/* ===== BASE & RESET ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #f8faff;
    color: #1a2b3c;
    line-height: 1.7;
    scroll-behavior: smooth;
}
a {
    text-decoration: none;
    color: inherit;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ===== NAVIGATION ===== */
.navbar-main {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1050;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(74, 158, 255, 0.15);
    padding: 0.6rem 0;
    transition: box-shadow 0.3s;
}
.navbar-main.scrolled {
    box-shadow: 0 8px 30px rgba(0, 20, 40, 0.08);
}
.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-brand {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: #0b2b44;
}
.nav-brand span {
    color: #4a9eff;
}
.nav-menu {
    list-style: none;
    display: flex;
    gap: 0.2rem;
    margin: 0;
    padding: 0;
    align-items: center;
    flex-wrap: wrap;
}
.nav-menu li {
    display: inline-block;
}
.nav-menu li a {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-weight: 500;
    font-size: 0.95rem;
    color: #1a3b5c;
    border-radius: 30px;
    transition: all 0.2s;
}
.nav-menu li a:hover,
.nav-menu li a:focus {
    background: rgba(74, 158, 255, 0.12);
    color: #1a6bb0;
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
}
.nav-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background: #1a3b5c;
    border-radius: 3px;
    transition: all 0.25s;
}

/* ===== HERO ===== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0b2b44 0%, #1f5a7a 100%);
    overflow: hidden;
    padding-top: 80px;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 70% 30%, rgba(74, 158, 255, 0.2) 0%, transparent 70%);
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: 2;
}
.hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(4px);
    padding: 0.3rem 1.2rem;
    border-radius: 40px;
    font-size: 0.85rem;
    letter-spacing: 1px;
    color: #b3daff;
    margin-bottom: 1.5rem;
}
.hero-title {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.2rem;
}
.hero-title .highlight {
    background: linear-gradient(135deg, #8ac4ff, #4a9eff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: 1.25rem;
    max-width: 580px;
    opacity: 0.85;
    margin-bottom: 2rem;
}
.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.hero-image {
    border-radius: 24px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}
.hero-scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
}
.hero-scroll-indicator a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.6);
}
.hero-scroll-indicator span {
    display: block;
    width: 6px;
    height: 6px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: bounce-dot 1.4s infinite;
}
.hero-scroll-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}
.hero-scroll-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}
@keyframes bounce-dot {
    0%, 100% { transform: translateY(0); opacity: 0.3; }
    50% { transform: translateY(-10px); opacity: 1; }
}

/* ===== SECTION COMMON ===== */
section {
    padding: 5rem 0;
}
.section-tag {
    display: inline-block;
    background: rgba(74, 158, 255, 0.10);
    color: #1a6bb0;
    font-weight: 600;
    font-size: 0.8rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    padding: 0.2rem 1rem;
    border-radius: 30px;
    margin-bottom: 0.8rem;
}
.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: #0b2b44;
    margin-bottom: 0.5rem;
}
.section-subtitle {
    font-size: 1.15rem;
    color: #3d5a78;
    max-width: 700px;
}

/* ===== ABOUT ===== */
.section-about {
    background: #ffffff;
}
.about-text p {
    font-size: 1.05rem;
    color: #1f3b54;
    margin-bottom: 1rem;
}
.about-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    min-height: 320px;
}
.stat-box {
    background: #f0f7ff;
    padding: 1.2rem 0.5rem;
    border-radius: 16px;
    text-align: center;
}
.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #0b2b44;
}
.stat-label {
    font-size: 0.85rem;
    color: #3d5a78;
}

/* ===== BENEFITS ===== */
.section-benefits {
    background: #f8faff;
}
.benefit-card {
    background: #ffffff;
    padding: 2rem 1.8rem;
    border-radius: 24px;
    box-shadow: 0 4px 20px rgba(0, 30, 60, 0.04);
    transition: all 0.25s;
    height: 100%;
    border: 1px solid rgba(74, 158, 255, 0.06);
}
.benefit-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(74, 158, 255, 0.12);
}
.benefit-icon {
    font-size: 2.6rem;
    margin-bottom: 0.8rem;
}
.benefit-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #0b2b44;
    margin-bottom: 0.6rem;
}
.benefit-card p {
    color: #3d5a78;
    font-size: 0.98rem;
}

/* ===== VITAMIN C ===== */
.section-vitamin-c {
    background: linear-gradient(135deg, #eef6ff 0%, #ffffff 100%);
}
.vitamin-text p {
    font-size: 1.05rem;
    color: #1f3b54;
    margin-bottom: 1rem;
}
.vitamin-facts {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}
.fact-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1rem;
}
.fact-icon {
    color: #4a9eff;
    font-weight: 700;
    font-size: 1.2rem;
}
.vitamin-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    min-height: 300px;
}

/* ===== LEVELS ===== */
.section-levels {
    background: #ffffff;
}
.level-card {
    background: #f8faff;
    padding: 2rem 1.8rem;
    border-radius: 24px;
    border-left: 4px solid #4a9eff;
    height: 100%;
    transition: background 0.2s;
}
.level-card:hover {
    background: #eef6ff;
}
.level-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: #4a9eff;
    opacity: 0.5;
    margin-bottom: 0.4rem;
}
.level-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #0b2b44;
    margin-bottom: 0.5rem;
}
.level-card p {
    color: #3d5a78;
    font-size: 0.98rem;
}

/* ===== TYPES ===== */
.section-types {
    background: #f8faff;
}
.type-card {
    background: #ffffff;
    padding: 2rem 1.8rem;
    border-radius: 24px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
    height: 100%;
    transition: all 0.2s;
    border: 1px solid rgba(74, 158, 255, 0.08);
}
.type-card:hover {
    border-color: #4a9eff;
}
.type-badge {
    display: inline-block;
    background: #4a9eff;
    color: #fff;
    font-weight: 600;
    font-size: 0.75rem;
    padding: 0.2rem 1rem;
    border-radius: 30px;
    margin-bottom: 0.6rem;
    letter-spacing: 0.5px;
}
.type-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #0b2b44;
    margin-bottom: 0.5rem;
}
.type-card p {
    color: #3d5a78;
    font-size: 0.98rem;
}

/* ===== FAQ ===== */
.section-faq {
    background: #ffffff;
}
.accordion-item {
    border: 1px solid rgba(74, 158, 255, 0.12);
    border-radius: 16px !important;
    margin-bottom: 0.8rem;
    overflow: hidden;
}
.accordion-button {
    font-weight: 600;
    color: #0b2b44;
    background: #f8faff;
    padding: 1.2rem 1.5rem;
}
.accordion-button:not(.collapsed) {
    background: #eef6ff;
    color: #1a6bb0;
    box-shadow: none;
}
.accordion-body {
    padding: 1.2rem 1.5rem;
    color: #1f3b54;
    background: #ffffff;
}

/* ===== CONTACT ===== */
.section-contact {
    background: #f8faff;
}
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.contact-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.05rem;
    color: #1f3b54;
}
.contact-icon {
    font-size: 1.4rem;
}
.contact-form .form-control {
    border-radius: 16px;
    border: 1px solid rgba(74, 158, 255, 0.15);
    padding: 0.8rem 1.2rem;
    background: #ffffff;
}
.contact-form .form-control:focus {
    border-color: #4a9eff;
    box-shadow: 0 0 0 4px rgba(74, 158, 255, 0.1);
}
.btn-primary {
    background: #4a9eff;
    border: none;
    border-radius: 40px;
    padding: 0.7rem 2.2rem;
    font-weight: 600;
    transition: all 0.25s;
}
.btn-primary:hover {
    background: #1a6bb0;
    transform: scale(1.02);
}
.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.4);
    border-radius: 40px;
    padding: 0.7rem 2.2rem;
}
.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #ffffff;
}

/* ===== FOOTER ===== */
.site-footer {
    background: #0b2b44;
    color: rgba(255, 255, 255, 0.75);
    padding: 4rem 0 2rem;
}
.footer-brand {
    font-size: 1.8rem;
    font-weight: 700;
    color: #ffffff;
}
.footer-brand span {
    color: #4a9eff;
}
.footer-description {
    margin-top: 0.8rem;
    font-size: 0.98rem;
    max-width: 300px;
}
.site-footer h4 {
    color: #ffffff;
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-links li {
    margin-bottom: 0.5rem;
}
.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    transition: color 0.2s;
}
.footer-links a:hover {
    color: #ffffff;
}
.social-links {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}
.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    transition: all 0.25s;
}
.social-link:hover {
    background: #4a9eff;
    color: #ffffff;
    transform: translateY(-3px);
}
.footer-copy {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 0.5rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
    .hero-title {
        font-size: 2.8rem;
    }
    .section-title {
        font-size: 2.2rem;
    }
}
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        background: #ffffff;
        padding: 1rem 0;
        border-top: 1px solid rgba(0,0,0,0.05);
        margin-top: 0.8rem;
    }
    .nav-menu.active {
        display: flex;
    }
    .nav-toggle {
        display: flex;
    }
    .nav-container {
        flex-wrap: wrap;
    }
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-buttons .btn {
        width: 100%;
        text-align: center;
    }
    .section-title {
        font-size: 1.8rem;
    }
    section {
        padding: 3rem 0;
    }
    .stat-number {
        font-size: 1.4rem;
    }
}