* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #111827;
    color: #f9fafb;
    line-height: 1.5;
}

a {
    color: #93c5fd;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    width: min(1100px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    background: #0f172a;
    border-bottom: 1px solid #1f2937;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    gap: 16px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: #f9fafb;
}

.site-nav {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.site-main {
    padding: 48px 0;
}

.hero {
    padding: 48px 0;
}

.hero h1 {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 40px;
}

.hero p {
    max-width: 720px;
    margin-bottom: 24px;
    color: #d1d5db;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.button {
    display: inline-block;
    padding: 12px 18px;
    border-radius: 10px;
    background: #2563eb;
    color: #fff;
    font-weight: 600;
}

.button-secondary {
    background: #374151;
}

.site-footer {
    border-top: 1px solid #1f2937;
    padding: 20px 0;
    color: #9ca3af;
}

.nav-button {
    background: transparent;
    border: 0;
    color: #93c5fd;
    cursor: pointer;
    font: inherit;
    padding: 0;
}

.nav-button:hover {
    text-decoration: underline;
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.catalog-card {
    background: #1f2937;
    border: 1px solid #374151;
    border-radius: 14px;
    padding: 20px;
}

.catalog-card h2 {
    margin-top: 0;
    margin-bottom: 12px;
    font-size: 24px;
}

.catalog-category {
    color: #93c5fd;
    font-size: 14px;
    margin-bottom: 10px;
}

.catalog-price {
    font-size: 24px;
    font-weight: 700;
    margin: 18px 0;
}

.catalog-image,
.product-detail-image,
.paid-content-image {
    width: 100%;
    max-width: 420px;
    height: auto;
    display: block;
    border-radius: 12px;
    margin-bottom: 16px;
}

.orders-list {
    display: grid;
    gap: 20px;
    margin: 24px 0;
}

.order-card {
    background: #1f2937;
    border: 1px solid #374151;
    border-radius: 14px;
    padding: 20px;
}

.order-card h3 {
    margin-top: 0;
}

.paid-content {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #374151;
}

/* ===== Адаптивность ===== */

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

input,
textarea,
select,
button {
    font: inherit;
}

input,
textarea,
select {
    width: 100%;
    max-width: 100%;
    padding: 10px 12px;
    border: 1px solid #374151;
    border-radius: 10px;
    background: #111827;
    color: #f9fafb;
}

label {
    display: inline-block;
    margin-bottom: 6px;
}

form p {
    margin-bottom: 16px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-inner {
    align-items: center;
}

.site-nav a,
.site-nav form {
    display: inline-flex;
    align-items: center;
}

.catalog-card,
.order-card {
    overflow: hidden;
}

.product-detail-image,
.catalog-image,
.paid-content-image {
    object-fit: cover;
}

.hero {
    padding: 32px 0;
}

.hero h1 {
    font-size: 36px;
    line-height: 1.15;
}

.hero h2 {
    font-size: 28px;
    line-height: 1.2;
}

.order-card p,
.catalog-card p {
    word-break: break-word;
}

/* ===== Планшеты ===== */
@media (max-width: 900px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .site-nav {
        width: 100%;
        gap: 12px;
    }

    .hero {
        padding: 28px 0;
    }

    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 15px;
    }

    .catalog-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

/* ===== Телефоны ===== */
@media (max-width: 640px) {
    body {
        font-size: 15px;
    }

    .container {
        width: min(100%, calc(100% - 24px));
    }

    .site-main {
        padding: 24px 0;
    }

    .site-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }

    .logo {
        font-size: 22px;
    }

    .hero {
        padding: 20px 0;
    }

    .hero h1 {
        font-size: 28px;
        margin-bottom: 12px;
    }

    .hero h2 {
        font-size: 22px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .button,
    .button-secondary {
        width: 100%;
        text-align: center;
    }

    .catalog-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .catalog-card,
    .order-card {
        padding: 16px;
        border-radius: 12px;
    }

    .catalog-card h2 {
        font-size: 20px;
    }

    .catalog-price {
        font-size: 20px;
        margin: 14px 0;
    }

    .product-detail-image,
    .catalog-image,
    .paid-content-image {
        border-radius: 10px;
    }

    form p {
        margin-bottom: 14px;
    }
}

/* ===== Очень маленькие экраны ===== */
@media (max-width: 400px) {
    .hero h1 {
        font-size: 24px;
    }

    .logo {
        font-size: 20px;
    }

    .catalog-card h2 {
        font-size: 18px;
    }

    .catalog-price {
        font-size: 18px;
    }
}