:root {
    --primary-color: #1e3a8a;
    --secondary-color: #0f172a;
    --accent-color: #6495ed;
    --light-color: #f0f4ff;
    --text-color: #1e293b;
    --success-color: #10b981;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --fab-size: 90px;
}

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

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.5;
    color: var(--text-color);
    overflow-x: hidden;
    background-color: #ffffff;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.site-logo.responsive {
    width: 30vw;
    max-width: 50px;
    height: auto;
}

/* Top Bar */
.top-bar {
    background-color: rgba(255, 255, 255, 0.95);
    padding: 6px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 999;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.05);
    backdrop-filter: blur(10px);
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo i {
    margin-right: 8px;
    font-size: 1.5rem;
}

.contact-info {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: var(--text-color);
}

.contact-info span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.contact-info i {
    color: var(--accent-color);
}

/* Hero Section */
.hero {
    height: 85vh;
    min-height: 500px;
    position: relative;
    margin-top: 1px;
    overflow: hidden;
    z-index: 1;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 6, 21, 0.555), rgba(2, 16, 42, 0.055)),
        url("https://images.unsplash.com/photo-1480796927426-f609979314bd?q=80&w=870&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D") no-repeat center center/cover;
    will-change: transform;
    z-index: -1;
}

.hero-content {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    z-index: 2;
    padding: 0 15px;
    animation: fadeInUp 1s ease;
    text-shadow: 3px 3px 10px rgba(0, 0, 0, 0.811);
}

.hero-content-wrapper {
    max-width: 700px;
    position: relative;
    z-index: 10;
}

.hero-content h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    line-height: 1.2;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.btn {
    display: inline-block;
    padding: 10px 24px;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    text-decoration: none;
    border-radius: 45px;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    box-shadow: 0 3px 12px rgba(100, 149, 237, 0.3);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(100, 149, 237, 0.4);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid white;
    margin-left: 15px;
    box-shadow: none;
}

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

/* Section Styles */
section {
    padding: 60px 0;
    position: relative;
    z-index: 2;
    background-color: white;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}

.section-title h2 {
    font-size: 2.2rem;
    color: var(--primary-color);
    position: relative;
    display: inline-block;
    padding-bottom: 12px;
}

.section-title h2::after {
    content: "";
    position: absolute;
    width: 70px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.section-title p {
    margin-top: 12px;
    font-size: 1rem;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-color);
}

/* About Section */
.about {
    background-color: var(--light-color);
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-color);
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(30, 58, 138, 0.15);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.feature-card {
    text-align: center;
    padding: 25px;
    border-radius: 12px;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.08);
    background: white;
    border: 1px solid rgba(100, 149, 237, 0.1);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(30, 58, 138, 0.15);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 15px;
    background: linear-gradient(135deg, rgba(100, 149, 237, 0.1), rgba(30, 58, 138, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--accent-color);
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--primary-color);
}

/* Programs Section */
.programs {
    background-color: var(--light-color);
}

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

.tab-navigation {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    border-bottom: 2px solid rgba(100, 149, 237, 0.2);
    position: relative;
}

.tab-button {
    background: none;
    border: none;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.tab-button:hover {
    color: var(--primary-color);
}

.tab-button.active {
    color: var(--primary-color);
}

.tab-button.active::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

/* Sub-tab Styles untuk Online Tab */
.sub-tab-navigation {
    margin: 25px 0;
    padding: 15px;
    background: linear-gradient(135deg, rgba(100, 149, 237, 0.05), rgba(30, 58, 138, 0.05));
    border-radius: 12px;
    border: 1px solid rgba(100, 149, 237, 0.1);
}

.sub-tab-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.sub-tab-button {
    padding: 12px 25px;
    background: white;
    border: 2px solid rgba(100, 149, 237, 0.2);
    border-radius: 30px;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

.sub-tab-button:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(100, 149, 237, 0.15);
}

.sub-tab-button.active {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(100, 149, 237, 0.25);
}

.sub-tab-button i {
    font-size: 1rem;
}

.sub-tab-content-container {
    margin-top: 20px;
    animation: fadeIn 0.5s ease;
}

.sub-program-description {
    background: linear-gradient(135deg, rgba(100, 149, 237, 0.06), rgba(30, 58, 138, 0.06));
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 25px;
    border: 1px solid rgba(100, 149, 237, 0.12);
}

.sub-program-description h4 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sub-program-description h4 i {
    color: var(--accent-color);
}

.sub-program-description p {
    color: #555;
    line-height: 1.6;
    margin-bottom: 15px;
}

.sub-program-features ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 8px;
}

.sub-program-features li {
    padding: 5px 0;
    color: #555;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.sub-program-features li i {
    color: var(--success-color);
    font-size: 0.9rem;
}

.course-description {
    color: #666;
    font-size: 0.85rem;
    margin: 8px 0;
    font-style: italic;
}

/* Program Description Block */
.program-description-block {
    background: linear-gradient(135deg, rgba(100, 149, 237, 0.06), rgba(30, 58, 138, 0.06));
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 25px;
    border: 1px solid rgba(100, 149, 237, 0.12);
    box-shadow: 0 2px 12px rgba(30, 58, 138, 0.06);
}

.program-description-content {
    display: grid;
    grid-template-columns: 1fr 250px;
    gap: 25px;
    align-items: start;
}

.program-description-text {
    flex: 1;
}

.program-description-text h3 {
    font-size: 1.4rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.program-description-text h3 i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

.program-description-text p {
    color: #555;
    line-height: 1.5;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.program-benefits {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.program-benefits li {
    padding: 4px 0;
    color: #555;
    display: flex;
    align-items: flex-start;
    gap: 6px;
    font-size: 0.85rem;
}

.program-benefits li i {
    color: var(--success-color);
    margin-top: 2px;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.program-description-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.program-description-image img {
    width: 100%;
    max-width: 250px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(30, 58, 138, 0.12);
}

/* SIMPLIFIED PROGRAM CARDS INSIDE DESCRIPTION BLOCK */
.program-description-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.simple-program-card {
    background-color: white;
    border-radius: 8px;
    padding: 16px;
    box-shadow: 0 2px 8px rgba(30, 58, 138, 0.08);
    transition: var(--transition);
    border: 1px solid rgba(100, 149, 237, 0.1);
    display: flex;
    flex-direction: column;
}

.simple-program-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.15);
    border-color: var(--accent-color);
}

.simple-program-header {
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(100, 149, 237, 0.1);
}

.simple-program-header h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.simple-program-header .program-type {
    color: var(--accent-color);
    font-size: 0.8rem;
    font-weight: 600;
}

.simple-program-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    color: #666;
    font-size: 0.8rem;
}

.simple-program-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.simple-program-meta i {
    color: var(--accent-color);
    font-size: 0.9rem;
}

.simple-program-features {
    margin-bottom: 15px;
    flex: 1;
}

.simple-program-features ul {
    list-style: none;
    padding-left: 0;
}

.simple-program-features li {
    padding: 3px 0;
    color: #555;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    line-height: 1.4;
}

.simple-program-features li i {
    color: var(--success-color);
    margin-right: 6px;
    font-size: 0.7rem;
    flex-shrink: 0;
}

.simple-program-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.simple-program-price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-color);
}

.simple-program-price .period {
    font-size: 0.8rem;
    font-weight: normal;
    color: #666;
    display: block;
}

.simple-program-btn {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.simple-program-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(100, 149, 237, 0.3);
}

/* Testimonials Section */
.testimonials {
    background-color: white;
}

.testimonial-slider {
    position: relative;
    overflow: hidden;
    max-width: 700px;
    margin: 0 auto;
}

.testimonial-container {
    display: flex;
    transition: transform 0.5s ease;
}

.testimonial-card {
    min-width: 100%;
    padding: 0 20px;
    text-align: center;
}

.testimonial-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    margin: 0 auto 15px;
    overflow: hidden;
    border: 3px solid var(--accent-color);
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-content {
    font-style: italic;
    font-size: 1rem;
    margin-bottom: 15px;
    color: #555;
    line-height: 1.7;
}

.testimonial-author {
    font-weight: 600;
    color: var(--primary-color);
}

.testimonial-author span {
    display: block;
    font-weight: normal;
    color: #777;
    font-size: 0.9rem;
}

.slider-controls {
    display: flex;
    justify-content: center;
    margin-top: 25px;
    gap: 10px;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: #ddd;
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background-color: var(--accent-color);
    transform: scale(1.2);
}

/* Instructors Section */
.instructors {
    background-color: var(--light-color);
}

.instructor-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 25px;
}

.instructor-card {
    background-color: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.08);
    transition: var(--transition);
    text-align: center;
    border: 1px solid rgba(100, 149, 237, 0.1);
}

.instructor-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(30, 58, 138, 0.15);
}

.instructor-image {
    height: 220px;
    overflow: hidden;
}

.instructor-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.instructor-card:hover .instructor-image img {
    transform: scale(1.1);
}

.instructor-content {
    padding: 15px;
}

.instructor-content h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    color: var(--primary-color);
}

.instructor-content p {
    color: #777;
    margin-bottom: 12px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 8px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, rgba(100, 149, 237, 0.1), rgba(30, 58, 138, 0.1));
    color: var(--accent-color);
    border-radius: 50%;
    transition: var(--transition);
}

.social-links a:hover {
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    transform: scale(1.1);
}

/* CTA Section */
.cta {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.95), rgba(100, 149, 237, 0.95)),
        url("https://plus.unsplash.com/premium_photo-1716396589180-0a7050c21098?q=80&w=1032&auto=format&fit=crop&ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D") no-repeat center center/cover;
    color: white;
    text-align: center;
}

.cta-content {
    max-width: 650px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.cta-content p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
}

/* Footer */
footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 50px 0 15px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
}

.footer-column h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    position: relative;
    padding-bottom: 8px;
    color: var(--accent-color);
}

.footer-column h3::after {
    content: "";
    position: absolute;
    width: 35px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
    bottom: 0;
    left: 0;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 8px;
}

.footer-column ul li a {
    color: #bbb;
    text-decoration: none;
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 15px;
    border-top: 1px solid #444;
    font-size: 0.85rem;
    color: #bbb;
}

/* Notification Toast */
.toast {
    position: fixed;
    bottom: 80px;
    right: 20px;
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1001;
    display: flex;
    align-items: center;
    gap: 8px;
}

.toast.show {
    transform: translateX(0);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 2.4rem;
    }

    .about-content {
        flex-direction: column;
    }

    .about-text {
        order: 2;
    }

    .about-image {
        order: 1;
    }

    .program-description-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .program-description-image {
        display: none;
    }

    .contact-info {
        display: none;
    }

    .program-description-cards {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .sub-program-features ul {
        grid-template-columns: 1fr;
    }

    section {
        padding: 50px 0;
    }
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }

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

    .btn-outline {
        display: block;
        margin-left: 0;
        margin-top: 15px;
    }

    .tab-navigation {
        flex-wrap: wrap;
        gap: 8px;
        border-bottom: none;
    }

    .tab-button {
        flex: 1;
        min-width: 90px;
        border: 1px solid rgba(100, 149, 237, 0.2);
        border-radius: 20px;
        margin-bottom: 8px;
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    .tab-button.active::after {
        display: none;
    }

    .tab-button.active {
        background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
        color: white;
    }

    .program-description-block {
        padding: 15px;
        margin-bottom: 20px;
    }

    .program-benefits {
        grid-template-columns: 1fr;
    }

    section {
        padding: 50px 0;
    }

    .program-description-cards {
        grid-template-columns: 1fr;
    }

    .sub-tab-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .sub-tab-button {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 1.7rem;
    }

    .hero-content p {
        font-size: 0.95rem;
    }

    section {
        padding: 40px 0;
    }

    .top-bar {
        padding: 8px 0;
    }

    .logo {
        font-size: 1.1rem;
    }

    .logo i {
        font-size: 1.3rem;
    }

    .program-description-text h3 {
        font-size: 1.2rem;
    }

    .program-description-text p {
        font-size: 0.85rem;
    }

    .program-benefits li {
        font-size: 0.8rem;
    }

    .simple-program-footer {
        flex-direction: column;
        gap: 10px;
        align-items: flex-start;
    }

    .simple-program-btn {
        width: 100%;
        text-align: center;
    }

    .sub-tab-button {
        padding: 10px 15px;
        font-size: 0.85rem;
    }
}