/* ============================================================
   STARTUDS - Navbar Override Stylesheet
   Modern split-button navigation with mobile overlay menu.
   This file overrides the navbar rules in style.css.
   ============================================================ */

/* ===== DESKTOP NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--navbar-height, 72px);
    background: rgba(var(--color-primary-rgb), 0.02);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s ease;
}
.navbar.scrolled {
    background: var(--bg-surface);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom-color: var(--border-color);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
}
.navbar > .container {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 1rem;
}

/* Logo */
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    flex-shrink: 0;
    z-index: 1001;
}
.brand-logo {
    height: 36px;
    width: auto;
}
.brand-logo-light { display: block; }
.brand-logo-dark { display: none; }
[data-theme="dark"] .brand-logo-light { display: none; }
[data-theme="dark"] .brand-logo-dark { display: block; }
.navbar-brand .brand-text {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* ===== CENTER NAV ===== */
.navbar-center {
    flex: 1;
    display: flex;
    justify-content: center;
}
.nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2px;
    align-items: center;
}
.nav-item > a,
.nav-link-main {
    display: block;
    padding: 7px 14px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: color 0.2s, background 0.2s;
    white-space: nowrap;
}
.nav-item > a:hover,
.nav-link-main:hover {
    color: var(--text-primary);
    background: var(--color-primary-10);
}
.nav-item.active > a,
.nav-item.active .nav-link-main {
    color: var(--color-primary);
}

/* Split button: link + chevron trigger */
.nav-has-sub {
    display: flex;
    align-items: center;
    position: relative;
}
.nav-has-sub .nav-link-main {
    border-radius: 8px 0 0 8px;
    padding-right: 8px;
}
.nav-sub-trigger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 7px 10px 7px 6px;
    border-radius: 0 8px 8px 0;
    color: var(--text-muted);
    font-size: 0.6rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
}
.nav-sub-trigger:hover {
    background: var(--color-primary-10);
    color: var(--color-primary);
}
.nav-sub-trigger.open {
    color: var(--color-primary);
}
.nav-sub-trigger.open i {
    transform: rotate(180deg);
}
.nav-sub-trigger i {
    transition: transform 0.25s ease;
}

/* Dropdown submenu */
.nav-submenu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 260px;
    padding: 8px;
    background: var(--bg-surface);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12), 0 0 0 1px rgba(var(--color-primary-rgb), 0.04);
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1100;
}
.nav-submenu.open {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.nav-submenu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 14px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 0.875rem;
    transition: all 0.15s;
}
.nav-submenu a:hover {
    background: var(--color-primary-10);
    color: var(--text-primary);
}
.nav-submenu a i {
    width: 20px;
    text-align: center;
    color: var(--color-primary);
    font-size: 0.8rem;
    opacity: 0.7;
}
.nav-submenu a:hover i {
    opacity: 1;
}
.nav-submenu-footer {
    border-top: 1px solid var(--border-color);
    margin-top: 4px;
    padding-top: 4px;
}
.nav-submenu-footer a {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.8rem;
}

/* ===== RIGHT ACTIONS ===== */
.navbar-end {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Theme toggle — use the same theme-toggle class from style.css */
/* Already styled in style.css, just ensure it works in the new context */

/* Hamburger — hidden on desktop */
.nav-hamburger {
    display: none;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    padding: 0;
    z-index: 1001;
    border-radius: 8px;
    transition: background 0.2s;
}
.nav-hamburger:hover {
    background: var(--color-primary-10);
}
.nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    position: absolute;
    left: 9px;
    border-radius: 2px;
    transition: all 0.35s cubic-bezier(0.68, -0.6, 0.32, 1.6);
}
.nav-hamburger span:nth-child(1) { top: 12px; }
.nav-hamburger span:nth-child(2) { top: 19px; width: 16px; }
.nav-hamburger span:nth-child(3) { top: 26px; }
.nav-hamburger.open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
.nav-hamburger.open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }

/* ===== MOBILE OVERLAY MENU ===== */
.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
.mobile-nav-overlay.open {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 320px;
    max-width: 85vw;
    height: 100vh;
    height: 100dvh;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-nav-overlay.open .mobile-nav-panel {
    transform: translateX(0);
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.mobile-nav-header .navbar-brand .brand-text {
    font-size: 1.15rem;
}

.mobile-nav-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.2s;
}
.mobile-nav-close:hover {
    background: var(--color-primary-10);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.mobile-nav-list {
    list-style: none;
    margin: 0;
    padding: 8px 0;
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.mobile-nav-list > li {
    border-bottom: 1px solid rgba(128, 128, 128, 0.08);
}
.mobile-nav-list > li > a,
.mobile-nav-link {
    display: block;
    padding: 14px 24px;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
}
.mobile-nav-list > li > a:hover,
.mobile-nav-link:hover {
    background: var(--color-primary-10);
}
.mobile-nav-list > li.active > a,
.mobile-nav-list > li.active .mobile-nav-link {
    color: var(--color-primary);
}

/* Mobile accordion for dropdown items */
.mobile-nav-row {
    display: flex;
    align-items: center;
}
.mobile-nav-row .mobile-nav-link {
    flex: 1;
}
.mobile-sub-toggle {
    width: 52px;
    height: 52px;
    border: none;
    background: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: all 0.3s;
    flex-shrink: 0;
}
.mobile-sub-toggle:hover {
    color: var(--color-primary);
}
.mobile-sub-toggle.open {
    transform: rotate(45deg);
    color: var(--color-primary);
}

.mobile-sub-list {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    background: var(--bg-surface);
}
.mobile-sub-list.open {
    max-height: 800px;
}
.mobile-sub-list a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 24px 11px 36px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.15s;
}
.mobile-sub-list a:hover {
    color: var(--color-primary);
    background: var(--color-primary-10);
}
.mobile-sub-list a i {
    width: 18px;
    text-align: center;
    color: var(--color-primary);
    font-size: 0.75rem;
    opacity: 0.6;
}
.mobile-sub-list .mobile-sub-footer a {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.85rem;
}

.mobile-nav-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}
.mobile-nav-footer .btn-full {
    display: flex;
    width: 100%;
    justify-content: center;
}

/* ===== BREAKPOINTS ===== */
@media (min-width: 1024px) {
    .nav-hamburger,
    .mobile-nav-overlay {
        display: none !important;
    }
}

@media (max-width: 1023px) {
    .navbar-center {
        display: none;
    }
    .nav-hamburger {
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* ===== HIDE OLD NAVBAR ELEMENTS ===== */
/* These classes are from the old navbar in style.css — hide them so they don't conflict */
.navbar-menu,
.navbar-nav,
.navbar-actions,
.navbar-toggle,
.navbar-cta {
    display: none !important;
}