/* ============================================================
   DESIGN SYSTEM — Liga da Aprendizagem
   Metodologia: BEM | Mobile-first | CSS Custom Properties
   ============================================================ */

/* ------------------------------------------------------------
   1. RESET & BASE
   ------------------------------------------------------------ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Open Sans', Helvetica, Arial, sans-serif;
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
}

/* ------------------------------------------------------------
   2. DESIGN TOKENS — Cores Globais
   ------------------------------------------------------------ */
:root {
  /* Cores da marca */
  --color-navy:        #101535;
  --color-navy-dark:   #0a0f22;
  --color-navy-light:  #1c2556;

  --color-white:       #ffffff;
  --color-gray-50:     #f8f9fb;
  --color-gray-100:    #f1f3f7;
  --color-gray-200:    #e4e8f0;
  --color-gray-400:    #9aa3b8;
  --color-gray-600:    #6b7494;
  --color-gray-800:    #2e3451;
  --color-gray-900:    #1a1f3a;

  --color-text:        #1a1f3a;
  --color-text-muted:  #6b7494;
  --color-text-light:  #9aa3b8;

  /* Accent padrão (home/global) — violet */
  --color-accent:          #7B2FBE;
  --color-accent-light:    #9d4ee3;
  --color-accent-dark:     #5a0fa0;
  --color-accent-gradient: linear-gradient(135deg, #5600a8 0%, #8300e9 100%);

  /* Feedback */
  --color-success: #1db87a;
  --color-warning: #f59e0b;
  --color-danger:  #ef4444;

  /* --------------------------------------------------------
     Tipografia — NUNCA varia entre páginas
     -------------------------------------------------------- */
  --font-heading: 'Montserrat', Helvetica, Arial, sans-serif;
  --font-body:    'Open Sans', Helvetica, Arial, sans-serif;

  --text-xs:   0.675rem;    /* 12px */
  --text-sm:   0.7rem;   /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */
  --text-xl:   1.25rem;    /* 20px */
  --text-2xl:  1.5rem;     /* 24px */
  --text-3xl:  1.875rem;   /* 30px */
  --text-4xl:  2.25rem;    /* 36px */
  --text-5xl:  3rem;       /* 48px */
  --text-6xl:  3.75rem;    /* 60px */

  --weight-regular:    400;
  --weight-semibold:   600;
  --weight-bold:       700;
  --weight-extrabold:  800;
  --weight-black:      900;

  --leading-tight:   1.2;
  --leading-snug:    1.35;
  --leading-normal:  1.6;
  --leading-relaxed: 1.75;

  /* --------------------------------------------------------
     Espaçamento — escala base 8px
     -------------------------------------------------------- */
  --space-1:   0.25rem;  /*  4px */
  --space-2:   0.5rem;   /*  8px */
  --space-3:   0.75rem;  /* 12px */
  --space-4:   1rem;     /* 16px */
  --space-5:   1.25rem;  /* 20px */
  --space-6:   1.5rem;   /* 24px */
  --space-8:   2rem;     /* 32px */
  --space-10:  2.5rem;   /* 40px */
  --space-12:  3rem;     /* 48px */
  --space-16:  4rem;     /* 64px */
  --space-20:  5rem;     /* 80px */
  --space-24:  6rem;     /* 96px */
  --space-32:  8rem;     /* 128px */

  /* --------------------------------------------------------
     Bordas, sombras, raios
     -------------------------------------------------------- */
  --radius-sm:   2px;
  --radius-md:   4px;
  --radius-lg:   8px;
  --radius-xl:   12px;
  --radius-full: 9999px;
  --radius-btn:  6px;

  --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:  0 10px 40px rgba(0,0,0,.14), 0 4px 12px rgba(0,0,0,.08);
  --shadow-xl:  0 20px 60px rgba(0,0,0,.18);

  /* --------------------------------------------------------
     Transições
     -------------------------------------------------------- */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms ease;
}

/* ------------------------------------------------------------
   3. PALETA POR CURSO (accent varia, tipografia não)
   ------------------------------------------------------------ */
body.curso--avaliando-dislexia {
  --color-accent:          #7B2FBE;
  --color-accent-light:    #9d4ee3;
  --color-accent-dark:     #5a0fa0;
  --color-accent-gradient: linear-gradient(135deg, #5600a8 0%, #8300e9 100%);
}

body.curso--quebra-cabeca {
  --color-accent:          #1A6FA8;
  --color-accent-light:    #2d8fcf;
  --color-accent-dark:     #0d4f7a;
  --color-accent-gradient: linear-gradient(135deg, #0d4f7a 0%, #2d8fcf 100%);
}

body.curso--mapa-conceitual {
  --color-accent:          #0f7a5a;
  --color-accent-light:    #18a87a;
  --color-accent-dark:     #085c42;
  --color-accent-gradient: linear-gradient(135deg, #085c42 0%, #18a87a 100%);
}

body.curso--pcl-r {
  --color-accent:          #c0392b;
  --color-accent-light:    #e05244;
  --color-accent-dark:     #96231a;
  --color-accent-gradient: linear-gradient(135deg, #96231a 0%, #e05244 100%);
}

body.curso--tdl-aspectos {
  --color-accent:          #8B1FA8;
  --color-accent-light:    #b040d0;
  --color-accent-dark:     #650f80;
  --color-accent-gradient: linear-gradient(135deg, #650f80 0%, #b040d0 100%);
}

body.curso--intervencao-tdl {
  --color-accent:          #16a085;
  --color-accent-light:    #1dc9a9;
  --color-accent-dark:     #0d7060;
  --color-accent-gradient: linear-gradient(135deg, #0d7060 0%, #1dc9a9 100%);
}

body.curso--processamento-visual {
  --color-accent:          #2471a3; 
  --color-accent-light:    #3498d8;
  --color-accent-dark:     #1a5276;
  --color-accent-gradient: linear-gradient(135deg, #1a5276 0%, #3498d8 100%);
}

body.curso--dnoi-dnei {
  --color-accent:          #7d3c98;
  --color-accent-light:    #a254c2;
  --color-accent-dark:     #5b2b72;
  --color-accent-gradient: linear-gradient(135deg, #5b2b72 0%, #a254c2 100%);
}

body.curso--rti {
  --color-accent:          #d35400;
  --color-accent-light:    #e67e22;
  --color-accent-dark:     #a04000;
  --color-accent-gradient: linear-gradient(135deg, #a04000 0%, #e67e22 100%);
}

body.curso--rhei {
  --color-accent:          #c77a00;
  --color-accent-light:    #e9a219;
  --color-accent-dark:     #8f5800;
  --color-accent-gradient: linear-gradient(135deg, #8f5800 0%, #e9a219 100%);
}

body.curso--ippl {
  --color-accent:          #148f77;
  --color-accent-light:    #1abc9c;
  --color-accent-dark:     #0e6655;
  --color-accent-gradient: linear-gradient(135deg, #0e6655 0%, #1abc9c 100%);
}

body.curso--intervencao-ei {
  --color-accent:          #b03a8e;
  --color-accent-light:    #d25aad;
  --color-accent-dark:     #822a68;
  --color-accent-gradient: linear-gradient(135deg, #822a68 0%, #d25aad 100%);
}

body.ebook--rti {
  --color-accent:          #2c3e50;
  --color-accent-light:    #4a6274;
  --color-accent-dark:     #1a252f;
  --color-accent-gradient: linear-gradient(135deg, #1a252f 0%, #4a6274 100%);
}

body.ebook--funcoes-executivas {
  --color-accent:          #d35400;
  --color-accent-light:    #e67e22;
  --color-accent-dark:     #a04000;
  --color-accent-gradient: linear-gradient(135deg, #a04000 0%, #e67e22 100%);
}

/* ------------------------------------------------------------
   4. TIPOGRAFIA
   ------------------------------------------------------------ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: var(--leading-snug);
  color: var(--color-navy);
}

h1 { font-size: var(--text-4xl); font-weight: var(--weight-black); }
h2 { font-size: var(--text-3xl); font-weight: var(--weight-extrabold); }
h3 { font-size: var(--text-2xl); font-weight: var(--weight-bold); }
h4 { font-size: var(--text-xl);  font-weight: var(--weight-bold); }
h5 { font-size: var(--text-lg);  font-weight: var(--weight-semibold); }
h6 { font-size: var(--text-base); font-weight: var(--weight-semibold); }

@media (min-width: 768px) {
  h1 { font-size: var(--text-5xl); }
  h2 { font-size: var(--text-4xl); }
  h3 { font-size: var(--text-3xl); }
}

@media (min-width: 1024px) {
  h1 { font-size: var(--text-6xl); }
}

p { margin-bottom: var(--space-4); }
p:last-child { margin-bottom: 0; }

.text--hero {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-black);
  line-height: var(--leading-tight);
}

@media (min-width: 768px) {
  .text--hero { font-size: var(--text-5xl); }
}
@media (min-width: 1024px) {
  .text--hero { font-size: var(--text-6xl); }
}

.text--subtitle {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .text--subtitle { font-size: var(--text-xl); }
}

.text--lead {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.text--small { font-size: var(--text-sm); }
.text--muted { color: var(--color-text-muted); }
.text--white { color: var(--color-white); }
.text--accent { color: var(--color-accent); }
.text--center { text-align: center; }

/* Label de seção */
.section-label {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

/* ------------------------------------------------------------
   5. BOTÕES
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  line-height: 1;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-btn);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-base),
              border-color var(--transition-base),
              color var(--transition-base),
              transform var(--transition-fast),
              box-shadow var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover  { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

/* Primário */
.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}
.btn--primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  box-shadow: 0 6px 24px rgba(123,47,190,.35);
}

/* Secundário (outline) */
.btn--secondary {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn--secondary:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* Ghost (para fundos escuros) */
.btn--ghost {
  background-color: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,.5);
}
.btn--ghost:hover {
  background-color: rgba(255,255,255,.1);
  border-color: var(--color-white);
}

/* Branco (para fundos coloridos) */
.btn--white {
  background-color: var(--color-white);
  color: var(--color-accent);
  border-color: var(--color-white);
}
.btn--white:hover {
  background-color: transparent;
  color: var(--color-white);
  box-shadow: 0 6px 24px rgba(0,0,0,.2);
}

/* Tamanhos */
.btn--sm {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-4);
}
.btn--lg {
  font-size: var(--text-lg);
  padding: var(--space-5) var(--space-10);
}

/* Full width */
.btn--full { width: 100%; }

/* ------------------------------------------------------------
   6. CARDS
   ------------------------------------------------------------ */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card__body    { padding: var(--space-6); }
.card__footer  { padding: var(--space-4) var(--space-6); border-top: 1px solid var(--color-gray-200); }
.card__title   { font-family: var(--font-heading); font-weight: var(--weight-bold); font-size: var(--text-lg); margin-bottom: var(--space-3); color: var(--color-navy); }
.card__text    { font-size: var(--text-sm); color: var(--color-text-muted); line-height: var(--leading-relaxed); }

/* Card com borda colorida no topo */
.card--accent-top {
  border-top: 4px solid var(--color-accent);
}

/* Card de feature (ícone + título + texto) */
.card--feature {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  background: var(--color-white);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.card--feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card__icon {
  width: 64px;
  height: 64px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-5);
  font-size: 1.75rem;
  color: var(--color-white);
}

/* ------------------------------------------------------------
   7. BADGES / TAGS
   ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  background: rgba(123,47,190,.1);
  color: var(--color-accent);
}

.badge--white {
  background: rgba(255,255,255,.15);
  color: var(--color-white);
}

/* ------------------------------------------------------------
   8. LISTA COM CHECK
   ------------------------------------------------------------ */
.check-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.check-list__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

.check-list__icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 12px;
  margin-top: 2px;
}

/* ------------------------------------------------------------
   9. CAIXA DE PREÇO
   ------------------------------------------------------------ */
.price-box {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-xl);
  border-top: 6px solid var(--color-accent);
  text-align: center;
}

.price-box__from {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: line-through;
}

.price-box__installment {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.price-box__value {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  font-weight: var(--weight-black);
  color: var(--color-navy);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.price-box__or {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: var(--space-2) 0;
}

.price-box__cash {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-success);
  margin-bottom: var(--space-6);
}

/* ------------------------------------------------------------
   10. DIVISOR DE SEÇÃO
   ------------------------------------------------------------ */
.divider {
  width: 60px;
  height: 4px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-full);
  margin: var(--space-4) 0;
}

.divider--center { margin-left: auto; margin-right: auto; }

/* ------------------------------------------------------------
   11. UTILITÁRIOS
   ------------------------------------------------------------ */
.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;
}

.visually-hidden { visibility: hidden; }