:root {
    color-scheme: dark;
    --bg: #07111f;
    --panel: rgba(8, 19, 36, 0.86);
    --panel-strong: rgba(11, 28, 52, 0.96);
    --text: #eaf2ff;
    --muted: #9ab0d1;
    --border: rgba(120, 157, 215, 0.22);
    --accent: #6ea8ff;
    --accent-2: #76f7d4;
    --success: #70e28b;
    --danger: #ff8383;
    --warning: #ffcc73;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }
body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top, rgba(110, 168, 255, 0.2), transparent 34%),
        radial-gradient(circle at right, rgba(118, 247, 212, 0.12), transparent 28%),
        linear-gradient(180deg, #08111e 0%, #040a14 100%);
}

a { color: inherit; }

.shell {
    width: min(100%, 960px);
    margin: 0 auto;
    padding: 32px 20px 56px;
}

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

.hero {
    text-align: center;
    margin-bottom: 28px;
}

.hero img {
    width: min(100%, 320px);
    height: auto;
    filter: drop-shadow(0 16px 30px rgba(0, 0, 0, 0.35));
}

.logo {
  width: 900px;
  height: auto;
}

.hero h1 {
    margin: 14px 0 10px;
    font-size: clamp(2rem, 5vw, 3.25rem);
    line-height: 1.05;
}

.hero p {
    margin: 0 auto;
    width: min(100%, 720px);
    color: var(--muted);
    font-size: 1.02rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
}

.card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    padding: 22px;
}

.card h2 {
    margin-top: 0;
    margin-bottom: 14px;
    font-size: 1.25rem;
}

.label {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 0.95rem;
}

.input, textarea {
    width: 100%;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    padding: 14px 16px;
    font-size: 1rem;
    outline: none;
}

.input:focus, textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(110, 168, 255, 0.12);
}

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

.actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 16px;
}

button, .button-secondary {
    appearance: none;
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    font-weight: 700;
    font-size: 0.96rem;
    cursor: pointer;
}

button {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #06101d;
}

.button-secondary {
    text-decoration: none;
    background: rgba(255,255,255,0.07);
    color: var(--text);
}

.result {
    border-radius: 16px;
    padding: 16px 18px;
    margin-bottom: 18px;
    border: 1px solid transparent;
}

.result.ok {
    background: rgba(112, 226, 139, 0.10);
    color: #c9ffd4;
    border-color: rgba(112, 226, 139, 0.30);
}

.result.bad {
    background: rgba(255, 131, 131, 0.10);
    color: #ffd1d1;
    border-color: rgba(255, 131, 131, 0.28);
}

.result.warn {
    background: rgba(255, 204, 115, 0.10);
    color: #ffe3b0;
    border-color: rgba(255, 204, 115, 0.28);
}

.meta {
    display: grid;
    gap: 10px;
    margin-top: 14px;
}

.meta-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.meta-row:last-child { border-bottom: 0; }
.meta-row span:first-child { color: var(--muted); }

.footer {
    margin-top: 24px;
    text-align: center;
    color: var(--muted);
    font-size: 0.93rem;
}

.kbd {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 999px;
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.08);
    font-size: 0.88rem;
}