:root {
    --primary: #FF6900;
    --bg: #f9fafb;
    --text: #1f2933;
    --muted: #6b7280;
    --success: #16a34a;
    --error: #dc2626;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.card {
    width: 100%;
    max-width: 480px;
    background: #ffffff;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

h1 {
    margin: 0 0 8px;
    font-size: 1.8rem;
}

.subtitle {
    margin-bottom: 24px;
    color: var(--muted);
    font-size: 0.95rem;
}

.input-group {
    display: flex;
    gap: 8px;
}

input {
    flex: 1;
    padding: 14px;
    font-size: 1rem;
    border-radius: 8px;
    border: 1px solid #e5e7eb;
    outline: none;
}

input:focus {
    border-color: var(--primary);
}

button {
    padding: 14px 20px;
    font-size: 1rem;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#feedback {
    margin-top: 16px;
    font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 480px) {
    .input-group {
        flex-direction: column;
    }

    button {
        width: 100%;
    }
}