* {
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial;
  background: radial-gradient(
      1200px 600px at 10% 10%,
      rgba(124, 77, 255, 0.08),
      transparent 8%
    ),
    radial-gradient(
      1000px 500px at 90% 90%,
      rgba(58, 208, 255, 0.04),
      transparent 10%
    ),
    var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root {
  --bg: #0f1724;
  --panel: linear-gradient(180deg, #191a2a 0%, #161827 100%);
  --muted: #9aa4c4;
  --text: #e6eef8;
  --accent-start: #7c4dff;
  --accent-end: #3ad0ff;
  --accent-gradient: linear-gradient(
    90deg,
    var(--accent-start),
    var(--accent-end)
  );
  --glass: rgba(255, 255, 255, 0.03);
  --shadow: 0 6px 20px rgba(4, 8, 20, 0.6);
  --radius: 14px;
  --glass-2: rgba(255, 255, 255, 0.02);
}

body[data-theme="light"] {
  --bg: #f6f8fb;
  --panel: linear-gradient(180deg, #ffffff 0%, #fbfbff 100%);
  --muted: #6b7280;
  --text: #0f1724;
  --glass: rgba(16, 24, 40, 0.02);
  --glass-2: rgba(16, 24, 40, 0.03);
  --shadow: 0 10px 30px rgba(16, 24, 40, 0.06);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  padding: 40px 32px;
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

.auth-card .brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
  font-size: 24px;
  text-decoration: none;
  margin-bottom: 8px;
}

.auth-card .brand .material-icons {
  font-size: 32px;
}

.auth-card .title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.auth-card .subtitle {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 32px;
}

.input-group {
  text-align: left;
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}

.input-group input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--glass-2);
  background: var(--glass);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.18s;
}

.input-group input:focus {
  border-color: var(--accent-start);
}

.input-wrapper {
  position: relative;
}

.input-wrapper .icon-btn {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  border-radius: 10px;
}

.input-wrapper .icon-btn:hover {
  background: var(--glass-2);
  color: var(--text);
}

.input-wrapper input {
  padding-right: 44px;
}

.auth-btn {
  width: 100%;
  border: none;
  padding: 14px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: linear-gradient(90deg, var(--accent-start), var(--accent-end));
  color: white;
  font-size: 16px;
  font-weight: 600;
  box-shadow: 0 10px 30px rgba(68, 36, 255, 0.16);
  margin-top: 12px;
  margin-bottom: 24px;
}

.auth-card .sub-action {
  color: var(--muted);
  font-size: 14px;
}

.auth-card .sub-action a {
  color: var(--accent-start);
  font-weight: 600;
  text-decoration: none;
}

@media (max-width: 480px) {
  body {
    padding: 0 16px;
  }
  .auth-card {
    padding: 32px 24px;
    margin: 0;
  }
  .auth-card .brand {
    font-size: 20px;
  }
  .auth-card .brand .material-icons {
    font-size: 28px;
  }
  .auth-card .title {
    font-size: 16px;
  }
  .auth-card .subtitle {
    font-size: 13px;
    margin-bottom: 24px;
  }
  .auth-btn {
    padding: 12px;
    font-size: 15px;
  }
}