:root {
  --bg: #0f0f12;
  --card: #1a1a20;
  --border: #2a2a32;
  --text: #e8e8ed;
  --muted: #8888a0;
  --accent: #00d4aa;
  --accent-hover: #00f0c0;
  --danger: #ff4757;
  --radius: 12px;
  --font: 'DM Sans', system-ui, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

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

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* Header */
.header {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(15,15,18,0.95);
  backdrop-filter: blur(8px);
  z-index: 100;
}
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--accent);
  display: flex;
  align-items: center;
}
.logo img {
  height: 28px;
  width: auto;
  max-width: 110px;
  display: block;
  object-fit: contain;
  margin-right: 0.5rem;
}
.nav a {
  margin-left: 1.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}
.nav a:hover { color: var(--text); }

/* Landing / Login */
.hero {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 0;
  background: radial-gradient(ellipse 80% 50% at 50% 0%, rgba(0,212,170,0.08) 0%, transparent 50%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; }
}
.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  line-height: 1.2;
}
.hero p {
  color: var(--muted);
  margin-bottom: 1.5rem;
  max-width: 400px;
}
.hero-features {
  list-style: none;
}
.hero-features li {
  padding: 0.4rem 0;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.hero-features li::before {
  content: "✓";
  color: var(--accent);
  font-weight: bold;
}

.auth-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}
.auth-box h2 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--text);
}
.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.tabs a {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}
.tabs a.active {
  background: var(--border);
  color: var(--accent);
}
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.35rem;
}
.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 1rem;
}
.form-group input:focus {
  outline: none;
  border-color: var(--accent);
}
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  width: 100%;
  text-align: center;
  font-family: var(--font);
}
.btn:hover {
  background: var(--accent-hover);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-outline:hover {
  background: rgba(0,212,170,0.1);
}
.msg {
  padding: 0.75rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
.msg.erro { background: rgba(255,71,87,0.15); color: #ff6b7a; }
.msg.ok { background: rgba(0,212,170,0.15); color: var(--accent); }

/* Dashboard */
.page {
  padding: 2rem 0 4rem;
}
.page h1 {
  font-size: 1.75rem;
  margin-bottom: 1.5rem;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color 0.2s;
}
.card:hover { border-color: var(--accent); }
.card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.card .meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.75rem;
}
.card p { font-size: 0.9rem; color: var(--muted); margin-bottom: 1rem; }
.card .btn { width: auto; padding: 0.5rem 1rem; font-size: 0.9rem; }

.badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-trial { background: rgba(0,212,170,0.2); color: var(--accent); }
.badge-ativo { background: rgba(0,212,170,0.2); color: var(--accent); }
.badge-expirado { background: rgba(255,71,87,0.2); color: var(--danger); }

.alert-plan {
  background: linear-gradient(135deg, rgba(0,212,170,0.1), rgba(0,212,170,0.05));
  border: 1px solid rgba(0,212,170,0.3);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.alert-plan p { margin: 0; color: var(--text); }

/* Treino detail */
.treino-detail { max-width: 640px; }
.treino-detail h2 { margin-bottom: 0.5rem; }
.treino-detail .meta { color: var(--muted); margin-bottom: 1rem; }
.exercicios-list { list-style: none; }
.exercicios-list li {
  padding: 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.exercicios-list .nome { font-weight: 600; }
.exercicios-list .series { color: var(--accent); font-size: 0.9rem; }

/* Planos */
.plans {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.plan-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative;
}
.plan-card.destaque {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}
.plan-card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.plan-card .preco {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  margin: 1rem 0;
}
.plan-card .preco small { font-size: 0.9rem; color: var(--muted); font-weight: 400; }
.plan-card ul {
  list-style: none;
  margin: 1.5rem 0;
}
.plan-card ul li {
  padding: 0.4rem 0;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.plan-card ul li::before { content: "✓"; color: var(--accent); }

/* Contato instrutor */
.form-textarea {
  width: 100%;
  min-height: 140px;
  padding: 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  resize: vertical;
}
.form-textarea:focus {
  outline: none;
  border-color: var(--accent);
}

/* Admin */
.admin-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  margin-bottom: 2rem;
}
.table-wrap {
  overflow-x: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,0.02); }

/* Footer */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}