/* ==========================================================================
   LANGNET LANDING PAGE STYLE SYSTEM
   Theme: White & Dark Green (Clean Light Mode)
   ========================================================================== */

/* 1. Global Reset & Variables */
:root {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-light: #94A3B8;
    
    /* Green Accents */
    --color-primary-dark: #064E3B; /* Deep Forest Green */
    --color-primary: #14532D;      /* Dark Green */
    --color-accent: #10B981;       /* Emerald Green */
    --color-accent-light: #E6F4EA; /* Very light mint */
    
    --shadow-sm: 0 2px 4px rgba(6, 78, 59, 0.02);
    --shadow-md: 0 10px 30px rgba(6, 78, 59, 0.04), 0 1px 3px rgba(6, 78, 59, 0.02);
    --shadow-lg: 0 20px 40px rgba(6, 78, 59, 0.06), 0 1px 10px rgba(0, 0, 0, 0.02);
    
    --border-color: #E2E8F0;
    --border-accent: rgba(16, 185, 129, 0.2);
    
    --font-main: 'Plus Jakarta Sans', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 2. Typography & Text Utilities */
h1, h2, h3, h4 {
    font-weight: 700;
    color: var(--color-primary-dark);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.highlight {
    color: var(--color-accent);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 3. Navigation Bar (Header) */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--color-primary-dark);
}

.logo-icon {
    font-size: 24px;
    color: var(--color-accent);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
}

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

.nav-link:hover, .nav-link.active {
    color: var(--color-primary-dark);
}

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

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

.btn-hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    color: var(--color-primary-dark);
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 700;
    border-radius: 99px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background-color: var(--color-primary-dark);
    color: white;
    box-shadow: 0 4px 14px rgba(6, 78, 59, 0.2);
}

.btn-primary:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
}

.btn-secondary {
    background-color: var(--color-accent-light);
    color: var(--color-primary-dark);
}

.btn-secondary:hover {
    background-color: var(--color-accent);
    color: white;
    transform: translateY(-2px);
}

.btn-login-portal {
    background-color: var(--color-primary-dark);
    color: white;
    font-size: 13px;
    padding: 10px 20px;
    border: 1.5px solid var(--color-primary-dark);
}

.btn-login-portal:hover {
    background-color: transparent;
    color: var(--color-primary-dark);
}

/* 4. Hero Section */
.hero-section {
    position: relative;
    padding-top: 160px;
    padding-bottom: 120px;
    background-color: var(--bg-secondary);
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.badge-promo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background-color: var(--color-accent-light);
    color: var(--color-primary-dark);
    font-size: 12px;
    font-weight: 700;
    border-radius: 99px;
    margin-bottom: 20px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

.hero-title {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 24px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 24px;
    font-weight: 800;
    color: var(--color-primary-dark);
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 32px;
    background-color: var(--border-color);
}

.hero-image-wrapper {
    display: flex;
    justify-content: center;
    position: relative;
}

.hero-image-card {
    background: white;
    padding: 12px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    position: relative;
    max-width: 440px;
    transform: rotate(2deg);
    transition: var(--transition);
}

.hero-image-card:hover {
    transform: rotate(0deg) scale(1.02);
}

.hero-img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    display: block;
}

.image-overlay-card {
    position: absolute;
    bottom: -20px;
    left: -20px;
    background-color: white;
    padding: 14px 20px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(6, 78, 59, 0.08);
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid var(--border-color);
}

.icon-bolt {
    font-size: 20px;
    color: var(--color-accent);
    background-color: var(--color-accent-light);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.image-overlay-card h4 {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 2px;
}

.image-overlay-card p {
    font-size: 11px;
    color: var(--text-secondary);
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    transform: rotate(180deg);
}

.hero-wave svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 45px;
}

.hero-wave .shape-fill {
    fill: #FFFFFF;
}

/* 5. Section General Headers */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px auto;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.section-title {
    font-size: 36px;
    margin-bottom: 16px;
    line-height: 1.25;
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
}

/* 6. Features Section */
.features-section {
    padding: 100px 0;
    background-color: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    transition: var(--transition);
}

.feature-card:hover {
    background-color: white;
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.feature-icon-wrapper {
    font-size: 28px;
    color: var(--color-primary-dark);
    margin-bottom: 20px;
    background-color: var(--color-accent-light);
    width: 60px;
    height: 60px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 7. Packages Section */
.packages-section {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

/* Package Tabs */
.package-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.tab-btn {
    background-color: white;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 12px 28px;
    font-size: 14px;
    font-weight: 700;
    border-radius: 99px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.tab-btn:hover {
    color: var(--color-primary-dark);
    border-color: var(--color-accent);
}

.tab-btn.active {
    background-color: var(--color-primary-dark);
    color: white;
    border-color: var(--color-primary-dark);
    box-shadow: 0 4px 14px rgba(6, 78, 59, 0.2);
}

.packages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.package-card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.package-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.package-card.recommended {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.package-badge-recommended {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-accent));
    color: white;
    padding: 6px 16px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    border-radius: 99px;
    letter-spacing: 1px;
}

.package-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 24px;
    margin-bottom: 24px;
}

.package-speed-badge {
    display: inline-block;
    padding: 6px 14px;
    background-color: var(--color-accent-light);
    color: var(--color-primary-dark);
    font-size: 13px;
    font-weight: 700;
    border-radius: 99px;
    margin-bottom: 12px;
}

.package-name {
    font-size: 20px;
    margin-bottom: 16px;
}

.package-price-wrapper {
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.package-currency {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary-dark);
}

.package-price {
    font-size: 40px;
    font-weight: 800;
    color: var(--color-primary-dark);
    line-height: 1;
}

.package-period {
    font-size: 13px;
    color: var(--text-secondary);
}

.package-features {
    list-style: none;
    margin-bottom: 32px;
    flex-grow: 1;
}

.package-features li {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.package-features li i {
    color: var(--color-accent);
    font-size: 14px;
}

.btn-package-select {
    width: 100%;
}

.package-notice {
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.package-notice i {
    color: var(--color-accent);
}

.loading-packages {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 0;
    color: var(--text-secondary);
}

.loading-packages i {
    font-size: 32px;
    color: var(--color-accent);
    margin-bottom: 16px;
}

/* 8. FAQ Section */
.faq-section {
    padding: 100px 0;
    background-color: var(--bg-primary);
}

.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    font-weight: 700;
    font-size: 16px;
    color: var(--color-primary-dark);
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--color-accent);
}

.faq-question i {
    font-size: 14px;
    transition: transform 0.3s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding: 12px 0 8px 0;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.faq-item.active .faq-question {
    color: var(--color-accent);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

/* 9. Contact Section */
.contact-section {
    padding: 100px 0;
    background-color: var(--bg-secondary);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-info-panel h2 {
    font-size: 36px;
    margin-top: 12px;
    margin-bottom: 16px;
}

.contact-info-panel p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-method-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.contact-method-card i {
    font-size: 20px;
    color: var(--color-accent);
    background-color: var(--color-accent-light);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    flex-shrink: 0;
}

.contact-method-card h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
}

.contact-method-card p {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0;
}

.contact-form-panel {
    background-color: white;
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.contact-form-panel h3 {
    font-size: 20px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-primary-dark);
    margin-bottom: 8px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 14px 20px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    font-family: var(--font-main);
    font-size: 13px;
    color: var(--text-primary);
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.btn-block {
    width: 100%;
    background-color: #25D366; /* WhatsApp Green */
    color: white;
    padding: 14px 0;
    box-shadow: 0 4px 14px rgba(37, 211, 102, 0.2);
}

.btn-block:hover {
    background-color: #20BA5A;
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.3);
}

/* 10. Footer Section */
.footer {
    background-color: var(--color-primary-dark);
    color: white;
    padding: 80px 0 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 0.8fr 0.9fr 0.8fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-brand .brand-logo {
    color: white;
    margin-bottom: 20px;
}

.footer-brand .logo-icon {
    color: var(--color-accent);
}

.footer-brand p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
    max-width: 280px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-links a {
    width: 36px;
    height: 36px;
    background-color: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 16px;
}

.social-links a:hover {
    background-color: var(--color-accent);
    color: white;
    transform: translateY(-3px);
}

.footer-links h4, .footer-contact h4 {
    color: white;
    font-size: 15px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background-color: var(--color-accent);
}

.footer-links a {
    display: block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 12px;
}

.footer-links a:hover {
    color: var(--color-accent);
    padding-left: 4px;
}

.footer-contact p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 30px 0;
}

.footer-bottom-container {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

/* 11. Keyframe Animations */
@keyframes pulse {
    0% {
        transform: scale(0.9);
        opacity: 0.6;
    }
    50% {
        transform: scale(1.1);
        opacity: 1;
    }
    100% {
        transform: scale(0.9);
        opacity: 0.6;
    }
}

/* 12. Media Queries (Responsiveness) */
@media (max-width: 991px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 50px;
        text-align: center;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-desc {
        margin: 0 auto 36px auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-image-card {
        transform: none;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .btn-hamburger {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding-top: 60px;
        gap: 40px;
        transition: left 0.4s ease;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.05);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: 18px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-container {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .contact-form-panel {
        padding: 24px;
    }
}