/* ===== Header / Üst Menü ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    z-index: var(--z-sticky);
    transition: var(--transition);
}

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

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: var(--font-extrabold);
    color: var(--dark);
}

.logo-img {
    height: 56px;
    width: auto;
    object-fit: contain;
}

.logo i {
    color: var(--primary);
    font-size: 1.25rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: var(--font-medium);
    color: var(--gray-600);
    transition: var(--transition);
    position: relative;
}

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

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

.nav-links a:hover::after {
    width: 100%;
}

/* Dropdown Menu */
.nav-dropdown {
    position: relative;
}

.nav-dropdown .dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-weight: var(--font-medium);
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    padding: 0.5rem 0;
}

.nav-dropdown .dropdown-toggle:hover {
    color: var(--primary);
}

.nav-dropdown .dropdown-toggle i {
    font-size: 0.625rem;
    transition: transform 0.2s ease;
}

.nav-dropdown:hover .dropdown-toggle i {
    transform: rotate(180deg);
}

.nav-dropdown .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    margin-top: 0;
    min-width: 220px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.2s ease;
    z-index: 1000;
    padding: 0.5rem 0;
}

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

.nav-dropdown .dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: var(--white);
    box-shadow: -2px -2px 4px rgba(0, 0, 0, 0.05);
}

.nav-dropdown .dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.25rem;
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--gray-700);
    transition: all 0.15s ease;
}

.nav-dropdown .dropdown-menu a::after {
    display: none;
}

.nav-dropdown .dropdown-menu a:hover {
    background: var(--primary-bg);
    color: var(--primary);
}

.nav-dropdown .dropdown-menu a i {
    width: 18px;
    text-align: center;
    color: var(--gray-400);
    transition: color 0.15s ease;
}

.nav-dropdown .dropdown-menu a:hover i {
    color: var(--primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.search-box:focus-within {
    background: var(--white);
    box-shadow: 0 0 0 2px var(--primary-bg);
}

.search-box input {
    border: none;
    background: none;
    outline: none;
    width: 140px;
    font-size: 0.8125rem;
}

.search-box i {
    color: var(--gray-400);
    font-size: 0.875rem;
}

/* Notification Button */
.btn-notification {
    position: relative;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    color: var(--gray-600);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.btn-notification:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.notification-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    font-size: 0.5625rem;
    font-weight: var(--font-bold);
    color: var(--white);
    background: var(--error);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    font-size: 1.125rem;
    color: var(--gray-700);
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    color: var(--primary);
}

/* ===== Hero Section ===== */
.hero {
    padding-top: calc(var(--header-height) + var(--spacing-lg));
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, #0066FF 0%, #0052CC 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

/* Subtle background pattern */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: var(--font-extrabold);
    color: var(--white);
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 0.9375rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

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

.hero-cta .btn-primary {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
}

.hero-cta .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    animation: fadeInUp 0.8s ease-out 0.5s both;
}

.stat {
    text-align: center;
    padding: 0 var(--spacing-lg);
}

.stat:not(:last-child) {
    border-right: 1px solid rgba(255, 255, 255, 0.15);
}

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

.stat-number {
    display: block;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: var(--font-extrabold);
    line-height: 1.1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

/* ===== Footer / Alt Menü ===== */
.footer {
    background: var(--dark);
    color: var(--gray-400);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

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

.footer-brand .logo-img {
    height: 28px;
    filter: brightness(0) invert(1);
}

.footer-brand p {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    margin-bottom: var(--spacing-lg);
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    font-size: var(--font-size-lg);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: var(--white);
}

.footer-links h4 {
    font-size: var(--font-size-base);
    font-weight: var(--font-semibold);
    color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    font-size: var(--font-size-sm);
    transition: var(--transition);
}

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

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: var(--font-size-sm);
}

.footer-bottom .disclaimer {
    margin-top: var(--spacing-sm);
    font-size: var(--font-size-xs);
    opacity: 0.7;
}

/* ===== Mobile Menu / Mobil Menü ===== */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 320px;
    height: 100vh;
    height: 100dvh;
    background: var(--white);
    z-index: var(--z-modal);
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.mobile-menu-header .logo {
    font-size: 1.125rem;
}

.close-menu {
    width: 44px;
    height: 44px;
    font-size: 1.25rem;
    color: var(--gray-500);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
    transition: var(--transition-fast);
}

.close-menu:hover,
.close-menu:active {
    background: var(--gray-100);
    color: var(--gray-700);
}

/* Mobile Search */
.mobile-search {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--gray-100);
}

.mobile-search-input {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1rem;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
}

.mobile-search-input:focus-within {
    background: var(--white);
    box-shadow: 0 0 0 2px var(--primary);
}

.mobile-search-input input {
    flex: 1;
    border: none;
    background: none;
    outline: none;
    font-size: 1rem;
    color: var(--gray-800);
}

.mobile-search-input input::placeholder {
    color: var(--gray-400);
}

.mobile-search-input i {
    color: var(--gray-400);
    font-size: 1rem;
}

.mobile-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
}

.mobile-nav a {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.875rem var(--spacing-lg);
    font-size: 1rem;
    font-weight: var(--font-medium);
    color: var(--gray-700);
    transition: all 0.15s ease;
}

.mobile-nav a i {
    width: 24px;
    text-align: center;
    color: var(--gray-400);
    font-size: 1.125rem;
}

.mobile-nav a:hover,
.mobile-nav a:active {
    background: var(--primary-bg);
    color: var(--primary);
}

.mobile-nav a:hover i,
.mobile-nav a:active i {
    color: var(--primary);
}

.mobile-nav-divider {
    height: 1px;
    background: var(--gray-100);
    margin: var(--spacing-sm) var(--spacing-lg);
}

.mobile-nav-label {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.6875rem;
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--gray-400);
}

.mobile-social {
    padding: var(--spacing-lg);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.mobile-social a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: var(--radius);
    font-size: 1.25rem;
    color: var(--gray-500);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.mobile-social a:hover,
.mobile-social a:active {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.mobile-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

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

/* ===== Back to Top / Yukarı Git ===== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-full);
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: var(--z-dropdown);
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 102, 255, 0.4);
}