/* ==========================================================================
   GAMA WATER - DESIGN SYSTEM & STYLESHEET
   Theme: Flyer Replicated Fresh Water (Clean Light Theme, Royal Blue & Cyan Accents)
   ========================================================================== */

/* 1. Variables & Design Tokens */
:root {
    /* Color Palette - Fresh Water Light Theme */
    --color-bg-primary: #ffffff;      /* Pure white background */
    --color-bg-secondary: #f4f8fc;    /* Light fresh water blue */
    --color-bg-tertiary: #ebf3fa;     /* Baby blue card background */
    --color-bg-glass: rgba(255, 255, 255, 0.85); /* Glassmorphic header */
    
    --color-border: #d0e1f4;          /* Light metallic blue border */
    --color-border-hover: #a5c7f0;    /* Highlighted border */
    
    --color-text-primary: #0a1629;    /* Deep navy dark blue (high contrast) */
    --color-text-secondary: #4a5568;  /* Dark slate gray */
    --color-text-muted: #718096;      /* Muted steel gray */
    
    --color-accent: #0b53a7;          /* Royal Blue (Flyer theme) */
    --color-accent-fresh: #00a3c4;    /* Fresh Cyan (Water element) */
    --color-accent-hover: #083c7a;
    --color-accent-glow: rgba(11, 83, 167, 0.1);
    
    --color-highlight: #ffb300;       /* Orange-yellow for promo badges */
    --color-highlight-orange: #ff9800;/* Bright orange */
    --color-wa-green: #25d366;        /* WhatsApp green */
    --color-wa-green-hover: #20ba56;
    
    --gradient-blue: linear-gradient(135deg, #00a3c4, #0b53a7);
    --gradient-card: linear-gradient(180deg, #ffffff 0%, #f7faff 100%);
    --gradient-dark-blue: linear-gradient(135deg, #0b2545, #081d38);

    /* Typography */
    --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing & Layout */
    --container-max-width: 1200px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    
    /* Box Shadows */
    --shadow-sm: 0 4px 12px rgba(11, 83, 167, 0.05);
    --shadow-md: 0 8px 24px rgba(11, 83, 167, 0.08);
    --shadow-lg: 0 16px 40px rgba(11, 83, 167, 0.12);
}

/* 2. Global Resets & Accessibility */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--border-radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent-fresh);
}

/* Focus Outline for Accessibility */
a:focus-visible, 
button:focus-visible, 
input:focus-visible, 
select:focus-visible, 
textarea:focus-visible {
    outline: 3px solid var(--color-accent-fresh);
    outline-offset: 2px;
}

/* 3. Typography Styles */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.3rem, 5vw, 3.5rem);
    color: var(--color-accent);
    margin-bottom: 1.5rem;
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--color-accent);
    margin-bottom: 1rem;
}

h3 {
    font-size: clamp(1.2rem, 2.5vw, 1.5rem);
    margin-bottom: 0.5rem;
}

p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.lead {
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    font-weight: 400;
}

.subtitle {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent-fresh);
    margin-bottom: 0.5rem;
}

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

.text-center {
    text-align: center;
}

.mb-4 {
    margin-bottom: 1.5rem;
}

/* 4. Layout & Grid Utilities */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.grid-5 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 992px) {
    .grid-5 {
        grid-template-columns: repeat(5, 1fr);
    }
}

.align-center {
    align-items: center;
}

.section {
    padding: clamp(50px, 8vw, 80px) 0;
}

.bg-secondary {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-header {
    max-width: 650px;
    margin: 0 auto 40px auto;
}

.section-desc {
    font-size: 1.1rem;
}

/* 5. Buttons & Interactive Elements */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    padding: 12px 24px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-smooth);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
    box-shadow: var(--shadow-sm);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-secondary:hover {
    background-color: rgba(11, 83, 167, 0.05);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-outline:hover {
    background-color: rgba(11, 83, 167, 0.05);
    transform: translateY(-2px);
}

.btn-wa {
    background-color: var(--color-wa-green);
    color: white;
    box-shadow: 0 4px 10px rgba(37, 211, 102, 0.2);
}

.btn-wa:hover {
    background-color: var(--color-wa-green-hover);
    box-shadow: 0 6px 15px rgba(37, 211, 102, 0.3);
    transform: translateY(-2px);
}

.btn-wa svg {
    margin-right: 8px;
}

.btn-highlight {
    background-color: var(--color-highlight);
    color: var(--color-text-primary);
}

.btn-highlight:hover {
    background-color: #ff9800;
    transform: translateY(-2px);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Flyer Badge: Gratis Antar */
.badge-row {
    margin-bottom: 1rem;
}

.badge-flyer {
    display: inline-flex;
    align-items: center;
    background-color: var(--color-highlight);
    color: var(--color-text-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
}

.badge-flyer .icon {
    margin-right: 8px;
}

.badge-flyer .sub {
    font-weight: 400;
    font-size: 0.75rem;
    margin-left: 6px;
    opacity: 0.9;
}

/* Glassmorphism Panel */
.glass-panel {
    background: var(--color-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

/* 6. Header & Navbar Styles */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--color-bg-primary);
    transition: var(--transition-smooth);
    border-bottom: 1px solid var(--color-border);
}

.main-header.scrolled {
    background: var(--color-bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-sm);
    padding: 5px 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    padding-bottom: 15px;
    transition: var(--transition-smooth);
}

.main-header.scrolled .header-container {
    padding-top: 10px;
    padding-bottom: 10px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
    transition: var(--transition-smooth);
    display: block;
}

.logo:hover .logo-img {
    transform: translateY(-2px);
}

.main-nav {
    display: none;
}

.nav-list {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text-secondary);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    position: relative;
    padding: 6px 0;
    transition: var(--transition-smooth);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--color-accent-fresh);
    transition: var(--transition-smooth);
}

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

.btn-nav {
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: var(--border-radius-sm);
}

.btn-nav::after {
    display: none;
}

/* Mobile Nav Toggle Button */
.mobile-nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.mobile-nav-toggle .bar {
    width: 100%;
    height: 2.5px;
    background-color: var(--color-text-primary);
    transition: var(--transition-smooth);
}

@media (min-width: 992px) {
    .main-nav {
        display: block;
    }
    
    .mobile-nav-toggle {
        display: none;
    }
}

@media (max-width: 991px) {
    .main-nav.nav-open {
        display: flex;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: var(--color-bg-primary);
        z-index: 999;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    
    .main-nav.nav-open .nav-list {
        flex-direction: column;
        gap: 30px;
    }
    
    .main-nav.nav-open .nav-link {
        font-size: 1.35rem;
    }
    
    .mobile-nav-toggle[aria-expanded="true"] .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .mobile-nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
}

/* 7. Hero Section Styles */
.hero-section {
    padding-top: 130px;
    padding-bottom: 50px;
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: radial-gradient(circle at 80% 20%, rgba(0, 163, 196, 0.05) 0%, rgba(255, 255, 255, 0) 50%);
}

.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.target-uses {
    display: flex;
    gap: 15px;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.use-item {
    display: inline-flex;
    align-items: center;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
}

.use-icon {
    margin-right: 6px;
}

.hero-actions {
    display: flex;
    gap: 15px;
    margin-top: 2rem;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.hero-img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.hero-image-wrapper:hover .hero-img {
    transform: scale(1.02);
}

.hero-accent-circle {
    position: absolute;
    width: 80%;
    height: 80%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 163, 196, 0.1) 0%, rgba(0, 0, 0, 0) 70%);
    bottom: -10%;
    right: -10%;
    z-index: -1;
    pointer-events: none;
    filter: blur(15px);
}

/* 8. USP Section Styles */
.usp-grid {
    margin-top: 10px;
}

.usp-card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    padding: 30px 20px;
    border-radius: var(--border-radius-md);
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

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

.usp-icon-wrapper {
    width: 55px;
    height: 55px;
    background-color: var(--color-bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px auto;
    border: 1px solid var(--color-border);
    transition: var(--transition-smooth);
}

.usp-card:hover .usp-icon-wrapper {
    background-color: var(--color-bg-tertiary);
    border-color: var(--color-accent-fresh);
}

.usp-icon {
    font-size: 1.5rem;
}

.usp-card h4 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--color-accent);
}

.usp-card p {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: 0;
}

/* 9. Product Section & Tabs Styles */
.filter-tabs {
    margin-bottom: 35px;
}

.filter-btn {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.9rem;
    padding: 10px 20px;
    border-radius: 50px;
    cursor: pointer;
    margin: 0 5px 10px 5px;
    transition: var(--transition-smooth);
}

.filter-btn:hover, .filter-btn.active {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

.product-grid {
    margin-top: 10px;
}

.product-card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    position: relative;
}

.product-card:hover {
    border-color: var(--color-accent-fresh);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.product-card.featured {
    border-color: var(--color-border-hover);
    box-shadow: 0 4px 15px rgba(0, 163, 196, 0.08);
}

.product-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--color-accent-fresh);
    color: white;
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 20px;
    z-index: 10;
}

.product-badge.accent-fresh {
    background-color: var(--color-accent);
}

.product-graphic {
    background-color: var(--color-bg-secondary);
    padding: 30px 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    height: 180px;
}

.product-svg {
    width: 100px;
    height: 120px;
    transition: var(--transition-smooth);
    filter: drop-shadow(0 4px 6px rgba(11, 83, 167, 0.15));
}

.product-card:hover .product-svg {
    transform: scale(1.05) rotate(1deg);
}

.product-details {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.brand-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 5px;
}

.product-details h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.product-details .description {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.price-row {
    margin-bottom: 1.25rem;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.price-value {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
}

.price-unit {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.price-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-text-muted);
}

/* UMKM Promo Card */
.product-promo-card {
    background: var(--gradient-dark-blue);
    color: white;
    border-radius: var(--border-radius-md);
    padding: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.product-promo-card h3 {
    color: white;
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.product-promo-card p {
    color: #a5c7f0;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.promo-icon {
    font-size: 2rem;
    margin-bottom: 15px;
}

.promo-badge {
    background-color: var(--color-highlight);
    color: var(--color-text-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.8rem;
    padding: 6px 12px;
    border-radius: 50px;
    align-self: flex-start;
    margin-bottom: 25px;
}

/* 10. Water Calculator Section Styles */
.kalkulator-card {
    padding: 30px;
}

.calc-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

@media (min-width: 768px) {
    .calc-grid {
        grid-template-columns: 1fr 1fr;
    }
}

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

.form-group label {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text-primary);
}

.form-control {
    width: 100%;
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    padding: 12px;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-control:focus {
    border-color: var(--color-accent-fresh);
    box-shadow: 0 0 10px rgba(0, 163, 196, 0.1);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg fill='%230b53a7' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'><path d='M7 10l5 5 5-5z'/><path d='M0 0h24v24H0z' fill='none'/></svg>");
    background-repeat: no-repeat;
    background-position-x: calc(100% - 15px);
    background-position-y: 50%;
    padding-right: 45px;
}

.calc-outputs {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.output-block {
    text-align: center;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 15px;
    margin-bottom: 15px;
}

.output-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.output-value {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-top: 3px;
}

.output-value span {
    color: var(--color-accent);
}

.output-recommendation {
    flex-grow: 1;
    margin-bottom: 20px;
    border-left: 3px solid var(--color-accent-fresh);
    padding-left: 15px;
}

.output-recommendation h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.recommendation-title {
    font-size: 1.2rem;
    color: var(--color-accent);
    margin-bottom: 4px;
}

.recommendation-desc {
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 0;
}

/* 11. Kontak & QR Code Section Styles */
.contact-details {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.contact-item .icon {
    font-size: 1.35rem;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    width: 45px;
    height: 45px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item h5 {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 3px;
}

.contact-item p {
    margin-bottom: 0;
    font-size: 1rem;
    color: var(--color-text-primary);
}

.contact-link {
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.contact-link:hover {
    color: var(--color-accent);
}

.kontak-form-wrapper {
    padding: 35px;
}

.kontak-form-wrapper h3 {
    margin-bottom: 10px;
}

.qr-code-wrapper {
    display: flex;
    justify-content: center;
    margin: 20px 0;
}

.qr-img {
    width: 160px;
    height: 160px;
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-md);
    border: 3px solid var(--color-accent);
    background: white;
    padding: 6px;
    transition: var(--transition-smooth);
}

.qr-img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.phone-display {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.02em;
    margin-top: 10px;
}

/* 12. Footer Styles */
.main-footer {
    background-color: #081d38; /* Dark Navy from flyer footer style */
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 60px 0 25px 0;
    color: white;
}

.main-footer p, .main-footer a, .main-footer h4 {
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    }
}

.footer-brand .logo {
    margin-bottom: 15px;
}

.logo-img-footer {
    height: 50px;
    width: auto;
    object-fit: contain;
    transition: var(--transition-smooth);
    display: block;
    filter: brightness(0) invert(1);
}

.footer-desc {
    font-size: 0.85rem;
    opacity: 0.75;
    margin-bottom: 20px;
}

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

.social-icon {
    text-decoration: none;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 34px;
    height: 34px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    transition: var(--transition-smooth);
}

.social-icon:hover {
    color: var(--color-text-primary);
    background-color: var(--color-highlight);
    border-color: var(--color-highlight);
    transform: translateY(-2px);
}

.footer-links h4, .footer-newsletter h4 {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 8px;
    color: white;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 25px;
    height: 2px;
    background-color: var(--color-accent-fresh);
}

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

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    text-decoration: none;
    font-size: 0.85rem;
    opacity: 0.75;
    transition: var(--transition-smooth);
}

.footer-links ul li a:hover {
    color: var(--color-accent-fresh);
    opacity: 1;
    padding-left: 4px;
}

.footer-newsletter p {
    font-size: 0.85rem;
    opacity: 0.75;
    margin-bottom: 15px;
}

.bottom-usps {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 25px;
    font-size: 0.75rem;
    opacity: 0.6;
}

/* 13. Scroll Reveal Animations (JS Triggered) */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Layout shift prevention: content-visibility for offscreen sections */
.usp-section, .produk-section, .kalkulator-section, .kontak-section {
    content-visibility: auto;
    contain-intrinsic-size: 500px;
}