/* CLEAN NAVIGATION CSS - Academic Professional Standards */

/* Desktop Navigation */
.academic-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 3px solid #000;
    z-index: 1000;
    padding: 0;
}

.academic-nav .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 14pt;
    font-weight: bold;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #000;
    text-decoration: none;
}

.logo:visited,
.logo:hover,
.logo:active {
    color: #000;
    text-decoration: none;
}

.logo img {
    width: 20px;
    height: 20px;
}

/* Navigation Links - Desktop */
.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0;
}

.nav-links li {
    margin: 0;
    border-right: 1px solid #ddd;
}

.nav-links li:last-child {
    border-right: none;
}

.nav-links a {
    display: block;
    padding: 8px 15px;
    color: #000;
    text-decoration: none;
    font-size: 10pt;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.nav-links a:hover {
    background: #000;
    color: #fff;
}

/* Page Sections Navigation (Internal Links) */
.internal-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0;
}

.internal-nav li {
    border-right: 1px solid #ddd;
}

.internal-nav li:last-child {
    border-right: none;
}

.internal-nav a {
    display: block;
    padding: 8px 12px;
    color: #666;
    text-decoration: none;
    font-size: 9pt;
}

.internal-nav a:hover {
    background: #f5f5f5;
    color: #000;
}

/* External Pages Navigation */
.external-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0;
}

.external-nav li {
    border-left: 1px solid #ddd;
}

.external-nav li:first-child {
    border-left: none;
}

.external-nav a {
    display: block;
    padding: 8px 12px;
    color: #000;
    text-decoration: none;
    font-size: 9pt;
    font-weight: bold;
}

.external-nav a:hover {
    background: #000;
    color: #fff;
}

/* Two-Row Navigation */
.nav-wrapper {
    display: flex;
    flex-direction: column;
    flex: 1;
    margin-left: 30px;
}

.nav-row {
    display: flex;
    justify-content: flex-end;
    padding: 5px 0;
}

.nav-row:first-child {
    border-bottom: 1px solid #eee;
}

/* Mobile Menu Toggle (Hidden by Default) */
.mobile-menu-toggle {
    display: none;
    background: transparent;
    color: #000;
    border: none;
    padding: 8px;
    font-size: 24px;
    cursor: pointer;
    font-weight: normal;
    line-height: 1;
    min-width: 44px;
    min-height: 44px;
    -webkit-tap-highlight-color: transparent;
}

.mobile-menu-toggle:hover {
    background: rgba(0, 0, 0, 0.04);
}

.mobile-menu-toggle:active {
    background: rgba(0, 0, 0, 0.08);
}

/* Mobile Navigation */
@media screen and (max-width: 1024px) {
    .academic-nav .container {
        padding: 10px 15px;
    }

    .nav-links a {
        padding: 8px 10px;
        font-size: 9pt;
    }
}

@media screen and (max-width: 768px) {
    .academic-nav {
        border-bottom: 2px solid #000;
    }

    .academic-nav .container {
        flex-direction: row;
        flex-wrap: wrap;
        padding: 15px 20px;
        align-items: center;
        gap: 0;
        justify-content: space-between;
    }

    .logo {
        font-size: 13pt;
        flex: 0 1 auto;
        order: 1;
    }

    .logo img {
        width: 18px;
        height: 18px;
    }

    /* Show mobile toggle */
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        margin: 0;
        order: 2;
    }

    /* Mobile dropdown menu */
    .nav-wrapper {
        display: none;
        width: 100%;
        margin-left: 0;
        margin-top: 0;
        padding-top: 10px;
        border-top: 2px solid #000;
        order: 3;
        flex-basis: 100%;
    }

    .nav-wrapper.active {
        display: block;
    }

    .nav-row {
        flex-direction: column;
        padding: 0;
        border-bottom: none;
        justify-content: flex-start;
    }

    .nav-row:first-child {
        border-bottom: none;
        margin-bottom: 5px;
    }

    .nav-links,
    .internal-nav,
    .external-nav {
        flex-direction: column;
        width: 100%;
    }

    .nav-links li,
    .internal-nav li,
    .external-nav li {
        border: none;
    }

    .nav-links a,
    .internal-nav a,
    .external-nav a {
        padding: 10px 15px;
        border-bottom: 1px solid #eee;
        text-align: left;
        font-size: 10pt;
    }

    .nav-links a:hover,
    .internal-nav a:hover,
    .external-nav a:hover {
        background: #f5f5f5;
    }
}

@media screen and (max-width: 480px) {
    .academic-nav .container {
        padding: 12px 15px;
    }

    .logo {
        font-size: 11pt;
        letter-spacing: 0.5px;
    }

    .logo img {
        width: 16px;
        height: 16px;
    }

    .mobile-menu-toggle {
        padding: 6px;
        font-size: 22px;
        min-width: 40px;
        min-height: 40px;
    }

    .nav-links a,
    .internal-nav a,
    .external-nav a {
        font-size: 10pt;
        padding: 10px 15px;
    }
}