* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

:root {
    --bg: #0b1020;
    --bg2: #0b2a4a;
    --card: rgba(255, 255, 255, 0.92);
    --text: #111827;
    --muted: #4b5563;
    --border: rgba(17, 24, 39, 0.12);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #b91c1c;
    --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --radius: 14px;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    color: var(--text);
    background: radial-gradient(1000px 600px at 20% 0%, rgba(37, 99, 235, 0.45), transparent 60%),
        radial-gradient(900px 700px at 90% 30%, rgba(6, 182, 212, 0.35), transparent 55%),
        linear-gradient(120deg, var(--bg), var(--bg2));
    padding: 20px;
}

body.dark-mode {
    --card: rgba(17, 24, 39, 0.9);
    --text: #e5e7eb;
    --muted: #9ca3af;
    --border: rgba(229, 231, 235, 0.12);
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
}

code {
    font-family: var(--mono);
    font-size: 0.95em;
}

.app-header {
    max-width: 1100px;
    margin: 0 auto 18px auto;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 18px;
    border: 1px solid var(--border);
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.logo {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    object-fit: cover;
    border: 1px solid var(--border);
}

h1 {
    margin: 0;
    font-size: 1.35rem;
    letter-spacing: 0.2px;
}

.subtitle {
    margin: 4px 0 0 0;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.2;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    gap: 14px;
}

.card {
    border: 1px solid var(--border);
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 16px;
    backdrop-filter: blur(10px);
}

.status {
    min-height: 20px;
    color: var(--muted);
    margin-bottom: 10px;
}

.status.error {
    color: #fecaca;
}

.settings {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 16px;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 14px;
}

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

.field label {
    color: var(--muted);
    font-weight: 600;
    font-size: 0.92rem;
}

select {
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
}

.check {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--muted);
    user-select: none;
}

.check input {
    width: 18px;
    height: 18px;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.panel {
    display: flex;
    flex-direction: column;
    gap: 8px;
}



textarea {
    width: 100%;
    min-height: 220px;
    padding: 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    font-family: var(--mono);
    font-size: 0.95rem;
    line-height: 1.35;
    resize: vertical;
}

textarea:focus,
select:focus,
button:focus {
    outline: 2px solid rgba(37, 99, 235, 0.55);
    outline-offset: 2px;
}

.button-row {
    display: flex;
    gap: 12px;
}

.button {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px 12px;
    cursor: pointer;
    font-weight: 700;
    background: transparent;
    color: var(--text);
}

.button.primary {
    background: var(--primary);
    border-color: rgba(0, 0, 0, 0);
    color: #ffffff;
}

.button.primary:hover {
    background: var(--primary-hover);
}

.button.secondary:hover {
    background: rgba(255, 255, 255, 0.08);
}

.stats {
    margin-top: 8px;
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: var(--muted);
    font-size: 0.9rem;
}

h2 {
    margin: 0 0 8px 0;
    font-size: 1.05rem;
}

.hint {
    margin: 0 0 10px 0;
    color: var(--muted);
}

.preview {
    width: 100%;
    height: 260px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(0, 0, 0, 0.06);
}

ul.suggestions {
    margin: 0;
    padding-left: 18px;
    color: var(--muted);
    display: grid;
    gap: 6px;
}

.footer {
    max-width: 1100px;
    margin: 12px auto 0 auto;
    color: rgba(255, 255, 255, 0.85);
    text-align: center;
}

.footer code {
    color: rgba(255, 255, 255, 0.95);
}

@media (max-width: 900px) {
    .grid {
        grid-template-columns: 1fr;
    }

    .stats {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-inner {
        flex-direction: column;
        align-items: stretch;
    }
}