/* ==========================================================================
   Impacta CLC — Design System
   Paleta derivada de mba.impacta.edu.br (Cloud Computing & DevOps)
   ========================================================================== */

/* --- Tokens ------------------------------------------------------------- */
:root {
  /* marca */
  --navy-900: #060911;
  --navy-800: #0b1224;
  --navy-700: #10192f;
  --navy-600: #16203a;
  --blue-600: #116fff;
  --blue-500: #4972f3;
  --cyan-400: #2fe0ff;
  --mint-400: #3cffb0;
  --violet-400: #9c6bff;

  /* superfícies (tema claro) */
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-2: #f8fafd;
  --border: #e3e9f2;
  --border-strong: #cfd9e8;

  /* texto */
  --text: #10192f;
  --text-muted: #5b6b82;
  --text-faint: #8a9bb2;
  --on-dark: #eaf0fb;
  --on-dark-muted: #a8b7cd;

  /* semântico */
  --danger: #e5484d;
  --danger-soft: #fdeced;
  --warn: #f5a524;
  --warn-soft: #fff6e6;
  --ok: #12a87a;
  --ok-soft: #e6f7f1;

  /* gradientes */
  --grad-brand: linear-gradient(135deg, var(--blue-600) 0%, var(--blue-500) 45%, var(--cyan-400) 100%);
  --grad-text: linear-gradient(100deg, var(--cyan-400) 0%, #7ea8ff 45%, var(--violet-400) 100%);

  /* forma */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 18px;
  --r-xl: 26px;
  --r-full: 999px;

  --shadow-sm: 0 1px 2px rgba(16, 25, 47, .06), 0 1px 3px rgba(16, 25, 47, .04);
  --shadow-md: 0 4px 14px rgba(16, 25, 47, .08), 0 1px 3px rgba(16, 25, 47, .04);
  --shadow-lg: 0 18px 44px rgba(16, 25, 47, .14), 0 4px 12px rgba(16, 25, 47, .06);
  --ring: 0 0 0 3px rgba(47, 224, 255, .38);

  --header-h: 72px;
  --ease: cubic-bezier(.22, .68, .36, 1);
}

/* Tema escuro: segue o sistema, a menos que o usuário tenha escolhido explicitamente. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #070c18;
    --surface: #0f1729;
    --surface-2: #131d33;
    --border: #1e2b45;
    --border-strong: #2b3b59;
    --text: #eaf0fb;
    --text-muted: #a3b2c9;
    --text-faint: #7d8ca6;
    --danger-soft: #2a1418;
    --warn-soft: #2a2011;
    --ok-soft: #0d2620;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, .45);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, .55);
  }
}

:root[data-theme="dark"] {
    --bg: #070c18;
    --surface: #0f1729;
    --surface-2: #131d33;
    --border: #1e2b45;
    --border-strong: #2b3b59;
    --text: #eaf0fb;
    --text-muted: #a3b2c9;
    --text-faint: #7d8ca6;
    --danger-soft: #2a1418;
    --warn-soft: #2a2011;
    --ok-soft: #0d2620;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, .45);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, .55);
}

/* --- Reset -------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -.02em; font-weight: 700; }
p { margin: 0; }
a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -60px;
  z-index: 200;
  padding: .6rem 1rem;
  border-radius: var(--r-sm);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-md);
  transition: top .18s var(--ease);
}
.skip-link:focus { top: 12px; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* --- Layout ------------------------------------------------------------- */
.container {
  width: min(1180px, 100% - 2.5rem);
  margin-inline: auto;
}
.container--narrow { width: min(760px, 100% - 2.5rem); }

.page { flex: 1 0 auto; padding-block: clamp(2rem, 5vw, 3.5rem); }

.page-head {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1.75rem;
}
.page-head h1 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
.page-head .eyebrow { margin-bottom: .4rem; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue-600);
}
.eyebrow::before {
  content: "";
  width: 22px; height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
}
.subtitle { color: var(--text-muted); margin-top: .5rem; max-width: 62ch; }

/* --- Navbar ------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 18, 36, .92);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.navbar__inner {
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .75rem;
  color: var(--on-dark);
  text-decoration: none;
  margin-right: auto;
}
.brand:hover { text-decoration: none; }
.brand__mark { width: 38px; height: 38px; flex: none; }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-weight: 700; font-size: 1.02rem; letter-spacing: -.01em; }
.brand__tag {
  font-size: .66rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-400);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: .25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  display: block;
  padding: .5rem .9rem;
  border-radius: var(--r-full);
  color: var(--on-dark-muted);
  font-size: .93rem;
  font-weight: 500;
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, .08); text-decoration: none; }
.nav-links a[aria-current="page"] { color: #fff; background: rgba(47, 224, 255, .14); }

/* o botão dentro da navegação mantém o layout de .btn */
.nav-links a.btn {
  display: inline-flex;
  padding: .45rem 1rem;
  color: #fff;
  margin-left: .35rem;
}
.nav-links a.btn:hover { background: rgba(255, 255, 255, .18); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  flex: none;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, .06);
  color: var(--on-dark);
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}
.theme-toggle:hover { background: rgba(255, 255, 255, .16); color: var(--cyan-400); }
.theme-toggle svg { width: 19px; height: 19px; }
.theme-toggle .icon-dark { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-dark { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-light { display: none; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--on-dark);
  cursor: pointer;
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }
  /* o painel do menu transborda a navbar; com backdrop-filter no pai ele seria
     composto junto ao fundo desfocado e apareceria translúcido */
  .navbar {
    background: var(--navy-800);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
  .nav-links {
    position: absolute;
    inset: var(--header-h) 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: .2rem;
    padding: .75rem 1.25rem 1.1rem;
    background: var(--navy-800);
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { padding: .7rem .9rem; border-radius: var(--r-sm); }
}

/* --- Botões ------------------------------------------------------------- */
.btn {
  --btn-bg: var(--surface);
  --btn-fg: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  padding: .72rem 1.4rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-full);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font: inherit;
  font-size: .95rem;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease),
              background-color .18s var(--ease), border-color .18s var(--ease), filter .18s var(--ease);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }
.btn svg { width: 18px; height: 18px; flex: none; }

.btn--primary {
  border-color: transparent;
  background: var(--grad-brand);
  color: #fff;
  box-shadow: 0 8px 20px rgba(17, 111, 255, .28);
}
.btn--primary:hover { filter: brightness(1.06); box-shadow: 0 12px 28px rgba(17, 111, 255, .36); }

.btn--ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn--ghost:hover { background: var(--surface-2); }

.btn--on-dark {
  background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .22);
  color: #fff;
  backdrop-filter: blur(6px);
}
.btn--on-dark:hover { background: rgba(255, 255, 255, .16); }

.btn--danger { background: var(--danger); border-color: transparent; color: #fff; }
.btn--danger:hover { filter: brightness(1.06); box-shadow: 0 10px 24px rgba(229, 72, 77, .3); }

.btn--danger-soft { background: var(--danger-soft); border-color: transparent; color: var(--danger); }
.btn--danger-soft:hover { background: var(--danger); color: #fff; }

.btn--sm { padding: .42rem .95rem; font-size: .85rem; }
.btn--lg { padding: .95rem 1.9rem; font-size: 1.05rem; }
.btn--block { width: 100%; }

/* --- Cards -------------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}
.card__body { padding: clamp(1.25rem, 3vw, 2rem); }
.card__head {
  padding: 1.25rem clamp(1.25rem, 3vw, 2rem);
  border-bottom: 1px solid var(--border);
}
.card__head h2 { font-size: 1.15rem; }
.card__foot {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  align-items: center;
  padding: 1.25rem clamp(1.25rem, 3vw, 2rem);
  border-top: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 0 0 var(--r-lg) var(--r-lg);
}
.card__foot .spacer { margin-left: auto; }

/* --- Hero --------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: var(--navy-800);
  color: var(--on-dark);
  padding-block: clamp(3.5rem, 9vw, 6.5rem);
}
.hero::before {
  content: "";
  position: absolute;
  inset: -30%;
  z-index: -2;
  background:
    radial-gradient(38% 46% at 18% 22%, rgba(17, 111, 255, .55) 0%, transparent 70%),
    radial-gradient(34% 42% at 82% 18%, rgba(47, 224, 255, .38) 0%, transparent 70%),
    radial-gradient(40% 50% at 68% 88%, rgba(156, 107, 255, .38) 0%, transparent 70%),
    radial-gradient(30% 38% at 12% 92%, rgba(60, 255, 176, .22) 0%, transparent 70%);
  filter: blur(10px);
  animation: drift 22s ease-in-out infinite alternate;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(75% 65% at 50% 40%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(75% 65% at 50% 40%, #000 30%, transparent 100%);
}
@keyframes drift {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to   { transform: translate3d(3%, 2%, 0) scale(1.08); }
}

.hero__inner { max-width: 780px; }
.hero .eyebrow { color: var(--cyan-400); }
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.9rem);
  letter-spacing: -.035em;
  margin-block: .9rem 1.1rem;
}
.hero h1 .grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead {
  font-size: clamp(1.02rem, 2vw, 1.2rem);
  color: var(--on-dark-muted);
  max-width: 60ch;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 2rem;
}

/* --- Grid de features --------------------------------------------------- */
.grid { display: grid; gap: 1.25rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.feature {
  padding: 1.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
}
.feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature__icon {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: var(--r-md);
  margin-bottom: 1rem;
  background: linear-gradient(135deg, rgba(17, 111, 255, .14), rgba(47, 224, 255, .18));
  color: var(--blue-600);
}
.feature__icon svg { width: 22px; height: 22px; }
.feature h3 { font-size: 1.06rem; margin-bottom: .4rem; }
.feature p { color: var(--text-muted); font-size: .94rem; }

/* Cards de tópicos da disciplina — cada um com seu tom da paleta */
.grid--topics { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.topic {
  --tone: var(--blue-600);
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
}
.topic::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--tone), transparent);
}
.topic:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--tone) 40%, var(--border));
}
.topic--cyan { --tone: var(--cyan-400); }
.topic--mint { --tone: var(--mint-400); }
.topic--violet { --tone: var(--violet-400); }

.topic__icon {
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--r-md);
  margin-bottom: 1rem;
  background: color-mix(in srgb, var(--tone) 16%, transparent);
  color: var(--tone);
}
.topic__icon svg { width: 22px; height: 22px; }
.topic h3 { font-size: 1rem; margin-bottom: .4rem; }
.topic p { font-size: .88rem; color: var(--text-muted); }

/* o ciano e o menta precisam escurecer para manter contraste no tema claro */
:root:not([data-theme="dark"]) .topic--cyan .topic__icon { color: #0b93b8; }
:root:not([data-theme="dark"]) .topic--mint .topic__icon { color: #0f9c6c; }

.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section__head { max-width: 62ch; margin-bottom: 2rem; }
.section__head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); margin-block: .6rem .6rem; }

/* --- Toolbar ------------------------------------------------------------ */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  align-items: center;
  margin-bottom: 1.25rem;
}
.search {
  position: relative;
  flex: 1 1 260px;
  max-width: 380px;
}
.search svg {
  position: absolute;
  left: 14px; top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 18px;
  color: var(--text-faint);
  pointer-events: none;
}
.search input {
  width: 100%;
  padding: .7rem 1rem .7rem 2.75rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-full);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: .94rem;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.search input:focus { outline: none; border-color: var(--cyan-400); box-shadow: var(--ring); }

.counter {
  font-size: .88rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.toolbar .spacer { margin-left: auto; }

/* --- Tabela ------------------------------------------------------------- */
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.table-scroll { overflow-x: auto; }

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: .94rem;
}
table.data thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 0;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  text-align: left;
  white-space: nowrap;
}
table.data thead th .th-label,
table.data thead th button {
  display: flex;
  align-items: center;
  gap: .35rem;
  width: 100%;
  padding: .85rem 1rem;
  border: 0;
  background: none;
  font: inherit;
  font-size: .74rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-muted);
  text-align: left;
}
table.data thead th button { cursor: pointer; }
table.data thead th button:hover { color: var(--blue-600); }
table.data thead th button .arrow { opacity: 0; transition: opacity .15s var(--ease); }
table.data thead th[aria-sort] button .arrow { opacity: 1; color: var(--blue-600); }
table.data thead th[aria-sort="descending"] button .arrow { transform: rotate(180deg); }

table.data tbody td {
  padding: .85rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  vertical-align: middle;
}
table.data tbody tr { transition: background-color .15s var(--ease); }
table.data tbody tr:hover { background: var(--surface-2); }
table.data tbody tr:last-child td { border-bottom: 0; }
table.data td.col-actions { text-align: right; white-space: nowrap; }

.person { display: flex; align-items: center; gap: .75rem; min-width: 190px; }
.avatar {
  width: 36px; height: 36px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .02em;
  text-transform: uppercase;
}
.person__name { color: var(--text); font-weight: 600; }
.person__mail { font-size: .82rem; color: var(--text-faint); }

.tag {
  display: inline-block;
  padding: .18rem .6rem;
  border-radius: var(--r-full);
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* tabela vira lista de cards no mobile */
@media (max-width: 780px) {
  table.data thead { display: none; }
  table.data, table.data tbody, table.data tr, table.data td { display: block; width: 100%; }
  table.data tbody tr {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }
  table.data tbody td {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    padding: .3rem 0;
    border: 0;
    text-align: right;
  }
  table.data tbody td::before {
    content: attr(data-label);
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text-faint);
    text-align: left;
  }
  table.data tbody td.col-person::before { display: none; }
  table.data tbody td.col-person { padding-bottom: .7rem; }
  table.data td.col-actions { padding-top: .8rem; }
}

/* --- Empty state -------------------------------------------------------- */
.empty {
  padding: clamp(2.5rem, 7vw, 4.5rem) 1.5rem;
  text-align: center;
}
.empty__art {
  width: 84px; height: 84px;
  margin: 0 auto 1.25rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(17, 111, 255, .12), rgba(156, 107, 255, .14));
  color: var(--blue-600);
}
.empty__art svg { width: 36px; height: 36px; }
.empty h2 { font-size: 1.25rem; margin-bottom: .5rem; }
.empty p { color: var(--text-muted); margin-bottom: 1.5rem; }

/* --- Formulários -------------------------------------------------------- */
.form-grid {
  display: grid;
  gap: 1.15rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.field { display: flex; flex-direction: column; gap: .4rem; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: .88rem; font-weight: 600; color: var(--text); }
.field .req { color: var(--danger); margin-left: .15rem; }
.field input, .field select, .field textarea {
  width: 100%;
  padding: .72rem .9rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: .95rem;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease), background-color .18s var(--ease);
}
.field input::placeholder { color: var(--text-faint); }
.field input:hover { border-color: var(--text-faint); }
.field input:focus { outline: none; border-color: var(--cyan-400); box-shadow: var(--ring); }
.field .hint { font-size: .8rem; color: var(--text-faint); }

/* --- Alertas ------------------------------------------------------------ */
.alert {
  display: flex;
  gap: .75rem;
  align-items: flex-start;
  padding: .9rem 1.1rem;
  border-radius: var(--r-md);
  font-size: .92rem;
  border: 1px solid transparent;
}
.alert svg { width: 20px; height: 20px; flex: none; margin-top: .1rem; }
.alert--warn { background: var(--warn-soft); border-color: rgba(245, 165, 36, .3); color: #8a5a00; }
.alert--danger { background: var(--danger-soft); border-color: rgba(229, 72, 77, .3); color: #a1272b; }
.alert--info { background: rgba(17, 111, 255, .07); border-color: rgba(17, 111, 255, .22); color: var(--blue-600); }
.alert ul { margin: .25rem 0 0; padding-left: 1.1rem; }
.alert strong { display: block; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .alert--warn { color: #f5c778; }
  :root:not([data-theme="light"]) .alert--danger { color: #ff9ea1; }
}
:root[data-theme="dark"] .alert--warn { color: #f5c778; }
:root[data-theme="dark"] .alert--danger { color: #ff9ea1; }

/* --- Diálogo ------------------------------------------------------------ */
dialog.modal {
  width: min(440px, calc(100vw - 2.5rem));
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-lg);
}
dialog.modal::backdrop { background: rgba(6, 9, 17, .55); backdrop-filter: blur(3px); }
dialog.modal[open] { animation: pop .18s var(--ease); }
@keyframes pop { from { opacity: 0; transform: translateY(10px) scale(.98); } }
.modal__body { padding: 1.6rem 1.6rem 1.2rem; }
.modal__body h2 { font-size: 1.15rem; margin-bottom: .5rem; }
.modal__body p { color: var(--text-muted); font-size: .94rem; }
.modal__foot {
  display: flex;
  justify-content: flex-end;
  gap: .6rem;
  padding: 1rem 1.6rem 1.4rem;
}
.modal__icon {
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--danger-soft);
  color: var(--danger);
  margin-bottom: 1rem;
}

/* --- Página de erro ----------------------------------------------------- */
.error-page {
  display: grid;
  place-items: center;
  text-align: center;
  padding-block: clamp(3rem, 10vw, 6rem);
}
.error-page__code {
  font-size: clamp(4.5rem, 16vw, 9rem);
  font-weight: 800;
  letter-spacing: -.05em;
  line-height: 1;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.error-page h1 { font-size: clamp(1.4rem, 3.5vw, 2rem); margin-block: .75rem .75rem; }
.error-page p { color: var(--text-muted); max-width: 48ch; margin-inline: auto; }
.error-page .btn { margin-top: 2rem; }

/* --- Rodapé ------------------------------------------------------------- */
.footer {
  flex: none;
  margin-top: auto;
  background: var(--navy-800);
  color: var(--on-dark-muted);
  border-top: 1px solid rgba(255, 255, 255, .08);
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: center;
  justify-content: space-between;
  padding-block: 2rem;
  font-size: .88rem;
}
.footer a { color: var(--cyan-400); }
.footer__brand { display: flex; align-items: center; gap: .65rem; color: var(--on-dark); font-weight: 600; }
.footer__brand svg { width: 28px; height: 28px; }

/* --- Utilitários -------------------------------------------------------- */
.stack { display: flex; flex-direction: column; gap: 1.25rem; }
.row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }
.mt-lg { margin-top: 2rem; }
.text-muted { color: var(--text-muted); }
[hidden] { display: none !important; }

/* Animação de entrada */
.reveal { animation: rise .5s var(--ease) both; }
.reveal:nth-child(2) { animation-delay: .06s; }
.reveal:nth-child(3) { animation-delay: .12s; }
.reveal:nth-child(4) { animation-delay: .18s; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }