/* ==================== PERSONAL AI PLATFORM STYLES ==================== */
/* Black background, blue (#4466BB) accent, white text, dark gray cards */
/* Personal AI is the consciousness preservation platform */
/* Train Your Twin. Live Forever. */
/* THE CORE OF SOCIALETERNITY - Why SE exists */
/* User OWNS their Twin. All activity feeds Spark Box (UCSS). */
/* AI output is ALWAYS labeled as AI-Generated */

:root {
    /* Personal AI Platform Colors - WHITE/SILVER */
    /* Maps to SE theme variables for dark/light mode support */
    --pai-primary: var(--se-accent, #E8E8E8);
    --pai-primary-hover: var(--se-accent-hover, #D0D0D0);
    --pai-primary-light: rgba(232, 232, 232, 0.15);
    --pai-primary-dark: #CCCCCC;
    --pai-success: #22c55e;
    --pai-warning: #f97316;
    --pai-error: #ef4444;
    --pai-info: #38bdf8;

    /* Spark Progress Colors */
    --pai-spark-low: #ef4444;
    --pai-spark-medium: #f97316;
    --pai-spark-good: #eab308;
    --pai-spark-high: #22c55e;
    --pai-spark-complete: #4466BB;

    /* Personal AI Backgrounds - Maps to SE theme */
    --pai-bg: var(--se-bg, #000000);
    --pai-bg-section: var(--se-bg-elevated, #0a0a0a);
    --pai-bg-card: var(--se-bg-card, #1a1a1a);
    --pai-bg-card-hover: var(--se-bg-elevated, #222222);
    --pai-bg-input: var(--se-bg-input, #141414);
    --pai-bg-overlay: var(--se-bg-overlay, rgba(0, 0, 0, 0.8));

    /* Personal AI Text - Maps to SE theme */
    --pai-text: var(--se-text, #E8E8E8);
    --pai-text-secondary: var(--se-text-secondary, #AAAAAA);
    --pai-text-muted: var(--se-text-muted, #666666);

    /* Personal AI Borders - Maps to SE theme */
    --pai-border: var(--se-border, rgba(232, 232, 232, 0.2));
    --pai-border-light: var(--se-border-card, rgba(255, 255, 255, 0.1));
    --pai-border-focus: rgba(232, 232, 232, 0.5);
}

/* Personal AI Header Voice Buttons - proper spacing after CTA */
.pai-page .pai-header .voice-toggle,
.pai-page .pai-header #ttsToggle,
.pai-page .pai-header #voiceToggle {
    position: relative !important;
    top: auto !important;
    right: auto !important;
    margin-left: 0.5rem;
}

.pai-header-content {
    gap: 1rem;
}

.pai-nav {
    margin-right: auto;
}

/* ==================== BASE LAYOUT ==================== */
.pai-page {
    background: var(--pai-bg);
    min-height: 100vh;
    color: var(--pai-text);
    font-family: 'Raleway', sans-serif;
}

.pai-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.pai-container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

.pai-content {
    padding-top: 80px;
    padding-bottom: 60px;
}

.pai-grid-2 {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1.5rem;
}

.pai-grid-3 {
    display: grid;
    grid-template-columns: 280px 1fr 300px;
    gap: 1.5rem;
}

/* ==================== HEADER ==================== */
.pai-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--pai-border-light);
    z-index: 1000;
    padding: 0.75rem 1rem;
}

.pai-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
}

.pai-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--pai-primary);
    text-decoration: none;
}

.pai-logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--pai-primary) 0%, var(--pai-primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.pai-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pai-nav-link {
    padding: 0.5rem 1rem;
    color: var(--pai-text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.pai-nav-link:hover,
.pai-nav-link.active {
    color: var(--pai-text);
    background: var(--pai-primary-light);
}

.pai-nav-cta {
    padding: 0.5rem 1rem;
    background: var(--pai-primary);
    color: #0a0a0a;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.2s ease;
    margin-left: 0.5rem;
}

.pai-nav-cta:hover {
    background: var(--pai-primary-hover);
    transform: translateY(-1px);
}

/* ==================== CARDS ==================== */
.pai-card {
    background: var(--pai-bg-card);
    border: 1px solid var(--pai-border-light);
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.2s ease;
}

.pai-card:hover {
    background: var(--pai-bg-card-hover);
}

.pai-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--pai-border-light);
}

.pai-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--pai-text);
}

.pai-card-subtitle {
    font-size: 0.875rem;
    color: var(--pai-text-secondary);
    margin-top: 0.25rem;
}

/* ==================== BUTTONS ==================== */
.pai-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

.pai-btn-primary {
    background: linear-gradient(135deg, var(--pai-primary) 0%, var(--pai-primary-dark) 100%);
    color: #0a0a0a;
}

.pai-btn-primary:hover {
    background: linear-gradient(135deg, var(--pai-primary-hover) 0%, var(--pai-primary-dark) 100%);
    transform: translateY(-1px);
}

.pai-btn-secondary {
    background: var(--pai-bg-input);
    color: var(--pai-text);
    border: 1px solid var(--pai-border-light);
}

.pai-btn-secondary:hover {
    background: var(--pai-bg-card-hover);
    border-color: var(--pai-primary);
}

.pai-btn-outline {
    background: transparent;
    color: var(--pai-primary);
    border: 2px solid var(--pai-primary);
}

.pai-btn-outline:hover {
    background: var(--pai-primary-light);
}

.pai-btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.8125rem;
}

.pai-btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.pai-btn-block {
    width: 100%;
}

/* ==================== FORMS ==================== */
.pai-form-group {
    margin-bottom: 1.5rem;
}

.pai-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--pai-text-secondary);
    margin-bottom: 0.5rem;
}

.pai-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--pai-bg-input);
    border: 1px solid var(--pai-border-light);
    border-radius: 12px;
    color: var(--pai-text);
    font-size: 0.9375rem;
    transition: all 0.2s ease;
}

.pai-input:focus {
    outline: none;
    border-color: var(--pai-primary);
    box-shadow: 0 0 0 3px var(--pai-primary-light);
}

.pai-textarea {
    min-height: 120px;
    resize: vertical;
}

/* ==================== SPARK COMPLETENESS ==================== */
.pai-spark-container {
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(232, 232, 232, 0.1) 0%, rgba(232, 232, 232, 0.05) 100%);
    border: 1px solid var(--pai-border);
    border-radius: 16px;
}

.pai-spark-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.pai-spark-score {
    font-size: 3rem;
    font-weight: 700;
    color: var(--pai-primary);
}

.pai-spark-label {
    font-size: 0.875rem;
    color: var(--pai-text-secondary);
}

.pai-spark-bar {
    height: 12px;
    background: var(--pai-bg-input);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.pai-spark-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--pai-primary-dark) 0%, var(--pai-primary) 100%);
    border-radius: 6px;
    transition: width 0.5s ease;
}

.pai-spark-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
}

.pai-spark-category {
    padding: 0.75rem;
    background: var(--pai-bg-card);
    border-radius: 8px;
    text-align: center;
}

.pai-spark-category-name {
    font-size: 0.75rem;
    color: var(--pai-text-secondary);
    margin-bottom: 0.25rem;
}

.pai-spark-category-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--pai-text);
}

/* ==================== TRAINING SESSION ==================== */
.pai-session-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 160px);
    background: var(--pai-bg-section);
    border-radius: 16px;
    overflow: hidden;
}

.pai-session-header {
    padding: 1rem 1.5rem;
    background: var(--pai-bg-card);
    border-bottom: 1px solid var(--pai-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pai-session-type {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    background: var(--pai-primary-light);
    color: var(--pai-primary);
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
}

.pai-session-timer {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--pai-primary);
    font-variant-numeric: tabular-nums;
}

.pai-session-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

.pai-message {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    max-width: 85%;
}

.pai-message.user {
    margin-left: auto;
    flex-direction: row-reverse;
}

.pai-message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--pai-bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.pai-message.twin .pai-message-avatar {
    background: var(--pai-primary);
}

.pai-message-content {
    padding: 1rem 1.25rem;
    background: var(--pai-bg-card);
    border-radius: 16px;
    border-bottom-left-radius: 4px;
}

.pai-message.user .pai-message-content {
    background: var(--pai-primary);
    color: #0a0a0a;
    border-bottom-left-radius: 16px;
    border-bottom-right-radius: 4px;
}

.pai-message-label {
    font-size: 0.6875rem;
    color: var(--pai-text-muted);
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.pai-session-input {
    padding: 1rem 1.5rem;
    background: var(--pai-bg-card);
    border-top: 1px solid var(--pai-border-light);
}

.pai-session-input-wrapper {
    display: flex;
    gap: 0.75rem;
    align-items: flex-end;
}

.pai-session-textarea {
    flex: 1;
    min-height: 48px;
    max-height: 150px;
    padding: 0.875rem 1rem;
    background: var(--pai-bg-input);
    border: 1px solid var(--pai-border-light);
    border-radius: 24px;
    color: var(--pai-text);
    resize: none;
}

/* ==================== MILESTONES ==================== */
.pai-milestone {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--pai-bg-card);
    border-radius: 12px;
    margin-bottom: 0.75rem;
}

.pai-milestone.achieved {
    background: linear-gradient(135deg, rgba(232, 232, 232, 0.15) 0%, rgba(232, 232, 232, 0.05) 100%);
    border: 1px solid var(--pai-border);
}

.pai-milestone-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--pai-bg-input);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.pai-milestone.achieved .pai-milestone-icon {
    background: var(--pai-primary);
}

.pai-milestone-info {
    flex: 1;
}

.pai-milestone-title {
    font-weight: 600;
    color: var(--pai-text);
    margin-bottom: 0.25rem;
}

.pai-milestone-desc {
    font-size: 0.8125rem;
    color: var(--pai-text-secondary);
}

.pai-milestone-date {
    font-size: 0.75rem;
    color: var(--pai-text-muted);
}

/* ==================== PROGRESS ==================== */
.pai-progress-ring {
    position: relative;
    width: 120px;
    height: 120px;
}

.pai-progress-ring svg {
    transform: rotate(-90deg);
}

.pai-progress-ring-bg {
    fill: none;
    stroke: var(--pai-bg-input);
    stroke-width: 8;
}

.pai-progress-ring-fill {
    fill: none;
    stroke: var(--pai-primary);
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.5s ease;
}

.pai-progress-ring-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--pai-text);
}

.pai-streak-display {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    border-radius: 12px;
    color: white;
    font-weight: 600;
}

.pai-streak-flame {
    font-size: 1.25rem;
}

/* ==================== TOPIC COVERAGE ==================== */
.pai-topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.pai-topic-card {
    padding: 1rem;
    background: var(--pai-bg-card);
    border: 1px solid var(--pai-border-light);
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pai-topic-card:hover {
    border-color: var(--pai-primary);
    transform: translateY(-2px);
}

.pai-topic-card.explored {
    background: linear-gradient(135deg, rgba(232, 232, 232, 0.15) 0%, rgba(232, 232, 232, 0.05) 100%);
    border-color: var(--pai-border);
}

.pai-topic-icon {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.pai-topic-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--pai-text);
    margin-bottom: 0.25rem;
}

.pai-topic-coverage {
    font-size: 0.75rem;
    color: var(--pai-text-secondary);
}

/* ==================== QUESTIONNAIRES ==================== */
.pai-questionnaire-card {
    padding: 1.5rem;
    background: var(--pai-bg-card);
    border: 1px solid var(--pai-border-light);
    border-radius: 16px;
    margin-bottom: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pai-questionnaire-card:hover {
    border-color: var(--pai-primary);
}

.pai-questionnaire-card.completed {
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.15) 0%, rgba(34, 197, 94, 0.05) 100%);
    border-color: var(--pai-success);
}

.pai-questionnaire-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.pai-questionnaire-title {
    font-weight: 600;
    color: var(--pai-text);
}

.pai-questionnaire-badge {
    padding: 0.25rem 0.75rem;
    background: var(--pai-primary-light);
    color: var(--pai-primary);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pai-questionnaire-badge.done {
    background: rgba(34, 197, 94, 0.15);
    color: var(--pai-success);
}

.pai-questionnaire-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--pai-text-secondary);
}

/* ==================== VOICE/AVATAR STATUS ==================== */
.pai-media-status {
    padding: 1.5rem;
    background: var(--pai-bg-card);
    border: 1px solid var(--pai-border-light);
    border-radius: 16px;
}

.pai-media-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.pai-media-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--pai-bg-input);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.pai-media-icon.ready {
    background: var(--pai-primary);
}

.pai-media-info h3 {
    font-weight: 600;
    color: var(--pai-text);
    margin-bottom: 0.25rem;
}

.pai-media-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pai-media-status-badge.not-started {
    background: var(--pai-bg-input);
    color: var(--pai-text-muted);
}

.pai-media-status-badge.consent-given {
    background: rgba(234, 179, 8, 0.15);
    color: #eab308;
}

.pai-media-status-badge.training {
    background: var(--pai-primary-light);
    color: var(--pai-primary);
}

.pai-media-status-badge.ready {
    background: rgba(34, 197, 94, 0.15);
    color: var(--pai-success);
}

/* ==================== VISITORS ==================== */
.pai-visitor-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--pai-bg-card);
    border-radius: 12px;
    margin-bottom: 0.75rem;
}

.pai-visitor-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--pai-bg-input);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.pai-visitor-info {
    flex: 1;
}

.pai-visitor-name {
    font-weight: 600;
    color: var(--pai-text);
}

.pai-visitor-meta {
    font-size: 0.8125rem;
    color: var(--pai-text-secondary);
}

.pai-visitor-rating {
    display: flex;
    gap: 0.125rem;
    color: #eab308;
}

/* ==================== CONSENT ==================== */
.pai-consent-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--pai-bg-card);
    border: 1px solid var(--pai-border-light);
    border-radius: 12px;
    margin-bottom: 0.75rem;
}

.pai-consent-info {
    flex: 1;
    margin-right: 1rem;
}

.pai-consent-title {
    font-weight: 600;
    color: var(--pai-text);
    margin-bottom: 0.25rem;
}

.pai-consent-desc {
    font-size: 0.8125rem;
    color: var(--pai-text-secondary);
}

.pai-consent-toggle {
    position: relative;
    width: 48px;
    height: 28px;
}

.pai-consent-toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.pai-consent-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--pai-bg-input);
    border-radius: 28px;
    transition: 0.3s;
}

.pai-consent-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    border-radius: 50%;
    transition: 0.3s;
}

.pai-consent-toggle input:checked + .pai-consent-slider {
    background-color: var(--pai-primary);
}

.pai-consent-toggle input:checked + .pai-consent-slider:before {
    transform: translateX(20px);
}

/* ==================== ECHO MODE ==================== */
.pai-echo-container {
    background: linear-gradient(135deg, rgba(232, 232, 232, 0.1) 0%, rgba(0, 0, 0, 0.9) 100%);
    border: 1px solid var(--pai-border);
    border-radius: 16px;
    overflow: hidden;
}

.pai-echo-header {
    padding: 1rem 1.5rem;
    background: rgba(232, 232, 232, 0.1);
    border-bottom: 1px solid var(--pai-border);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.pai-echo-twin-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--pai-primary) 0%, var(--pai-primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.pai-echo-twin-info h3 {
    font-weight: 600;
    color: var(--pai-text);
}

.pai-echo-twin-info p {
    font-size: 0.8125rem;
    color: var(--pai-text-secondary);
}

/* ==================== AI GENERATED NOTICE ==================== */
.pai-ai-notice {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: rgba(232, 232, 232, 0.1);
    border: 1px solid var(--pai-border);
    border-radius: 8px;
    font-size: 0.75rem;
    color: var(--pai-text-secondary);
}

.pai-ai-notice-icon {
    color: var(--pai-primary);
}

/* ==================== LANDING PAGE ==================== */
.pai-landing-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
    background: radial-gradient(ellipse at top, rgba(232, 232, 232, 0.1) 0%, transparent 50%),
                var(--pai-bg);
}

.pai-landing-tagline {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--pai-text);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.pai-landing-tagline span {
    color: var(--pai-primary);
}

.pai-landing-subtitle {
    font-size: clamp(1rem, 2vw, 1.5rem);
    color: var(--pai-text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.pai-landing-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    font-size: 1.125rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--pai-primary) 0%, var(--pai-primary-dark) 100%);
    color: #0a0a0a;
    border: none;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.pai-landing-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(232, 232, 232, 0.3);
}

/* ==================== MATURITY STATUS ==================== */
.pai-maturity-display {
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(232, 232, 232, 0.1) 0%, var(--pai-bg-card) 100%);
    border: 1px solid var(--pai-border);
    border-radius: 16px;
    text-align: center;
}

.pai-maturity-label {
    font-size: 0.875rem;
    color: var(--pai-text-secondary);
    margin-bottom: 0.5rem;
}

.pai-maturity-status {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--pai-primary);
    margin-bottom: 0.5rem;
}

.pai-maturity-hours {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--pai-text);
    margin-bottom: 0.25rem;
}

.pai-maturity-goal {
    font-size: 0.875rem;
    color: var(--pai-text-muted);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .pai-grid-3 {
        grid-template-columns: 1fr;
    }

    .pai-grid-2 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .pai-content {
        padding-top: 70px;
        padding-bottom: 80px;
    }

    .pai-card {
        padding: 1rem;
        border-radius: 12px;
    }

    .pai-session-container {
        height: calc(100vh - 140px);
    }

    .pai-message {
        max-width: 90%;
    }

    .pai-topics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pai-spark-categories {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .pai-nav {
        display: none;
    }

    .pai-landing-tagline {
        font-size: 1.75rem;
    }

    .pai-topics-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== ANIMATIONS ==================== */
@keyframes pai-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.pai-pulse {
    animation: pai-pulse 2s infinite;
}

@keyframes pai-fade-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.pai-fade-in {
    animation: pai-fade-in 0.3s ease;
}

@keyframes pai-slide-up {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.pai-slide-up {
    animation: pai-slide-up 0.3s ease;
}