/* ===========================================================================
   FitForRiders — Design System (inspirado em Material Design 3)
   Temas: claro / escuro / conforme o sistema.
   =========================================================================== */

/* ---- Tokens: tema CLARO (por defeito) ---- */
:root {
  --primary: #216a4e;
  --on-primary: #ffffff;
  --primary-container: #a8f2cc;
  --on-primary-container: #00210f;

  --secondary-container: #cee9d9;
  --on-secondary-container: #0d1f17;

  --tertiary: #7d5700;             /* dourado para acentos/alertas suaves */
  --tertiary-container: #ffdea1;
  --on-tertiary-container: #271900;

  --surface: #fbfdf8;
  --surface-dim: #dbe0da;
  --surface-container: #eff2ec;
  --surface-container-high: #e9ece6;
  --on-surface: #191c1a;
  --on-surface-variant: #404943;
  --outline: #707974;
  --outline-variant: #c0c9c1;

  --error: #ba1a1a;
  --star: #f5a623;                 /* estrelas de segurança */

  --shadow-1: 0 1px 2px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.10);
  --shadow-2: 0 2px 6px rgba(0,0,0,.10), 0 6px 16px rgba(0,0,0,.08);

  color-scheme: light;
}

/* ---- Tokens: tema ESCURO — aplicado por escolha explícita ---- */
:root[data-theme="dark"] {
  --primary: #8bd6ac;
  --on-primary: #003824;
  --primary-container: #005138;
  --on-primary-container: #a8f2cc;

  --secondary-container: #344b3f;
  --on-secondary-container: #cee9d9;

  --tertiary: #f4bd48;
  --tertiary-container: #5f4100;
  --on-tertiary-container: #ffdea1;

  --surface: #101413;
  --surface-dim: #101413;
  --surface-container: #1d211f;
  --surface-container-high: #272b29;
  --on-surface: #e1e3df;
  --on-surface-variant: #bfc9c1;
  --outline: #8a938c;
  --outline-variant: #404943;

  --error: #ffb4ab;
  --star: #ffca4b;

  --shadow-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px rgba(0,0,0,.40);
  --shadow-2: 0 2px 6px rgba(0,0,0,.40), 0 6px 16px rgba(0,0,0,.34);

  color-scheme: dark;
}

/* ---- Tema conforme o SISTEMA (quando não há escolha explícita) ---- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --primary: #8bd6ac; --on-primary: #003824;
    --primary-container: #005138; --on-primary-container: #a8f2cc;
    --secondary-container: #344b3f; --on-secondary-container: #cee9d9;
    --tertiary: #f4bd48; --tertiary-container: #5f4100; --on-tertiary-container: #ffdea1;
    --surface: #101413; --surface-dim: #101413;
    --surface-container: #1d211f; --surface-container-high: #272b29;
    --on-surface: #e1e3df; --on-surface-variant: #bfc9c1;
    --outline: #8a938c; --outline-variant: #404943;
    --error: #ffb4ab; --star: #ffca4b;
    --shadow-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px rgba(0,0,0,.40);
    --shadow-2: 0 2px 6px rgba(0,0,0,.40), 0 6px 16px rgba(0,0,0,.34);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--surface);
  color: var(--on-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background .2s ease, color .2s ease;
}

.wrap { max-width: 900px; margin: 0 auto; padding: 0 16px; }

/* ---- Barra superior ---- */
.appbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
  border-bottom: 1px solid var(--outline-variant);
}
.appbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -.4px; }
.brand .dot { color: var(--primary); }
.brand svg { color: var(--primary); }

.icon-btn {
  width: 44px; height: 44px; border-radius: 999px; border: none; cursor: pointer;
  background: transparent; color: var(--on-surface-variant);
  display: grid; place-items: center; transition: background .15s ease;
}
.icon-btn:hover { background: var(--surface-container-high); }
.icon-btn svg { width: 22px; height: 22px; }

/* ---- Hero ---- */
.hero { padding: 26px 0 6px; }
.hero h1 { font-size: clamp(24px, 5vw, 34px); line-height: 1.15; letter-spacing: -.6px; margin: 0 0 8px; }
.hero p { color: var(--on-surface-variant); margin: 0; max-width: 60ch; }

/* ---- Segmented (as 3 funções) ---- */
.segmented {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px;
  background: var(--surface-container); border: 1px solid var(--outline-variant);
  border-radius: 999px; padding: 4px; margin: 20px 0 6px;
}
.segmented button {
  border: none; background: transparent; cursor: pointer;
  padding: 10px 8px; border-radius: 999px; font-size: 14px; font-weight: 600;
  color: var(--on-surface-variant); display: flex; align-items: center; justify-content: center; gap: 6px;
  transition: background .15s ease, color .15s ease;
}
.segmented button svg { width: 18px; height: 18px; }
.segmented button[aria-selected="true"] { background: var(--secondary-container); color: var(--on-secondary-container); }
.segmented button .lbl-full { display: inline; }
.mode-hint { color: var(--on-surface-variant); font-size: 13px; margin: 10px 2px 0; min-height: 18px; }

/* ---- Painel de entrada ---- */
.panel {
  background: var(--surface-container); border: 1px solid var(--outline-variant);
  border-radius: 20px; padding: 18px; margin: 12px 0 22px; box-shadow: var(--shadow-1);
}
.controls { display: flex; flex-wrap: wrap; gap: 14px; align-items: flex-end; }
.control { flex: 1 1 160px; min-width: 150px; }
.control.hidden { display: none; }
.control label { display: block; font-size: 12px; font-weight: 600; color: var(--on-surface-variant); margin-bottom: 6px; }

/* Campo de texto estilo "filled" */
.textfield {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface-container-high); border: 1px solid var(--outline-variant);
  border-radius: 14px; padding: 4px 14px; transition: border-color .15s ease;
}
.textfield:focus-within { border-color: var(--primary); }
.textfield input {
  width: 100%; border: none; background: transparent; color: var(--on-surface);
  font-size: 26px; font-weight: 700; padding: 8px 0; outline: none;
}
.textfield .unit {
  color: var(--on-surface-variant); font-weight: 600; font-size: 15px;
  background: transparent; border: 1px solid var(--outline-variant); border-radius: 8px;
  padding: 4px 10px; cursor: pointer; font-family: inherit; flex-shrink: 0;
  transition: border-color .15s ease, color .15s ease;
}
.textfield .unit:hover { border-color: var(--primary); color: var(--primary); }

select {
  width: 100%; padding: 14px; font-size: 15px; color: var(--on-surface);
  background: var(--surface-container-high); border: 1px solid var(--outline-variant);
  border-radius: 14px; outline: none; appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--on-surface-variant) 50%),
                    linear-gradient(135deg, var(--on-surface-variant) 50%, transparent 50%);
  background-position: calc(100% - 20px) 20px, calc(100% - 15px) 20px;
  background-size: 5px 5px, 5px 5px; background-repeat: no-repeat;
}
select:focus { border-color: var(--primary); }

.text-btn {
  background: none; border: none; color: var(--primary); font-weight: 600; cursor: pointer;
  font-size: 14px; padding: 8px 0 0; text-decoration: none;
}

/* ---- Guia como medir ---- */
.guide {
  display: none; margin-top: 14px; padding: 16px; border-radius: 14px;
  background: var(--surface-container-high); font-size: 14px; color: var(--on-surface-variant);
}
.guide.open { display: block; }
.guide ol { margin: 8px 0 0; padding-left: 20px; }
.guide li { margin-bottom: 4px; }
.guide strong { color: var(--on-surface); }

/* ---- Cabeçalho de resultados ---- */
.results-head { display: flex; justify-content: space-between; align-items: baseline; margin: 4px 2px 14px; }
.results-head h2 { font-size: 18px; margin: 0; }
.results-head .count { color: var(--on-surface-variant); font-size: 14px; }

/* ---- Grelha de cartões ---- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 16px; }

.card {
  background: var(--surface-container); border: 1px solid var(--outline-variant);
  border-radius: 20px; padding: 18px; display: flex; flex-direction: column;
  transition: box-shadow .15s ease, transform .12s ease;
}
.card:hover { box-shadow: var(--shadow-2); transform: translateY(-2px); }

/* Foto do produto (alojada no site da marca; some se falhar) */
.card-photo {
  margin: -6px -6px 14px; border-radius: 14px; overflow: hidden;
  background: var(--surface-container-high); aspect-ratio: 4 / 3;
  display: grid; place-items: center;
}
.card-photo img { width: 100%; height: 100%; object-fit: contain; padding: 8px; }

.card-top { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.brand-badge {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  font-weight: 800; color: var(--on-primary-container); background: var(--primary-container); font-size: 15px; flex-shrink: 0;
}
.card h3 { margin: 0; font-size: 16px; line-height: 1.2; }
.card .brand-name { color: var(--on-surface-variant); font-size: 13px; }

.size-pill {
  display: inline-flex; align-items: center; gap: 8px; align-self: flex-start;
  background: var(--primary-container); color: var(--on-primary-container); font-weight: 700; font-size: 14px;
  padding: 7px 13px; border-radius: 999px; margin-bottom: 12px;
}
.size-pill small { font-weight: 500; opacity: .8; }
.size-pill.tight { background: var(--tertiary-container); color: var(--on-tertiary-container); }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.chip {
  font-size: 12px; color: var(--on-surface-variant); background: var(--surface-container-high);
  border: 1px solid var(--outline-variant); padding: 4px 10px; border-radius: 8px;
}
.chip.safety { color: var(--on-surface); }
.chip.safety .stars { color: var(--star); letter-spacing: 1px; }
.chip.example { border-style: dashed; opacity: .9; }
.chip.example::after { content: " · example"; opacity: .7; }

.highlights { list-style: none; padding: 0; margin: 0 0 16px; font-size: 14px; color: var(--on-surface-variant); }
.highlights li { padding-left: 20px; position: relative; margin-bottom: 4px; }
.highlights li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }

.card-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.price { font-size: 19px; font-weight: 800; }
.price small { display: block; font-size: 12px; color: var(--on-surface-variant); font-weight: 500; }
.btn-filled {
  background: var(--primary); color: var(--on-primary); text-decoration: none; font-weight: 700; font-size: 14px;
  padding: 11px 18px; border-radius: 999px; white-space: nowrap; border: none; cursor: pointer;
}
.btn-filled:hover { filter: brightness(1.05); box-shadow: var(--shadow-1); }

.src-link {
  display: inline-block; margin-top: 12px; font-size: 12px; font-weight: 600;
  color: var(--primary); text-decoration: none;
}
.src-link:hover { text-decoration: underline; }
.src-link.unverified { color: var(--on-surface-variant); }
.price.no-price { font-size: 15px; color: var(--on-surface-variant); }

/* ---- Validar: painel único ---- */
.validate-result { margin-top: 4px; }
.validate-result .big {
  font-size: 22px; font-weight: 800; margin: 0 0 6px;
}
.validate-result .fit-good { color: var(--primary); }
.validate-result .fit-tight { color: var(--tertiary); }
.validate-result .fit-none { color: var(--error); }

/* ---- Comparar: tabela ---- */
.table-scroll { overflow-x: auto; border: 1px solid var(--outline-variant); border-radius: 16px; }
table.compare { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
table.compare th, table.compare td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--outline-variant); }
table.compare thead th { background: var(--surface-container); font-size: 12px; color: var(--on-surface-variant); text-transform: uppercase; letter-spacing: .4px; }
table.compare tbody tr:last-child td { border-bottom: none; }
table.compare tbody tr:hover { background: var(--surface-container); }
table.compare .yoursize { font-weight: 700; color: var(--primary); }
table.compare .stars { color: var(--star); }
table.compare a { color: var(--primary); font-weight: 600; text-decoration: none; }

/* ---- Estado vazio ---- */
.empty {
  text-align: center; padding: 40px 20px; color: var(--on-surface-variant);
  background: var(--surface-container); border-radius: 20px; border: 1px dashed var(--outline);
}
.empty strong { color: var(--on-surface); }

/* ---- Secção "How it works" (conteúdo indexável) ---- */
.about { margin-top: 36px; padding-top: 8px; border-top: 1px solid var(--outline-variant); }
.about h2 { font-size: 17px; margin: 18px 0 8px; }
.about p { color: var(--on-surface-variant); font-size: 14px; max-width: 72ch; margin: 0 0 12px; }
.about strong { color: var(--on-surface); }

/* ---- Rodapé ---- */
footer.site { border-top: 1px solid var(--outline-variant); margin-top: 40px; padding: 22px 0 60px; color: var(--on-surface-variant); font-size: 13px; }
footer.site a { color: var(--primary); }
footer.site .disclaimer { display: flex; gap: 8px; align-items: flex-start; margin-top: 8px; }

@media (max-width: 560px) {
  .segmented button .lbl-full { display: none; }
  .segmented button { padding: 12px 4px; }
  .textfield input { font-size: 22px; }
}