/* ============================================================
   ATLAS SESSION PANEL
   Shared safe-first session UI.

   Structure and interaction live here.
   World and appearance values come from atlas-modal-theme.css.
   ============================================================ */

.atlas-session-overlay,
.atlas-session-overlay * {
    box-sizing: border-box;
}

.atlas-session-overlay {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    overflow: hidden;
    overscroll-behavior: contain;
    background: var(--atlas-modal-overlay-bg);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.atlas-session-overlay.is-open {
    display: flex;
    animation: atlasSessionFadeIn 0.18s ease both;
}

.atlas-session-panel {
    display: flex;
    width: 100%;
    max-width: var(--atlas-overlay-width);
    max-height: min(90svh, 46rem);
    flex-direction: column;
    overflow: hidden;
    overscroll-behavior: contain;
    border: 1px solid var(--atlas-modal-border);
    border-radius: var(--atlas-modal-radius-lg);
    background: var(--atlas-modal-surface);
    color: var(--atlas-modal-text);
    box-shadow: var(--atlas-modal-shadow);
    font-family: var(--atlas-modal-font-body);
    animation: atlasSessionSlideIn 0.22s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ============================================================
   HEADER
   ============================================================ */

.atlas-session-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.15rem 1.4rem;
    border-bottom: 1px solid var(--atlas-modal-border);
    background: var(--atlas-modal-surface-low);
}

.atlas-session-header-label {
    margin: 0;
    color: var(--atlas-modal-muted);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.atlas-session-close {
    display: inline-flex;
    width: 2rem;
    height: 2rem;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: 999px;
    background: transparent;
    color: var(--atlas-modal-muted);
    cursor: pointer;
    font: inherit;
    font-size: 1.35rem;
    line-height: 1;
}

.atlas-session-close:hover,
.atlas-session-close:focus-visible {
    border-color: var(--atlas-modal-border-strong);
    background: var(--atlas-modal-control-hover);
    color: var(--atlas-modal-heading);
}

.atlas-session-close:focus-visible {
    outline: 2px solid var(--atlas-modal-accent);
    outline-offset: 2px;
}

/* ============================================================
   PANEL VIEWS
   ============================================================ */

.atlas-session-safe,
.atlas-session-manage {
    min-height: 0;
    padding: 1.65rem 1.7rem 1.8rem;
}

.atlas-session-safe {
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--atlas-modal-scrollbar) transparent;
}

.atlas-session-manage {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    overflow: hidden;
}

.atlas-session-manage-top {
    flex: 0 0 auto;
}

.atlas-session-list-scroll {
    min-height: 0;
    flex: 1 1 auto;
    margin-top: 0.85rem;
    padding-right: 0.2rem;
    padding-bottom: 0.15rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: var(--atlas-modal-scrollbar) transparent;
}

.atlas-session-safe::-webkit-scrollbar,
.atlas-session-list-scroll::-webkit-scrollbar {
    width: 10px;
}

.atlas-session-safe::-webkit-scrollbar-track,
.atlas-session-list-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.atlas-session-safe::-webkit-scrollbar-thumb,
.atlas-session-list-scroll::-webkit-scrollbar-thumb {
    border: 3px solid transparent;
    border-radius: 999px;
    background: var(--atlas-modal-scrollbar);
    background-clip: padding-box;
}

.atlas-session-safe::-webkit-scrollbar-thumb:hover,
.atlas-session-list-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--atlas-modal-scrollbar-hover);
    background-clip: padding-box;
}

.atlas-session-safe[hidden],
.atlas-session-manage[hidden] {
    display: none;
}

.atlas-session-active-name {
    margin: 0;
    color: var(--atlas-modal-heading);
    font-family: var(--atlas-modal-font-display);
    font-size: clamp(1.65rem, 4vw, 2.15rem);
    font-weight: 400;
    line-height: 1.12;
}

.atlas-session-context-title {
    margin: 1.25rem 0 0.35rem;
    color: var(--atlas-modal-heading);
    font-size: 1rem;
    font-weight: 650;
}

.atlas-session-context-description {
    margin: 0;
    color: var(--atlas-modal-muted);
    font-size: 0.92rem;
    line-height: 1.65;
}

/* ============================================================
   PRIMARY AND NAVIGATION ACTIONS
   ============================================================ */

.atlas-session-primary {
    width: 100%;
    margin-top: 1.55rem;
    padding: 0.82rem 1rem;
    border: 1px solid var(--atlas-modal-accent);
    border-radius: var(--atlas-modal-radius-sm);
    background: var(--atlas-modal-accent);
    color: var(--atlas-modal-accent-ink);
    cursor: pointer;
    font: inherit;
    font-weight: 650;
}

.atlas-session-primary:hover {
    border-color: var(--atlas-modal-accent-hover);
    background: var(--atlas-modal-accent-hover);
    box-shadow: 0 8px 22px rgba(var(--atlas-modal-accent-rgb), 0.18);
}

.atlas-session-primary:focus-visible {
    outline: 3px solid rgba(var(--atlas-modal-accent-rgb), 0.32);
    outline-offset: 3px;
    border-color: var(--atlas-modal-accent-hover);
    background: var(--atlas-modal-accent-hover);
}

.atlas-session-manage-link,
.atlas-session-back {
    border: 0;
    background: transparent;
    color: var(--atlas-modal-accent);
    cursor: pointer;
    font: inherit;
    font-size: 0.86rem;
    font-weight: 600;
    text-decoration: underline;
    text-decoration-color: transparent;
    text-underline-offset: 0.18em;
}

.atlas-session-manage-link {
    display: block;
    margin: 1.2rem auto 0;
}

.atlas-session-back {
    padding: 0;
}

.atlas-session-manage-link:hover,
.atlas-session-manage-link:focus-visible,
.atlas-session-back:hover,
.atlas-session-back:focus-visible {
    color: var(--atlas-modal-accent-hover);
    text-decoration-color: currentColor;
}

.atlas-session-manage-link:focus-visible,
.atlas-session-back:focus-visible {
    outline: 2px solid var(--atlas-modal-accent);
    outline-offset: 3px;
    border-radius: 3px;
}

.atlas-session-manage h2 {
    margin: 1.15rem 0 1.1rem;
    color: var(--atlas-modal-heading);
    font-size: 1.2rem;
}

/* ============================================================
   SEARCH AND CREATE INPUTS
   ============================================================ */

.atlas-session-search-label,
.atlas-session-create label {
    display: block;
    margin-bottom: 0.45rem;
    color: var(--atlas-modal-muted);
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.atlas-session-search,
.atlas-session-create input {
    width: 100%;
    min-width: 0;
    padding: 0.7rem 0.85rem;
    border: 1.5px solid var(--atlas-modal-border-strong);
    border-radius: var(--atlas-modal-radius-sm);
    outline: none;
    background: var(--atlas-modal-control-surface);
    color: var(--atlas-modal-heading);
    caret-color: var(--atlas-modal-accent);
    font: inherit;
    font-size: 0.88rem;
}

.atlas-session-search::placeholder,
.atlas-session-create input::placeholder {
    color: var(--atlas-modal-faint);
}

.atlas-session-search:focus,
.atlas-session-create input:focus {
    border-color: var(--atlas-modal-accent);
}

/* ============================================================
   SESSION LIST
   ============================================================ */

.atlas-session-list {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.atlas-session-row {
    display: grid;
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--atlas-modal-border);
    border-radius: var(--atlas-modal-radius-sm);
    background: var(--atlas-modal-row-surface);
}

.atlas-session-row.is-active {
    border-color: var(--atlas-modal-accent);
    background: var(--atlas-modal-row-active);
}

.atlas-session-row-main {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.65rem;
    padding: 0.72rem 0.78rem;
}

.atlas-session-row-icon {
    display: inline-flex;
    width: 1.9rem;
    height: 1.9rem;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(var(--atlas-modal-accent-rgb), 0.24);
    border-radius: 999px;
    background: var(--atlas-modal-accent-bg);
    color: var(--atlas-modal-accent);
}

.atlas-session-row-icon svg {
    width: 1rem;
    height: 1rem;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.7;
}

.atlas-session-row-identity {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 0.55rem;
}

.atlas-session-row-name {
    flex: 1 1 auto;
    min-width: 0;
    overflow: hidden;
    color: var(--atlas-modal-heading);
    font-size: 0.9rem;
    font-weight: 600;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.atlas-session-active-badge {
    flex: 0 0 auto;
    padding: 0.14rem 0.48rem;
    border-radius: 999px;
    background: var(--atlas-modal-accent);
    color: var(--atlas-modal-accent-ink);
    font-size: 0.66rem;
    font-weight: 700;
}

.atlas-session-row-controls {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* ============================================================
   ROW ACTIONS
   ============================================================ */

.atlas-session-row-action {
    width: auto;
    padding: 0.38rem 0.58rem;
    border: 1px solid var(--atlas-modal-border);
    border-radius: 8px;
    background: var(--atlas-modal-control-surface);
    color: var(--atlas-modal-muted);
    cursor: pointer;
    font: inherit;
    font-size: 0.72rem;
    font-weight: 600;
}

.atlas-session-row-action.is-switch {
    border-color: rgba(var(--atlas-modal-accent-rgb), 0.28);
    color: var(--atlas-modal-accent);
}

.atlas-session-row-action:hover,
.atlas-session-row-action:focus-visible {
    border-color: var(--atlas-modal-accent-soft);
    background: var(--atlas-modal-control-hover);
    color: var(--atlas-modal-accent);
}

.atlas-session-row-action:focus-visible {
    outline: 2px solid rgba(var(--atlas-modal-accent-rgb), 0.24);
    outline-offset: 2px;
}

.atlas-session-row-action.is-danger:hover,
.atlas-session-row-action.is-danger:focus-visible {
    border-color: var(--atlas-modal-danger-border);
    background: var(--atlas-modal-danger-bg);
    color: var(--atlas-modal-danger-text);
}

.atlas-session-row-more {
    display: inline-flex;
    width: 2rem;
    height: 2rem;
    align-items: center;
    justify-content: center;
    padding: 0 0 0.26rem;
    border: 1px solid transparent;
    border-radius: 8px;
    background: transparent;
    color: var(--atlas-modal-faint);
    cursor: pointer;
    font: inherit;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1;
}

.atlas-session-row-more:hover,
.atlas-session-row-more:focus-visible,
.atlas-session-row-more[aria-expanded="true"] {
    border-color: var(--atlas-modal-border-strong);
    background: var(--atlas-modal-control-surface);
    color: var(--atlas-modal-accent);
}

.atlas-session-row-more:focus-visible {
    outline: 2px solid rgba(var(--atlas-modal-accent-rgb), 0.24);
    outline-offset: 2px;
}

/* ============================================================
   SECONDARY ROW ACTIONS
   ============================================================ */

.atlas-session-row-secondary {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    padding: 0.48rem 0.78rem 0.55rem 3.33rem;
    border-top: 1px solid var(--atlas-modal-border);
    background: var(--atlas-modal-row-secondary);
}

.atlas-session-row-secondary[hidden] {
    display: none;
}

.atlas-session-row-secondary .atlas-session-row-action {
    min-height: 1.75rem;
    padding: 0.25rem 0.62rem;
    border-color: var(--atlas-modal-border);
    border-radius: 999px;
    background: var(--atlas-modal-control-surface);
    color: var(--atlas-modal-muted);
    line-height: 1.2;
}

.atlas-session-row-secondary .atlas-session-row-action:hover,
.atlas-session-row-secondary .atlas-session-row-action:focus-visible {
    border-color: var(--atlas-modal-accent-soft);
    background: var(--atlas-modal-control-hover);
    color: var(--atlas-modal-accent);
}

.atlas-session-row-secondary .atlas-session-row-action.is-danger:hover,
.atlas-session-row-secondary .atlas-session-row-action.is-danger:focus-visible {
    border-color: var(--atlas-modal-danger-border);
    background: var(--atlas-modal-danger-bg);
    color: var(--atlas-modal-danger-text);
}

/* Host pages may apply generic transition systems. Session-row
   feedback remains immediate and predictable. */
.atlas-session-row,
.atlas-session-row::before,
.atlas-session-row::after,
.atlas-session-row-main,
.atlas-session-row-icon,
.atlas-session-row-icon svg,
.atlas-session-row-name,
.atlas-session-active-badge,
.atlas-session-row-controls,
.atlas-session-row-action,
.atlas-session-row-action::before,
.atlas-session-row-action::after,
.atlas-session-row-more,
.atlas-session-row-more::before,
.atlas-session-row-more::after,
.atlas-session-row-secondary {
    transition: none;
}

/* ============================================================
   EMPTY AND CREATE STATES
   ============================================================ */

.atlas-session-search-empty {
    margin: 1rem 0 0;
    color: var(--atlas-modal-muted);
    font-size: 0.84rem;
}

.atlas-session-create {
    flex: 0 0 auto;
    margin-top: 0.8rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--atlas-modal-border);
}

.atlas-session-create-toggle {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0;
    border: 0;
    background: transparent;
    color: var(--atlas-modal-accent);
    cursor: pointer;
    font: inherit;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.atlas-session-create-toggle:hover,
.atlas-session-create-toggle:focus-visible {
    color: var(--atlas-modal-accent-hover);
}

.atlas-session-create-toggle:focus-visible {
    outline: 2px solid var(--atlas-modal-accent);
    outline-offset: 3px;
    border-radius: 3px;
}

.atlas-session-create-fields {
    margin-top: 0.75rem;
}

.atlas-session-create-fields[hidden] {
    display: none;
}

.atlas-session-create-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.55rem;
}

.atlas-session-create button[type="submit"] {
    padding: 0.65rem 0.95rem;
    border: 1px solid var(--atlas-modal-accent);
    border-radius: var(--atlas-modal-radius-sm);
    background: var(--atlas-modal-accent);
    color: var(--atlas-modal-accent-ink);
    cursor: pointer;
    font: inherit;
    font-weight: 650;
}

.atlas-session-create button[type="submit"]:hover {
    border-color: var(--atlas-modal-accent-hover);
    background: var(--atlas-modal-accent-hover);
}

.atlas-session-create button[type="submit"]:focus-visible {
    outline: 3px solid rgba(var(--atlas-modal-accent-rgb), 0.32);
    outline-offset: 3px;
}

.atlas-session-create-error {
    margin: 0;
    color: var(--atlas-modal-danger-text);
    font-size: 0.76rem;
}

.atlas-session-create-error:not(:empty) {
    margin-top: 0.45rem;
}

/* ============================================================
   RESPONSIVE LAYOUT
   ============================================================ */

@media (max-width: 680px) {
    .atlas-session-overlay {
        align-items: flex-end;
        padding: 0;
    }

    .atlas-session-panel {
        width: 100%;
        max-width: none;
        max-height: 92svh;
        border-right: 0;
        border-bottom: 0;
        border-left: 0;
        border-radius:
            var(--atlas-modal-radius-lg)
            var(--atlas-modal-radius-lg)
            0
            0;
    }

    .atlas-session-safe,
    .atlas-session-manage {
        padding-right: 1.25rem;
        padding-left: 1.25rem;
    }

    .atlas-session-primary {
        min-height: 3rem;
    }
}

/* ============================================================
   MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    .atlas-session-overlay.is-open,
    .atlas-session-panel {
        animation: none;
    }
}

@keyframes atlasSessionFadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes atlasSessionSlideIn {
    from {
        opacity: 0;
        transform: translateY(0.7rem) scale(0.985);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}