:root {
  color-scheme: light;
  font-family: 'Avenir Next', 'Helvetica Neue', sans-serif;
  background: #f5f4f0;
  color: #1d2422;
  --ink: #1d2422;
  --muted: #68716d;
  --line: #d9ddd7;
  --paper: #fbfbf8;
  --lime: #d9f36a;
  --coral: #f28d73;
}

body {
  margin: 0;
}

[hidden] {
  display: none !important;
}

.app-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  box-sizing: border-box;
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 0;
  box-sizing: border-box;
  min-height: 100vh;
  padding: 46px 42px 34px;
  background: var(--ink);
  color: #f6f7ef;
}

.brand,
.sidebar-intro,
.tool-nav {
  margin-bottom: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--lime);
  color: var(--ink);
  font-size: 20px;
}
.brand strong {
  display: block;
  font-size: 20px;
  letter-spacing: 0.04em;
}
.brand div span {
  display: block;
  margin-top: 2px;
  color: #a9b1ac;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.eyebrow {
  color: #87938b;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
}
.sidebar-intro p {
  margin: 14px 0 0;
  color: #dfe4dd;
  font-size: 21px;
  line-height: 1.35;
}
.tool-nav {
  display: grid;
  gap: 10px;
}

.menu-item {
  width: 100%;
  border: 0;
  border-radius: 0;
  padding: 0;
  background: transparent;
  display: flex;
  align-items: center;
  gap: 13px;
  color: #9ba59e;
  cursor: pointer;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  text-align: left;
}

.menu-item.active {
  color: #ffffff;
}
.menu-index {
  color: #66726a;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.menu-item.active .menu-index {
  color: var(--lime);
}
.menu-item:hover {
  color: #ffffff;
}
.sidebar-foot {
  margin-top: auto;
  color: #68746b;
  font-size: 10px;
  letter-spacing: 0.15em;
}
.sidebar-foot span {
  color: var(--lime);
  margin-left: 5px;
}

.workspace {
  box-sizing: border-box;
  min-width: 0;
  padding: 74px clamp(32px, 8vw, 132px) 64px;
  background:
    radial-gradient(circle at 86% 10%, #e8f0d5 0, transparent 24%), var(--paper);
}

.tool-panel {
  display: grid;
  gap: 42px;
  max-width: 760px;
}

.panel-heading {
  display: grid;
  gap: 12px;
}
.panel-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  color: var(--ink);
  font-size: clamp(38px, 5vw, 64px);
  letter-spacing: -0.04em;
  line-height: 1.15;
}

.form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
  color: #222222;
  font-size: 18px;
  font-weight: 600;
}

.upload-box {
  position: relative;
  display: grid;
  place-items: center;
  box-sizing: border-box;
  min-height: 260px;
  border: 1px dashed #aeb8ac;
  border-radius: 4px;
  padding: 36px;
  background: #f0f3e9;
  color: var(--ink);
  cursor: pointer;
  font-size: 22px;
  font-weight: 600;
  text-align: center;
}
.upload-box:hover {
  border-color: var(--ink);
  background: #eaf2d4;
}
.upload-icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 4px;
  border-radius: 50%;
  background: var(--lime);
  font-size: 30px;
  font-weight: 400;
}
.upload-box small {
  color: #879188;
  font-size: 10px;
  letter-spacing: 0.18em;
}

.upload-box input[type='file'] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

input[type='file'],
input[type='number'],
input[type='url'],
select {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid #d4d4d4;
  border-radius: 10px;
  padding: 12px;
  background: #ffffff;
  color: #111111;
  font-size: 16px;
}

select,
input[type='number'],
input[type='url'] {
  min-height: 47px;
}

.split-options {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.file-summary {
  display: grid;
  gap: 10px;
}

.file-summary-header,
.file-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.file-summary-header span {
  color: #222222;
  font-weight: 700;
}

.file-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.file-list li {
  border: 1px solid #dddddd;
  border-radius: 10px;
  padding: 10px 12px;
  background: #f7f7f7;
}

.file-list span {
  min-width: 0;
  overflow-wrap: anywhere;
}

button {
  width: fit-content;
  border: 0;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 34px;
  border-radius: 3px;
  background: var(--ink);
  color: #ffffff;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  padding: 17px 20px;
}
.button-arrow {
  color: var(--lime);
  font-size: 21px;
  line-height: 1;
}
button:hover {
  background: #35433c;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

.message {
  min-height: 24px;
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.message.error {
  color: #b42318;
}

.usage-note,
.result-meta {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.usage-note {
  margin: 0;
}

.result {
  display: grid;
  gap: 12px;
  margin-top: 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.result-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.result a {
  color: var(--ink);
  font-weight: 700;
}

button.secondary {
  border: 1px solid #d4d4d4;
  background: transparent;
  color: var(--ink);
}

button.small {
  padding: 8px 12px;
  font-size: 14px;
}
.field select,
.field input {
  margin-top: 2px;
}

textarea {
  box-sizing: border-box;
  min-height: 260px;
  width: 100%;
  resize: vertical;
  border: 1px solid #d4d4d4;
  border-radius: 10px;
  padding: 14px;
  color: #111111;
  font:
    14px/1.6 ui-monospace,
    SFMono-Regular,
    Menlo,
    Consolas,
    monospace;
}

@media (max-width: 860px) {
  .app-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    min-height: auto;
    padding: 28px 24px 24px;
  }

  .menu-item {
    font-size: 18px;
  }

  .workspace {
    padding: 42px 24px;
  }

  h1 {
    font-size: 38px;
  }

  .tool-panel {
    gap: 32px;
  }

  .upload-box {
    min-height: 180px;
    font-size: 22px;
  }

  .brand,
  .sidebar-intro,
  .tool-nav {
    margin-bottom: 30px;
  }
  .sidebar-intro p {
    font-size: 17px;
  }
  .sidebar-foot {
    display: none;
  }

  button {
    width: 100%;
    font-size: 24px;
  }

  .result-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .split-options {
    grid-template-columns: 1fr;
  }
}