/* ==============================
   UW Stroomopslag - Duurzame Energieoplossingen
   Style Sheet
   ============================== */

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0a7e3d;
    --primary-dark: #065a2a;
    --primary-light: #e8f5e9;
    --secondary: #0288d1;
    --secondary-dark: #01579b;
    --accent: #ffb300;
    --accent-dark: #ff8f00;
    --dark: #1a1a2e;
    --dark-light: #2d2d44;
    --text: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --off-white: #f8f9fa;
    --gray: #e9ecef;
    --gray-dark: #adb5bd;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    background: var(--white);
}

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

a:hover {
    color: var(--secondary-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.2;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(10, 126, 61, 0.35);
}

.btn-secondary {
    background: var(--secondary);
    color: var(--white);
}

.btn-secondary:hover {
    background: var(--secondary-dark);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(2, 136, 209, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

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

.btn-whatsapp {
    background: #25D366;
    color: var(--white);
}

.btn-whatsapp:hover {
    background: #1da851;
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.35);
}

/* --- Header / Navigation --- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 10px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.header-scrolled {
    background: rgba(255,255,255,0.98);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    padding-bottom: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: var(--primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.3rem;
}

.logo span {
    color: var(--dark);
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav a {
    color: var(--text);
    font-weight: 500;
    padding: 8px 18px;
    border-radius: 8px;
    transition: var(--transition);
    font-size: 0.95rem;
}

.nav a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.nav a.cta-nav {
    background: var(--primary);
    color: var(--white);
    padding: 10px 24px;
    border-radius: 50px;
}

.nav a.cta-nav:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: var(--dark);
    border-radius: 3px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #0a7e3d 0%, #065a2a 40%, #01579b 100%);
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-content h1 span {
    color: var(--accent);
    display: block;
}

.hero-content p {
    font-size: 1.15rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 30px;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    padding: 8px 18px;
    border-radius: 50px;
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 25px;
}

.hero-badge i {
    font-size: 1rem;
}

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

.hero-illustration {
    width: 100%;
    max-width: 480px;
    background: rgba(255,255,255,0.08);
    border-radius: 24px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
}

.hero-illustration-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.hero-icon-card {
    background: rgba(255,255,255,0.12);
    border-radius: 16px;
    padding: 25px 20px;
    text-align: center;
    color: var(--white);
    transition: var(--transition);
}

.hero-icon-card:hover {
    background: rgba(255,255,255,0.18);
    transform: translateY(-3px);
}

.hero-icon-card .icon {
    font-size: 2.2rem;
    margin-bottom: 8px;
}

.hero-icon-card .label {
    font-size: 0.85rem;
    font-weight: 600;
    opacity: 0.9;
}

.hero-icon-card.featured {
    background: rgba(255, 179, 0, 0.2);
    border: 2px solid rgba(255, 179, 0, 0.3);
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 20px;
}

.hero-icon-card.featured .icon {
    font-size: 2rem;
    margin-bottom: 0;
}

.hero-icon-card.featured .label {
    font-size: 1rem;
}

/* --- Section General --- */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 15px;
}

.section-header h2 span {
    color: var(--primary);
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.section-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
}

/* --- Services Section --- */
.services {
    background: var(--off-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 35px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--gray);
}

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

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary);
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover::before {
    opacity: 1;
}

.service-card.featured::before {
    background: var(--accent);
    opacity: 1;
    height: 5px;
}

.service-card.featured {
    border-color: var(--accent);
    border-width: 2px;
    transform: scale(1.02);
}

.service-card.featured:hover {
    transform: scale(1.02) translateY(-6px);
}

.service-card .icon {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.service-card .icon.green {
    background: var(--primary-light);
    color: var(--primary);
}

.service-card .icon.blue {
    background: #e3f2fd;
    color: var(--secondary);
}

.service-card .icon.yellow {
    background: #fff8e1;
    color: var(--accent-dark);
}

.service-card .icon.orange {
    background: #fff3e0;
    color: #e65100;
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
}

.service-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 18px;
}

.service-card .badge {
    display: inline-block;
    background: var(--accent);
    color: var(--dark);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 12px;
    border-radius: 50px;
    margin-bottom: 10px;
}

.service-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.service-link:hover {
    gap: 10px;
}

/* --- Why Us Section --- */
.why-us {
    background: var(--white);
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.why-us-item {
    text-align: center;
    padding: 35px 25px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.why-us-item:hover {
    background: var(--off-white);
}

.why-us-item .number {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 1.6rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
}

.why-us-item h4 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--dark);
}

.why-us-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* --- Batteries Highlight (special section) --- */
.batteries-highlight {
    background: linear-gradient(135deg, #0a7e3d 0%, #01579b 100%);
    padding: 80px 0;
    color: var(--white);
}

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

.batteries-highlight h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.batteries-highlight h2 span {
    color: var(--accent);
}

.batteries-highlight p {
    color: rgba(255,255,255,0.9);
    font-size: 1.05rem;
    margin-bottom: 25px;
}

.batteries-highlight ul {
    list-style: none;
    margin-bottom: 25px;
}

.batteries-highlight ul li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.batteries-highlight ul li::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(255,179,0,0.2);
    border-radius: 50%;
    color: var(--accent);
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.batteries-highlight .image-placeholder {
    background: rgba(255,255,255,0.08);
    border-radius: 24px;
    padding: 40px;
    text-align: center;
    border: 2px dashed rgba(255,255,255,0.2);
}

.batteries-highlight .image-placeholder .big-icon {
    font-size: 5rem;
    margin-bottom: 15px;
}

.batteries-highlight .image-placeholder p {
    font-size: 0.95rem;
    margin-bottom: 0;
    color: rgba(255,255,255,0.7);
}

/* --- Contact Section --- */
.contact {
    background: var(--off-white);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 15px;
}

.contact-info > p {
    color: var(--text-light);
    margin-bottom: 30px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 30px;
}

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

.contact-item .icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.contact-item .text strong {
    display: block;
    font-size: 1rem;
    color: var(--dark);
}

.contact-item .text span {
    color: var(--text-light);
    font-size: 0.95rem;
}

.contact-item .text a {
    color: var(--text-light);
}

.contact-item .text a:hover {
    color: var(--primary);
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--dark);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font);
    transition: var(--transition);
    background: var(--white);
    color: var(--text);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(10, 126, 61, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

/* --- Footer --- */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 30px;
}

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

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 15px;
}

.footer-brand .logo span {
    color: rgba(255,255,255,0.7);
}

.footer-brand p {
    font-size: 0.9rem;
    max-width: 300px;
    line-height: 1.6;
}

.footer h4 {
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer ul {
    list-style: none;
}

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

.footer ul li a {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.footer ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 0.85rem;
}

.footer-bottom a {
    color: rgba(255,255,255,0.6);
}

.footer-bottom a:hover {
    color: var(--white);
}

/* --- WhatsApp Float Button --- */
.whatsapp-float {
    position: fixed;
    bottom: 25px;
    right: 25px;
    z-index: 999;
    width: 60px;
    height: 60px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.8rem;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
    color: var(--white);
}

/* --- Toast Notification --- */
.toast {
    position: fixed;
    bottom: 100px;
    right: 25px;
    background: var(--dark);
    color: var(--white);
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 9999;
    font-size: 0.9rem;
    max-width: 350px;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-left: 4px solid var(--primary);
}

.toast.error {
    border-left: 4px solid #e53935;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-content p {
        margin: 0 auto 30px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-badge {
        justify-content: center;
    }

    .hero-illustration {
        max-width: 400px;
        margin: 0 auto;
    }

    .batteries-highlight .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .batteries-highlight ul li {
        justify-content: center;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.1);
        gap: 5px;
    }

    .nav.active {
        display: flex;
    }

    .nav a {
        width: 100%;
        text-align: center;
        padding: 12px;
    }

    .nav a.cta-nav {
        width: 100%;
        text-align: center;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .section {
        padding: 70px 0;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .hero-illustration-grid {
        grid-template-columns: 1fr 1fr;
    }

    .hero-icon-card.featured {
        grid-column: 1 / -1;
    }

    .batteries-highlight h2 {
        font-size: 2rem;
    }

    .contact-form {
        padding: 25px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }

    .service-card.featured {
        transform: none;
    }

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

    .whatsapp-float {
        width: 52px;
        height: 52px;
        font-size: 1.5rem;
        bottom: 15px;
        right: 15px;
    }
}