:root {
    color-scheme: dark;
    --bg: #07111f;
    --bg-soft: #0b1828;
    --card: rgba(14, 30, 48, 0.88);
    --card-border: rgba(153, 190, 208, 0.18);
    --text: #f3f7f9;
    --muted: #9fb2bd;
    --accent: #61e6c5;
    --accent-strong: #32cba8;
    --accent-ink: #04241c;
    --error: #ff9b9b;
    --success: #7ff0ce;
    --focus: #a9f7e4;
    --shadow: 0 32px 80px rgba(0, 0, 0, 0.36);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    min-width: 320px;
    background: var(--bg);
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--text);
    background:
        radial-gradient(circle at 12% 18%, rgba(43, 184, 159, 0.16), transparent 32rem),
        radial-gradient(circle at 88% 4%, rgba(71, 117, 183, 0.18), transparent 30rem),
        linear-gradient(145deg, #07111f 0%, #091523 55%, #06101c 100%);
}

body::before {
    position: fixed;
    inset: 0;
    z-index: -1;
    content: "";
    opacity: 0.16;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(to bottom, black, transparent 82%);
}

.page-shell {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(30rem, 1.1fr);
    gap: clamp(2.5rem, 6vw, 7rem);
    align-items: center;
    width: min(1180px, calc(100% - 3rem));
    min-height: calc(100vh - 5rem);
    margin: 0 auto;
    padding: clamp(3rem, 7vw, 6rem) 0 2rem;
}

.intro {
    display: flex;
    flex-direction: column;
    gap: 2.25rem;
}

.eyebrow,
.step-label {
    margin: 0 0 1.1rem;
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 750;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.status-dot {
    display: inline-block;
    width: 0.5rem;
    height: 0.5rem;
    margin-right: 0.55rem;
    border-radius: 999px;
    background: var(--accent);
    box-shadow: 0 0 0 0.3rem rgba(97, 230, 197, 0.1), 0 0 1rem rgba(97, 230, 197, 0.55);
}

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

h1 {
    max-width: 11ch;
    margin-bottom: 1.4rem;
    font-size: clamp(3.2rem, 6vw, 5.7rem);
    font-weight: 760;
    letter-spacing: -0.065em;
    line-height: 0.96;
}

h1 span {
    color: var(--accent);
}

.lede {
    max-width: 37rem;
    margin-bottom: 0;
    color: var(--muted);
    font-size: clamp(1rem, 1.5vw, 1.12rem);
    line-height: 1.75;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
    margin: 0;
}

.feature-grid div {
    padding: 1rem 1.1rem;
    border: 1px solid rgba(153, 190, 208, 0.12);
    border-radius: 0.85rem;
    background: rgba(255, 255, 255, 0.025);
}

.feature-grid dt {
    margin-bottom: 0.32rem;
    color: #7c939f;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.feature-grid dd {
    margin: 0;
    font-size: 0.92rem;
    font-weight: 650;
}

.evidence-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.35rem;
}

.evidence-links a {
    color: var(--text);
    font-size: 0.86rem;
    font-weight: 650;
    text-underline-offset: 0.28rem;
    text-decoration-color: rgba(97, 230, 197, 0.6);
}

.evidence-links a:hover {
    color: var(--accent);
}

.form-card {
    padding: clamp(1.5rem, 4vw, 2.5rem);
    border: 1px solid var(--card-border);
    border-radius: 1.5rem;
    background: var(--card);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.card-heading {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.15rem;
}

.card-heading .step-label {
    margin-bottom: 0.55rem;
}

h2 {
    margin-bottom: 0;
    font-size: clamp(1.35rem, 2.4vw, 1.85rem);
    letter-spacing: -0.035em;
}

.sample-button {
    flex: none;
    padding: 0.62rem 0.78rem;
    border: 1px solid rgba(97, 230, 197, 0.32);
    border-radius: 0.65rem;
    color: var(--accent);
    background: rgba(97, 230, 197, 0.07);
    font: inherit;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
}

.sample-button:hover {
    background: rgba(97, 230, 197, 0.13);
}

.privacy-note {
    margin-bottom: 1.55rem;
    padding: 0.8rem 0.9rem;
    border-left: 2px solid rgba(97, 230, 197, 0.55);
    color: #aebfc8;
    background: rgba(97, 230, 197, 0.045);
    font-size: 0.76rem;
    line-height: 1.55;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.field {
    margin-bottom: 1.05rem;
}

label,
.label-line {
    font-size: 0.78rem;
    font-weight: 700;
}

label {
    display: inline-block;
    margin-bottom: 0.48rem;
}

label > span:not(.optional) {
    color: var(--accent);
}

.optional {
    margin-left: 0.25rem;
    color: #728a96;
    font-size: 0.66rem;
    font-weight: 650;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.label-line {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.48rem;
}

.label-line label {
    margin: 0;
}

#message-count {
    color: #718893;
    font-size: 0.68rem;
    font-weight: 600;
}

input,
textarea {
    display: block;
    width: 100%;
    border: 1px solid rgba(153, 190, 208, 0.18);
    border-radius: 0.7rem;
    outline: none;
    color: var(--text);
    background: rgba(3, 12, 22, 0.52);
    font: inherit;
    font-size: 0.9rem;
    transition: border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

input {
    height: 2.85rem;
    padding: 0 0.85rem;
}

textarea {
    min-height: 7.5rem;
    padding: 0.8rem 0.85rem;
    line-height: 1.5;
    resize: vertical;
}

input::placeholder,
textarea::placeholder {
    color: #78909c;
}

input:focus,
textarea:focus {
    border-color: rgba(97, 230, 197, 0.72);
    background: rgba(3, 12, 22, 0.75);
    box-shadow: 0 0 0 0.2rem rgba(97, 230, 197, 0.09);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
    border-color: rgba(255, 155, 155, 0.8);
}

.field-hint,
.field-error {
    min-height: 1rem;
    margin: 0.35rem 0 0;
    font-size: 0.68rem;
    line-height: 1.4;
}

.field-hint {
    color: #718893;
}

.field-error {
    color: var(--error);
}

.field-hint + .field-error:empty {
    display: none;
}

.form-footer {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.45rem;
}

.submit-button {
    display: inline-flex;
    gap: 1.6rem;
    align-items: center;
    justify-content: space-between;
    min-width: 14rem;
    min-height: 3rem;
    padding: 0.75rem 0.9rem 0.75rem 1.05rem;
    border: 0;
    border-radius: 0.72rem;
    color: var(--accent-ink);
    background: var(--accent);
    font: inherit;
    font-size: 0.82rem;
    font-weight: 800;
    cursor: pointer;
    transition: transform 140ms ease, background 140ms ease, opacity 140ms ease;
}

.submit-button:hover:not(:disabled) {
    transform: translateY(-1px);
    background: #79efd2;
}

.submit-button:disabled {
    cursor: wait;
    opacity: 0.65;
}

.button-arrow {
    display: grid;
    width: 1.55rem;
    height: 1.55rem;
    place-items: center;
    border-radius: 999px;
    background: rgba(4, 36, 28, 0.12);
}

.endpoint-label {
    margin: 0;
    color: #718893;
    font-size: 0.7rem;
}

code {
    font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

.form-status {
    margin-top: 1rem;
    padding: 0.85rem 0.95rem;
    border: 1px solid rgba(127, 240, 206, 0.25);
    border-radius: 0.7rem;
    color: var(--success);
    background: rgba(127, 240, 206, 0.07);
    font-size: 0.78rem;
    line-height: 1.5;
}

.form-status.is-error {
    border-color: rgba(255, 155, 155, 0.28);
    color: var(--error);
    background: rgba(255, 155, 155, 0.06);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
}

footer {
    width: min(1180px, calc(100% - 3rem));
    margin: 0 auto;
    padding: 0 0 1.5rem;
    color: #7f96a2;
    font-size: 0.68rem;
    letter-spacing: 0.04em;
    text-align: center;
}

footer p {
    margin: 0;
}

@media (max-width: 900px) {
    .page-shell {
        grid-template-columns: 1fr;
        width: min(680px, calc(100% - 2rem));
        padding-top: 3rem;
    }

    h1 {
        max-width: 12ch;
    }

    footer {
        width: calc(100% - 2rem);
        padding-top: 1.5rem;
    }
}

@media (max-width: 560px) {
    .page-shell {
        gap: 2.2rem;
        width: min(100% - 1rem, 36rem);
        padding-top: 2rem;
    }

    .intro {
        gap: 1.5rem;
        padding: 0 0.5rem;
    }

    h1 {
        font-size: clamp(2.8rem, 14vw, 4rem);
    }

    .feature-grid {
        gap: 0.55rem;
    }

    .feature-grid div {
        padding: 0.85rem;
    }

    .form-card {
        padding: 1.2rem;
        border-radius: 1.1rem;
    }

    .card-heading {
        align-items: stretch;
        flex-direction: column;
    }

    .sample-button {
        align-self: flex-start;
    }

    .field-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-footer {
        align-items: stretch;
        flex-direction: column;
    }

    .submit-button {
        width: 100%;
    }

    .endpoint-label {
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}