:root {
  --bg-main: #f8fafc;
  --bg-soft: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.65);
  --primary: #0066ff;
  --primary-soft: #ede9fe;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-soft: #e5e7eb;
  --hover-bg: #8e4cff;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --shadow-soft: 0 20px 60px rgba(15, 23, 42, 0.08);
  --shadow-glass: 0 10px 30px rgba(15, 23, 42, 0.06);
  --container: 1200px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", system-ui, sans-serif;
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

.landing-bg {
  position: fixed;
  inset: 0;
  background: linear-gradient(120deg,#f5f3ff,#e8fbfd,#edfdf1);
  background-size: 200% 200%;
  animation: bgMove 5s ease infinite;
  z-index: -1;
  pointer-events: none;
}

@keyframes bgMove {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.auth-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.auth-container {
  width: 100%;
  max-width: 420px;
}

.auth-card {
  background: #fff;
  padding: 3rem;
  border-radius: 24px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.12);
  text-align: center;
  display: flex;
  flex-direction: column;
}

.auth-card img {
  display: block;
  object-fit: cover;
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
}

.auth-card h2 {
  font-size: 1.7rem;
  margin-bottom: 0.5rem;
}

.auth-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.form-group {
  text-align: left;
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.35rem;
  font-weight: 600;
}

.form-group input {
  width: 100%;
  padding: 0.8rem 0.9rem;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  font-size: 0.9rem;
  outline: none;
}

.form-group input:focus {
  border-color: #6366f1;
  box-shadow: 0 0 0 3px rgba(99,102,241,0.2);
}

.form-group {
  position: relative;
  margin-bottom: 1.8rem;
}

.form-group input {
  width: 100%;
  padding: 18px 14px;
  font-size: 0.95rem;
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  background: #fff;
  color: var(--text-main);
  outline: none;
  transition: border 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.form-group label {
  position: absolute;
  top: 50%;
  left: 14px;
  transform: translateY(-50%);
  font-size: 0.9rem;
  color: var(--text-muted);
  pointer-events: none;
  background: #fff;
  padding: 0 6px;
  transition: all 0.25s var(--ease);
}

.form-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(0,102,255,0.15);
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label {
  top: -8px;
  font-size: 0.72rem;
  color: var(--primary);
}

.submit-btn {
  font-family: inherit;
  font-weight: 600;
  color: #fff;
  background: #6366f1;
  border: none;
  border-radius: var(--radius-md);
  position: relative;
  padding: 18px 24px;
  width: 100%;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 1rem;
}

.submit-btn:hover {
  background: var(--hover-bg);
}

.auth-footer {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.auth-footer a {
  color: #6366f1;
  font-weight: 600;
  text-decoration: none;
}

#signupForm.loading button {
  opacity: 0.7;
  pointer-events: none;
}