:root {
    /* Palette */
    --primary: #3b82f6;
    --primary-dark: #1d4ed8;
    --accent: #60a5fa;

    --dark-bg: #0f172a;
    --dark-surface: #1e293b;

    --light-bg: #f8fafc;
    --white: #ffffff;

    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-light: #f1f5f9;

    /* Spacing & Radius */
    --radius-xl: 24px;
    --radius-md: 12px;
    --radius-full: 999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.5);
}

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

body {
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--text-main);
    background-color: var(--light-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

/* LAYOUT */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* HEADER */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 1000;
    transition: transform 0.3s ease;
}

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

.header__logo {
    width: 40px;
    height: 40px;
    object-fit: contain;
    /* Если логотип черный, можно инвертировать фильтром, если он PNG */
    /* filter: invert(1); */
}

.header__title {
    color: var(--white);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* HERO SECTION */
.hero {
    position: relative;
    background: var(--dark-bg);
    /* Современный градиент на фоне */
    background-image:
        radial-gradient(circle at 15% 50%, rgba(59, 130, 246, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(147, 197, 253, 0.1), transparent 25%);
    color: var(--white);
    padding: 180px 0 120px;
    overflow: hidden;
}

.hero__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 64px;
    position: relative;
    z-index: 1;
}

.hero__content-left {
    max-width: 540px;
}

.hero__title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
    background: linear-gradient(to right, #ffffff, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__subtitle {
    font-size: 20px;
    color: #94a3b8;
    margin-bottom: 40px;
    font-weight: 400;
}

/* BUTTONS */
.button-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 18px 42px;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: var(--white);
    font-weight: 600;
    font-size: 16px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
    transition: all 0.2s ease;
}

.button-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.5);
}

.button-primary:active {
    transform: translateY(0);
}

/* HERO IMAGE STYLING */
.hero__screenshot {
    position: relative;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    padding: 12px;
    /* Frame effect */
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
    transition: transform 0.5s ease;
}

.hero__screenshot:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.hero__screenshot img {
    border-radius: 12px;
    width: 100%;
    height: auto;
    display: block;
}

/* SECTIONS COMMON */
.section {
    padding: 100px 0;
}

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

.section__title {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section__desc {
    font-size: 18px;
    color: var(--text-muted);
}

.section__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

/* CARDS */
.feature-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    border: 1px solid rgba(226, 232, 240, 0.8);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(59, 130, 246, 0.3);
}

.feature-card__icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: #eff6ff;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 28px;
}

.feature-card__title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-main);
}

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

/* AUDIENCE SECTION */
.section--audience {
    background: #fff;
}

.audience-card {
    text-align: center;
    padding: 32px;
    border-radius: var(--radius-xl);
    background: var(--light-bg);
    border: 1px solid transparent;
    transition: 0.3s;
}

.audience-card:hover {
    background: #fff;
    box-shadow: var(--shadow-md);
    border-color: #e2e8f0;
}

.audience-card__icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    box-shadow: var(--shadow-sm);
}

.audience-card__title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

/* FOOTER & FORM */
.footer {
    background: var(--dark-bg);
    color: var(--text-light);
    padding: 80px 0 40px;
    position: relative;
}

.footer__grid {
    display: grid;
    grid-template-columns: 1fr 480px;
    gap: 80px;
    margin-bottom: 60px;
}

.footer__content h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(to right, #fff, #cbd5e1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer__subtitle {
    font-size: 18px;
    color: #94a3b8;
    margin-bottom: 48px;
}

.contact-block {
    margin-bottom: 32px;
}

.contact-label {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #64748b;
    margin-bottom: 8px;
    font-weight: 600;
}

.contact-value {
    font-size: 24px;
    font-weight: 500;
    color: var(--white);
}

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

/* FORM STYLES */
.form-card {
    background: var(--dark-surface);
    padding: 40px;
    border-radius: 32px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.form__row {
    margin-bottom: 20px;
}

.form__label {
    display: block;
    font-size: 14px;
    color: #cbd5e1;
    margin-bottom: 8px;
    font-weight: 500;
}

.form__input {
    width: 100%;
    background: #0f172a;
    border: 2px solid #334155;
    border-radius: 12px;
    padding: 14px 16px;
    color: var(--white);
    font-size: 16px;
    outline: none;
    transition: all 0.2s;
}

.form__input::placeholder {
    color: #475569;
}

.form__input:focus {
    border-color: var(--primary);
    background: #0f172a;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.checkbox-wrapper {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 24px 0;
}

.checkbox-wrapper input {
    margin-top: 4px;
    accent-color: var(--primary);
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.checkbox-wrapper label {
    font-size: 13px;
    color: #94a3b8;
    line-height: 1.4;
    cursor: pointer;
}

.form__submit {
    width: 100%;
    padding: 16px;
    border-radius: 12px;
    background: var(--primary);
    color: white;
    font-weight: 600;
    font-size: 16px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.form__submit:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 13px;
    color: #64748b;
}

/* RESPONSIVE */
@media (max-width: 1024px) {

    .hero__inner,
    .footer__grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero__inner {
        text-align: center;
    }

    .hero__content-left {
        margin: 0 auto;
    }

    .hero__screenshot {
        transform: none;
        max-width: 600px;
        margin: 0 auto;
    }

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

    .form-card {
        padding: 24px;
    }
}

@media (max-width: 640px) {
    .hero__title {
        font-size: 42px;
    }

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

    .footer__bottom {
        flex-direction: column;
        align-items: flex-start;
    }
}