:root {
    --color-text: #111827;
    --color-muted: #6b7280;
    --color-accent: #2563eb;
    --color-bg: #ffffff;
    --color-border: #e5e7eb;
    --color-danger: #b91c1c;
    --color-success-bg: #ecfdf5;
    --color-success-border: #34d399;
    --color-success-text: #065f46;
    --max-width: 64rem;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.55;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

a {
    color: var(--color-accent);
}

h1 {
    font-size: 2rem;
    margin: 0 0 1rem;
}

h2 {
    margin-top: 2rem;
}

.lead {
    font-size: 1.15rem;
    color: var(--color-muted);
}

.hero {
    padding: 2rem 0;
}

.cta {
    display: inline-block;
    background: var(--color-accent);
    color: #fff;
    text-decoration: none;
    padding: 0.6rem 1.1rem;
    border-radius: 0.4rem;
    border: 0;
    cursor: pointer;
    font: inherit;
}

.cta:hover {
    filter: brightness(1.05);
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-bottom: 1rem;
    max-width: 32rem;
}

.form-row label {
    font-weight: 500;
}

.form-row input,
.form-row textarea {
    font: inherit;
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--color-border);
    border-radius: 0.35rem;
    background: #fff;
}

.form-row input:focus,
.form-row textarea:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 1px;
}

.validation-message {
    color: var(--color-danger);
    font-size: 0.9rem;
}

.validation-errors {
    color: var(--color-danger);
    margin-bottom: 1rem;
}

.alert-success {
    background: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    color: var(--color-success-text);
    padding: 0.85rem 1rem;
    border-radius: 0.4rem;
}