/* ============================================================
   CRIPTO NO DIA A DIA — Design System Dark
   Inspirado em: abrahub.com/desafiobtc
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ── Variables ───────────────────────────────────────────── */
:root {
  --bg-base:      #0a0a0a;
  --bg-surface:   #111111;
  --bg-card:      #161616;
  --bg-card-hover:#1e1e1e;
  --border:       #272727;
  --border-hover: #3a3a3a;
  --accent:       #f7931a;
  --accent-dark:  #d97d10;
  --accent-glow:  rgba(247,147,26,.18);
  --text:         #f0f0f0;
  --text-muted:   #888888;
  --text-faint:   #555555;
  --danger:       #e53e3e;
  --success:      #38a169;
  --radius:       10px;
  --radius-lg:    16px;
  --transition:   .2s ease;
}

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

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

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text);
  line-height: 1.65;
  margin: 0;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-dark); }

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
}

p { color: #c0c0c0; }

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── Navbar ──────────────────────────────────────────────── */
.navbar {
  background: rgba(10,10,10,.92) !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding-top: .75rem;
  padding-bottom: .75rem;
}

.navbar-brand {
  font-weight: 900;
  font-size: 1.2rem;
  color: var(--accent) !important;
  letter-spacing: -.5px;
}

.navbar-brand span { color: var(--text); }

.navbar .nav-link {
  color: #aaa !important;
  font-weight: 500;
  font-size: .93rem;
  padding: .4rem .75rem !important;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}

.navbar .nav-link:hover,
.navbar .nav-link.active {
  color: var(--text) !important;
  background: rgba(255,255,255,.06);
}

.navbar .dropdown-menu {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: .4rem;
  box-shadow: 0 8px 32px rgba(0,0,0,.6);
}

.navbar .dropdown-item {
  color: #aaa;
  border-radius: 6px;
  padding: .45rem .75rem;
  font-size: .9rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.navbar .dropdown-item:hover {
  background: rgba(247,147,26,.12);
  color: var(--accent);
}

/* ── Hero — Static ───────────────────────────────────────── */
.hero-static {
  background: var(--bg-base);
  display: flex;
  align-items: center;
  text-align: center;
  padding: 7rem 0 4rem;
}

.hero-static .hero-content {
  max-width: 860px;
  margin: 0 auto;
}

/* ── Video section ───────────────────────────────────────── */
.video-wrapper {
  max-width: 360px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 24px 80px rgba(0,0,0,.6);
}

.presentation-video {
  width: 100%;
  height: 520px;
  display: block;
  background: #000;
  object-fit: cover;
  object-position: top;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--accent-glow);
  border: 1px solid rgba(247,147,26,.35);
  color: var(--accent);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .35rem 1rem;
  border-radius: 100px;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -.03em;
  color: #fff;
  margin-bottom: 1.25rem;
}

.hero-title .accent { color: var(--accent); }

.hero-lead {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: #bbb;
  max-width: 620px;
  margin: 0 auto 2.25rem;
  font-weight: 400;
}

/* ── Page Header (subpages) ──────────────────────────────── */
.page-header {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 5.5rem 0 2.5rem;
  text-align: center;
}

.page-header h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom: .5rem; }
.page-header .page-header-lead { color: var(--text-muted); font-size: 1.05rem; }
.page-header i { color: var(--accent); margin-right: .4rem; }

/* ── Buttons ─────────────────────────────────────────────── */
.btn-crypto {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--accent);
  color: #000 !important;
  font-weight: 800;
  font-size: 1rem;
  padding: .8rem 2rem;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  letter-spacing: .01em;
}

.btn-crypto:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(247,147,26,.35);
  color: #000 !important;
}

.btn-crypto-outline {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: transparent;
  color: var(--accent) !important;
  font-weight: 700;
  font-size: .9rem;
  padding: .6rem 1.4rem;
  border: 1.5px solid var(--accent);
  border-radius: 100px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-decoration: none;
}

.btn-crypto-outline:hover {
  background: var(--accent-glow);
  transform: translateY(-1px);
  color: var(--accent) !important;
}

.btn-telegram {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  background: #229ED9;
  color: #fff !important;
  font-weight: 700;
  padding: .75rem 1.75rem;
  border-radius: 100px;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-decoration: none;
}

.btn-telegram:hover {
  background: #1a8abf;
  transform: translateY(-2px);
  color: #fff !important;
}

/* ── Sections ────────────────────────────────────────────── */
.section-dark { background: var(--bg-base); }
.section-surface { background: var(--bg-surface); }

.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 900;
  margin-bottom: .5rem;
  text-align: center;
}

.section-subtitle {
  color: var(--text-muted);
  text-align: center;
  font-size: 1.05rem;
  margin-bottom: 3rem;
}

.section-label {
  display: inline-block;
  color: var(--accent);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: .6rem;
  text-align: center;
  width: 100%;
}

/* ── Cards ───────────────────────────────────────────────── */
.crypto-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  height: 100%;
  transition: border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  display: block;
  color: inherit;
}

.crypto-card:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(247,147,26,.12);
  color: inherit;
}

.crypto-card .card-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}

.crypto-card h5 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: .5rem;
  color: var(--text);
}

.crypto-card p {
  color: var(--text-muted);
  font-size: .92rem;
  margin-bottom: 1.25rem;
}

/* Blog cards */
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.blog-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(247,147,26,.1);
}

.blog-card .blog-date {
  color: var(--accent);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: .75rem;
}

.blog-card h5 { font-size: 1.05rem; font-weight: 700; margin-bottom: .75rem; }
.blog-card p { color: var(--text-muted); font-size: .9rem; flex: 1; margin-bottom: 1.25rem; }

/* Course cards */
.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  height: 100%;
  transition: border-color var(--transition), transform var(--transition);
}

.course-card:hover { border-color: var(--accent); transform: translateY(-3px); }

.course-badge {
  display: inline-block;
  background: var(--accent-glow);
  color: var(--accent);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .25rem .75rem;
  border-radius: 100px;
  border: 1px solid rgba(247,147,26,.25);
  margin-bottom: 1rem;
}

.course-card h5 { font-size: 1.05rem; font-weight: 700; margin-bottom: .75rem; }
.course-card p { color: var(--text-muted); font-size: .9rem; }

.course-meta {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.course-meta span { color: var(--text-muted); font-size: .83rem; }
.course-meta strong { color: var(--text); }

/* ── Why section (3-col stats) ───────────────────────────── */
.why-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; }

.why-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: border-color var(--transition);
}

.why-item:hover { border-color: var(--accent); }

.why-item .why-emoji { font-size: 2.5rem; display: block; margin-bottom: .75rem; }
.why-item h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: .4rem; }
.why-item p { color: var(--text-muted); font-size: .9rem; margin: 0; }

/* ── Alert / Info boxes ──────────────────────────────────── */
.alert-crypto {
  background: rgba(247,147,26,.08);
  border: 1px solid rgba(247,147,26,.25);
  border-left: 4px solid var(--accent);
  color: #e0d0bb;
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem;
}

.alert-crypto strong { color: var(--accent); }

.alert-info-dark {
  background: rgba(56,161,105,.08);
  border: 1px solid rgba(56,161,105,.25);
  border-left: 4px solid var(--success);
  color: #c6e8d5;
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem;
}

.alert-danger-dark {
  background: rgba(229,62,62,.08);
  border: 1px solid rgba(229,62,62,.25);
  border-left: 4px solid var(--danger);
  color: #f0c0c0;
  border-radius: var(--radius);
  padding: 1.1rem 1.4rem;
}

/* ── Tables ──────────────────────────────────────────────── */
.table-dark-custom {
  color: var(--text);
  border-color: var(--border);
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
}

.table-dark-custom th {
  background: var(--bg-surface);
  color: var(--accent);
  border-color: var(--border);
  font-size: .85rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  font-weight: 700;
}

.table-dark-custom td { border-color: var(--border); color: #c0c0c0; }
.table-dark-custom tbody tr:hover td { background: rgba(255,255,255,.03); }

/* ── Forms ───────────────────────────────────────────────── */
.form-dark {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.form-dark .form-label { color: #bbb; font-size: .9rem; font-weight: 600; margin-bottom: .4rem; }

.form-dark .form-control,
.form-dark .form-select {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: .65rem 1rem;
}

.form-dark .form-control:focus,
.form-dark .form-select:focus {
  background: var(--bg-surface);
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-dark .form-select option { background: var(--bg-surface); color: var(--text); }

/* ── Steps / Process ─────────────────────────────────────── */
.step-item {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  background: var(--accent);
  color: #000;
  font-weight: 900;
  font-size: .9rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: .15rem;
}

.step-body h5 { font-size: 1rem; font-weight: 700; margin-bottom: .3rem; }
.step-body p { color: var(--text-muted); font-size: .9rem; margin: 0; }

/* ── Footer ──────────────────────────────────────────────── */
.footer-dark {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
}

.footer-dark p { color: var(--text-faint); font-size: .88rem; margin: 0; }
.footer-dark a { color: var(--accent); font-weight: 600; }

/* ── Utility overrides ───────────────────────────────────── */
.text-accent { color: var(--accent) !important; }
.text-muted-dark { color: var(--text-muted) !important; }
.bg-surface { background: var(--bg-surface) !important; }
.border-dark-custom { border-color: var(--border) !important; }

/* Bootstrap overrides */
.bg-primary { background: var(--accent) !important; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #000; font-weight: 700; border-radius: 100px; }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #000; }
.btn-outline-primary { border-color: var(--accent); color: var(--accent); border-radius: 100px; font-weight: 600; }
.btn-outline-primary:hover { background: var(--accent); border-color: var(--accent); color: #000; }
.text-primary { color: var(--accent) !important; }
.card { background: var(--bg-card); border-color: var(--border); color: var(--text); border-radius: var(--radius-lg); }
.card-body h5 { color: var(--text); }
.card-body .text-muted { color: var(--text-muted) !important; }
.card-body .card-text { color: #c0c0c0; }
.bg-light { background: var(--bg-surface) !important; }
.bg-dark { background: var(--bg-base) !important; }
.text-white { color: var(--text) !important; }
.alert-warning { background: rgba(247,147,26,.08); border-color: rgba(247,147,26,.3); color: #e0d0bb; border-left: 4px solid var(--accent); border-radius: var(--radius); }
.alert-info { background: rgba(56,161,105,.08); border-color: rgba(56,161,105,.3); color: #c6e8d5; border-left: 4px solid var(--success); border-radius: var(--radius); }
.alert-success { background: rgba(56,161,105,.1); border-color: rgba(56,161,105,.3); color: #c6e8d5; border-left: 4px solid var(--success); border-radius: var(--radius); }
.table { color: var(--text); }
.table th, .table td { border-color: var(--border); }
.table th { color: var(--accent); font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; }
.form-control, .form-select { background: var(--bg-surface); border-color: var(--border); color: var(--text); }
.form-control:focus, .form-select:focus { background: var(--bg-surface); border-color: var(--accent); color: var(--text); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-select option { background: var(--bg-surface); }
.form-label { color: #bbb; font-weight: 600; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero-static { padding: 6rem 0 3rem; }
  .page-header { padding: 5rem 1rem 2rem; }
  .video-wrapper { border-radius: 0; border-left: none; border-right: none; }
}