:root {
  --bg: #241912;
  --paper: #f7efe1;
  --paper-deep: #efe0c6;
  --card: rgba(255, 248, 235, .94);
  --card-2: #fff8ec;
  --text: #2b1d14;
  --muted: #725f4d;
  --border: #d6bf9d;
  --border-strong: #9d7a50;
  --primary: #70421f;
  --primary-hover: #5b3217;
  --accent: #a57b3c;
  --ink: #3b2a1f;
  --olive: #536548;
  --erro-bg: #f4d7d0; --erro-fg: #832b22; --erro-bd: #c58576;
  --aviso-bg: #f7eac7; --aviso-fg: #71501b; --aviso-bd: #d8bd74;
  --ok: #536548;
  color-scheme: light;
}

* { box-sizing: border-box; }
body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(90deg, rgba(112, 66, 31, .08) 1px, transparent 1px) 0 0 / 44px 44px,
    linear-gradient(rgba(112, 66, 31, .07) 1px, transparent 1px) 0 0 / 44px 44px,
    radial-gradient(circle at top left, rgba(246, 224, 178, .36), transparent 34rem),
    linear-gradient(145deg, #2a1b13 0%, #4b2d1c 42%, #81643c 100%);
  color: var(--text);
  font: 15px/1.5 Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}
a { color: var(--primary); font-weight: 700; text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.centered { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.container {
  width: min(960px, 100%);
  margin: 0 auto;
  padding: 28px 20px 44px;
  display: grid;
  gap: 18px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px clamp(16px, 4vw, 34px);
  border-bottom: 1px solid rgba(247, 239, 225, .2);
  background: rgba(36, 25, 18, .82);
  color: #f8eddb;
  backdrop-filter: blur(16px);
  box-shadow: 0 12px 30px rgba(31, 20, 13, .22);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(247, 239, 225, .5);
  background: #f7efe1;
  color: var(--primary);
  font: 800 13px/1 Georgia, Times, serif;
  letter-spacing: .08em;
}
.brand strong {
  display: block;
  color: #fff8ec;
  font: 700 16px/1.1 Georgia, Times, serif;
}
.brand span:last-child {
  display: block;
  margin-top: 2px;
  color: #d7c3a2;
  font-size: 12px;
}
.session {
  flex: none;
  color: #d7c3a2;
  font-size: 13px;
}
.session a { color: #f6deb1; }

.section-heading {
  display: grid;
  gap: 7px;
  margin-bottom: 18px;
}

.card {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .42), rgba(255, 255, 255, 0)),
    var(--card);
  border: 1px solid rgba(255, 248, 236, .55);
  border-radius: 8px;
  padding: clamp(18px, 3vw, 28px);
  box-shadow: 0 18px 52px rgba(32, 20, 13, .26);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border: 1px solid rgba(112, 66, 31, .18);
  border-radius: inherit;
}
.workspace-card {
  border-top: 4px solid var(--accent);
}
.login-card { width: min(380px, 92vw); }
h1, h2 {
  margin: 0;
  color: var(--ink);
  font-family: Georgia, Times, serif;
  line-height: 1.08;
}
h1 { font-size: clamp(30px, 5vw, 52px); font-weight: 700; }
h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 700; }
.eyebrow {
  width: fit-content;
  color: var(--olive);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.section-heading p {
  max-width: 650px;
  margin: 0;
}

label { display: block; margin: 14px 0; font-size: 14px; color: var(--muted); }
input[type=text], input[type=password] {
  display: block; width: 100%; margin-top: 6px; padding: 10px 12px;
  background: var(--card-2); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); font-size: 15px;
}
input:focus { outline: 2px solid var(--primary); border-color: transparent; }

button, .primary, .ghost {
  min-height: 42px;
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.1;
  border-radius: 6px;
  padding: 11px 17px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .12s ease, background .12s ease, border-color .12s ease, box-shadow .12s ease;
}
.primary {
  background: linear-gradient(180deg, #845126, var(--primary));
  color: #fff8ec;
  border: 1px solid rgba(73, 40, 18, .2);
  display: inline-block; text-align: center;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.16), 0 10px 22px rgba(85, 46, 20, .18);
}
.primary:hover {
  background: linear-gradient(180deg, #744620, var(--primary-hover));
  text-decoration: none;
  transform: translateY(-1px);
}
.primary:disabled { opacity: .5; cursor: not-allowed; }
.primary:disabled:hover { transform: none; }
.ghost {
  background: rgba(255, 248, 236, .48);
  color: var(--ink);
  border: 1px solid var(--border);
}
.ghost:hover { border-color: var(--border-strong); }
form button.primary { width: 100%; margin-top: 8px; }

.dropzone {
  margin-top: 8px;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255,255,255,.48), rgba(255,255,255,0)),
    repeating-linear-gradient(-45deg, rgba(112,66,31,.045) 0 9px, transparent 9px 18px),
    var(--card-2);
  padding: clamp(26px, 5vw, 48px) 18px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s, box-shadow .15s, transform .15s;
}
.dropzone:hover, .dropzone:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: inset 0 0 0 1px rgba(112, 66, 31, .25);
}
.dropzone.dragover {
  border-color: var(--primary);
  background:
    linear-gradient(135deg, rgba(255,255,255,.5), rgba(255,255,255,0)),
    repeating-linear-gradient(-45deg, rgba(83,101,72,.08) 0 9px, transparent 9px 18px),
    #fff6e8;
  transform: translateY(-1px);
}
.dz-icon {
  display: grid;
  width: 58px;
  height: 72px;
  place-items: center;
  margin: 0 auto 14px;
  border: 1px solid var(--border-strong);
  background: #f7ead3;
  color: var(--primary);
  font: 800 13px/1 Georgia, Times, serif;
  box-shadow: 7px 7px 0 rgba(112, 66, 31, .13);
}
.dz-inner p { margin: 6px 0; }

.filelist { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 6px; }
.filelist li {
  display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 9px 12px;
  background: rgba(255, 248, 236, .78); border: 1px solid var(--border); border-radius: 6px;
  font-size: 14px;
}
.filelist li > span:first-child {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.filelist .rm {
  min-height: auto;
  padding: 0;
  color: var(--primary);
  cursor: pointer;
  border: none;
  background: none;
  box-shadow: none;
}

.actions { display: flex; align-items: center; gap: 12px; margin-top: 16px; flex-wrap: wrap; }

.progress { margin-top: 16px; }
.progress .bar {
  height: 8px; width: 0%; background: linear-gradient(90deg, var(--olive), var(--accent)); border-radius: 999px;
  transition: width .1s linear;
}
.progress span { display: block; margin-top: 6px; }

.alert { margin-top: 14px; padding: 10px 14px; border-radius: 6px; font-size: 14px; }
.alert.erro { background: var(--erro-bg); color: var(--erro-fg); border: 1px solid var(--erro-bd); }
.alert.aviso { background: var(--aviso-bg); color: var(--aviso-fg); border: 1px solid var(--aviso-bd); }

.tablewrap { overflow-x: auto; margin-top: 10px; }
table.preview { width: 100%; border-collapse: collapse; font-size: 14px; }
table.preview th, table.preview td {
  text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
table.preview th {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}
table.preview tr.nao-reconhecida td { color: var(--aviso-fg); }
details summary { cursor: pointer; margin-top: 18px; color: var(--muted); font-weight: 800; }

@media (max-width: 620px) {
  .topbar {
    align-items: flex-start;
    padding: 10px 14px;
  }
  .brand-mark {
    width: 34px;
    height: 34px;
  }
  .brand span:last-child {
    display: none;
  }
  .session {
    padding-top: 3px;
    text-align: right;
  }
  .container {
    padding: 18px 12px 28px;
  }
  .card {
    padding: 18px;
  }
  .actions {
    align-items: stretch;
  }
  .actions .primary,
  .actions .ghost,
  .actions button {
    width: 100%;
  }
  .filelist li {
    align-items: flex-start;
    flex-direction: column;
  }
}