/* M3 Top App Bar (Small) */
.m3-top-app-bar {
    height: 64px;
    width: 100%;
    background: var(--m3-surface);
    color: var(--m3-on-surface);
    display: flex;
    align-items: center;
    padding: 0 16px;
    box-sizing: border-box;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.m3-top-app-bar.scrolled {
    background: var(--m3-surface-container);
    /* Elevation 2 equivalent or similar color shift */
    box-shadow: var(--m3-elevation-1);
}

.m3-top-app-bar .leading-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 4px;
    /* Optically adjustment */
    color: var(--m3-on-surface);
    cursor: pointer;
    border-radius: 50%;
}

.m3-top-app-bar .leading-icon:hover {
    background: rgba(73, 69, 79, 0.08);
    /* On-surface-variant 8% */
    color: var(--m3-on-surface);
}

.m3-top-app-bar .leading-icon:active {
    background: rgba(73, 69, 79, 0.12);
}

.m3-top-app-bar .headline {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Outfit', sans-serif;
    font-size: 22px;
    /* Title Large */
    line-height: 28px;
    font-weight: 400;
    color: var(--m3-on-surface);
    white-space: nowrap;
}

.m3-top-app-bar .trailing-icons {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 2;
    /* Ensure icons are above title */
}

/* Ensure left items are also clickable if overlap occurs */
.m3-top-app-bar .leading-icon,
.m3-top-app-bar>.m3-icon-button {
    z-index: 2;
    position: relative;
}

/* M3 Icon Button (Standard & Filled) */
.m3-icon-button {
    /* Specs: 40dp container, 24dp icon */
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 48px !important;
    height: 48px !important;
    padding: 0 !important;
    margin: 0;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--m3-on-surface-variant);
    cursor: pointer;
    transition: background 0.2s cubic-bezier(0.2, 0, 0, 1), color 0.2s linear;
    text-decoration: none;
    flex-shrink: 0;
    box-sizing: border-box;
    font-size: 0 !important;
    /* Kill whitespace */
    line-height: 0 !important;
}

/* Icon Size Enforcement */
.m3-icon-button .material-symbols-outlined {
    font-size: 24px !important;
    line-height: 24px !important;
    width: 24px !important;
    height: 24px !important;
    display: block !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* State: Hover */
.m3-icon-button:hover {
    background: rgba(73, 69, 79, 0.08);
    /* On-surface-variant 8% */
    color: var(--m3-on-surface);
}

/* State: Active */
.m3-icon-button:active {
    background: rgba(73, 69, 79, 0.12);
    /* On-surface-variant 12% */
}

/* Variant: Filled */
.m3-icon-button.filled {
    background: var(--m3-primary);
    color: var(--m3-on-primary);
}

.m3-icon-button.filled:hover {
    background: var(--m3-primary);
    box-shadow: var(--m3-elevation-1);
    filter: brightness(1.08);
}

.m3-icon-button.filled:active {
    box-shadow: none;
    filter: brightness(0.96);
}

/* User Info Chip inside bar */
.user-chip {
    font-size: 14px;
    color: var(--m3-on-surface-variant);
    margin-right: 8px;
    font-weight: 500;
}