:root {
  --bg: #0f141a;
  --sidebar: #141b23;
  --panel: #1a212a;
  --panel-2: #212a34;
  --line: #2a333d;
  --ink: #e9eef4;
  --ink-soft: #8a97a6;
  --accent: #4fb0a5;
  --accent-2: #63d0c3;
  --accent-ink: #05110f;
  --danger: #e07a6a;
  --ok: #6bbf7a;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
  --sans: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;

  /* categorias de arquivo */
  --c-code: #4fb0a5;
  --c-archive: #e0a24f;
  --c-image: #6bbf7a;
  --c-doc: #7d8ff0;
  --c-sheet: #4fb08a;
  --c-slide: #d67ab0;
  --c-other: #7c8794;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 22px; margin: 0; letter-spacing: .2px; }

/* ============ App shell ============ */
.app { display: grid; grid-template-columns: 248px 1fr; min-height: 100vh; }

.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--line);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 26px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); padding: 0 6px; }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: var(--accent-ink);
}
.brand-name { font-weight: 700; letter-spacing: .3px; font-size: 15px; }

.side-nav { display: flex; flex-direction: column; gap: 4px; }
.nav-item {
  display: flex; align-items: center; gap: 11px;
  padding: 10px 12px; border-radius: 9px;
  color: var(--ink-soft); font-size: 14px; font-weight: 500;
}
.nav-item:hover { background: var(--panel-2); color: var(--ink); text-decoration: none; }
.nav-item.is-active { background: rgba(79,176,165,.14); color: var(--accent-2); }
.nav-item svg { flex: 0 0 auto; }

.side-foot { margin-top: auto; display: flex; flex-direction: column; gap: 12px; }
.user-chip { display: flex; align-items: center; gap: 10px; }
.avatar {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--panel-2); border: 1px solid var(--line);
  color: var(--accent-2); font-weight: 700; font-size: 13px; flex: 0 0 auto;
}
.user-name { font-size: 13px; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============ Conteúdo ============ */
.content { min-width: 0; }
.content-head {
  padding: 22px 30px;
  border-bottom: 1px solid var(--line);
  background: rgba(15,20,26,.7);
  backdrop-filter: blur(6px);
  position: sticky; top: 0; z-index: 5;
}
.content-sub { margin: 4px 0 0; color: var(--ink-soft); font-size: 13px; font-family: var(--mono); }
.wrap { padding: 26px 30px 60px; max-width: 1100px; }

/* ============ Cartões de stats ============ */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 24px; }
.stat {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 13px; padding: 16px 18px;
}
.stat-label { color: var(--ink-soft); font-size: 12px; text-transform: uppercase; letter-spacing: .8px; }
.stat-value { font-size: 24px; font-weight: 700; margin-top: 6px; }
.stat-value small { font-size: 13px; color: var(--ink-soft); font-weight: 500; }

/* ============ Painéis ============ */
.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 22px; margin-bottom: 22px;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; gap: 12px; }
.panel h2 {
  margin: 0; font-size: 13px; text-transform: uppercase;
  letter-spacing: 1.1px; color: var(--ink-soft); font-weight: 600;
}

/* colapsável de upload */
details.upload { border: 1px dashed var(--line); border-radius: 14px; margin-bottom: 22px; background: var(--panel); }
details.upload > summary {
  cursor: pointer; list-style: none; padding: 16px 22px;
  display: flex; align-items: center; gap: 10px; font-weight: 600; color: var(--ink);
}
details.upload > summary::-webkit-details-marker { display: none; }
details.upload > summary .plus { color: var(--accent-2); font-size: 18px; }
details.upload[open] > summary { border-bottom: 1px solid var(--line); }
.upload-body { padding: 22px; }

/* ============ Formulários ============ */
label { display: block; font-size: 13px; color: var(--ink-soft); margin-bottom: 6px; }
input[type=text], input[type=password], input[type=file], select, textarea {
  width: 100%; padding: 10px 12px; background: var(--panel-2);
  border: 1px solid var(--line); border-radius: 9px;
  color: var(--ink); font-family: var(--sans); font-size: 14px;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);
}
.field { margin-bottom: 14px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 16px; border-radius: 9px; border: 1px solid transparent;
  font-size: 14px; font-weight: 600; cursor: pointer; font-family: var(--sans);
}
.btn-sm { padding: 7px 12px; font-size: 13px; }
.btn-primary { background: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { filter: brightness(1.08); text-decoration: none; }
.btn-ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--accent); text-decoration: none; }
.btn-danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: var(--danger); color: #fff; text-decoration: none; }

/* ============ Alertas ============ */
.alert { padding: 11px 15px; border-radius: 10px; margin-bottom: 18px; font-size: 14px; }
.alert-err { background: rgba(224,122,106,.12); border: 1px solid var(--danger); color: #f0b6ad; }
.alert-ok  { background: rgba(107,191,122,.12); border: 1px solid var(--ok); color: #b7e3c0; }

/* ============ Busca ============ */
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 18px; }
.toolbar .field { margin-bottom: 0; }
.toolbar .field.grow { flex: 1; min-width: 180px; }

/* ============ Tabela ============ */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td {
  text-align: left; padding: 12px; border-bottom: 1px solid var(--line);
  font-size: 14px; vertical-align: middle;
}
.table th { color: var(--ink-soft); font-size: 12px; text-transform: uppercase; letter-spacing: .7px; }
.table tr:last-child td { border-bottom: none; }
.table tbody tr:hover td { background: var(--panel-2); }

.file-cell { display: flex; align-items: center; gap: 12px; }
.ftype {
  flex: 0 0 auto; width: 42px; height: 42px; border-radius: 10px;
  display: grid; place-items: center;
  font-family: var(--mono); font-size: 10px; font-weight: 700; letter-spacing: .3px;
  color: #fff; background: var(--c-other);
}
.ftype.code    { background: color-mix(in srgb, var(--c-code) 85%, #000); }
.ftype.archive { background: color-mix(in srgb, var(--c-archive) 85%, #000); }
.ftype.image   { background: color-mix(in srgb, var(--c-image) 85%, #000); }
.ftype.doc     { background: color-mix(in srgb, var(--c-doc) 85%, #000); }
.ftype.sheet   { background: color-mix(in srgb, var(--c-sheet) 85%, #000); }
.ftype.slide   { background: color-mix(in srgb, var(--c-slide) 85%, #000); }
.fname { font-weight: 600; }
.meta { font-family: var(--mono); font-size: 12px; color: var(--ink-soft); }
.tag {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  background: var(--panel-2); border: 1px solid var(--line);
  font-size: 12px; color: var(--ink-soft);
}
.actions { display: flex; gap: 8px; justify-content: flex-end; align-items: center; }
.empty { text-align: center; color: var(--ink-soft); padding: 40px; font-family: var(--mono); font-size: 13px; }

/* ============ Login / setup ============ */
.login-shell { max-width: 380px; margin: 9vh auto 0; padding: 0 18px; }
.login-shell .brand { justify-content: center; margin-bottom: 20px; }
.login-shell .panel { padding: 24px; }

/* ============ Responsivo ============ */
@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .sidebar {
    position: static; height: auto; flex-direction: row; align-items: center;
    gap: 14px; padding: 12px 16px; overflow-x: auto;
  }
  .side-nav { flex-direction: row; }
  .side-foot { margin: 0 0 0 auto; flex-direction: row; align-items: center; }
  .user-name { display: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .content-head, .wrap { padding-left: 18px; padding-right: 18px; }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .table thead { display: none; }
  .table td { display: block; border: none; padding: 3px 12px; }
  .table tr { display: block; border-bottom: 1px solid var(--line); padding: 12px 0; }
  .actions { justify-content: flex-start; margin-top: 8px; }
}