/* ---------- Theme tokens ---------- */
:root {
  color-scheme: light;
  --bg: #eaf1f8;
  --surface: #ffffff;
  --surface-2: #f3f7fc;
  --fg: #14233a;
  --muted: #5e718c;
  --border: #dde6f1;
  --accent: #16366d;          /* deep navy (logo) */
  --accent-hover: #1c3658;
  --accent-fg: #ffffff;
  --ring: rgba(17, 33, 59, 0.30);
  --ok-bg: #ecfdf5;   --ok-fg: #047857;   --ok-border: #a7f3d0;
  --warn-bg: #fffbeb; --warn-fg: #92400e; --warn-border: #fde68a;
  --danger-bg: #fef2f2; --danger-fg: #b91c1c; --danger-border: #fecaca;
  --neutral-bg: #f1f5f9; --neutral-fg: #475569; --neutral-border: #e2e8f0;
  --shadow: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-lg: 0 10px 30px rgba(16, 24, 40, 0.10);
  --radius: 12px;
}

/* dark vars, shared by explicit dark and (auto) system dark */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a1626; --surface: #0f2138; --surface-2: #163150;
  --fg: #e6eef8; --muted: #94a8c2; --border: #244467;
  --accent: #2d68a7; --accent-hover: #6484a9; --accent-fg: #ffffff;
  --ring: rgba(50, 83, 119, 0.45);
  --ok-bg: rgba(16,185,129,.12); --ok-fg: #6ee7b7; --ok-border: rgba(16,185,129,.32);
  --warn-bg: rgba(245,158,11,.12); --warn-fg: #fcd34d; --warn-border: rgba(245,158,11,.32);
  --danger-bg: rgba(239,68,68,.13); --danger-fg: #fca5a5; --danger-border: rgba(239,68,68,.32);
  --neutral-bg: rgba(148,163,184,.13); --neutral-fg: #cbd5e1; --neutral-border: rgba(148,163,184,.25);
  --shadow: 0 1px 3px rgba(0,0,0,.45); --shadow-lg: 0 14px 34px rgba(0,0,0,.55);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0a1626; --surface: #0f2138; --surface-2: #163150;
    --fg: #e6eef8; --muted: #94a8c2; --border: #244467;
    --accent: #2d68a7; --accent-hover: #6484a9; --accent-fg: #ffffff;
    --ring: rgba(50, 83, 119, 0.45);
    --ok-bg: rgba(16,185,129,.12); --ok-fg: #6ee7b7; --ok-border: rgba(16,185,129,.32);
    --warn-bg: rgba(245,158,11,.12); --warn-fg: #fcd34d; --warn-border: rgba(245,158,11,.32);
    --danger-bg: rgba(239,68,68,.13); --danger-fg: #fca5a5; --danger-border: rgba(239,68,68,.32);
    --neutral-bg: rgba(148,163,184,.13); --neutral-fg: #cbd5e1; --neutral-border: rgba(148,163,184,.25);
    --shadow: 0 1px 3px rgba(0,0,0,.45); --shadow-lg: 0 14px 34px rgba(0,0,0,.55);
  }
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--fg);
  background-color: var(--bg);  /* fallback */
  background:
    radial-gradient(1200px 500px at 100% -10%, color-mix(in srgb, var(--accent) 8%, transparent), transparent),
    var(--bg);
  background-attachment: fixed;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }
h1 { font-size: 1.6rem; letter-spacing: -0.01em; }
h2 { font-size: 1.2rem; margin-top: 1.6rem; }
h3 { font-size: 1rem; }
code { background: var(--surface-2); padding: 0.05rem 0.35rem; border-radius: 6px; font-size: 0.9em; }
.muted { color: var(--muted); }

/* ---------- Topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  background: var(--surface);  /* fallback */
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0.7rem 1.5rem;
  position: sticky; top: 0; z-index: 20;
}
.brand {
  font-weight: 800; color: var(--fg); text-decoration: none; letter-spacing: -0.01em;
  display: inline-flex; align-items: center; gap: 0.55rem;
}
.brand-logo {
  width: 1.6rem; height: 1.6rem; border-radius: 50%; object-fit: cover;
  box-shadow: 0 0 0 1px var(--border), 0 0 0 3px var(--ring);
}
.nav { display: flex; align-items: center; gap: 1rem; font-size: 0.9rem; flex-wrap: wrap; }
.nav a { color: var(--accent); text-decoration: none; }
.nav a:hover { text-decoration: underline; }

.theme-toggle {
  background: var(--surface-2); border: 1px solid var(--border); color: var(--fg);
  border-radius: 999px; width: 2rem; height: 2rem; cursor: pointer; font-size: 0.95rem;
  display: inline-flex; align-items: center; justify-content: center; transition: all .15s;
}
.theme-toggle:hover { border-color: var(--accent); }

/* ---------- Layout ---------- */
.container { max-width: 960px; margin: 2rem auto; padding: 0 1.25rem; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.right { text-align: right; }
.inline { display: inline; margin: 0; }

/* ---------- Flash ---------- */
.flash {
  padding: 0.65rem 0.95rem; border-radius: 10px; margin-bottom: 1rem;
  border: 1px solid var(--border); border-left-width: 4px; background: var(--surface);
  box-shadow: var(--shadow);
}
.flash-warning { background: var(--warn-bg); border-color: var(--warn-border); color: var(--warn-fg); }
.flash-danger  { background: var(--danger-bg); border-color: var(--danger-border); color: var(--danger-fg); }
.flash-success { background: var(--ok-bg); border-color: var(--ok-border); color: var(--ok-fg); }

/* ---------- Buttons ---------- */
.btn, .btn-sm {
  display: inline-flex; align-items: center; gap: 0.4rem; justify-content: center;
  background: var(--accent); color: var(--accent-fg); border: none; cursor: pointer;
  font-weight: 600; text-decoration: none; border-radius: 9px;
  box-shadow: var(--shadow); transition: transform .05s, background .15s, box-shadow .15s;
}
.btn { margin-top: 0.25rem; padding: 0.55rem 1rem; }
.btn-sm { padding: 0.35rem 0.75rem; font-size: 0.85rem; }
.btn:hover, .btn-sm:hover { background: var(--accent-hover); }
.btn:active, .btn-sm:active { transform: translateY(1px); }
a.btn, a.btn-sm { color: var(--accent-fg); }
.danger-btn, .danger-btn:hover { background: #dc2626; }
.linkbtn { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; padding: 0; }
.linkbtn:hover { text-decoration: underline; }
.linkbtn.danger { color: var(--danger-fg); }
button[disabled], input[disabled], textarea[disabled], select[disabled] { opacity: 0.5; cursor: not-allowed; }

/* ---------- Form controls ---------- */
input:not([type=checkbox]):not([type=radio]), select, textarea {
  color: var(--fg); background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 8px; font: inherit; padding: 0.5rem 0.6rem;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--ring); }
.field-error { color: var(--danger-fg); font-size: 0.85rem; display: block; }

.form-narrow { max-width: 440px; }
.form-narrow label { display: block; margin: 0.8rem 0 0.25rem; font-weight: 600; }
.form-narrow label.checkbox { font-weight: 400; }
.form-narrow input[type=email], .form-narrow input[type=password], .form-narrow input[type=text],
.form-narrow input[type=number] { width: 100%; }
.block { display: block; margin: 0.6rem 0; font-weight: 600; }
.block input, .block textarea {
  display: block; width: 100%; max-width: 640px; margin-top: 0.3rem; font-weight: 400;
}

/* ---------- Tables ---------- */
.table {
  width: 100%; border-collapse: collapse; margin-top: 0.75rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}
.table th, .table td { text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--border); }
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: var(--surface-2); }
.table thead th {
  color: var(--muted); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em;
  background: var(--surface-2); border-bottom: 1px solid var(--border);
}
.table tfoot td { padding-top: 0.7rem; background: var(--surface-2); }
.table input[type=text], .table input[type=number] { width: 100%; padding: 0.4rem; }
.table input.num { width: 5rem; }
.table textarea { width: 100%; min-width: 12rem; resize: vertical; }
.table select { padding: 0.4rem; }

/* ---------- Cards & panels ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem 1.15rem; margin-bottom: 1rem; box-shadow: var(--shadow);
}
.card-ok { border-color: var(--ok-border); }
.card-muted { opacity: 0.6; }
.card-actions { margin-top: 0.6rem; display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.card select { padding: 0.4rem; }
.panel {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 0.85rem 1.1rem; margin: 1rem 0; box-shadow: var(--shadow);
}
.panel summary { cursor: pointer; font-weight: 600; }
.preanalise { margin-top: 0.5rem; }

/* rendered Markdown (Pré-análise) */
.markdown-body { line-height: 1.6; }
.markdown-body > :first-child { margin-top: 0; }
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 {
  margin: 0.9rem 0 0.4rem; font-size: 1rem; line-height: 1.3;
}
.markdown-body p { margin: 0.5rem 0; }
.markdown-body ul, .markdown-body ol { margin: 0.5rem 0 0.5rem 1.3rem; padding: 0; }
.markdown-body li { margin: 0.15rem 0; }
.markdown-body code {
  background: var(--surface-2); padding: 0.05rem 0.35rem; border-radius: 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.9em;
}
.markdown-body pre {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 0.7rem 0.9rem; overflow-x: auto;
}
.markdown-body pre code { background: none; padding: 0; }
.markdown-body blockquote {
  margin: 0.6rem 0; padding: 0.2rem 0.9rem; border-left: 3px solid var(--border); color: var(--muted);
}
.markdown-body table { border-collapse: collapse; margin: 0.6rem 0; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border); padding: 0.3rem 0.55rem; }

/* ---------- Badges ---------- */
.badge {
  display: inline-block; padding: 0.12rem 0.55rem; border-radius: 999px;
  font-size: 0.74rem; font-weight: 600; margin-left: 0.3rem; border: 1px solid transparent;
}
.badge-warn { background: var(--warn-bg); color: var(--warn-fg); border-color: var(--warn-border); }
.badge-ok { background: var(--ok-bg); color: var(--ok-fg); border-color: var(--ok-border); }
.badge-danger { background: var(--danger-bg); color: var(--danger-fg); border-color: var(--danger-border); }
.badge-neutral { background: var(--neutral-bg); color: var(--neutral-fg); border-color: var(--neutral-border); }
.ok { color: var(--ok-fg); font-weight: 600; }

/* ---------- Misc components ---------- */
.repo-links { margin: 0.25rem 0 0.75rem; word-break: break-all; }
.inline-upload {
  display: flex; align-items: center; gap: 0.6rem; margin: 0.35rem 0;
  padding: 0.4rem 0; border-bottom: 1px solid var(--border);
}
.upload-label { min-width: 9rem; font-weight: 600; }

.progress { height: 12px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; overflow: hidden; max-width: 460px; }
.progress .bar { height: 100%; background: var(--accent); background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #22d3ee)); transition: width 0.3s ease; }

.group-row td { background: var(--surface-2); color: var(--muted); }
.table-scroll { overflow-x: auto; }
.grade-table { table-layout: fixed; min-width: 640px; }
.grade-table td { vertical-align: top; word-break: break-word; }
/* keep cell content inside its column (no more textarea overlapping the nota field).
   The .num override beats the global `.table input.num { width: 5rem }`, which was
   overflowing the narrow Nota column onto the Observação field. */
.grade-table input, .grade-table textarea, .grade-table input.num { width: 100%; min-width: 0; }
.grade-table textarea { resize: vertical; }
/* auto-resizing textareas (grow to fit content; height managed by JS) */
textarea.autosize { overflow: hidden; resize: none; min-height: 2.3rem; }

/* standardized form action buttons (same size, aligned) */
.form-actions { display: flex; gap: 0.75rem; align-items: stretch; margin-top: 1.25rem; flex-wrap: wrap; }
.form-actions .btn { margin-top: 0; }
.btn-secondary { background: var(--surface-2); color: var(--fg); border: 1px solid var(--border); box-shadow: none; }
.btn-secondary:hover { background: var(--surface); border-color: var(--accent); }
.sug-cell { font-size: 0.85rem; }
.sug-nota { color: var(--accent); margin-bottom: 0.25rem; }

.terminal {
  background: #0b1020; color: #d6e2ff; border-radius: 10px;
  padding: 0.8rem 1rem; margin-top: 0.75rem; max-height: 22rem; overflow-y: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem; line-height: 1.5; white-space: pre-wrap; word-break: break-word;
  border: 1px solid #1e293b;
}

/* ---------- Login ---------- */
.auth { display: flex; justify-content: center; padding: 2.5rem 1rem; }
.auth-card {
  width: 100%; max-width: 420px; background: var(--surface);
  border: 1px solid var(--border); border-radius: 16px; overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.auth-hero {
  text-align: center; padding: 2rem 1.5rem 1.6rem; color: #fff;
  background: radial-gradient(120% 120% at 50% -10%, #2c7fd6 0%, #0c2b52 55%, #081a33 100%);
}
.auth-logo {
  width: 104px; height: 104px; border-radius: 50%; object-fit: cover;
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.14), 0 10px 28px rgba(0, 0, 0, 0.45);
}
.auth-hero h1 { margin: 0.9rem 0 0.2rem; font-size: 1.4rem; color: #fff; }
.auth-hero p { margin: 0; font-size: 0.88rem; color: rgba(255, 255, 255, 0.82); }
.auth-body { padding: 1.5rem 1.5rem 1.75rem; }
.auth-body label { display: block; margin: 0.85rem 0 0.25rem; font-weight: 600; }
.auth-body label:first-of-type { margin-top: 0; }
.auth-body input { width: 100%; }
.btn-block { width: 100%; justify-content: center; margin-top: 1.25rem; }