:root {
    --primary-50: #f2f7fc;
    --primary-100: #e1ebf8;
    --primary-200: #caddf3;
    --primary-300: #a6c8ea;
    --primary-400: #7abdf0;
    --primary-500: #5c8dd5;
    --primary-600: #4874c8;
    --primary-700: #3e61b7;
    --primary-800: #385095;
    --primary-900: #314577;
    --primary-950: #1e2741;
    --primary: var(--primary-900);
    --dark: var(--primary-950);
    --accent: var(--primary-600);
    --light-bg: var(--primary-50);
    --white: #ffffff;
    --text-dark: var(--primary-950);
    --text-muted: #5a6a85;
    --border: var(--primary-200);
}
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    color: var(--text-dark);
    background: var(--light-bg);
    font-size: 15px;
    line-height: 1.6;
    font-family: "Inter";
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: transparent;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: all 0.3s ease;
}

nav.scrolled {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 50px;
    margin: 0px;
    object-fit: contain;
}

.cta-group {
    display: flex;
    align-items: center;
    gap: 20px;
    color: #000;
}

.nav-cta {
    background: var(--primary);
    color: white;
    padding: 10px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    transform: translateY(-1px);
}

/* ─── HERO ─── */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 0 10px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-weight: 600;
    font-size: 55px;
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero h1 .gradient-text {
    background: #4d6fb0;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    font-weight: 300;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 620px;
    margin: 0 auto 44px;
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero-cta-group {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.3s backwards;
}

.hero .btn {
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
    cursor: pointer;
    border: 1px solid var(--accent);
}

.hero .btn-primary {
    background: transparent;
    color: var(--btn-primary-text);
    animation: bounce 1.5s infinite;
}

.hero .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.35);
}

@keyframes bounce {
    0%,
    100% {
        transform: translateY(-25%);
        animation-timing-function: cubic-bezier(0.8, 0, 1, 1);
    }
    50% {
        transform: none;
        animation-timing-function: cubic-bezier(0, 0, 0.2, 1);
    }
}

/* ─── HOW TO USE ─── */
.how-to {
    padding: 100px 80px;
}

.how-to h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #111827;
}

.how-to .subtitle {
    text-align: center;
    color: #6b7280;
    font-size: 1rem;
    max-width: 680px;
    margin: 0 auto 60px;
    line-height: 1.8;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.step-card {
    padding: 28px;
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.step-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.08);
}

.step-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.step-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #111827;
}

.step-number {
    font-size: 1.4rem;
    font-weight: 700;
    color: #111827;
}

.step-card p {
    font-size: 0.9rem;
    color: #6b7280;
    line-height: 1.7;
}

/* ─── CTA BANNER ─── */
.cta-banner {
    background: var(--primary);
    padding: 80px;
    position: relative;
    overflow: hidden;
}

.cta-inner {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    max-width: 1100px;
    margin: auto;
}

.cta-content {
    max-width: 520px;
}

.cta-content h2 {
    color: #fff;
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 28px;
}

.btn-cta {
    background: #fff;
    color: var(--primary);
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    padding: 12px 26px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-cta:hover {
    transform: translateY(-2px);
    opacity: 0.95;
}

.cta-image img {
    width: 420px;
    max-width: 100%;
    height: auto;
    display: block;
}

/* ─── FAQ ─── */
.faq-section {
    padding: 100px 80px;
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 60px;
}

.faq-left h2 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.faq-left p {
    color: #6b7280;
    font-size: 0.95rem;
    margin-bottom: 24px;
    line-height: 1.7;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.custom-accordion {
    border-radius: 14px;
    background: #fff;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: 0.3s;
}

.custom-accordion:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
}

.custom-accordion .accordion-header {
    width: 100%;
    padding: 18px 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
}

.custom-accordion .bg-icon {
    padding: 6px 12px;
    background-color: #314777;
    color: #fff;
    border-radius: 8px;
}
.custom-accordion i {
    font-size: 0.9rem;
    transition: 0.3s;
}

.accordion-button:not(.collapsed) i,
.custom-accordion .accordion-header:not(.collapsed) i {
    transform: rotate(45deg);
}

.custom-accordion .accordion-body {
    padding: 0 22px 18px;
    font-size: 0.9rem;
    color: #6b7280;
    line-height: 1.7;
}

.accordion-button::after {
    display: none !important;
}

/* ─── FOOTER ─── */
footer {
    background: #f9fafb;
    border-top: 1px solid #e5e7eb;
    padding: 50px 80px 20px;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 30px;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.logo-group img {
    height: 42px;
    width: auto;
}

.footer-brand h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.footer-brand p {
    font-size: 0.85rem;
    color: #6b7280;
}

.footer-contact {
    text-align: right;
}

.footer-contact p {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 6px;
}

.social-links {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 10px;
}

.social-icon {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: #314577;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #fff;
}

.footer-bottom {
    text-align: center;
    font-size: 0.8rem;
    color: #6b7280;
    border-top: 1px solid #e5e7eb;
    padding-top: 16px;
}

/* ================= RESPONSIVE ================= */

/* ===== TABLET (≤ 992px) ===== */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 15px;
    }
    /* HOW TO */
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .how-to {
        padding: 80px 40px;
    }

    /* CTA */
    .cta-inner {
        flex-direction: column;
        text-align: center;
    }

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

    .cta-image img {
        width: 320px;
        margin-top: 20px;
    }

    /* FAQ */
    .faq-section {
        grid-template-columns: 1fr;
    }

    .faq-left {
        text-align: center;
    }
}

/* ===== MOBILE (≤ 768px) ===== */
@media (max-width: 768px) {
    /* FOOTER */
    .hero h1 {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 15px;
    }
    .footer {
        padding: 50px 0px 20px;
    }
    .footer-main {
        flex-direction: column;
        text-align: left;
    }

    .footer-contact {
        text-align: left;
    }

    .social-links {
        justify-content: left;
    }
}

/* ===== SMALL MOBILE (≤ 576px) ===== */
@media (max-width: 576px) {
    .hero h1 {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 15px;
    }
    .footer {
        padding: 50px 0px 20px;
    }
    /* HOW TO */
    .steps-grid {
        grid-template-columns: 1fr;
    }

    .how-to {
        padding: 60px 20px;
    }

    .how-to h2 {
        font-size: 2rem;
    }

    /* CTA */
    .cta-banner {
        padding: 60px 20px;
    }

    .cta-content h2 {
        font-size: 1.8rem;
    }

    /* FAQ */
    .faq-section {
        padding: 60px 20px;
    }
}