/* ========================================
   Surfblade Landing Page Styles
   Theme: "Океанская волна" — светлый, минималистичный
   ======================================== */

/* CSS Variables */
:root {
    --color-primary: #0891b2;
    --color-primary-dark: #0e7490;
    --color-primary-light: #22d3ee;
    --color-secondary: #e0f2fe;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-white: #ffffff;
    --color-bg: #f8fafc;

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --container-width: 1200px;
    --section-padding: 100px;
    --border-radius: 12px;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

/* ========================================
   Header
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.5px;
}

.logo--light {
    color: var(--color-white);
}

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

.nav__link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-light);
}

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

.header__phone {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
}

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

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #e0f2fe 0%, #ffffff 50%, #cffafe 100%);
    overflow: hidden;
}

.hero__wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 10px;
}

.hero__container {
    position: relative;
    z-index: 1;
    text-align: center;
    padding-top: 80px;
}

.hero__title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 700;
    line-height: 1.1;
    color: var(--color-text);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero__subtitle {
    font-size: clamp(18px, 2vw, 22px);
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

/* Button */
.btn {
    display: inline-block;
    padding: 16px 40px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn--primary {
    background: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 20px rgba(8, 145, 178, 0.3);
}

.btn--primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(8, 145, 178, 0.4);
}

/* ========================================
   Section Styles
   ======================================== */
.section__title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--color-text);
}

.section__title--left {
    text-align: left;
}

.section__subtitle {
    font-size: 18px;
    color: var(--color-text-light);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

/* ========================================
   About Section
   ======================================== */
.about {
    padding: var(--section-padding) 0;
    background: var(--color-white);
}

.about__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.about__card {
    text-align: center;
    padding: 40px 32px;
    background: var(--color-bg);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.about__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.about__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--color-secondary);
    border-radius: 50%;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.about__card-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.about__card-text {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ========================================
   Products Section
   ======================================== */
.products {
    padding: var(--section-padding) 0;
    background: var(--color-bg);
}

.products__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.product__card {
    background: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.product__card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product__image {
    height: 220px;
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary-light) 100%);
    position: relative;
}

.product__image::after {
    content: '';
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) rotate(-15deg);
    width: 80%;
    height: 20px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 100px;
}

.product__image--1 { background: linear-gradient(135deg, #e0f2fe 0%, #0891b2 100%); }
.product__image--2 { background: linear-gradient(135deg, #cffafe 0%, #22d3ee 100%); }
.product__image--3 { background: linear-gradient(135deg, #a5f3fc 0%, #0e7490 100%); }

.product__content {
    padding: 24px;
}

.product__title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
}

.product__desc {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 16px;
    line-height: 1.6;
}

.product__tag {
    display: inline-block;
    padding: 6px 14px;
    background: var(--color-secondary);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: var(--section-padding) 0;
    background: var(--color-white);
}

.features__content {
    max-width: 700px;
}

.features__list {
    list-style: none;
    margin-top: 40px;
}

.features__item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 0;
    font-size: 18px;
    border-bottom: 1px solid var(--color-secondary);
}

.features__item:last-child {
    border-bottom: none;
}

.features__check {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-secondary);
    border-radius: 50%;
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ========================================
   Delivery Section
   ======================================== */
.delivery {
    padding: var(--section-padding) 0;
    background: var(--color-bg);
}

.delivery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.delivery__card {
    background: var(--color-white);
    padding: 32px 24px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.delivery__card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.delivery__region {
    display: block;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.delivery__time {
    font-size: 14px;
    color: var(--color-primary);
    font-weight: 500;
}

.delivery__note {
    text-align: center;
    font-size: 16px;
    color: var(--color-primary);
    font-weight: 500;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    position: relative;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    padding-top: 180px;
}

.footer__wave {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 180px;
}

.footer__container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer__tagline {
    margin-top: 16px;
    opacity: 0.8;
    font-size: 15px;
}

.footer__title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    opacity: 0.9;
}

.footer__link {
    display: block;
    font-size: 15px;
    opacity: 0.8;
    margin-bottom: 12px;
    transition: opacity 0.3s ease;
}

.footer__link:hover {
    opacity: 1;
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
}

.footer__copy {
    font-size: 14px;
    opacity: 0.7;
    text-align: center;
}

/* ========================================
   Responsive Styles
   ======================================== */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }

    .header__container {
        height: 70px;
    }

    .nav {
        display: none;
    }

    .header__phone {
        font-size: 14px;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 80px;
    }

    .hero__title {
        font-size: 36px;
    }

    .hero__subtitle {
        font-size: 16px;
    }

    .section__title {
        font-size: 28px;
    }

    .section__subtitle {
        font-size: 16px;
        margin-bottom: 40px;
    }

    .about__grid,
    .products__grid {
        grid-template-columns: 1fr;
    }

    .features__content {
        max-width: 100%;
    }

    .features__item {
        font-size: 16px;
    }

    .footer__container {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .footer__info {
        order: -1;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: 28px;
    }

    .btn {
        padding: 14px 32px;
        font-size: 15px;
    }

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