/* ============================================================
   Perga Design System — pg-layout.css
   UI-S01-T05: Shell / Sidebar / Main-content layout styles
   Extracted from main.css — main.css entries marked as moved.
   ============================================================ */

/* ── Shell Header ──────────────────────────────────────────── */
.shell-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--pg-header-height, 48px);
    background: var(--pg-header-bg, #354a5f);
    color: #ffffff;
    display: flex;
    align-items: center;
    padding: 0 var(--pg-sp-4, 16px);
    z-index: var(--pg-z-header, 100);
    gap: var(--pg-sp-3, 12px);
}

.shell-header__logo {
    font-weight: 700;
    font-size: 15px;
    white-space: nowrap;
}

.shell-header__logo span {
    color: #5bc0de;
    font-weight: 400;
}

.shell-header__spacer { flex: 1; }

.shell-header__program-badge {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    color: rgba(255, 255, 255, 0.6);
    padding: 5px 10px;
    font-size: 12px;
    cursor: pointer;
    transition: all var(--pg-t-normal, 150ms ease);
    max-width: 420px;
    min-width: 0;
    text-align: left;
}

.shell-header__program-badge:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
}

.shell-header__program-badge--active {
    color: #fff;
    background: rgba(0, 112, 242, 0.3);
    border-color: rgba(0, 112, 242, 0.5);
}

.shell-header__program-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    font-size: 14px;
    flex-shrink: 0;
}

.shell-context-switcher {
    position: relative;
    min-width: 0;
}

.shell-context-summary {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    flex: 1;
}

.shell-context-summary__eyebrow {
    display: none;
}

.shell-context-summary__program,
.shell-context-summary__project {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.shell-context-summary__program {
    color: #fff;
    font-size: 12.5px;
    font-weight: 700;
    flex: 0 1 auto;
}

.shell-context-summary__project {
    color: rgba(255, 255, 255, 0.74);
    font-size: 11px;
    flex: 1 1 auto;
}

.shell-context-summary__project::before {
    content: '·';
    margin-right: 6px;
    color: rgba(255, 255, 255, 0.45);
}

#activeProgramName {
    max-width: none;
}

.shell-header__program-switch {
    font-size: 10px;
    opacity: 0.75;
    transition: opacity var(--pg-t-normal, 150ms ease), transform var(--pg-t-normal, 150ms ease);
    flex-shrink: 0;
}

.shell-header__program-badge:hover .shell-header__program-switch { opacity: 1; }

.shell-context-selector {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    width: min(360px, calc(100vw - 32px));
    display: grid;
    gap: 12px;
    padding: 14px;
    border-radius: 14px;
    border: 1px solid rgba(15, 23, 42, 0.1);
    background: #ffffff;
    box-shadow: 0 20px 36px rgba(15, 23, 42, 0.18);
    z-index: 130;
    color: #0f172a;
}

.shell-context-switcher--open .shell-header__program-switch {
    transform: rotate(180deg);
}

.shell-context-selector[hidden] {
    display: none;
}

.shell-context-selector__header {
    display: grid;
    gap: 4px;
}

.shell-context-selector__title {
    font-size: 13px;
    font-weight: 700;
    color: #0f172a;
}

.shell-context-selector__hint {
    font-size: 12px;
    line-height: 1.5;
    color: #64748b;
}

.shell-context-selector__field {
    display: grid;
    gap: 6px;
    font-size: 11px;
    color: #334155;
}

.shell-context-selector__label {
    font-weight: 600;
    letter-spacing: 0.01em;
}

.shell-context-selector__select {
    width: 100%;
    border-radius: 10px;
    border: 1px solid #cbd5e1;
    background: #f8fafc;
    color: #0f172a;
    font-size: 12px;
    padding: 9px 10px;
    outline: none;
}

.shell-context-selector__select:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.shell-context-selector__select option {
    color: #111827;
}

.shell-context-selector__footer {
    display: flex;
    justify-content: flex-end;
}

.shell-header__actions {
    display: flex;
    align-items: center;
    gap: var(--pg-sp-2, 8px);
}

.shell-header__icon-btn {
    background: none;
    border: none;
    color: #ffffff;
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    font-size: 18px;
    transition: background var(--pg-t-normal, 150ms ease);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.shell-header__icon-btn:hover { background: rgba(255, 255, 255, 0.1); }

/* ── Sidebar ───────────────────────────────────────────────── */
.sidebar {
    position: fixed;
    left: 0;
    top: var(--pg-header-height, 48px);
    bottom: 0;
    width: var(--pg-sidebar-width, 260px);
    background: var(--pg-sidebar-bg, #1d2d3e);
    color: var(--pg-sidebar-text, #bdc3c7);
    overflow-y: auto;
    padding-top: var(--pg-sp-2, 8px);
    z-index: var(--pg-z-sidebar, 90);
    transition: width var(--pg-t-slow, 250ms ease);
}

.sidebar__section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 16px 20px 6px;
    color: #7f8c8d;
}

.sidebar__item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    cursor: pointer;
    transition: background var(--pg-t-normal, 150ms ease);
    font-size: 13px;
    border-left: 3px solid transparent;
}

.sidebar__item:hover {
    background: var(--pg-sidebar-hover, #2c3e50);
}

.sidebar__item.active {
    background: rgba(0, 112, 242, 0.15);
    border-left-color: var(--pg-sidebar-active, #0070f2);
    color: #fff;
}

.sidebar__item-icon {
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar__item--disabled {
    opacity: 0.35;
    pointer-events: none;
    cursor: default;
}

/* ── Main Content ──────────────────────────────────────────── */
.main-content {
    margin-left: var(--pg-sidebar-width, 260px);
    margin-top: var(--pg-header-height, 48px);
    padding: var(--pg-sp-6, 24px);
    min-height: calc(100vh - var(--pg-header-height, 48px));
    transition: margin-left var(--pg-t-slow, 250ms ease);
}

/* ── Modal Overlay ─────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--pg-z-modal-bg, 200);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--pg-t-normal, 150ms ease);
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

/* ── Toast Container ───────────────────────────────────────── */
.toast-container {
    position: fixed;
    top: calc(var(--pg-header-height, 48px) + 12px);
    right: var(--pg-sp-5, 20px);
    z-index: var(--pg-z-toast, 300);
    display: flex;
    flex-direction: column;
    gap: var(--pg-sp-2, 8px);
}

/* ── pg-header (UI-S03-T02) ────────────────────────────────── */
.pg-header {
    display: flex;
    align-items: center;
    gap: var(--pg-sp-4);
    height: var(--pg-header-height, 48px);
    background: var(--pg-header-bg, #354a5f);
    padding: 0 var(--pg-sp-6);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: var(--pg-z-header, 100);
}

.pg-header__left  { display: flex; align-items: center; gap: var(--pg-sp-4); flex: 1; min-width: 0; }
.pg-header__center { flex: 0 0 auto; }
.pg-header__right { display: flex; align-items: center; gap: var(--pg-sp-2); flex-shrink: 0; }

.pg-header__brand { display: flex; align-items: center; gap: 8px; cursor: default; }
.pg-header__brand-name {
    font-weight: 700;
    font-size: 15px;
    color: #fff;
    letter-spacing: -0.3px;
    white-space: nowrap;
}

.pg-header__search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    color: rgba(255,255,255,0.55);
    border-radius: var(--pg-radius-md, 6px);
    padding: 5px 12px;
    font-size: 12px;
    cursor: pointer;
    transition: all var(--pg-t-normal);
    white-space: nowrap;
    font-family: inherit;
}
.pg-header__search-btn:hover { background: rgba(255,255,255,0.14); color: rgba(255,255,255,0.8); }
.pg-header__search-btn kbd {
    background: rgba(255,255,255,0.12);
    border-radius: 3px;
    padding: 1px 5px;
    font-size: 11px;
    font-family: inherit;
}

.pg-header__icon-btn {
    position: relative;
    background: none; border: none;
    color: rgba(255,255,255,0.6);
    width: 32px; height: 32px;
    border-radius: var(--pg-radius-md, 6px);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: all var(--pg-t-normal);
    flex-shrink: 0;
}
.pg-header__icon-btn:hover { background: rgba(255,255,255,0.1); color: #fff; }

.pg-header__notif-dot {
    position: absolute;
    top: 5px; right: 5px;
    width: 7px; height: 7px;
    background: #ef4444;
    border-radius: 50%;
    border: 1.5px solid var(--pg-header-bg, #354a5f);
}

/* Avatar — applied alongside .profile-dropdown__btn */
.pg-header__avatar {
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--pg-color-primary, #0070f2);
    border: 2px solid rgba(255,255,255,0.2) !important;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    display: flex !important;
    align-items: center;
    justify-content: center;
    transition: all var(--pg-t-normal);
    padding: 0 !important;
}
.pg-header__avatar:hover { border-color: rgba(255,255,255,0.5) !important; transform: scale(1.05); }

/* ── Sidebar Collapse (UI-S03-T03) ─────────────────────────── */
.sidebar__collapse-btn {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    width: 100%;
    background: none;
    border: none;
    color: var(--pg-sidebar-text, #bdc3c7);
    padding: 8px 16px;
    cursor: pointer;
    transition: color var(--pg-t-normal);
    font-size: 0;
}
.sidebar__collapse-btn:hover { color: #fff; }
.sidebar__collapse-btn svg { transition: transform var(--pg-t-slow); flex-shrink: 0; }

.sidebar--collapsed { width: var(--pg-sidebar-collapsed, 56px); }

/* Hide text labels and section titles */
.sidebar--collapsed .sidebar__label,
.sidebar--collapsed .sidebar__badge {
    display: none;
}

/* Section titles become thin divider lines */
.sidebar--collapsed .sidebar__section-title {
    font-size: 0;
    padding: 8px 12px 0;
    overflow: hidden;
}
.sidebar--collapsed .sidebar__section-title::after {
    content: '';
    display: block;
    height: 1px;
    background: rgba(255,255,255,0.08);
    border-radius: 1px;
}

/* Center icon in collapsed items */
.sidebar--collapsed .sidebar__item {
    justify-content: center;
    padding: 10px 0;
    position: relative;
}
.sidebar--collapsed .sidebar__item-icon {
    margin: 0;
    width: 24px;
    height: 24px;
}

/* Tooltip on hover */
.sidebar--collapsed .sidebar__item[title]:hover::after {
    content: attr(title);
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%);
    background: #1d2d3e;
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    padding: 5px 10px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    pointer-events: none;
    z-index: 200;
    border: 1px solid rgba(255,255,255,0.1);
}
.sidebar--collapsed .sidebar__item[title]:hover::before {
    content: '';
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-right-color: #1d2d3e;
    pointer-events: none;
    z-index: 200;
}

.sidebar--collapsed .sidebar__collapse-btn {
    justify-content: center;
    padding: 8px;
}
.sidebar--collapsed .sidebar__collapse-btn svg { transform: rotate(180deg); }

/* Sync main-content margin when sidebar collapses */
.sidebar--collapsed ~ .main-content {
    margin-left: var(--pg-sidebar-collapsed, 56px);
}

.context-guard-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border: 1px solid #f59e0b;
    background: #fff7ed;
    color: #7c2d12;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 12px;
}

.context-guard-banner button {
    border: none;
    background: #f59e0b;
    color: #fff;
    border-radius: 6px;
    padding: 6px 10px;
    cursor: pointer;
}