/* ---------- icons ---------- */
.ic {
    stroke: currentColor;
    fill: none;
}

/* ---------- dashboard shell ---------- */
.app-shell {
    display: flex;
    align-items: flex-start;
    min-height: 100vh;
}

.app-main {
    flex: 1;
    min-width: 0;
}

.app-sidebar {
    flex: none;
    width: var(--sidebar-w);
    position: sticky;
    top: 0;
    height: 100vh;
    z-index: 45;
    display: flex;
    flex-direction: column;
    background: var(--bg-raised);
    border-right: 1.5px solid var(--text);
    transition: width .16s ease;
}

:root[data-view="marketing"] .app-sidebar,
:root[data-view="marketing"] .sidebar-scrim {
    display: none;
}

.sb-head {
    height: 68px;
    flex: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 0 16px;
    border-bottom: 1.5px solid var(--text);
}

.sb-head .sidebar-toggle {
    flex: none;
    width: 30px;
    height: 30px;
    border-color: var(--border-strong);
}

.sb-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 18px 12px 12px;
}

.sb-group+.sb-group {
    margin-top: 18px;
}

.sb-group h5 {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .63rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .13em;
    color: var(--text-muted);
    margin: 0 0 6px 10px;
    white-space: nowrap;
}

.sb-link {
    display: flex;
    align-items: center;
    gap: 11px;
    width: 100%;
    padding: 9px 10px;
    margin-bottom: 2px;
    background: none;
    border: 1.5px solid transparent;
    border-radius: 2px;
    color: var(--text-muted);
    font-size: .87rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    white-space: nowrap;
}

.sb-link:hover {
    background: var(--bg-sunken);
    color: var(--text);
}

.sb-link.active {
    background: var(--bg);
    border-color: var(--text);
    color: var(--text);
}

.sb-link.active .ic {
    color: var(--accent);
}

.sb-link .ic {
    flex: none;
}

.sb-label {
    overflow: hidden;
    text-overflow: ellipsis;
}

.sb-foot {
    flex: none;
    padding: 12px;
    border-top: 2px dashed var(--border-strong);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sb-meter {
    padding: 2px 10px 0;
}

.sb-meter .sb-meter-top {
    display: flex;
    justify-content: space-between;
    font-family: 'IBM Plex Mono', monospace;
    font-size: .64rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.sb-meter .sb-meter-bar {
    height: 6px;
    border: 1.5px solid var(--text);
    border-radius: 2px;
    background: var(--bg-sunken);
    overflow: hidden;
}

.sb-meter .sb-meter-fill {
    height: 100%;
    background: var(--accent);
}

.sb-user {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 7px 8px;
    border: 1.5px solid var(--border-strong);
    border-radius: 2px;
    min-width: 0;
}

.sb-user .user-avatar {
    flex: none;
}

.sb-user .sb-user-text {
    min-width: 0;
    overflow: hidden;
    line-height: 1.25;
}

.sb-user .sb-user-name {
    display: block;
    font-size: .82rem;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sb-user .sb-user-plan {
    margin-left: 6px;
    padding: 0 5px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: .6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--accent);
    border: 1px solid var(--accent);
    border-radius: 2px;
    vertical-align: 1px;
}

.sb-user .sb-user-plan.is-paused {
    color: var(--text-muted);
    border-color: var(--border-strong);
    border-style: dashed;
}

.sb-user .sb-user-mail {
    display: block;
    font-size: .68rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sb-user .icon-btn {
    margin-left: auto;
    width: 28px;
    height: 28px;
    flex: none;
    border-color: var(--border-strong);
}

/* collapsed rail */
:root[data-sidebar="collapsed"] {
    --sidebar-w: 74px;
}

:root[data-sidebar="collapsed"] .sb-label,
:root[data-sidebar="collapsed"] .sb-group h5,
:root[data-sidebar="collapsed"] .sb-brand .word,
:root[data-sidebar="collapsed"] .sb-meter,
:root[data-sidebar="collapsed"] .sb-user-text {
    display: none;
}

:root[data-sidebar="collapsed"] .sb-head {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: auto;
    gap: 10px;
    padding: 14px 0 12px;
}

:root[data-sidebar="collapsed"] .sb-link,
:root[data-sidebar="collapsed"] .sb-user {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}

:root[data-sidebar="collapsed"] .sb-user {
    border-color: transparent;
    gap: 0;
    flex-direction: column;
}

:root[data-sidebar="collapsed"] .sb-user .icon-btn {
    margin-left: 0;
    margin-top: 8px;
}

:root[data-sidebar="collapsed"] .sb-group+.sb-group {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
}

.sidebar-scrim {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(20, 17, 10, 0.55);
    z-index: 44;
}

/* ---------- topbar (app view) ---------- */
.topbar-title {
    flex: 1;
    min-width: 0;
    display: none;
    flex-direction: column;
    justify-content: center;
}

.topbar-title .eyebrow {
    margin-bottom: 3px;
    line-height: 1;
}

.topbar-title h2 {
    margin: 0;
    font-size: 1.5rem;
    line-height: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.icon-btn.app-menu-btn {
    display: none;
}

:root[data-view="app"] .topbar-title {
    display: flex;
}

:root[data-view="app"] .site-header .brand,
:root[data-view="app"] #authArea,
:root[data-view="app"] .site-footer {
    display: none;
}

:root[data-view="app"] .header-inner {
    max-width: none;
    padding: 0 28px;
    gap: 18px;
}

:root[data-view="app"] .wrap {
    max-width: 1240px;
    padding: 0 28px;
}

:root[data-view="app"] .page>section:first-child {
    padding-top: 40px;
}

/* ---------- exam mode: the room takes the whole screen ---------- */
:root[data-exam="on"] .app-sidebar,
:root[data-exam="on"] .sidebar-scrim,
:root[data-exam="on"] .site-header {
    display: none;
}

:root[data-exam="on"] .exam-bar {
    top: 0;
}

:root[data-exam-lock="on"] .exam-close,
:root[data-exam-lock="on"] .exam-leave-btn {
    display: none;
}

/* ---------- tablet and down: sidebar becomes a drawer ---------- */
@media (max-width: 900px) {

    /* sidebar becomes an off-canvas drawer */
    :root[data-view="app"] .app-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        height: 100%;
        width: min(280px, 86vw);
        padding-bottom: var(--safe-b);
        transform: translateX(-100%);
        /* hidden, not just off-screen: a closed drawer must not take focus */
        visibility: hidden;
        transition: transform .22s cubic-bezier(.2, .8, .2, 1), visibility 0s linear .22s;
        box-shadow: none;
    }

    :root[data-view="app"][data-drawer="open"] .app-sidebar {
        transform: none;
        visibility: visible;
        transition-delay: 0s;
        box-shadow: var(--shadow);
    }

    :root[data-view="app"][data-drawer="open"] {
        overflow: hidden;
    }

    :root[data-view="app"][data-drawer="open"] .sidebar-scrim {
        display: block;
    }

    /* the drawer always shows full labels, even if the desktop rail is collapsed */
    :root[data-sidebar="collapsed"] .sb-label,
    :root[data-sidebar="collapsed"] .sb-group h5,
    :root[data-sidebar="collapsed"] .sb-meter,
    :root[data-sidebar="collapsed"] .sb-user-text {
        display: block;
    }

    :root[data-sidebar="collapsed"] .sb-brand .word {
        display: flex;
    }

    :root[data-sidebar="collapsed"] .sb-link {
        justify-content: flex-start;
        padding-left: 10px;
        padding-right: 10px;
    }

    :root[data-sidebar="collapsed"] .sb-head {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        height: 68px;
        padding: 0 16px;
    }

    :root[data-view="app"] .app-menu-btn {
        display: flex;
    }

    :root[data-sidebar="collapsed"] .sb-user {
        flex-direction: row;
        justify-content: flex-start;
        gap: 9px;
        padding: 7px 8px;
        border-color: var(--border-strong);
    }

    :root[data-sidebar="collapsed"] .sb-user .icon-btn {
        margin-left: auto;
        margin-top: 0;
    }

    :root[data-sidebar="collapsed"] .sb-group+.sb-group {
        margin-top: 18px;
        padding-top: 0;
        border-top: none;
    }

    :root[data-view="app"] .header-inner {
        padding: 0 20px;
    }

    :root[data-view="app"] .wrap {
        padding: 0 20px;
    }

    .topbar-title h2 {
        font-size: 1.25rem;
    }
}

/* ---------- phone: bottom tab bar ----------
   Four daily study loops plus More (the drawer). Hidden everywhere else:
   the marketing shell has its own header, and the exam room owns the screen. */
.tabbar {
    display: none;
}

@media (max-width: 720px) {
    :root[data-view="app"] .tabbar {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 43;
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        height: calc(var(--tabbar-h) + var(--safe-b));
        padding: 0 4px var(--safe-b);
        background: var(--bg-raised);
        border-top: 1.5px solid var(--text);
    }

    :root[data-exam="on"] .tabbar {
        display: none;
    }

    .tab-link {
        position: relative;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 4px;
        min-width: 0;
        padding: 6px 2px 4px;
        background: none;
        border: none;
        color: var(--text-muted);
        font-family: 'IBM Plex Mono', monospace;
        font-size: .6rem;
        font-weight: 600;
        letter-spacing: .06em;
        text-transform: uppercase;
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }

    .tab-link span {
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .tab-link.active {
        color: var(--text);
    }

    .tab-link.active .ic {
        color: var(--accent);
    }

    /* the active tab wears a short accent bar on the ink rule, like a punched ticket */
    .tab-link.active::before {
        content: '';
        position: absolute;
        top: -1.5px;
        left: 50%;
        width: 28px;
        height: 3px;
        margin-left: -14px;
        background: var(--accent);
    }

    .tab-link:active .ic {
        transform: scale(.92);
    }

    :root[data-view="app"] .app-main {
        padding-bottom: calc(var(--tabbar-h) + var(--safe-b));
    }

    /* More replaces the hamburger on phones */
    :root[data-view="app"] .app-menu-btn {
        display: none;
    }

    :root[data-view="app"] .header-inner {
        height: 58px;
        padding: 0 16px;
        gap: 12px;
    }

    :root[data-view="app"] .wrap {
        padding: 0 16px;
    }

    :root[data-view="app"] .page>section:first-child {
        padding-top: 28px;
    }

    .topbar-title h2 {
        font-size: 1.2rem;
    }
}