/* Persistent Fixed Navigation Architecture */
/*
.cepha-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    height: 72px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: none;
}
*/
/* Dynamic Floating Navigation Configuration */
.cepha-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background-color: transparent; /* Clear state on page initialization */
    border-bottom: 1px solid rgba(255, 255, 255, 0);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1); /* Smooth layout transition interpolation */
}

/* Scroll Active State (Injected dynamically via main.js) */
.cepha-nav.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 14px 5%;
    box-shadow: 0 4px 30px rgba(15, 23, 42, 0.04);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

/* Coordinate text elements inside the menu links to switch tones during scroll */
.cepha-nav.scrolled .nav-link {
    color: var(--text-secondary);
}
.cepha-nav.scrolled .nav-link.active {
    color: var(--brand-primary);
}
.cepha-nav.scrolled .cepha-nav__logo a {
    color: var(--text-primary);
}
/* Compensate layout body spacing for fixed position alignment context */
body {
    padding-top: 72px !important;
}

.cepha-nav__logo a {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.5px;
}

.cepha-nav__logo span { color: var(--primary); }

/* Main Navigation Menu with Dynamic Underline Engine */
.cepha-nav__main {
    display: flex;
    gap: 36px;
    align-items: center;
}

.cepha-nav__main .nav-link {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-muted);
    position: relative;
    padding: 6px 0;
}

.cepha-nav__main .nav-link:hover {
    color: var(--primary);
}

/* Elegant Underline Indicator */
.cepha-nav__main .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.cepha-nav__main .nav-link.active {
    color: var(--primary);
}

/* Actions Layer Structural Context */
.cepha-nav__actions {
    display: flex;
    align-items: center;
    gap: 24px;
}

/* Clean, Premium Link/Button Upgrades */
.btn-login-link {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-main);
    padding: 10px 16px;
    border-radius: 8px;
}

.btn-login-link:hover {
    color: var(--primary);
    background-color: rgba(0, 122, 135, 0.04);
}

/* Professional Desktop User Profile Badge & Dropdown */
.profile-dropdown-container {
    position: relative;
}

.profile-trigger-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    background: transparent;
    border: 1px solid var(--border);
    padding: 6px 14px 6px 6px;
    border-radius: 100px;
    cursor: pointer;
    transition: var(--transition);
}

.profile-trigger-btn:hover,
.profile-trigger-btn.active {
    background: var(--white);
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.avatar-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 122, 135, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

.trigger-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-main);
}

.chevron-icon {
    color: var(--text-muted);
    transition: transform 0.2s ease;
}

.chevron-icon.rotate {
    transform: rotate(180deg);
}

/* Suspended Dropdown Card Panel */
.profile-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 240px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    padding: 8px;
    z-index: 1100;
}

.dropdown-header {
    padding: 12px 16px;
}

.dropdown-user-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-main);
    line-height: 1.2;
}

.dropdown-user-email {
    font-weight: 400;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
    word-break: break-all;
}

.dropdown-divider {
    height: 1px;
    background: var(--border);
    margin: 6px 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: var(--transition);
}

.dropdown-item:hover {
    background: rgba(0, 122, 135, 0.04);
    color: var(--primary);
}

.dropdown-item.logout-item:hover {
    background: #fff5f5;
    color: #e53e3e;
}

/* Micro-interaction Animation Template */
.transition-fade-in {
    animation: dropdownFade 0.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes dropdownFade {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Advanced Hamburger Menu Framework */
.hamburger-advanced {
    display: none;
    padding: 12px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1200;
}

.hamburger-box {
    width: 24px;
    height: 18px;
    display: inline-block;
    position: relative;
}

.hamburger-inner {
    width: 24px;
    height: 2px;
    background-color: var(--text-main);
    border-radius: 2px;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    transition: transform 0.22s cubic-bezier(0.55, 0.055, 0.675, 0.19), background-color 0.1s 0.22s ease;
}

.hamburger-inner::before,
.hamburger-inner::after {
    content: "";
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-main);
    border-radius: 2px;
    position: absolute;
    transition: top 0.1s 0.25s ease, transform 0.22s cubic-bezier(0.55, 0.055, 0.675, 0.19);
}

.hamburger-inner::before { top: -7px; }
.hamburger-inner::after { bottom: -7px; }

/* Morphing Animation Engine Sequence to Close State */
.hamburger-advanced.active .hamburger-inner {
    transform: rotate(225deg);
    background-color: var(--text-main);
    transition: transform 0.22s 0.12s cubic-bezier(0.215, 0.61, 0.355, 1);
}

.hamburger-advanced.active .hamburger-inner::before {
    top: 0;
    opacity: 0;
    transition: top 0.1s ease, opacity 0.1s 0.12s ease;
}

.hamburger-advanced.active .hamburger-inner::after {
    bottom: 0;
    transform: rotate(-90deg);
    transition: bottom 0.1s ease, transform 0.22s 0.12s cubic-bezier(0.215, 0.61, 0.355, 1);
}

/* Mobile-Only Actions Config Layout Default */
.mobile-only-actions { display: none; }

/* Responsive Viewports Overhaul (Breakpoint Window <= 992px) */
@media (max-width: 992px) {
    .hamburger-advanced { display: block; }
    
    .cepha-nav__actions .btn-login-link, 
    .cepha-nav__actions .btn--primary,
    .cepha-nav__actions .profile-dropdown-container {
        display: none;
    }

    .cepha-nav__main {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        height: calc(100vh - 72px);
        background: var(--white);
        flex-direction: column;
        justify-content: center; 
        align-items: center;      
        gap: 28px;
        padding: 40px 10%;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
    }

    .cepha-nav__main.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    /* Centered Text Lines on Mobile View */
    .cepha-nav__main .nav-link {
        font-size: 1.25rem;
        text-align: center;
        width: auto;
    }
    
    .cepha-nav__main .nav-link::after {
        display: none; /* Strip fixed underline bars from absolute paths on mobile viewports */
    }

    /* Stacked Actions Config for Mobile Contexts */
    .mobile-only-actions {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 16px;
        margin-top: 20px;
        width: 100%;
        max-width: 280px; 
    }
    
    .mobile-only-actions .btn {
        width: 100%;
        text-align: center;
    }

    .mobile-user-details {
        display: flex;
        flex-direction: column;
        align-items: center;
        margin-bottom: 8px;
        text-align: center;
    }

    .mobile-user-name {
        font-weight: 700;
        font-size: 1.1rem;
        color: var(--text-main);
    }

    .mobile-user-email {
        font-size: 0.85rem;
        color: var(--text-muted);
    }
}