:root {
  --purple: #7C3AED;
  --purple-dark: #5C2CAE;
  --purple-light: #f9f7ff;
  --orange: #FF7500;
  --bg-light: #F5F5F7;
  --text-dark: #1E1E3F;
  --text-muted: #5a5a7a;
  --white: #ffffff;
  --shadow: 0 4px 24px rgba(124,58,237,0.08);
  --shadow-lg: 0 8px 40px rgba(124,58,237,0.12);
  --radius: 16px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;color:var(--text-dark);background:var(--bg-light);line-height:1.6;min-height:100vh;display:flex}
a{text-decoration:none;color:inherit}
button{cursor:pointer;border:none;background:none;font-family:inherit}
input{font-family:inherit;font-size:1rem}

.login-container{display:flex;width:100%;min-height:100vh}

/* Left side - form */
.login-left{
  flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;
  padding:40px;background:var(--white);position:relative;
}

/* Right side - decorative */
.login-right{
  flex:1;
  background:linear-gradient(135deg,var(--purple) 0%,var(--purple-dark) 60%,#3b1a7e 100%);
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.login-right::before{
  content:'';position:absolute;width:500px;height:500px;
  background:radial-gradient(circle,rgba(255,117,0,0.2),transparent 70%);
  top:-100px;right:-100px;border-radius:50%;
}
.login-right::after{
  content:'';position:absolute;width:400px;height:400px;
  background:radial-gradient(circle,rgba(124,58,237,0.3),transparent 70%);
  bottom:-80px;left:-80px;border-radius:50%;
}
.right-content{
  position:relative;z-index:1;text-align:center;color:var(--white);padding:40px;max-width:440px;
}
.right-content h2{font-size:2rem;font-weight:800;margin-bottom:16px;line-height:1.2}
.right-content p{font-size:1.05rem;opacity:0.85;line-height:1.6;margin-bottom:32px}
.right-features{text-align:left}
.right-feature{display:flex;align-items:center;gap:12px;padding:10px 0;font-size:0.95rem;opacity:0.9}
.right-feature svg{flex-shrink:0}

/* Back link */
.back-link{
  position:absolute;top:24px;left:24px;
  color:var(--purple);font-size:0.9rem;font-weight:500;
  display:flex;align-items:center;gap:6px;
  transition:var(--transition);
}
.back-link:hover{opacity:0.7}

/* Logo */
.logo-top{margin-bottom:40px}
.logo-top a{display:inline-block}
.logo-top img{height:36px}

/* Form */
.login-form{width:100%;max-width:420px}

/* Tabs */
.tabs{display:flex;gap:4px;margin-bottom:32px;background:var(--bg-light);border-radius:12px;padding:4px}
.tab{
  flex:1;padding:12px 20px;font-size:0.95rem;font-weight:600;
  color:var(--text-muted);border-radius:10px;
  transition:var(--transition);text-align:center;
}
.tab.active{background:var(--white);color:var(--purple);box-shadow:var(--shadow)}
.tab:hover:not(.active){color:var(--text-dark)}
.tab+.tab{border-left:1.5px solid #e0e0ea}

/* Titles */
.form-title{font-size:1.75rem;font-weight:800;text-align:center;margin-bottom:8px;color:var(--text-dark)}
.form-subtitle{font-size:0.95rem;color:var(--text-muted);text-align:center;margin-bottom:28px}

/* Inputs */
.form-group{margin-bottom:20px}
.form-input{
  width:100%;height:56px;
  border:2px solid #e8e8f0;border-radius:12px;
  padding:0 16px;font-size:1rem;
  transition:var(--transition);background:var(--white);
  color:var(--text-dark);
}
.form-input:focus{outline:none;border-color:var(--purple);box-shadow:0 0 0 4px rgba(124,58,237,0.1)}
.form-input::placeholder{color:#b0b0c0}

/* Submit button */
.btn-submit{
  width:100%;height:56px;
  background:linear-gradient(135deg,var(--purple),var(--purple-dark));
  color:var(--white);border:none;border-radius:12px;
  font-size:1rem;font-weight:600;cursor:pointer;
  transition:var(--transition);
  box-shadow:0 4px 16px rgba(124,58,237,0.3);
}
.btn-submit:hover{transform:translateY(-2px);box-shadow:0 6px 24px rgba(124,58,237,0.4)}

/* Links */
.forgot-link{
  display:block;text-align:center;margin-top:24px;
  color:var(--purple);font-size:0.9rem;font-weight:500;
  transition:var(--transition);
}
.forgot-link:hover{opacity:0.7}

.register-text{text-align:center;margin-top:16px;font-size:0.9rem;color:var(--text-muted)}
.register-text a{color:var(--purple);font-weight:600;cursor:pointer;transition:var(--transition)}
.register-text a:hover{opacity:0.7}

/* Checkbox */
.checkbox-row{display:flex;align-items:flex-start;gap:10px;margin-top:20px;font-size:0.8rem;color:var(--text-muted);line-height:1.5}
.checkbox-row input{margin-top:3px;accent-color:var(--purple)}
.checkbox-row a{color:var(--purple)}

/* Form visibility */
.phone-form,.register-form{display:none}
.phone-form.active,.register-form.active{display:block}
.email-form{display:block}
.email-form.hidden{display:none}

/* Divider */
.divider{display:flex;align-items:center;gap:16px;margin:24px 0}
.divider::before,.divider::after{content:'';flex:1;height:1px;background:#e8e8f0}
.divider span{font-size:0.85rem;color:var(--text-muted);white-space:nowrap}

/* Social login (placeholder) */
.social-login{display:flex;gap:12px;justify-content:center}
.social-btn{
  width:56px;height:56px;border-radius:12px;
  border:2px solid #e8e8f0;background:var(--white);
  display:flex;align-items:center;justify-content:center;
  transition:var(--transition);cursor:pointer;
}
.social-btn:hover{border-color:var(--purple);transform:translateY(-2px);box-shadow:var(--shadow)}

/* Responsive */
@media(max-width:900px){
  .login-right{display:none}
  .login-left{padding:24px}
}
@media(max-width:480px){
  .form-title{font-size:1.5rem}
  .login-form{max-width:100%}
  .tabs{flex-direction:row}
  .tab{padding:12px 10px;font-size:0.85rem}
}