/* ============================================================
   Personalized AI Agents — agentic-loop demo (vanilla port)
   Light theme · cool palette · no gradients · container-query
   driven so internal text scales with embed width. All classes
   prefixed `pa-` to isolate from the rest of the site.
   ============================================================ */

.pa-section {
    --pa-bg:          #F7F5FB;
    --pa-bg-card:     #FFFFFF;
    --pa-line:        #E4DEF1;
    --pa-line-soft:   #ECE6F5;
    --pa-line-deep:   #D9CCEF;
    --pa-ink:         #1B1530;
    --pa-ink-soft:    #4A3F66;
    --pa-ink-faint:   #8A7FA6;
    --pa-accent:      #5A2A8C;
    --pa-accent-soft: #6E56CF;
    --pa-accent-tint: #EFE7F8;
    --pa-success:     #10B981;
    --pa-mono:        'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
    --pa-display:     'Plus Jakarta Sans', -apple-system, system-ui, sans-serif;

    padding: 80px 0 96px;
    background:
        radial-gradient(120% 80% at 80% 0%, rgba(110, 86, 207, 0.08) 0%, transparent 55%),
        radial-gradient(100% 60% at 0% 100%, rgba(217, 117, 96, 0.04) 0%, transparent 50%),
        var(--pa-bg);
}

.pa-section__container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3rem;
}

.pa-section__head { margin-bottom: 2.5rem; }

.pa-section__label {
    font-family: var(--pa-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pa-ink-faint);
    margin-bottom: 1.25rem;
    display: block;
}

.pa-section__headline {
    font-family: var(--pa-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 300;
    color: var(--pa-ink);
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin: 0 0 1rem 0;
    max-width: 820px;
    position: relative;
    display: inline-block;
}

.pa-section__headline::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--neural-purple, #3c1361), var(--neural-orange, #d97706));
    margin-top: 0.875rem;
}

.pa-section__sub {
    font-family: var(--pa-display);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--pa-ink-soft);
    max-width: 720px;
    margin: 1rem 0 0;
}

/* ── Shell ──────────────────────────────────────────────── */
.pa-shell {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    position: relative;
    padding: 24px;
    border-radius: 24px;
    background: var(--pa-bg-card);
    border: 1px solid var(--pa-line);
    box-shadow:
        0 1px 2px rgba(60, 19, 97, 0.04),
        0 20px 60px -30px rgba(60, 19, 97, 0.18);
    overflow: hidden;
}

/* ── Diagram ────────────────────────────────────────────── */
.pa-diag {
    position: relative;
    width: 100%;
    aspect-ratio: 1200 / 580;
    font-family: var(--pa-display);
    color: var(--pa-ink);
    container-type: inline-size;
    container-name: padiag;
}

/* Connectors */
.pa-connectors {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.pa-connectors .pa-conn {
    fill: none;
    stroke: var(--pa-line-deep);
    stroke-width: 1.2;
    stroke-linecap: round;
}

.pa-connectors .pa-conn--soft {
    stroke: var(--pa-line);
    stroke-dasharray: 2 5;
}

.pa-connectors .pa-conn--flow {
    stroke: var(--pa-accent-soft);
    stroke-dasharray: 4 8;
    animation: pa-flow 4s linear infinite;
}

@keyframes pa-flow { to { stroke-dashoffset: -40; } }

/* Account boundary */
.pa-bound {
    position: absolute;
    inset: 4px;
    border: 1px dashed var(--pa-line);
    border-radius: 18px;
    pointer-events: none;
}

.pa-bound__label {
    position: absolute;
    top: -0.55cqi;
    left: 2cqi;
    background: var(--pa-bg-card);
    padding: 0 0.6cqi;
    font-family: var(--pa-mono);
    font-size: 0.85cqi;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    color: var(--pa-ink-faint);
}

/* Card base */
.pa-user,
.pa-agent,
.pa-steps,
.pa-log {
    position: absolute;
    background: var(--pa-bg-card);
    border: 1px solid var(--pa-line);
    border-radius: 1cqi;
}

/* ── USER CARD ───────────────────────────── */
.pa-user {
    left: 3%;
    top: 25%;
    width: 22%;
    padding: 1.2cqi 1.3cqi 1cqi;
}

.pa-user__row {
    display: flex;
    align-items: center;
    gap: 0.8cqi;
    margin-bottom: 0.9cqi;
}

.pa-user__avatar {
    width: 2.5cqi; height: 2.5cqi;
    border-radius: 999px;
    background: var(--pa-accent-tint);
    border: 1px solid var(--pa-line-deep);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--pa-display);
    font-weight: 500;
    font-size: 0.95cqi;
    color: var(--pa-accent);
}

.pa-user__name {
    font-family: var(--pa-display);
    font-weight: 500;
    font-size: 1.1cqi;
    color: var(--pa-ink);
    line-height: 1.2;
}

.pa-user__time {
    font-family: var(--pa-mono);
    font-size: 0.78cqi;
    letter-spacing: 0.4px;
    color: var(--pa-ink-faint);
    margin-top: 0.15cqi;
}

.pa-user__msg {
    font-size: 1.05cqi;
    line-height: 1.5;
    color: var(--pa-ink);
    margin: 0 0 1cqi;
}

.pa-user__foot {
    display: flex;
    align-items: center;
    gap: 0.6cqi;
    padding-top: 0.8cqi;
    border-top: 1px dashed var(--pa-line-soft);
    font-family: var(--pa-mono);
    font-size: 0.78cqi;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--pa-ink-faint);
}

.pa-dot {
    width: 0.55cqi; height: 0.55cqi;
    border-radius: 999px;
    background: var(--pa-line-deep);
    display: inline-block;
}

.pa-dot--live {
    background: var(--pa-success);
    box-shadow: 0 0 0 0.25cqi rgba(16, 185, 129, 0.15);
    animation: pa-dot-pulse 2.4s ease-in-out infinite;
}

@keyframes pa-dot-pulse {
    0%, 100% { box-shadow: 0 0 0 0.25cqi rgba(16, 185, 129, 0.15); }
    50%      { box-shadow: 0 0 0 0.55cqi rgba(16, 185, 129, 0.04); }
}

/* ── AGENT WORKSPACE ─────────────────────── */
.pa-agent {
    left: 30%;
    top: 5%;
    width: 50%;
    height: 90%;
    display: flex;
    flex-direction: column;
    background: var(--pa-bg-card);
    border: 1px solid var(--pa-accent-soft);
    box-shadow:
        0 0 0 0.35cqi rgba(110, 86, 207, 0.06),
        0 24px 50px -28px rgba(60, 19, 97, 0.22);
    overflow: hidden;
}

.pa-agent__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1cqi 1.5cqi;
    border-bottom: 1px solid var(--pa-line);
    background: #FBFAFE;
}

.pa-agent__title {
    font-family: var(--pa-mono);
    font-size: 0.85cqi;
    letter-spacing: 1.6px;
    text-transform: uppercase;
    color: var(--pa-ink-faint);
}

.pa-agent__status {
    display: inline-flex;
    align-items: center;
    gap: 0.7cqi;
    font-family: var(--pa-mono);
    font-size: 0.85cqi;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--pa-ink);
}

.pa-pulse {
    width: 0.7cqi; height: 0.7cqi;
    border-radius: 999px;
    position: relative;
}

.pa-pulse--think { background: var(--pa-accent-soft); }
.pa-pulse--act   { background: var(--pa-success); }

.pa-pulse::after {
    content: '';
    position: absolute;
    inset: -0.25cqi;
    border-radius: 999px;
    border: 1px solid currentColor;
    opacity: 0.4;
    animation: pa-ring 2.2s ease-out infinite;
}

.pa-pulse--think::after { border-color: var(--pa-accent-soft); }
.pa-pulse--act::after   { border-color: var(--pa-success); }

@keyframes pa-ring {
    0%   { transform: scale(0.4); opacity: 0.9; }
    100% { transform: scale(2.1); opacity: 0; }
}

.pa-agent__body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.9cqi;
    padding: 1.2cqi 1.5cqi;
    overflow: hidden;
}

.pa-block__label {
    font-family: var(--pa-mono);
    font-size: 0.78cqi;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--pa-ink-faint);
    margin-bottom: 0.5cqi;
}

.pa-block ul { list-style: none; margin: 0; padding: 0; }

/* Reasoning */
.pa-reasoning .pa-reason {
    display: flex;
    align-items: center;
    gap: 0.8cqi;
    padding: 0.2cqi 0;
    font-size: 1.0cqi;
    color: var(--pa-ink-faint);
    transition: color 0.3s;
}

.pa-reason__marker {
    width: 0.55cqi; height: 0.55cqi;
    border-radius: 999px;
    background: var(--pa-line-deep);
    flex-shrink: 0;
}

.pa-reason--past .pa-reason__marker { background: var(--pa-accent-soft); opacity: 0.5; }
.pa-reason--active { color: var(--pa-ink); }

.pa-reason--active .pa-reason__marker {
    background: var(--pa-accent);
    box-shadow: 0 0 0 0.25cqi rgba(90, 42, 140, 0.12);
    animation: pa-marker-pulse 1.6s ease-in-out infinite;
}

@keyframes pa-marker-pulse {
    0%, 100% { box-shadow: 0 0 0 0.25cqi rgba(90, 42, 140, 0.12); }
    50%      { box-shadow: 0 0 0 0.45cqi rgba(90, 42, 140, 0.04); }
}

/* Tool calls */
.pa-tools .pa-tool {
    display: grid;
    grid-template-columns: 1.4cqi auto 1fr;
    gap: 0.7cqi;
    align-items: center;
    padding: 0.25cqi 0;
    font-family: var(--pa-mono);
    font-size: 0.92cqi;
    color: var(--pa-ink-faint);
    opacity: 0.5;
}

.pa-tools .pa-tool--run,
.pa-tools .pa-tool--done { opacity: 1; }

.pa-tool__name { color: var(--pa-ink); }

.pa-tools .pa-tool--done .pa-tool__name { color: var(--pa-ink-soft); }

.pa-tool__arg {
    color: var(--pa-ink-faint);
    font-size: 0.82cqi;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pa-tool__status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.pa-bullet {
    width: 0.55cqi; height: 0.55cqi;
    border-radius: 999px;
    background: var(--pa-line-deep);
}

.pa-check {
    color: var(--pa-success);
    font-size: 1.1cqi;
    line-height: 1;
}

.pa-spinner {
    width: 0.95cqi; height: 0.95cqi;
    border-radius: 999px;
    border: 0.18cqi solid var(--pa-accent-tint);
    border-top-color: var(--pa-accent);
    animation: pa-spin 0.85s linear infinite;
}

@keyframes pa-spin { to { transform: rotate(360deg); } }

/* Response */
.pa-response {
    border-top: 1px dashed var(--pa-line-soft);
    padding-top: 0.9cqi;
    margin-top: auto;
}

.pa-response__body {
    font-size: 1.05cqi;
    line-height: 1.55;
    color: var(--pa-ink);
    min-height: 3em;
}

.pa-response__line { min-height: 1.55em; }

.pa-caret {
    display: inline-block;
    width: 0.55cqi;
    height: 1em;
    vertical-align: -2px;
    margin-left: 1px;
    background: var(--pa-accent);
    animation: pa-caret 1s steps(2, start) infinite;
}

@keyframes pa-caret {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

.pa-response__foot {
    margin-top: 0.7cqi;
    display: inline-flex;
    align-items: center;
    gap: 0.5cqi;
    padding: 0.35cqi 0.9cqi;
    background: rgba(16, 185, 129, 0.10);
    border-radius: 999px;
    font-family: var(--pa-mono);
    font-size: 0.82cqi;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: #047857;
}

.pa-response__foot .pa-check { color: #047857; font-size: 0.9cqi; }

/* Credits footer */
.pa-agent__footer {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.9cqi;
    padding: 0.9cqi 1.5cqi;
    border-top: 1px solid var(--pa-line);
    background: #FBFAFE;
    font-family: var(--pa-mono);
    font-size: 0.82cqi;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--pa-ink-faint);
}

.pa-credits__bar {
    height: 0.45cqi;
    background: var(--pa-accent-tint);
    border-radius: 0.25cqi;
    overflow: hidden;
}

.pa-credits__fill {
    display: block;
    height: 100%;
    background: var(--pa-accent);
    transition: width 0.25s ease-out;
}

.pa-credits__pct { color: var(--pa-ink); }

/* ── WORKFLOW STEPS ──────────────────────── */
.pa-steps {
    right: 3%;
    top: 5%;
    width: 16%;
    padding: 1.2cqi 1.2cqi 1cqi;
}

.pa-steps .pa-block__label { margin-bottom: 0.7cqi; }

.pa-step {
    display: flex;
    align-items: center;
    gap: 0.8cqi;
    padding: 0.5cqi 0;
    font-size: 1.0cqi;
    color: var(--pa-ink-faint);
}

.pa-step__dot {
    width: 1.2cqi; height: 1.2cqi;
    border-radius: 999px;
    border: 0.12cqi solid var(--pa-line-deep);
    background: var(--pa-bg-card);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
}

.pa-step--done .pa-step__dot {
    border-color: var(--pa-success);
    background: rgba(16, 185, 129, 0.10);
}

.pa-step--done .pa-step__dot .pa-check { font-size: 1cqi; }
.pa-step--done .pa-step__label { color: var(--pa-ink-soft); }
.pa-step--active .pa-step__dot { border-color: var(--pa-accent); }

.pa-step--active .pa-step__label {
    color: var(--pa-ink);
    font-weight: 500;
}

.pa-step--active .pa-step__dot::before {
    content: '';
    width: 0.5cqi; height: 0.5cqi;
    border-radius: 999px;
    background: var(--pa-accent);
}

.pa-step__ring {
    position: absolute;
    inset: -0.2cqi;
    border-radius: 999px;
    border: 0.12cqi solid var(--pa-accent);
    animation: pa-step-ring 1.6s ease-out infinite;
}

@keyframes pa-step-ring {
    0%   { transform: scale(1);   opacity: 0.8; }
    100% { transform: scale(1.9); opacity: 0; }
}

/* ── ACTIVITY LOG ────────────────────────── */
.pa-log {
    right: 3%;
    bottom: 5%;
    width: 16%;
    padding: 1cqi 1.2cqi;
}

.pa-log ul { list-style: none; margin: 0; padding: 0; }

.pa-log__row {
    display: grid;
    grid-template-columns: 2.6cqi 1fr;
    gap: 0.6cqi;
    align-items: baseline;
    padding: 0.25cqi 0;
    font-size: 0.92cqi;
    color: var(--pa-ink-faint);
    opacity: 0;
    transform: translateY(0.3cqi);
    transition: opacity 0.35s ease-out, transform 0.35s ease-out;
}

.pa-log__row--in { opacity: 1; transform: translateY(0); }
.pa-log__row--fresh .pa-log__text { color: var(--pa-ink); }

.pa-log__time {
    font-family: var(--pa-mono);
    font-size: 0.82cqi;
    letter-spacing: 0.4px;
    color: var(--pa-ink-faint);
}

/* ── Responsive ──────────────────────────── */
@media (max-width: 880px) {
    .pa-section { padding: 56px 0 72px; }
    .pa-section__container { padding: 0 1.5rem; }
    .pa-shell { padding: 12px; border-radius: 16px; }
    /* On narrow screens the diagram becomes too cramped — drop it to a
       simplified message + cap fall back; native cqi shrinking handles
       most of it but small phones get an absolute-position headache. */
}

@media (prefers-reduced-motion: reduce) {
    .pa-conn--flow,
    .pa-pulse::after,
    .pa-dot--live,
    .pa-reason--active .pa-reason__marker,
    .pa-spinner,
    .pa-step__ring,
    .pa-caret {
        animation: none !important;
    }
}