/* ==========================================================================
   Yıldırımer Lift Asansör - Premium Design System (style.css)
   ========================================================================== */

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

:root {
    --bg-dark: #0a0a0a;
    --bg-card: #121212;
    --bg-card-hover: #1a1a1a;
    --primary: #d4a017;
    --primary-light: #f0c040;
    --primary-dark: #b8860b;
    --text-white: #ffffff;
    --text-muted: #a0a0a0;
    --text-gray: #707070;
    --border-color: rgba(212, 160, 23, 0.15);
    --border-hover: rgba(212, 160, 23, 0.3);
    --glass-bg: rgba(18, 18, 18, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-white);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.2;
}

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

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #050505;
}
::-webkit-scrollbar-thumb {
    background: var(--primary-dark);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

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

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

.gold-gradient-bg {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
}

.section-padding {
    padding: 100px 0;
}

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

.section-title span {
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--primary);
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
}

.section-title h2 {
    font-size: 42px;
    font-weight: 800;
    letter-spacing: -1px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-family: var(--font-heading);
    font-weight: 600;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    font-size: 15px;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: #000;
    border: none;
    box-shadow: 0 4px 15px rgba(212, 160, 23, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(212, 160, 23, 0.5);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
}

.btn-secondary {
    background: transparent;
    color: var(--text-white);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(212, 160, 23, 0.05);
    border-color: var(--primary);
    transform: translateY(-3px);
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-dark);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

.loader-logo {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: 20px;
    letter-spacing: 1px;
}

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

.loader-bar {
    width: 200px;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    border-radius: 2px;
}

.loader-bar-fill {
    width: 0;
    height: 100%;
    background: var(--primary);
    position: absolute;
    top: 0;
    left: 0;
    animation: loader-fill 2s infinite ease-in-out;
}

@keyframes loader-fill {
    0% { width: 0; left: 0; }
    50% { width: 100%; left: 0; }
    100% { width: 0; left: 100%; }
}

/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

header.sticky {
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    padding: 10px 0;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    transition: var(--transition);
}

header.sticky .header-container {
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
    color: var(--primary);
    position: relative;
}

.logo-text {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 20px;
    letter-spacing: -0.5px;
    line-height: 1.1;
}

.logo-text span {
    display: block;
    font-size: 10px;
    font-weight: 400;
    letter-spacing: 2px;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
    list-style: none;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-white);
    position: relative;
    padding: 10px 0;
}

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

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-btn {
    padding: 10px 20px;
    font-size: 14px;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    border: none;
    background: transparent;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background-color: var(--text-white);
    transition: var(--transition);
}

/* Hero Slider */
.hero-slider {
    position: relative;
    height: 100vh;
    overflow: hidden;
    background: #000;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, visibility 1s ease-in-out;
    display: flex;
    align-items: center;
    z-index: 1;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 2;
}

.slide-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transform: scale(1.1);
    transition: transform 6s ease;
}

.slide.active .slide-bg {
    transform: scale(1);
}

.slide::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.9) 30%, rgba(0, 0, 0, 0.4) 100%);
}

.slide-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
}

.slide h1 {
    font-size: 64px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -1.5px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.5s;
}

.slide p {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.7s;
}

.slide-btns {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease 0.9s;
    display: flex;
    gap: 15px;
}

.slide.active h1,
.slide.active p,
.slide.active .slide-btns {
    opacity: 1;
    transform: translateY(0);
}

.slider-controls {
    position: absolute;
    bottom: 40px;
    right: 40px;
    z-index: 10;
    display: flex;
    gap: 10px;
}

.slider-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.5);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.slider-btn:hover {
    background: var(--primary);
    color: #000;
    border-color: var(--primary);
}

/* Service Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, var(--primary-dark), var(--primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--border-hover);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    background: var(--bg-card-hover);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 25px;
    display: inline-block;
}

.service-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

.service-card p {
    color: var(--text-muted);
    font-size: 15px;
    margin-bottom: 25px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--primary);
    font-size: 14px;
}

.service-link i {
    transition: var(--transition);
}

.service-card:hover .service-link i {
    transform: translateX(5px);
}

/* Stats Section */
.stats-section {
    background: linear-gradient(rgba(10, 10, 10, 0.95), rgba(10, 10, 10, 0.95)), url('../images/stats-bg.jpg') no-repeat center center/cover;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item i {
    font-size: 40px;
    color: var(--primary);
    margin-bottom: 20px;
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text-white);
}

.stat-item p {
    color: var(--text-muted);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Projects Section */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-white);
    padding: 10px 20px;
    border-radius: 30px;
    cursor: pointer;
    font-weight: 500;
    font-size: 14px;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary);
    color: #000;
    border-color: var(--primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

.project-img-wrapper {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: #111;
}

.project-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover .project-img-wrapper img {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-info {
    padding: 25px;
}

.project-category {
    font-size: 12px;
    color: var(--primary);
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 5px;
    display: block;
}

.project-info h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.project-info p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 20px;
}

/* Floating Elements */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #25d366;
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    z-index: 999;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.5);
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    z-index: 1001;
    width: 0;
    transition: width 0.1s ease-out;
}

/* Footer */
footer {
    background-color: #050505;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 14px;
}

.footer-top {
    padding: 80px 0 50px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr 1.8fr;
    gap: 40px;
}

.footer-logo {
    margin-bottom: 25px;
}

.footer-logo .logo-text {
    font-size: 24px;
}

.footer-col h4 {
    color: var(--text-white);
    font-size: 18px;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

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

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

.footer-links li {
    margin-bottom: 12px;
}

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

.footer-contact li {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.footer-contact i {
    color: var(--primary);
    font-size: 16px;
    margin-top: 4px;
}

.footer-map {
    height: 150px;
    border-radius: 8px;
    overflow: hidden;
    margin-top: 15px;
    border: 1px solid var(--border-color);
}

.social-links {
    display: flex;
    gap: 10px;
    margin-top: 25px;
}

.social-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.social-btn:hover {
    background-color: var(--primary);
    color: #000;
    border-color: var(--primary);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 30px 0;
}

.footer-bottom-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

/* Modal Popup */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    max-width: 600px;
    width: 90%;
    padding: 40px;
    position: relative;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--text-white);
    font-size: 20px;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Cookie / KVKK Popup Banner */
.cookie-banner {
    position: fixed;
    bottom: 30px;
    left: 30px;
    max-width: 400px;
    background: rgba(18, 18, 18, 0.95);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    z-index: 1999;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    gap: 15px;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
}

.cookie-banner.active {
    transform: translateY(0);
    opacity: 1;
}

/* Responsive Table / Form / Grid Adjustments */
@media (max-width: 991px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    
    .section-title h2 {
        font-size: 34px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-dark);
        flex-direction: column;
        align-items: center;
        padding-top: 50px;
        transition: var(--transition);
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .header-btn {
        display: none;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .slide h1 {
        font-size: 40px;
    }
}