:root {
    --sky: #abdee6;
    --lilac: #cbaacb;
    --lemon: #ffffb5;
    --peach: #ffccb6;
    --pink: #f3b0c3;
    --mist: #c6dbda;
    --blush: #fee1e8;
    --apricot: #fed7c3;
    --cream: #f6eac2;
    --mauve: #ecd5e3;
    --salmon: #ffc5bf;
    --coral: #ff968a;
    --melon: #ffaea5;
    --sand: #ffdbbe;
    --tangerine: #ffc8a2;
    --aqua: #04f0f0;
    --teal: #8fcaca;
    --mint: #cce2cb;
    --sage: #b6cfb6;
    --leaf: #97c1a9;
    --shell: #fcb9aa;
    --ivory: #ffdbcc;
    --paper: #eceae4;
    --foam: #a2e1db;
    --lagoon: #55cbcd;
    --ink: #3e4a4a;
    --muted: #5f7070;
    --line: #c6dbda;
    --card: #ffffff;
}

body {
    min-height: 100vh;
    color: var(--ink);
    background:
        radial-gradient(circle at 0 0, var(--blush) 0, transparent 28rem),
        radial-gradient(circle at 100% 0, var(--sky) 0, transparent 26rem),
        radial-gradient(circle at 80% 100%, var(--lemon) 0, transparent 24rem),
        var(--paper);
}

.btn-primary {
    --bs-btn-color: #244040;
    --bs-btn-bg: var(--teal);
    --bs-btn-border-color: var(--teal);
    --bs-btn-hover-color: #1c3333;
    --bs-btn-hover-bg: var(--foam);
    --bs-btn-hover-border-color: var(--foam);
    --bs-btn-focus-shadow-rgb: 143, 202, 202;
    --bs-btn-active-color: #1c3333;
    --bs-btn-active-bg: var(--lagoon);
    --bs-btn-active-border-color: var(--lagoon);
    --bs-btn-disabled-color: #244040;
    --bs-btn-disabled-bg: var(--teal);
    --bs-btn-disabled-border-color: var(--teal);
}

.btn-outline-secondary {
    --bs-btn-color: #4d4560;
    --bs-btn-border-color: var(--lilac);
    --bs-btn-hover-color: #3d3550;
    --bs-btn-hover-bg: var(--mauve);
    --bs-btn-hover-border-color: var(--lilac);
    --bs-btn-active-color: #3d3550;
    --bs-btn-active-bg: var(--lilac);
    --bs-btn-active-border-color: var(--lilac);
    --bs-btn-disabled-color: #4d4560;
    --bs-btn-disabled-border-color: var(--lilac);
}

.btn-outline-danger {
    --bs-btn-color: #8a4038;
    --bs-btn-border-color: var(--coral);
    --bs-btn-hover-color: #6e322c;
    --bs-btn-hover-bg: var(--salmon);
    --bs-btn-hover-border-color: var(--coral);
    --bs-btn-active-color: #6e322c;
    --bs-btn-active-bg: var(--melon);
    --bs-btn-active-border-color: var(--coral);
}

.form-control {
    border-color: var(--mist);
    background: #fff;
    color: var(--ink);
}

.form-control:focus {
    border-color: var(--sky);
    box-shadow: 0 0 0 0.2rem rgba(171, 222, 230, 0.55);
}

.card {
    background: var(--card);
    border-radius: 1.25rem;
    box-shadow: 0 16px 40px rgba(143, 202, 202, 0.18);
}

.eyebrow {
    margin: 0;
    color: var(--lagoon);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.login-screen {
    min-height: 100vh;
}

.login-card {
    width: min(100%, 26rem);
}

.form-error,
.scan-result {
    min-height: 1.25rem;
    margin-top: 0.85rem;
    color: var(--coral);
}

.scan-result.is-ok {
    color: #3f7a62;
}

.pastel-nav {
    background: rgba(255, 255, 255, 0.82);
    border-bottom: 1px solid var(--mist);
    backdrop-filter: blur(12px);
}

.topbar-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--ink);
}

.note,
.fine {
    color: var(--muted);
}

.viewfinder {
    margin-top: 0.25rem;
    border-radius: 1rem;
    overflow: hidden;
    background:
        linear-gradient(var(--teal), var(--teal)) left top / 18px 2px no-repeat,
        linear-gradient(var(--teal), var(--teal)) left top / 2px 18px no-repeat,
        linear-gradient(var(--teal), var(--teal)) right top / 18px 2px no-repeat,
        linear-gradient(var(--teal), var(--teal)) right top / 2px 18px no-repeat,
        linear-gradient(var(--teal), var(--teal)) left bottom / 18px 2px no-repeat,
        linear-gradient(var(--teal), var(--teal)) left bottom / 2px 18px no-repeat,
        linear-gradient(var(--teal), var(--teal)) right bottom / 18px 2px no-repeat,
        linear-gradient(var(--teal), var(--teal)) right bottom / 2px 18px no-repeat,
        #2f4f4f;
}

.viewfinder:not(:has(video:not([hidden]))) {
    display: none;
}

video {
    display: block;
    width: 100%;
    max-height: 22rem;
    object-fit: cover;
    background: #243838;
}

video[hidden] {
    display: none;
}

.board-list {
    display: grid;
    gap: 0.75rem;
    margin-top: 0.85rem;
}

.board {
    border: 1px solid var(--mist);
    border-radius: 1rem;
    padding: 0.95rem;
    background: #fff;
}

.board-top,
.meta,
.name-row,
.board-actions {
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

.board-top,
.meta {
    justify-content: space-between;
    align-items: flex-start;
}

.name-row {
    flex: 1;
    min-width: 0;
}

.name-row input {
    flex: 1;
    min-width: 0;
}

.board-actions {
    justify-content: flex-start;
    flex-wrap: wrap;
    margin-top: 0.75rem;
}

.code {
    font-family: Consolas, "Cascadia Mono", monospace;
    letter-spacing: 0.12em;
    font-weight: 700;
    color: #3f7d7d;
}

.meta {
    margin: 0.55rem 0 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.state {
    border-radius: 999px;
    padding: 0.25rem 0.7rem;
    font-size: 0.8rem;
    font-weight: 600;
    white-space: nowrap;
    color: #3e4a4a;
}

.is-locked .state { background: var(--peach); }
.is-unlocked .state { background: var(--mint); }
.is-offline .state { background: var(--mauve); }
.is-shutting_down .state { background: var(--salmon); }
.is-pending .state { background: var(--sky); }
.is-rejected .state { background: var(--pink); }

.home-wrap {
    width: min(100%, 58rem);
}

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

@media (min-width: 768px) {
    .choice-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.choice-card {
    color: inherit;
    text-decoration: none;
    height: 100%;
    transition: transform 0.15s ease;
}

.choice-card:hover {
    transform: translateY(-2px);
    color: inherit;
}

.teacher-table {
    --bs-table-bg: transparent;
}

.teacher-table th {
    font-weight: 600;
    color: var(--muted);
}

.key-box {
    font-size: 0.8rem;
    word-break: break-all;
}