/* ============================================================
   EduVortex — estilos compartilhados (site do aluno + painel)
   ============================================================ */

:root {
  --brand: #5b3df5;
  --brand-soft: #ede9ff;
  --brand-2: #06b6d4;
  --ok: #10b981;
  --warn: #f59e0b;
  --danger: #e11d48;

  --bg: #f5f5fa;
  --surface: #ffffff;
  --surface-2: #fbfbfe;
  --text: #16151f;
  --muted: #6b6880;
  --border: #e6e4f0;
  --shadow: 0 1px 2px rgba(22, 21, 31, .05), 0 8px 24px -12px rgba(22, 21, 31, .18);

  --radius: 14px;
  --radius-sm: 9px;
  --max: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #8b6dff;
    --brand-soft: #241d47;
    --bg: #0e0d15;
    --surface: #17161f;
    --surface-2: #1d1c27;
    --text: #f0eff5;
    --muted: #9b98ad;
    --border: #2a2836;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px -12px rgba(0, 0, 0, .6);
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.2; margin: 0; font-weight: 700; letter-spacing: -.02em; }
p { margin: 0; }
a { color: var(--brand); }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* ---------------- Cabeçalho ---------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 62px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -.03em;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
}

.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: conic-gradient(from 210deg, var(--brand), var(--brand-2), var(--brand));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 15px;
  box-shadow: 0 4px 12px -4px var(--brand);
}

.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }

.nav a {
  padding: 8px 14px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
  transition: background .15s, color .15s;
}

.nav a:hover { background: var(--surface-2); color: var(--text); }
.nav a.active { background: var(--brand-soft); color: var(--brand); }

/* ---------------- Botões ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: var(--brand);
  color: #fff;
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: filter .15s, transform .05s, background .15s;
}

.btn:hover { filter: brightness(1.08); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; filter: none; }

.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--surface-2); filter: none; }
.btn-danger { background: transparent; border-color: var(--border); color: var(--danger); }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 10%, transparent); filter: none; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-block { width: 100%; }

/* ---------------- Formulários ---------------- */

.field { display: flex; flex-direction: column; gap: 6px; }

.label { font-size: 13px; font-weight: 600; color: var(--muted); }

.input, .select, textarea.input {
  width: 100%;
  padding: 10px 13px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  transition: border-color .15s, box-shadow .15s;
}

.input:focus, .select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 18%, transparent);
}

.select { appearance: none; cursor: pointer; padding-right: 34px;
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 17px) 51%, calc(100% - 12px) 51%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

/* Área de upload */
.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 26px 20px;
  text-align: center;
  background: var(--surface-2);
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.dragging { border-color: var(--brand); background: var(--brand-soft); }
.dropzone strong { color: var(--brand); }

/* ---------------- Cartões ---------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-pad { padding: 22px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: var(--brand-soft);
  color: var(--brand);
  white-space: nowrap;
}
.badge-ok { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }
.badge-warn { background: color-mix(in srgb, var(--warn) 16%, transparent); color: #a86a04; }
.badge-neutral { background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); }

@media (prefers-color-scheme: dark) {
  .badge-warn { color: var(--warn); }
}

/* Aviso de topo (modo de armazenamento, erros, etc.) */
.notice {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  font-size: 13.5px;
}
.notice-warn { border-color: color-mix(in srgb, var(--warn) 45%, var(--border)); background: color-mix(in srgb, var(--warn) 9%, var(--surface)); }
.notice-danger { border-color: color-mix(in srgb, var(--danger) 45%, var(--border)); background: color-mix(in srgb, var(--danger) 8%, var(--surface)); }
.notice-icon { font-size: 16px; line-height: 1.3; }

/* ---------------- Site do aluno ---------------- */

.hero { padding: 56px 0 34px; text-align: center; }
.hero h1 { font-size: clamp(28px, 5vw, 40px); }
.hero p { color: var(--muted); margin-top: 12px; font-size: 16px; }

.steps { display: flex; justify-content: center; gap: 8px; margin: 26px 0 34px; flex-wrap: wrap; }
.step {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 15px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  font-size: 13px; font-weight: 600; color: var(--muted);
}
.step.active { border-color: var(--brand); color: var(--brand); background: var(--brand-soft); }
.step.done { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--border)); }
.step-num {
  width: 20px; height: 20px; border-radius: 50%;
  display: grid; place-items: center;
  background: currentColor; color: var(--surface);
  font-size: 11px; font-weight: 700;
}

.termos { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }

.termo-card {
  position: relative;
  text-align: left;
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font: inherit;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.termo-card:hover { transform: translateY(-3px); border-color: var(--brand); }
.termo-card h3 { font-size: 19px; margin-bottom: 6px; }
.termo-card .termo-num {
  width: 42px; height: 42px; border-radius: 12px;
  display: grid; place-items: center; margin-bottom: 14px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff; font-size: 18px; font-weight: 700;
}
.termo-card .arrow { position: absolute; top: 24px; right: 24px; color: var(--muted); font-size: 18px; }

/* Login */
.login-wrap { max-width: 400px; margin: 0 auto; }
.login-wrap .card-pad { padding: 28px; }
.login-hint {
  margin-top: 16px; padding: 11px 14px;
  border-radius: var(--radius-sm);
  background: var(--surface-2); border: 1px dashed var(--border);
  font-size: 13px; color: var(--muted); text-align: center;
}
.login-hint code { color: var(--brand); font-weight: 700; }

/* Lista de lições */
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; flex-wrap: wrap; margin-bottom: 16px;
}
.section-head h2 { font-size: 21px; }

.licoes { display: grid; gap: 12px; }

.licao {
  display: flex; align-items: center; gap: 15px;
  padding: 15px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: border-color .15s;
}
.licao:hover { border-color: color-mix(in srgb, var(--brand) 45%, var(--border)); }
.licao.destaque { border-color: var(--brand); background: linear-gradient(180deg, var(--brand-soft), var(--surface) 70%); }

.licao-icon {
  width: 42px; height: 42px; flex: none;
  border-radius: 11px; display: grid; place-items: center;
  font-size: 11px; font-weight: 800; letter-spacing: .04em;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--muted);
}
.licao-icon.pdf { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); border-color: transparent; }
.licao-icon.img { background: color-mix(in srgb, var(--brand-2) 15%, transparent); color: #0891b2; border-color: transparent; }

.licao-body { min-width: 0; flex: 1; }
.licao-title { font-weight: 650; font-size: 15px; }
.licao-meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 5px; font-size: 12.5px; color: var(--muted); }
.licao-actions { display: flex; gap: 8px; flex: none; }

.empty {
  padding: 46px 20px; text-align: center;
  border: 1.5px dashed var(--border); border-radius: var(--radius);
  color: var(--muted); background: var(--surface-2);
}
.empty-emoji { font-size: 30px; display: block; margin-bottom: 10px; }

/* Visualizador */
.viewer-backdrop {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(10, 9, 16, .72);
  backdrop-filter: blur(3px);
  display: grid; place-items: center;
  padding: 20px;
}
.viewer {
  width: min(980px, 100%); height: min(88vh, 900px);
  background: var(--surface); border-radius: var(--radius);
  display: flex; flex-direction: column; overflow: hidden;
  box-shadow: 0 24px 70px -18px rgba(0, 0, 0, .55);
}
.viewer-head {
  display: flex; align-items: center; gap: 12px;
  padding: 13px 18px; border-bottom: 1px solid var(--border);
}
.viewer-head .licao-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.viewer-body { flex: 1; background: var(--surface-2); overflow: auto; display: grid; place-items: center; }
.viewer-body iframe { width: 100%; height: 100%; border: 0; }
.viewer-body img { max-width: 100%; max-height: 100%; display: block; }

/* ---------------- Painel do professor ---------------- */

.painel { display: grid; grid-template-columns: 232px 1fr; min-height: calc(100vh - 62px); }

.sidebar { border-right: 1px solid var(--border); padding: 22px 14px; background: var(--surface); }
.sidebar-title { font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); padding: 0 12px; margin-bottom: 10px; }

.tab-btn {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 10px 12px; margin-bottom: 3px;
  border: 0; border-radius: var(--radius-sm);
  background: transparent; color: var(--muted);
  font: inherit; font-weight: 600; font-size: 14px;
  cursor: pointer; text-align: left;
  transition: background .15s, color .15s;
}
.tab-btn:hover { background: var(--surface-2); color: var(--text); }
.tab-btn.active { background: var(--brand-soft); color: var(--brand); }
.tab-icon { font-size: 16px; width: 20px; text-align: center; }

.painel-main { padding: 28px 30px 60px; overflow: auto; }
.painel-head { margin-bottom: 22px; }
.painel-head h1 { font-size: 24px; }
.painel-head p { color: var(--muted); margin-top: 5px; }

.grid-2 { display: grid; grid-template-columns: minmax(300px, 380px) 1fr; gap: 22px; align-items: start; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-bottom: 22px; }
.stat { padding: 17px 19px; }
.stat-value { font-size: 26px; font-weight: 700; letter-spacing: -.03em; }
.stat-label { font-size: 12.5px; color: var(--muted); margin-top: 2px; }

.form-grid { display: grid; gap: 14px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface);
  font: inherit; font-size: 13px; font-weight: 600; color: var(--muted);
  cursor: pointer; transition: all .15s;
}
.chip:hover { color: var(--text); }
.chip.active { background: var(--brand); border-color: var(--brand); color: #fff; }

/* Toast */
.toasts { position: fixed; bottom: 22px; right: 22px; z-index: 200; display: grid; gap: 10px; }
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 18px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: 0 12px 34px -12px rgba(0, 0, 0, .35);
  font-size: 14px; font-weight: 550;
  animation: toast-in .22s ease-out;
  max-width: 360px;
}
.toast.ok { border-left: 3px solid var(--ok); }
.toast.err { border-left: 3px solid var(--danger); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }

/* Barra de progresso do upload */
.progress { height: 5px; border-radius: 999px; background: var(--border); overflow: hidden; }
.progress > i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--brand), var(--brand-2)); transition: width .2s; }
/* O Supabase não reporta o andamento do upload, então a barra é indeterminada. */
.progress.indeterminada > i { width: 40%; animation: desliza 1.1s ease-in-out infinite; }
@keyframes desliza { 0% { transform: translateX(-100%); } 100% { transform: translateX(250%); } }

/* Rodapé */
.footer { border-top: 1px solid var(--border); margin-top: 60px; padding: 24px 0; color: var(--muted); font-size: 13px; text-align: center; }

/* ---------------- Responsivo ---------------- */

@media (max-width: 820px) {
  .painel { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--border); display: flex; gap: 6px; overflow-x: auto; padding: 12px; }
  .sidebar-title { display: none; }
  .tab-btn { width: auto; white-space: nowrap; margin: 0; }
  .painel-main { padding: 22px 18px 50px; }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .nav a { padding: 8px 10px; font-size: 13px; }
  .licao { flex-wrap: wrap; }
  .licao-actions { width: 100%; }
  .licao-actions .btn { flex: 1; }
  .form-row { grid-template-columns: 1fr; }
}