@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

/* ==========================================
   DESIGN TOKENS & RESET
   ========================================== */
:root {
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;

    /* Color Palette */
    --color-primary: #d32f2f;         /* Rich Crimson Red */
    --color-primary-rgb: 211, 47, 47;
    --color-primary-hover: #b71c1c;
    --color-accent: #ff3344;          /* Electric Red Accent */
    --color-accent-rgb: 255, 51, 68;
    --color-dark-bg: #0b0b0c;         /* Pure Deep Obsidian Black */
    --color-card-bg: #141416;         /* Charcoal/Matte Black */
    --color-card-border: rgba(255, 255, 255, 0.05);
    --color-white: #ffffff;
    --color-gray-100: #f5f5f7;
    --color-gray-300: #d2d2d7;
    --color-gray-500: #86868b;
    --color-gray-700: #424245;
    --color-gray-800: #1d1d1f;

    /* Glassmorphism */
    --glass-bg: rgba(20, 20, 22, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: rgba(0, 0, 0, 0.5);

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-normal: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--color-dark-bg);
    color: var(--color-white);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
}

body {
    overflow-x: hidden;
    line-height: 1.6;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-dark-bg);
}
::-webkit-scrollbar-thumb {
    background: var(--color-gray-700);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

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

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

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

ul {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    background: none;
    border: none;
    outline: none;
}

/* Common Layout Containers */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 8rem 0;
    position: relative;
}

/* Gradient text utility */
.text-gradient-red {
    background: linear-gradient(135deg, var(--color-white) 30%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-gradient-full-red {
    background: linear-gradient(135deg, #ff6b6b 0%, var(--color-primary) 50%, #900c0f 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition-normal);
}

.header.scrolled {
    padding: 0.8rem 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 10px 30px var(--glass-shadow);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-img {
    height: 60px;
    width: auto;
    transition: var(--transition-normal);
}

.header.scrolled .logo-img {
    height: 60px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-gray-300);
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.8rem 1.6rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
    color: var(--color-white);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 15px rgba(211, 47, 47, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-hover) 0%, #900c0f 100%);
    box-shadow: 0 6px 20px rgba(211, 47, 47, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 1px solid var(--color-gray-700);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-gray-500);
    transform: translateY(-2px);
}

.btn-whatsapp {
    background: #25d366;
    color: var(--color-white);
}

.btn-whatsapp:hover {
    background: #20ba5a;
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.3);
    transform: translateY(-2px);
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1100;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-white);
    transition: var(--transition-fast);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero {
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
    background: radial-gradient(circle at 80% 20%, rgba(211, 47, 47, 0.12) 0%, transparent 50%),
                radial-gradient(circle at 10% 80%, rgba(0, 0, 0, 0.8) 0%, transparent 60%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

/* Grid & Glass Background Panels */
.hero-bg-images {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    z-index: 1;
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
    background-size: cover;
    background-position: center;
}

.hero-slide.active {
    opacity: 0.6;
}

.hero .container {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    max-width: 720px;
}

.badge-wrapper {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
    margin-top: 3rem;
}

.hero-badge {
    background: rgba(211, 47, 47, 0.15);
    border: 1px solid rgba(211, 47, 47, 0.3);
    color: var(--color-accent);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-badge.winperax-badge {
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--color-white);
}

.hero-badge.winperax-badge strong {
    color: var(--color-accent);
    margin-right: 0.2rem;
}

.hero-title {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--color-gray-300);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
}

/* Floating Decorative Elements */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.glass-floating-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 20px 50px rgba(0,0,0,0.4);
    position: relative;
    z-index: 5;
    animation: float 6s ease-in-out infinite;
    max-width: 320px;
}

.glass-floating-card h4 {
    color: var(--color-white);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.glass-floating-card p {
    color: var(--color-gray-300);
    font-size: 0.9rem;
    line-height: 1.5;
}

.glass-floating-card .highlight {
    color: var(--color-accent);
    font-weight: 700;
    font-size: 2.5rem;
    display: block;
    margin-top: 0.5rem;
    line-height: 1;
}

.floating-circle {
    position: absolute;
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(211, 47, 47, 0.4) 0%, transparent 70%);
    filter: blur(40px);
    z-index: 1;
    animation: pulse-glow 8s infinite alternate;
}

/* ==========================================
   ABOUT US SECTION (HAKKIMIZDA)
   ========================================== */
.about {
    background: var(--color-dark-bg);
    position: relative;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 600px;
    background: radial-gradient(circle, rgba(211, 47, 47, 0.05) 0%, transparent 70%);
    filter: blur(60px);
    pointer-events: none;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-images {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(12, 1fr);
    position: relative;
    height: 500px;
}

.about-img-box {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    border: 1px solid var(--color-card-border);
}

.about-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.about-img-box:hover img {
    transform: scale(1.08);
}

.about-img-1 {
    grid-column: 1 / 9;
    grid-row: 1 / 10;
    z-index: 3;
}

.about-img-2 {
    grid-column: 5 / 13;
    grid-row: 4 / 13;
    z-index: 2;
    border-color: rgba(211, 47, 47, 0.2);
}

.about-experience-badge {
    position: absolute;
    bottom: 10%;
    left: 5%;
    background: var(--color-primary);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    z-index: 4;
    box-shadow: 0 15px 30px rgba(211, 47, 47, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.about-experience-badge span {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-white);
    line-height: 1;
}

.about-experience-badge label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255, 255, 255, 0.85);
    margin-top: 0.3rem;
}

.section-subtitle {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.section-subtitle::before {
    content: '';
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-primary);
}

.section-title {
    font-size: 2.8rem;
    margin-bottom: 2rem;
    font-weight: 800;
}

.about-text {
    font-size: 1.05rem;
    color: var(--color-gray-300);
    margin-bottom: 2rem;
}

.about-features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.about-feat-item {
    display: flex;
    gap: 1rem;
}

.about-feat-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: rgba(211, 47, 47, 0.1);
    border: 1px solid rgba(211, 47, 47, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.about-feat-info h5 {
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
    color: var(--color-white);
}

.about-feat-info p {
    font-size: 0.88rem;
    color: var(--color-gray-500);
}

/* ==========================================
   PRODUCTS SECTION (URUNLER)
   ========================================== */
.products {
    background: var(--color-gray-800);
    border-top: 1px solid rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

.products .section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.products .section-header .section-subtitle {
    justify-content: center;
}

.products .section-header .section-subtitle::after {
    content: '';
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-primary);
}

/* Tab Filter styling */
.product-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.tab-btn {
    padding: 0.8rem 1.8rem;
    border-radius: 30px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-300);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-gray-700);
    cursor: pointer;
    transition: var(--transition-normal);
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-white);
}

.tab-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    box-shadow: 0 4px 15px rgba(211, 47, 47, 0.3);
}

/* Product Cards Grid */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.product-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition-normal);
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: rgba(211, 47, 47, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.product-img-wrapper {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

.product-card:hover .product-img-wrapper img {
    transform: scale(1.08);
}

.product-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background: rgba(11, 11, 12, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    color: var(--color-white);
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.product-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-title {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: var(--color-white);
}

.product-desc {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.product-specs {
    margin-top: auto;
    border-top: 1px solid var(--color-gray-800);
    padding-top: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
}

.spec-label {
    color: var(--color-gray-500);
}

.spec-val {
    color: var(--color-gray-300);
    font-weight: 500;
}

.product-footer {
    margin-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-price-info {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    text-transform: uppercase;
}

.price-val {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-accent);
}

.product-cta-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-gray-800);
    border: 1px solid var(--color-gray-700);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.product-card:hover .product-cta-btn {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.1);
}

/* ==========================================
   WINPERAX DEALERSHIP SECTION (BAYILIK)
   ========================================== */
.winperax-section {
    background: linear-gradient(180deg, var(--color-dark-bg) 0%, rgba(211, 47, 47, 0.04) 100%);
    position: relative;
    overflow: hidden;
}

.winperax-section::before {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(211, 47, 47, 0.08) 0%, transparent 70%);
    filter: blur(40px);
}

.winperax-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 5rem;
    align-items: center;
}

.winperax-brand-panel {
    background: var(--color-card-bg);
    border: 1px solid rgba(211, 47, 47, 0.2);
    border-radius: 20px;
    padding: 3rem;
    position: relative;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.6);
}

.winperax-brand-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--color-gray-800);
    padding-bottom: 1.5rem;
}

.winperax-logo-title {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--color-white);
    letter-spacing: 0.1em;
    margin-bottom: 0.3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.winperax-logo-title span {
    color: var(--color-primary);
}

.winperax-tagline {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-gray-500);
    letter-spacing: 0.2em;
}

.winperax-cert-badge {
    position: absolute;
    top: 2rem;
    right: 2rem;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #d32f2f 0%, #7f0000 100%);
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 20px rgba(211, 47, 47, 0.3);
    text-align: center;
    padding: 0.5rem;
}

.winperax-cert-badge span {
    font-size: 0.55rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    line-height: 1.2;
}

.winperax-cert-badge span strong {
    font-size: 0.85rem;
    display: block;
    color: var(--color-white);
}

.winperax-perks {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.perk-item {
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
}

.perk-icon-wrapper {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(211, 47, 47, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    border: 1px solid rgba(211, 47, 47, 0.2);
}

.perk-details h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
    color: var(--color-white);
}

.perk-details p {
    font-size: 0.88rem;
    color: var(--color-gray-300);
}

.winperax-info h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.winperax-info p {
    font-size: 1.1rem;
    color: var(--color-gray-300);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.winperax-features-list {
    margin-bottom: 2.5rem;
}

.winperax-features-list li {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
    color: var(--color-gray-100);
    font-size: 0.95rem;
}

.winperax-features-list li svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ==========================================
   INTERACTIVE CALCULATOR (FİYAT HESAPLAMA)
   ========================================== */
.calculator {
    background: var(--color-gray-800);
    position: relative;
    border-top: 1px solid rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

.calculator .section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.calculator .section-header .section-subtitle {
    justify-content: center;
}

.calculator .section-header .section-subtitle::after {
    content: '';
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-primary);
}

.calc-container {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 24px;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
}

.calc-form-side {
    padding: 4rem;
}

.calc-group-title {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    color: var(--color-white);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.calc-group-title span {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Glass System Type Selector */
.system-type-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    margin-bottom: 2.5rem;
}

.system-type-card {
    background: var(--color-dark-bg);
    border: 2px solid var(--color-gray-800);
    border-radius: 12px;
    padding: 1.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
}

.system-type-card:hover {
    border-color: var(--color-gray-700);
    transform: translateY(-2px);
}

.system-type-card.selected {
    border-color: var(--color-primary);
    background: rgba(211, 47, 47, 0.05);
}

.system-card-icon {
    font-size: 2rem;
    color: var(--color-gray-500);
    margin-bottom: 0.8rem;
    transition: var(--transition-fast);
}

.system-type-card.selected .system-card-icon {
    color: var(--color-accent);
}

.system-card-title {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-gray-300);
}

.system-type-card.selected .system-card-title {
    color: var(--color-white);
}

/* Sliders and Dimensions */
.calc-sliders {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    margin-bottom: 2.5rem;
}

.slider-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.slider-label {
    font-size: 0.95rem;
    color: var(--color-gray-300);
    font-weight: 500;
}

.slider-value-display {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-accent);
}

/* Styled Range Input */
.calc-range-input {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--color-gray-800);
    outline: none;
    transition: background 0.3s;
}

.calc-range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(211, 47, 47, 0.5);
    transition: var(--transition-fast);
}

.calc-range-input::-webkit-slider-thumb:hover {
    background: var(--color-accent);
    transform: scale(1.15);
}

.slider-min-max {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--color-gray-500);
}

/* Glass color selection */
.glass-color-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.glass-color-card {
    background: var(--color-dark-bg);
    border: 1px solid var(--color-gray-800);
    border-radius: 8px;
    padding: 0.8rem;
    text-align: center;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.glass-color-card:hover {
    border-color: var(--color-gray-700);
}

.glass-color-card.selected {
    border-color: var(--color-primary);
    background: rgba(211, 47, 47, 0.05);
}

.glass-color-circle {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-color-card.selected .glass-color-circle {
    box-shadow: 0 0 8px currentColor;
}

.color-text {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-gray-300);
}

/* Result Side */
.calc-results-side {
    background: linear-gradient(135deg, rgba(211, 47, 47, 0.1) 0%, rgba(20, 20, 22, 0.95) 100%);
    border-left: 1px solid var(--color-card-border);
    padding: 4rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.calc-results-side::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: radial-gradient(circle at 100% 0%, rgba(211, 47, 47, 0.15) 0%, transparent 60%);
    z-index: 1;
    pointer-events: none;
}

.calc-summary-box {
    position: relative;
    z-index: 2;
}

.calc-summary-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 1rem;
    color: var(--color-white);
}

.summary-rows {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    margin-bottom: 3rem;
}

.summary-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.95rem;
}

.summary-label {
    color: var(--color-gray-300);
}

.summary-val {
    color: var(--color-white);
    font-weight: 600;
}

.summary-row.total-row {
    border-top: 1px dashed rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    margin-top: 0.5rem;
    align-items: flex-end;
}

.summary-row.total-row .summary-label {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-white);
}

.summary-row.total-row .summary-val {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
}

.calc-cta-box {
    position: relative;
    z-index: 2;
}

.calc-disclaimer {
    font-size: 0.75rem;
    color: var(--color-gray-500);
    margin-top: 1rem;
    text-align: center;
}

.calc-whatsapp-btn {
    width: 100%;
}

/* ==========================================
   PORTFOLIO GALLERY (GALERİ)
   ========================================== */
.gallery {
    background: var(--color-dark-bg);
}

.gallery .section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem auto;
}

.gallery .section-header .section-subtitle {
    justify-content: center;
}

.gallery .section-header .section-subtitle::after {
    content: '';
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-primary);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    height: 280px;
    cursor: pointer;
    border: 1px solid var(--color-card-border);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, transparent 40%, rgba(11, 11, 12, 0.9) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: var(--transition-normal);
}

.gallery-item:hover img {
    transform: scale(1.08);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 0.2rem;
}

.gallery-category {
    font-size: 0.8rem;
    color: var(--color-primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Lightbox styles */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 11, 12, 0.95);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 80vh;
    position: relative;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: 8px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: var(--color-white);
    font-size: 2rem;
    cursor: pointer;
    background: none;
    border: none;
}

.lightbox-close:hover {
    color: var(--color-primary);
}

/* ==========================================
   CONTACT SECTION (ILETISIM)
   ========================================== */
.contact {
    background: var(--color-gray-800);
    position: relative;
    border-top: 1px solid rgba(255, 255, 255, 0.02);
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 5rem;
}

.contact-info-panel {
    display: flex;
    flex-direction: column;
}

.contact-intro {
    font-size: 1.1rem;
    color: var(--color-gray-300);
    margin-bottom: 2.5rem;
}

.contact-details-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-detail-item {
    display: flex;
    gap: 1.2rem;
}

.contact-icon-box {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background: rgba(211, 47, 47, 0.1);
    border: 1px solid rgba(211, 47, 47, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
}

.contact-detail-info h4 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
    color: var(--color-white);
}

.contact-detail-info p {
    font-size: 0.95rem;
    color: var(--color-gray-300);
}

.contact-detail-info a:hover {
    color: var(--color-accent);
}

.map-container {
    height: 250px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--color-card-border);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}

.map-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    filter: invert(90%) hue-rotate(180deg) grayscale(85%) contrast(110%);
}

/* Contact Form */
.contact-form-panel {
    background: var(--color-card-bg);
    border: 1px solid var(--color-card-border);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 25px 50px rgba(0,0,0,0.4);
}

.contact-form-panel h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--color-white);
}

.contact-form-panel p {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    margin-bottom: 2rem;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-300);
}

.form-input, .form-select, .form-textarea {
    background: var(--color-dark-bg);
    border: 1px solid var(--color-gray-800);
    border-radius: 8px;
    padding: 0.9rem 1.2rem;
    color: var(--color-white);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.15);
}

.form-textarea {
    resize: none;
    height: 120px;
}

.form-btn {
    width: 100%;
}

.form-status {
    margin-top: 1rem;
    font-size: 0.9rem;
    border-radius: 6px;
    padding: 0.8rem 1rem;
    display: none;
}

.form-status.success {
    display: block;
    background: rgba(37, 211, 102, 0.1);
    border: 1px solid rgba(37, 211, 102, 0.3);
    color: #25d366;
}

.form-status.error {
    display: block;
    background: rgba(211, 47, 47, 0.1);
    border: 1px solid rgba(211, 47, 47, 0.3);
    color: var(--color-accent);
}

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--color-dark-bg);
    border-top: 1px solid var(--color-gray-800);
    padding: 5rem 0 2rem 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-gray-800);
    border: 1px solid var(--color-gray-700);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.social-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-3px);
}

.footer-col h4 {
    font-size: 1.1rem;
    color: var(--color-white);
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--color-primary);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-gray-500);
}

.footer-links a:hover {
    color: var(--color-white);
    padding-left: 5px;
}

.footer-contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.footer-contact-item {
    display: flex;
    gap: 0.8rem;
    font-size: 0.88rem;
    color: var(--color-gray-500);
}

.footer-contact-item svg {
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-800);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-copyright {
    font-size: 0.85rem;
    color: var(--color-gray-500);
}

.footer-bottom-links {
    display: flex;
    gap: 2rem;
    font-size: 0.85rem;
    color: var(--color-gray-500);
}

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

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
    100% { transform: translateY(0px); }
}

@keyframes pulse-glow {
    0% { transform: scale(1); opacity: 0.4; }
    100% { transform: scale(1.15); opacity: 0.7; }
}

/* ==========================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================== */
@media (max-width: 1200px) {
    .hero-title {
        font-size: 3.8rem;
    }
    .about-grid {
        gap: 3rem;
    }
}

@media (max-width: 1024px) {
    section {
        padding: 5rem 0;
    }
    .hero {
        height: auto;
        min-height: auto;
        padding-top: 120px;
        padding-bottom: 6rem;
    }
    .hero .container {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    .hero-bg-images {
        width: 100%;
        opacity: 0.4;
    }
    .hero-slide.active {
        opacity: 0.3;
    }
    .hero-visual {
        justify-content: flex-start;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    .about-images {
        max-width: 600px;
        margin: 0 auto;
        width: 100%;
    }
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .winperax-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    .calc-container {
        grid-template-columns: 1fr;
    }
    .calc-results-side {
        border-left: none;
        border-top: 1px solid var(--color-card-border);
    }
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 4rem;
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }
    .winperax-cert-badge  {
        top: 1.5rem;
        right: 1.5rem;
    }

    .winperax-info h2 {
     font-size: 2rem;
    }
    .about-features-grid {
        grid-template-columns: 1fr;
    }
    
    /* Navigation */
    .nav-toggle {
        display: flex;
    }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--color-card-bg);
        border-left: 1px solid var(--glass-border);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 4rem 3rem;
        gap: 2rem;
        transition: var(--transition-normal);
        z-index: 1050;
    }
    .nav-menu.active {
        right: 0;
    }
    .nav-actions {
        display: none; /* Hide action buttons in header on mobile */
    }
    
    /* Hero */
    .hero-title {
        font-size: 2.8rem;
    }
    .hero-description {
        font-size: 1.05rem;
    }
    
    /* Sections */
    .section-title {
        font-size: 2.2rem;
    }
    
    /* Products Grid */
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    /* Calculator Form */
    .calc-form-side {
        padding: 2.5rem 1.5rem;
    }
    .calc-results-side {
        padding: 2.5rem 1.5rem;
    }
    .system-type-grid {
        grid-template-columns: 1fr;
    }
    .calc-sliders {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .glass-color-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Contact Form Panel */
    .contact-form-panel {
        padding: 2.5rem 1.5rem;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    /* Footer bottom */
    .footer-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .footer-bottom-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.3rem;
    }
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .about-experience-badge {
        padding: 1rem 1.5rem;
    }
    .about-experience-badge span {
        font-size: 1.8rem;
    }
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}