/* Session Horizon ring + shared session dialogs */

.cs-session-horizon-slot {
    --cs-horizon-size: 40px;
    position: relative;
    width: var(--cs-horizon-size);
    height: var(--cs-horizon-size);
    flex-shrink: 0;
}

.cs-session-horizon {
    --cs-horizon-size: 40px;
    --cs-horizon-expanded: 152px;
    /* Match SVG ring inner edge: r=15.5, stroke=3.5 → diameter 27.5 / viewBox 36 */
    --cs-horizon-media-fill: 76.4%;
    --cs-horizon-stroke: #2a6f97;
    --cs-horizon-glow: rgba(42, 111, 151, 0.35);
    position: absolute;
    top: 0;
    right: 0;
    display: inline-grid;
    place-items: center;
    width: var(--cs-horizon-size);
    height: var(--cs-horizon-size);
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 50%;
    color: inherit;
    z-index: 1;
    overflow: hidden;
    transition:
        width 0.42s cubic-bezier(0.22, 1, 0.36, 1),
        height 0.42s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.42s ease;
}

.cs-session-horizon.is-expanded {
    width: var(--cs-horizon-expanded);
    height: var(--cs-horizon-expanded);
    z-index: 1300;
    box-shadow: 0 10px 28px rgba(15, 23, 32, 0.18);
    overflow: visible;
}

.cs-session-horizon:focus-visible {
    outline: 2px solid var(--color-primary, #2a6f97);
    outline-offset: 2px;
}

.cs-session-horizon__ring {
    position: absolute;
    inset: 0;
    z-index: 2;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
    filter: drop-shadow(0 0 0 transparent);
    transition: filter 0.55s ease;
    pointer-events: none;
}

.cs-session-horizon.is-ring-updating .cs-session-horizon__ring {
    filter: drop-shadow(0 0 3px var(--cs-horizon-glow));
}

.cs-session-horizon__ring-track {
    fill: none;
    stroke: rgba(31, 41, 51, 0.18);
    stroke-width: 3.5;
}

.cs-session-horizon__ring-progress {
    fill: none;
    stroke: var(--cs-horizon-stroke);
    stroke-width: 3.5;
    stroke-linecap: round;
    transition:
        stroke-dashoffset 0.9s cubic-bezier(0.22, 1, 0.36, 1),
        stroke 0.45s ease,
        opacity 0.45s ease;
}

.cs-session-horizon.is-calm {
    --cs-horizon-stroke: #2a6f97;
    --cs-horizon-glow: rgba(42, 111, 151, 0.4);
}

.cs-session-horizon.is-caution {
    --cs-horizon-stroke: #d4891a;
    --cs-horizon-glow: rgba(212, 137, 26, 0.45);
}

.cs-session-horizon.is-critical {
    --cs-horizon-stroke: #d64545;
    --cs-horizon-glow: rgba(214, 69, 69, 0.5);
}

.cs-session-horizon.is-expired {
    --cs-horizon-stroke: #8a3030;
    --cs-horizon-glow: rgba(138, 48, 48, 0.35);
}

@media (prefers-reduced-motion: no-preference) {
    .cs-session-horizon.is-critical .cs-session-horizon__ring-progress {
        animation: cs-horizon-pulse 1.2s ease-in-out infinite;
    }
}

@media (prefers-reduced-motion: reduce) {
    .cs-session-horizon {
        transition: width 0.15s linear, height 0.15s linear, box-shadow 0.15s linear;
    }

    .cs-session-horizon__ring-progress {
        transition: stroke-dashoffset 0.2s linear, stroke 0.2s linear;
    }

    .cs-session-horizon.is-ring-updating .cs-session-horizon__ring {
        filter: none;
    }

    .cs-session-horizon__media,
    .cs-session-horizon__time {
        transition: opacity 0.12s linear, transform 0.12s linear !important;
    }
}

@keyframes cs-horizon-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.55; }
}

.cs-session-horizon__media {
    position: relative;
    z-index: 1;
    width: var(--cs-horizon-media-fill);
    height: var(--cs-horizon-media-fill);
    border-radius: 50%;
    overflow: hidden;
    display: grid;
    place-items: center;
    background: transparent;
    box-shadow: none;
    transition:
        width 0.42s cubic-bezier(0.22, 1, 0.36, 1),
        height 0.42s cubic-bezier(0.22, 1, 0.36, 1);
}

.cs-session-horizon__mascot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* Translucent rectangle readout over the mascot */
.cs-session-horizon__time {
    position: absolute;
    z-index: 3;
    width: max-content;
    max-width: calc(100% - 24px);
    height: auto;
    display: grid;
    place-content: center;
    gap: 2px;
    padding: 4px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow:
        inset 0 0 0 1px rgba(255, 255, 255, 0.55),
        0 2px 8px rgba(15, 23, 32, 0.12);
    opacity: 0;
    transform: scale(0.92);
    pointer-events: none;
    text-align: center;
    color: #1f2933;
    white-space: nowrap;
    transition:
        opacity 0.32s ease 0.08s,
        transform 0.42s cubic-bezier(0.22, 1, 0.36, 1);
}

.cs-session-horizon.is-expanded .cs-session-horizon__time {
    opacity: 1;
    transform: scale(1);
}

.cs-session-horizon__time-left {
    display: block;
    font-size: 1.05rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--cs-horizon-stroke);
}

.cs-session-horizon__time-end {
    display: block;
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    color: rgba(31, 41, 51, 0.72);
    line-height: 1.2;
}

.cs-session-horizon.is-critical .cs-session-horizon__time {
    background: rgba(255, 245, 245, 0.78);
}

.cs-session-horizon.is-caution .cs-session-horizon__time {
    background: rgba(255, 249, 240, 0.78);
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Shared dialog chrome (warning + expired) */
.cs-session-dialog {
    border: none;
    border-radius: 12px;
    padding: 0;
    max-width: min(26rem, calc(100vw - 2rem));
    width: 100%;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.22);
    color: #1f2933;
}

.cs-session-dialog::backdrop {
    background: rgba(15, 23, 32, 0.45);
}

.cs-session-dialog__panel {
    margin: 0;
    padding: 1.25rem 1.35rem 1.15rem;
}

.cs-session-dialog__title {
    margin: 0 0 0.5rem;
    font-size: 1.2rem;
    font-weight: 650;
}

.cs-session-dialog__lead {
    margin: 0 0 0.85rem;
    color: #4b5563;
    font-size: 0.95rem;
}

.cs-session-dialog__countdown {
    margin: 0 0 1rem;
    font-size: 1.05rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.cs-session-dialog__details {
    margin: 0 0 1rem;
    font-size: 0.85rem;
    color: #4b5563;
}

.cs-session-dialog__details summary {
    cursor: pointer;
    user-select: none;
}

.cs-session-dialog__meta {
    margin: 0.65rem 0 0;
    display: grid;
    gap: 0.4rem;
}

.cs-session-dialog__row {
    display: grid;
    grid-template-columns: 5rem 1fr;
    gap: 0.4rem;
}

.cs-session-dialog__row dt {
    font-weight: 600;
    color: #374151;
}

.cs-session-dialog__row dd {
    margin: 0;
    word-break: break-word;
}

.cs-session-dialog__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    justify-content: flex-end;
}

.cs-session-dialog__primary,
.cs-session-dialog__secondary {
    border-radius: 8px;
    padding: 0.5rem 0.9rem;
    font-size: 0.92rem;
    cursor: pointer;
    border: 1px solid transparent;
}

.cs-session-dialog__primary {
    background: var(--color-primary, #2a6f97);
    color: #fff;
}

.cs-session-dialog__primary:hover {
    filter: brightness(1.05);
}

.cs-session-dialog__secondary {
    background: #fff;
    border-color: #c5cdd6;
    color: #1f2933;
}

.cs-session-dialog__secondary:hover {
    background: #f3f5f7;
}