/* Updated global styles for light blue and white theme */
:root {
    color-scheme: light;
    --site-bg: #e6f7ff;
    --site-bg-deep: #cceeff;
    --site-surface: rgba(230, 247, 255, 0.9);
    --site-surface-strong: rgba(204, 238, 255, 0.96);
    --site-border: rgba(0, 123, 255, 0.16);
    --site-border-strong: rgba(0, 123, 255, 0.28);
    --site-text: #003366;
    --site-muted: rgba(0, 51, 102, 0.7);
    --site-accent: #007bff;
    --site-accent-strong: #0056b3;
    --site-warning: #ffcc00;
    --site-shadow: 0 24px 60px rgba(0, 123, 255, 0.2);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Aptos", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    color: var(--site-text);
    line-height: 1.6;
    background:
        radial-gradient(120% 90% at 10% -10%, rgba(0, 123, 255, 0.14), transparent 55%),
        radial-gradient(90% 80% at 100% 0%, rgba(179, 229, 255, 0.45), transparent 62%),
        linear-gradient(180deg, #ecf8ff 0%, #dff1ff 52%, #d3eaff 100%);
    background-color: var(--site-bg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}

body, button, input, textarea, select {
    font: inherit;
}

body {
    -webkit-text-size-adjust: 100%;
}

a {
    color: var(--site-accent);
}

a:hover {
    color: var(--site-accent-strong);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--site-accent);
    outline-offset: 2px;
}

.grid-container {
    display: grid;
    gap: 25px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
    align-items: start;
}

.card {
    background: linear-gradient(180deg, rgba(204, 238, 255, 0.9), rgba(179, 229, 255, 0.96));
    border: 1px solid var(--site-border);
    border-radius: 22px;
    padding: 24px;
    box-shadow: var(--site-shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0 0 16px;
    color: var(--site-text);
    letter-spacing: -0.02em;
}

p {
    margin: 0 0 16px;
    color: var(--site-muted);
}

form {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
}

form p {
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-weight: 600;
    color: var(--site-text);
}

input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea,
button[type="submit"] {
    width: 100%;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    padding: 12px 14px;
    border: 1px solid rgba(166, 196, 224, 0.24);
    border-radius: 12px;
    background: rgba(247, 250, 255, 0.96);
    color: #122033;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

select,
textarea {
    padding: 12px 14px;
    border: 1px solid rgba(166, 196, 224, 0.24);
    border-radius: 12px;
    background: rgba(247, 250, 255, 0.96);
    color: #122033;
}

button[type="submit"] {
    border: none;
    border-radius: 12px;
    background: linear-gradient(135deg, #ffffff 0%, #d8e9ff 100%);
    color: #0e1726;
    padding: 14px 18px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 12px 28px rgba(21, 35, 52, 0.16);
    transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease;
}

button[type="submit"]:hover {
    filter: brightness(0.98);
    transform: translateY(-1px);
    box-shadow: 0 14px 32px rgba(21, 35, 52, 0.2);
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    margin-bottom: 20px;
    padding: 0 20px;
}

#navbar {
    position: sticky;
    top: 0;
    z-index: 1100;
}

#navbar:empty {
    display: none;
}

.nav-container {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    border: 1px solid rgba(145, 181, 215, 0.16);
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(5, 20, 48, 0.9), rgba(9, 45, 92, 0.9));
    box-shadow: var(--site-shadow);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    max-width: 1320px;
    margin: 0 auto;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-right: auto;
    color: #ffffff;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.brand:hover {
    text-decoration: none;
    opacity: 1;
}

.brand-text {
    font-size: 1rem;
    font-weight: 800;
    white-space: nowrap;
}

.nav-toggle {
    display: none;
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    border-radius: 12px;
    padding: 8px 12px;
    font-weight: 700;
    cursor: pointer;
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: nowrap;
    justify-content: flex-end;
    gap: 8px;
}

.nav-links a {
    color: rgba(247, 251, 255, 0.96);
    font-weight: 600;
    padding: 9px 13px;
    border-radius: 12px;
    border: 1px solid transparent;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.nav-links a:hover {
    text-decoration: none;
    background: rgba(255, 255, 255, 0.14);
    transform: translateY(-1px);
}

.nav-links a.is-active {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.42);
    color: #ffffff;
    box-shadow: inset 0 -2px 0 rgba(255, 255, 255, 0.2);
}

.nav-links a.nav-logout,
.nav-links li:last-child a[href="#"] {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.34);
    color: #ffffff;
}

.nav-links a.nav-logout:hover,
.nav-links li:last-child a[href="#"]:hover {
    background: rgba(255, 255, 255, 0.2);
}

.nav-links a.nav-login {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.36);
    color: #ffffff;
}

.nav-links a.nav-login:hover {
    background: rgba(255, 255, 255, 0.22);
}

footer {
    padding: 28px 20px 34px;
    color: rgba(236, 245, 255, 0.72);
}

footer .nav-container {
    justify-content: center;
    padding: 16px 18px;
}

@media (min-width: 901px) {
    .nav-toggle {
        display: none !important;
    }

    .nav-links {
        display: flex !important;
    }
}

@media (max-width: 900px) {
    .site-nav {
        padding: 0 10px;
    }

    .nav-container {
        flex-wrap: wrap;
        align-items: stretch;
        padding: 12px;
        border-radius: 14px;
        gap: 10px;
    }

    .brand {
        flex: 1 1 auto;
        min-width: 0;
    }

    .brand-text {
        font-size: 0.94rem;
        max-width: 170px;
        white-space: normal;
        line-height: 1.2;
    }

    .nav-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 44px;
        padding: 10px 14px;
    }

    .nav-links {
        display: none;
        flex-wrap: wrap;
        width: 100%;
        padding-top: 8px;
        border-top: 1px solid rgba(255, 255, 255, 0.14);
    }

    .site-nav.nav-open .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-start;
        order: 3;
    }

    .nav-links li {
        flex: 1 1 calc(50% - 6px);
        min-width: 140px;
    }

    .nav-links a {
        display: inline-flex;
        width: 100%;
        min-height: 44px;
        align-items: center;
        justify-content: center;
        border-radius: 9px;
        background: rgba(255, 255, 255, 0.08);
    }
}

@media (max-width: 560px) {
    .site-nav {
        margin-bottom: 16px;
        padding: 0 8px;
    }

    .nav-container {
        padding: 10px;
        border-radius: 12px;
    }

    .brand-text {
        font-size: 0.88rem;
        max-width: 140px;
    }

    .card {
        padding: 16px;
        border-radius: 14px;
    }

    .grid-container {
        gap: 18px;
        padding: 16px 12px;
    }

    form {
        max-width: 100%;
    }

    input[type="text"],
    input[type="email"],
    input[type="password"] {
        padding: 11px 12px;
    }

    button[type="submit"] {
        padding: 12px 14px;
    }

    .nav-links li {
        flex: 1 1 100%;
    }
}

@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) {
    .grid-container {
        grid-template-columns: repeat(2, minmax(280px, 1fr));
    }
}

@media (min-width: 1024px) {
    .grid-container {
        grid-template-columns: repeat(3, minmax(280px, 1fr));
    }
}