@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&display=swap");

:root {
  /* 核心色彩：深色、理性、低调科技感 */
  --bg: #0b1220;
  --bg-glow: #131c2f;
  --card: #101a2c;
  --border: #1e2a44;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: radial-gradient(900px 500px at 10% -10%, var(--bg-glow), transparent 60%),
    var(--bg);
}

.app {
  /* 居中布局，保持简洁与聚焦 */
  max-width: 760px;
  margin: 48px auto 80px;
  padding: 0 20px;
  display: grid;
  gap: 18px;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.title-group h1 {
  margin: 0;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 1px;
}

.subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.date-block {
  text-align: right;
}

.label {
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.date {
  display: block;
  font-size: 16px;
  margin-top: 6px;
}

.card {
  /* 卡片式布局，低调但有层级 */
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 20px 20px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.card h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 500;
}

.progress,
.streak {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.value {
  color: var(--text);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.unit {
  color: var(--muted);
  font-size: 12px;
}

.task-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.task-item {
  /* 任务条目，轻量科技感 */
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
}

.task-item:hover {
  border-color: var(--border);
}

.task-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.task-text {
  color: var(--text);
  font-size: 14px;
}

.task-item.done .task-text {
  color: var(--muted);
  text-decoration: line-through;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.sheet-button {
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
}

.sheet-button:hover {
  border-color: var(--accent);
}

.review-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.review-block {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.review-block summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  list-style: none;
}

.review-block summary::-webkit-details-marker {
  display: none;
}

.review-goal {
  margin: 8px 0 10px;
  font-size: 12px;
  color: var(--muted);
}

.review-questions {
  display: grid;
  gap: 12px;
  font-size: 13px;
  color: var(--text);
}

.review-questions p {
  margin: 0;
}

.review-item {
  display: grid;
  gap: 6px;
}

.review-title {
  margin-top: 6px;
  color: var(--accent);
  font-weight: 500;
}

.review-highlight {
  margin-top: 6px;
  color: var(--text);
  font-weight: 600;
}

.ability-groups {
  display: grid;
  gap: 14px;
}

.ability-group-title {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.ability-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.ability-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid transparent;
}

.ability-item:hover {
  border-color: var(--border);
}

.ability-item input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

.ability-text {
  color: var(--text);
  font-size: 13px;
}

.ability-item.done .ability-text {
  color: var(--muted);
  text-decoration: line-through;
}

.history-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.history-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
}

.history-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 14px;
}

.history-percent {
  color: var(--accent);
  font-weight: 600;
}

.history-meta {
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.history-text {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text);
  line-height: 1.5;
  white-space: pre-wrap;
}

/* Sheet 结构：侧边抽屉 */
.sheet-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 16, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 20;
}

.sheet-backdrop.is-open {
  opacity: 1;
  pointer-events: auto;
}

.sheet {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(420px, 92vw);
  background: var(--card);
  border-left: 1px solid var(--border);
  box-shadow: -12px 0 30px rgba(0, 0, 0, 0.35);
  transform: translateX(100%);
  transition: transform 0.25s ease;
  z-index: 30;
  display: flex;
  flex-direction: column;
}

.sheet.is-open {
  transform: translateX(0);
}

.sheet-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px 12px;
  border-bottom: 1px solid var(--border);
}

.sheet-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
}

.sheet-close {
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}

.sheet-close:hover {
  color: var(--text);
  border-color: var(--accent);
}

.sheet-content {
  padding: 16px 20px 20px;
  overflow-y: auto;
}

textarea {
  /* 复盘输入区，突出专注感 */
  width: 100%;
  min-height: 140px;
  resize: vertical;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(10, 14, 26, 0.6);
  color: var(--text);
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.6;
}

details textarea {
  margin-top: 10px;
  min-height: 120px;
}

.review-answer {
  width: 100%;
  min-height: 64px;
  resize: vertical;
}

textarea:focus {
  outline: 2px solid var(--accent-soft);
  border-color: var(--accent);
}

.muted {
  color: var(--muted);
}

@media (max-width: 600px) {
  /* 移动端简化排版 */
  .top {
    flex-direction: column;
    align-items: flex-start;
  }

  .date-block {
    text-align: left;
  }
}