/* ============================================================
 * 一念 · 共享 Modal / Overlay / Toast / Banner 视觉系统
 *
 * 设计目标：
 *   - 服务于 50 岁大陆用户，字大、对比清、按钮高
 *   - 金色 (#e8c86b) on 深色 (#08080c) 文雅基调
 *   - 衬线中文（霞鹜文楷 / Noto Serif SC）
 *   - iOS 安全区、动效克制、减少动画可访问
 * ============================================================ */

:root {
  --yn-gold: #e8c86b;
  --yn-gold-soft: rgba(232, 200, 107, 0.78);
  --yn-gold-dim: rgba(232, 200, 107, 0.35);
  --yn-bg: #08080c;
  --yn-card-bg: rgba(35, 30, 25, 0.95);
  --yn-backdrop: rgba(8, 8, 12, 0.88);
  --yn-serif: 'LXGW WenKai', 'Noto Serif SC', 'Songti SC', serif;
  --yn-radius: 18px;
  --yn-radius-pill: 999px;
  --yn-tap: 48px;
}

/* ============================================================
 * 1. Overlay 基础（全屏遮罩 + 居中卡片）
 * ============================================================ */
.yn-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: var(--yn-backdrop, rgba(8, 8, 12, 0.88));
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  padding: 0;
  animation: yn-fade-in 0.28s ease-out both;
  overscroll-behavior: contain;
}

@media (min-width: 640px) {
  .yn-overlay {
    align-items: center;
    padding: 24px;
  }
}

.yn-overlay-closing {
  animation: yn-fade-out 0.2s ease-in forwards;
}

.yn-overlay-card {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  background: var(--yn-card-bg, rgba(35, 30, 25, 0.95));
  border: 1px solid var(--yn-gold-dim, rgba(232, 200, 107, 0.35));
  border-bottom: 0;
  border-radius: 18px 18px 0 0;
  padding: 28px 24px calc(24px + env(safe-area-inset-bottom, 0px));
  font-family: var(--yn-serif);
  color: #f2e9d4;
  box-shadow: 0 -12px 48px rgba(0, 0, 0, 0.55);
  animation: yn-slide-up 0.4s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@media (min-width: 640px) {
  .yn-overlay-card {
    border-bottom: 1px solid var(--yn-gold-dim, rgba(232, 200, 107, 0.35));
    border-radius: var(--yn-radius, 18px);
    padding: 28px;
  }
}

/* ============================================================
 * 2. Overlay Header / Body / Footer
 * ============================================================ */
.yn-overlay-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding-top: env(safe-area-inset-top, 0);
}

.yn-overlay-back {
  flex: 0 0 auto;
  width: var(--yn-tap);
  height: var(--yn-tap);
  min-width: var(--yn-tap);
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--yn-gold-dim);
  color: var(--yn-gold);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  font-family: var(--yn-serif);
  transition: background 0.2s ease;
}
.yn-overlay-back:active { background: rgba(232, 200, 107, 0.1); }

.yn-overlay-title {
  flex: 1 1 auto;
  margin: 0;
  text-align: center;
  font-family: var(--yn-serif);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--yn-gold);
  letter-spacing: 0.04em;
}

.yn-overlay-header-spacer {
  flex: 0 0 var(--yn-tap);
  display: inline-block;
}

.yn-overlay-subtitle {
  margin: 0 0 20px;
  text-align: center;
  color: var(--yn-gold-soft);
  font-size: 0.95rem;
  line-height: 1.6;
}

.yn-overlay-body {
  flex: 1 1 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 4px 2px 16px;
  font-size: 1rem;
  line-height: 1.7;
}

.yn-overlay-footer {
  position: sticky;
  bottom: 0;
  display: flex;
  gap: 12px;
  padding-top: 16px;
  margin-top: 8px;
  background: linear-gradient(to top, var(--yn-card-bg) 70%, transparent);
}

.yn-overlay-footer > * { flex: 1 1 0; }

/* ============================================================
 * 3. 按钮基础
 * ============================================================ */
.yn-btn-primary,
.yn-btn-secondary,
.yn-btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--yn-tap);
  padding: 0 24px;
  border-radius: var(--yn-radius-pill);
  font-family: var(--yn-serif);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  cursor: pointer;
  user-select: none;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
}

.yn-btn-primary {
  background: var(--yn-gold);
  color: #2a1f10;
  border: 1px solid var(--yn-gold);
  box-shadow: 0 4px 16px rgba(232, 200, 107, 0.18);
}
.yn-btn-primary:active { transform: scale(0.97); background: #d9b858; }

.yn-btn-secondary {
  background: transparent;
  color: var(--yn-gold);
  border: 1px solid var(--yn-gold);
}
.yn-btn-secondary:active {
  transform: scale(0.97);
  background: rgba(232, 200, 107, 0.12);
}

.yn-btn-ghost {
  background: transparent;
  color: var(--yn-gold-soft);
  border: 1px solid transparent;
  min-height: 40px;
  padding: 0 12px;
}
.yn-btn-ghost:active { color: var(--yn-gold); }

/* ============================================================
 * 4. Toast
 * ============================================================ */
.yn-toast {
  position: fixed;
  top: calc(16px + env(safe-area-inset-top, 0));
  left: 50%;
  transform: translateX(-50%);
  z-index: 1100;
  padding: 12px 24px;
  max-width: 85vw;
  background: rgba(40, 32, 20, 0.96);
  color: var(--yn-gold);
  font-family: var(--yn-serif);
  font-size: 0.95rem;
  border: 1px solid var(--yn-gold-dim);
  border-radius: var(--yn-radius-pill);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  animation: yn-toast-in 0.32s cubic-bezier(0.16, 1, 0.3, 1) both;
  pointer-events: none;
}

.yn-toast-leaving { animation: yn-toast-out 0.26s ease-in forwards; }

/* ============================================================
 * 5. 海报预览 Modal
 * ============================================================ */
.yn-poster-modal {
  align-items: center;
  padding: 0;
}

.yn-poster-card {
  position: relative;
  width: 100%;
  max-width: 640px;
  max-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: calc(48px + env(safe-area-inset-top, 0)) 16px
           calc(32px + env(safe-area-inset-bottom, 0));
  gap: 16px;
  animation: yn-slide-up 0.42s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.yn-poster-img {
  display: block;
  max-width: 90vw;
  max-height: 70vh;
  width: auto;
  height: auto;
  border-radius: 14px;
  border: 1px solid var(--yn-gold-dim);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.6);
}

.yn-poster-hint {
  margin: 0;
  color: var(--yn-gold-soft);
  font-family: var(--yn-serif);
  font-size: 0.95rem;
  text-align: center;
  letter-spacing: 0.05em;
}

.yn-poster-download {
  min-width: 200px;
}

.yn-poster-close {
  position: absolute;
  top: calc(16px + env(safe-area-inset-top, 0));
  right: 16px;
  width: var(--yn-tap);
  height: var(--yn-tap);
  padding: 0;
  font-size: 28px;
  color: var(--yn-gold);
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--yn-gold-dim);
  border-radius: 50%;
}

/* ============================================================
 * 6. Bell Modal 内部元素
 * ============================================================ */
.yn-bell-card .yn-overlay-body { padding-bottom: 8px; }

.yn-bell-toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 4px;
  border-top: 1px solid var(--yn-gold-dim);
  border-bottom: 1px solid var(--yn-gold-dim);
  margin-bottom: 20px;
}

.yn-bell-toggle-label {
  font-family: var(--yn-serif);
  font-size: 1.05rem;
  color: var(--yn-gold);
}

.yn-bell-toggle {
  position: relative;
  width: 56px;
  height: 32px;
  border-radius: 999px;
  border: 1px solid var(--yn-gold-dim);
  background: rgba(232, 200, 107, 0.1);
  cursor: pointer;
  transition: background 0.25s ease, border-color 0.25s ease;
  padding: 0;
}

.yn-bell-toggle.is-on {
  background: var(--yn-gold);
  border-color: var(--yn-gold);
}

.yn-bell-toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #f5ecd1;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.yn-bell-toggle.is-on .yn-bell-toggle-thumb { transform: translateX(24px); }

.yn-bell-time-label {
  margin: 4px 0 12px;
  color: var(--yn-gold-soft);
  font-size: 0.95rem;
}

.yn-bell-hour-chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.yn-bell-hour-chips::-webkit-scrollbar { display: none; }

.yn-bell-hour-chip {
  flex: 0 0 auto;
  min-width: 74px;
  min-height: 44px;
  padding: 0 14px;
  border-radius: var(--yn-radius-pill);
  background: transparent;
  border: 1px solid var(--yn-gold-dim);
  color: var(--yn-gold-soft);
  font-family: var(--yn-serif);
  font-size: 0.95rem;
  cursor: pointer;
  scroll-snap-align: center;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.yn-bell-hour-chip.is-active {
  background: var(--yn-gold);
  color: #2a1f10;
  border-color: var(--yn-gold);
}

.yn-bell-hint {
  margin: 16px 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--yn-gold-soft);
  padding: 12px 14px;
  background: rgba(232, 200, 107, 0.06);
  border-left: 2px solid var(--yn-gold-dim);
  border-radius: 8px;
}

/* 功能介绍块：点开"每日提醒"先讲清这功能是干啥的 */
.yn-bell-intro {
  margin: 0 0 18px;
  padding: 14px 16px;
  background: rgba(232, 200, 107, 0.08);
  border: 1px solid var(--yn-gold-dim);
  border-radius: 12px;
}
.yn-bell-intro-title {
  margin: 0 0 8px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--yn-gold-soft);
}
.yn-bell-intro-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--yn-gold-soft);
}

/* ============================================================
 * 7. 晨钟 Banner（顶部提醒）
 * ============================================================ */
.yn-bell-banner-slot {
  position: sticky;
  top: 0;
  z-index: 900;
  pointer-events: none;
}

.yn-bell-banner {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  margin: calc(8px + env(safe-area-inset-top, 0)) 12px 0;
  padding: 12px 14px;
  background: rgba(35, 30, 25, 0.96);
  border: 1px solid var(--yn-gold);
  border-radius: 14px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
  font-family: var(--yn-serif);
  color: var(--yn-gold);
  animation: yn-slide-down-banner 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.yn-bell-banner-leaving {
  animation: yn-slide-up-banner 0.26s ease-in forwards;
}

.yn-bell-banner-text {
  flex: 1 1 auto;
  font-size: 0.95rem;
  line-height: 1.5;
  min-width: 0;
}

.yn-bell-banner-draw {
  flex: 0 0 auto;
  min-height: 40px;
  padding: 0 16px;
  font-size: 0.9rem;
}

.yn-bell-banner-close {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--yn-gold-soft);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  border-radius: 50%;
}
.yn-bell-banner-close:active { background: rgba(232, 200, 107, 0.12); }

/* ============================================================
 * 8. Keyframes
 * ============================================================ */
@keyframes yn-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes yn-fade-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

@keyframes yn-slide-up {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes yn-slide-down-banner {
  from { opacity: 0; transform: translateY(-120%); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes yn-slide-up-banner {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-120%); }
}

@keyframes yn-toast-in {
  from { opacity: 0; transform: translate(-50%, -16px); }
  to   { opacity: 1; transform: translate(-50%, 0); }
}

@keyframes yn-toast-out {
  from { opacity: 1; transform: translate(-50%, 0); }
  to   { opacity: 0; transform: translate(-50%, -16px); }
}

/* ============================================================
 * 9. Reduced motion
 * ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .yn-overlay,
  .yn-overlay-closing,
  .yn-overlay-card,
  .yn-poster-card,
  .yn-toast,
  .yn-toast-leaving,
  .yn-bell-banner,
  .yn-bell-banner-leaving,
  .yn-btn-primary,
  .yn-btn-secondary,
  .yn-btn-ghost,
  .yn-bell-toggle-thumb,
  .yn-bell-hour-chip {
    animation: none !important;
    transition: none !important;
  }
  .yn-btn-primary:active,
  .yn-btn-secondary:active {
    transform: none !important;
  }
}