.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.25rem;
    background: var(--surface-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.header__brand {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--text);
}

.header__meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.header__xp {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--accent-warm);
    letter-spacing: 0.04em;
}

.header__avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1.5px solid var(--border-active);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: border-color 0.2s var(--ease);
}

.header__avatar:hover { border-color: var(--accent); }

.header__avatar-initial {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.header__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Views */
.views {
    padding: 1rem 1rem 5rem;
    max-width: 540px;
    margin: 0 auto;
}

.view {
    display: none;
    animation: viewFadeIn 0.3s var(--ease-out);
}

.view.active { display: block; }

@keyframes viewFadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Bottom Nav */
.nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 1rem;
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
    background: var(--surface-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-top: 1px solid var(--border);
}

.nav__tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s var(--ease);
    opacity: 0.5;
}

.nav__tab.active {
    opacity: 1;
    color: var(--accent);
}

.nav__tab:hover { opacity: 0.8; }

.nav__icon {
    width: 20px;
    height: 20px;
}

.nav__label {
    font-size: 0.55rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}