/* Reset & Variables */
.ss-app {
  --ss-bg: #f6f8fb;
  --ss-panel: #ffffff;
  --ss-line: #e5e7eb;
  --ss-txt: #0f172a;
  --ss-muted: #475569;
  --ss-accent: #2563eb;
  --ss-danger: #dc2626;
  --ss-ok: #16a34a;
  --ss-boy: #dbeafe;
  --ss-girl: #ffe4e6;
  --ss-unknown: #f1f5f9;
  --ss-seat: #ffffff;
  --ss-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
  --ss-radius: 14px;
}

.ss-app * {
  box-sizing: border-box;
}

.ss-app {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--ss-txt);
  background: var(--ss-bg);
  padding: 0;
  margin: 0;
}

/* Header */
.ss-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 248, 251, 0.9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--ss-line);
}

.ss-topbar {
  max-width: 1400px;
  margin: 0 auto;
  padding: 10px 14px;
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.ss-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.ss-steps {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.ss-step {
  padding: 8px 10px;
  border: 1px solid var(--ss-line);
  background: var(--ss-panel);
  border-radius: 999px;
  font-size: 13px;
  color: var(--ss-muted);
  cursor: pointer;
  user-select: none;
}

.ss-step.ss-active {
  border-color: rgba(37, 99, 235, 0.35);
  color: var(--ss-txt);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.1);
}

/* Container */
.ss-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 14px;
}

.ss-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

/* Settings Screen Layout */
.ss-grid-settings {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 20px;
}

@media (max-width: 1100px) {
  .ss-grid-settings {
    grid-template-columns: 1fr;
  }
}

/* Card */
.ss-card {
  background: var(--ss-panel);
  border: 1px solid var(--ss-line);
  border-radius: var(--ss-radius);
  box-shadow: var(--ss-shadow);
  overflow: hidden;
}

.ss-card .ss-hd {
  padding: 12px 14px;
  border-bottom: 1px solid var(--ss-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.ss-card .ss-hd h2 {
  font-size: 14px;
  margin: 0;
}

.ss-card .ss-bd {
  padding: 12px 14px;
}

/* Sidebar */
.ss-sidebar {
  background: var(--ss-panel);
  border: 1px solid var(--ss-line);
  border-radius: var(--ss-radius);
  box-shadow: var(--ss-shadow);
  padding: 16px;
  position: sticky;
  top: 70px;
  height: fit-content;
}

.ss-sidebar-section {
  margin-bottom: 20px;
}

.ss-sidebar-section:last-child {
  margin-bottom: 0;
}

.ss-sidebar-title {
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--ss-txt);
}

/* Typography */
.ss-muted {
  color: var(--ss-muted);
  font-size: 13px;
  line-height: 1.5;
}

.ss-hint {
  font-size: 12px;
  color: var(--ss-muted);
  line-height: 1.4;
}

/* Form Elements */
.ss-row {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.ss-row + .ss-row {
  margin-top: 10px;
}

.ss-app label {
  font-size: 12px;
  color: var(--ss-muted);
  display: block;
  margin-bottom: 4px;
}

.ss-app input[type="number"],
.ss-app input[type="text"],
.ss-app select,
.ss-app textarea {
  width: 100%;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid var(--ss-line);
  background: #fff;
  color: var(--ss-txt);
  outline: none;
  font-size: 16px;
}

.ss-app textarea {
  min-height: 100px;
  resize: vertical;
  font-family: inherit;
}

/* Buttons */
.ss-btn {
  border: none;
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  user-select: none;
  width: 100%;
  justify-content: center;
}

.ss-btn.ss-primary {
  background: var(--ss-accent);
  color: #fff;
}

.ss-btn.ss-ghost {
  background: #fff;
  border: 1px solid var(--ss-line);
  color: var(--ss-txt);
}

.ss-btn.ss-danger {
  background: var(--ss-danger);
  color: #fff;
}

.ss-btn.ss-ok {
  background: var(--ss-ok);
  color: #fff;
}

.ss-btn.ss-small {
  padding: 7px 10px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 12px;
  width: auto;
}

.ss-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Chips */
.ss-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--ss-line);
  background: #fff;
  font-size: 12px;
  color: var(--ss-muted);
}

.ss-hr {
  height: 1px;
  background: var(--ss-line);
  margin: 12px 0;
}

/* Stats Row */
.ss-stat-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

/* Seat Grid */
.ss-seat-wrap {
  padding: 20px;
}

.ss-seat-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.ss-legend {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.ss-swatch {
  width: 14px;
  height: 14px;
  border-radius: 5px;
  border: 1px solid rgba(15, 23, 42, 0.08);
}

.ss-swatch.ss-boy-swatch {
  background: var(--ss-boy);
}

.ss-swatch.ss-girl-swatch {
  background: var(--ss-girl);
}

.ss-swatch.ss-unknown-swatch {
  background: var(--ss-unknown);
}

/* 名前表示切り替えドロップダウン */
.ss-name-mode-select {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--ss-line);
  background: #fff;
  font-size: 12px;
  font-weight: 700;
  color: var(--ss-txt);
  cursor: pointer;
  outline: none;
}

.ss-seat-grid {
  display: grid;
  gap: 10px;
  align-items: stretch;
}

.ss-seat {
  border: 1px solid var(--ss-line);
  border-radius: 14px;
  padding: 20px 12px;
  min-height: 80px;
  background: var(--ss-seat);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  position: relative;
  transition: transform 0.06s ease, box-shadow 0.12s ease, opacity 0.12s ease;
  will-change: transform;
}

.ss-seat:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 18px rgba(15, 23, 42, 0.08);
}

.ss-seat .ss-name {
  font-weight: 900;
  font-size: 20px;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  width: 100%;
  color: var(--ss-txt);
}

/* 縮小モード */
.ss-seat .ss-name.ss-name-small {
  font-size: 14px;
}

/* 省略モード */
.ss-seat .ss-name.ss-name-truncate {
  font-size: 20px;
}

.ss-seat.ss-boy-seat {
  background: var(--ss-boy);
}

.ss-seat.ss-girl-seat {
  background: var(--ss-girl);
}

.ss-seat.ss-unknown-seat {
  background: var(--ss-unknown);
}

.ss-seat.ss-dim {
  opacity: 0.35;
}

.ss-seat.ss-selected {
  outline: 3px solid rgba(37, 99, 235, 0.6);
  opacity: 1 !important;
  box-shadow: 0 0 0 6px rgba(37, 99, 235, 0.15);
}

.ss-seat.ss-pinned::after {
  content: "📌";
  position: absolute;
  left: 8px;
  top: 6px;
  font-size: 12px;
}

/* 空白席（③画面のみ） */
.ss-seat.ss-void {
  opacity: 0.4;
  background: #f1f5f9 !important;
  pointer-events: none;
  cursor: default;
}

.ss-seat.ss-void:hover {
  transform: none;
  box-shadow: none;
}

/* 座席の削除ボタン（児童名の×） */
.ss-seat-delete {
  position: absolute;
  right: 6px;
  top: 6px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(220, 38, 38, 0.1);
  color: var(--ss-danger);
  border: 1px solid rgba(220, 38, 38, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  opacity: 0.6;
  transition: all 0.15s;
  z-index: 2;
  line-height: 1;
}

.ss-seat-delete:hover {
  opacity: 1;
  transform: scale(1.1);
  background: rgba(220, 38, 38, 0.2);
}

/* 前提セクション（②画面） */
.ss-premise-section {
  background: #fff;
  border: 1px solid var(--ss-line);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 20px;
}

.ss-premise-title {
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 12px;
}

/* 条件セクション（②画面） */
.ss-conditions-section {
  background: #fff;
  border: 1px solid var(--ss-line);
  border-radius: 14px;
  padding: 16px;
}

.ss-section-title {
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 12px;
}

/* 3カラムグリッド */
.ss-conditions-grid {
  display: grid;
  grid-template-columns: 2fr 1.5fr 1.5fr;
  gap: 16px;
}

@media (max-width: 1100px) {
  .ss-conditions-grid {
    grid-template-columns: 1fr;
  }
}

/* カラム */
.ss-condition-column {
  border: 1px solid var(--ss-line);
  border-radius: 12px;
  padding: 12px;
  background: #fbfdff;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ss-column-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--ss-line);
}

.ss-column-title {
  font-weight: 800;
  font-size: 16px;
  flex: 1;
}

.ss-column-content {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 200px;
}

/* Condition Blocks */
.ss-check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}

.ss-check-row input {
  transform: scale(1.1);
}

.ss-check-row label {
  font-size: 14px;
  cursor: pointer;
}

.ss-group-card {
  border: 1px dashed var(--ss-line);
  border-radius: 14px;
  padding: 10px;
  background: #fff;
}

.ss-group-hd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 8px;
}

.ss-group-hd .ss-tag {
  font-size: 14px;
  color: var(--ss-muted);
  font-weight: 700;
}

.ss-group-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.ss-pair-selector {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.ss-pair-selector select {
  flex: 1;
  min-width: 100px;
}

.ss-inline {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

/* Modal */
.ss-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 50;
}

.ss-modal-overlay.ss-show {
  display: flex;
}

.ss-modal {
  width: min(900px, 100%);
  background: #fff;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.25);
  overflow: hidden;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
}

.ss-modal .ss-mh {
  padding: 12px 14px;
  border-bottom: 1px solid var(--ss-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-shrink: 0;
}

.ss-modal .ss-mh h3 {
  margin: 0;
  font-size: 14px;
}

.ss-modal .ss-mb {
  padding: 12px 14px;
  overflow-y: auto;
  flex: 1;
}

.ss-modal .ss-mf {
  padding: 12px 14px;
  border-top: 1px solid var(--ss-line);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  flex-wrap: wrap;
  flex-shrink: 0;
}

.ss-error-list {
  margin: 0;
  padding-left: 18px;
  color: var(--ss-danger);
  font-size: 13px;
  line-height: 1.6;
}

/* Download Canvas (hidden) */
#ssDownloadCanvas {
  position: absolute;
  left: -9999px;
  top: -9999px;
}

/* Section Divider */
.ss-section-divider {
  height: 2px;
  background: linear-gradient(to right, transparent, var(--ss-line), transparent);
  margin: 20px 0;
}

/* Student List (for modal) */
.ss-student-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 300px;
  overflow-y: auto;
  padding: 8px;
  background: #f9fafb;
  border-radius: 8px;
}

.ss-stu-opt {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
}

.ss-stu-opt:hover {
  background: #fff;
}

.ss-stu-badge {
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  background: #e5e7eb;
  color: var(--ss-muted);
}

/* Animation Styles */
.ss-seat.ss-animating {
  pointer-events: none;
}

@keyframes slotSpin {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

@keyframes cardFlip {
  0% { transform: rotateY(0deg); }
  50% { transform: rotateY(90deg); }
  100% { transform: rotateY(0deg); }
}

@keyframes popBounce {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}