/* ── v1.1.56 "Why?" affordance + AIExplanation modal ────────────────
   The Why? button appears under an AI message once its reasoning trace
   has been persisted. Deliberately quiet — text-only, secondary
   colour, only lights up on hover. Mirrors the v1.1.43 thinking-util
   pattern.

   The AIExplanation modal is the cross-surface reasoning inspector.
   Reused by Plan My Day / Inbox Triage / Morning Brief later; for
   Stage 1 only the chat surface opens it. Calm card on a softly-dim
   backdrop, scrollable body, ESC / backdrop / × all close. */

.cadeo-chat-message-footer {
    margin-top: 4px;
    display: flex;
    justify-content: flex-end;
}
.cadeo-chat-why-btn {
    background: transparent;
    border: 0;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
    font-weight: 500;
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-in-out), color var(--duration-fast) var(--ease-in-out);
}
.cadeo-chat-why-btn:hover {
    background: var(--bg-secondary);
    color: #4A90D9;
}
.cadeo-chat-why-btn:focus-visible {
    outline: var(--focus-outline);
    outline-offset: var(--focus-outline-offset);
}

/* Modal — full-viewport overlay; calm card centred. */
.cadeo-aix-overlay {
    position: fixed;
    inset: 0;
    background: var(--modal-overlay-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: calc(var(--z-layer-modal) - 1);
    animation: cadeo-aix-fade-in var(--duration-normal) var(--ease-in-out);
}
.cadeo-aix-modal {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-3);
    width: min(720px, 96vw);
    max-height: 86vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: cadeo-aix-slide-up var(--duration-normal) var(--ease-in-out);
}
@keyframes cadeo-aix-fade-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes cadeo-aix-slide-up {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
    .cadeo-aix-overlay,
    .cadeo-aix-modal { animation: none; }
}

.cadeo-aix-header {
    position: relative;
    padding: 18px 56px 14px 24px;
    border-bottom: 1px solid var(--border-light);
}
.cadeo-aix-eyebrow {
    font-size: var(--font-size-2xs);
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    margin-bottom: 6px;
}
.cadeo-aix-title {
    margin: 0;
    font-size: var(--font-size-18);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}
.cadeo-aix-sub {
    margin-top: 4px;
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}
.cadeo-aix-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 32px;
    height: 32px;
    border: 0;
    background: transparent;
    color: var(--text-secondary);
    font-size: var(--font-size-22);
    line-height: 1;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-in-out), color var(--duration-fast) var(--ease-in-out);
}
.cadeo-aix-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.cadeo-aix-body {
    padding: 20px 24px 24px;
    overflow-y: auto;
    flex: 1 1 auto;
}

.cadeo-aix-section {
    margin-bottom: 20px;
}
.cadeo-aix-section:last-child {
    margin-bottom: 0;
}
.cadeo-aix-section-title {
    margin: 0 0 10px;
    font-size: var(--font-size-12);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
}

/* Summary grid — small label/value rows */
.cadeo-aix-summary {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 12px 14px;
}
.cadeo-aix-summary-row {
    display: flex;
    gap: 12px;
    padding: 4px 0;
    font-size: var(--font-size-sm);
}
.cadeo-aix-summary-label {
    min-width: 80px;
    color: var(--text-tertiary);
    font-weight: 500;
    flex-shrink: 0;
}
.cadeo-aix-summary-value {
    color: var(--text-primary);
    overflow-wrap: anywhere;
}

/* Phase list — visual rhyme with the inline phase strip */
.cadeo-aix-phase-list {
    margin: 0;
    padding: 0;
    list-style: none;
}
.cadeo-aix-phase-item {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 4px 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}
.cadeo-aix-phase-item-failed {
    color: var(--color-amber-text);
}
.cadeo-aix-phase-glyph {
    color: #4A90D9;
    width: 12px;
    flex-shrink: 0;
}
.cadeo-aix-phase-item-failed .cadeo-aix-phase-glyph {
    color: var(--color-amber-text);
}
.cadeo-aix-phase-name {
    font-weight: 500;
}
.cadeo-aix-phase-meta {
    color: var(--text-tertiary);
    margin-left: 4px;
}
.cadeo-aix-phase-item-failed .cadeo-aix-phase-meta {
    color: var(--color-amber-text);
}

/* Tool-call card — args + result side by side, args monospace */
.cadeo-aix-tool-card {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 10px 12px;
    margin-bottom: 10px;
    background: var(--bg-secondary);
}
.cadeo-aix-tool-card:last-child { margin-bottom: 0; }
.cadeo-aix-tool-head {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--font-size-sm);
    margin-bottom: 8px;
}
.cadeo-aix-tool-name {
    font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
    font-weight: 600;
    color: var(--text-primary);
}
.cadeo-aix-tool-status {
    padding: 1px 8px;
    border-radius: var(--radius-full);
    background: rgba(74, 144, 217, 0.12);
    color: #4A90D9;
    font-size: var(--font-size-xs);
    font-weight: 600;
}
.cadeo-aix-tool-status-failed {
    background: rgba(245, 158, 11, 0.16);
    color: var(--color-amber-text);
}
.cadeo-aix-tool-ms {
    margin-left: auto;
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
}
.cadeo-aix-tool-sublabel {
    font-size: var(--font-size-2xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    margin: 6px 0 4px;
}
.cadeo-aix-tool-args {
    margin: 0;
    padding: 8px 10px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
    font-size: var(--font-size-12);
    color: var(--text-primary);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 200px;
    overflow-y: auto;
}
.cadeo-aix-tool-result {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    padding: 4px 0;
}

.cadeo-aix-source-list {
    margin: 0;
    padding: 0;
    list-style: none;
}
.cadeo-aix-source-item {
    display: flex;
    gap: 8px;
    padding: 4px 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}
.cadeo-aix-source-kind {
    background: var(--bg-secondary);
    padding: 1px 8px;
    border-radius: var(--radius-full);
    color: var(--text-tertiary);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: lowercase;
}

.cadeo-aix-answer {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    background: var(--bg-secondary);
    padding: 10px 12px;
    border-radius: var(--radius-md);
    white-space: pre-wrap;
}

.cadeo-aix-thinking-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
}
.cadeo-aix-thinking-note {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    font-style: italic;
}
.cadeo-aix-thinking-body {
    margin: 0;
    padding: 12px 14px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    white-space: pre-wrap;
    max-height: 320px;
    overflow-y: auto;
    line-height: 1.55;
    user-select: text;
}

.cadeo-aix-empty {
    text-align: center;
    color: var(--text-tertiary);
    font-style: italic;
    padding: 40px 20px;
}

/* Error card — quiet warning, not catastrophic */
.cadeo-chat-error-card {
    margin: 4px 0;
    padding: 12px 14px;
    background: var(--bg-secondary);
    border: 1px solid rgba(245, 158, 11, 0.45);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}
.cadeo-chat-error-title {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.cadeo-chat-error-actions {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}