/* ============================================
   ALPHA FINANS DATA - Header Component
   Landing sayfası üst navigasyon
   ============================================ */

/* === HEADER WRAPPER === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: var(--z-header);
    background: var(--color-bg-header);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition:
        background var(--transition-normal),
        border-color var(--transition-normal),
        box-shadow var(--transition-normal);
}

.header.scrolled {
    border-bottom-color: var(--color-border-primary);
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-wide);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* === LOGO === */
.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    flex-shrink: 0;
}

.header-logo img {
    height: 36px;
    width: 36px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.header-logo-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    white-space: nowrap;
}

.header-logo-text span {
    color: var(--color-accent-primary);
}

/* === NAVIGATION === */
.header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--color-text-primary);
    background: var(--color-accent-glow);
}

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

/* Dropdown arrow */
.nav-link svg.chevron {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
    opacity: 0.6;
}

.nav-item.open .nav-link svg.chevron {
    transform: rotate(180deg);
}

.nav-item.open .nav-link {
    color: var(--color-accent-primary);
    background: var(--color-accent-glow);
}

/* === MEGA DROPDOWN === */
.mega-dropdown {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-lg);
    min-width: 520px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
        opacity var(--transition-fast),
        visibility var(--transition-fast),
        transform var(--transition-fast);
    transform: translateX(-50%) translateY(8px);
}

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

/* Dropdown pointer */
.mega-dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border-primary);
    border-left: 1px solid var(--color-border-primary);
}

/* Invisible bridge between nav-link and dropdown */
.mega-dropdown::after {
    content: '';
    position: absolute;
    top: -16px;
    left: 0;
    right: 0;
    height: 16px;
}

/* Dropdown header link */
.dropdown-header-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    border-bottom: 1px solid var(--color-border-secondary);
    padding-bottom: var(--spacing-md);
}

.dropdown-header-link:hover {
    background: var(--color-accent-glow);
    color: var(--color-accent-secondary);
}

.dropdown-header-link svg {
    width: 18px;
    height: 18px;
}

/* Dropdown columns layout */
.dropdown-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

/* Dropdown section */
.dropdown-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.dropdown-section-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: var(--spacing-xs) var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.dropdown-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 10px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.dropdown-link:hover {
    color: var(--color-text-primary);
    background: var(--color-accent-glow);
    transform: translateX(2px);
}

.dropdown-link svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    opacity: 0.5;
}

.dropdown-link:hover svg {
    opacity: 1;
    color: var(--color-accent-primary);
}

/* Geniş dropdown - Piyasalar 4 kolon */
.mega-dropdown.dropdown-wide {
    min-width: 720px;
}

.dropdown-4col {
    grid-template-columns: repeat(4, 1fr) !important;
}

/* Flag ikonları */
.dropdown-link .fi,
.mobile-submenu .fi {
    width: 20px;
    min-width: 20px;
    line-height: 1;
    border-radius: 2px;
}

/* Destek dropdown - daha dar */
.mega-dropdown.dropdown-sm {
    min-width: 280px;
}

.mega-dropdown.dropdown-sm .dropdown-columns {
    grid-template-columns: 1fr;
}

@media (max-width: 1200px) {
    .mega-dropdown.dropdown-wide {
        min-width: 560px;
    }
    .dropdown-4col {
        grid-template-columns: repeat(2, 1fr) !important;
    }
}

/* === HEADER SAĞ TARAF === */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

/* Tema toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.theme-toggle:hover {
    color: var(--color-accent-primary);
    background: var(--color-accent-glow);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.theme-toggle .icon-sun,
[data-theme="light"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: block;
}

/* Auth buttons */
.btn-login {
    padding: 8px 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-login:hover {
    color: var(--color-text-primary);
    background: var(--color-hover-subtle);
}

.btn-register {
    padding: 8px 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-inverse);
    background: var(--gradient-accent);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.btn-register:hover {
    background: var(--gradient-accent-hover);
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

/* === MOBILE HAMBURGER === */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile-toggle:hover {
    background: var(--color-accent-glow);
}

.mobile-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-secondary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* === MOBILE MENU === */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-secondary);
    z-index: var(--z-overlay);
    overflow-y: auto;
    padding: var(--spacing-lg);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

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

.mobile-nav-item {
    border-bottom: 1px solid var(--color-border-secondary);
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-sm);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.mobile-nav-link svg {
    width: 18px;
    height: 18px;
    transition: transform var(--transition-fast);
    color: var(--color-text-muted);
}

.mobile-nav-item.open .mobile-nav-link svg {
    transform: rotate(180deg);
}

.mobile-submenu {
    display: none;
    padding: 0 var(--spacing-sm) var(--spacing-md);
}

.mobile-nav-item.open .mobile-submenu {
    display: block;
}

.mobile-section-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: var(--spacing-sm) var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.mobile-submenu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
}

.mobile-submenu a:hover {
    color: var(--color-accent-primary);
    background: var(--color-accent-glow);
}

.mobile-auth {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border-secondary);
}

.mobile-auth .btn {
    width: 100%;
    justify-content: center;
    padding: 14px;
    font-size: var(--font-size-md);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .header-nav,
    .header-actions .btn-login,
    .header-actions .btn-register {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }
}

@media (max-width: 480px) {
    .header-inner {
        padding: 0 var(--spacing-md);
    }

    .header-logo-text {
        font-size: var(--font-size-base);
    }
}