/* ============================================================
 * Stepwise · 移动端 H5 样式
 * 主色：#4F8AFB（步子蓝）/ 强调：#2EBD85（成长绿）
 * ============================================================ */

:root {
  --color-primary: #4F8AFB;
  --color-primary-dark: #3a72df;
  --color-success: #2EBD85;
  --color-warn: #F0A500;
  --color-danger: #E94B4B;
  --color-text: #1f2430;
  --color-text-soft: #5f6675;
  --color-text-mute: #8a90a0;
  --color-bg: #f4f6fb;
  --color-card: #ffffff;
  --color-border: #e6e9f1;
  --color-shadow: 0 4px 16px rgba(20, 30, 60, 0.06);
  --color-shadow-lg: 0 8px 28px rgba(20, 30, 60, 0.12);

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  --tabbar-h: calc(56px + env(safe-area-inset-bottom, 0));
  --header-h: 52px;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Helvetica Neue", "Microsoft YaHei", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

body {
  min-height: 100vh;
  padding-bottom: var(--tabbar-h);
}

a { color: var(--color-primary); text-decoration: none; }
a:active { opacity: 0.7; }

button { font-family: inherit; }

img { max-width: 100%; }

/* ---------- header ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  padding-top: env(safe-area-inset-top, 0);
}
.app-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
  font-weight: 600;
}
.brand__logo { width: 28px; height: 28px; border-radius: 8px; }
.brand__name { font-size: 17px; }

.app-header__right { display: flex; align-items: center; gap: 12px; }
.header-link {
  font-size: 14px;
  color: var(--color-text-soft);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
}
.header-link--primary {
  color: #fff;
  background: var(--color-primary);
  padding: 6px 12px;
}
.header-greet {
  font-size: 13px;
  color: var(--color-text-soft);
}

/* ---------- main ---------- */
.app-main {
  padding: 14px 16px 24px;
  max-width: 720px;
  margin: 0 auto;
}

/* ---------- flash ---------- */
.flash-stack {
  position: fixed;
  top: calc(env(safe-area-inset-top, 0) + 12px);
  left: 12px;
  right: 12px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.flash {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 10px 12px;
  box-shadow: var(--color-shadow-lg);
  font-size: 14px;
  animation: flash-in 0.18s ease-out;
}
.flash--success { border-left-color: var(--color-success); }
.flash--warn    { border-left-color: var(--color-warn); }
.flash--error   { border-left-color: var(--color-danger); }
.flash--info    { border-left-color: var(--color-primary); }
.flash__msg { flex: 1; color: var(--color-text); }
.flash__close {
  border: none;
  background: transparent;
  font-size: 22px;
  line-height: 1;
  color: var(--color-text-mute);
  padding: 0 6px;
  cursor: pointer;
}
@keyframes flash-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- tabbar ---------- */
.tabbar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: var(--tabbar-h);
  padding-bottom: env(safe-area-inset-bottom, 0);
  background: var(--color-card);
  border-top: 1px solid var(--color-border);
  display: flex;
  z-index: 50;
}
.tabbar__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--color-text-mute);
  font-size: 12px;
  min-height: 48px;
}
.tabbar__item.is-active { color: var(--color-primary); }
.tabbar__icon { line-height: 0; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: var(--radius);
  padding: 12px 18px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.06s ease, opacity 0.15s ease;
  min-height: 44px;
}
.btn:active { transform: scale(0.98); opacity: 0.9; }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-dark); }
.btn--ghost { background: transparent; color: var(--color-primary); border: 1px solid var(--color-primary); }
.btn--danger { background: #fff; color: var(--color-danger); border: 1px solid var(--color-border); }
.btn--block { width: 100%; }

/* ---------- forms ---------- */
.form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field__label { font-size: 13px; color: var(--color-text-soft); padding-left: 2px; }
.field__input {
  border: 1px solid var(--color-border);
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 16px;
  color: var(--color-text);
  outline: none;
  width: 100%;
  min-height: 44px;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
.field__input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 138, 251, 0.15);
}
.field__input--textarea { resize: vertical; min-height: 88px; }

.form-error {
  background: #fdecec;
  color: var(--color-danger);
  border: 1px solid #f5c2c2;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 14px;
}

/* ---------- auth card ---------- */
.page--auth { background: linear-gradient(160deg, #eaf1ff 0%, #f4f6fb 60%); }
.page--auth .app-main { padding-top: 24px; }
.auth-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: var(--color-shadow);
}
.auth-card__brand { text-align: center; margin-bottom: 18px; }
.auth-card__logo { width: 56px; height: 56px; border-radius: 14px; }
.auth-card__title { margin: 8px 0 4px; font-size: 22px; }
.auth-card__slogan { margin: 0; color: var(--color-text-soft); font-size: 14px; }
.auth-card__footer {
  text-align: center;
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-text-soft);
}

/* ---------- hero (tasks index) ---------- */
.hero {
  background: linear-gradient(135deg, #4F8AFB 0%, #6FA9FF 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  box-shadow: var(--color-shadow);
  margin-bottom: 14px;
}
.hero__title { margin: 0; font-size: 18px; font-weight: 600; }
.hero__sub   { margin: 6px 0 10px; font-size: 13px; opacity: 0.92; }
.hero__sub strong { font-size: 16px; font-weight: 700; }
.hero__overdue {
  background: rgba(255, 255, 255, .22);
  padding: 1px 8px;
  border-radius: 999px;
  font-weight: 600;
}
.hero__bar {
  height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,0.25);
  overflow: hidden;
}
.hero__bar-fill {
  height: 100%;
  background: #fff;
  border-radius: 999px;
  transition: width 0.4s ease;
}

/* ---------- segment / tabs ---------- */
.seg {
  display: flex;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px;
  margin-bottom: 14px;
  overflow: hidden;
}
.seg__item {
  flex: 1;
  text-align: center;
  padding: 8px 0;
  font-size: 14px;
  color: var(--color-text-soft);
  border-radius: 999px;
  cursor: pointer;
  position: relative;
}
.seg__item.is-active {
  background: var(--color-primary);
  color: #fff;
  font-weight: 500;
}
.seg--in-form { border-radius: var(--radius); padding: 4px; }
.seg--in-form .seg__item { border-radius: var(--radius); }
.seg--in-form input[type="radio"] { display: none; }

/* 计划日期分段：双行（主标签 + 小字日期） */
.seg__item--plan {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 0 6px;
  line-height: 1.2;
}
.seg__plan-label { font-size: 14px; }
.seg__plan-date {
  font-size: 11px;
  color: var(--color-text-soft);
  letter-spacing: 0.2px;
}
.seg__item--plan.is-active .seg__plan-date { color: rgba(255,255,255,.85); }

/* ---------- task list ---------- */
.task-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.task-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 12px 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  box-shadow: var(--color-shadow);
  border-left: 4px solid var(--color-primary);
}
.task-card.is-done { opacity: 0.65; }
.task-card.is-done .task-card__title { text-decoration: line-through; color: var(--color-text-mute); }
.task-card--prio-0 { border-left-color: #b9c2d4; }
.task-card--prio-1 { border-left-color: var(--color-primary); }
.task-card--prio-2 { border-left-color: var(--color-warn); }

.task-card__check-form { margin: 0; }
.task-card__check {
  appearance: none;
  width: 28px; height: 28px;
  border-radius: 999px;
  border: 2px solid var(--color-border);
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin-top: 2px;
  flex-shrink: 0;
}
.task-card.is-done .task-card__check {
  background: var(--color-success);
  border-color: var(--color-success);
}

.task-card__body { flex: 1; min-width: 0; }
.task-card__title { font-size: 16px; font-weight: 500; word-break: break-word; }
.task-card__desc {
  margin-top: 4px;
  font-size: 13px;
  color: var(--color-text-soft);
  word-break: break-word;
}
.task-card__meta {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: var(--color-text-mute);
  align-items: center;
}
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  background: #eef2fb;
  color: var(--color-primary);
}
.badge--prio-0 { background: #f0f1f4; color: #6b7385; }
.badge--prio-1 { background: #e8f0ff; color: var(--color-primary); }
.badge--prio-2 { background: #fff1d8; color: #b87a00; }
.meta { font-size: 12px; }
.meta--overdue {
  color: #E94B4B;
  font-weight: 500;
}

.task-card__delete-form { margin: 0; }
.task-card__delete {
  appearance: none;
  background: transparent;
  border: none;
  color: var(--color-text-mute);
  padding: 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
}
.task-card__delete:active { color: var(--color-danger); }

/* ---------- empty state ---------- */
.empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-soft);
}
.empty__emoji { font-size: 48px; margin-bottom: 8px; }
.empty__text { margin: 0 0 18px; line-height: 1.7; }

/* ---------- FAB ---------- */
.fab {
  position: fixed;
  right: 18px;
  bottom: calc(var(--tabbar-h) + 16px);
  width: 52px; height: 52px;
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: 0 6px 16px rgba(79, 138, 251, 0.45);
  z-index: 40;
}

/* ---------- page card ---------- */
.page-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 18px 18px 20px;
  box-shadow: var(--color-shadow);
}
.page-card__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}
.page-card__title { margin: 0; font-size: 18px; }
.back-link {
  color: var(--color-text-soft);
  font-size: 14px;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  margin-right: 4px;
}

/* ---------- page head ---------- */
.page-head { margin-bottom: 14px; }
.page-head__title { margin: 0; font-size: 20px; }
.page-head__sub { margin: 4px 0 0; color: var(--color-text-soft); font-size: 13px; }

/* ---------- chip 过滤条 ---------- */
.chip-bar {
  display: flex;
  gap: 8px;
  margin: 0 0 14px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.chip-bar::-webkit-scrollbar { display: none; }
.chip {
  flex: 0 0 auto;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-soft);
  font-size: 13px;
  text-decoration: none;
  line-height: 1.4;
  transition: background .15s, color .15s, border-color .15s;
}
.chip:hover { color: var(--color-text); }
.chip.is-active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
  font-weight: 500;
}

/* ---------- log list ---------- */
.log-day { margin-bottom: 16px; }
.log-day__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 6px;
  margin-bottom: 6px;
  color: var(--color-text-soft);
  font-size: 13px;
}
.log-day__date { font-weight: 600; color: var(--color-text); }

.log-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.log-item {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 12px 12px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  box-shadow: var(--color-shadow);
}
.log-item__badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  color: #fff;
  font-size: 12px;
  flex-shrink: 0;
  line-height: 1.2;
  margin-top: 2px;
}
.log-item__body { flex: 1; min-width: 0; }
.log-item__title { font-size: 15px; word-break: break-word; }
.log-item__time { margin-top: 4px; font-size: 12px; color: var(--color-text-mute); }

/* ---------- pager ---------- */
.pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding: 8px 4px;
  font-size: 14px;
}
.pager__link {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 14px;
  color: var(--color-primary);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}
.pager__link.is-disabled { color: var(--color-text-mute); }
.pager__info { color: var(--color-text-soft); }

/* ---------- landing ---------- */
.page--landing { background: linear-gradient(170deg, #eaf1ff 0%, #ffffff 80%); }
.landing { padding: 20px 4px; }
.landing__hero { text-align: center; padding: 28px 12px 18px; }
.landing__logo { width: 72px; height: 72px; border-radius: 18px; box-shadow: var(--color-shadow); }
.landing__title { margin: 14px 0 4px; font-size: 26px; }
.landing__slogan {
  margin: 0;
  font-size: 16px;
  color: var(--color-text);
  font-weight: 500;
  letter-spacing: 0.5px;
}
.landing__sub { margin-top: 6px; color: var(--color-text-soft); font-size: 13px; }

.landing__cta {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  margin-top: 18px;
  padding: 0 20px;
}
.text-link {
  margin-top: 6px;
  color: var(--color-text-soft);
  font-size: 13px;
}

.features {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.features__item {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--color-shadow);
}
.features__icon { font-size: 24px; }
.features__title { font-size: 15px; font-weight: 500; }
.features__desc { font-size: 13px; color: var(--color-text-soft); margin-top: 2px; }

/* ---------- profile / me ---------- */
.profile {
  text-align: center;
  padding: 28px 0 12px;
}
.profile__avatar {
  width: 72px; height: 72px;
  border-radius: 999px;
  margin: 0 auto;
  background: linear-gradient(135deg, #4F8AFB, #2EBD85);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 600;
}
.profile__name { font-size: 18px; font-weight: 600; margin-top: 10px; }
.profile__sub { color: var(--color-text-soft); font-size: 13px; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 18px 0;
}
.stat {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 14px 6px;
  text-align: center;
  box-shadow: var(--color-shadow);
}
.stat__num { font-size: 22px; font-weight: 700; color: var(--color-primary); }
.stat__num--ok   { color: var(--color-success); }
.stat__num--warn { color: var(--color-warn); }
.stat__label { font-size: 12px; color: var(--color-text-soft); margin-top: 4px; }

.menu {
  background: var(--color-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--color-shadow);
}
.menu__item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  min-height: 48px;
}
.menu__item:last-child { border-bottom: none; }
.menu__chev { color: var(--color-text-mute); font-size: 18px; }

.logout { margin-top: 18px; }

/* ---------- error pages ---------- */
.error-page {
  text-align: center;
  padding: 60px 20px;
}
.error-page__code {
  font-size: 64px;
  font-weight: 700;
  color: var(--color-primary);
}
.error-page__title { margin: 4px 0 8px; font-size: 18px; }
.error-page__detail { color: var(--color-text-soft); margin-bottom: 18px; }

/* ---------- prose ---------- */
.prose { font-size: 15px; color: var(--color-text); line-height: 1.8; }
.prose ul { padding-left: 20px; }
.prose .muted { color: var(--color-text-mute); font-size: 13px; }