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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, Arial, sans-serif;
    color: #1f2937;
    background: #ffffff;
}

html {
    scroll-behavior: smooth;
}

/* ========================
   NAVBAR
======================== */
.navbar {
    height: 72px;
    padding: 0 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #eef0f4;
}

.logo {
    font-size: 22px;
    font-weight: 700;
}

.nav-center {
    display: flex;
    gap: 32px;
    list-style: none;
    color: #374151;
    font-weight: 500;
}

.btn-primary {
    background: #2563eb;
    color: #fff;
    border: none;
    padding: 12px 22px;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
}

.btn-primary.outline {
    background: #fff;
    color: #2563eb;
    border: 1px solid #c7d2fe;
}

/* ========================
   HERO LAYOUT
======================== */
.hero {
    max-width: 1200px;
    margin: 80px auto;
    display: grid;
    grid-template-columns: 1.3fr 0.9fr;
    gap: 80px;
}

/* ========================
   LEFT CONTENT
======================== */
.hero-left h1 {
    font-size: 44px;
    font-weight: 700;
    margin-bottom: 14px;
}

.hero-subtext {
    font-size: 16px;
    color: #6b7280;
    margin-bottom: 24px;
    max-width: 520px;
}

.rating {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
}

.rating-score {
    font-weight: 600;
}

.rating-reviews {
    color: #2563eb;
    font-weight: 500;
    cursor: pointer;
}

/* ========================
   TABS (CRITICAL)
======================== */
.hero-links {
    display: flex;
    gap: 28px;
    border-bottom: 1px solid #e5e7eb;
    margin-bottom: 28px;
}

.hero-links a {
    padding-bottom: 14px;
    font-weight: 500;
    color: #6b7280;
    cursor: pointer;
}

.hero-links a.active {
    color: #2563eb;
    border-bottom: 3px solid #2563eb;
}

/* ========================
   DESCRIPTION
======================== */
.hero-description h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.hero-description p {
    font-size: 15px;
    color: #374151;
    line-height: 1.7;
    max-width: 600px;
}

/* ========================
   PRICE CARD (IMPORTANT)
======================== */
.price-card {
    background: #fbfbfd;
    padding: 32px;
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.06);
}

.price-card h4 {
    font-size: 16px;
    color: #374151;
    margin-bottom: 20px;
}

.price {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 8px;
}

.currency {
    font-size: 22px;
    font-weight: 600;
}

.current {
    font-size: 36px;
    font-weight: 700;
}

.old-price {
    font-size: 14px;
    color: #9ca3af;
    margin-bottom: 22px;
}

.old-price span:first-child {
    text-decoration: line-through;
    margin-right: 8px;
}

.discount {
    color: #ef4444;
    font-weight: 600;
}

.btn-full {
    width: 100%;
    font-size: 16px;
    padding: 14px;
}
.dropdown-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.dropdown-menu li {
    list-style: none;
}

.itr-extensions {
    max-width: 1200px;
    margin: 0 auto 70px;
    padding: 0 10px;
}

.ext-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.ext-card {
    background: #fbfcff;
    border: 1px solid #e4ebf7;
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 20px;
}

.ext-card h3 {
    margin: 0 0 10px;
    color: #1e40af;
}

.ext-card ul {
    margin: 0 0 0 18px;
    color: #475569;
    line-height: 1.7;
}

.ext-card details {
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 10px 12px;
    margin-bottom: 10px;
    background: #fff;
}

.ext-card details summary {
    cursor: pointer;
    font-weight: 600;
    color: #334155;
}

.ext-card details p {
    margin: 8px 0 0;
    color: #64748b;
}

.ext-btn {
    display: inline-block;
    margin-top: 6px;
    text-decoration: none;
    color: #1d4ed8;
    font-weight: 600;
}

.timeline {
    display: grid;
    gap: 10px;
}

.timeline div {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #475569;
}

.timeline span {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #dbeafe;
    color: #1e3a8a;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
}

@media (max-width: 980px) {
    .navbar {
        padding: 0 20px;
    }

    .nav-center {
        display: none;
    }

    .hero {
        margin: 30px auto;
        padding: 0 20px;
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .hero-left h1 {
        font-size: 34px;
    }

    .hero-links {
        gap: 14px;
        flex-wrap: wrap;
    }

    .hero-description p {
        max-width: 100%;
    }

    .price-card {
        padding: 20px;
    }

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

    .itr-extensions {
        padding: 0 20px;
        margin-bottom: 40px;
    }
}

@media (max-width: 640px) {
    .logo {
        font-size: 19px;
    }

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

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

    .hero-links a {
        padding-bottom: 8px;
        font-size: 14px;
    }

    .price-card h4 {
        font-size: 15px;
    }

    .btn-primary,
    .btn-full {
        width: 100%;
        font-size: 15px;
        padding: 12px;
    }

    .timeline div {
        align-items: flex-start;
    }
}