* {
    box-sizing: border-box;
}

:root {
    --bg: #f6f4ef;
    --card: #ffffff;
    --ink: #0f172a;
    --muted: #51607a;
    --line: rgba(148, 163, 184, 0.24);
    --accent: linear-gradient(135deg, #0ea5e9, #22c55e);
    --shadow: 0 24px 60px rgba(15, 23, 42, 0.16);
    --font-title: 'Space Grotesk', sans-serif;
    --font-body: 'Sora', system-ui, sans-serif;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--ink);
    background: radial-gradient(circle at top left, rgba(14, 165, 233, 0.12), transparent 42%),
        radial-gradient(circle at 80% 0%, rgba(34, 197, 94, 0.12), transparent 45%),
        var(--bg);
}

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 30px 16px;
}

.auth-shell {
    width: min(960px, 100%);
    display: grid;
    gap: 18px;
}

.auth-shell-wide {
    width: min(1040px, 100%);
}

.auth-brand {
    display: grid;
    gap: 6px;
    text-align: center;
}

.brand-link {
    font-family: var(--font-title);
    font-size: 28px;
    color: var(--ink);
    text-decoration: none;
    font-weight: 700;
}

.auth-brand p {
    margin: 0;
    color: var(--muted);
}

.auth-card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: var(--shadow);
    padding: 26px;
    display: grid;
    gap: 16px;
}

h1 {
    margin: 0;
    font-family: var(--font-title);
    font-size: clamp(30px, 3.8vw, 40px);
    letter-spacing: -0.02em;
}

.auth-sub {
    margin: 0;
    color: var(--muted);
}

.auth-form {
    display: grid;
    gap: 12px;
}

.auth-form.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 14px;
}

.auth-form label {
    display: grid;
    gap: 6px;
    font-size: 13px;
    color: var(--muted);
}

.auth-form label span {
    color: var(--ink);
    font-weight: 500;
}

input {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 12px;
    height: 42px;
    padding: 0 12px;
    font-size: 14px;
    color: var(--ink);
    background: #fff;
    font-family: var(--font-body);
}

input:focus {
    outline: none;
    border-color: rgba(14, 165, 233, 0.5);
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.12);
}

.check {
    display: flex !important;
    align-items: center;
    gap: 8px;
}

.check input {
    width: 16px;
    height: 16px;
}

.full {
    grid-column: 1 / -1;
}

.btn-primary,
.btn-ghost {
    border: 1px solid var(--line);
    height: 42px;
    border-radius: 999px;
    font-weight: 600;
    padding: 0 16px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-body);
    cursor: pointer;
}

.btn-primary {
    border: none;
    color: #fff;
    background: var(--accent);
    box-shadow: 0 16px 30px rgba(14, 165, 233, 0.25);
}

.btn-ghost {
    color: var(--ink);
    background: #fff;
}

.auth-links {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    color: var(--muted);
    font-size: 13px;
}

.auth-links a {
    color: inherit;
    text-decoration: none;
}

.notice,
.error {
    border-radius: 12px;
    padding: 10px 12px;
    font-size: 13px;
}

.notice {
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.28);
    color: #166534;
}

.error {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.28);
    color: #991b1b;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

@media (max-width: 760px) {
    .auth-card {
        padding: 20px;
    }

    .auth-form.grid-2 {
        grid-template-columns: 1fr;
    }
}