@font-face {
  font-family: "Notehack Sans";
  src: url("/notehack/assets/fonts/NotoSansCJK-Regular.ttc") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Notehack Sans";
  src: url("/notehack/assets/fonts/NotoSansCJK-Bold.ttc") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  --bg-top: #eff3fa;
  --bg-main: #dfe4ef;
  --surface: #ffffff;
  --surface-soft: #fbfcff;
  --surface-tint: #f4f7fd;
  --text: #0a1633;
  --muted: #6b798e;
  --line: #d9e0ec;
  --line-strong: #c3cad9;
  --accent: #3860f4;
  --accent-strong: #3357df;
  --accent-soft: #5b82ff;
  --accent-ghost: rgba(56, 96, 244, 0.12);
  --card-shadow: 0 1px 0 rgba(255, 255, 255, 0.84), 0 8px 22px rgba(105, 124, 163, 0.12);
  --control-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.84), 0 1px 2px rgba(135, 151, 183, 0.14);
  --primary-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14), 0 2px 5px rgba(20, 54, 185, 0.24), 0 8px 18px rgba(56, 96, 244, 0.14);
  --max-width: 1120px;
  --font-sans: "Notehack Sans", "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Monaco", "Cascadia Mono", "Segoe UI Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, var(--bg-top) 0%, #e8edf7 18%, var(--bg-main) 100%);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.55;
}

body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto;
  height: 320px;
  background:
    radial-gradient(circle at top center, rgba(91, 130, 255, 0.14), transparent 46%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0));
  pointer-events: none;
}

body,
button,
input,
select,
a {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  border-radius: 4px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(56, 96, 244, 0.18);
}

.page {
  position: relative;
  z-index: 0;
}

.site-shell {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(201, 211, 229, 0.9);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 1px 0 rgba(226, 232, 243, 0.85);
  backdrop-filter: blur(12px);
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  min-height: 72px;
  padding: 0.6rem 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.95rem;
  min-width: 0;
}

.site-mark {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #3d60e6;
}

.site-subtitle {
  padding-left: 0.9rem;
  border-left: 1px solid #dde3ef;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: #7c889f;
  white-space: nowrap;
}

.site-nav {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: repeat(2, minmax(88px, 1fr));
  min-width: 188px;
  padding: 4px;
  background: linear-gradient(180deg, #f6f8fd 0%, #eef3fb 100%);
  border: 1px solid #cfd7e6;
  border-radius: 8px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.88), 0 1px 2px rgba(117, 137, 173, 0.12);
}

.site-nav::before {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: 4px;
  width: calc(50% - 4px);
  border-radius: 6px;
  background: linear-gradient(180deg, var(--accent-soft) 0%, var(--accent) 100%);
  box-shadow: var(--primary-shadow);
  transition: transform 220ms ease;
}

body.page-recover .site-nav::before {
  transform: translateX(100%);
}

.site-nav a {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 1.15rem;
  border: 0;
  border-radius: 6px;
  color: #526075;
  font-size: 0.94rem;
  font-weight: 600;
  transition: color 180ms ease;
}

.site-nav a[aria-current="page"] {
  color: #ffffff;
}

.site-nav a:not([aria-current="page"]):hover,
.site-nav a:not([aria-current="page"]):focus-visible {
  color: var(--accent);
}

.mobile-page-nav {
  display: none;
}

.page-main {
  display: grid;
  gap: 1rem;
  width: min(calc(100% - 2rem), var(--max-width));
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.75rem 0 3rem;
}

.page-intro,
.tool-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--card-shadow);
}

.page-intro {
  position: relative;
  display: grid;
  gap: 0.42rem;
  padding: 1.35rem 1.5rem 1.25rem;
}

.tool-card {
  display: grid;
  gap: 1rem;
  padding: 1.35rem 1.5rem 1.5rem;
}

.page-intro::before {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-soft) 100%);
}

.tool-card::before {
  content: none;
}

body.page-encode .page-intro::after,
body.page-recover .page-intro::after {
  position: absolute;
  top: 1.35rem;
  right: 1.5rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #9aa8c6;
}

body.page-encode .page-intro::after {
  content: "Generate";
}

body.page-recover .page-intro::after {
  content: "Recover";
}

.page-intro h1 {
  margin: 0;
  font-size: clamp(1.92rem, 3vw, 2.48rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  font-weight: 700;
}

.page-intro p,
.info-band-desc,
.meta,
small,
.result-note,
.preview-placeholder-desc,
.preview-hint,
.tag {
  margin: 0;
  color: var(--muted);
}

.page-intro p {
  max-width: 42rem;
  font-size: 0.92rem;
  line-height: 1.65;
}

.tool-form,
.option-grid,
.status-strip,
.meta-grid,
.preview-strip {
  display: grid;
}

.tool-form {
  gap: 1rem;
}

.option-grid,
.status-strip,
.meta-grid,
.preview-strip {
  gap: 0.9rem;
}

.section-label,
.status-label,
.meta-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: #6f7c95;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 0;
}

.section-label::after {
  content: "";
  flex: 1;
  border-top: 1px solid #e8edf7;
}

.field {
  display: grid;
  gap: 0.45rem;
  padding: 0;
  border: 0;
  background: transparent;
}

.field-prominent,
.info-band,
.meta,
.preview-placeholder,
.preview-card {
  display: grid;
  gap: 0.45rem;
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: linear-gradient(180deg, #ffffff 0%, var(--surface-soft) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.82);
}

.preview-card {
  background: #ffffff;
}

.field:hover input[type="password"],
.field:hover select,
.field-prominent:hover,
.info-band:hover,
.preview-card:hover {
  border-color: #c7d1e4;
}

.field label {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

small {
  font-size: 0.79rem;
  line-height: 1.55;
}

input[type="file"],
input[type="password"],
select {
  width: 100%;
  min-height: 44px;
  padding: 0.72rem 0.95rem;
  border: 1px solid #d3dbe9;
  border-radius: 4px;
  background: linear-gradient(180deg, #fbfcff 0%, #f4f7fd 100%);
  color: var(--text);
  box-shadow: var(--control-shadow);
  transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

input[type="file"] {
  min-height: 46px;
  padding: 0.45rem 0.55rem;
}

input[type="file"]::file-selector-button {
  margin-right: 0.8rem;
  padding: 0.56rem 0.86rem;
  border: 1px solid #ccd5e6;
  border-radius: 4px;
  background: linear-gradient(180deg, #ffffff 0%, #f6f8fd 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.86), 0 1px 2px rgba(125, 145, 180, 0.14);
  color: #33415c;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease;
}

input[type="file"]::file-selector-button:hover {
  border-color: #b9c5dc;
  background: #ffffff;
}

input[type="file"]:hover,
input[type="password"]:hover,
select:hover {
  border-color: #bcc7db;
  background: linear-gradient(180deg, #ffffff 0%, #f6f8fd 100%);
}

input[type="file"]:focus-visible,
input[type="password"]:focus-visible,
select:focus-visible {
  border-color: var(--accent);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(56, 96, 244, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

input:disabled,
select:disabled {
  color: #8d98ad;
  background: #f0f3f8;
  border-color: #d7deea;
  cursor: not-allowed;
  box-shadow: none;
}

.info-band-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.option-grid-basic {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem 1.2rem;
}

.option-grid-advanced,
.option-grid-compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.2rem;
}

.advanced-options {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: linear-gradient(180deg, #fcfdff 0%, #f7f9fd 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.82);
}

.advanced-options summary {
  padding: 0.92rem 1rem;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  color: var(--text);
}

.advanced-options summary::-webkit-details-marker {
  display: none;
}

.advanced-options summary::after {
  content: "+";
  float: right;
  font-family: var(--font-mono);
  color: var(--accent);
}

.advanced-options[open] summary::after {
  content: "-";
}

.advanced-options[open] .option-grid {
  padding: 0 1rem 1rem;
}

.action-bar,
.result-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.result-toolbar {
  justify-content: space-between;
  padding-top: 0.25rem;
  border-top: 1px solid #edf1f8;
}

.button-primary,
.button-secondary,
#download-file {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.72rem 1.2rem;
  border-radius: 4px;
  font-weight: 600;
  transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease, color 180ms ease;
}

.button-primary {
  border: 1px solid var(--accent);
  background: linear-gradient(180deg, var(--accent-soft) 0%, var(--accent) 100%);
  color: #ffffff;
  cursor: pointer;
  box-shadow: var(--primary-shadow);
}

.button-primary:hover,
.button-primary:focus-visible {
  border-color: var(--accent-strong);
  background: linear-gradient(180deg, #6a90ff 0%, #446cf5 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.16), 0 3px 7px rgba(20, 54, 185, 0.26), 0 10px 20px rgba(56, 96, 244, 0.16);
}

.button-secondary,
#download-file {
  border: 1px solid #d3dbe9;
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fd 100%);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--control-shadow);
}

.button-secondary:hover,
.button-secondary:focus-visible,
#download-file:hover,
#download-file:focus-visible {
  border-color: #bcc7db;
  background: #ffffff;
  color: #27438f;
}

.button-large {
  min-width: 176px;
}

.button-primary:disabled,
.button-secondary:disabled,
.button-secondary.disabled,
#download-file.disabled {
  color: #aeb7ca;
  background: #f3f5fa;
  border-color: #e1e6f0;
  box-shadow: none;
  pointer-events: none;
  cursor: not-allowed;
}

.status-strip,
.meta-grid {
  padding: 0;
  border: 0;
  background: transparent;
}

.status-strip {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.meta-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.status-card,
.meta-item {
  display: grid;
  gap: 0.22rem;
  align-content: start;
  min-height: 74px;
  padding: 0.82rem 0.94rem;
  border: 1px solid #dbe2ef;
  border-radius: 4px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfcff 100%);
  box-shadow: 0 1px 2px rgba(109, 128, 164, 0.08);
}

.status-value,
.meta-value {
  font-size: 0.98rem;
  line-height: 1.42;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  word-break: break-word;
}

.meta-detail {
  min-height: 6rem;
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.65;
}

.preview-strip {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

.preview-card canvas {
  width: 100%;
  height: auto;
  display: block;
  cursor: pointer;
  background: #ffffff;
  border: 1px solid #e1e6f0;
  border-radius: 4px;
}

.preview-placeholder {
  grid-column: 1 / -1;
  min-height: 136px;
  align-content: center;
  justify-items: start;
}

.preview-placeholder-title {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text);
}

.tag {
  font-size: 0.8rem;
  font-weight: 600;
}

@media (max-width: 920px) {
  .page-main {
    width: min(100%, 100%);
  }

  .option-grid-basic {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .status-strip,
  .meta-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    display: none;
  }

  .site-shell {
    width: min(calc(100% - 1rem), var(--max-width));
  }

  .site-header-inner,
  .action-bar,
  .result-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav {
    width: 100%;
    min-width: 0;
  }

  .mobile-page-nav {
    display: grid;
  }

  .page-main {
    gap: 0.85rem;
    width: min(calc(100% - 1rem), var(--max-width));
    padding: 0.75rem 0 2rem;
  }

  .page-intro,
  .tool-card {
    padding: 1rem;
  }

  body.page-encode .page-intro::after,
  body.page-recover .page-intro::after {
    position: static;
    margin-top: 0.1rem;
  }

  .option-grid-basic,
  .option-grid-advanced,
  .option-grid-compact,
  .status-strip,
  .meta-grid,
  .preview-strip {
    grid-template-columns: 1fr;
  }

  .button-primary,
  .button-secondary,
  #download-file {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .site-subtitle {
    display: none;
  }

  .page-intro h1 {
    font-size: 1.8rem;
  }

  .status-card,
  .meta-item {
    min-height: 68px;
    padding: 0.76rem 0.84rem;
  }
}