/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #f5f5f5;
    color: #1a1a1a;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== CONTAINER ===== */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 30px;
}

/* ===== BACK LINK ===== */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #22c55e;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 40px;
    transition: opacity 0.3s ease;
}

.back-link:hover {
    opacity: 0.7;
}

.back-link svg {
    width: 16px;
    height: 16px;
}

/* ===== TYPOGRAPHY ===== */
h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -1px;
    color: #1a1a1a;
}

.subtitle {
    color: #999;
    font-size: 14px;
    margin-bottom: 50px;
}

h2 {
    font-size: 16px;
    font-weight: 700;
    color: #22c55e;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

p, li {
    font-size: 15px;
    color: #555;
    margin-bottom: 12px;
}

/* ===== LISTS ===== */
ul {
    list-style: none;
    padding-left: 0;
}

ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 10px;
}

ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #22c55e;
}

/* ===== SECTIONS ===== */
.section {
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid #e8e8e8;
}

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

/* ===== WARNING BOX ===== */
.warning-box {
    background: #fff5f5;
    border: 1px solid #fed7d7;
    border-radius: 12px;
    padding: 24px;
    margin: 24px 0;
}

.warning-box p {
    color: #4a4a4a;
    margin-bottom: 8px;
}

.warning-box p:last-child {
    margin-bottom: 0;
}

.warning-title {
    color: #e53e3e;
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

/* ===== NAVIGATION ===== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 24px 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(245, 245, 245, 0.95);
    backdrop-filter: blur(20px);
}

.logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #1a1a1a;
}

.logo span {
    color: #22c55e;
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    color: #666;
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: color 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links a:hover {
    color: #22c55e;
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 140px 100px 80px;
    background: #f5f5f5;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(34, 197, 94, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: 520px;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #1a1a1a;
    margin-bottom: 24px;
}

.hero-badge span {
    color: #666;
    font-weight: 400;
}

.hero h1 {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
    color: #1a1a1a;
}

.hero-desc {
    font-size: 16px;
    color: #888;
    margin-bottom: 36px;
    line-height: 1.7;
    max-width: 400px;
}

.hero-features {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: 2px solid #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: #1a1a1a;
}

.feature-text {
    font-size: 11px;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-image {
    position: relative;
    z-index: 2;
    max-width: 600px;
    flex-shrink: 0;
}

.hero-image img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 30px 60px rgba(0, 0, 0, 0.1));
}

/* ===== BUTTONS ===== */
.btn-primary {
    padding: 16px 56px;
    background: #1a1a1a;
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    background: #333;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.btn-telegram {
    width: 100%;
    padding: 18px;
    background: #0088cc;
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    letter-spacing: 0.5px;
}

.btn-telegram:hover {
    background: #0099e6;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(0, 136, 204, 0.25);
}

.btn-telegram:disabled {
    background: #ccc;
    color: #888;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ===== ABOUT SECTION ===== */
.about {
    padding: 100px 80px;
    background: #ffffff;
    text-align: center;
    position: relative;
}

.about h2 {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    color: #1a1a1a;
}

.about h2 span {
    color: #22c55e;
    font-weight: 400;
}

.about-divider {
    width: 40px;
    height: 2px;
    background: #e0e0e0;
    margin: 24px auto;
}

.about p {
    font-size: 15px;
    color: #999;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===== PRODUCT SECTION ===== */
.product {
    padding: 100px 80px;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 100px;
    min-height: 100vh;
}

.product-image {
    max-width: 500px;
    position: relative;
}

.product-image img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.08));
}

.product-info {
    max-width: 460px;
}

.product-info .badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #22c55e;
    margin-bottom: 20px;
}

.product-info h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -1px;
    color: #1a1a1a;
}

.product-info .subtitle {
    font-size: 16px;
    color: #888;
    margin-bottom: 36px;
}

.product-details {
    margin-bottom: 36px;
    background: #ffffff;
    border-radius: 12px;
    padding: 24px;
    border: 1px solid #eee;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 14px;
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    color: #999;
}

.detail-value {
    color: #1a1a1a;
    font-weight: 500;
}

.price {
    font-size: 42px;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 24px;
}

.price span {
    font-size: 16px;
    color: #999;
    font-weight: 400;
}

/* ===== AGREEMENT CHECKBOX ===== */
.agreement-box {
    background: #ffffff;
    border: 1px solid #e8e8e8;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
}

.agreement-box label {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    cursor: pointer;
}

.agreement-box input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    accent-color: #22c55e;
    cursor: pointer;
    flex-shrink: 0;
}

.agreement-box .agreement-text {
    font-size: 13px;
    color: #888;
    line-height: 1.6;
}

.agreement-box .agreement-text a {
    color: #22c55e;
    text-decoration: underline;
    font-weight: 500;
}

/* ===== FOOTER ===== */
footer {
    margin-top: 60px;
    padding: 40px 80px;
    background: #ffffff;
    border-top: 1px solid #e8e8e8;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #1a1a1a;
}

.footer-logo span {
    color: #22c55e;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: #999;
    text-decoration: none;
    font-size: 13px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #22c55e;
}

.footer-copy {
    color: #bbb;
    font-size: 13px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 140px 40px 60px;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero h1 {
        font-size: 38px;
    }

    .hero-features {
        justify-content: center;
    }

    .hero-image {
        margin-top: 50px;
        max-width: 400px;
    }

    .product {
        flex-direction: column;
        padding: 80px 40px;
        gap: 60px;
    }

    .about {
        padding: 80px 40px;
    }

    .about h2 {
        font-size: 28px;
    }

    nav {
        padding: 20px 30px;
    }

    .nav-links {
        display: none;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 40px 20px;
    }

    h1 {
        font-size: 24px;
    }

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

    .hero-features {
        flex-direction: row;
        justify-content: center;
    }

    .hero-image {
        max-width: 300px;
    }

    .product-info h2 {
        font-size: 26px;
    }

    .price {
        font-size: 32px;
    }

    footer {
        flex-direction: column;
        gap: 16px;
        text-align: center;
        padding: 30px 20px;
    }
}