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

:root {
    --bg: #ffffff;
    --fg: #0f172a;
    --muted: #64748b;
    --muted-bg: #f8fafc;
    --border: #e2e8f0;
    --primary: #0f172a;
    --primary-fg: #ffffff;
    --radius: 10px;
    --shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(15, 23, 42, .06);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html,
body {
    margin: 0;
    padding: 0
}

body {
    font-family: var(--font), sans-serif;
    color: var(--fg);
    background: var(--bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased
}

a {
    color: inherit;
    text-decoration: none
}

.container {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 24px
}

.nav {
    border-bottom: 1px solid var(--border);
    background: var(--bg)
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    max-width: 1024px;
    margin: 0 auto
}

.brand {
    font-weight: 600
}

.nav nav {
    display: flex;
    gap: 8px
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: var(--radius);
    background: var(--primary);
    color: var(--primary-fg);
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--primary);
    cursor: pointer;
    transition: opacity .15s
}

.btn:hover {
    opacity: .9
}

.btn-ghost {
    background: transparent;
    color: var(--fg);
    border-color: transparent
}

.btn-ghost:hover {
    background: var(--muted-bg)
}

.btn-outline {
    background: transparent;
    color: var(--fg);
    border-color: var(--border)
}

.btn-outline:hover {
    background: var(--muted-bg)
}

.btn-lg {
    padding: 12px 24px;
    font-size: 15px
}

.btn-block {
    width: 100%;
    padding: 10px
}

.hero {
    text-align: center;
    padding: 96px 24px
}

.hero h1 {
    font-size: 48px;
    line-height: 1.1;
    margin: 0 0 16px;
    letter-spacing: -.02em
}

.hero p {
    font-size: 18px;
    color: var(--muted);
    margin: 0 0 32px
}

.cta {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap
}

.features {
    background: var(--muted-bg);
    border-top: 1px solid var(--border);
    padding: 80px 0
}

.grid {
    display: grid;
    gap: 32px;
    grid-template-columns: repeat(3, 1fr)
}

.grid.two {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 32px
}

.grid h3 {
    margin: 0 0 8px;
    font-size: 16px
}

.grid p {
    margin: 0;
    color: var(--muted);
    font-size: 14px
}

.footer {
    border-top: 1px solid var(--border);
    padding: 24px 0;
    color: var(--muted);
    font-size: 14px
}

.center {
    display: flex;
    min-height: 100vh;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background: var(--muted-bg)
}

.card-wrap {
    width: 100%;
    max-width: 380px
}

.back {
    font-size: 14px;
    color: var(--muted)
}

.back:hover {
    color: var(--fg)
}

.card {
    margin-top: 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow)
}

.card h1 {
    margin: 0 0 4px;
    font-size: 22px
}

.card form {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px
}

.card label {
    font-size: 13px;
    font-weight: 500
}

.card input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font: inherit;
    background: var(--bg)
}

.card input:focus {
    outline: 2px solid var(--fg);
    outline-offset: 1px
}

.muted {
    color: var(--muted);
    font-size: 14px
}

.muted.small {
    font-size: 13px
}

.center-text {
    text-align: center;
    margin-top: 16px
}

.admin {
    padding: 48px 24px
}

.admin h1 {
    font-size: 30px;
    margin: 0 0 8px
}

.strong {
    font-weight: 500;
    margin-top: 4px
}

.admin .card {
    padding: 24px
}

.note {
    margin-top: 32px;
    padding: 24px;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--muted);
    font-size: 14px
}

@media(max-width:720px) {
    .hero h1 {
        font-size: 34px
    }

    .grid,
    .grid.two {
        grid-template-columns: 1fr
    }
}