/* ===================================================================
   跨越时差的信箱 · 粉色主题（前台 + 安装页）
   布局：顶部标题 / 中部留言滚动区 / 底部固定输入框 / 背景漂浮物
   =================================================================== */

:root {
    --primary: #ec4899;
    --primary-dark: #db2777;
    --primary-light: #fce7f3;
    --bg: #fff5fa;
    --card: #ffffff;
    --text: #432b3a;
    --muted: #b48ea2;
    --border: #f9d5e5;
    --danger: #ef4444;
    --success: #db2777;
    --radius: 14px;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;

    /* 整页固定高度：留言区滚动，输入框钉在底部 */
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow: hidden;

    background: linear-gradient(180deg, #ffe1ef 0%, #fff5fa 45%, #ffe9f4 100%);
    background-attachment: fixed;
}

/* ---------- 漂浮物层 ---------- */
.float-layer {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.float-item {
    position: absolute;
    bottom: -50px;
    line-height: 1;
    animation: floatUp linear infinite;
    will-change: transform;
    user-select: none;
    text-shadow: 0 2px 8px rgba(236, 72, 153, .15);
}

@keyframes floatUp {
    0%   { transform: translateY(0) rotate(-10deg); }
    50%  { transform: translateY(-56vh) rotate(10deg); }
    100% { transform: translateY(-115vh) rotate(-6deg); }
}

@media (prefers-reduced-motion: reduce) {
    .float-item { animation: none; display: none; }
}

/* ---------- 顶部标题（透底，让漂浮物从文字后飘过） ---------- */
.site-header {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    text-align: center;
    padding: 26px 16px 14px;
}

.site-header h1 {
    margin: 0;
    font-size: 26px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--primary-dark);
}

.site-header p {
    margin: 6px 0 0;
    font-size: 14px;
    color: var(--muted);
}

/* ---------- 中部：留言滚动区 ---------- */
.chat-scroll {
    position: relative;
    z-index: 1;
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    padding: 6px 16px 18px;
}

.list-heading {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary-dark);
    margin: 10px 2px 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.count-badge {
    background: var(--primary-light);
    color: var(--primary-dark);
    font-size: 12px;
    font-weight: 700;
    border-radius: 999px;
    padding: 2px 12px;
}

/* 正序 / 倒序切换（单按钮：↓ 最新在前，↑ 最早在前） */
.sort-toggle {
    margin-left: auto;
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 2px 6px rgba(244, 114, 182, 0.35);
    transition: transform 0.15s ease;
}

.sort-toggle:hover { transform: scale(1.1); }

.sort-toggle.asc { background: #fff; color: var(--primary); border: 1px solid var(--primary); }

/* 气泡卡片 */
.message-card {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    margin-bottom: 14px;
}

.avatar {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bubble {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 4px var(--radius) var(--radius) var(--radius);
    padding: 12px 16px;
    max-width: calc(100% - 52px);
    box-shadow: 0 2px 10px rgba(236, 72, 153, .06);
}

/* 老婆 · 粉色气泡 */
.who-pink .avatar { background: linear-gradient(135deg, #f472b6, #ec4899); box-shadow: 0 3px 8px rgba(236, 72, 153, .25); }
.who-pink .nickname { color: var(--primary); }
.who-pink .bubble { border-color: #f9c7dd; background: #fff7fb; }

/* 老公 · 蓝色气泡 */
.who-blue .avatar { background: linear-gradient(135deg, #60a5fa, #2563eb); box-shadow: 0 3px 8px rgba(37, 99, 235, .25); }
.who-blue .nickname { color: #2563eb; }
.who-blue .bubble { border-color: #c7dbfa; background: #f8fbff; }

.message-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 4px;
    flex-wrap: wrap;
}

.nickname {
    font-weight: 700;
    color: var(--primary);
}

.message-time {
    font-size: 12px;
    color: var(--muted);
}

.message-content {
    color: var(--text);
    font-size: 15px;
    word-break: break-word;
}

.empty-tip {
    text-align: center;
    color: var(--muted);
    padding: 46px 0;
    font-size: 15px;
}

/* ---------- 提示 ---------- */
.alert {
    border-radius: 10px;
    padding: 11px 16px;
    margin: 10px 0 14px;
    font-size: 14px;
    border: 1px solid transparent;
}

.alert-success {
    background: #fdeaf1;
    border-color: #f9c7dd;
    color: var(--primary-dark);
}

.alert-error {
    background: #fef2f2;
    border-color: #fecaca;
    color: #b91c1c;
}

/* ---------- 分页 ---------- */
.pagination {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin: 20px 0 8px;
    flex-wrap: wrap;
}

.pagination a,
.pagination .current {
    min-width: 38px;
    padding: 8px 12px;
    text-align: center;
    border-radius: 999px;
    font-size: 14px;
    text-decoration: none;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--primary-dark);
}

.pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.pagination .current {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ---------- 底部固定输入框 ---------- */
.composer {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    background: #fff;
    border-top: 1px solid var(--border);
    box-shadow: 0 -4px 16px rgba(236, 72, 153, .10);
    padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
}

.gb-form {
    max-width: 720px;
    margin: 0 auto;
}

.gb-form .text-input { margin-bottom: 10px; }

.hp-field {
    position: absolute;
    left: -9999px;
    top: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.text-input {
    width: 100%;
    padding: 10px 14px;
    font-size: 15px;
    font-family: inherit;
    color: var(--text);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    outline: none;
    transition: border-color .15s, box-shadow .15s;
}

.text-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(236, 72, 153, .14);
}

textarea.text-input {
    resize: none;
    min-height: 52px;
    line-height: 1.5;
}

.form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.char-count {
    font-size: 12px;
    color: var(--muted);
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block;
    padding: 10px 26px;
    font-size: 15px;
    font-weight: 700;
    font-family: inherit;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    transition: background .15s;
}

.btn-primary {
    background: linear-gradient(135deg, #f472b6, #ec4899);
    color: #fff;
    box-shadow: 0 3px 10px rgba(236, 72, 153, .3);
}

.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { background: #f5b8d5; cursor: not-allowed; box-shadow: none; }

.btn-ghost {
    background: #fdf2f8;
    color: var(--primary-dark);
}
.btn-ghost:hover { background: var(--primary-light); }

.btn-block { width: 100%; }

/* ===================================================================
   安装向导页（同一粉色主题）
   =================================================================== */
.install-page {
    display: block;
    height: auto;
    overflow: auto;
    background: var(--bg);
    padding: 40px 16px;
}

.install-box {
    max-width: 520px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px 32px;
    box-shadow: 0 4px 20px rgba(236, 72, 153, .08);
}

.install-box h1 {
    margin: 0 0 4px;
    font-size: 22px;
    text-align: center;
    color: var(--primary-dark);
}

.install-tip {
    text-align: center;
    color: var(--muted);
    font-size: 14px;
    margin: 0 0 20px;
}

.install-box fieldset {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 8px 18px 18px;
    margin: 0 0 18px;
}

.install-box legend {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    padding: 0 6px;
}

.install-box label {
    display: block;
    margin: 12px 0 5px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.install-box input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
}

.install-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(236, 72, 153, .14);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.install-box code {
    background: #fdf2f8;
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 13px;
    color: var(--primary-dark);
}

.alert-success ol { margin: 8px 0 0; padding-left: 20px; }

/* ---------- 小屏 ---------- */
@media (max-width: 520px) {
    .form-actions { flex-direction: column; }
    .site-header h1 { font-size: 22px; }
    .site-header { padding-top: 18px; }
    .bubble { max-width: 100%; }
}