/* ===== Only Mouth — App Shell (topbar, bottomnav, content area, more menu) ===== */

/* ===== Main Screen ===== */
#main-screen {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    background: var(--bg-primary);
}

/* ===== Top Bar ===== */
.om-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    padding-top: var(--safe-top);
    height: calc(var(--topbar-height) + var(--safe-top));
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
    z-index: 100;
}

.om-topbar-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.om-topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.om-topbar-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--transition-fast);
}

.om-topbar-btn:hover {
    border-color: var(--accent-border);
    color: var(--accent);
    background: var(--accent-dim);
}

/* ===== Content Area ===== */
.om-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

/* ===== Bottom Nav ===== */
.om-bottomnav {
    display: flex;
    align-items: flex-start;
    justify-content: space-around;
    padding: 0.5rem 0;
    padding-bottom: calc(0.5rem + var(--safe-bottom));
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    flex-shrink: 0;
    z-index: 100;
}

.om-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.75rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-family: var(--font);
    font-size: 0.6875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    min-width: 56px;
    flex: 1;
}

.om-nav-item i {
    font-size: 1.125rem;
    transition: var(--transition-fast);
}

.om-nav-item.active {
    color: var(--accent);
}

.om-nav-item:hover {
    color: var(--text-secondary);
}

.om-nav-item.active:hover {
    color: var(--accent);
}

/* Camera snap button — larger, teal circle */
.om-nav-snap {
    color: #fff;
    position: relative;
    top: -14px;
    flex: 0 0 56px;
    min-width: 56px;
    max-width: 56px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #0d9488);
    box-shadow: 0 4px 16px var(--accent-glow), 0 0 0 4px var(--bg-secondary);
    padding: 0;
    justify-content: center;
    align-items: center;
    transition: transform 0.15s, box-shadow 0.15s;
}

.om-nav-snap i {
    font-size: 1.25rem;
    color: #fff;
}

.om-nav-snap:hover {
    transform: scale(1.08);
    color: #fff;
    box-shadow: 0 6px 22px var(--accent-glow), 0 0 0 4px var(--bg-secondary);
}

.om-nav-snap:active {
    transform: scale(0.94);
}

/* ===== More Menu ===== */
.om-more-menu {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: none;
    pointer-events: none;
}
.om-more-menu.visible {
    display: block;
    pointer-events: auto;
}

.om-more-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.55);
    backdrop-filter: blur(3px);
    animation: om-fade-in 0.2s ease;
}

@keyframes om-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.om-more-sheet {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 1rem;
    padding-bottom: calc(1rem + var(--safe-bottom));
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    animation: om-slide-up 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes om-slide-up {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.om-more-sheet button {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.125rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-align: left;
}

.om-more-sheet button i {
    width: 20px;
    color: var(--accent);
    font-size: 1rem;
    flex-shrink: 0;
}

.om-more-sheet button:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-border);
}

.om-more-sheet button:active {
    transform: scale(0.97);
}

/* ===== Tab Content Padding ===== */
.om-tab-content {
    padding: 1rem;
    padding-bottom: 1.5rem;
}

/* ===== Date Nav (used in Diet + Today) ===== */
.om-date-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.om-date-nav-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition-fast);
}

.om-date-nav-btn:hover {
    border-color: var(--accent-border);
    color: var(--accent);
}

.om-date-nav-label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
}

.om-date-nav-label:hover {
    color: var(--accent);
}