:root {
    --bg: #eef0fb;
    --surface: #ffffff;
    --glow-1: rgb(99 102 241 / 0.22);
    --glow-2: rgb(20 184 166 / 0.18);
    --glow-3: rgb(236 72 153 / 0.08);
    --dot: rgb(67 56 202 / 0.08);
    --text: #1c1f33;
    --muted: #5d6280;
    --border: #e0e2f2;
    --accent: #4f46e5;
    --accent-2: #14b8a6;
    --accent-3: #ec4899;
    --danger: #c8362e;
    --danger-soft: #fdecea;
    --radius: 14px;
    color-scheme: light;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0d0f1e;
        --surface: #161a2e;
        --glow-1: rgb(99 102 241 / 0.24);
        --glow-2: rgb(20 184 166 / 0.13);
        --glow-3: rgb(236 72 153 / 0.07);
        --dot: rgb(199 210 254 / 0.06);
        --text: #e8e9f5;
        --muted: #9ea2c0;
        --border: #272b47;
        --accent: #818cf8;
        --accent-2: #2dd4bf;
        --accent-3: #f472b6;
        --danger: #ff6b61;
        --danger-soft: #3a1f1e;
        color-scheme: dark;
    }
}

*, *::before, *::after { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px 16px;
    background: var(--bg);
    color: var(--text);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}
body::before {
    background:
        radial-gradient(60vmax 45vmax at 0% 0%, var(--glow-1), transparent 70%),
        radial-gradient(35vmax 30vmax at 100% 30%, var(--glow-3), transparent 70%),
        radial-gradient(50vmax 40vmax at 100% 100%, var(--glow-2), transparent 70%);
}
body::after {
    background-image: radial-gradient(var(--dot) 1px, transparent 1.5px);
    background-size: 22px 22px;
    -webkit-mask-image: linear-gradient(to bottom, #000, transparent 85%);
    mask-image: linear-gradient(to bottom, #000, transparent 85%);
}

#app {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.state { display: none; }
#app[data-state="loading"] .state--loading,
#app[data-state="error"]   .state--error,
#app[data-state="ready"]   .state--ready { display: flex; }

.card {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 16px;
    width: min(420px, 100%);
    padding: 40px 32px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgb(0 0 0 / 0.06);
}
.card h1 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
}
.card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.button {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    transition: filter .15s, transform .15s;
}
.button:hover  { filter: brightness(1.08); }
.button:active { transform: translateY(1px); }
.button:focus-visible {
    outline: 3px solid var(--accent-2);
    outline-offset: 2px;
}