/* ============================================
   Alkan Tel Çit - Ana Stil Dosyası
   Kurumsal & Minimalist Yeşil Tema
   ============================================ */

/* ---------- CSS Reset & Variables ---------- */
:root {
    /* Primary Green Palette */
    --green-900: #1B5E20;
    --green-800: #2E7D32;
    --green-700: #388E3C;
    --green-600: #43A047;
    --green-500: #4CAF50;
    --green-400: #66BB6A;
    --green-300: #81C784;
    --green-200: #A5D6A7;
    --green-100: #C8E6C9;
    --green-50: #E8F5E9;

    /* Neutral Palette */
    --dark: #1a1a2e;
    --dark-grey: #333333;
    --medium-grey: #666666;
    --light-grey: #999999;
    --border-grey: #e0e0e0;
    --bg-light: #f8f9fa;
    --bg-off-white: #fafffe;
    --white: #ffffff;

    /* Typography */
    --font-primary: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

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

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

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

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

ul {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--dark);
}

/* ---------- Utility Classes ---------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--green-500), var(--green-300));
    border-radius: 2px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--medium-grey);
    max-width: 600px;
    margin: 20px auto 0;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--green-700), var(--green-600));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(46, 125, 50, 0.35);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--green-800), var(--green-700));
    box-shadow: 0 6px 20px rgba(46, 125, 50, 0.5);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--white);
    color: var(--green-800);
}

.btn-outline-green {
    background: transparent;
    color: var(--green-700);
    border: 2px solid var(--green-700);
}

.btn-outline-green:hover {
    background: var(--green-700);
    color: var(--white);
}

/* ---------- HEADER / NAVBAR ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--green-800);
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--green-700), var(--green-500));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    font-weight: 900;
}

.logo span {
    color: var(--green-500);
    font-weight: 600;
}

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

.nav-links a {
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--dark-grey);
    border-radius: var(--radius-sm);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 20px;
    right: 20px;
    height: 2px;
    background: var(--green-600);
    border-radius: 1px;
    transform: scaleX(0);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    transform: scaleX(1);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--green-700);
}

.nav-links .btn-primary {
    padding: 10px 24px;
    font-size: 0.9rem;
}

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

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 3px;
    background: var(--dark-grey);
    border-radius: 2px;
    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 {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--green-900) 0%, var(--green-700) 40%, var(--green-500) 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
}

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

.hero-text h1 {
    font-size: 3.5rem;
    color: var(--white);
    margin-bottom: 24px;
    line-height: 1.15;
}

.hero-text h1 .highlight {
    color: var(--green-200);
    display: block;
}

.hero-text p {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
    max-width: 500px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    z-index: 1;
}

.hero-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 50px;
}

.stat-item {
    text-align: left;
}

.stat-item .stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--white);
    display: block;
}

.stat-item .stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ---------- ABOUT SECTION (Homepage) ---------- */
.about-preview {
    background: var(--bg-off-white);
}

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

.about-image-wrapper {
    position: relative;
}

.about-image-wrapper img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.about-image-wrapper .experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: linear-gradient(135deg, var(--green-700), var(--green-500));
    color: white;
    padding: 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.experience-badge .number {
    font-size: 2.5rem;
    font-weight: 800;
    display: block;
    line-height: 1;
}

.experience-badge .label {
    font-size: 0.85rem;
    opacity: 0.9;
}

.about-text h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.about-text .subtitle {
    color: var(--green-600);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.about-text p {
    color: var(--medium-grey);
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 30px;
}

.about-feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--white);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.about-feature-item .icon {
    width: 36px;
    height: 36px;
    background: var(--green-50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--green-700);
    font-size: 1rem;
    flex-shrink: 0;
}

.about-feature-item span {
    font-size: 0.9rem;
    font-weight: 500;
}

/* ---------- PRODUCTS GRID ---------- */
.products-section {
    background: var(--white);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-grey);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--green-200);
}

.product-card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

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

.product-card:hover .product-card-image img {
    transform: scale(1.05);
}

.product-card-image .category-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(46, 125, 50, 0.9);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.product-card-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card-content h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
    color: var(--dark);
}

.product-card-content p {
    font-size: 0.9rem;
    color: var(--medium-grey);
    margin-bottom: 20px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card-content .card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--green-700);
    font-weight: 600;
    font-size: 0.9rem;
}

.product-card-content .card-link:hover {
    gap: 10px;
    color: var(--green-900);
}

.product-card-content .card-link .arrow {
    transition: var(--transition);
}

/* ---------- PRODUCT DETAIL PAGE ---------- */
.product-detail-section {
    padding-top: 120px;
    padding-bottom: 80px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 30px;
    font-size: 0.9rem;
    color: var(--light-grey);
}

.breadcrumb a {
    color: var(--green-700);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb .separator {
    color: var(--border-grey);
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.product-detail-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    width: 100%;
}

.product-detail-info h1 {
    font-size: 2.4rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.product-detail-info .description {
    font-size: 1.05rem;
    color: var(--medium-grey);
    line-height: 1.8;
    margin-bottom: 32px;
}

.detail-section {
    margin-bottom: 32px;
}

.detail-section h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--green-800);
    display: flex;
    align-items: center;
    gap: 10px;
}

.detail-section h3 .icon {
    width: 32px;
    height: 32px;
    background: var(--green-50);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.detail-list {
    list-style: none;
}

.detail-list li {
    padding: 10px 16px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.detail-list li:hover {
    background: var(--green-50);
}

.detail-list li::before {
    content: '✓';
    color: var(--green-600);
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.dimension-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.dimension-tag {
    padding: 8px 18px;
    background: var(--green-50);
    border: 2px solid var(--green-200);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--green-800);
    transition: var(--transition);
}

.dimension-tag:hover {
    background: var(--green-700);
    border-color: var(--green-700);
    color: var(--white);
}

.usage-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.usage-tag {
    padding: 8px 18px;
    background: var(--white);
    border: 1px solid var(--border-grey);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    color: var(--medium-grey);
    transition: var(--transition);
}

.usage-tag:hover {
    border-color: var(--green-400);
    color: var(--green-700);
    background: var(--green-50);
}

.cta-box {
    margin-top: 32px;
    padding: 24px;
    background: linear-gradient(135deg, var(--green-50), var(--green-100));
    border-radius: var(--radius-md);
    border-left: 4px solid var(--green-600);
}

.cta-box p {
    font-size: 1rem;
    color: var(--dark-grey);
    margin-bottom: 16px;
    font-weight: 500;
}

/* ---------- ABOUT PAGE ---------- */
.page-hero {
    padding: 140px 0 60px;
    background: linear-gradient(135deg, var(--green-900), var(--green-700));
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    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");
}

.page-hero h1 {
    font-size: 3rem;
    color: white;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.page-hero p {
    font-size: 1.15rem;
    opacity: 0.85;
    position: relative;
    z-index: 1;
}

.about-page-content {
    padding: 80px 0;
}

.about-page-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.about-page-grid.reverse {
    direction: rtl;
}

.about-page-grid.reverse > * {
    direction: ltr;
}

.about-page-text h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.about-page-text p {
    color: var(--medium-grey);
    font-size: 1.05rem;
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-page-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.values-section {
    background: var(--bg-off-white);
    padding: 80px 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.value-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-grey);
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--green-200);
}

.value-card .value-icon {
    width: 64px;
    height: 64px;
    background: var(--green-50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
}

.value-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.value-card p {
    color: var(--medium-grey);
    font-size: 0.95rem;
}

/* ---------- CONTACT PAGE ---------- */
.contact-section {
    padding: 80px 0;
}

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

.contact-form-wrapper h2 {
    font-size: 2rem;
    margin-bottom: 10px;
}

.contact-form-wrapper > p {
    color: var(--medium-grey);
    margin-bottom: 30px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--dark-grey);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 14px 18px;
    border: 2px solid var(--border-grey);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--dark-grey);
    background: var(--white);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--green-500);
    box-shadow: 0 0 0 4px rgba(76, 175, 80, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-info-wrapper {
    padding: 40px;
    background: linear-gradient(135deg, var(--green-800), var(--green-600));
    border-radius: var(--radius-lg);
    color: white;
}

.contact-info-wrapper h2 {
    color: white;
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.contact-info-wrapper > p {
    opacity: 0.85;
    margin-bottom: 30px;
}

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

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-info-item .icon-circle {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-info-item h4 {
    color: white;
    font-size: 1rem;
    margin-bottom: 4px;
}

.contact-info-item p {
    opacity: 0.85;
    font-size: 0.95rem;
    line-height: 1.6;
}

.contact-map {
    margin-top: 30px;
    border-radius: var(--radius-md);
    overflow: hidden;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    opacity: 0.5;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-col h3 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.footer-col .footer-logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--green-400);
    margin-bottom: 16px;
    display: block;
}

.footer-col p {
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

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

.footer-col ul li a {
    font-size: 0.95rem;
    opacity: 0.7;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    opacity: 1;
    color: var(--green-400);
    padding-left: 5px;
}

.footer-contact-info p {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.5;
}

/* ---------- CTA SECTION ---------- */
.cta-section {
    background: linear-gradient(135deg, var(--green-800), var(--green-600));
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
}

.cta-section h2 {
    color: white;
    font-size: 2.4rem;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.15rem;
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

/* ---------- Products Page Filter ---------- */
.products-page {
    padding-top: 120px;
    padding-bottom: 80px;
    min-height: 80vh;
}

.products-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 24px;
    background: var(--bg-light);
    border: 2px solid var(--border-grey);
    border-radius: var(--radius-xl);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--medium-grey);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--green-700);
    border-color: var(--green-700);
    color: var(--white);
}

.products-grid-full {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* ---------- 404 / NOT FOUND ---------- */
.not-found {
    text-align: center;
    padding: 160px 0 80px;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.not-found h1 {
    font-size: 6rem;
    color: var(--green-200);
    margin-bottom: 16px;
}

.not-found h2 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.not-found p {
    color: var(--medium-grey);
    margin-bottom: 30px;
}

/* ---------- SUCCESS / ALERT MESSAGES ---------- */
.alert {
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.alert-success {
    background: var(--green-50);
    border: 1px solid var(--green-200);
    color: var(--green-800);
}

.alert-error {
    background: #fff5f5;
    border: 1px solid #ffcdd2;
    color: #c62828;
}

/* ---------- SCROLL ANIMATIONS ---------- */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- BACK TO TOP BUTTON ---------- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--green-700);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--green-800);
    transform: translateY(-3px);
}

/* ---------- RESPONSIVE DESIGN ---------- */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text p {
        margin: 0 auto 36px;
    }

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

    .hero-image {
        display: none;
    }

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

    .products-grid,
    .products-grid-full {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid,
    .about-page-grid,
    .product-detail-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .about-page-grid.reverse {
        direction: ltr;
    }

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

    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 320px;
        height: 100vh;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 16px;
        box-shadow: var(--shadow-xl);
        transition: var(--transition);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: 12px 24px;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        min-height: 80vh;
    }

    .hero-text h1 {
        font-size: 2.4rem;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-item .stat-number {
        font-size: 1.8rem;
    }

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

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

    .products-grid-full {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-features {
        grid-template-columns: 1fr;
    }

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

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

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

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

    .product-detail-info h1 {
        font-size: 1.8rem;
    }

    .section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 2rem;
    }

    .products-grid-full {
        grid-template-columns: 1fr;
    }

    .contact-info-wrapper {
        padding: 24px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 16px;
    }

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

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .dimension-tags {
        gap: 8px;
    }

    .dimension-tag {
        font-size: 0.8rem;
        padding: 6px 14px;
    }
}

/* ---------- Mobile Navigation Overlay ---------- */
.nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 998;
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
}