/* Accessible Form Validation */
:root {
    color-scheme: light;
    --page: #f4f6f1;
    --surface: #ffffff;
    --surface-soft: #eaf1e9;
    --ink: #19352a;
    --ink-soft: #4a6156;
    --line: #c9d5ca;
    --green: #216a48;
    --green-deep: #164d34;
    --green-light: #dcefe2;
    --red: #a22d2c;
    --red-deep: #842322;
    --red-light: #fff0ed;
    --focus: #8b3e07;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-synthesis: none;
    -webkit-font-smoothing: antialiased;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 0;
    margin: 0;
    background: var(--page);
    color: var(--ink);
    line-height: 1.55;
}

[hidden] {
    display: none !important;
}

button,
input,
select,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

a {
    color: var(--green-deep);
    text-underline-offset: 0.19em;
}

a:hover {
    color: var(--green);
}

:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.container {
    width: min(100% - 3rem, 1120px);
    margin-inline: auto;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: fixed;
    z-index: 20;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.7rem 1rem;
    transform: translateY(-160%);
    border-radius: 0.5rem;
    background: var(--ink);
    color: white;
    font-weight: 700;
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: var(--surface);
}

.header-inner,
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.header-inner {
    min-height: 4.5rem;
}

.site-name {
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: -0.015em;
}

.site-header a {
    font-size: 0.9rem;
    font-weight: 700;
}

.site-header a span,
.primary-button span {
    display: inline-block;
    margin-left: 0.2rem;
}

main {
    padding-block: clamp(2.5rem, 6vw, 5.5rem) clamp(4rem, 8vw, 7rem);
}

.intro {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(200px, 270px);
    align-items: end;
    gap: 2rem 4rem;
    margin-bottom: clamp(2rem, 4vw, 3.25rem);
}

.eyebrow {
    margin: 0 0 0.7rem;
    color: var(--green);
    font-size: 0.76rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    line-height: 1.4;
    text-transform: uppercase;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1,
h2,
h3 {
    line-height: 1.16;
    letter-spacing: -0.035em;
}

h1 {
    max-width: 12ch;
    margin-bottom: 1.25rem;
    font-size: clamp(2.65rem, 5.7vw, 5.2rem);
    font-weight: 800;
}

.lead {
    max-width: 62ch;
    margin-bottom: 0;
    color: var(--ink-soft);
    font-size: clamp(1.05rem, 1.5vw, 1.22rem);
}

.demo-note {
    margin: 0 0 0.25rem;
    padding: 1.05rem 1.15rem;
    border-left: 3px solid var(--green);
    background: var(--surface-soft);
    color: var(--ink-soft);
    font-size: 0.92rem;
}

.demo-note strong {
    color: var(--ink);
}

.script-note {
    margin: 0 0 1.5rem;
    padding: 1rem 1.2rem;
    border-left: 4px solid var(--green);
    border-radius: 0.35rem;
    background: var(--surface-soft);
    color: var(--ink);
    font-weight: 600;
}

.demo-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(260px, 0.9fr);
    align-items: start;
    gap: clamp(1rem, 3vw, 2rem);
}

.form-panel,
.guide-panel {
    border: 1px solid var(--line);
    border-radius: 1.2rem;
}

.form-panel {
    padding: clamp(1.35rem, 4vw, 3.5rem);
    background: var(--surface);
    box-shadow: 0 22px 55px -44px #19352a99;
}

.form-heading {
    margin-bottom: 2.25rem;
}

.form-heading h2,
.guide-panel h2,
.success-panel h2 {
    margin-bottom: 0.65rem;
    font-size: clamp(1.75rem, 2.5vw, 2.45rem);
}

.form-heading > p:last-child,
.guide-panel > p:not(.eyebrow),
.success-panel > p:not(.eyebrow) {
    margin-bottom: 0;
    color: var(--ink-soft);
}

.field {
    margin-bottom: 1.55rem;
}

.field label {
    display: inline-block;
    margin-bottom: 0.45rem;
    font-size: 0.94rem;
    font-weight: 750;
}

.required {
    color: var(--red);
}

.field input,
.field select,
.field textarea {
    display: block;
    width: 100%;
    min-height: 3.15rem;
    padding: 0.72rem 0.9rem;
    border: 1.5px solid #acbcb0;
    border-radius: 0.55rem;
    background: #fff;
    color: var(--ink);
    line-height: 1.45;
    transition: border-color 150ms ease, box-shadow 150ms ease, background-color 150ms ease;
}

.field textarea {
    min-height: 9.5rem;
    resize: vertical;
}

.field select {
    padding-right: 2.25rem;
}

.field input:hover,
.field select:hover,
.field textarea:hover {
    border-color: var(--green);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    border-color: var(--green);
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

.field input[aria-invalid="true"],
.field select[aria-invalid="true"],
.field textarea[aria-invalid="true"] {
    border-color: var(--red);
    background: #fffafa;
}

.field input[aria-invalid="true"]:focus,
.field select[aria-invalid="true"]:focus,
.field textarea[aria-invalid="true"]:focus {
    border-color: var(--red-deep);
}

.field-help,
.field-error {
    margin: 0.42rem 0 0;
    font-size: 0.82rem;
    line-height: 1.45;
}

.field-help {
    color: var(--ink-soft);
}

.field-help-split {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.25rem 1rem;
}

.field-help-split span:last-child {
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.field-error {
    color: var(--red-deep);
    font-weight: 700;
}

.field-error::before {
    content: "!";
    display: inline-grid;
    width: 1.1rem;
    height: 1.1rem;
    margin-right: 0.35rem;
    place-items: center;
    border-radius: 50%;
    background: var(--red);
    color: #fff;
    font-size: 0.72rem;
    line-height: 1;
}

.error-summary {
    margin: 0 0 2rem;
    padding: 1.25rem 1.4rem;
    border: 1px solid #d88b84;
    border-left: 5px solid var(--red);
    border-radius: 0.55rem;
    background: var(--red-light);
    color: var(--red-deep);
}

.error-summary:focus {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.error-summary h3 {
    margin-bottom: 0.65rem;
    font-size: 1.1rem;
}

.error-summary ul {
    margin: 0;
    padding-left: 1.35rem;
}

.error-summary li + li {
    margin-top: 0.3rem;
}

.error-summary a {
    color: var(--red-deep);
    font-weight: 700;
}

.primary-button,
.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.15rem;
    padding: 0.8rem 1.25rem;
    border: 2px solid var(--green-deep);
    border-radius: 0.55rem;
    font-weight: 750;
    line-height: 1.3;
    transition: background-color 150ms ease, color 150ms ease, transform 150ms ease;
}

.primary-button {
    min-width: 10.75rem;
    background: var(--green-deep);
    color: #fff;
}

.primary-button:hover {
    background: var(--green);
    border-color: var(--green);
    transform: translateY(-1px);
}

.secondary-button {
    background: transparent;
    color: var(--green-deep);
}

.secondary-button:hover {
    background: var(--green-deep);
    color: #fff;
}

.primary-button:active,
.secondary-button:active {
    transform: translateY(0);
}

.submit-note {
    margin: 0.75rem 0 0;
    color: var(--ink-soft);
    font-size: 0.82rem;
}

.success-panel {
    padding-block: clamp(2rem, 5vw, 4rem);
}

.success-panel:focus {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

.success-icon {
    display: grid;
    width: 3.5rem;
    height: 3.5rem;
    margin-bottom: 1.7rem;
    place-items: center;
    border-radius: 50%;
    background: var(--green-light);
    color: var(--green-deep);
    font-size: 1.8rem;
    font-weight: 800;
}

.success-panel > p:not(.eyebrow) {
    max-width: 42ch;
    margin-bottom: 1.8rem;
}

.guide-panel {
    padding: clamp(1.35rem, 3vw, 2.25rem);
    background: var(--surface-soft);
}

.guide-panel h2 {
    font-size: clamp(1.6rem, 2.3vw, 2.1rem);
}

.guide-panel ol {
    display: grid;
    gap: 1.35rem;
    margin: 1.7rem 0 2rem;
    padding-left: 1.45rem;
}

.guide-panel li {
    padding-left: 0.35rem;
    color: var(--ink-soft);
}

.guide-panel li::marker {
    color: var(--green);
    font-weight: 800;
}

.guide-panel li strong {
    display: block;
    color: var(--ink);
}

.guide-detail {
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
}

.guide-detail h3 {
    margin-bottom: 0.55rem;
    font-size: 1.04rem;
}

.guide-detail p {
    margin-bottom: 0;
    color: var(--ink-soft);
    font-size: 0.9rem;
}

.site-footer {
    border-top: 1px solid var(--line);
    color: var(--ink-soft);
    font-size: 0.83rem;
}

.footer-inner {
    min-height: 5rem;
}

@media (max-width: 800px) {
    .intro,
    .demo-grid {
        grid-template-columns: 1fr;
    }

    .intro {
        gap: 1.5rem;
    }

    .demo-note {
        max-width: 42rem;
    }

    .guide-panel {
        order: 2;
    }
}

@media (max-width: 540px) {
    .container {
        width: min(100% - 2rem, 1120px);
    }

    .header-inner {
        min-height: 4rem;
    }

    .site-header a {
        font-size: 0.84rem;
    }

    h1 {
        font-size: clamp(2.45rem, 12vw, 3.4rem);
    }

    .form-panel,
    .guide-panel {
        border-radius: 0.85rem;
    }

    .form-heading {
        margin-bottom: 1.8rem;
    }

    .primary-button {
        width: 100%;
    }

    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
        justify-content: center;
        gap: 0.15rem;
        padding-block: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}