:root {
    --color-primary: #0b2a4a;
    --color-secondary: #123e67;
    --color-accent: #2d8cff;
    --color-bg: #061523;
    --color-card: #0d2238;
    --color-text: #eaf3ff;
    --color-muted: #9cb3c9;
    --color-border: #1b3a5a;
    --color-wanted: #ff4d4f;
    --color-success: #2eb67d;
    --color-warning: #f5a524;
    --color-danger: #e5484d;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    --shadow-soft: 0 12px 30px rgba(0, 0, 0, 0.22);
    --shadow-card: 0 8px 20px rgba(0, 0, 0, 0.2);
}

html {
    color-scheme: dark;
    background: radial-gradient(120% 120% at 5% 0%, #0e3154 0%, #061523 45%, #04111d 100%);
}

html[data-theme="light"] {
    color-scheme: light;
    --color-bg: #f2f7fd;
    --color-card: #ffffff;
    --color-text: #12263a;
    --color-muted: #4e6477;
    --color-border: #c9d8e7;
    --color-primary: #164979;
    --color-secondary: #2b679f;
    --color-accent: #1c73db;
    --shadow-soft: 0 10px 24px rgba(20, 58, 97, 0.12);
    --shadow-card: 0 6px 16px rgba(20, 58, 97, 0.1);
    background: radial-gradient(110% 110% at 0% 0%, #deebf8 0%, #f3f8fd 52%, #ffffff 100%);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Helvetica Neue", sans-serif;
    color: var(--color-text);
    background: transparent;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.45;
}

a {
    color: var(--color-accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.page-shell {
    width: min(1200px, calc(100% - 2rem));
    margin: 1.2rem auto 2rem;
    flex: 1;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(8px);
    background: color-mix(in srgb, var(--color-bg) 90%, transparent);
}

.topbar-inner {
    width: min(1200px, calc(100% - 2rem));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
    color: inherit;
}

.brand-link:hover {
    text-decoration: none;
}

.brand-logo {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 50%;
    border: 1px solid var(--color-border);
}

.brand-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.brand-title {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.brand-subtitle {
    font-size: 0.78rem;
    color: var(--color-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topnav {
    margin-left: auto;
}

.nav-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.nav-list a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.45rem 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    color: var(--color-text);
    font-size: 0.9rem;
}

.nav-list a:hover,
.nav-list a.active {
    text-decoration: none;
    border-color: var(--color-border);
    background: color-mix(in srgb, var(--color-primary) 24%, transparent);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.user-chip {
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 0.8rem;
    white-space: nowrap;
}

.nav-toggle,
.theme-toggle,
.btn {
    appearance: none;
    border: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-card) 90%, transparent);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    padding: 0.48rem 0.8rem;
    font-size: 0.9rem;
    cursor: pointer;
}

.nav-toggle {
    display: none;
}

.theme-toggle:hover,
.nav-toggle:hover,
.btn:hover {
    filter: brightness(1.05);
}

.btn-sm {
    padding: 0.38rem 0.68rem;
    font-size: 0.82rem;
}

.btn-accent {
    border-color: color-mix(in srgb, var(--color-accent) 60%, var(--color-border));
    background: color-mix(in srgb, var(--color-accent) 22%, transparent);
}

.btn-primary {
    border-color: color-mix(in srgb, var(--color-primary) 70%, var(--color-border));
    background: color-mix(in srgb, var(--color-primary) 28%, transparent);
}

.btn-danger {
    border-color: color-mix(in srgb, var(--color-danger) 60%, var(--color-border));
    background: color-mix(in srgb, var(--color-danger) 20%, transparent);
}

.card,
.panel,
.table-wrap,
.modal-content,
.auth-panel {
    background: color-mix(in srgb, var(--color-card) 94%, transparent);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-card);
}

.section-title {
    margin: 0 0 0.85rem;
    font-size: 1.15rem;
    font-weight: 700;
}

.muted {
    color: var(--color-muted);
}

.grid {
    display: grid;
    gap: 1rem;
}

.subject-grid {
    grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
}

.subject-card {
    position: relative;
    overflow: hidden;
    padding: 0.95rem;
}

.subject-card.is-wanted {
    border-color: color-mix(in srgb, var(--color-wanted) 70%, var(--color-border));
    box-shadow: 0 0 0 1px color-mix(in srgb, var(--color-wanted) 45%, transparent), 0 0 26px color-mix(in srgb, var(--color-wanted) 36%, transparent);
}

.wanted-banner {
    position: absolute;
    top: 0.65rem;
    right: -2.3rem;
    width: 9rem;
    text-align: center;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    font-weight: 800;
    text-transform: uppercase;
    padding: 0.2rem 0;
    background: var(--color-wanted);
    color: #fff;
    transform: rotate(32deg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.32rem;
    padding: 0.2rem 0.62rem;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    font-size: 0.78rem;
    color: var(--color-text);
}

.status-wanted {
    border-color: color-mix(in srgb, var(--color-wanted) 70%, var(--color-border));
    background: color-mix(in srgb, var(--color-wanted) 16%, transparent);
}

.status-success {
    border-color: color-mix(in srgb, var(--color-success) 60%, var(--color-border));
    background: color-mix(in srgb, var(--color-success) 15%, transparent);
}

.status-warning {
    border-color: color-mix(in srgb, var(--color-warning) 60%, var(--color-border));
    background: color-mix(in srgb, var(--color-warning) 15%, transparent);
}

.status-danger {
    border-color: color-mix(in srgb, var(--color-danger) 60%, var(--color-border));
    background: color-mix(in srgb, var(--color-danger) 15%, transparent);
}

.table-wrap {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    min-width: 680px;
}

.table th,
.table td {
    border-bottom: 1px solid var(--color-border);
    padding: 0.72rem 0.7rem;
    text-align: left;
    font-size: 0.9rem;
}

.table th {
    color: var(--color-muted);
    font-weight: 600;
    background: color-mix(in srgb, var(--color-primary) 17%, transparent);
}

.form-grid {
    display: grid;
    gap: 0.85rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

label {
    font-size: 0.86rem;
    color: var(--color-muted);
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid var(--color-border);
    background: color-mix(in srgb, var(--color-card) 88%, transparent);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    padding: 0.58rem 0.66rem;
    font: inherit;
}

textarea {
    resize: vertical;
    min-height: 110px;
}

input:focus,
select:focus,
textarea:focus,
button:focus,
a:focus {
    outline: 2px solid color-mix(in srgb, var(--color-accent) 60%, transparent);
    outline-offset: 1px;
}

.auth-page {
    display: grid;
    flex: 1;
    place-items: center;
    padding: 1.4rem 0;
}

.auth-panel {
    width: min(520px, 100%);
    padding: 1.15rem;
}

.auth-title {
    margin: 0 0 0.4rem;
    font-size: 1.25rem;
}

.auth-subtitle {
    margin: 0 0 1rem;
    color: var(--color-muted);
}

.admin-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 1rem;
}

.admin-sidebar,
.admin-main {
    min-width: 0;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: rgba(2, 10, 18, 0.72);
}

.modal[aria-hidden="false"] {
    display: flex;
}

.modal-content {
    width: min(720px, 100%);
    max-height: 88vh;
    overflow: auto;
    padding: 1rem;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 0.65rem;
    right: 0.65rem;
}

.site-footer {
    border-top: 1px solid var(--color-border);
    margin-top: auto;
    background: color-mix(in srgb, var(--color-card) 78%, transparent);
}

.footer-inner {
    width: min(1200px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 0.92rem 0;
    display: grid;
    gap: 0.5rem;
    grid-template-columns: 1fr auto auto;
    align-items: center;
}

.footer-title {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 700;
}

.footer-note {
    margin: 0.2rem 0 0;
    color: var(--color-muted);
    font-size: 0.78rem;
}

.footer-nav {
    display: inline-flex;
    gap: 0.7rem;
    flex-wrap: wrap;
}

.footer-nav a {
    color: var(--color-muted);
    font-size: 0.82rem;
}

.footer-meta {
    color: var(--color-muted);
    font-size: 0.8rem;
    text-align: right;
}

@media (max-width: 1024px) {
    .topbar-inner,
    .page-shell,
    .footer-inner {
        width: calc(100% - 1.2rem);
    }

    .admin-layout {
        grid-template-columns: 1fr;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 860px) {
    .nav-toggle {
        display: inline-flex;
    }

    .topnav {
        display: none;
        width: 100%;
        margin: 0.5rem 0 0;
        border-top: 1px solid var(--color-border);
        padding-top: 0.5rem;
    }

    .topbar-inner {
        flex-wrap: wrap;
        padding: 0.5rem 0;
    }

    .topnav.is-open {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
    }

    .nav-list a {
        width: 100%;
        justify-content: flex-start;
    }

    .topbar-actions {
        margin-left: auto;
    }

    .footer-inner {
        grid-template-columns: 1fr;
    }

    .footer-meta {
        text-align: left;
    }
}