/* ==================== SIDEBAR LAYOUT ==================== */
.sb {
    display: flex;
    flex-direction: row;
    overflow: hidden
}

.sb.left {
    border-right: 1px solid var(--border-primary)
}

.sb.right {
    width: var(--sb-w);
    min-width: var(--sb-w);
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    border-left: 1px solid var(--border-primary)
}

.sb-inner {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px
}

/* ==================== ICON RAIL ==================== */
.icon-rail {
    width: 54px;
    min-width: 54px;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 8px 0;
    border-right: 1px solid var(--border-primary)
}

.logo-i-sm {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: #fff;
    font-weight: 800;
    margin-bottom: 8px;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm)
}

.rail-icon {
    width: 42px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1px;
    padding: 6px 0;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-spring);
    position: relative;
    color: var(--fg-muted)
}

.rail-icon:hover {
    background: var(--accent-soft);
    color: var(--fg-secondary);
    transform: translateY(-1px)
}

.rail-icon.act {
    background: var(--accent-soft);
    color: var(--accent)
}

.rail-icon.act::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 18px;
    background: var(--accent);
    border-radius: 0 3px 3px 0;
    transition: height var(--duration-normal) var(--ease-spring)
}

.ri-ico {
    font-size: 14px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center
}

.ri-txt {
    font-size: 7px;
    color: var(--fg-muted);
    font-weight: 600;
    letter-spacing: .2px;
    transition: color var(--duration-fast)
}

.rail-icon.act .ri-txt {
    color: var(--accent)
}

.rail-spacer {
    flex: 1
}

#panelToggleBtn .ri-ico svg {
    transition: transform var(--duration-normal) var(--ease-out)
}

.sb-panel.collapsed~.icon-rail #panelToggleBtn .ri-ico svg,
.sb.left .sb-panel.collapsed+.icon-rail #panelToggleBtn .ri-ico svg {
    transform: rotate(180deg)
}

/* ==================== CONTENT PANEL ==================== */
.sb-panel {
    width: 220px;
    min-width: 220px;
    background: var(--bg-primary);
    overflow-y: auto;
    overflow-x: hidden;
    transition: width var(--duration-normal) var(--ease-out), min-width var(--duration-normal) var(--ease-out), opacity var(--duration-fast);
    scrollbar-width: thin;
    scrollbar-color: var(--border-primary) transparent
}

.sb-panel::-webkit-scrollbar {
    width: 4px
}

.sb-panel::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: 2px
}

.sb-panel.collapsed {
    width: 0;
    min-width: 0;
    opacity: 0;
    overflow: hidden
}

.panel-hdr {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-primary)
}

.panel-title {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: var(--fg-muted);
    font-weight: 700
}

.panel-close {
    background: none;
    border: none;
    color: var(--fg-muted);
    cursor: pointer;
    font-size: 10px;
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast)
}

.panel-close:hover {
    background: var(--accent-softer);
    color: var(--fg-primary)
}

.panel-content {
    display: none;
    flex-direction: column;
    gap: 8px
}

.panel-content.act {
    display: flex
}

/* ==================== LOGO ==================== */
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-primary)
}

.logo-i {
    width: 26px;
    height: 26px;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: #fff;
    font-weight: 800
}

.logo-t {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: -.3px
}

.logo-t b {
    color: var(--accent)
}

.logo-v {
    font-size: 7px;
    color: var(--fg-inverted);
    background: var(--accent);
    padding: 2px 5px;
    border-radius: var(--radius-sm);
    margin-left: auto;
    font-weight: 700
}

/* ==================== COLLAPSIBLE SECTIONS ==================== */
.sec {
    display: flex;
    flex-direction: column;
    gap: 6px
}

.sec-h {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    user-select: none;
    padding: 1px 0
}

.sec-t {
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--fg-muted);
    font-weight: 600;
    transition: color var(--duration-fast)
}

.sec-h:hover .sec-t {
    color: var(--fg-tertiary)
}

.sec-b {
    font-size: 7px;
    background: var(--accent-soft);
    color: var(--accent);
    padding: 2px 5px;
    border-radius: var(--radius-sm);
    font-weight: 600
}

.sec-arrow {
    font-size: 8px;
    color: var(--fg-muted);
    transition: transform var(--duration-normal) var(--ease-spring)
}

.sec-arrow.collapsed {
    transform: rotate(-90deg)
}

.sec-body {
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: all var(--duration-slow) ease
}

.sec-body.collapsed {
    max-height: 0 !important;
    overflow: hidden;
    opacity: 0;
    margin: 0;
    padding: 0
}

.divider {
    height: 1px;
    background: var(--border-primary);
    margin: 1px 0
}

/* ==================== STAGE ==================== */
.stage-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden
}

.stage-bar {
    height: 38px;
    min-height: 38px;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    backdrop-filter: blur(var(--glass-blur))
}

.stage-bar-l {
    display: flex;
    align-items: center;
    gap: 8px
}

.stage-bar .si {
    font-size: 9px;
    color: var(--fg-muted)
}

.stage-bar .sd {
    font-size: 9px;
    color: var(--fg-tertiary);
    font-variant-numeric: tabular-nums
}

.zd {
    font-size: 9px;
    color: var(--fg-tertiary);
    background: var(--bg-root);
    padding: 3px 6px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-primary);
    font-variant-numeric: tabular-nums
}

.zb {
    width: 22px;
    height: 22px;
    background: var(--bg-root);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-sm);
    color: var(--fg-tertiary);
    cursor: pointer;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration-fast) var(--ease-out)
}

.zb:hover {
    border-color: var(--border-hover);
    color: var(--fg-primary);
    background: var(--bg-tertiary);
    transform: translateY(-1px)
}

.zb:active {
    transform: translateY(0) scale(.97)
}

.stage-bar-r {
    display: flex;
    align-items: center;
    gap: 4px
}

.stage {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-root);
    position: relative;
    overflow: hidden;
    background-image: radial-gradient(var(--stage-dot) 1px, transparent 1px);
    background-size: var(--stage-dot-size) var(--stage-dot-size)
}

.stage-cv {
    position: relative;
    transition: transform var(--duration-slow) var(--ease-out)
}

/* ==================== TABS ==================== */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-primary);
    margin-bottom: 2px;
    position: relative
}

.tab {
    flex: 1;
    padding: 6px 2px;
    font-size: 7px;
    font-weight: 600;
    text-align: center;
    color: var(--fg-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--duration-normal) var(--ease-out);
    letter-spacing: .3px;
    text-transform: uppercase
}

.tab:hover {
    color: var(--fg-tertiary)
}

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

.tab-body {
    display: none
}

.tab-body.act {
    display: flex;
    flex-direction: column;
    gap: 8px
}

/* Canvas Size Selector */
.sd-sel {
    background: transparent;
    border: none;
    color: var(--muted);
    font-size: 11px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    padding-right: 12px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right center;
}

.sd-sel:hover {
    color: var(--fg)
}