:root {
    --bg: #141414;
    --surface: #1c1c1c;
    --surface-2: #222222;
    --border: rgba(255, 255, 255, .10);
    --text: rgba(255, 255, 255, .92);
    --muted: rgba(255, 255, 255, .62);
    --accent: #FFA302;
    --accent-ink: #1a1200;
    --danger: #ff7b7b;
    --success: #56d68b;
    --radius: 10px;
    --max: 720px;
}

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

html {
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background-color: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
}

img,
svg {
    max-width: 100%;
}

h1,
h2 {
    line-height: 1.2;
    letter-spacing: -.01em;
}

/* ---------- Navigation ---------- */

.site-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(20, 20, 20, .92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.site-nav__inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.site-nav__brand {
    font-size: 18px;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: -.01em;
}

.site-nav__brand span {
    color: var(--accent);
}

.site-nav__links {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.site-nav__link {
    display: inline-block;
    padding: 7px 12px;
    border-radius: 999px;
    font-size: 14px;
    text-decoration: none;
    color: var(--muted);
    transition: color .15s ease, background-color .15s ease;
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
    color: var(--text);
    background: rgba(255, 255, 255, .07);
}

.site-nav__link.active {
    color: var(--text);
    background: rgba(255, 255, 255, .10);
}

/* ---------- Layout ---------- */

.site-main {
    display: block;
    min-height: 60vh;
}

.wrap {
    max-width: var(--max);
    margin: 0 auto;
    padding: 64px 20px 48px;
}

.wrap--center {
    text-align: center;
}

/* ---------- Hero ---------- */

.hero {
    max-width: 640px;
    margin: 0 auto;
    padding: 80px 20px 56px;
    text-align: center;
}

.hero h1 {
    font-size: 34px;
    margin: 0 0 16px;
}

.hero p {
    font-size: 17px;
    color: var(--muted);
    margin: 0 auto 30px;
    max-width: 520px;
}

/* ---------- Typography blocks ---------- */

.page h1 {
    font-size: 28px;
    margin: 0 0 20px;
}

.page p {
    font-size: 16px;
    color: var(--muted);
    margin: 0 0 18px;
}

.placeholder {
    display: inline-block;
    margin: 4px 0 0;
    padding: 4px 10px;
    border: 1px dashed rgba(255, 163, 2, .55);
    border-radius: 8px;
    color: var(--accent);
    font-size: 14px;
    background: rgba(255, 163, 2, .07);
}

/* ---------- Buttons ---------- */

.btn {
    display: inline-block;
    padding: 12px 26px;
    border: 1px solid transparent;
    border-radius: var(--radius);
    background: var(--accent);
    color: var(--accent-ink);
    font: inherit;
    font-weight: 600;
    font-size: 15px;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: transform .12s ease, filter .15s ease;
}

.btn:hover:not(:disabled) {
    filter: brightness(1.06);
}

.btn:active:not(:disabled) {
    transform: translateY(1px);
}

.btn:disabled {
    opacity: .6;
    cursor: not-allowed;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ---------- Form ---------- */

.form {
    margin-top: 28px;
    display: grid;
    gap: 18px;
}

.field {
    display: block;
}

.field > label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 600;
}

.field .optional {
    color: var(--muted);
    font-weight: 400;
}

.field input,
.field textarea {
    display: block;
    width: 100%;
    padding: 11px 13px;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font: inherit;
    font-size: 15px;
}

.field textarea {
    min-height: 140px;
    resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder {
    color: rgba(255, 255, 255, .35);
}

.field input:focus,
.field textarea:focus {
    border-color: rgba(255, 163, 2, .75);
    outline: 2px solid rgba(255, 163, 2, .35);
    outline-offset: 1px;
}

.field input:user-invalid,
.field textarea:user-invalid {
    border-color: rgba(255, 123, 123, .6);
}

.form__actions {
    margin-top: 4px;
}

.form-status {
    margin: 0 0 2px;
    padding: 11px 14px;
    border-radius: var(--radius);
    font-size: 15px;
    border: 1px solid transparent;
}

.form-status[hidden] {
    display: none;
}

.form-status.is-success {
    color: var(--success);
    background: rgba(86, 214, 139, .10);
    border-color: rgba(86, 214, 139, .35);
}

.form-status.is-error {
    color: var(--danger);
    background: rgba(255, 123, 123, .10);
    border-color: rgba(255, 123, 123, .35);
}

/* ---------- Footer ---------- */

.site-footer {
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

.site-footer__inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 20px;
    text-align: center;
    font-size: 14px;
    color: var(--muted);
}

@media (max-width: 520px) {
    .site-nav__inner {
        padding: 12px 16px;
    }

    .site-nav__link {
        padding: 6px 10px;
        font-size: 13px;
    }

    .hero {
        padding: 56px 16px 40px;
    }

    .hero h1 {
        font-size: 27px;
    }

    .wrap {
        padding: 44px 16px 36px;
    }
}