@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;600&display=swap');

:root {
  --primary: #2563EB;
  --secondary: #38bdf8;
  --accent: #fbbf24;
  --background: linear-gradient(135deg, #e0e7ff 0%, #f8fafc 100%);
  --card-bg: #ffffffee;
  --border: #38bdf8;
  --shadow: 0 8px 32px -8px #2563eb33, 0 1.5px 12px #38bdf822;
  --gradient-strong: linear-gradient(120deg, #2563eb 0%, #38bdf8 100%);
  --gradient-soft: linear-gradient(120deg, #f0f9ff 60%, #e0f2fe 100%);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Outfit', sans-serif;
}

body {
  background: var(--background);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', 'Inter', system-ui, sans-serif;
  transition: background 0.4s;
}

.container {
  background: var(--gradient-soft);
  padding: 44px 36px 36px 36px;
  border-radius: 1.7rem;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 410px;
  text-align: center;
  color: #1e293b;
  border: 2.5px solid var(--border);
  position: relative;
  animation: fadeIn 1s cubic-bezier(.23,1.02,.32,1);
  margin: 32px 0;
}

h2 {
  margin-bottom: 22px;
  color: var(--primary);
  font-weight: 900;
  font-size: 2.2rem;
  letter-spacing: 1.2px;
  text-shadow: 0 2px 12px #2563eb22;
}

input {
  width: 100%;
  padding: 13px 14px;
  margin: 12px 0 8px 0;
  border: 1.5px solid var(--border);
  border-radius: 1.2rem;
  background: #f8fafc;
  font-size: 1.1rem;
  transition: border 0.2s, box-shadow 0.2s;
}

input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px #2563eb33;
}

button {
  width: 100%;
  padding: 13px 0;
  margin-top: 12px;
  background: var(--gradient-strong);
  color: #fff;
  border: none;
  border-radius: 1.2rem;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 2px 8px #2563eb22;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
}

button:hover {
  background: #2563eb;
  color: #fff;
  box-shadow: 0 6px 24px -4px #2563eb44;
}

.alt-link {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  margin-left: 4px;
  transition: color 0.2s;
}

.alt-link:hover {
  color: var(--secondary);
}

/* Link de alternância entre login/cadastro como botão estilizado */
.alt-link {
  display: inline-block;
  margin-top: 22px;
  color: #fff;
  background: var(--primary);
  border-radius: 8px;
  padding: 8px 22px;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.5px;
  text-decoration: none;
  box-shadow: 0 2px 8px #2563eb22;
  transition: background 0.3s, color 0.3s, box-shadow 0.3s, transform 0.2s;
  text-shadow: 0 1px 6px #38bdf822;
  border: none;
}
.alt-link:hover {
  background: var(--accent);
  color: #2563eb;
  box-shadow: 0 8px 24px -8px #fbbf2444;
  transform: scale(1.05);
}

/* Intercalação visual entre login/cadastro */
.container::before {
  content: '';
  position: absolute;
  top: -18px; left: 50%;
  transform: translateX(-50%);
  width: 70px; height: 7px;
  border-radius: 8px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  opacity: 0.85;
}

.container {
  border-image: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent)) 1;
}

@keyframes fadeIn {
  from {opacity: 0; transform: translateY(-20px);}
  to {opacity: 1; transform: translateY(0);}
}

/* Responsivo */
@media (max-width: 500px) {
  .container {
    padding: 24px 8px 18px 8px;
    max-width: 98vw;
  }
  h2 {
    font-size: 1.4rem;
  }
  .alt-link {
    padding: 8px 10px;
    font-size: 0.98rem;
  }
}

/* Suave animação de foco para inputs */
input, button, .alt-link {
  outline: none;
}
input:focus, button:focus, .alt-link:focus {
  box-shadow: 0 0 0 3px #38bdf855;
}

/* Suporte a dark mode */
[data-theme="dark"] body {
  background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  color: #f8fafc;
}
[data-theme="dark"] .container {
  background: linear-gradient(120deg, #1e293b 60%, #0f172a 100%);
  color: #f8fafc;
  border-color: #60a5fa;
}
[data-theme="dark"] h2 {
  color: #60a5fa;
  text-shadow: 0 2px 12px #60a5fa33;
}
[data-theme="dark"] input {
  background: #1e293b;
  color: #60a5fa;
  border-color: #334155;
}
[data-theme="dark"] input:focus {
  background: #22305a;
  border-color: #60a5fa;
}
[data-theme="dark"] button {
  background: linear-gradient(90deg, #60a5fa 60%, #2563eb 100%);
  color: #fff;
}
[data-theme="dark"] .alt-link {
  background: #60a5fa;
  color: #1e293b;
}
[data-theme="dark"] .alt-link:hover {
  background: #fbbf24;
  color: #2563eb;
}