:root {
    color-scheme: light;
    --ink: #172033;
    --muted: #667085;
    --line: #e3e8ef;
    --surface: #ffffff;
    --canvas: #f5f7fb;
    --brand: #1d4ed8;
    --brand-dark: #173b8f;
    --success-bg: #e8f7ef;
    --success-ink: #136c42;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    color: var(--ink);
    background:
        radial-gradient(circle at top right, rgba(29, 78, 216, 0.08), transparent 30rem),
        var(--canvas);
}

a { color: inherit; }

.app-header {
    min-height: 64px;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
}

.brand {
    color: var(--brand-dark);
    font-weight: 750;
    text-decoration: none;
    letter-spacing: -0.02em;
}

.header-meta {
    display: flex;
    align-items: center;
    gap: 18px;
    color: var(--muted);
    font-size: 0.9rem;
}

.page-shell {
    width: min(1100px, calc(100% - 32px));
    margin: 48px auto;
}

.hero-card,
.content-card,
.auth-card {
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--surface);
    box-shadow: 0 16px 44px rgba(29, 43, 74, 0.07);
}

.hero-card {
    padding: clamp(28px, 5vw, 64px);
    background: linear-gradient(135deg, #fff 35%, #edf3ff);
}

.hero-card h1,
.auth-card h1 {
    max-width: 760px;
    margin: 8px 0 12px;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.02;
    letter-spacing: -0.05em;
}

.hero-card p:not(.eyebrow),
.auth-card p:not(.eyebrow) {
    color: var(--muted);
}

.eyebrow {
    margin: 0;
    color: var(--brand);
    font-size: 0.75rem;
    font-weight: 750;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.content-card { margin-top: 22px; padding: 28px; }

.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.section-heading h2 { margin: 6px 0 0; }

.status-pill {
    padding: 7px 10px;
    border-radius: 999px;
    color: var(--success-ink);
    background: var(--success-bg);
    font-size: 0.75rem;
    font-weight: 700;
}

.membership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
    margin-top: 24px;
}

.membership-card {
    display: grid;
    gap: 5px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
}

.membership-card span,
.membership-card small,
.empty-state { color: var(--muted); }

.auth-card {
    width: min(440px, 100%);
    margin: 10vh auto 0;
    padding: 34px;
}

.auth-card h1 { font-size: 2.4rem; }

.auth-form { display: grid; gap: 10px; margin-top: 24px; }

.auth-form label { margin-top: 8px; font-size: 0.85rem; font-weight: 700; }

.auth-form input {
    width: 100%;
    padding: 12px 13px;
    border: 1px solid #cfd7e3;
    border-radius: 10px;
    font: inherit;
}

.auth-form input:focus {
    border-color: var(--brand);
    outline: 3px solid rgba(29, 78, 216, 0.12);
}

.primary-button {
    margin-top: 14px;
    padding: 12px 16px;
    border: 0;
    border-radius: 10px;
    color: white;
    background: var(--brand);
    font: inherit;
    font-weight: 750;
    cursor: pointer;
}

.primary-button:hover { background: var(--brand-dark); }

.link-button {
    border: 0;
    padding: 0;
    color: var(--brand);
    background: transparent;
    font: inherit;
    cursor: pointer;
}

.error-box {
    margin-top: 18px;
    padding: 12px;
    border-radius: 10px;
    color: #9d2525;
    background: #fff0f0;
}

@media (max-width: 680px) {
    .app-header { padding: 0 16px; }
    .header-meta span { display: none; }
    .page-shell { margin-top: 22px; }
    .section-heading { align-items: flex-start; flex-direction: column; }
}