/*
 * theme-v2.css
 * 字卡系统 · Rain & Fog 设计系统基础层
 * 包含：变量 / 背景 / 卡片 / 场景 / 按钮 / 输入
 */

/* ========== [1] CSS 变量 ========== */
:root {
    --env-deep: #b0bfcc;
    --env: #c9d6e2;
    --env-mid: #d8e1ea;
    --env-light: #e7edf2;
    --paper: #f0f3f6;
    --paper-trans: rgba(248,250,252,0.12);
    --paper-trans-2: rgba(248,250,252,0.22);
    --ink-deep: #1f2d3a;
    --ink: #2e3d4d;
    --ink-soft: #5a6b7c;
    --ink-faded: #8694a3;
    --ink-ghost: #b6c0cb;
    --rain-red: #b94a4a;
    --rain-red-deep: #8a3535;
    --rain-red-soft: rgba(185,74,74,0.10);
    --rain-pink: #d68a8a;
    --rain-pink-soft: rgba(214,138,138,0.18);
    --line-strong: rgba(31,45,58,0.32);
    --line: rgba(31,45,58,0.18);
    --line-faint: rgba(31,45,58,0.08);
    --line-hair: rgba(31,45,58,0.04);
    --font-cn: 'Noto Serif SC', serif;
    --font-en: 'EB Garamond', serif;
    --font-script: 'Caveat', cursive;
    --font-mono: 'JetBrains Mono', monospace;

    --sp-1: 4px;
    --sp-2: 8px;
    --sp-3: 12px;
    --sp-4: 16px;
    --sp-5: 24px;
    --sp-6: 32px;
    --sp-7: 48px;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 14px;
}

/* ========== [2] 全局重置 + body 背景 ========== */
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
}

html, body { 
    background: var(--env); 
    font-family: var(--font-cn); 
    color: var(--ink); 
    line-height: 1.6; 
    min-height: 100vh; 
}

body {
    background:
        radial-gradient(ellipse at 30% 20%, rgba(248,250,252,0.4) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 75%, rgba(176,191,204,0.3) 0%, transparent 60%),
        url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.12 0 0 0 0 0.18 0 0 0 0 0.23 0 0 0 0.06 0'/></filter><rect width='240' height='240' filter='url(%23n)'/></svg>"),
        var(--env);
    background-size: 100% 100%, 100% 100%, 240px 240px, 100% 100%;
}

body::before {
    content: ''; 
    position: fixed; 
    inset: 0;
    background-image: repeating-linear-gradient(102deg, transparent 0, transparent 88px, rgba(31,45,58,0.012) 88px, rgba(31,45,58,0.012) 89px);
    pointer-events: none; 
    z-index: 1;
}

/* ========== [3] 卡片容器 ========== */
.card {
    background: var(--paper-trans);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: var(--sp-5);
    box-shadow: 0 4px 12px var(--line-hair);
    position: relative;
    z-index: 2;
}

.card.card--accent {
    border-color: var(--rain-red-soft);
    box-shadow: inset 3px 0 0 var(--rain-red), 0 4px 12px var(--line-hair);
}

.card.card--quiet {
    background: transparent;
    border-color: var(--line-faint);
    box-shadow: none;
}

/* ========== [4] 场景分块 ========== */
.scene-section { 
    margin-bottom: 60px; 
    position: relative; 
    z-index: 2; 
}

.scene-label { 
    display: flex; 
    align-items: flex-end; 
    gap: 14px; 
    border-bottom: 1px solid var(--line); 
    padding-bottom: 8px; 
    margin-bottom: 22px; 
}

.scene-num { 
    font-family: var(--font-en); 
    font-style: italic; 
    font-size: 30px; 
    color: var(--ink-faded); 
    line-height: 1; 
}

.scene-cn { 
    font-family: var(--font-cn); 
    font-weight: 500; 
    font-size: 16px; 
    letter-spacing: 0.3em; 
    color: var(--ink-deep); 
}

.scene-en { 
    font-family: var(--font-en); 
    font-size: 11px; 
    letter-spacing: 0.25em; 
    text-transform: uppercase; 
    color: var(--ink-soft); 
    margin-left: auto; 
    font-style: italic; 
}

.scene-tag { 
    display: inline-block; 
    border: 1px solid var(--rain-red); 
    color: var(--rain-red); 
    font-family: var(--font-en); 
    font-style: italic; 
    font-size: 10px; 
    padding: 2px 8px; 
    letter-spacing: 0.2em; 
    background: var(--rain-red-soft); 
}

/* ========== [5] 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-cn);
    font-weight: 500;
    letter-spacing: 0.1em;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--ink);
    padding: var(--sp-2) var(--sp-4);
    cursor: pointer;
    outline: none;
}

.btn.btn--primary {
    border-color: var(--rain-red);
    color: var(--rain-red);
}

.btn.btn--primary:hover {
    background: var(--rain-red-soft);
}

.btn.btn--ghost {
    border-color: transparent;
    color: var(--ink-soft);
}

.btn.btn--ghost:hover {
    background: var(--paper-trans);
    color: var(--ink-deep);
}

.btn.btn--icon {
    width: 36px;
    height: 36px;
    padding: 0;
    flex-shrink: 0;
}

/* ========== [6] 输入控件 ========== */
.input,
.textarea {
    width: 100%;
    background: var(--line-hair);
    border: 1px solid var(--line-faint);
    font-family: var(--font-cn);
    padding: var(--sp-3) var(--sp-4);
    border-radius: var(--radius-sm);
    color: var(--ink-deep);
    outline: none;
    transition: border-color 0.2s ease;
    box-shadow: none;
}

.input:focus,
.textarea:focus {
    border-color: var(--line);
    background: transparent;
}

.input::placeholder,
.textarea::placeholder {
    color: var(--ink-faded);
}

.textarea {
    resize: vertical;
    min-height: 80px;
}
/* ========== [7] 装饰原语 · Decoration Primitives ========== */
/* -- 用法：这些是工具类（utility classes）。
   -- 不会自动生效，需要在 HTML 里手动加 <div class="rain-layer"></div> 才显示。
   -- 后续 D1.2/D1.3/D1.4 都会调用这里的类。
   -- 所有装饰层都 pointer-events: none，不会干扰交互。
*/

/* ----- [7.1] 雾感叠加层 ----- */
/* 用法：在需要"有雾"的容器（position:relative）内放 <div class="fog-layer"></div> */
.fog-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    mix-blend-mode: screen;
    background:
        radial-gradient(ellipse at 25% 15%, rgba(255,255,255,0.18) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 85%, rgba(255,255,255,0.12) 0%, transparent 55%),
        radial-gradient(ellipse at 60% 40%, rgba(255,255,255,0.08) 0%, transparent 70%);
}

/* ----- [7.2] 雨痕动画层 ----- */
/* 用法：在容器内放 <div class="rain-layer"></div>，三道竖向雨痕缓慢下移 */
.rain-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    mix-blend-mode: screen;
    opacity: 0.55;
    background-image:
        linear-gradient(180deg, transparent 0%, rgba(255,255,255,0.10) 12%, rgba(255,255,255,0.04) 28%, transparent 45%),
        linear-gradient(180deg, transparent 8%, rgba(255,255,255,0.08) 22%, transparent 50%),
        linear-gradient(180deg, transparent 15%, rgba(255,255,255,0.06) 35%, rgba(255,255,255,0.02) 60%, transparent 75%);
    background-size: 2px 60%, 1px 50%, 3px 70%;
    background-position: 18% 0, 42% 0, 78% 0;
    background-repeat: no-repeat;
    animation: rain-drip 18s ease-in-out infinite;
}
@keyframes rain-drip {
    0%, 100% { background-position: 18% 0, 42% 0, 78% 0; opacity: 0.45; }
    50%      { background-position: 18% 30px, 42% 50px, 78% 20px; opacity: 0.65; }
}

/* ----- [7.3] 玻璃水珠 ----- */
/* 用法：<span class="droplet" style="left:25%;top:30%;width:14px;height:14px;"></span> */
.droplet {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: 3;
    background: radial-gradient(
        circle at 30% 30%,
        rgba(255,255,255,0.6) 0%,
        rgba(255,255,255,0.15) 30%,
        rgba(31,45,58,0.1) 60%,
        transparent 100%
    );
    box-shadow:
        inset -1px -1px 2px rgba(31,45,58,0.15),
        1px 1px 2px rgba(255,255,255,0.3);
}

/* ----- [7.4] 漂浮光点 ----- */
/* 用法：<span class="bokeh" style="left:40%;top:60%;animation-delay:1s;"></span> */
.bokeh {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    pointer-events: none;
    z-index: 3;
    background: radial-gradient(circle, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
    animation: drift-up 8s ease-in-out infinite;
}
@keyframes drift-up {
    0%   { transform: translateY(0) translateX(0); opacity: 0; }
    20%  { opacity: 0.6; }
    100% { transform: translateY(-60px) translateX(20px); opacity: 0; }
}

/* ----- [7.5] 雨滴涟漪 ----- */
/* 用法：<span class="ripple" style="left:50%;top:50%;width:30px;height:30px;"></span> */
.ripple {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(31,45,58,0.32);
    pointer-events: none;
    animation: ripple-pulse 4s ease-out infinite;
}
.ripple::before,
.ripple::after {
    content: '';
    position: absolute;
    inset: -10px;
    border-radius: 50%;
    border: 1px solid rgba(31,45,58,0.18);
}
.ripple::after {
    inset: -22px;
    border-color: rgba(31,45,58,0.10);
}
@keyframes ripple-pulse {
    0%   { transform: scale(0.8); opacity: 0; }
    25%  { opacity: 0.45; }
    100% { transform: scale(1.6); opacity: 0; }
}

/* ----- [7.6] 十字星光 ----- */
/* 用法：<span class="sparkle" style="left:30%;top:40%;animation-delay:0.5s;"></span> */
.sparkle {
    position: absolute;
    width: 14px;
    height: 14px;
    pointer-events: none;
    animation: twinkle 3s ease-in-out infinite;
}
.sparkle::before,
.sparkle::after {
    content: '';
    position: absolute;
    background: linear-gradient(transparent, white, transparent);
}
.sparkle::before {
    width: 1px;
    height: 100%;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
}
.sparkle::after {
    width: 100%;
    height: 1px;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}
@keyframes twinkle {
    0%, 100% { opacity: 0; transform: scale(0.6) rotate(0deg); }
    50%      { opacity: 1; transform: scale(1) rotate(45deg); }
}

/* ----- [7.7] 大字背景水印 ----- */
/* 用法：<span class="bg-big" style="top:20px;right:30px;font-size:120px;">RAIN</span>
   -- 用于把英文大字斜印在某个区域作为背景装饰 */
.bg-big {
    position: absolute;
    pointer-events: none;
    user-select: none;
    font-family: var(--font-en);
    font-style: italic;
    font-weight: 500;
    color: rgba(75,95,115,0.09);
    z-index: 1;
    line-height: 0.85;
    white-space: nowrap;
    letter-spacing: -0.02em;
}

/* ----- [7.8] 横向分隔条（带居中圆点） ----- */
/* 用法：<div class="h-bar"><span class="h-title">字 卡</span><span class="h-en">card</span></div> */
.h-bar {
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
    padding: 18px 0;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    position: relative;
}
.h-bar::before {
    content: '· · · · · · · · ·';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--ink-faded);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.4em;
    background: var(--env);
    padding: 0 14px;
}

/* ----- [7.9] 注脚条（左红边引言） ----- */
/* 用法：<div class="note-strip"><span class="en">NOTE</span>梦角今日心情低落</div> */
.note-strip {
    border-left: 2px solid var(--rain-red);
    padding: 6px 14px;
    background: var(--paper-trans);
    font-family: var(--font-cn);
    font-size: 12px;
    color: var(--ink-soft);
    margin: 16px 0;
    line-height: 1.7;
}
.note-strip .en {
    font-family: var(--font-en);
    font-style: italic;
    color: var(--rain-red);
    letter-spacing: 0.15em;
    font-size: 11px;
    margin-right: 8px;
    text-transform: uppercase;
}

/* ----- [7.10] 虚线分隔器（消息流分日） ----- */
/* 用法：<div class="stream-divider"><span>2026.05.07 · 周四</span></div> */
.stream-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--ink-faded);
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.3em;
    padding: var(--sp-3) 0;
}
.stream-divider::before,
.stream-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: radial-gradient(circle, var(--line) 1px, transparent 1.5px) repeat-x;
    background-size: 6px 1px;
}

/* ========== [7] 装饰原语 段落结束 ========== */