:root {
    --radius: 18px;
    --bg: #fef5f8;
    --text: #2d1b2e;
    --muted: #7a6b7c;
    --accent: #ff6b9d;
    --accent-2: #ffa06b;
    --accent-3: #ffcd6b;
    --shadow: 0 4px 20px rgba(255, 107, 157, 0.15);
    --card-shadow: 0 2px 12px rgba(255, 107, 157, 0.1);
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Noto Sans JP, Ubuntu, Cantarell, "Helvetica Neue", "Hiragino Kaku Gothic ProN", Meiryo, Arial, sans-serif;
    background: radial-gradient(circle at 20% 20%, #fff0f5 0%, #fef5f8 40%, #fefaee 100%);
    color: var(--text);
    line-height: 1.6;
    display: grid;
    grid-template-rows: auto 1fr auto;
    min-height: 100vh;
}

header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: saturate(140%) blur(12px);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.85));
    border-bottom: 2px solid rgba(255, 107, 157, 0.15);
    box-shadow: 0 2px 8px rgba(255, 107, 157, 0.08);
}

.wrap {
    width: min(1100px, 92vw);
    margin: 0 auto;
    padding: 14px 0;
}

nav {
    display: flex;
    gap: 10px;
    align-items: center;
}

.brand {
    font-weight: 700;
    letter-spacing: .02em;
    margin-right: auto;
}

.nav-link {
    padding: 10px 14px;
    border-radius: 999px;
    transition: .2s ease;
    color: var(--text);
    text-decoration: none;
    opacity: .85;
    font-weight: 500;
}

.nav-link:hover {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.15), rgba(255, 160, 107, 0.15));
    opacity: 1;
    transform: translateY(-1px);
}


main {
    padding: 36px 0 60px;
}

.panel {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 250, 253, 0.85));
    border: 2px solid rgba(255, 107, 157, 0.2);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: min(6vw, 32px);
}


h1 {
    margin: 0 0 6px 0;
    font-size: clamp(22px, 3vw, 30px);
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

.muted {
    color: var(--muted);
    font-size: .95rem;
}


.grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 248, 252, 0.9));
    border: 2px solid rgba(255, 107, 157, 0.25);
    border-radius: 16px;
    padding: 20px;
    transition: .3s ease;
    box-shadow: var(--card-shadow);
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 107, 157, 0.5);
    box-shadow: 0 6px 24px rgba(255, 107, 157, 0.2);
}

.card h3 {
    margin-top: 0;
    color: var(--accent);
    font-weight: 700;
}

.btn {
    appearance: none;
    border: none;
    cursor: pointer;
    font-weight: 700;
    padding: 12px 20px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.15), rgba(255, 160, 107, 0.15));
    color: var(--text);
    transition: transform .06s ease, background .2s ease, box-shadow .2s ease;
    border: 2px solid rgba(255, 107, 157, 0.3);
}

.btn:hover {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.25), rgba(255, 160, 107, 0.25));
    box-shadow: 0 4px 12px rgba(255, 107, 157, 0.2);
}

.btn:active {
    transform: translateY(1px);
}

.btn.primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2), var(--accent-3));
    color: #ffffff;
    border: none;
    box-shadow: 0 4px 12px rgba(255, 107, 157, 0.3);
}

.btn.primary:hover {
    box-shadow: 0 6px 20px rgba(255, 107, 157, 0.4);
    transform: translateY(-2px);
}


.result {
    margin-top: 18px;
    background: linear-gradient(135deg, rgba(255, 250, 253, 0.8), rgba(255, 255, 255, 0.9));
    border: 2px solid rgba(255, 107, 157, 0.25);
    border-radius: 14px;
    padding: 20px;
    box-shadow: var(--card-shadow);
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 999px;
    font-weight: 800;
    letter-spacing: .06em;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(255, 107, 157, 0.3);
}

.desc-list {
    margin: 10px 0 0 0;
    padding-left: 18px;
}


.row {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.spacer {
    flex: 1;
}


.loading {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    opacity: .9;
    color: var(--accent);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    animation: blink 1.2s infinite ease-in-out;
    box-shadow: 0 2px 4px rgba(255, 107, 157, 0.3);
}

.dot:nth-child(2) {
    animation-delay: .15s;
}

.dot:nth-child(3) {
    animation-delay: .3s;
}

@keyframes blink {

    0%,
    80%,
    100% {
        opacity: .3;
        transform: scale(0.8);
    }

    40% {
        opacity: 1;
        transform: scale(1.1);
    }
}


footer {
    color: var(--muted);
    font-size: .9rem;
    padding: 18px 0 40px;
}

code {
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.1), rgba(255, 160, 107, 0.1));
    padding: 3px 8px;
    border-radius: 6px;
    border: 1px solid rgba(255, 107, 157, 0.2);
    font-family: 'Courier New', monospace;
}


/* Responsive tweaks */
@media (max-width: 480px) {
    .wrap {
        width: 92vw;
    }

    nav {
        gap: 6px;
    }
}