/* ===== LAYOUT ===== */
.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.55rem 2rem;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    position: sticky;
    top: 0;
    z-index: 10;
    box-shadow: 0 1px 16px var(--shadow);
    transition: background 0.22s, border-color 0.22s, box-shadow 0.22s;
}

.brand-float {
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    flex-shrink: 0;
}

.brand-logo {
    height: 48px;
    width: 48px;
    object-fit: contain;
    display: block;
    border-radius: 0;
}

.brand-title {
    margin-left: 0.75rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--nav-color);
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.brand-game-logo {
    border-radius: 0.5rem;
}

.main-nav {
    display: flex;
    gap: 0.15rem;
    align-items: center;
}

.main-nav a,
.main-nav button {
    color: var(--nav-color);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    transition: background 0.18s, color 0.18s;
    background: none;
    border: none;
    font-family: inherit;
}

.main-nav a:hover,
.main-nav button:hover {
    background: var(--accent-muted);
    color: var(--nav-active);
}

.main-nav a.active {
    background: var(--accent-muted);
    color: var(--nav-active);
    font-weight: 700;
}

.nav-user-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.85rem;
    border-radius: 999px;
    background: var(--accent-muted);
    border: 1px solid var(--border);
    color: var(--nav-active);
    font-weight: 600;
    font-size: 0.85rem;
    margin-right: 0.25rem;
}

.nav-logout {
    background: none;
    border: none;
    color: var(--nav-color);
    font-weight: 600;
    font-size: 0.9rem;
    font-family: inherit;
    cursor: pointer;
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    transition: background 0.18s, color 0.18s;
}

.nav-logout:hover {
    background: rgba(255, 80, 80, 0.08);
    color: #ff6b6b;
}

.theme-float {
    position: fixed;
    top: 5rem;
    right: 1.5rem;
    z-index: 9;
    width: 42px;
    height: 42px;
    padding: 0;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--nav-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 16px var(--shadow), 0 1px 4px rgba(0,0,0,0.08);
    transition: background 0.15s, color 0.15s, box-shadow 0.15s, transform 0.12s;
    font-family: inherit;
    line-height: 1;
}

.theme-float:hover {
    background: var(--accent-muted);
    color: var(--nav-active);
    box-shadow: 0 6px 22px var(--shadow);
    transform: translateY(-2px) scale(1.06);
}

.theme-float:active {
    transform: scale(0.95);
    box-shadow: 0 2px 8px var(--shadow);
}

.app-content {
    flex: 1;
    padding: 2.5rem 1.5rem;
}

.app-content.auth-page-container {
    background: none;
    padding: 0;
}

.app-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    padding: 0.85rem 2rem;
    text-align: center;
    color: var(--footer-color);
    border-top: 2px solid var(--border);
    font-family: 'VT323', monospace;
    font-size: 1rem;
    letter-spacing: 0.05em;
    transition: color 0.22s, border-color 0.22s;
}

.footer-gh {
    display: inline-flex;
    align-items: center;
    color: var(--nav-color);
    font-family: 'VT323', monospace;
    transition: color 0.15s;
}

.footer-gh:hover { color: var(--nav-active); }

/* ===== NAV CONTROLS (theme toggle + hamburger) ===== */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 0.15rem;
}

.nav-hamburger {
    display: none;
    background: none;
    border: 1px solid var(--border);
    color: var(--nav-color);
    padding: 0.3rem 0.4rem;
    border-radius: 7px;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
    font-family: inherit;
    line-height: 1;
}

.nav-hamburger:hover { background: var(--accent-muted); color: var(--accent); }

/* ===== RESPONSIVE ===== */

/* Tablet + Mobile nav collapse */
@media (max-width: 768px) {
    .nav-hamburger { display: flex; }

    .app-header {
        flex-wrap: wrap;
        padding: 0.5rem 1rem;
        gap: 0;
    }

    .theme-float { top: 4.8rem; right: 1rem; width: 38px; height: 38px; }

    .main-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0.1rem;
        padding: 0.6rem 0 0.5rem;
        border-top: 1px solid var(--border);
        margin-top: 0.4rem;
        order: 3;
    }

    .app-header.nav-open .main-nav { display: flex; }

    .main-nav a,
    .main-nav .nav-logout {
        border-radius: 8px;
        text-align: left;
        justify-content: flex-start;
        padding: 0.6rem 0.85rem;
        width: 100%;
    }

    .nav-user-chip {
        border-radius: 8px;
        margin: 0.1rem 0;
        justify-content: flex-start;
    }

    .app-content { padding: 1.25rem 0.9rem; }

    .dashboard-card { gap: 0.75rem; }

    .learning-grid { grid-template-columns: 1fr; }

    .learning-summary { grid-template-columns: repeat(3, 1fr); }

    .panel-card { border-radius: 14px; }

    .log-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

    .lernen-seite { padding: 1rem 0.5rem; align-items: stretch; }

    .lern-fenster { max-width: 100%; }

    .card-edit-panel { padding: 0.85rem 0.9rem 1rem; }
}

/* Small mobile */
@media (max-width: 480px) {
    .learning-summary { grid-template-columns: 1fr; }

    .lern-aktionen { flex-direction: column; }
    .lern-aktionen .btn-primary,
    .lern-aktionen .btn-secondary { width: 100%; }

    .card-row-thumb { width: 56px; height: 56px; }

    .log-table th,
    .log-table td { font-size: 0.78rem; padding: 0.45rem 0.6rem; }

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

    .lern-titelbar-titel { font-size: 0.38rem; }

    .summary-value { font-size: 1.5rem; }
}

@media (max-width: 600px) {
    .app-header { padding: 0.55rem 1.25rem; }
    .theme-float { top: 4.6rem; right: 0.75rem; width: 36px; height: 36px; }
}