/**
 * 決まり字変化シミュレーター スタイル
 * 百人一首.jp
 * プレフィックス: sim-
 *
 * Design: "Analytical Observatory"
 * — Dark instrument panels meet traditional calligraphy.
 * — Six kimariji-length colors form a spectral data language.
 * — Calm, precise, data-rich.
 */

/* ============================
   Simulator Variables
   ============================ */
:root {
    --sim-ki-1: #FF3B30;
    --sim-ki-2: #FF9500;
    --sim-ki-3: #FFD60A;
    --sim-ki-4: #34C759;
    --sim-ki-5: #5AC8FA;
    --sim-ki-6: #0071E3;

    --sim-ki-1-soft: rgba(255, 59, 48, 0.12);
    --sim-ki-2-soft: rgba(255, 149, 0, 0.12);
    --sim-ki-3-soft: rgba(255, 214, 10, 0.12);
    --sim-ki-4-soft: rgba(52, 199, 89, 0.12);
    --sim-ki-5-soft: rgba(90, 200, 250, 0.12);
    --sim-ki-6-soft: rgba(0, 113, 227, 0.12);

    --sim-dark-bg: #1A1A1E;
    --sim-dark-surface: #2C2C30;
    --sim-dark-border: #3A3A3E;
    --sim-dark-text: #F5F5F7;
    --sim-dark-text-dim: #98989D;

    --sim-green-glow: rgba(52, 199, 89, 0.5);
    --sim-panel-shadow: 0 8px 32px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
}

/* ============================
   Container
   ============================ */
.sim-container {
    max-width: 720px;
    margin: 0 auto;
}

/* ============================
   Page Header
   ============================ */
.sim-page-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.sim-page-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 4vw, var(--text-3xl));
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-2);
}

.sim-page-subtitle {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================
   Mode Selection
   ============================ */
.sim-mode-select {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-5);
    max-width: 600px;
    margin: 0 auto;
}

.sim-mode-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: var(--color-bg-primary);
    border: 1.5px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-10) var(--space-6) var(--space-8);
    cursor: pointer;
    transition: transform var(--duration-normal) var(--ease-default),
                box-shadow var(--duration-normal) var(--ease-default),
                border-color var(--duration-normal) var(--ease-default);
    overflow: hidden;
}

.sim-mode-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--sim-ki-1), var(--sim-ki-2), var(--sim-ki-3), var(--sim-ki-4), var(--sim-ki-5), var(--sim-ki-6));
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-default);
}

.sim-mode-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.04);
    border-color: var(--color-accent-primary);
}

.sim-mode-card:hover::before {
    opacity: 1;
}

.sim-mode-card:active {
    transform: translateY(-2px);
}

.sim-mode-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    font-size: 1.5rem;
}

.sim-mode-icon--board {
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.08), rgba(90, 200, 250, 0.08));
    color: var(--color-accent-primary);
}

.sim-mode-icon--ref {
    background: linear-gradient(135deg, rgba(172, 142, 104, 0.1), rgba(255, 214, 10, 0.08));
    color: var(--color-poetry-accent);
}

.sim-mode-title {
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.sim-mode-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ============================
   Section Header (sim panels)
   ============================ */
.sim-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
}

.sim-header-title {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
}

.sim-header-actions {
    display: flex;
    gap: var(--space-2);
}

/* ============================
   Statistics Dashboard
   ============================ */
.sim-stats-panel {
    background: var(--sim-dark-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-5) var(--space-6);
    margin-bottom: var(--space-5);
    position: relative;
    overflow: hidden;
}

.sim-stats-panel::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 20% 0%, rgba(90, 200, 250, 0.04) 0%, transparent 60%),
                radial-gradient(ellipse at 80% 100%, rgba(0, 113, 227, 0.03) 0%, transparent 60%);
    pointer-events: none;
}

.sim-stats-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-4);
    position: relative;
    z-index: 1;
}

.sim-stats-label {
    font-size: var(--text-sm);
    color: var(--sim-dark-text-dim);
}

.sim-stats-label strong {
    color: var(--sim-dark-text);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--text-lg);
}

/* Bar Chart */
.sim-chart {
    display: flex;
    align-items: flex-end;
    gap: var(--space-3);
    height: 80px;
    position: relative;
    z-index: 1;
}

.sim-chart-bar {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    height: 100%;
    justify-content: flex-end;
}

.sim-chart-fill {
    width: 100%;
    max-width: 36px;
    min-height: 2px;
    border-radius: 3px 3px 0 0;
    transition: height 0.5s var(--ease-default);
    position: relative;
}

.sim-chart-fill[data-ki="1"] { background: var(--sim-ki-1); }
.sim-chart-fill[data-ki="2"] { background: var(--sim-ki-2); }
.sim-chart-fill[data-ki="3"] { background: var(--sim-ki-3); }
.sim-chart-fill[data-ki="4"] { background: var(--sim-ki-4); }
.sim-chart-fill[data-ki="5"] { background: var(--sim-ki-5); }
.sim-chart-fill[data-ki="6"] { background: var(--sim-ki-6); }

.sim-chart-count {
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--sim-dark-text);
    min-height: 16px;
}

.sim-chart-label {
    font-size: 10px;
    color: var(--sim-dark-text-dim);
    letter-spacing: 0.02em;
    white-space: nowrap;
}

/* Probability Display */
.sim-prob-display {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--sim-dark-surface);
    border-radius: var(--radius-md);
    margin-top: var(--space-4);
    position: relative;
    z-index: 1;
}

.sim-prob-label {
    font-size: var(--text-xs);
    color: var(--sim-dark-text-dim);
    flex-shrink: 0;
}

.sim-prob-bar {
    flex: 1;
    height: 6px;
    background: var(--sim-dark-border);
    border-radius: 3px;
    overflow: hidden;
}

.sim-prob-fill {
    height: 100%;
    background: var(--sim-ki-5);
    border-radius: 3px;
    transition: width 0.4s var(--ease-default);
}

.sim-prob-value {
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--sim-dark-text);
    min-width: 36px;
    text-align: right;
}

/* ============================
   Board View
   ============================ */
.sim-board {
    max-width: 100%;
    margin: 0 auto var(--space-5);
}

.sim-territory {
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-1);
}

.sim-territory--enemy {
    border: 1.5px dashed var(--color-border);
    background: var(--color-bg-secondary);
}

.sim-territory--self {
    border: 1.5px solid var(--color-accent-primary);
    background: rgba(0, 113, 227, 0.02);
}

.sim-territory-label {
    font-size: var(--text-xs);
    font-weight: 600;
    text-align: center;
    padding: var(--space-1) 0;
    margin-bottom: var(--space-1);
    color: var(--color-text-tertiary);
    letter-spacing: 0.04em;
}

.sim-board-gap {
    height: var(--space-3);
}

/* Card Rows */
.sim-row {
    display: flex;
    justify-content: center;
    gap: 3px;
    margin-bottom: 3px;
}

/* Card Tiles */
.sim-card {
    font-family: var(--font-mincho);
    font-size: 11px;
    line-height: 1.2;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    border: 1.5px solid var(--color-border);
    border-radius: 2px;
    width: 40px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    writing-mode: vertical-rl;
    cursor: pointer;
    padding: 2px 1px;
    position: relative;
    touch-action: manipulation;
    transition: transform 0.12s var(--ease-default),
                border-color var(--duration-fast) var(--ease-default),
                opacity 0.4s var(--ease-default),
                background var(--duration-fast) var(--ease-default),
                box-shadow var(--duration-fast) var(--ease-default);
}

.sim-card:hover:not(.is-removed):not(.is-disabled) {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 1px rgba(0, 113, 227, 0.15);
}

.sim-card:active:not(.is-removed):not(.is-disabled) {
    transform: scale(0.93);
}

/* Kimariji length indicator */
.sim-card::after {
    content: attr(data-ki-len);
    position: absolute;
    bottom: 1px;
    left: 50%;
    transform: translateX(-50%);
    font-family: var(--font-display);
    font-size: 7px;
    font-weight: 700;
    writing-mode: horizontal-tb;
    line-height: 1;
    width: 12px;
    height: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
    background: var(--color-bg-secondary);
    color: var(--color-text-tertiary);
}

/* Kimariji length color coding */
.sim-card[data-ki-len="1"] { border-left: 3px solid var(--sim-ki-1); }
.sim-card[data-ki-len="2"] { border-left: 3px solid var(--sim-ki-2); }
.sim-card[data-ki-len="3"] { border-left: 3px solid var(--sim-ki-3); }
.sim-card[data-ki-len="4"] { border-left: 3px solid var(--sim-ki-4); }
.sim-card[data-ki-len="5"] { border-left: 3px solid var(--sim-ki-5); }
.sim-card[data-ki-len="6"] { border-left: 3px solid var(--sim-ki-6); }

.sim-card[data-ki-len="1"]::after { background: var(--sim-ki-1-soft); color: var(--sim-ki-1); }
.sim-card[data-ki-len="2"]::after { background: var(--sim-ki-2-soft); color: var(--sim-ki-2); }
.sim-card[data-ki-len="3"]::after { background: var(--sim-ki-3-soft); color: var(--sim-ki-3); }
.sim-card[data-ki-len="4"]::after { background: var(--sim-ki-4-soft); color: var(--sim-ki-4); }
.sim-card[data-ki-len="5"]::after { background: var(--sim-ki-5-soft); color: var(--sim-ki-5); }
.sim-card[data-ki-len="6"]::after { background: var(--sim-ki-6-soft); color: var(--sim-ki-6); }

/* Card States */
.sim-card.is-selected {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.25);
    background: rgba(0, 113, 227, 0.04);
}

.sim-card.is-changed {
    animation: sim-kimariji-pulse 0.7s var(--ease-default);
}

.sim-card.is-removed {
    opacity: 0;
    transform: scale(0.7);
    pointer-events: none;
}

.sim-card.is-disabled {
    cursor: default;
    pointer-events: none;
}

/* ============================
   Card Detail Panel
   ============================ */
.sim-detail-panel {
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-5);
    box-shadow: var(--sim-panel-shadow);
    animation: sim-slide-up 0.3s var(--ease-default);
}

.sim-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-4);
}

.sim-detail-poem {
    font-family: var(--font-mincho);
    font-size: var(--text-lg);
    color: var(--color-text-primary);
    line-height: 1.8;
}

.sim-detail-poet {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-1);
}

.sim-detail-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    color: var(--color-text-tertiary);
    font-size: var(--text-lg);
    transition: background var(--duration-fast) var(--ease-default);
    flex-shrink: 0;
    margin-left: var(--space-4);
}

.sim-detail-close:hover {
    background: var(--color-border);
    color: var(--color-text-primary);
}

/* Kimariji Change Display */
.sim-detail-kimariji {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.sim-detail-ki-label {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    flex-shrink: 0;
}

.sim-ki-change {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-mincho);
}

.sim-ki-old {
    font-size: var(--text-base);
    color: var(--color-text-tertiary);
    text-decoration: line-through;
    text-decoration-color: var(--color-border);
}

.sim-ki-arrow {
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
}

.sim-ki-new {
    font-size: var(--text-lg);
    font-weight: 600;
    color: #34C759;
}

.sim-ki-same {
    font-size: var(--text-lg);
    color: var(--color-text-primary);
}

/* Detail Action */
.sim-detail-action {
    margin-top: var(--space-5);
}

.sim-btn-remove {
    width: 100%;
    padding: var(--space-3) var(--space-6);
    background: var(--color-text-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-default),
                transform var(--duration-fast) var(--ease-default);
    min-height: 44px;
}

.sim-btn-remove:hover {
    background: #000;
}

.sim-btn-remove:active {
    transform: scale(0.98);
}

/* ============================
   Friend Card Panel
   ============================ */
.sim-friend-panel {
    border-top: 1px solid var(--color-border-light);
    padding-top: var(--space-4);
    margin-top: var(--space-4);
}

.sim-friend-title {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-tertiary);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.sim-friend-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.sim-friend-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
}

.sim-friend-prefix {
    font-family: var(--font-mincho);
    color: var(--color-accent-primary);
    font-weight: 600;
    text-decoration: underline;
    text-decoration-color: rgba(0, 113, 227, 0.3);
    text-underline-offset: 3px;
}

.sim-friend-rest {
    font-family: var(--font-mincho);
    color: var(--color-text-secondary);
}

.sim-friend-badge {
    margin-left: auto;
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 4px;
    flex-shrink: 0;
}

/* ============================
   Change Log
   ============================ */
.sim-changelog-wrap {
    margin-bottom: var(--space-5);
}

.sim-changelog-wrap > summary {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: var(--space-3) 0;
    list-style: none;
    user-select: none;
}

.sim-changelog-wrap > summary::-webkit-details-marker {
    display: none;
}

.sim-changelog-wrap > summary::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-right: 2px solid var(--color-text-tertiary);
    border-bottom: 2px solid var(--color-text-tertiary);
    transform: rotate(-45deg);
    transition: transform var(--duration-fast) var(--ease-default);
    flex-shrink: 0;
}

.sim-changelog-wrap[open] > summary::before {
    transform: rotate(45deg);
}

.sim-changelog-count {
    font-family: var(--font-display);
    font-weight: 600;
    background: var(--color-bg-secondary);
    padding: 1px 8px;
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.sim-changelog {
    max-height: 280px;
    overflow-y: auto;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    background: var(--color-bg-primary);
}

.sim-changelog::-webkit-scrollbar {
    width: 4px;
}

.sim-changelog::-webkit-scrollbar-track {
    background: transparent;
}

.sim-changelog::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 2px;
}

.sim-changelog-entry {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
    font-size: var(--text-sm);
}

.sim-changelog-entry:last-child {
    border-bottom: none;
}

.sim-changelog-removed {
    font-family: var(--font-mincho);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.sim-changelog-removed .sim-changelog-territory {
    font-family: var(--font-text);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-tertiary);
    margin-left: var(--space-1);
}

.sim-changelog-changes {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding-left: var(--space-3);
}

.sim-changelog-change {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}

.sim-changelog-change .sim-ki-old {
    font-size: var(--text-xs);
}

.sim-changelog-change .sim-ki-new {
    font-size: var(--text-xs);
}

.sim-changelog-change .sim-ki-arrow {
    font-size: var(--text-xs);
}

.sim-changelog-empty {
    padding: var(--space-6);
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
}

/* ============================
   Reference Controls
   ============================ */
.sim-ref-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
    flex-wrap: wrap;
}

.sim-ref-actions {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.sim-ref-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-secondary);
    border: 1.5px solid transparent;
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
    min-height: 36px;
    white-space: nowrap;
}

.sim-ref-btn:hover {
    background: var(--color-border-light);
    color: var(--color-text-primary);
}

.sim-ref-btn:active {
    transform: scale(0.97);
}

.sim-ref-btn.is-active {
    border-color: var(--color-accent-primary);
    background: rgba(0, 113, 227, 0.06);
    color: var(--color-accent-primary);
}

.sim-ref-filters {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.sim-select {
    appearance: none;
    -webkit-appearance: none;
    padding: var(--space-2) var(--space-6) var(--space-2) var(--space-3);
    background: var(--color-bg-secondary) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2386868B'/%3E%3C/svg%3E") no-repeat right 10px center;
    border: 1.5px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    min-height: 36px;
    transition: border-color var(--duration-fast) var(--ease-default);
}

.sim-select:hover,
.sim-select:focus {
    border-color: var(--color-border);
    outline: none;
}

.sim-toggle-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    cursor: pointer;
    white-space: nowrap;
    user-select: none;
}

.sim-toggle-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-accent-primary);
    cursor: pointer;
}

/* ============================
   Reference Grid
   ============================ */
.sim-ref-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.sim-ref-card {
    background: var(--color-bg-primary);
    border: 1.5px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: var(--space-3);
    cursor: pointer;
    position: relative;
    transition: all var(--duration-fast) var(--ease-default);
    min-height: 72px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.sim-ref-card:hover:not(.is-removed) {
    border-color: var(--color-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.sim-ref-card:active:not(.is-removed) {
    transform: scale(0.98);
}

/* Removed state */
.sim-ref-card.is-removed {
    opacity: 0.35;
    background: var(--color-bg-secondary);
    filter: grayscale(0.5);
}

.sim-ref-card.is-removed:hover {
    opacity: 0.55;
}

/* Changed state */
.sim-ref-card.is-changed {
    border-left: 3px solid #34C759;
}

.sim-ref-card.is-changed .sim-ref-kimariji {
    animation: sim-kimariji-pulse 0.7s var(--ease-default);
}

.sim-ref-number {
    font-family: var(--font-display);
    font-size: 10px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    letter-spacing: 0.02em;
}

.sim-ref-kami {
    font-family: var(--font-mincho);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    line-height: 1.4;
    margin: var(--space-1) 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sim-ref-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-1);
}

/* Kimariji Badge */
.sim-ref-kimariji {
    display: inline-flex;
    align-items: center;
    font-family: var(--font-mincho);
    font-size: var(--text-xs);
    font-weight: 500;
    padding: 1px 6px;
    border-radius: 4px;
    line-height: 1.4;
    transition: background var(--duration-fast), color var(--duration-fast);
}

.sim-ref-kimariji[data-ki-len="1"] { background: var(--sim-ki-1-soft); color: var(--sim-ki-1); }
.sim-ref-kimariji[data-ki-len="2"] { background: var(--sim-ki-2-soft); color: #CC7700; }
.sim-ref-kimariji[data-ki-len="3"] { background: var(--sim-ki-3-soft); color: #B39500; }
.sim-ref-kimariji[data-ki-len="4"] { background: var(--sim-ki-4-soft); color: var(--sim-ki-4); }
.sim-ref-kimariji[data-ki-len="5"] { background: var(--sim-ki-5-soft); color: #1A8FC4; }
.sim-ref-kimariji[data-ki-len="6"] { background: var(--sim-ki-6-soft); color: var(--sim-ki-6); }

.sim-ref-len {
    font-family: var(--font-display);
    font-size: 10px;
    font-weight: 600;
    color: var(--color-text-tertiary);
}

/* ============================
   Setup Panel Overrides
   ============================ */
.sim-setup-panel {
    max-width: 500px;
    margin: 0 auto;
}

/* ============================
   Animations
   ============================ */
@keyframes sim-kimariji-pulse {
    0% {
        box-shadow: 0 0 0 0 var(--sim-green-glow);
    }
    40% {
        box-shadow: 0 0 0 6px rgba(52, 199, 89, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(52, 199, 89, 0);
    }
}

@keyframes sim-slide-up {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes sim-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================
   Empty / Info States
   ============================ */
.sim-empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-6);
    color: var(--color-text-tertiary);
}

.sim-empty-state p {
    font-size: var(--text-sm);
    line-height: 1.6;
}

.sim-info-banner {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    background: rgba(0, 113, 227, 0.04);
    border: 1px solid rgba(0, 113, 227, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.sim-info-icon {
    flex-shrink: 0;
    color: var(--color-accent-primary);
    font-size: var(--text-lg);
    line-height: 1.4;
}

/* ============================
   Kimariji Legend (mini)
   ============================ */
.sim-legend {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
    padding: var(--space-3) 0;
    margin-bottom: var(--space-4);
}

.sim-legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: 10px;
    color: var(--color-text-tertiary);
}

.sim-legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 2px;
    flex-shrink: 0;
}

.sim-legend-dot[data-ki="1"] { background: var(--sim-ki-1); }
.sim-legend-dot[data-ki="2"] { background: var(--sim-ki-2); }
.sim-legend-dot[data-ki="3"] { background: var(--sim-ki-3); }
.sim-legend-dot[data-ki="4"] { background: var(--sim-ki-4); }
.sim-legend-dot[data-ki="5"] { background: var(--sim-ki-5); }
.sim-legend-dot[data-ki="6"] { background: var(--sim-ki-6); }

/* ============================
   Responsive (≤ 600px)
   ============================ */
@media (max-width: 600px) {
    .sim-mode-select {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .sim-mode-card {
        padding: var(--space-6) var(--space-5);
    }

    .sim-mode-icon {
        width: 48px;
        height: 48px;
        margin-bottom: var(--space-4);
    }

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

    .sim-ref-card {
        min-height: 64px;
    }

    .sim-ref-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .sim-ref-actions {
        justify-content: center;
    }

    .sim-ref-filters {
        justify-content: center;
    }

    .sim-stats-header {
        flex-direction: column;
        gap: var(--space-2);
    }

    .sim-chart {
        height: 64px;
    }

    .sim-card {
        width: 36px;
        height: 50px;
        font-size: 10px;
    }

    .sim-card::after {
        font-size: 6px;
        width: 10px;
        height: 10px;
    }

    .sim-row {
        gap: 2px;
        margin-bottom: 2px;
    }

    .sim-detail-panel {
        padding: var(--space-4);
    }

    .sim-detail-poem {
        font-size: var(--text-base);
    }

    .sim-changelog {
        max-height: 200px;
    }

    .sim-prob-display {
        flex-wrap: wrap;
    }

    .sim-header {
        flex-wrap: wrap;
        gap: var(--space-2);
    }
}

/* ============================
   Reduced Motion
   ============================ */
@media (prefers-reduced-motion: reduce) {
    .sim-card,
    .sim-mode-card,
    .sim-ref-card,
    .sim-chart-fill,
    .sim-prob-fill {
        transition: none;
    }

    .sim-card.is-changed,
    .sim-ref-card.is-changed .sim-ref-kimariji {
        animation: none;
    }

    .sim-detail-panel {
        animation: none;
    }
}