:root {
    /* BRAND COLORS */
    --primary: #0a3cff;      /* Biru utama */
    --primary-dark: #002d6f; /* Biru tua */
    --secondary: #ffcc00;
    --primary-footer: #161a53;    /* Kuning logo */

    /* NEUTRAL */
    --dark: #0b1220;
    --light: #f8fafc;
    --white: #ffffff;

    /* EFFECT */
    --glass: rgba(255,255,255,0.12);
    --shadow: 0 20px 40px rgba(0,0,0,0.15);
    --transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* NAVBAR */
#navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 18px 0;
    transition: var(--transition);

    /* NETRAL GELAP – AMAN UNTUK SEMUA LOGO */
    background: rgba(15, 23, 42, 0.65); /* slate / charcoal */
    backdrop-filter: blur(14px);
}

#navbar.scrolled {
    background: rgba(15, 23, 42, 0.85);
    box-shadow: 0 10px 30px rgba(0,0,0,0.35);
}


.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--primary);
}

.logo-icon {
    background: var(--primary);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 8px;
}

.logo-img {
    height: 42px;
    width: auto;
    object-fit: contain;
}
.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}
/* NAV LINKS WRAPPER */
.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
    list-style: none;
}

/* NAV LINK */
.nav-links a {
    position: relative;
    display: inline-flex;
    justify-content: center;

    padding: 6px 0;
    font-weight: 600;
    text-decoration: none;

    color: rgba(255,255,255,0.75);
    transition: color 0.3s ease;
}

/* UNDERLINE (SATU SUMBER SAJA) */
.nav-links a::after {
    content: "";
    position: absolute;

    left: 50%;
    bottom: -6px;

    width: 0;
    height: 2px;

    background: var(--secondary);
    border-radius: 2px;

    transform: translateX(-50%);
    transform-origin: center;

    opacity: 0;
    box-shadow: 0 0 8px rgba(255,204,0,0.6);

    transition:
        width 0.35s cubic-bezier(.4,0,.2,1),
        opacity 0.25s ease;
}

/* HOVER & ACTIVE (IDENTIK) */
.nav-links a:hover,
.nav-links a.active {
    color: var(--secondary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
    opacity: 1;
}


/* BUTTONS */
.btn {
    padding: 12px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    display: inline-block;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,86,179,0.3); }

.btn-yellow { background: var(--secondary); color: var(--dark); }
.btn-yellow:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(255,204,0,0.3); }

.btn-outline { border: 2px solid var(--white); color: var(--white); }
.btn-outline:hover { background: var(--white); color: var(--primary); }

/* HERO SECTION */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;

    background: linear-gradient(
        120deg,
        #002d6f,
        #0a3cff,
        #004ecb,
        #002d6f
    );
    background-size: 300% 300%;
    animation: gradientMove 18s ease infinite;
}

@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
.hero::after {
    content: "";
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,204,0,0.25), transparent 70%);
    top: -200px;
    right: -200px;
    filter: blur(80px);
}

.animated-bg {
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(255,204,0,0.1) 0%, transparent 70%);
    animation: move 15s infinite alternate;
}

@keyframes move {
    from { transform: translate(-10%, -10%); }
    to { transform: translate(10%, 10%); }
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-content h1 span { color: var(--secondary); }
.hero-content p { font-size: 1.2rem; max-width: 700px; margin: 0 auto 30px; opacity: 0.9; }

/* ABOUT SECTION */
.about { padding: 100px 0; background: var(--light); }
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { font-size: 2.5rem; }
.underline { width: 80px; height: 5px; background: var(--secondary); margin: 15px auto; border-radius: 5px; }

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.about-card {
    background: var(--white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.about-card:hover { transform: translateY(-10px); }
.about-card i { font-size: 3rem; margin-bottom: 20px; color: var(--primary); }

/* SERVICE SECTION */
.service { padding: 100px 0; }
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.service-item {
    padding: 30px;
    text-align: center;
    border: 1px solid #eee;
    border-radius: 15px;
    transition: var(--transition);
}

.service-item:hover { background: var(--primary); color: white; border-color: var(--primary); }
.service-item i { margin-bottom: 15px; width: 40px; height: 40px; }

/* PRICING */
.price-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 20px;
    margin: 30px 0;
}

/* SPEED */
.speed {
    background: linear-gradient(135deg, #0056b3, #003d80);
    color: white;
    padding: 25px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 15px 30px rgba(0,86,179,0.35);
}

.speed-value {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1;
}

.speed-unit {
    font-size: 1.7rem;
    opacity: 0.9;
    font-weight: 1000;
}
.duration {
    font-size: 1.6rem;   /* perbesar /Bulan */
    font-weight: 800;
}
/* PRICE */
.price {
    text-align: center;
    color: var(--primary);
}

.amount {
    font-size: 3.5rem;
    font-weight: 800;
}

.pricing { padding: 100px 0; background: var(--light); }
.pricing-container { display: flex; justify-content: center; }

.price-card {
    background: var(--white);
    padding: 50px;
    border-radius: 30px;
    width: 100%;
    max-width: 450px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border: 3px solid var(--primary);
}

.price-card h3 {
    text-align: center;
    font-weight: 700;
    margin-bottom: 15px;
}

/* CENTER BUTTON + TEXT */
.price-card .btn {
    display: flex;                 /* ⬅️ kunci */
    justify-content: center;       /* center horizontal */
    align-items: center;           /* center vertikal */

    margin: 0 auto;                /* center posisi tombol */
    text-align: center;

    width: fit-content;            /* ukuran pas isi */
    min-width: 260px;              /* biar terlihat premium */
}



.badge {
    position: absolute;
    top: -15px;
    right: 30px;
    background: var(--secondary);
    padding: 5px 20px;
    border-radius: 20px;
    font-weight: 800;
    font-size: 0.8rem;
}

.price { margin: 30px 0; font-weight: 800; color: var(--primary); }
.amount { font-size: 3.5rem; }
.features { list-style: none; margin-bottom: 30px; }
.features li { margin-bottom: 15px; display: flex; align-items: center; gap: 10px; }

/* WHATSAPP FLOAT */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: #25d366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    z-index: 2000;
    box-shadow: 0 10px 20px rgba(37,211,102,0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* FOOTER */
footer { background: var(--primary-footer); color: white; padding: 80px 0 30px; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

.footer-info h3 { margin-bottom: 20px; color: var(--secondary); }
.social-icons { display: flex; gap: 15px; margin-top: 20px; }
.social-icons a { color: white; transition: var(--transition); }
.social-icons a:hover { color: var(--secondary); transform: scale(1.2); }
.footer-links ul { list-style: none; }
.footer-links a { color: #ccc; text-decoration: none; transition: var(--transition); line-height: 2.5; }
.footer-links a:hover { color: var(--secondary); padding-left: 5px; }
.footer-bottom { border-top: 1px solid #333; padding-top: 30px; text-align: center; font-size: 0.9rem; color: #777; }
.footer-logo {
    height: 45px;
    margin-bottom: 20px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .nav-links, .nav-cta { display: none; }
    .hero-content h1 { font-size: 2.5rem; }
    .footer-grid { grid-template-columns: 1fr; }
    .price-grid {
        grid-template-columns: 1fr;
    }
}


.hero-content h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    color: white;
}

.hero-content h1 span {
    color: var(--secondary);
}

.hero-content p {
    max-width: 720px;
    margin: 25px auto 40px;
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.btn-primary {
    background: linear-gradient(135deg, #ffcc00, #ffd84d);
    color: #0b1220;
    font-weight: 800;
    padding: 14px 36px;
    box-shadow: 0 15px 30px rgba(255,204,0,0.45);
}

.btn-primary:hover {
    transform: translateY(-4px);
}

.btn-outline {
    border: 2px solid rgba(255,255,255,0.7);
    color: white;
}

#navbar.scrolled {
    background: rgba(2,6,23,0.7);
    backdrop-filter: blur(12px);
}

.section-title h2 {
    color: var(--primary-dark);
}

.price-card {
    border: none;
    background: linear-gradient(180deg, #ffffff, #f3f6ff);
}

.speed {
    background: linear-gradient(135deg, #0a3cff, #002d6f);
}


.nav-cta .btn-yellow {
    background: linear-gradient(135deg, #ffcc00, #ffd84d);
    color: #0b1220;
    font-weight: 800;
    box-shadow: 0 8px 20px rgba(255,204,0,0.35);
}

.logo-img {
    height: 42px;
    filter: drop-shadow(0 2px 6px rgba(0,0,0,0.35));
}