/* ============================================================
   偃武登封计算器 — 其徐如林主题样式
   移动优先 · 森林绿系 · 零依赖原生 CSS
   ============================================================ */

:root {
  /* 森林绿系 */
  --color-forest-deep: #1b4332;
  --color-forest: #2d6a4f;
  --color-bamboo: #52b788;
  --color-sprout: #95d5b2;
  --color-mist: #d8f3dc;
  --color-mist-light: #f0fff4;

  /* 中性色 */
  --color-text-primary: #1a1a2e;
  --color-text-secondary: #4a4a68;
  --color-text-muted: #8b8ba0;
  --color-bg-paper: #fafbf8;
  --color-bg-card: #ffffff;
  --color-border: #e0e5e0;
  --color-input-border: #c8d0c8;

  /* 点缀色 */
  --color-amber: #d4a373;
  --color-error: #bc4749;

  /* 间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-2xl: 32px;

  /* 圆角 */
  --radius-card: 12px;
  --radius-button: 8px;
  --radius-input: 8px;

  /* 阴影 */
  --shadow-card: 0 2px 12px rgba(27, 67, 50, 0.06);
  --shadow-hover: 0 4px 20px rgba(27, 67, 50, 0.10);

  /* 字体 */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", "Consolas", monospace;

  /* 动画 */
  --transition-base: 220ms ease-out;
}

/* ============================================================
   基础重置
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, p {
  margin: 0;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input {
  font-family: inherit;
}

/* ============================================================
   顶部标题栏
   ============================================================ */

.header {
  background: linear-gradient(135deg, var(--color-forest-deep) 0%, var(--color-forest) 100%);
  color: #ffffff;
  padding: 20px;
  min-height: 100px;
  display: flex;
  align-items: center;
  overflow: hidden;
  position: relative;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.header__text {
  flex: 1;
}

.header__title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 1px;
}

.header__subtitle {
  font-family: var(--font-serif);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 4px;
  margin-top: 4px;
}

.header__forest {
  width: 200px;
  height: 80px;
  flex-shrink: 0;
  opacity: 0.7;
}

/* ============================================================
   主区域
   ============================================================ */

.main {
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  max-width: 100%;
  margin: 0 auto;
}

/* ============================================================
   模式选择
   ============================================================ */

.mode {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.mode__btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 52px;
  padding: 0 var(--space-sm);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-button);
  background-color: var(--color-bg-card);
  color: var(--color-forest-deep);
  position: relative;
  transition: all var(--transition-base);
  overflow: hidden;
}

.mode__btn--active {
  background-color: var(--color-forest-deep);
  color: #ffffff;
  border-color: var(--color-forest-deep);
}

.mode__btn--active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--color-bamboo);
}

.mode__label {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
}

.mode__hint {
  font-size: 12px;
  margin-top: 2px;
  opacity: 0.7;
  line-height: 1;
}

/* ============================================================
   卡片基础
   ============================================================ */

.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.card--section {
  margin-bottom: var(--space-lg);
}

.card__header {
  display: flex;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  user-select: none;
  position: relative;
  transition: background-color var(--transition-base);
}

.card__header:hover {
  background-color: var(--color-mist-light);
}

.card__bar {
  display: inline-block;
  width: 3px;
  height: 16px;
  background-color: var(--color-bamboo);
  margin-right: var(--space-sm);
  border-radius: 1.5px;
}

.card__title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-forest-deep);
  flex: 1;
}

.card__arrow {
  width: 16px;
  height: 16px;
  color: var(--color-forest);
  transition: transform var(--transition-base);
  transform: rotate(0deg);
}

.card__arrow--open {
  transform: rotate(180deg);
}

.card__body {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
  display: none;
}

.card__body--open {
  display: block;
}

/* ============================================================
   网格布局
   ============================================================ */

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md) var(--space-md);
}

/* ============================================================
   输入项
   ============================================================ */

.field {
  display: flex;
  flex-direction: column;
}

.field--full {
  grid-column: 1 / -1;
}

.field__label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
  font-weight: 500;
}

.field__input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input {
  width: 100%;
  height: 44px;
  padding: 0 44px 0 var(--space-md);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-input);
  background-color: var(--color-bg-card);
  font-size: 15px;
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  transition: border-color var(--transition-base),
              box-shadow var(--transition-base);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.input:focus {
  border-color: var(--color-forest);
  box-shadow: 0 0 0 3px rgba(45, 106, 79, 0.12);
}

.input--error {
  border-color: var(--color-error);
}

.input--error:focus {
  box-shadow: 0 0 0 3px rgba(188, 71, 73, 0.12);
}

.input--center {
  text-align: center;
  padding: 0 var(--space-sm);
}

.field__unit {
  position: absolute;
  right: var(--space-md);
  font-size: 13px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.input--center + .field-speed__label,
.input--center ~ .field-speed__label {
  position: static;
}

.field__error {
  font-size: 13px;
  color: var(--color-error);
  margin-top: var(--space-xs);
  min-height: 18px;
  line-height: 1.4;
}

/* 加速政令四项 */
.field-speed {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.field-speed__item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.field-speed__label {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 2px;
  line-height: 1;
}

/* ============================================================
   计算按钮
   ============================================================ */

.btn-submit {
  width: 100%;
  height: 52px;
  border-radius: var(--radius-button);
  background-color: var(--color-forest-deep);
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin: var(--space-xl) 0;
  transition: background-color var(--transition-base),
              transform 100ms ease-out;
  -webkit-appearance: none;
  appearance: none;
}

.btn-submit:hover {
  background-color: var(--color-forest);
}

.btn-submit:active {
  transform: scale(0.98);
  background-color: #14372a;
}

.btn-submit--loading {
  background-color: var(--color-forest);
  cursor: not-allowed;
  pointer-events: none;
}

.btn-submit__spinner {
  width: 18px;
  height: 18px;
  display: none;
  color: var(--color-bamboo);
  animation: spin 800ms linear infinite;
}

.btn-submit--loading .btn-submit__spinner {
  display: inline-block;
}

.btn-submit--loading .btn-submit__text::after {
  content: "...";
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ============================================================
   结果区
   ============================================================ */

.result {
  margin-top: var(--space-lg);
  animation: result-in 350ms ease-out;
}

@keyframes result-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result__card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.result__card-header {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-md);
}

.result__card-bar {
  width: 3px;
  height: 18px;
  background-color: var(--color-bamboo);
  margin-right: var(--space-sm);
  border-radius: 1.5px;
}

.result__card-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-forest-deep);
}

/* 总积分卡片 */
.result__card--points {
  background: linear-gradient(135deg, var(--color-mist-light) 0%, var(--color-mist) 100%);
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
}

.result__points-label {
  font-size: 13px;
  color: rgba(27, 67, 50, 0.7);
  letter-spacing: 2px;
}

.result__points-value {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-amber);
  margin-top: var(--space-xs);
  line-height: 1.1;
}

.result__points-phase {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
}

.result__timeout-hint {
  font-size: 13px;
  color: var(--color-amber);
  margin-bottom: var(--space-sm);
}

/* 活动明细 */
.activity-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

.activity-item {
  text-align: center;
  padding: var(--space-md) 0;
  background-color: var(--color-mist-light);
  border-radius: var(--radius-input);
}

.activity-item--zero {
  background-color: #f7f8f5;
}

.activity-item__name {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.activity-item__value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-forest-deep);
  line-height: 1.2;
}

.activity-item--zero .activity-item__value {
  color: var(--color-text-muted);
}

.activity-item__unit {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-left: var(--space-xs);
}

.activity-item__extra {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: 2px;
  line-height: 1.3;
}

/* 宝箱策略 */
.chest-row {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.chest-row:last-child {
  border-bottom: none;
}

.chest-row--zero {
  color: var(--color-text-muted);
}

.chest-row__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xs);
}

.chest-row__tier {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-forest-deep);
}

.chest-row--zero .chest-row__tier {
  color: var(--color-text-muted);
  font-weight: 500;
}

.chest-row__count {
  font-size: 13px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.chest-row__resources {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-primary);
}

.chest-row__resource {
  display: inline-block;
}

.chest-row__unopened {
  margin-left: auto;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* 消耗与剩余 */
.consume-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.consume-block__title {
  font-size: 13px;
  color: var(--color-text-secondary);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.consume-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-xs) 0;
  font-size: 15px;
}

.consume-row__label {
  color: var(--color-text-secondary);
}

.consume-row__value {
  font-family: var(--font-mono);
  color: var(--color-text-primary);
}

.consume-row__sub {
  font-size: 12px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.consume-row--zero .consume-row__value {
  color: var(--color-text-muted);
}

/* 两阶段明细 */
.phase-box {
  padding: var(--space-md) var(--space-lg);
  background-color: var(--color-mist-light);
  border-radius: var(--radius-input);
  margin-bottom: var(--space-lg);
  font-size: 14px;
  color: var(--color-text-secondary);
}

.phase-box__row {
  padding: var(--space-xs) 0;
}

.phase-box__row strong {
  color: var(--color-forest-deep);
  font-weight: 600;
}

/* 零积分提示 */
.zero-message {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  font-size: 15px;
  color: var(--color-text-secondary);
}

/* 重新计算按钮 */
.btn-recalc {
  width: 100%;
  height: 48px;
  border: 1.5px solid var(--color-forest);
  border-radius: var(--radius-button);
  background-color: transparent;
  color: var(--color-forest);
  font-size: 15px;
  font-weight: 600;
  margin-top: var(--space-lg);
  transition: all var(--transition-base);
}

.btn-recalc:hover {
  background-color: var(--color-mist-light);
}

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

/* 旧模式提示 */
.stale-hint {
  font-size: 13px;
  color: var(--color-amber);
  margin-bottom: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background-color: rgba(212, 163, 115, 0.08);
  border-radius: var(--radius-input);
}

/* 表单错误 */
.form-error {
  color: var(--color-error);
  text-align: center;
  padding: var(--space-md);
  margin-top: var(--space-md);
  font-size: 14px;
}

/* ============================================================
   页脚
   ============================================================ */

.footer {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  color: var(--color-text-muted);
  font-size: 13px;
}

.footer__text {
  font-family: var(--font-serif);
  letter-spacing: 2px;
}

/* ============================================================
   响应式：平板 ≥768px
   ============================================================ */

@media (min-width: 768px) {
  :root {
    --radius-card: 16px;
  }

  .header {
    min-height: 120px;
    padding: var(--space-xl) var(--space-xl);
  }

  .header__title {
    font-size: 26px;
  }

  .header__subtitle {
    font-size: 15px;
  }

  .main {
    padding: var(--space-xl) var(--space-xl) var(--space-2xl);
    max-width: 680px;
  }

  .grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .activity-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .consume-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    position: relative;
  }

  .consume-grid::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background-color: var(--color-border);
    transform: translateX(-50%);
  }

  .result__points-value {
    font-size: 42px;
  }
}

/* ============================================================
   响应式：桌面 ≥1024px
   ============================================================ */

@media (min-width: 1024px) {
  .main {
    max-width: 860px;
  }

  .grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .result__card {
    box-shadow: var(--shadow-hover);
    transition: box-shadow var(--transition-base);
  }

  .result__points-value {
    font-size: 48px;
  }
}

/* ============================================================
   响应式：宽屏 ≥1280px
   ============================================================ */

@media (min-width: 1280px) {
  .main {
    max-width: 960px;
  }
}

/* ============================================================
   可访问性：减少动画偏好
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}