/* ==========================================================
   IDENTIDADE VISUAL: VETORIAL CONCURSOS
   Paleta: Roxo #683FE8 | Fundo #030410 | Branco #FFFFFF
   Tipografia: Plus Jakarta Sans & Inter
   ========================================================== */

:root {
  --color-purple: #683FE8;
  --color-purple-hover: #7D55F6;
  --color-purple-light: #8561FF;
  --color-purple-glow: rgba(104, 63, 232, 0.25);
  --color-bg: #030410;
  --color-surface: #0A0B1A;
  --color-card: #0E1026;
  --color-border: #1C1F3D;
  --color-border-hover: rgba(104, 63, 232, 0.5);
  --color-text: #FFFFFF;
  --color-text-muted: #9CA3AF;
  --color-text-darker: #6B7280;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .font-heading {
  font-family: 'Plus Jakarta Sans', -apple-system, sans-serif;
  font-weight: 800;
  line-height: 1.15;
}

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

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

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

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-purple);
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(3, 4, 16, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
  height: 76px;
  display: flex;
  align-items: center;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  transition: transform var(--transition-fast);
}
.brand-logo:hover {
  transform: scale(1.02);
}
.brand-logo img {
  height: 42px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
  padding: 6px 0;
}
.nav-link:hover {
  color: var(--color-text);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-purple);
  transition: width var(--transition-fast);
}
.nav-link:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius-md);
  padding: 12px 22px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background: var(--color-purple);
  color: #FFFFFF;
  box-shadow: 0 4px 18px var(--color-purple-glow);
}
.btn-primary:hover {
  background: var(--color-purple-hover);
  box-shadow: 0 6px 24px rgba(104, 63, 232, 0.45);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  background: var(--color-card);
  border-color: var(--color-border);
  color: var(--color-text-muted);
}
.btn-outline:hover {
  border-color: var(--color-purple-light);
  color: #FFFFFF;
  background: #141738;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-full {
  width: 100%;
}

/* Hero Section */
.hero-section {
  position: relative;
  padding: 60px 0 40px;
  text-align: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 380px;
  background: radial-gradient(circle, rgba(104, 63, 232, 0.22) 0%, rgba(3, 4, 16, 0) 70%);
  filter: blur(50px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 820px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  color: var(--color-purple-light);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 900;
  letter-spacing: -1px;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: #FFFFFF;
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--color-text-muted);
  font-weight: 400;
  max-width: 640px;
  margin: 0 auto 30px;
  line-height: 1.6;
}

/* Search & Filter Bar */
.search-container {
  max-width: 540px;
  margin: 0 auto 20px;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 14px 18px 14px 44px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: #FFFFFF;
  font-size: 14px;
  outline: none;
  transition: all var(--transition-fast);
}
.search-input:focus {
  border-color: var(--color-purple);
  box-shadow: 0 0 0 3px rgba(104, 63, 232, 0.2);
}
.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--color-text-darker);
  pointer-events: none;
}

.category-pills {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}

.cat-pill {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 8px 16px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.cat-pill:hover, .cat-pill.active {
  background: var(--color-purple);
  border-color: var(--color-purple);
  color: #FFFFFF;
  box-shadow: 0 4px 16px var(--color-purple-glow);
}

.pill-counter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.12);
  font-size: 11px;
  font-weight: 800;
  padding: 1px 7px;
  border-radius: 999px;
}
.cat-pill.active .pill-counter {
  background: rgba(255, 255, 255, 0.25);
  color: #FFFFFF;
}

/* Course Catalog Section */
.catalog-section {
  padding: 30px 0 80px;
}

.catalog-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.catalog-title {
  font-size: 26px;
  color: #FFFFFF;
}
.catalog-subtitle {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

.catalog-count {
  font-size: 12px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  color: var(--color-purple-light);
}

/* Course Cards Grid */
.courses-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 640px) {
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .courses-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1400px) {
  .courses-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Course Card Component */
.course-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.course-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-border-hover);
  box-shadow: 0 16px 36px -10px rgba(104, 63, 232, 0.28);
}

/* 16:9 Cover Container */
.card-cover {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-bg);
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}

.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.course-card:hover .card-cover img {
  transform: scale(1.04);
}

.card-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 2;
  background: rgba(3, 4, 16, 0.92);
  border: 1px solid rgba(104, 63, 232, 0.6);
  color: #FFFFFF;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 4px 10px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-purple);
  border-radius: 50%;
}

.card-category {
  position: absolute;
  bottom: 10px;
  left: 10px;
  z-index: 2;
  background: rgba(14, 16, 38, 0.85);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 10px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  backdrop-filter: blur(4px);
}

/* Card Body */
.card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
  justify-content: space-between;
  gap: 16px;
}

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

.card-title {
  font-size: 20px;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.3px;
  transition: color var(--transition-fast);
}

.course-card:hover .card-title {
  color: var(--color-purple-light);
}

.card-role {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-purple-light);
}

.card-desc {
  font-size: 12px;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* WhatsApp Action Button in Card */
.btn-whatsapp-card {
  width: 100%;
  background: var(--color-purple);
  color: #FFFFFF;
  padding: 13px 18px;
  border-radius: var(--radius-md);
  font-weight: 800;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 14px var(--color-purple-glow);
  transition: all var(--transition-normal);
}

.btn-whatsapp-card:hover {
  background: var(--color-purple-hover);
  box-shadow: 0 6px 20px rgba(104, 63, 232, 0.45);
  transform: translateY(-2px);
}

.btn-whatsapp-card svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
  flex-shrink: 0;
}

/* Differentials Section */
.features-section {
  padding: 60px 0;
  border-top: 1px solid var(--color-border);
  background: #02030B;
}

.section-head {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 40px;
}

.section-tag {
  color: var(--color-purple-light);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.section-title {
  font-size: 28px;
  margin: 8px 0 10px;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 26px;
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--color-card);
  border: 1px solid rgba(104, 63, 232, 0.3);
  color: var(--color-purple-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.feature-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.feature-text {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 50px 0 30px;
  margin-top: auto;
}

.footer-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 12px;
  color: var(--color-text-darker);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

.admin-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text-darker);
  font-size: 12px;
  transition: color var(--transition-fast);
}
.admin-link:hover {
  color: var(--color-purple-light);
}

/* Mobile Navigation Drawer */
.mobile-menu-btn {
  display: none;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 8px;
  color: #FFFFFF;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-links, .desktop-only {
    display: none !important;
  }
  .mobile-menu-btn {
    display: flex;
  }
}

.mobile-drawer {
  display: none;
  background: rgba(10, 11, 26, 0.98);
  border-bottom: 1px solid var(--color-border);
  padding: 20px;
}

.mobile-drawer.open {
  display: block;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  list-style: none;
  margin-bottom: 20px;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}
.empty-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  color: var(--color-purple-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}