/* Modern navigation refresh: keeps existing markup/behavior, updates visual style. */

:root {
    --nav-shell-bg: linear-gradient(
        130deg,
        rgba(255, 255, 255, 0.96),
        rgba(245, 250, 255, 0.96)
    );
    --nav-shell-border: rgba(15, 23, 42, 0.12);
    --nav-shell-shadow: 0 22px 44px rgba(15, 23, 42, 0.16);
    --nav-pill-bg: rgba(255, 255, 255, 0.78);
    --nav-pill-border: rgba(15, 23, 42, 0.08);
    --nav-link: #405164;
    --nav-link-hover: #0a3f68;
    --nav-link-active: #0a5f9e;
    --nav-accent: linear-gradient(120deg, #0d7bc2 0%, #07b7ca 100%);
    --nav-search-bg: #ffffff;
    --nav-search-border: rgba(15, 23, 42, 0.12);
}

[data-theme="dark"] {
    --nav-shell-bg: linear-gradient(
        130deg,
        rgba(17, 24, 39, 0.96),
        rgba(17, 35, 55, 0.96)
    );
    --nav-shell-border: rgba(148, 163, 184, 0.24);
    --nav-shell-shadow: 0 24px 44px rgba(0, 0, 0, 0.44);
    --nav-pill-bg: rgba(30, 41, 59, 0.8);
    --nav-pill-border: rgba(148, 163, 184, 0.2);
    --nav-link: #c8d5e6;
    --nav-link-hover: #f0f7ff;
    --nav-link-active: #70d9ff;
    --nav-accent: linear-gradient(120deg, #238dd9 0%, #22d3ee 100%);
    --nav-search-bg: rgba(15, 23, 42, 0.9);
    --nav-search-border: rgba(148, 163, 184, 0.28);
}

#main-nav {
    min-height: 172px;
    border-radius: 1.2rem;
    border: 1px solid var(--nav-shell-border);
    background: var(--nav-shell-bg);
    box-shadow: var(--nav-shell-shadow);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    overflow: visible;
}

nav.main {
    height: auto;
    padding: 0.4rem;
    border-radius: 1.35rem;
    background: transparent;
}

nav.main:before,
nav.main:after {
    display: none;
}

nav .logo {
    border-right: 1px solid var(--nav-shell-border);
    padding: 0.4rem 0;
    padding-right: 1rem;
    text-align: center;
}

nav .logo > strong {
    font-size: 2rem;
    letter-spacing: 0.015em;
}

nav .nav-top {
    height: auto;
    min-height: 3.15rem;
    border-bottom: 1px solid var(--nav-shell-border);
    background: linear-gradient(
        90deg,
        rgba(13, 123, 194, 0.06),
        rgba(7, 183, 202, 0.04)
    );
}

nav .nav-top p {
    font-family: "Rajdhani", "Oswald", sans-serif;
    font-size: 1.12rem;
    font-weight: 600;
    letter-spacing: 0.012em;
    color: var(--nav-link-hover);
}

[data-theme="dark"] nav .nav-top p {
    color: #def4ff;
}

nav .nav-top img {
    margin-right: 0;
    border-radius: 999px;
    box-shadow: 0 10px 20px rgba(15, 23, 42, 0.15);
}

nav .nav-search {
    border-bottom: 1px solid var(--nav-shell-border);
    background: transparent;
}

nav .nav-search .search-form {
    width: min(100%, 560px);
}

nav .nav-search .search-form .input-group {
    border: 1px solid var(--nav-search-border);
    border-radius: 999px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(15, 23, 42, 0.08);
    background: var(--nav-search-bg);
}

nav .nav-search .search-form .input-group .form-control {
    border: 0;
    background: transparent;
    color: var(--nav-link-hover);
    padding: 0.68rem 1.05rem;
    font-family: "Rajdhani", "Oswald", sans-serif;
    font-size: 1rem;
    letter-spacing: 0.01em;
}

nav .nav-search .search-form .input-group .form-control::placeholder {
    color: #6f7f92;
}

[data-theme="dark"]
    nav
    .nav-search
    .search-form
    .input-group
    .form-control::placeholder {
    color: #9db2c8;
}

nav .nav-search .search-form .input-group .form-control:focus {
    border: 0;
    box-shadow: none;
    color: var(--nav-link-hover);
}

nav .nav-search .search-form .input-group .btn-primary {
    border: 0;
    border-left: 1px solid var(--nav-search-border);
    padding: 0.6rem 1rem;
    background: var(--nav-accent);
    color: #fff;
}

nav .nav-search .search-form .input-group .btn-primary:hover {
    filter: brightness(1.07);
}

nav .nav-bottom {
    max-width: 100%;
    background: transparent;
}

nav .nav-bottom > .col-12 > ul:first-child {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.2rem;
    width: 100%;
    float: none;
    padding: 0.36rem 0.58rem;
}

nav .nav-bottom ul:first-child > li {
    float: none;
    height: auto;
    padding: 0;
    margin: 0;
}

nav .nav-bottom ul:first-child > li > a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.4rem;
    padding: 0.42rem 0.9rem;
    border-radius: 999px;
    font-family: "Rajdhani", "Oswald", sans-serif;
    font-size: 1.04rem;
    font-weight: 600;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.026em;
    color: var(--nav-link);
    transition:
        color 0.2s ease,
        background-color 0.2s ease,
        box-shadow 0.2s ease;
}

nav .nav-bottom ul:first-child > li > a:hover {
    color: var(--nav-link-hover);
    text-decoration: none;
    background: var(--nav-pill-bg);
    box-shadow: inset 0 0 0 1px var(--nav-pill-border);
}

nav .nav-bottom ul:first-child > li.active {
    text-shadow: none;
}

nav .nav-bottom ul:first-child > li.active > a {
    color: var(--nav-link-active);
    background: var(--nav-pill-bg);
    box-shadow:
        inset 0 0 0 1px var(--nav-pill-border),
        0 8px 16px rgba(10, 123, 194, 0.16);
}

nav .nav-bottom #mobile-nav-opener {
    display: none;
}

#mobile-view-toggle-nav-item a {
    background: linear-gradient(
        120deg,
        rgba(13, 123, 194, 0.12),
        rgba(7, 183, 202, 0.1)
    );
}

#main-nav > .col-12.col-md-2:last-child {
    border-left: 1px solid var(--nav-shell-border);
}

/* Guest auth buttons: consistent sizing/geometry for login and sign-up. */
.guest-auth-wrap {
    width: 100%;
    gap: 0.55rem;
}

.guest-auth-btn {
    width: 10.5rem;
    min-height: 2.5rem;
    justify-content: center;
    border-radius: 999px;
    font-family: "Rajdhani", "Oswald", sans-serif;
    font-size: 1.02rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    box-shadow: 0 10px 20px rgba(15, 23, 42, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition:
        transform 0.22s ease,
        box-shadow 0.22s ease,
        filter 0.22s ease;
}

.guest-auth-btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.04);
    box-shadow: 0 14px 26px rgba(15, 23, 42, 0.24);
}

.guest-auth-btn svg {
    width: 1rem;
    height: 1rem;
}

.guest-auth-btn-login {
    background: linear-gradient(120deg, #155ea5 0%, #0ea5e9 100%);
}

.guest-auth-btn-signup {
    background: linear-gradient(120deg, #0d9c8a 0%, #2dbb77 100%);
}

[data-theme="dark"] .guest-auth-btn {
    box-shadow: 0 12px 26px rgba(2, 6, 23, 0.5);
    border-color: rgba(148, 163, 184, 0.24);
}

[data-theme="dark"] .guest-auth-btn-login {
    background: linear-gradient(120deg, #1d4f91 0%, #0284c7 100%);
}

[data-theme="dark"] .guest-auth-btn-signup {
    background: linear-gradient(120deg, #0a8c7d 0%, #1f9f65 100%);
}

@media (max-width: 768px) {
    nav.main {
        padding: 0;
        border-radius: 1.1rem;
    }

    #main-nav {
        border-radius: 1.1rem;
        min-height: 0;
    }

    #main-nav > [class*="col-"] {
        max-width: 100%;
        flex: 0 0 100%;
    }

    #main-nav > .col-12.col-md-2:last-child {
        border-left: 0;
        border-top: 1px solid var(--nav-shell-border);
    }

    .guest-auth-wrap {
        padding: 0.65rem 0.35rem;
        flex-direction: row;
        justify-content: center;
    }

    .guest-auth-btn {
        width: min(48%, 10.5rem);
        min-height: 2.45rem;
    }

    nav .logo {
        border-right: 0;
        border-bottom: 1px solid var(--nav-shell-border);
        height: auto;
        padding: 0.8rem 0 0.4rem;
    }

    nav .logo:before {
        margin-top: 0;
        height: 58px;
    }

    nav .logo > strong {
        margin-top: 0;
        font-size: 1.8rem;
    }

    nav .nav-top {
        min-height: 0;
        padding: 0.35rem 0.5rem;
    }

    nav .nav-search {
        padding: 0.55rem 0.65rem;
    }

    nav .nav-search .search-form {
        width: 100%;
    }

    nav .nav-bottom {
        width: 100%;
        overflow: hidden;
        transition: max-height 0.35s ease;
        border-top: 1px solid var(--nav-shell-border);
    }

    nav .nav-bottom > .col-12 > ul:first-child {
        display: block;
        width: 100%;
        padding: 0.5rem 0.6rem 0.7rem;
    }

    nav .nav-bottom ul:first-child > li {
        width: 100%;
        display: block;
    }

    nav .nav-bottom ul:first-child > li > a {
        width: 100%;
        justify-content: flex-start;
        border-radius: 0.78rem;
        padding: 0.78rem 0.9rem;
        font-size: 1.02rem;
    }

    nav .nav-bottom #mobile-nav-opener {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 100%;
        min-height: 2.8rem;
        margin-bottom: 0.35rem;
        border-radius: 0.78rem;
        border: 1px solid var(--nav-shell-border);
        background: var(--nav-pill-bg);
        color: var(--nav-link-hover);
        box-shadow: 0 6px 12px rgba(15, 23, 42, 0.12);
    }

    nav .nav-bottom #mobile-nav-opener svg {
        width: 1.2rem;
        height: 1.2rem;
    }

    nav .nav-bottom:not(.open) {
        max-height: 3.95rem;
    }

    nav .nav-bottom.open {
        max-height: 34rem;
    }

    #mobile-view-toggle-nav-item a {
        justify-content: center;
        text-align: center;
    }
}