/* ========== base ========== */
* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

:root {
    --bg-deep: #050506;
    --panel: #17171a;
    --line: #2a2a30;
    --text: #e9e8e8;
    --text-dim: #9a9aa2;
    --text-faint: #66666e;
    --serif: Georgia, "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", serif;
    --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    font-family: var(--sans);
    touch-action: manipulation;
    -webkit-font-smoothing: antialiased;
    background:
        radial-gradient(120% 55% at 50% -5%, rgba(255, 255, 255, 0.05), transparent 60%),
        radial-gradient(90% 45% at 92% 108%, rgba(130, 130, 155, 0.055), transparent 65%),
        var(--bg-deep);
    background-attachment: fixed;
}

::selection {
    background: #3a3a46;
    color: #fff;
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #2c2c34; border-radius: 4px; }

div#content {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 6px 40px;
}

/* ========== title ========== */
div#title {
    font-family: var(--serif);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.35em;
    text-indent: 0.35em;
    text-align: center;
    color: #fff;
    padding: 28px 0 6px;
    animation: fadeDown 0.8s ease both;
}

div#title::after {
    content: "";
    display: block;
    width: 58px;
    height: 1px;
    margin: 16px auto 0;
    background: linear-gradient(90deg, transparent, #7a7a85, transparent);
}

/* ========== fiction / chapter list ========== */
div.fiction-list {
    font-size: 17px;
    padding: 16px 20px;
    margin: 12px 14px 0;
    border: 1px solid var(--line);
    border-left: 3px solid #5b5b66;
    border-radius: 8px;
    background: linear-gradient(180deg, var(--panel), #101013);
    cursor: pointer;
    transition: transform 0.18s ease, border-color 0.18s ease;
}

div.fiction-list:active {
    transform: scale(0.985);
    border-left-color: #c9c9d2;
}

div.chapter-list {
    padding: 6px 14px;
    animation: fadeIn 0.4s ease both;
}

div.chapter-list div {
    padding: 13px 18px;
    margin-top: 2px;
    font-size: 15px;
    color: var(--text-dim);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: color 0.15s ease, padding-left 0.2s ease;
}

div.chapter-list div:active {
    color: #fff;
    padding-left: 28px;
}

/* ========== chapter nav (上一章 / 目录 / 下一章) ========== */
div.opt-container {
    display: flex;
    gap: 12px;
    padding: 20px 16px 8px;
}

div.opt-container div {
    flex: 1;
    padding: 10px 0;
    text-align: center;
    font-size: 14px;
    letter-spacing: 0.2em;
    text-indent: 0.2em;
    color: var(--text-dim);
    text-decoration: none;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.02);
    cursor: pointer;
    user-select: none;
    transition: color 0.18s ease, background 0.18s ease, transform 0.12s ease;
}

div.opt-container div:active {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(1px);
}

/* ========== reading text ========== */
div.text {
    animation: fadeIn 0.5s ease both;
}

div.text div {
    padding: 9px 20px;
    margin-top: 0;
    font-family: var(--serif);
    font-size: 18px;
    line-height: 2.05;
    letter-spacing: 0.02em;
    text-indent: 2em;
    color: #d8d7d4;
}

/* ========== chat messages (blend into reading flow) ========== */
div.chat-msg {
    font-style: italic;
    font-weight: 600;
    color: #c2c1bd;
}

div.chat-msg-img {
    cursor: pointer;
}

span.chat-time-container {
    display: inline-block;
    margin-left: 10px;
    padding: 0;
    font-family: var(--sans);
    font-style: normal;
    font-size: 11px;
    font-weight: 400;
    line-height: 1;
    letter-spacing: 0.03em;
    text-indent: 0;
    color: var(--text-faint);
    vertical-align: middle;
}

img.chat-img {
    display: block;
    width: 100%;
    max-width: 260px;
    margin-top: 10px;
    border-radius: 6px;
    cursor: zoom-in;
    animation: fadeIn 0.3s ease;
}

/* ========== image fullscreen overlay ========== */
div.img-fullscreen-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(0, 0, 0, 0.94);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.25s ease;
    cursor: pointer;
    /* 防止点击穿透触发底层元素 */
    pointer-events: auto;
}

img.img-fullscreen-content {
    max-width: 100vw;
    max-height: 100vh;
    object-fit: contain;
    cursor: zoom-in;
    transition: transform 0.25s ease;
    pointer-events: auto;
}

img.img-fullscreen-content.img-fullscreen-zoomed {
    max-width: none;
    max-height: none;
    object-fit: none;
    cursor: zoom-out;
}

div.img-fullscreen-close {
    position: fixed;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    font-size: 20px;
    font-family: var(--sans);
    line-height: 36px;
    text-align: center;
    color: #fff;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    cursor: pointer;
    z-index: 101;
    user-select: none;
    transition: background 0.2s ease;
}

div.img-fullscreen-close:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ========== floating chat button (invisible, tacit corner tap) ========== */
div.chat-add-control-board {
    position: fixed;
    right: 18px;
    bottom: 18px;
    width: 52px;
    height: 52px;
    z-index: 5;
}

/* ========== chat control panel ========== */
div.chat-control-container {
    position: fixed;
    right: 16px;
    bottom: 84px;
    width: 212px;
    padding: 6px 0 6px;
    background: rgba(22, 22, 26, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid #32323a;
    border-radius: 14px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.6);
    z-index: 6;
    transform-origin: bottom right;
    animation: panelIn 0.28s cubic-bezier(0.2, 0.9, 0.3, 1.2) both;
}

div.chat-control-user-container {
    width: calc(100% - 32px);
    margin: 12px 16px 6px;
    padding: 12px 0 6px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--line);
    border-radius: 10px;
}

div.chat-control-user-container input {
    display: block;
    width: calc(100% - 28px);
    height: 38px;
    margin: 0 auto 8px;
    padding: 0 12px;
    font-size: 14px;
    color: var(--text);
    background: #0e0e11;
    border: 1px solid var(--line);
    border-radius: 8px;
    outline: none;
    vertical-align: top;
    transition: border-color 0.2s ease;
}

div.chat-control-user-container input:focus {
    border-color: #6e6e7c;
}

div.chat-control-user-container input::placeholder {
    color: var(--text-faint);
}

div.chat-control-user-container div {
    display: block;
    width: calc(100% - 28px);
    height: 36px;
    margin: 4px auto 8px;
    font-size: 14px;
    font-weight: 600;
    line-height: 36px;
    letter-spacing: 0.3em;
    text-indent: 0.3em;
    text-align: center;
    color: #0c0c0f;
    background: linear-gradient(180deg, #e8e8ee, #b9b9c4);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.15s ease, filter 0.15s ease;
}

div.chat-control-user-container div:active {
    transform: scale(0.97);
    filter: brightness(0.88);
}

div.chat-control-opt {
    width: calc(100% - 32px);
    height: 40px;
    margin: 10px 16px;
    font-size: 14px;
    letter-spacing: 0.12em;
    line-height: 40px;
    text-align: center;
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--line);
    border-radius: 9px;
    cursor: pointer;
    user-select: none;
    transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease, transform 0.12s ease;
}

div.chat-control-opt:hover {
    color: #fff;
    border-color: #4a4a55;
}

div.chat-control-opt:active {
    transform: scale(0.97);
    background: rgba(255, 255, 255, 0.07);
}

div.chat-control-opt.chat-history-opt,
div.chat-control-opt:has(div.chat-count-selector) {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
}

div.chat-history-label {
    font-size: 14px;
    letter-spacing: 0.12em;
    color: var(--text-dim);
}

div.chat-count-selector {
    display: flex;
    gap: 6px;
}

div.chat-count-chip {
    min-width: 34px;
    height: 26px;
    padding: 0 6px;
    font-size: 12px;
    line-height: 26px;
    text-align: center;
    color: var(--text-dim);
    border: 1px solid var(--line);
    border-radius: 999px;
    transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease, transform 0.12s ease;
}

div.chat-count-chip:active {
    transform: scale(0.9);
}

div.chat-count-chip.active {
    font-weight: 600;
    color: #0c0c0f;
    background: linear-gradient(180deg, #e8e8ee, #b9b9c4);
    border-color: transparent;
}

/* ========== alert box ========== */
div.alert-box {
    position: fixed;
    top: 50%;
    left: 50%;
    width: min(320px, 82vw);
    min-height: 150px;
    padding: 34px 22px 22px;
    height: auto;
    font-size: 16px;
    line-height: 1.7;
    text-align: center;
    color: var(--text);
    background: rgba(26, 26, 31, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid #3a3a44;
    border-radius: 16px;
    box-shadow: 0 0 0 100vmax rgba(0, 0, 0, 0.6), 0 20px 50px rgba(0, 0, 0, 0.5);
    z-index: 20;
    transform: translate(-50%, -50%);
    animation: alertIn 0.3s cubic-bezier(0.2, 0.9, 0.3, 1.15) both;
}

div.alert-box span {
    display: block;
    margin: 0 0 22px;
}

div.alert-box-button {
    position: static;
    width: 100%;
    height: 40px;
    font-size: 14px;
    font-weight: 600;
    line-height: 40px;
    letter-spacing: 0.3em;
    text-indent: 0.3em;
    text-align: center;
    color: #0c0c0f;
    background: linear-gradient(180deg, #e8e8ee, #b9b9c4);
    border: none;
    border-radius: 9px;
    cursor: pointer;
    transition: transform 0.15s ease, filter 0.15s ease;
}

div.alert-box-button:active {
    transform: scale(0.97);
    filter: brightness(0.88);
}

/* ========== quick input bar ========== */
div.chat-input-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 44px;
    font-size: 15px;
    background: rgba(16, 16, 19, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
    z-index: 10;
    animation: slideDown 0.25s ease both;
}

div.chat-input-container input {
    width: 100%;
    height: 100%;
    padding: 0 18px;
    font-size: 15px;
    color: var(--text);
    background: transparent;
    border: none;
    outline: none;
}

/* ========== toast ========== */
div.toast-msg {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 12px 28px;
    font-size: 14px;
    color: #fff;
    background: rgba(0, 0, 0, 0.78);
    border-radius: 8px;
    z-index: 25;
    pointer-events: none;
    animation: fadeIn 0.2s ease;
}

/* ========== misc ========== */
div.bottom-placer {
    width: 100%;
    height: 60px;
}

/* ========== keyframes ========== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: none; }
}

@keyframes panelIn {
    from { opacity: 0; transform: translateY(12px) scale(0.92); }
    to { opacity: 1; transform: none; }
}

@keyframes alertIn {
    from { opacity: 0; transform: translate(-50%, -46%) scale(0.9); }
    to { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

@keyframes slideDown {
    from { transform: translateY(-100%); }
    to { transform: none; }
}