/* ═══════════════════════════════════════════════════════════
   HEADER & NAVIGATION
   ═══════════════════════════════════════════════════════════ */

/* ── Top Bar ──────────────────────────────────────────────── */
.top-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: calc(var(--z-header) + 1);
    background: var(--color-accent);
    color: var(--color-primary);
    text-align: center;
    padding: 6px 0;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: var(--font-heading);
    letter-spacing: 0.02em;
    font-style: italic;
}

.top-bar__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--container-padding);
}

/* ── Header ───────────────────────────────────────────────── */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-header);
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.header--scrolled {
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 191, 255, 0.1);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 120px;
}

/* ── Logo ─────────────────────────────────────────────────── */
.header__logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.header__logo-img {
    height: 130px;
    width: auto;
    transition: transform var(--transition-fast);
}

.header__logo:hover .header__logo-img {
    transform: scale(1.03);
}

/* ── Navigation ───────────────────────────────────────────── */
.header__nav {
    display: flex;
    align-items: center;
}

.header__nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
}

.header__nav-link {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 8px 16px;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-white);
    letter-spacing: 0.01em;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-shadow: 0 1px 6px rgba(0, 0, 0, 0.75);
}

.header__nav-link:hover,
.header__nav-link--active {
    color: var(--color-accent);
}

.header__nav-link--active {
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-thickness: 2px;
}

.header__dropdown-icon {
    font-size: 0.6rem;
    transition: transform var(--transition-fast);
}

/* ── Dropdown ─────────────────────────────────────────────── */
.header__nav-item--dropdown {
    position: relative;
}

.header__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: rgba(10, 22, 40, 0.97);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 191, 255, 0.15);
    border-radius: var(--radius-md);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
}

.header__nav-item--dropdown:hover .header__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header__nav-item--dropdown:hover .header__dropdown-icon {
    transform: rotate(180deg);
}

.header__dropdown-link {
    display: block;
    padding: 10px 20px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--color-gray-300);
    transition: all var(--transition-fast);
}

.header__dropdown-link:hover {
    color: var(--color-accent);
    background: rgba(0, 191, 255, 0.05);
    padding-left: 24px;
}

/* ── Nested Sub-dropdown ──────────────────────────────────── */
.header__dropdown-item--has-sub {
    position: relative;
}

.header__dropdown-item--has-sub > .header__dropdown-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header__subdropdown-icon {
    font-size: 0.55rem;
    margin-left: 12px;
    transition: transform var(--transition-fast);
}

.header__subdropdown {
    position: absolute;
    top: 0;
    left: 100%;
    min-width: 200px;
    background: rgba(10, 22, 40, 0.97);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 191, 255, 0.15);
    border-radius: var(--radius-md);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateX(8px);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
}

.header__dropdown-item--has-sub:hover > .header__subdropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.header__dropdown-item--has-sub:hover > .header__dropdown-link {
    color: var(--color-accent);
    background: rgba(0, 191, 255, 0.05);
}

.header__dropdown-item--has-sub:hover .header__subdropdown-icon {
    transform: translateX(3px);
}

/* ── Header Right (CTA + Socials) ─────────────────────────── */
.header__right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header__cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: url('/static/images/button/bg/button-bg.png') center/cover no-repeat;
    border: 1.5px solid rgba(0, 191, 255, 0.4);
    border-radius: var(--radius-pill);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
}

.header__cta-btn:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.header__cta-icon {
    display: flex;
    align-items: center;
    color: var(--color-accent);
    font-size: 0.8rem;
    transition: color var(--transition-fast);
}

.header__cta-btn:hover .header__cta-icon {
    color: var(--color-primary);
}

.header__socials {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    padding: 6px 10px;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.header__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--color-white);
    font-size: 0.85rem;
    transition: color var(--transition-fast), filter var(--transition-fast);
    filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.75));
}

.header__social-link:hover {
    color: var(--color-accent);
    filter: drop-shadow(0 0 6px rgba(0, 191, 255, 0.6));
}

/* ── Mobile Toggle ────────────────────────────────────────── */
.header__mobile-toggle {
    display: none;
    width: 32px;
    height: 24px;
    position: relative;
    z-index: calc(var(--z-mobile-menu) + 10);
}

.header__hamburger,
.header__hamburger::before,
.header__hamburger::after {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.header__hamburger {
    position: relative;
}

.header__hamburger::before,
.header__hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

.header__hamburger::before {
    top: -8px;
}

.header__hamburger::after {
    top: 8px;
}

/* Hamburger → X */
.header__mobile-toggle.active .header__hamburger {
    background: transparent;
}

.header__mobile-toggle.active .header__hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.header__mobile-toggle.active .header__hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* ── Mobile Menu Overlay ──────────────────────────────────── */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(16px);
    z-index: var(--z-mobile-menu);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
}

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

.mobile-menu__nav {
    text-align: center;
}

.mobile-menu__list {
    margin-bottom: 32px;
}

.mobile-menu__link {
    display: block;
    padding: 14px 0;
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-white);
    transition: color var(--transition-fast);
}

.mobile-menu__link:hover {
    color: var(--color-accent);
}

.mobile-menu__sub {
    padding: 4px 0 8px;
}

.mobile-menu__sub a {
    display: block;
    padding: 8px 0;
    font-family: var(--font-heading);
    font-size: 1rem;
    color: var(--color-gray-300);
    transition: color var(--transition-fast);
}

.mobile-menu__sub a:hover {
    color: var(--color-accent);
}

.mobile-menu__sub {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.mobile-menu__item--has-sub.open .mobile-menu__sub {
    max-height: 400px;
}

.mobile-menu__cta {
    display: inline-block;
    padding: 14px 36px;
    background: var(--color-accent);
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    border-radius: var(--radius-pill);
    margin-bottom: 24px;
    transition: all var(--transition-base);
}

.mobile-menu__cta:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.mobile-menu__socials {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.mobile-menu__socials a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.mobile-menu__socials a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ── Mobile Menu Header (Logo + Close) ────────────────────── */
.mobile-menu__header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
}

.mobile-menu__logo img {
    height: 70px;
    width: auto;
}

.mobile-menu__close {
    position: relative;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.mobile-menu__close:hover {
    background: rgba(0, 191, 255, 0.15);
    border-color: var(--color-accent);
}

.mobile-menu__close span {
    display: block;
    position: absolute;
    width: 18px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    top: 50%;
    left: 50%;
    transition: background var(--transition-fast);
}

.mobile-menu__close span:first-child {
    transform: translate(-50%, -50%) rotate(45deg);
}

.mobile-menu__close span:last-child {
    transform: translate(-50%, -50%) rotate(-45deg);
}

.mobile-menu__close:hover span {
    background: var(--color-accent);
}