/* Landing / auth pages + first-login storyline briefing. */

/* === Landing / auth ================================================== */
.landing-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-4);
    position: relative;
    z-index: 1;
}

.landing-focus-card {
    width: 100%;
    max-width: 560px;
    padding: clamp(1.5rem, 3vw, 2.5rem);
    border-radius: calc(var(--radius-panel) + 0.25rem);
    background: rgba(0, 0, 0, 0.5);
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.55);
}

.landing-hero {
    text-align: center;
    margin-bottom: var(--space-4);
}

.landing-hero h1 {
    font-size: 3rem;
    letter-spacing: 0.02em;
    color: var(--color-text-primary);
}

.landing-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.0625rem;
    margin-top: var(--space-1);
}

.landing-auth {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border-subtle);
    margin-bottom: var(--space-3);
}

.auth-tab {
    flex: 1;
    padding: var(--space-1) var(--space-2);
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.875rem;
    transition: color var(--transition-fast), border-color var(--transition-fast);
    border-bottom: 2px solid transparent;
}

.auth-tab.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

/* First-login storyline briefing */
.intro-shell {
    max-width: 920px;
}

.intro-briefing {
    padding: var(--space-4);
}

.intro-kicker {
    color: var(--color-highlight);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-1);
    text-transform: uppercase;
}

.intro-briefing h1 {
    margin-bottom: var(--space-3);
}

.intro-scroll {
    display: grid;
    gap: var(--space-3);
    max-height: min(62vh, 680px);
    overflow-y: auto;
    padding-right: var(--space-2);
}

.intro-scroll section {
    display: grid;
    gap: var(--space-1);
}

.intro-scroll h2 {
    color: var(--color-accent-soft);
}

.intro-scroll p {
    font-size: 1rem;
    line-height: 1.7;
}

.intro-actions {
    align-items: center;
    border-top: 1px solid var(--color-border-subtle);
    display: flex;
    gap: var(--space-2);
    justify-content: flex-end;
    margin-top: var(--space-4);
    padding-top: var(--space-3);
}

.intro-actions form {
    margin: 0;
}