/* ==========================================================================
   Header Navigation & Responsive Drawer Component
   Crypto Sphere Design System
   ========================================================================== */

.header-fintech {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--header-border);
    transition: all 0.2s ease;
}

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

.nav-wrapper-fintech {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    width: 100%;
    box-sizing: border-box;
}

.brand-link-fintech {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.12rem;
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

.brand-logo-img {
    width: 38px;
    height: 25px;
    object-fit: contain;
    display: block;
    flex-shrink: 0;
    transition: transform 0.2s ease, filter 0.2s ease;
}

.brand-link-fintech:hover .brand-logo-img {
    transform: scale(1.04);
}

html[data-theme="light"] .brand-logo-img,
html[data-theme="light"] .logo-mark {
    filter: invert(1);
}

/* Desktop Navigation Menu (Active for >= 1180px) */
.nav-menu-fintech {
    display: flex;
    align-items: center;
    gap: clamp(10px, 1.25vw, 18px);
    list-style: none;
    white-space: nowrap;
    margin: 0;
    padding: 0;
}

.nav-item-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    transition: color 0.15s ease;
    padding: 6px 2px;
    position: relative;
    letter-spacing: -0.01em;
}

.nav-item-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-orange);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.nav-item-link:hover::after,
.nav-item-link.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-gallery-badge-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.nav-external-arrow {
    font-size: 0.75rem;
    color: var(--accent-orange);
    transition: transform 0.15s ease;
}

.nav-gallery-badge-link:hover .nav-external-arrow {
    transform: translate(2px, -2px);
}

/* Navigation Actions Right Strip */
.nav-actions-fintech {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.btn-theme-toggle {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: transparent;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
    padding: 0;
    flex-shrink: 0;
}

.btn-theme-toggle:hover {
    color: var(--text-primary);
    border-color: var(--border-color);
    background: var(--bg-surface-elevated);
}

.btn-theme-toggle .theme-icon-sun {
    display: none;
}
.btn-theme-toggle .theme-icon-moon {
    display: block;
}

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

.btn-nav-login {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 10px;
    white-space: nowrap;
    transition: color 0.15s ease;
}

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

.mobile-nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.mobile-nav-toggle:hover {
    background: var(--bg-surface-elevated);
    border-color: var(--border-color);
}

/* ==========================================================================
   Responsive Collapse Threshold (< 1180px)
   Guarantees Zero Collision with Action Buttons
   ========================================================================== */
@media (max-width: 1180px) {
    .header-fintech nav,
    .nav-menu-fintech,
    .btn-nav-login {
        display: none !important;
    }

    .mobile-nav-toggle {
        display: inline-flex !important;
    }
}

@media (max-width: 768px) {
    .header-fintech {
        height: 58px;
    }
    .nav-wrapper-fintech {
        height: 58px;
    }
    .header-fintech .btn-theme-toggle {
        display: none !important;
    }
}