:root {
    --primary: #0B86C9;
    --primary-dark: #0A5E98;
    --secondary: #4FA9DA;
    --dark: #123D63;
    --dark-soft: #214A66;
    --light: #f4f8fb;
    --text: #1c2d3b;
    --muted: #6b7a88;
    --white: #ffffff;
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 20px 60px rgba(10, 50, 80, 0.18);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 16px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    background: #eef5fb;
    font-family: "Inter", "Segoe UI", sans-serif;
}

.guest-header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 30;
    padding: 18px 0 0 0;
}

.guest-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.brand-wrap {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-logo {
    width: 58px;
    height: 58px;
    object-fit: contain;
    border-radius: 14px;
    background: rgba(255,255,255,0.08);
    padding: 6px;
    backdrop-filter: blur(10px);
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    color: #fff;
    font-weight: 800;
    font-size: 1.2rem;
    line-height: 1;
}

.brand-subtitle {
    color: rgba(255,255,255,0.75);
    font-size: 0.86rem;
    margin-top: 4px;
}

.nav-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.btn-nav {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border-radius: 999px;
    font-weight: 700;
    text-decoration: none;
    transition: 0.3s ease;
}

.btn-nav-outline {
    color: #fff;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(10px);
}

.btn-nav-outline:hover {
    color: #fff;
    background: rgba(255,255,255,0.12);
}

.btn-nav-primary {
    color: #fff;
    background: linear-gradient(135deg, #0B86C9, #137FC0, #0A5E98);
    box-shadow: 0 14px 30px rgba(11, 134, 201, 0.28);
}

.btn-nav-primary:hover {
    color: #fff;
    transform: translateY(-2px);
}

.hero-section {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at top left, rgba(79,169,218,0.20), transparent 30%),
        radial-gradient(circle at bottom right, rgba(11,134,201,0.22), transparent 30%),
        linear-gradient(135deg, #123D63 0%, #214A66 45%, #0B86C9 100%);
    color: #fff;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(rgba(3, 10, 20, 0.45), rgba(3, 10, 20, 0.45)),
        url("../images/banner-gano.webp") center center / cover no-repeat;
    opacity: 0.20;
}

.hero-title {
    font-size: clamp(2.4rem, 5vw, 4.8rem);
    line-height: 1.04;
    font-weight: 900;
    margin-bottom: 22px;
    max-width: 900px;
}

.hero-title span {
    color: #8ad7ff;
}

.hero-description {
    font-size: 1.12rem;
    line-height: 1.75;
    color: rgba(255,255,255,0.84);
    max-width: 720px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 10px 16px;
    border-radius: 999px;
    background: rgba(255,255,255,0.10);
    border: 1px solid rgba(255,255,255,0.12);
    backdrop-filter: blur(14px);
    font-size: 0.94rem;
    font-weight: 700;
    margin-top: 50px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 30px;
}

.btn-hero {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 0 24px;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 800;
    transition: 0.3s ease;
}

.btn-hero-primary {
    color: #fff;
    background: linear-gradient(135deg, #0B86C9, #137FC0, #0A5E98);
    box-shadow: 0 16px 34px rgba(11,134,201,0.25);
}

.btn-hero-primary:hover {
    color: #fff;
    transform: translateY(-2px);
}

.btn-hero-secondary {
    color: #fff;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.07);
    backdrop-filter: blur(10px);
}

.btn-hero-secondary:hover {
    color: #fff;
    background: rgba(255,255,255,0.13);
}

.hero-metrics {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 34px;
}

.metric-card {
    min-width: 150px;
    padding: 18px 20px;
    border-radius: 18px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    backdrop-filter: blur(14px);
}

.metric-card strong {
    display: block;
    font-size: 1.6rem;
    font-weight: 900;
    color: #fff;
}

.metric-card span {
    display: block;
    color: rgba(255,255,255,0.76);
    margin-top: 4px;
    font-size: 0.95rem;
}

.hero-panel {
    background: linear-gradient(180deg, rgba(18,61,99,0.88), rgba(33,74,102,0.88));
    border: 1px solid rgba(255,255,255,0.10);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
    overflow: hidden;
}

.hero-panel-top {
    display: flex;
    gap: 8px;
    padding: 18px 22px;
    border-bottom: 1px solid rgba(255,255,255,0.10);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.45);
}

.hero-panel-body {
    padding: 26px;
}

.hero-panel-body h3 {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 22px;
}

.hero-feature-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.hero-feature-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.hero-feature-item i {
    font-size: 1.2rem;
    color: #4FA9DA;
    margin-top: 4px;
}

.hero-feature-item strong {
    display: block;
    font-size: 1rem;
    margin-bottom: 4px;
}

.hero-feature-item p {
    margin: 0;
    color: rgba(255,255,255,0.76);
    line-height: 1.55;
    font-size: 0.95rem;
}

.hero-wave {
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 100%;
    height: 90px;
    background: linear-gradient(to top, #f7fbff, transparent);
}

.section-block {
    padding: 90px 0;
}

.section-light {
    background: var(--light);
}

.section-dark {
    background:
        radial-gradient(circle at top right, rgba(0,180,216,0.12), transparent 25%),
        linear-gradient(180deg, var(--dark) 0%, var(--dark-soft) 100%);
    color: #fff;
}

.section-heading {
    max-width: 850px;
    margin: 0 auto 20px auto;
}

.section-heading h2 {
    font-size: clamp(2rem, 3vw, 3rem);
    font-weight: 900;
    margin-bottom: 18px;
}

.section-heading p {
    color: var(--muted);
    font-size: 1.06rem;
    line-height: 1.8;
}

.heading-light p {
    color: rgba(255,255,255,0.74);
}

.section-tag {
    display: inline-flex;
    padding: 9px 14px;
    border-radius: 999px;
    background: rgba(0,119,182,0.08);
    color: var(--primary);
    font-size: 0.88rem;
    font-weight: 800;
    letter-spacing: 0.3px;
    margin-bottom: 16px;
}

.section-tag-light {
    background: rgba(255,255,255,0.14);
    color: #fff;
}

.benefit-card {
    height: 100%;
    background: #fff;
    border-radius: 22px;
    padding: 28px 24px;
    box-shadow: 0 16px 40px rgba(3, 31, 61, 0.08);
    transition: 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-6px);
}

.benefit-icon {
    width: 62px;
    height: 62px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0,180,216,0.14), rgba(0,119,182,0.14));
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: 18px;
}

.benefit-card h4 {
    font-size: 1.16rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.benefit-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}

.topic-box {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    height: 100%;
    padding: 24px;
    border-radius: 20px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08);
}

.topic-box i {
    font-size: 1.4rem;
    color: #4FA9DA;
    margin-top: 2px;
}

.topic-box h5 {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.topic-box p {
    margin: 0;
    color: rgba(255,255,255,0.75);
    line-height: 1.65;
}

.lesson-card {
    height: 100%;
    overflow: hidden;
    border-radius: 24px;
    background: #ffffff;
    border: 1px solid rgba(11, 134, 201, 0.10);
    box-shadow: 0 18px 45px rgba(18, 61, 99, 0.10);
    transition: 0.35s ease;
}

.lesson-card:hover {
    transform: translateY(-8px);
}

.lesson-image-wrap {
    position: relative;
    display: block;
    height: 235px;
    overflow: hidden;
}

.lesson-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.lesson-card:hover .lesson-image {
    transform: scale(1.06);
}

.lesson-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    background: #0B86C9;
    color: #fff;
    font-size: 0.84rem;
    font-weight: 800;
    box-shadow: 0 10px 20px rgba(11,134,201,0.20);
}

.lesson-content {
    padding: 24px;
}

.lesson-meta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 14px;
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 600;
}

.lesson-content h3 {
    font-size: 1.22rem;
    line-height: 1.35;
    font-weight: 800;
    margin-bottom: 12px;
}

.lesson-content h3 a {
    color: var(--text);
    text-decoration: none;
}

.lesson-content p {
    color: var(--muted);
    line-height: 1.75;
    margin-bottom: 20px;
}

.lesson-btn {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    font-weight: 800;
    color: #0B86C9;
}

.lesson-btn:hover {
    color: var(--primary-dark);
}

.cta-section {
    background: linear-gradient(135deg, #123D63 0%, #0A5E98 55%, #0B86C9 100%);
}

.cta-box {
    border-radius: 30px;
    padding: 44px;
    color: #fff;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow);
}

.cta-box h2 {
    font-size: clamp(2rem, 3vw, 3rem);
    font-weight: 900;
    margin: 14px 0 16px 0;
}

.cta-box p {
    color: rgba(255,255,255,0.84);
    line-height: 1.8;
    margin: 0;
}

.cta-actions {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 0 24px;
    border-radius: 999px;
    font-weight: 800;
    text-decoration: none;
    transition: 0.3s ease;
}

.btn-cta-light {
    background: #fff;
    color: var(--primary-dark);
}

.btn-cta-light:hover {
    color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-cta-outline {
    color: #fff;
    border: 1px solid rgba(255,255,255,0.25);
    background: rgba(255,255,255,0.06);
}

.btn-cta-outline:hover {
    color: #fff;
    background: rgba(255,255,255,0.12);
}

@media (max-width: 991px) {
    .guest-header {
        position: relative;
        background: #07111f;
    }

    .guest-nav {
        flex-direction: column;
        align-items: flex-start;
    }

    .nav-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .hero-section .min-vh-100 {
        min-height: auto !important;
    }

    .hero-title {
        margin-top: 20px;
    }

    .cta-box {
        padding: 30px 24px;
    }
}

@media (max-width: 767px) {
    .section-block {
        padding: 70px 0;
    }

    .hero-actions,
    .hero-metrics {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-hero,
    .btn-nav,
    .btn-cta {
        width: 100%;
    }

    .lesson-image-wrap {
        height: 210px;
    }

    .hero-panel-body,
    .lesson-content,
    .benefit-card,
    .topic-box {
        padding: 20px;
    }
}