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

html {
    overflow-x: hidden;
    width: 100%;
}

body {
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
    position: relative;
    font-family: 'Montserrat', sans-serif;
    background: var(--bg-body);
    color: var(--color-secondary);
    transition: background var(--transition-base), color var(--transition-base);
}

/* CSS Değişkenleri - Sevel Kurumsal Kimlik Renkleri */
:root {
    /* Sevel Marka Renkleri - Sarı & Siyah */
    --color-primary: #e8d306;
    --color-secondary: #171718;
    --color-white: #ffffff;
    --color-gray: #666666;
    --color-gray-light: #999999;
    --color-green: #28a745;
    --color-theme-bg: #fff9c4;
    
    /* Light Mode - Arkaplan Renkleri */
    --bg-body: #ffffff;
    --bg-header: rgba(0, 0, 0, 0.7);
    --bg-header-scrolled: rgba(0, 0, 0, 0.95);
    --bg-dropdown: rgba(0, 0, 0, 0.95);
    --bg-card: rgba(255, 255, 255, 0.05);
    
    
    /* Transparan Renkler */
    --white-05: rgba(255, 255, 255, 0.05);
    --white-1: rgba(255, 255, 255, 0.1);
    --white-3: rgba(255, 255, 255, 0.3);
    --white-7: rgba(255, 255, 255, 0.7);
    --black-3: rgba(0, 0, 0, 0.3);
    --black-5: rgba(0, 0, 0, 0.5);
    --black-7: rgba(0, 0, 0, 0.7);
    --yellow-1: rgba(232, 211, 6, 0.1);
    --yellow-2: rgba(232, 211, 6, 0.2);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --mgx-background :rgba(22, 22, 22, 0.336);
    
    /* Blur Değerleri */
    --blur-sm: 10px;
    --blur-md: 20px;
    --blur-lg: 30px;
    
    /* Geçişler */
    --transition-base: 0.3s ease;
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-body: #0a0a0a;
    --bg-header: rgba(0, 0, 0, 0.9);
    --bg-header-scrolled: rgba(0, 0, 0, 0.98);
    --bg-dropdown: rgba(10, 10, 10, 0.98);
    --bg-card: rgba(255, 255, 255, 0.03);
    --color-gray: #999999;
    --color-secondary: #ffffff;
}


.text-light {
    color: var(--color-white) !important;
}
.text-primary {
    color: var(--color-primary) !important;
}
.text-secondary {
    color: var(--color-secondary) !important;
}


/* Header & Navigation */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(24, 24, 23, 0.26);
    transition: all var(--transition-smooth);
    border-bottom: 1px solid var(--white-1);
}

header.scrolled {
    background: var(--bg-header-scrolled);
    box-shadow: 0 4px 30px var(--black-5), 0 0 1px var(--yellow-2);
    border-bottom-color: var(--color-primary);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 80px;
    max-width: 1600px;
    margin: 0 auto;
}

.logo {
    font-size: 36px;
    font-weight: 900;
    letter-spacing: 4px;
    color: var(--color-white);
    text-decoration: none;
    font-family: 'Playfair Display', serif;
}

.logo img {
    max-height: 40px;
}

.nav-links {
    display: flex;
    gap: 0;
    list-style: none;
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-links > .nav-item > a {
    color: var(--color-white);
    text-decoration: none;
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 500;
    padding: 12px 30px;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    transition: all 0.3s ease;
}

.nav-arrow {
    font-size: 10px;
    transition: transform 0.3s ease;
    display: inline-block;
}

.nav-item:hover .nav-arrow {
    transform: rotate(180deg);
}

.nav-links > .nav-item > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-white), transparent);
    transform: translateX(-50%);
    transition: width 0.4s ease;
}

.nav-links > .nav-item > a:hover::after {
    width: 80%;
}

/* Dropdown Menu */
.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(0, 0, 0, 0.85);
    min-width: 430px;
    max-width: 500px;
    padding: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-smooth);
    border: 1px solid var(--yellow-1);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px var(--black-7), 0 0 0 1px var(--white-05);
}

.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown a {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 20px;
    color: var(--white-7);
    text-decoration: none;
    font-size: 13px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: all var(--transition-base);
    position: relative;
    border-radius: var(--radius-sm);
}

.dropdown a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 0;
    background: var(--color-primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    transition: height var(--transition-base);
}

.dropdown a:hover {
    color: var(--color-primary);
    background: var(--yellow-1);
    padding-left: 30px;
}

.dropdown a:hover::before {
    height: 100%;
}

.dropdown-icon {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.dropdown a:hover .dropdown-icon {
    transform: translateX(5px) scale(1.2);
}

/* Language Selector */
.language-selector {
    position: relative;
    margin-left: 20px;
}

.language-selector .nav-item > a {
    display: flex;
    align-items: center;
    gap: 8px;
}

.language-selector .current-lang {
    font-size: 20px;
}

.language-selector .dropdown {
    min-width: 200px;
}

.language-selector .dropdown a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
}

.language-selector .dropdown .lang-flag {
    font-size: 10px;
    width: 14px;
    text-align: center;
}

.language-selector .dropdown .lang-name {
    flex: 1;
}

/* Hamburger Menu */
.hamburger-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
    padding: 8px;
}

.hamburger-menu span {
    width: 28px;
    height: 3px;
    background: var(--color-white);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translateY(11px);
}

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

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-11px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background:
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
}

/* Video Banner Section */
.video-banner {
    position: relative;
    height: 100vh;
    overflow: hidden;
    margin-bottom: 1rem;
    border-bottom: 17px;
    border-radius: 0px 0px 15px 15px;
}

.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.5) contrast(1.1);
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(0,0,0,0.7) 0%, 
        rgba(232,211,6,0.08) 50%, 
        rgba(0,0,0,0.6) 100%);
    animation: overlay-pulse 10s ease-in-out infinite;
}

@keyframes overlay-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.9; }
}

.slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
}

.slide.active {
    opacity: 1;
}

.slide-content {
    position: absolute;
    z-index: 10;
    width: auto;
    max-width: 650px;
    opacity: 0;
    transition: opacity 1s ease;
    padding: var(--radius-xl);
    background: var(--mgx-background);
    border: 1px solid var(--white-1);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px var(--black-5);
}

.slide-content.bottom-right {
    bottom: 80px;
    right: 80px;
}

.slide-content.bottom-left {
    bottom: 80px;
    left: 80px;
    text-align: left;
}

.slide.active .slide-content {
    opacity: 1;
}

.slide-content h3 {
    font-size: 45px;
    font-weight: 600;
    letter-spacing: 15px;
    margin-bottom: 30px;
    line-height: 1;
    text-transform: uppercase;
    font-family: 'Playfair Display', serif;
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGlow 3s ease-in-out infinite alternate;
    text-shadow: 0 0 80px rgba(255, 255, 255, 0.3);
}

@keyframes titleGlow {
    from {
        filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.3));
    }
    to {
        filter: drop-shadow(0 0 40px rgba(255, 255, 255, 0.6));
    }
}

.slide-content .tagline {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 4px;
    margin-bottom: 15px;
    text-transform: uppercase;
    color: var(--color-primary);
    text-shadow: 0 0 20px var(--yellow-2);
    padding: 8px 16px;
    background: var(--yellow-1);
    border-radius: var(--radius-sm);
    display: inline-block;
}

.slide-content .subtitle {
    font-size: 32px;
    font-weight: 300;
    letter-spacing: 3px;
    margin-bottom: 50px;
    font-family: 'Montserrat', sans-serif;
    line-height: 1.6;
    color: var(--color-gray);
}

.cta-buttons {
    display: flex;
    gap: 30px;
    justify-content: center;
}

.cta-button {
    display: inline-block;
    padding: 16px 40px;
    background: var(--color-primary);
    border: 2px solid var(--color-primary);
    color: var(--color-secondary);
    text-decoration: none;
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 600;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 15px var(--yellow-2);
}

.cta-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-secondary);
    transition: left var(--transition-smooth);
    z-index: -1;
}

.cta-button:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--yellow-2), 0 0 0 3px var(--yellow-1);
}

.cta-button:hover::before {
    left: 0;
}

.cta-button.secondary {
    background: transparent;
    border-color: var(--color-white);
    color: var(--color-white);
    background: var(--mgx-background);
}

.cta-button.secondary:hover {
    background: var(--white-1);
    color: var(--color-primary);
}

.scroll-indicator {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    width: 32px;
    height: 55px;
    border: 2px solid var(--white-3);
    border-radius: var(--radius-xl);
    cursor: pointer;
    animation: float 3s ease-in-out infinite;
    transition: all var(--transition-base);
    background: var(--mgx-background);
}

.scroll-indicator:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 20px var(--yellow-2);
    background: var(--black-5);
}

.scroll-indicator::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 10px;
    background: var(--color-white);
    border-radius: 3px;
    animation: scroll 2s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-15px); }
}

@keyframes scroll {
    0% { opacity: 1; top: 10px; }
    100% { opacity: 0; top: 30px; }
}

@keyframes zoomIn {
    from {
        transform: scale(1);
    }
    to {
        transform: scale(1.2);
    }
}

/* Dark Mode Toggle Button */
.theme-toggle {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: var(--mgx-background);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-primary);
    z-index: 999;
    transition: all var(--transition-base);
    box-shadow: 0 4px 20px var(--yellow-2);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 6px 30px var(--yellow-2);
}

/* Responsive */
@media (max-width: 768px) {
    header {
        padding: 0;
        background: var(--bg-header-scrolled);
        border-bottom: 1px solid var(--color-primary);
    }

    nav {
        padding: 8px 20px;
    }

    .logo img {
        max-height: 30px;
    }

    .hamburger-menu {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 56px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 56px);
        background: var(--bg-header-scrolled);
        flex-direction: column;
        padding: 30px 20px;
        gap: 0;
        transition: left 0.3s ease;
        overflow-y: auto;
        z-index: 1000;
    }

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

    .nav-links > .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--white-1);
    }

    .nav-links > .nav-item > a {
        width: 100%;
        justify-content: space-between;
    }

    .nav-links > .nav-item > a::after {
        display: none;
    }

    .dropdown {
        position: static;
        transform: none;
        opacity: 0;
        visibility: hidden;
        max-height: 0;
        overflow: hidden;
        background: var(--black-5);
        border: none;
        border-radius: 0;
        box-shadow: none;
        padding: 0;
        margin: 0;
        transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
    }

    .nav-item.active .dropdown {
        opacity: 1;
        visibility: visible;
        max-height: 500px;
        padding: 10px 0;
    }

    .dropdown a {
        padding: 12px 20px;
    }

    .language-selector .dropdown {
        min-width: auto;
    }

    .nav-item.active .nav-arrow {
        transform: rotate(180deg);
    }

    .slide-content {
        max-width: 90%;
        padding: 20px;
        border-radius: var(--radius-lg);
    }

    .slide-content.bottom-right,
    .slide-content.bottom-left {
        bottom: 20px !important;
        right: 5% !important;
        left: 5% !important;
        text-align: center;
    }

    .slide-content .tagline {
        font-size: 11px;
        letter-spacing: 2px;
    }

    .slide-content .subtitle {
        font-size: 16px;
        letter-spacing: 1px;
        margin-bottom: 25px;
    }

    .cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .theme-toggle {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
}
@media(min-width: 993px) {
  .header-area{
    display: none;
  }
  #header{
    display: block;
  }
}
@media(max-width: 992px) {
  #header{
    display: none;
  }
  .header-area{
    display: block;
  }
}