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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.auth-container {
    background: white;
    border-radius: 16px;
    padding: 40px;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.logo {
    font-size: 4em;
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    color: #333;
    margin-bottom: 10px;
    font-size: 2em;
    text-align: center;
}

.subtitle {
    color: #6b7280;
    margin-bottom: 30px;
    font-size: 0.95em;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.2s;
}

input:focus {
    outline: none;
    border-color: #667eea;
}

.btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.message {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 500;
}

.message.error {
    background: #fee2e2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.message.success {
    background: #d1fae5;
    color: #059669;
    border: 1px solid #a7f3d0;
}

.toggle-link {
    text-align: center;
    margin-top: 20px;
    color: #6b7280;
}

.toggle-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.toggle-link a:hover {
    text-decoration: underline;
}