:root {
  --bg-1: #f8faff;
  --bg-2: #eef2ff;
  --bg-3: #f3f4ff;
  --card: rgba(255, 255, 255, 0.74);
  --card-border: rgba(255, 255, 255, 0.6);
  --text: #0f172a;
  --muted: #64748b;
  --primary: #5b5ef8;
  --primary-2: #7a5cff;
  --focus: rgba(91, 94, 248, 0.2);
  --success: #16a34a;
  --error: #ef4444;
  --ring: rgba(91, 94, 248, 0.12);
  --radius: 14px;
  --shadow: 0 20px 50px rgba(52, 64, 130, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  color: #1f2937;
  background-color: #f3f4f6;
}

.signin-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
}

.signin-card {
  width: 100%;
  max-width: 520px;
  text-align: center;
}

.signin-card h1 {
  margin: 0;
  font-size: clamp(2rem, 4.8vw, 2.9rem);
  line-height: 1.1;
  color: #111827;
}

.signin-subtitle {
  margin: 14px 0 36px;
  font-size: 1rem;
  color: #6b7280;
  font-weight: 500;
}

#signinForm {
  text-align: left;
}

#signinForm label {
  display: block;
  margin-bottom: 12px;
  font-size: 1rem;
  font-weight: 600;
  color: #6b7280;
}

#signinForm input {
  width: 100%;
  height: 62px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  background: #ffffff;
  padding: 0 16px;
  font-size: 1.12rem;
  color: #111827;
  outline: none;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

#signinForm input:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.14);
}

.signin-btn {
  width: 100%;
  margin-top: 26px;
  height: 62px;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #ffffff;
  font-size: 2rem;
  font-weight: 700;
  cursor: pointer;
  transition: filter 0.2s ease;
}

.signin-btn:hover {
  filter: brightness(0.96);
}

.signin-footer {
  margin: 34px 0 0;
  font-size: 2rem;
  font-weight: 700;
  color: #111827;
}

.signin-footer a {
  color: #1d4ed8;
  text-decoration: none;
}

@media (max-width: 640px) {
  .signin-card h1 {
    font-size: 2.15rem;
  }

  .signin-subtitle {
    margin-bottom: 28px;
    font-size: 0.95rem;
  }

  #signinForm label {
    font-size: 0.95rem;
  }

  #signinForm input,
  .signin-btn {
    height: 56px;
    font-size: 1.1rem;
  }

  .signin-btn {
    margin-top: 22px;
    font-size: 1.85rem;
  }

  .signin-footer {
    margin-top: 28px;
    font-size: 1.75rem;
  }
}