:root {
    --primary: #6751D9;
    --primary-light: #7763DD;
    --primary-muted: #C7C4F0;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F1;
    --gray-300: #D5DAE3;
    --text: #64748B;
    --text-dark: #334155;

    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
}

body {
    margin: 0;
    background: linear-gradient(160deg, var(--primary) 0%, var(--primary-light) 50%, var(--primary-muted) 100%);
    min-height: 100vh;
}

.page {
    max-width: 960px;
    margin: 0 auto;
    padding: 48px 16px 80px;
}

.hero {
    color: #ffffff;
    margin-bottom: 32px;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 12px;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin: 0;
}

.card {
    background: #ffffff;
    border-radius: 20px;
    padding: 36px;
    box-shadow: 0 30px 60px rgba(103, 81, 217, 0.25);
    margin-bottom: 32px;
}

form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.field {
    display: block;
}

.field-label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

input[type="text"],
input[type="url"],
textarea {
    width: 100%;
    box-sizing: border-box;
    border-radius: 12px;
    border: 1px solid var(--gray-300);
    padding: 14px 16px;
    font-size: 16px;
    font-family: inherit;
    background-color: var(--gray-100);
    color: var(--text-dark);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus,
input[type="url"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(103, 81, 217, 0.15);
}

input[type="text"]::placeholder,
input[type="url"]::placeholder,
textarea::placeholder {
    color: var(--text);
}

/* Checkbox styling */
.checkbox-field {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding: 16px;
    background: var(--gray-100);
    border-radius: 12px;
    border: 1px solid var(--gray-300);
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.checkbox-field:hover {
    border-color: var(--primary-muted);
    background: var(--gray-200);
}

.checkbox-field input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--primary);
    cursor: pointer;
}

.checkbox-label {
    font-weight: 600;
    color: var(--text-dark);
    flex: 1;
}

.checkbox-field .help-text {
    width: 100%;
    margin-top: 4px;
    margin-left: 30px;
}

button {
    background: var(--primary);
    color: white;
    font-weight: 600;
    font-size: 16px;
    padding: 16px 28px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

button:hover {
    background: var(--primary-light);
    box-shadow: 0 20px 40px rgba(103, 81, 217, 0.35);
    transform: translateY(-2px);
}

/* Secondary buttons (Load/Save JSON) */
.secondary-buttons {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.btn-secondary {
    flex: 1;
    background: var(--gray-200);
    color: var(--text);
    font-weight: 500;
    font-size: 14px;
    padding: 12px 20px;
    border-radius: 12px;
    border: 1px solid var(--gray-300);
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn-secondary:hover {
    background: var(--gray-300);
    border-color: var(--text);
    transform: translateY(-1px);
    box-shadow: none;
}

.help-text {
    display: block;
    margin-top: 6px;
    font-size: 0.875rem;
    color: var(--text);
}

.error {
    display: block;
    margin-top: 6px;
    color: #dc2626;
    font-weight: 600;
    font-size: 0.875rem;
}

.messages {
    margin-bottom: 20px;
}

.message {
    padding: 14px 18px;
    border-radius: 12px;
    margin-bottom: 8px;
    color: var(--text-dark);
    background: rgba(255, 255, 255, 0.95);
    border-left: 4px solid var(--primary);
}

.note {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 28px 32px;
    border-radius: 20px;
    color: #ffffff;
}

.note h2 {
    margin: 0 0 16px;
    font-size: 1.25rem;
}

.note ol {
    margin: 0 0 16px;
    padding-left: 20px;
}

.note li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.note p {
    margin: 0;
    opacity: 0.9;
}

.note code {
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 0.9em;
}