/* ================================================
   HEADER.CSS — Brain Voyages Global Header
   Covers: Desktop, Tablet, Mobile, Small Mobile
   ================================================ */

/* ========================
   Top Bar
======================== */
.top-bar {
    background: #1f4ea3;
    color: #fff;
    font-size: 14px;
    padding: 10px 0;
}

.top-bar .container {
    max-width: 1400px;
    width: 95%;
    margin: auto;
}

.top-bar a {
    color: #fff;
    text-decoration: none;
}

.top-bar a:hover {
    text-decoration: underline;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}

/* ========================
   Header Wrapper
======================== */
.bv-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

/* ========================
   Navbar
======================== */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    min-height: 80px;
    display: flex;
    align-items: center;
    width: 100%;
}

.nav-wrapper {
    max-width: 1400px;
    width: 95%;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 0;
}

/* ========================
   Logo
======================== */
.logo {
    flex-shrink: 0;
    text-decoration: none;
}

.logo img {
    height: 48px;
    display: block;
}

/* ========================
   Desktop Nav Menu
======================== */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
    list-style: none;
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
}

.nav-menu li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 15px;
    white-space: nowrap;
    transition: color 0.25s;
}

.nav-menu li a:hover {
    color: #1f4ea3;
}

/* ========================
   CTA Button
======================== */
.btn-start {
    background: #ff7a00;
    color: #fff !important;
    padding: 10px 22px;
    border-radius: 25px;
    font-weight: 600;
    font-size: 14px;
    white-space: nowrap;
    transition: background 0.25s;
}

.btn-start:hover {
    background: #e56700;
}

/* ========================
   Dropdown
======================== */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    min-width: 220px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.25s ease;
    z-index: 9999;
    pointer-events: none;
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu li a {
    display: block;
    padding: 10px 18px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: background 0.2s, color 0.2s;
}

.dropdown-menu li a:hover {
    background: #f5f7fb;
    color: #1f4ea3;
}

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

/* ========================
   Hamburger Button
======================== */
.hamburger {
    display: none;
    font-size: 26px;
    cursor: pointer;
    background: none;
    border: none;
    color: #333;
    padding: 4px 8px;
    line-height: 1;
    flex-shrink: 0;
}

/* ========================
   Mobile Full-Screen Drawer
======================== */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -105%;
    width: 100%;
    height: 100vh;
    background: #fff;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.12);
    padding: 30px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1100;
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu a {
    text-decoration: none;
    color: #222;
    font-size: 16px;
    font-weight: 500;
    padding: 6px 0;
    border-bottom: 1px solid #f0f0f0;
    transition: color 0.2s;
}

.mobile-menu a:hover {
    color: #1f4ea3;
}

.close-menu {
    font-size: 26px;
    align-self: flex-end;
    cursor: pointer;
    color: #333;
    background: none;
    border: none;
    line-height: 1;
    margin-bottom: 10px;
}

/* Mobile Dropdown Button */
.mobile-dropdown button {
    background: none;
    border: none;
    color: #222;
    font-size: 16px;
    font-weight: 500;
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    padding: 6px 0;
    width: 100%;
    border-bottom: 1px solid #f0f0f0;
    transition: color 0.2s;
}

.mobile-dropdown button:hover {
    color: #1f4ea3;
}

/* Mobile Submenu */
.mobile-submenu {
    display: none;
    flex-direction: column;
    gap: 8px;
    padding-left: 16px;
    padding-top: 6px;
}

.mobile-submenu a {
    font-size: 14px;
    color: #555;
    border-bottom: none;
}

.mobile-submenu a:hover {
    color: #1f4ea3;
}

/* ================================================
   RESPONSIVE BREAKPOINTS
   ================================================ */

/* ── Large Desktop (1400px+) ───────────────────── */
@media (min-width: 1400px) {
    .nav-wrapper {
        width: 92%;
    }

    .nav-menu {
        gap: 30px;
    }
}

/* ── Small Desktop / Large Tablet (1099px – 1279px) ─ */
@media (max-width: 1279px) and (min-width: 1099px) {
    .nav-menu {
        gap: 18px;
    }

    .nav-menu li a {
        font-size: 14px;
    }
}

/* ── Tablet + Nav collapse threshold (≤ 1098px) ── */
@media (max-width: 1098px) {
    /* Hide desktop nav, show hamburger */
    .nav-menu {
        display: none !important;
    }

    .hamburger {
        display: block !important;
    }

    .top-bar {
        display: none !important;
    }
}

/* ── Tablet Portrait (768px – 1098px) ─────────── */
@media (max-width: 1098px) and (min-width: 769px) {
    .navbar {
        min-height: 70px;
    }

    .logo img {
        height: 42px;
    }
}

/* ── Mobile Landscape / Large Phone (481px – 768px) ─ */
@media (max-width: 768px) {
    .navbar {
        min-height: 64px;
    }

    .logo img {
        height: 38px;
    }

    .nav-wrapper {
        width: 92%;
    }

    .mobile-menu {
        padding: 24px 20px;
        gap: 12px;
    }

    .mobile-menu a {
        font-size: 15px;
    }
}

/* ── Mobile Portrait (≤ 480px) ────────────────── */
@media (max-width: 480px) {
    .navbar {
        min-height: 58px;
    }

    .logo img {
        height: 34px;
    }

    .nav-wrapper {
        width: 94%;
    }

    .hamburger {
        font-size: 22px;
    }

    .mobile-menu {
        padding: 20px 16px;
        gap: 10px;
    }

    .mobile-menu a {
        font-size: 14px;
    }

    .mobile-dropdown button {
        font-size: 14px;
    }
}

/* ── Very Small / Older Phones (≤ 360px) ──────── */
@media (max-width: 360px) {
    .logo img {
        height: 30px;
    }

    .hamburger {
        font-size: 20px;
    }

    .mobile-menu {
        padding: 16px 14px;
    }

    .mobile-menu a,
    .mobile-dropdown button {
        font-size: 13px;
    }
}

/* ================================================
   CENTERED HEADER – ONLY FOR HOME PAGE
   ================================================ */

/* Desktop and large tablet (above collapse breakpoint) */
@media (min-width: 1099px) {
    .bv-header.home-header .nav-wrapper {
        justify-content: center !important;
        gap: 2.5rem;
    }

    /* Optional: remove extra margin from logo if any */
    .bv-header.home-header .logo {
        margin-right: 0;
    }

    /* Keep the "Get Started" button visible and centered naturally */
    .bv-header.home-header .btn-start {
        margin-left: 0;
    }
}

/* When header collapses (≤1098px), revert to normal layout
   so hamburger and mobile menu work correctly */
@media (max-width: 1098px) {
    .bv-header.home-header .nav-wrapper {
        justify-content: space-between !important;
        gap: 1rem;
    }
}

/* ================================================
   CENTERED HEADER – FOR INDEX & ABOUT PAGES ONLY
   ================================================ */

/* Desktop and large tablet (above collapse breakpoint) */
@media (min-width: 1099px) {
    .bv-header.home-header .nav-wrapper,
    .bv-header.about-header .nav-wrapper {
        justify-content: center !important;
        gap: 2.5rem;
    }

    /* Remove any extra margins from logo */
    .bv-header.home-header .logo,
    .bv-header.about-header .logo {
        margin-right: 0;
    }

    /* Keep the "Get Started" button naturally centered */
    .bv-header.home-header .btn-start,
    .bv-header.about-header .btn-start {
        margin-left: 0;
    }
}

/* When header collapses (≤1098px), revert to normal layout
   so hamburger and mobile menu work correctly */
@media (max-width: 1098px) {
    .bv-header.home-header .nav-wrapper,
    .bv-header.about-header .nav-wrapper {
        justify-content: space-between !important;
        gap: 1rem;
    }
}


/* ================================================
   CENTERED HEADER – FOR ALL SPECIFIED PAGES
   ================================================ */

/* Desktop and large tablet (above collapse breakpoint) */
@media (min-width: 1099px) {
    .bv-header.home-header .nav-wrapper,
    .bv-header.about-header .nav-wrapper,
    .bv-header.imt-header .nav-wrapper,
    .bv-header.achievements-header .nav-wrapper,
    .bv-header.blog1-header .nav-wrapper,
    .bv-header.blog2-header .nav-wrapper,
    .bv-header.blog3-header .nav-wrapper,
    .bv-header.blog4-header .nav-wrapper,
    .bv-header.blog5-header .nav-wrapper,
    .bv-header.blogs-header .nav-wrapper,
    .bv-header.braincurric-header .nav-wrapper,
    .bv-header.brainvita-header .nav-wrapper,
    .bv-header.career-header .nav-wrapper,
    .bv-header.contact-header .nav-wrapper,
    .bv-header.medfrontier-header .nav-wrapper,
    .bv-header.skillsphere-header .nav-wrapper {
        justify-content: center !important;
        gap: 2.5rem;
    }

    /* Remove any extra margins from logo */
    .bv-header.home-header .logo,
    .bv-header.about-header .logo,
    .bv-header.imt-header .logo,
    .bv-header.achievements-header .logo,
    .bv-header.blog1-header .logo,
    .bv-header.blog2-header .logo,
    .bv-header.blog3-header .logo,
    .bv-header.blog4-header .logo,
    .bv-header.blog5-header .logo,
    .bv-header.blogs-header .logo,
    .bv-header.braincurric-header .logo,
    .bv-header.brainvita-header .logo,
    .bv-header.career-header .logo,
    .bv-header.contact-header .logo,
    .bv-header.medfrontier-header .logo,
    .bv-header.skillsphere-header .logo {
        margin-right: 0;
    }

    /* Keep the "Get Started" button naturally centered */
    .bv-header.home-header .btn-start,
    .bv-header.about-header .btn-start,
    .bv-header.imt-header .btn-start,
    .bv-header.achievements-header .btn-start,
    .bv-header.blog1-header .btn-start,
    .bv-header.blog2-header .btn-start,
    .bv-header.blog3-header .btn-start,
    .bv-header.blog4-header .btn-start,
    .bv-header.blog5-header .btn-start,
    .bv-header.blogs-header .btn-start,
    .bv-header.braincurric-header .btn-start,
    .bv-header.brainvita-header .btn-start,
    .bv-header.career-header .btn-start,
    .bv-header.contact-header .btn-start,
    .bv-header.medfrontier-header .btn-start,
    .bv-header.skillsphere-header .btn-start {
        margin-left: 0;
    }
}

/* When header collapses (≤1098px), revert to normal layout
   so hamburger and mobile menu work correctly */
@media (max-width: 1098px) {
    .bv-header.home-header .nav-wrapper,
    .bv-header.about-header .nav-wrapper,
    .bv-header.imt-header .nav-wrapper,
    .bv-header.achievements-header .nav-wrapper,
    .bv-header.blog1-header .nav-wrapper,
    .bv-header.blog2-header .nav-wrapper,
    .bv-header.blog3-header .nav-wrapper,
    .bv-header.blog4-header .nav-wrapper,
    .bv-header.blog5-header .nav-wrapper,
    .bv-header.blogs-header .nav-wrapper,
    .bv-header.braincurric-header .nav-wrapper,
    .bv-header.brainvita-header .nav-wrapper,
    .bv-header.career-header .nav-wrapper,
    .bv-header.contact-header .nav-wrapper,
    .bv-header.medfrontier-header .nav-wrapper,
    .bv-header.skillsphere-header .nav-wrapper {
        justify-content: space-between !important;
        gap: 1rem;
    }
}