/* pages/calculator/calculator.wxss */

/* ========== 全局 ========== */
page {
  height: 100%;
  background-color: #EBF4F8; /* Color 03 (Background) */
  display: flex;
  flex-direction: column;
}

.calculator-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding-bottom: constant(safe-area-inset-bottom);
  padding-bottom: env(safe-area-inset-bottom);
}

/* ========== 显示区域 ========== */
.display-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-end;
  padding: 30rpx 40rpx 20rpx;
  background: transparent; /* No more dark gradient */
  position: relative;
  overflow: hidden;
}

/* 顶部工具栏 */
.display-top-bar {
  position: absolute;
  top: 20rpx;
  left: 30rpx;
  right: 30rpx;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}

.top-actions {
  display: flex;
  gap: 20rpx;
}

.action-btn {
  width: 72rpx;
  height: 72rpx;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #ffffff;
  box-shadow: 0 4rpx 12rpx rgba(17, 97, 107, 0.15); /* Teal shadow */
}

.action-icon {
  font-size: 36rpx;
  color: #11616B; /* Color 01 */
}

/* 模式切换 */
.mode-indicator {
  display: flex;
  background: #ffffff;
  padding: 6rpx;
  border-radius: 16rpx; /* Reduced radius */
  box-shadow: 0 4rpx 12rpx rgba(17, 97, 107, 0.1);
}

.mode-indicator text {
  color: #7BBDB6; /* Color 02 */
  font-size: 26rpx;
  padding: 10rpx 30rpx;
  border-radius: 12rpx; /* Reduced radius */
  background: transparent;
  border: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

.mode-indicator text.active {
  color: #ffffff;
  background: #11616B; /* Color 01 */
  font-weight: 600;
  box-shadow: 0 2rpx 8rpx rgba(17, 97, 107, 0.2);
}

/* 表达式行 */
.history-text {
  font-size: 32rpx;
  color: rgba(17, 97, 107, 0.6); /* Color 01 faded */
  min-height: 44rpx;
  margin-bottom: 12rpx;
  font-family: -apple-system, 'SF Pro Display', 'Helvetica Neue', sans-serif;
  text-align: right;
  width: 100%;
  letter-spacing: 2rpx;
}

/* 当前值 */
.current-value {
  font-size: 130rpx;
  color: #11616B; /* Color 01 (Deep Teal) */
  line-height: 1.1;
  font-weight: 200;
  word-break: break-all;
  text-align: right;
  width: 100%;
  font-family: -apple-system, 'SF Pro Display', 'Helvetica Neue', sans-serif;
}

.current-value.shrink {
  font-size: 90rpx;
}

.current-value.shrink-more {
  font-size: 62rpx;
}

/* ========== 键盘区域 ========== */
.keypad-area {
  background: #EBF4F8; /* Color 03 */
  padding: 16rpx 24rpx 24rpx;
  display: flex;
  flex-direction: column;
  gap: 20rpx;
}

.keypad-area.scientific-pad {
  gap: 14rpx;
  padding-bottom: 20rpx;
}

/* 行 */
.row {
  display: flex;
  justify-content: space-between;
  gap: 20rpx;
}

.keypad-area.scientific-pad .row {
  gap: 14rpx;
}

.small-row {
  justify-content: space-around;
  gap: 8rpx;
}

/* ========== 按钮通用 ========== */
.btn {
  width: 152rpx;
  height: 152rpx;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 56rpx;
  font-weight: 400;
  font-family: -apple-system, 'SF Pro Display', 'Helvetica Neue', sans-serif;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4rpx 10rpx rgba(17, 97, 107, 0.05); /* Very subtle shadow */
}

/* 数字键 */
.digit {
  background-color: #ffffff;
  color: #11616B; /* Color 01 */
}

/* 功能键 (AC, +/-, %) */
.func {
  background-color: #7BBDB6; /* Color 02 (Medium Teal) */
  color: #ffffff;
  font-size: 46rpx;
  font-weight: 500;
}

/* 运算符 */
.operator {
  background-color: #FED9CD; /* Color 04 (Pale Pink/Peach) */
  color: #DC8B70; /* Color 05 (Terracotta) for contrast */
  font-size: 64rpx;
  font-weight: 400;
}

/* 等号键：渐变突出 */
.equal {
  background: #11616B; /* Color 01 (Deep Teal) */
  color: #ffffff;
  box-shadow: 0 6rpx 20rpx rgba(17, 97, 107, 0.3);
}

/* 0键 */
.zero {
  width: 324rpx;
  border-radius: 76rpx;
  justify-content: flex-start;
  padding-left: 62rpx;
  box-sizing: border-box;
}

/* 点击反馈 */
.btn-hover {
  transform: scale(0.92);
  opacity: 0.9;
}

/* 科学模式缩放 */
.keypad-area.scientific-pad .btn {
  width: 130rpx;
  height: 130rpx;
  font-size: 48rpx;
}

.keypad-area.scientific-pad .zero {
  width: 274rpx;
  border-radius: 65rpx;
}

.keypad-area.scientific-pad .func {
  font-size: 40rpx;
}

.keypad-area.scientific-pad .operator {
  font-size: 54rpx;
}

/* 科学功能键 */
.sci-btn {
  width: 120rpx !important;
  height: 120rpx !important;
  font-size: 32rpx !important;
  background: rgba(17, 97, 107, 0.05) !important; /* Very light teal bg */
  color: #11616B !important; /* Color 01 */
  border-radius: 50% !important;
  font-weight: 500 !important;
  letter-spacing: 1rpx;
}

/* ========== 历史记录面板 ========== */
.history-panel {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
}

.history-panel.show {
  pointer-events: auto;
  opacity: 1;
}

.history-mask {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(17, 97, 107, 0.4); /* Color 01 dim */
}

.history-content {
  position: relative;
  z-index: 101;
  background: #EBF4F8; /* Color 03 */
  border-radius: 0 0 16rpx 16rpx; /* Reduced radius */
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 16rpx 48rpx rgba(17, 97, 107, 0.2);
}

.history-panel.show .history-content {
  animation: histSlideDown 0.3s cubic-bezier(0.32, 0.72, 0, 1) forwards;
}

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

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 36rpx 40rpx;
  border-bottom: 2rpx solid rgba(17, 97, 107, 0.1);
}

.history-title {
  color: #11616B; /* Color 01 */
  font-size: 34rpx;
  font-weight: 600;
  letter-spacing: 1rpx;
}

.history-clear {
  color: #DC8B70; /* Color 05 */
  font-size: 28rpx;
  padding: 8rpx 24rpx;
  border-radius: 20rpx;
  background: rgba(220, 139, 112, 0.15); /* Color 05 faint */
}

.history-list {
  max-height: 58vh;
  padding: 10rpx 0;
}

.history-item {
  padding: 28rpx 40rpx;
  border-bottom: 1rpx solid rgba(17, 97, 107, 0.08); /* Darker border for light bg */
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.history-item:active {
  background: rgba(17, 97, 107, 0.05); /* Dark interaction state */
}

.history-expr {
  color: rgba(17, 97, 107, 0.6); /* Color 01 faded - Visible on light bg */
  font-size: 26rpx;
  margin-bottom: 8rpx;
  font-family: -apple-system, 'SF Pro Display', monospace;
}

.history-result {
  color: #11616B; /* Color 01 - Visible High Contrast */
  font-size: 42rpx;
  font-weight: 500;
  font-family: -apple-system, 'SF Pro Display', 'Helvetica Neue', sans-serif;
}

.history-empty {
  text-align: center;
  padding: 100rpx 0;
  color: rgba(17, 97, 107, 0.4);
  font-size: 28rpx;
}

.history-empty-icon {
  font-size: 64rpx;
  display: block;
  margin-bottom: 16rpx;
  opacity: 0.5;
}

/* Help Panel Styles */
.help-list {
  padding: 0; /* padding moved to inner section to avoid scroll-view width issues */
}

.help-section {
  display: flex;
  flex-direction: column;
  gap: 40rpx;
  padding: 30rpx 40rpx 60rpx; /* Apply padding here */
  box-sizing: border-box;
}

.help-item {
  display: flex;
  gap: 24rpx;
  align-items: flex-start;
}

.help-icon {
  font-size: 44rpx;
  width: 60rpx;
  text-align: center;
  padding-top: 4rpx;
}

.help-text {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.help-h1 {
  font-size: 30rpx;
  font-weight: bold;
  color: #11616B; /* Color 01 */
  margin-bottom: 12rpx;
}

.help-p {
  font-size: 26rpx;
  color: #2d3436;
  line-height: 1.6;
  opacity: 0.8;
}

.share-btn-large {
  background-color: #11616B !important; /* Color 01 */
  color: white !important;
  border-radius: 16rpx !important; /* Unified radius */
  font-size: 30rpx !important;
  font-weight: 500 !important;
  margin-top: 20rpx;
  width: 100% !important;
  box-shadow: 0 8rpx 20rpx rgba(17, 97, 107, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24rpx 0;
}

/* ========== 小屏适配 ========== */
@media (max-width: 360px) {
  .btn {
    width: 140rpx;
    height: 140rpx;
    font-size: 50rpx;
  }
  .zero {
    width: 300rpx;
  }
  .current-value {
    font-size: 110rpx;
  }
}