:root {
    --bg: #05041f;
    --bg-2: #090735;
    --panel: rgba(10, 8, 76, .84);
    --panel-strong: rgba(7, 6, 43, .94);
    --line: rgba(124, 226, 255, .18);
    --line-strong: rgba(255, 255, 255, .14);
    --pink: #ff52d7;
    --cyan: #38dfff;
    --white: #f8f8ff;
    --muted: rgba(248, 248, 255, .76);
    --good: #6ef3cf;
    --bad: #ff8aaa;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, "Noto Sans JP", sans-serif;
    color: var(--white);
    background:
        radial-gradient(circle at top left, rgba(255, 82, 215, .24), transparent 26%),
        radial-gradient(circle at top right, rgba(56, 223, 255, .18), transparent 24%),
        linear-gradient(180deg, #0a0831 0%, var(--bg) 55%, #03030f 100%);
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input {
    font: inherit;
}

.secret-body {
    display: grid;
    place-items: center;
    padding: 24px;
}

.secret-shell,
.game-shell {
    width: min(1180px, 100%);
}

.secret-body .secret-shell {
    display: grid;
    place-items: center;
    min-height: calc(100vh - 48px);
}

.secret-panel {
    background: linear-gradient(180deg, rgba(14, 12, 82, .9), rgba(8, 6, 48, .92));
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: clamp(24px, 4vw, 44px);
    box-shadow: 0 24px 80px rgba(0, 0, 0, .36);
    backdrop-filter: blur(18px);
}

.secret-panel-login {
    width: min(680px, 100%);
    margin: 0 auto;
}

.secret-panel-wide {
    min-height: 520px;
}

.secret-kicker {
    margin: 0 0 12px;
    font-size: 12px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--cyan);
}

.secret-panel h1,
.game-intro h1 {
    margin: 0;
    line-height: 1.08;
    letter-spacing: -.04em;
}

.secret-panel h1 {
    font-size: clamp(34px, 4vw, 58px);
}

.secret-copy {
    margin: 16px 0 0;
    max-width: 46rem;
    color: var(--muted);
    line-height: 1.8;
}

.secret-alert,
.secret-success {
    margin-top: 22px;
    padding: 14px 16px;
    border-radius: 12px;
    border: 1px solid var(--line-strong);
    line-height: 1.6;
}

.secret-alert {
    background: rgba(255, 82, 215, .12);
    color: #ffd4f4;
}

.secret-success {
    background: rgba(56, 223, 255, .12);
    color: #d6fbff;
}

.secret-form {
    display: grid;
    gap: 16px;
    margin-top: 28px;
    max-width: 560px;
}

.secret-form h2 {
    margin: 6px 0 0;
    font-size: 20px;
}

.secret-form label,
.game-input-label {
    display: grid;
    gap: 8px;
}

.secret-form span,
.game-input-label span {
    font-size: 13px;
    color: rgba(248, 248, 255, .78);
}

.secret-form input,
.game-input-label input {
    width: 100%;
    min-height: 54px;
    border: 1px solid rgba(255, 255, 255, .16);
    border-radius: 14px;
    background: rgba(3, 3, 24, .66);
    color: var(--white);
    padding: 14px 16px;
    outline: none;
}

.secret-form input:focus,
.game-input-label input:focus {
    border-color: rgba(56, 223, 255, .9);
    box-shadow: 0 0 0 4px rgba(56, 223, 255, .14);
}

.secret-form button,
.secret-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 22px;
    border: 0;
    border-radius: 14px;
    background: linear-gradient(100deg, var(--pink), #827dff 56%, var(--cyan));
    color: #fff;
    font-weight: 800;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease, opacity .18s ease;
    box-shadow: 0 14px 30px rgba(0, 0, 0, .26);
}

.secret-form button:hover,
.secret-button:hover {
    transform: translateY(-2px);
}

.secret-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: rgba(248, 248, 255, .84);
}

.secret-links,
.game-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 24px;
}

.admin-grid,
.game-layout {
    display: grid;
    gap: 18px;
}

.admin-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 24px;
}

.game-body {
    align-items: start;
    padding: 18px;
}

.game-shell {
    padding: 12px 0 24px;
}

.game-hero {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 16px;
}

.game-intro h1 {
    font-size: clamp(42px, 5vw, 78px);
}

.game-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.game-stat {
    min-width: 140px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--line-strong);
}

.game-stat span {
    display: block;
    font-size: 12px;
    color: rgba(248, 248, 255, .64);
    margin-bottom: 8px;
}

.game-stat strong {
    display: block;
    font-size: 20px;
}

.game-layout {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: start;
}

.game-panel {
    border-radius: 18px;
    padding: clamp(22px, 3vw, 32px);
    background: linear-gradient(180deg, rgba(14, 12, 82, .9), rgba(8, 6, 48, .92));
    border: 1px solid var(--line);
    box-shadow: 0 24px 80px rgba(0, 0, 0, .32);
    backdrop-filter: blur(18px);
}

.game-help {
    margin: 14px 0 0;
    color: var(--muted);
}

.game-clear-state {
    margin-top: 20px;
    padding: 16px;
    border-radius: 16px;
    background: rgba(110, 243, 207, .08);
    border: 1px solid rgba(110, 243, 207, .22);
}

.game-clear-state strong {
    display: block;
    color: var(--good);
}

.game-clear-state p {
    margin: 8px 0 12px;
    color: var(--muted);
}

.game-code {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 18px;
    min-height: 52px;
    border-radius: 14px;
    background: rgba(5, 4, 31, .8);
    border: 1px solid rgba(255, 255, 255, .14);
    letter-spacing: .06em;
    font-size: 18px;
    font-weight: 800;
}

.game-error {
    margin-top: 16px;
    color: var(--bad);
}

.game-rules-head h2 {
    margin: 0;
    font-size: 24px;
}

.game-rules-head p {
    margin: 8px 0 0;
    color: var(--muted);
}

.rule-focus {
    margin-top: 18px;
    padding: 18px;
    border-radius: 16px;
    background: rgba(255, 255, 255, .04);
    border: 1px solid rgba(255, 255, 255, .08);
    display: grid;
    gap: 10px;
    min-height: 128px;
    align-content: start;
}

.rule-number {
    font-size: 12px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--cyan);
}

.rule-text {
    margin: 0;
    font-size: 20px;
    line-height: 1.5;
}

.rule-focus b {
    color: rgba(248, 248, 255, .56);
    font-weight: 700;
}

.game-footer {
    justify-content: space-between;
    padding-top: 16px;
}

code {
    padding: 0 .35em;
    border-radius: 8px;
    background: rgba(255, 255, 255, .08);
}

@media (max-width: 900px) {
    .game-hero {
        align-items: start;
        flex-direction: column;
    }

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

@media (max-width: 680px) {
    .secret-body,
    .game-body {
        padding: 14px;
    }

    .rule-text {
        font-size: 18px;
    }

    .game-stat {
        min-width: 0;
        flex: 1 1 120px;
    }
}