/**
 * OGA Header Styles
 * Shared navigation header for all public pages
 * Uses oga-common.css variables when available, with fallbacks
 */

/* ===== HEADER CONTAINER ===== */
.oga-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--oga-bg-dark, #2d2929);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

.oga-header *,
.oga-header *::before,
.oga-header *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.oga-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

/* ===== LOGO ===== */
.oga-header-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.oga-header-logo img {
    height: 42px;
    width: auto;
}

/* ===== HAMBURGER TOGGLE ===== */
.oga-header-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.oga-header-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--oga-text-light, ghostwhite);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

/* Hamburger → X animation */
.oga-header.open .oga-header-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.oga-header.open .oga-header-toggle span:nth-child(2) {
    opacity: 0;
}

.oga-header.open .oga-header-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== NAVIGATION ===== */
.oga-header-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.oga-header-nav > a,
.oga-header-dropdown-trigger {
    color: var(--oga-text-muted, #ccc);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: color 0.2s ease, background 0.2s ease;
    white-space: nowrap;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.oga-header-nav > a:hover,
.oga-header-nav > a:focus-visible,
.oga-header-dropdown-trigger:hover,
.oga-header-dropdown-trigger:focus-visible,
.oga-header-dropdown.active .oga-header-dropdown-trigger {
    color: var(--oga-primary, #FF8C00);
    background: rgba(255, 140, 0, 0.08);
}

.oga-header-dropdown-trigger .fa-chevron-down {
    font-size: 0.6rem;
    transition: transform 0.2s ease;
}

.oga-header-dropdown.active .oga-header-dropdown-trigger .fa-chevron-down {
    transform: rotate(180deg);
}

/* ===== ACTIVE PAGE HIGHLIGHTING ===== */
.oga-header-nav > a.oga-nav-active {
    color: var(--oga-primary, #FF8C00);
    position: relative;
}

.oga-header-nav > a.oga-nav-active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0.75rem;
    right: 0.75rem;
    height: 2px;
    background: var(--oga-primary, #FF8C00);
    border-radius: 1px;
}

.oga-header-dropdown.oga-nav-active > .oga-header-dropdown-trigger {
    color: var(--oga-primary, #FF8C00);
    position: relative;
}

.oga-header-dropdown.oga-nav-active > .oga-header-dropdown-trigger::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0.75rem;
    right: calc(0.75rem + 0.3rem + 0.6rem); /* account for gap + chevron */
    height: 2px;
    background: var(--oga-primary, #FF8C00);
    border-radius: 1px;
}

.oga-header-dropdown-menu a.oga-nav-active {
    color: var(--oga-text-light, ghostwhite);
    background: rgba(255, 140, 0, 0.1);
    border-left-color: var(--oga-primary, #FF8C00);
}

/* Contact CTA button */
.oga-header-cta {
    background: var(--oga-primary, #FF8C00) !important;
    color: white !important;
    padding: 0.5rem 1.25rem !important;
    border-radius: 9999px !important;
    font-weight: 600 !important;
    font-size: 0.85rem !important;
    transition: all 0.3s ease !important;
    margin-left: 0.5rem;
}

.oga-header-cta:hover,
.oga-header-cta:focus-visible {
    background: var(--oga-primary-hover, #ff9d1a) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255, 140, 0, 0.4);
}

/* ===== DROPDOWN MENUS ===== */
.oga-header-dropdown {
    position: relative;
}

.oga-header-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 50%;
    transform: translateX(-50%);
    min-width: 220px;
    background: var(--oga-bg-darker, #1e1e1e);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 0.5rem;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    opacity: 0;
    transform: translateX(-50%) translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

/* Arrow pointer */
.oga-header-dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: var(--oga-bg-darker, #1e1e1e);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.oga-header-dropdown.active .oga-header-dropdown-menu {
    display: block;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.oga-header-dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.6rem 0.85rem;
    color: var(--oga-text-muted, #ccc);
    text-decoration: none;
    font-size: 0.88rem;
    border-radius: 6px;
    transition: all 0.15s ease;
    border-left: 2px solid transparent;
}

.oga-header-dropdown-menu a:hover,
.oga-header-dropdown-menu a:focus-visible {
    color: var(--oga-text-light, ghostwhite);
    background: rgba(255, 140, 0, 0.1);
    border-left-color: var(--oga-primary, #FF8C00);
}

.oga-header-dropdown-menu a i {
    width: 16px;
    text-align: center;
    color: var(--oga-primary, #FF8C00);
    font-size: 0.8rem;
    opacity: 0.7;
}

.oga-header-dropdown-menu a:hover i {
    opacity: 1;
}

/* ===== MOBILE NAV ===== */
@media (max-width: 960px) {
    .oga-header-toggle {
        display: flex;
    }

    .oga-header-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: var(--oga-bg-dark, #2d2929);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        padding: 0.5rem 1rem 1rem;
        gap: 0.15rem;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
        box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        scrollbar-width: thin;
        scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
    }

    .oga-header-nav::-webkit-scrollbar {
        width: 6px;
    }

    .oga-header-nav::-webkit-scrollbar-track {
        background: transparent;
    }

    .oga-header-nav::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.15);
        border-radius: 3px;
    }

    .oga-header.open .oga-header-nav {
        display: flex;
    }

    .oga-header-nav > a,
    .oga-header-dropdown-trigger {
        padding: 0.75rem 1rem;
        font-size: 1rem;
        width: 100%;
        min-height: 44px;
        justify-content: space-between;
    }

    /* Active page: switch from underline to left border on mobile */
    .oga-header-nav > a.oga-nav-active {
        border-left: 3px solid var(--oga-primary, #FF8C00);
        background: rgba(255, 140, 0, 0.06);
        border-radius: 0 6px 6px 0;
    }

    .oga-header-nav > a.oga-nav-active::after {
        display: none;
    }

    .oga-header-dropdown.oga-nav-active > .oga-header-dropdown-trigger {
        border-left: 3px solid var(--oga-primary, #FF8C00);
        background: rgba(255, 140, 0, 0.06);
        border-radius: 0 6px 6px 0;
    }

    .oga-header-dropdown.oga-nav-active > .oga-header-dropdown-trigger::after {
        display: none;
    }

    /* CTA in mobile */
    .oga-header-cta {
        margin-left: 0 !important;
        margin-top: 0.5rem;
        text-align: center;
        justify-content: center;
    }

    /* Dropdown in mobile */
    .oga-header-dropdown-menu {
        position: static;
        transform: none;
        min-width: 0;
        background: rgba(0, 0, 0, 0.2);
        border: none;
        border-radius: 8px;
        box-shadow: none;
        padding: 0.25rem 0 0.25rem 0.5rem;
        margin-top: 0.25rem;
    }

    .oga-header-dropdown-menu::before {
        display: none;
    }

    .oga-header-dropdown.active .oga-header-dropdown-menu {
        opacity: 1;
        transform: none;
    }

    .oga-header-dropdown-menu a {
        padding: 0.65rem 0.85rem;
        font-size: 0.95rem;
        min-height: 44px;
    }
}

@media (max-width: 480px) {
    .oga-header-inner {
        padding: 0 1rem;
    }

    .oga-header-logo img {
        height: 36px;
    }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    .oga-header-toggle span,
    .oga-header-nav > a,
    .oga-header-dropdown-trigger,
    .oga-header-dropdown-menu,
    .oga-header-dropdown-menu a,
    .oga-header-cta,
    .oga-header-dropdown-trigger .fa-chevron-down {
        transition: none;
    }
}