/* ==========================================================================
   Paperland 绘岛 · 下载页样式
   设计基调：纸感留白 + 墨色排版 + 竹青点缀，浅色/深色自动适配
   ========================================================================== */

:root {
  --paper:      #FAFAF7;
  --card:       #FFFFFF;
  --card-hover: #FCFCFA;
  --ink:        #16181D;
  --ink-soft:   #3D4149;
  --muted:      #7A8290;
  --line:       #E8E6E0;
  --line-soft:  #F1EFEA;
  --accent:     #2E6B5A;
  --accent-dim: #E7F0EC;
  --danger:     #B4453A;
  --radius:     16px;
  --shadow:     0 1px 2px rgba(20, 24, 28, .04), 0 12px 32px -12px rgba(20, 24, 28, .16);
  --font-sans:  -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
                "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Georgia, "Songti SC", "SimSun", serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #0E1014;
    --card:       #171A20;
    --card-hover: #1C2027;
    --ink:        #E9EAEE;
    --ink-soft:   #C3C7CE;
    --muted:      #858C99;
    --line:       #262B33;
    --line-soft:  #1E222A;
    --accent:     #6BBFA4;
    --accent-dim: #16241F;
    --danger:     #E07A6B;
    --shadow:     0 1px 2px rgba(0, 0, 0, .4), 0 16px 40px -16px rgba(0, 0, 0, .7);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* 背景光晕 */
.aura {
  position: fixed;
  inset: -20% -10% auto -10%;
  height: 60vh;
  pointer-events: none;
  background:
    radial-gradient(60% 100% at 20% 0%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 70%),
    radial-gradient(50% 90% at 85% 10%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 70%);
  filter: blur(10px);
  z-index: 0;
}

/* ------------------------------- 顶栏 ------------------------------- */

.topbar {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 24px 0;
}

.brand { display: flex; align-items: center; gap: 11px; }

.mark { width: 34px; height: 34px; flex: none; }
.mark rect { fill: var(--accent); }
.mark path { fill: none; stroke: var(--paper); stroke-width: 2.4; stroke-linecap: round; }

.brand-text { display: flex; align-items: baseline; gap: 7px; }
.brand-en {
  font-family: var(--font-serif);
  font-size: 19px;
  letter-spacing: .01em;
}
.brand-zh {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: .22em;
}

.ghost-link {
  color: var(--accent);
  font-size: 11px;
  text-decoration: none;
  opacity: .5;
  transition: opacity .2s;
}
.ghost-link:hover { opacity: 1; }

/* ------------------------------- 主体 ------------------------------- */

main {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.hero { padding: 52px 0 30px; }

h1 {
  margin: 0 0 10px;
  font-size: 34px;
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -.015em;
}

.lede {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 46ch;
}

/* ------------------------------ 分步骤区块 ------------------------------ */

.stage { margin-top: 38px; }
main > .stage:first-of-type { margin-top: 6px; }

.stage-head { margin-bottom: 15px; }

.stage-step {
  display: inline-block;
  font-size: 11px;
  line-height: 1;
  letter-spacing: .16em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 4px 9px 3px;
  border-radius: 999px;
  margin-bottom: 9px;
  font-weight: 600;
}

.stage-head h2 {
  margin: 0 0 5px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -.01em;
}

.stage-head p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
}

/* 外链按钮（Java 下载）与站内下载按钮视觉一致 */
a.dl-btn { text-decoration: none; }

/* 同一张卡片里的「其他平台」备选链接 */
.file-alt {
  margin-top: 9px;
  font-size: 12.5px;
  color: var(--muted);
}
.file-alt a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: color-mix(in srgb, var(--muted) 40%, transparent);
}
.file-alt a:hover { color: var(--accent); }

/* 外链小箭头 */
.dl-btn .ext { width: 12px; height: 12px; opacity: .75; }

/* ------------------------------ 文件列表 ------------------------------ */

.files {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.file {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: border-color .18s, box-shadow .18s, transform .18s, background .18s;
}
.file:hover {
  border-color: color-mix(in srgb, var(--accent) 34%, var(--line));
  background: var(--card-hover);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.file-main { flex: 1; min-width: 0; }

.file-head {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.platform {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -.01em;
}

.badge {
  font-size: 11px;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 600;
  letter-spacing: .02em;
}

.file-notes {
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}
.file-notes li { position: relative; }
.file-notes li + li::before {
  content: "·";
  position: absolute;
  left: -10px;
  color: var(--line);
}

.file-hash {
  margin-top: 8px;
  font-size: 11.5px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  cursor: pointer;
  opacity: .75;
  transition: opacity .2s;
  word-break: break-all;
}
.file-hash:hover { opacity: 1; }
.file-hash::before { content: "SHA-256 "; opacity: .55; }

.dl-btn {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 0;
  border-radius: 11px;
  padding: 11px 18px;
  background: var(--accent);
  color: #FFFFFF;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .14s, filter .18s, opacity .18s;
}
@media (prefers-color-scheme: dark) { .dl-btn { color: #0E1014; } }
.dl-btn:hover { filter: brightness(1.07); }
.dl-btn:active { transform: scale(.97); }
.dl-btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.dl-btn svg { width: 15px; height: 15px; }
.dl-btn svg path { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* 骨架屏 */
.skeleton {
  height: 104px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(100deg, var(--line-soft) 30%, var(--card) 50%, var(--line-soft) 70%);
  background-size: 220% 100%;
  animation: shimmer 1.4s linear infinite;
}
@keyframes shimmer { from { background-position: 180% 0; } to { background-position: -60% 0; } }

/* ------------------------------- 提示条 ------------------------------- */

.hint {
  margin-top: 22px;
  padding: 13px 18px;
  border-radius: 12px;
  border: 1px dashed var(--line);
  color: var(--muted);
  font-size: 13px;
  background: color-mix(in srgb, var(--accent) 4%, transparent);
}

/* -------------------------------- 页脚 -------------------------------- */

.foot {
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 12.5px;
}
.foot p { margin: 0 0 5px; }
.foot strong { color: var(--ink-soft); font-weight: 600; }
.foot .dim { opacity: .6; }

/* ------------------------------- 对话框 ------------------------------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal[hidden] { display: none; }

.modal-mask {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, #0B0D10 42%, transparent);
  backdrop-filter: blur(6px);
  animation: fade .22s ease;
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  position: relative;
  width: min(400px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 26px 26px 22px;
  box-shadow: 0 30px 70px -20px rgba(0, 0, 0, .42);
  animation: rise .26s cubic-bezier(.16, 1, .3, 1);
}
@keyframes rise { from { opacity: 0; transform: translateY(14px) scale(.97); } to { opacity: 1; transform: none; } }

.modal-close {
  position: absolute;
  top: 12px;
  right: 14px;
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 21px;
  line-height: 1;
  cursor: pointer;
  transition: background .18s, color .18s;
}
.modal-close:hover { background: var(--line-soft); color: var(--ink); }

.modal-card h2 {
  margin: 0 0 5px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -.01em;
}
.modal-sub {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.captcha-box {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.captcha-box img {
  border-radius: 10px;
  border: 1px solid var(--line);
  display: block;
  flex: none;
  background: #F6F7F9;
}

.refresh {
  width: 40px;
  height: 40px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  color: var(--muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: color .18s, border-color .18s, transform .3s;
}
.refresh:hover { color: var(--accent); border-color: var(--accent); }
.refresh.spin { transform: rotate(360deg); }
.refresh svg { width: 17px; height: 17px; }
.refresh svg path { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

#captchaForm { display: flex; gap: 10px; }

#captchaInput {
  flex: 1;
  min-width: 0;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--paper);
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 16px;
  letter-spacing: .28em;
  text-transform: uppercase;
  outline: none;
  transition: border-color .18s, box-shadow .18s;
}
#captchaInput::placeholder { letter-spacing: 0; font-family: var(--font-sans); color: var(--muted); }
#captchaInput:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 16%, transparent);
}

.btn-primary {
  flex: none;
  border: 0;
  border-radius: 11px;
  padding: 11px 20px;
  background: var(--accent);
  color: #FFFFFF;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: filter .18s, opacity .18s;
}
@media (prefers-color-scheme: dark) { .btn-primary { color: #0E1014; } }
.btn-primary:hover { filter: brightness(1.07); }
.btn-primary:disabled { opacity: .55; cursor: not-allowed; filter: none; }

.modal-msg {
  margin: 13px 0 0;
  font-size: 13px;
  min-height: 20px;
  color: var(--danger);
}
.modal-msg.ok { color: var(--accent); }

.modal-meta {
  margin: 8px 0 0;
  font-size: 11.5px;
  color: var(--muted);
  min-height: 16px;
}

/* -------------------------------- Toast -------------------------------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 34px;
  transform: translate(-50%, 12px);
  z-index: 80;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, .5);
  opacity: 0;
  transition: opacity .22s, transform .22s;
  pointer-events: none;
}
.toast[hidden] { display: none; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 降级到自带图形验证码后，收起 reCAPTCHA 徽标（此时已不再使用它） */
body.captcha-fallback .grecaptcha-badge { display: none !important; }

/* ------------------------------- 响应式 ------------------------------- */

@media (max-width: 560px) {
  .hero { padding: 34px 0 22px; }
  h1 { font-size: 27px; }
  .file { flex-direction: column; align-items: stretch; gap: 16px; padding: 18px; }
  .dl-btn { justify-content: center; padding: 13px 18px; }
  .modal-card { padding: 22px 18px 18px; }
  #captchaForm { flex-direction: column; }
  #captchaInput { text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}