: 40px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 24px;
    line-height: 1.2;
}
.section-title--center {
    text-align: center;
}

.section-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: 48px;
}

/* ============================================
   Radial Gradient Decorations
   ============================================ */
.glow {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    filter: blur(100px);
    opacity: 0.15;
}
.glow--blue {
    background: radial-gradient(circle, #4857FF 0%, transparent 70%);
}
.glow--purple {
    background: radial-gradient(circle, #8B5CF6 0%, transparent 70%);
}
.glow--cyan {
    background: radial-gradient(circle, #06B6D4 0%, transparent 70%);
}
.glow--green {
    background: radial-gradient(circle, #7EE6B6 0%, transparent 70%);
}
.glow--coral {
    background: radial-gradient(circle, #FF6B6B 0%, transparent 70%);
    opacity: 0.08;
}

/* ============================================
   About Section
   ============================================ */
.about {
    padding: 100px 0;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.text-primary {
    color: var(--color-primary);
}

.about__content {
    margin-top: 32px;
}

.about__content--two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about__content p,
.about__left p,
.about__right p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.about__content .btn,
.about__right .btn {
    margin-top: 16px;
}

/* ============================================
   Advantages Section
   ============================================ */
.advantages {
    padding: 80px 0;
    background: var(--color-bg-light);
    position: relative;
    overflow: hidden;
}

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.advantage-card {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.advantage-card__icon {
    margin-bottom: 20px;
}

.advantage-card__title {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 12px;
    color: var(--color-text);
}

.advantage-card__text {
    font-size: 16px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* ============================================
   Products Section
   ============================================ */
.products {
    padding: 100px 0;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.products__grid {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-top: 48px;
}

.product-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    border-radius: var(--radius-xl);
    padding: 48px;
    align-items: center;
    overflow: hidden;
}

.product-card--dark {
    background: linear-gradient(135deg, #160931 0%, #1a0f3c 50%, #0d0624 100%);
    color: var(--color-text-white);
}

.product-card--light {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.product-card__logo {
    height: 40px;
    width: auto;
    margin-bottom: 12px;
}

.product-card__title {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 16px;
}

.product-card__text {
    font-size: 16px;
    line-height: 1.7;
    margin-bottom: 28px;
    opacity: 0.9;
}
.product-card--light .product-card__text {
    color: var(--color-text-secondary);
}

.product-card__buttons {
    display: flex;
    gap: 12px;
}

.product-card__image {
    border-radius: var(--radius-md);
    overflow: hidden;
}
.product-card__image img {
    width: 100%;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Technology Section
   ============================================ */
.technology {
    padding: 100px 0;
    background: var(--color-bg-light);
    position: relative;
    overflow: hidden;
}

.section-subtitle-left {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: 48px;
    max-width: 800px;
    line-height: 1.7;
}

/* Metrics row */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 56px;
}
.metric {
    text-align: center;
    padding: 32px 16px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.metric__number {
    display: block;
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
}
.metric__label {
    font-size: 14px;
    color: var(--color-text-muted);
    line-height: 1.4;
}

/* Benefits grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.benefit-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 24px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.benefit-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.benefit-card__icon {
    min-width: 32px;
    margin-top: 2px;
}
.benefit-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}
.benefit-card p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* Steps visual */
.steps-visual {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    margin-bottom: 48px;
}
.step-v {
    flex: 1;
    max-width: 300px;
    text-align: center;
    position: relative;
    padding: 0 24px;
}
.step-v__circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    position: relative;
    z-index: 1;
}
.step-v__connector {
    position: absolute;
    top: 40px;
    left: calc(50% + 40px);
    width: calc(100% - 80px);
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    z-index: 0;
}
.step-v:last-child .step-v__connector { display: none; }
.step-v__title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}
.step-v__text {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Product name highlights */
.product-name {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
}
.product-name--hf {
    color: var(--color-accent-red);
}
.product-name--an {
    color: var(--color-accent-green);
}
.product-card--dark .product-name--hf {
    color: var(--color-accent-red);
}
.product-card__subtitle {
    font-size: 16px;
    opacity: 0.7;
    margin-bottom: 16px;
}

/* ============================================
   How It Works Section
   ============================================ */
.how-it-works {
    padding: 100px 0;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.steps__grid {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 16px;
}

.step {
    flex: 1;
    max-width: 280px;
    text-align: center;
    padding: 32px 24px;
}

.step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-text-white);
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

.step__icon {
    margin-bottom: 20px;
}

.step__title {
    font-size: 20px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--color-text);
}

.step__text {
    font-size: 16px;
    color: var(--color-text-muted);
}

.step__arrow {
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.steps__cta {
    text-align: center;
    margin-top: 48px;
}

/* ============================================
   Approach Section
   ============================================ */
.approach {
    padding: 100px 0;
    background: var(--color-bg-light);
    position: relative;
    overflow: hidden;
}

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

.approach__text p {
    font-size: 20px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

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

.approach__feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.approach__feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-text-white);
    font-size: 14px;
    font-weight: 700;
    margin-top: 2px;
}

.approach__feature p {
    font-size: 18px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}
.approach__feature strong {
    color: var(--color-primary);
}

/* ============================================
   Team Section
   ============================================ */
.core-team {
    padding: 100px 0;
    background: linear-gradient(160deg, #EFF1FE 0%, #FAFBFF 55%, #F3F0FE 100%);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.team-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), transform var(--transition);
}
.team-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.team-card--wide {
    grid-column: 1 / -1;
}

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

.team-card__avatar {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-bg-light);
}
.team-card__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.team-card__avatar--placeholder {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}
.team-card__avatar--placeholder::after {
    content: '';
    width: 24px;
    height: 24px;
    background: rgba(255,255,255,0.35);
    border-radius: 50%;
}

.team-card__name {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
}

.team-card__role {
    font-size: 14px;
    color: var(--color-text-muted);
}

.team-card__points {
    list-style: none;
}
.team-card__points li {
    position: relative;
    padding-left: 26px;
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}
.team-card__points li:last-child {
    margin-bottom: 0;
}
.team-card__points li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 3px;
    width: 15px;
    height: 15px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234857FF' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 12.5l5 5L20 6.5'/%3E%3C/svg%3E") no-repeat center / contain;
}

/* ============================================
   Partners Section
   ============================================ */
.partners {
    padding: 40px 0;
    background: var(--color-bg-light);
    text-align: center;
}

.partners__label {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text-muted);
    letter-spacing: 1px;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    padding: 100px 0;
    background: var(--color-bg);
    position: relative;
    overflow: hidden;
}

.contact__inner {
    max-width: 700px;
    text-align: center;
}

.contact__text {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
}

.contact__buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 32px;
}

.contact__links {
    display: flex;
    gap: 24px;
    justify-content: center;
    font-size: 16px;
    color: var(--color-text-muted);
}
.contact__links span {
    cursor: pointer;
    transition: color var(--transition);
}
.contact__links span:hover {
    color: var(--color-primary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-bg-light);
    padding: 40px 0;
}

.footer__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 24px;
}

.footer__nav {
    display: flex;
    gap: 28px;
}
.footer__nav a {
    font-size: 16px;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}
.footer__nav a:hover {
    color: var(--color-primary);
}

.footer__cta {
    padding: 10px 24px;
    font-size: 14px;
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.footer__bottom p {
    font-size: 14px;
    color: var(--color-text-muted);
}

.footer__social {
    display: flex;
    gap: 16px;
}
.footer__social a {
    color: var(--color-text-muted);
    transition: color var(--transition);
}
.footer__social a:hover {
    color: var(--color-primary);
}

/* ============================================
   Biopsy Slider
   ============================================ */
.biopsy-slider {
    position: relative;
    width: 100%;
    aspect-ratio: 4/3;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: ew-resize;
    user-select: none;
}

.biopsy-slider__before,
.biopsy-slider__after {
    position: absolute;
    inset: 0;
}

.biopsy-slider__before img,
.biopsy-slider__after img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.biopsy-slider__after {
    clip-path: inset(0 0 0 50%);
}

.biopsy-slider__handle {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
}

.biopsy-slider__line {
    position: absolute;
    inset: 0;
    background: white;
    box-shadow: 0 0 8px rgba(0,0,0,0.3);
}

.biopsy-slider__knob {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    z-index: 11;
}

/* ============================================
   Modal
   ============================================ */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    padding: 48px;
    max-width: 560px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    animation: modalIn 0.3s ease;
}
@keyframes modalIn {
    from { opacity: 0; transform: translateY(20px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal__close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--color-text-muted);
    cursor: pointer;
    line-height: 1;
    padding: 4px;
    transition: color var(--transition);
}
.modal__close:hover { color: var(--color-text); }

.modal__title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.modal__subtitle {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 16px;
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color var(--transition);
    outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(72, 87, 255, 0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group textarea {
    resize: vertical;
}

.modal__submit {
    width: 100%;
    margin-top: 8px;
}

.modal__success {
    text-align: center;
    padding: 40px 0;
}
.modal__success svg { margin: 0 auto 20px; }
.modal__success h3 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--color-text);
}
.modal__success p {
    font-size: 16px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

@media (max-width: 768px) {
    .modal { padding: 32px 24px; }
    .form-row { grid-template-columns: 1fr; }
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
    .hero__title { font-size: 44px; }
    .section-title { font-size: 32px; }
    .advantages__grid { grid-template-columns: repeat(2, 1fr); }
    .metrics-row { grid-template-columns: repeat(2, 1fr); }
    .product-card { padding: 32px; }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
    }
    .nav.open { display: flex; }
    .hamburger { display: flex; }
    .header__buttons { display: none; }

    .hero__title { font-size: 36px; }
    .hero__subtitle { font-size: 18px; }
    .about__content--two-col { grid-template-columns: 1fr; }
    .metrics-row { grid-template-columns: repeat(2, 1fr); }
    .metric__number { font-size: 36px; }
    .benefits-grid { grid-template-columns: 1fr; }
    .steps-visual { flex-direction: column; align-items: center; }
    .step-v__connector { display: none !important; }
    .advantages__grid { grid-template-columns: 1fr; }

    .product-card {
        grid-template-columns: 1fr;
        padding: 24px;
    }

    .section-title { font-size: 28px; }
    .tech__grid { grid-template-columns: 1fr; }

    .steps__grid { flex-direction: column; align-items: center; }
    .step__arrow { transform: rotate(90deg); padding-top: 0; }

    .approach__content { grid-template-columns: 1fr; }
    .team-grid { grid-template-columns: 1fr; }

    .contact__buttons { flex-direction: column; }
    .contact__links { flex-direction: column; gap: 12px; }

    .footer__top { flex-direction: column; gap: 20px; text-align: center; }
    .footer__nav { flex-wrap: wrap; justify-content: center; }
    .footer__bottom { flex-direction: column; gap: 16px; text-align: center; }
}