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

:root {
    --navy: #071A3D;
    --royal-blue: #0B4DB8;
    --bright-blue: #00AEEF;
    --white: #FFFFFF;
    --red: #E31B23;
    --gold: #FFC928;
    --light-bg: #F4F8FF;
    --dark-text: #0B1736;
    --muted-text: #64748B;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --container-max: 1200px;
    --header-height: 72px;
    --border-radius: 20px;
    --border-radius-sm: 12px;
    --shadow-sm: 0 4px 20px rgba(7, 26, 61, 0.08);
    --shadow-md: 0 8px 40px rgba(7, 26, 61, 0.12);
    --shadow-lg: 0 16px 60px rgba(7, 26, 61, 0.18);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--white);
    color: var(--dark-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-family);
    font-weight: 700;
    font-size: 16px;
    padding: 14px 32px;
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    min-height: 52px;
    min-width: 160px;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--royal-blue), var(--bright-blue));
    color: var(--white);
    box-shadow: 0 4px 16px rgba(11, 77, 184, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(11, 77, 184, 0.45);
}

.btn-primary:active {
    transform: scale(0.97);
}

.btn-hero {
    background: linear-gradient(135deg, var(--royal-blue), var(--bright-blue));
    color: var(--white);
    font-size: 20px;
    padding: 18px 48px;
    min-height: 60px;
    min-width: 200px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(11, 77, 184, 0.40);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn-hero::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--gold), var(--bright-blue));
    z-index: -1;
    opacity: 0;
    transition: var(--transition);
}

.btn-hero:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 40px rgba(11, 77, 184, 0.50);
}

.btn-hero:hover::before {
    opacity: 1;
}

.btn-hero:active {
    transform: scale(0.97);
}

.btn-small {
    font-size: 14px;
    padding: 10px 22px;
    min-height: 44px;
    min-width: 120px;
}

.btn-large {
    font-size: 18px;
    padding: 16px 40px;
    min-height: 56px;
    min-width: 180px;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(7, 26, 61, 0.06);
    height: var(--header-height);
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo-img {
    height: 36px;
    width: auto;
    user-select: none;
    -webkit-user-drag: none;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--dark-text);
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--royal-blue);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--royal-blue);
}

.nav-cta-mobile {
    display: none;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
}

.hamburger .bar {
    width: 26px;
    height: 3px;
    background: var(--dark-text);
    border-radius: 4px;
    transition: var(--transition);
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    padding: calc(var(--header-height) + 40px) 0 60px;
    background: linear-gradient(165deg, var(--light-bg) 0%, var(--white) 100%);
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--gold), #f5b800);
    color: var(--navy);
    font-weight: 700;
    font-size: 13px;
    padding: 6px 18px;
    border-radius: 100px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 20px;
    box-shadow: 0 4px 16px rgba(255, 201, 40, 0.30);
}

.hero-content {
    max-width: 620px;
}

.hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.hero-title .highlight-block {
    display: block;
    background: linear-gradient(135deg, var(--navy), var(--royal-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: clamp(40px, 6vw, 64px);
}

.hero-title .hero-sub-line {
    display: block;
    font-weight: 700;
    color: var(--dark-text);
    font-size: clamp(20px, 2.5vw, 30px);
    margin-top: 4px;
}

.hero-description {
    font-size: 18px;
    color: var(--muted-text);
    margin-bottom: 32px;
    max-width: 500px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 24px;
}

.hero-urgency {
    font-size: 14px;
    color: var(--muted-text);
    padding: 8px 16px;
    background: rgba(255, 201, 40, 0.12);
    border-radius: 100px;
    display: inline-block;
    border: 1px solid rgba(255, 201, 40, 0.20);
}

.hero-decoration {
    position: relative;
    height: 100%;
    min-height: 320px;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.10;
}

.shape-1 {
    width: 320px;
    height: 320px;
    background: var(--royal-blue);
    top: 10%;
    right: 0;
    animation: float 8s ease-in-out infinite;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: var(--gold);
    bottom: 10%;
    right: 20%;
    animation: float 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 120px;
    height: 120px;
    background: var(--bright-blue);
    top: 50%;
    right: 10%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(-20px, -30px) scale(1.05);
    }
}

/* ============================================
   GIVEAWAY SECTION
   ============================================ */
.giveaway-section {
    padding: 80px 0;
    background: var(--white);
    border-top: 1px solid rgba(7, 26, 61, 0.05);
}

.giveaway-grid {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.giveaway-icon-group {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.icon-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--light-bg);
    font-size: 28px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.icon-circle:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.giveaway-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.giveaway-text {
    font-size: 18px;
    color: var(--muted-text);
    margin-bottom: 32px;
    line-height: 1.8;
}

/* ============================================
   STEPS SECTION - DIPERBESAR
   ============================================ */
.steps-section {
    padding: 80px 0;
    background: var(--light-bg);
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-badge {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--royal-blue);
    background: rgba(11, 77, 184, 0.08);
    padding: 4px 16px;
    border-radius: 100px;
    margin-bottom: 10px;
}

.section-title {
    font-size: clamp(28px, 3.5vw, 40px);
    font-weight: 800;
    color: var(--navy);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.step-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px 24px 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(7, 26, 61, 0.04);
    position: relative;
}

.step-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.step-number {
    font-size: 56px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--navy), var(--royal-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

/* ===== GAMBAR DIPERBESAR ===== */
.step-image {
    width: 200px;
    height: 200px;
    margin: 0 auto 20px;
    border-radius: 20px;
    background: var(--light-bg);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 3px solid rgba(11, 77, 184, 0.15);
    box-shadow: 0 4px 16px rgba(7, 26, 61, 0.06);
    padding: 8px;
}

.step-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    user-select: none;
    -webkit-user-drag: none;
    transition: transform 0.3s ease;
}

.step-card:hover .step-image img {
    transform: scale(1.05);
}

.step-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--dark-text);
    margin-bottom: 4px;
}

.step-desc {
    font-size: 16px;
    color: var(--muted-text);
    line-height: 1.6;
    max-width: 280px;
    margin: 0 auto;
}

.steps-cta-wrapper {
    text-align: center;
}

/* ============================================
   FINAL CTA
   ============================================ */
.final-cta-section {
    padding: 80px 0;
    background: var(--white);
}

.final-cta-card {
    background: linear-gradient(135deg, var(--navy), var(--royal-blue));
    border-radius: var(--border-radius);
    padding: 56px 40px;
    text-align: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.final-cta-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
}

.final-cta-card::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255, 201, 40, 0.04);
}

.final-cta-title {
    font-size: clamp(28px, 3.5vw, 40px);
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.final-cta-text {
    font-size: 18px;
    opacity: 0.85;
    margin-bottom: 32px;
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
}

.final-cta-card .btn-hero {
    background: var(--gold);
    color: var(--navy);
    box-shadow: 0 8px 32px rgba(255, 201, 40, 0.35);
    position: relative;
    z-index: 1;
}

.final-cta-card .btn-hero:hover {
    box-shadow: 0 12px 40px rgba(255, 201, 40, 0.50);
    transform: translateY(-3px) scale(1.02);
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
    background: var(--navy);
    color: rgba(255, 255, 255, 0.8);
    padding: 48px 0 24px;
}

.footer-container {
    display: grid;
    gap: 28px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
}

.footer-logo {
    height: 42px;
    width: auto;
    user-select: none;
    -webkit-user-drag: none;
}

.footer-tagline {
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    opacity: 0.9;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 24px 32px;
}

.footer-link {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-link:hover {
    color: var(--gold);
}

.footer-disclaimer {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
    max-width: 800px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 20px;
}

.footer-copy {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 20px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

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

    .hero-description {
        max-width: 100%;
        margin-left: auto;
        margin-right: auto;
    }

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

    .hero-decoration {
        min-height: 180px;
    }

    .shape-1 {
        width: 200px;
        height: 200px;
    }

    .shape-2 {
        width: 140px;
        height: 140px;
    }

    .shape-3 {
        width: 80px;
        height: 80px;
    }

    .steps-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }

    .step-image {
        width: 180px;
        height: 180px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--white);
        padding: 20px 24px;
        box-shadow: var(--shadow-md);
        transform: translateY(-120%);
        opacity: 0;
        transition: var(--transition);
        border-bottom: 1px solid rgba(7, 26, 61, 0.05);
        z-index: 999;
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-list {
        flex-direction: column;
        gap: 16px;
        align-items: stretch;
    }

    .nav-cta-mobile {
        display: block;
        margin-top: 8px;
    }

    .nav-cta-mobile .btn {
        width: 100%;
        justify-content: center;
    }

    .hamburger {
        display: flex;
    }

    #header-cta-desktop {
        display: none;
    }

    .hero {
        padding: calc(var(--header-height) + 24px) 0 40px;
        min-height: auto;
    }

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

    .hero-title .highlight-block {
        font-size: 32px;
    }

    .hero-title .hero-sub-line {
        font-size: 18px;
    }

    .hero-description {
        font-size: 16px;
    }

    .btn-hero {
        font-size: 17px;
        padding: 16px 32px;
        min-height: 54px;
        min-width: 100%;
    }

    .btn-large {
        min-width: 100%;
        width: 100%;
    }

    .hero-decoration {
        display: none;
    }

    .steps-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .step-card {
        padding: 32px 20px 28px;
        max-width: 380px;
        margin: 0 auto;
    }

    .step-image {
        width: 180px;
        height: 180px;
    }

    .step-number {
        font-size: 48px;
    }

    .step-title {
        font-size: 20px;
    }

    .step-desc {
        font-size: 15px;
    }

    .giveaway-icon-group {
        gap: 12px;
    }

    .icon-circle {
        width: 52px;
        height: 52px;
        font-size: 22px;
    }

    .final-cta-card {
        padding: 36px 24px;
    }

    .footer-container {
        gap: 20px;
    }

    .footer-links {
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title .highlight-block {
        font-size: 28px;
    }

    .hero-title .hero-sub-line {
        font-size: 16px;
    }

    .btn {
        font-size: 15px;
        padding: 12px 24px;
        min-height: 48px;
    }

    .btn-hero {
        font-size: 16px;
        padding: 14px 24px;
        min-height: 50px;
    }

    .giveaway-title {
        font-size: 24px;
    }

    .step-card {
        padding: 24px 16px 20px;
    }

    .step-number {
        font-size: 40px;
    }

    .step-image {
        width: 150px;
        height: 150px;
    }

    .step-title {
        font-size: 18px;
    }

    .step-desc {
        font-size: 14px;
    }
}

/* ============================================
   ACCESSIBILITY & UTILITY
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

:focus-visible {
    outline: 3px solid var(--royal-blue);
    outline-offset: 2px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}