/* ============================================
   暖光 · 全局样式
   极简、克制、无声的设计语言
   ============================================ */

/* ── 基础重置 ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  font-size: 16px;
}

body {
  font-family: var(--font-stack);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: var(--line-height-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
  min-height: 100dvh;
}

/* ── App容器 ── */
.app-container {
  max-width: 430px;
  margin: 0 auto;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}

/* ── 屏幕容器 ── */
.screen {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding-bottom: calc(var(--spacing-nav-height) + var(--spacing-safe-bottom));
  display: none;
  animation: none;
}

.screen.active {
  display: flex;
  flex-direction: column;
}

/* ── 底部导航 ── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: var(--spacing-nav-height);
  background: var(--color-bg-nav);
  border-top: 1px solid var(--color-border-nav);
  display: flex;
  justify-content: space-around;
  align-items: flex-start;
  padding-top: 10px;
  padding-bottom: var(--spacing-safe-bottom);
  z-index: 100;
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--color-text-nav);
  font-family: var(--font-stack);
  font-size: var(--font-size-nav);
  padding: 0;
  transition: color 0.15s ease;
  -webkit-tap-highlight-color: transparent;
  position: relative;
}

.nav-item .nav-icon {
  width: var(--nav-icon-size);
  height: var(--nav-icon-size);
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-item .nav-icon svg {
  width: 100%;
  height: 100%;
}

.nav-item.active {
  color: var(--color-text-nav-active);
}

.nav-item.active .nav-icon svg {
  transform: scale(1.08);
  transition: transform 0.2s ease;
}

/* 写按钮特殊样式 */
.nav-item.nav-write .nav-icon {
  width: var(--write-btn-size);
  height: var(--write-btn-size);
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: -8px;
}

.nav-item.nav-write .nav-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-white);
}

.nav-item.nav-write.active .nav-icon {
  background: var(--color-primary-press);
}

/* ── 红点 ── */
.nav-badge {
  position: absolute;
  top: 2px;
  right: -8px;
  width: 8px;
  height: 8px;
  background: #E85D5D;
  border-radius: 50%;
  display: none;
}

.nav-badge.show {
  display: block;
}

/* ── Toast ── */
.toast {
  position: fixed;
  top: 20%;
  left: 50%;
  transform: translate(-50%, 0);
  background: var(--color-bg-toast);
  color: var(--color-white);
  font-size: var(--font-size-toast);
  padding: 10px 24px;
  border-radius: var(--radius-toast);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-toast) ease;
  box-shadow: var(--shadow-toast);
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
}

/* ── 模态遮罩 ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-modal);
  width: var(--modal-width);
  padding: 32px 28px;
  transform: translateY(20px);
  transition: transform 0.3s ease;
}

.modal-overlay.show .modal-card {
  transform: translateY(0);
}

/* ── 通用按钮 ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: var(--font-size-body);
  border: none;
  border-radius: var(--radius-button);
  padding: 14px 24px;
  cursor: pointer;
  font-family: var(--font-stack);
  transition: background 0.15s ease, transform var(--duration-press) ease;
  -webkit-tap-highlight-color: transparent;
  width: 100%;
}

.btn-primary:active {
  background: var(--color-primary-press);
  transform: scale(0.97);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-primary);
  font-size: var(--font-size-body);
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-button);
  padding: 12px 24px;
  cursor: pointer;
  font-family: var(--font-stack);
  transition: background 0.15s ease, transform var(--duration-press) ease;
  -webkit-tap-highlight-color: transparent;
}

.btn-ghost:active {
  background: var(--color-primary-ghost);
  transform: scale(0.97);
}

/* ── 空状态 ── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 32px;
  text-align: center;
  color: var(--color-text-meta);
  flex: 1;
  min-height: 300px;
}

.empty-state .empty-icon {
  font-size: 40px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state .empty-text {
  font-size: 15px;
  line-height: 1.8;
  max-width: 240px;
}

/* ── 页面标题 ── */
.page-title {
  font-size: var(--font-size-title);
  color: var(--color-text);
  font-weight: 400;
  padding: 32px var(--spacing-page) 20px;
  letter-spacing: 0.5px;
}

/* ── 滑动禁止 ── */
.no-scroll {
  overflow: hidden;
}

/* ── 响应式 ── */
@media (min-width: 431px) {
  .app-container {
    height: 100vh;
    height: 100dvh;
    border-left: 1px solid var(--color-border-nav);
    border-right: 1px solid var(--color-border-nav);
  }
}