body.auth-body {
   background: linear-gradient(135deg, #194fa0 0%, #143d7a 100%);
   /* Slightly darker gradient */
   min-height: 100vh;
   display: flex;
   align-items: center;
   justify-content: center;
   font-family: 'Rubik', sans-serif;
   padding: 20px;
}

.auth-container {
   width: 100%;
   max-width: 850px;
   /* Slightly compact */
   background: transparent;
   border-radius: 20px;
   display: flex;
   box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
   /* Soft shadow for depth */
   overflow: hidden;
   min-height: 550px;
}

/* Left welcome side */
.auth-left {
   flex: 1.1;
   /* Give it slightly more space */
   color: white;
   padding: 50px;
   display: flex;
   flex-direction: column;
   justify-content: center;
   background: rgba(255, 255, 255, 0.05);
   /* Glass effect overlay */
   backdrop-filter: blur(5px);
}

.auth-left h1 {
   font-size: 3rem;
   font-weight: 800;
   margin-bottom: 15px;
   letter-spacing: -1px;
}

.auth-left h3 {
   font-weight: 500;
   margin-bottom: 20px;
   font-size: 1.5rem;
   opacity: 0.9;
}

.auth-left p {
   font-size: 0.9rem;
   line-height: 1.6;
   opacity: 0.8;
}

/* Right form side */
.auth-right {
   flex: 1;
   background: #fff;
   padding: 40px;
   display: flex;
   flex-direction: column;
   justify-content: center;
   position: relative;
   /* Removed margin/border-radius to make it flush split-screen like standard modern auth pages, or keep standard card look? 
       User said "make login and register like these" (ref image). 
       The ref image has a floating white card on a blue bg. 
       Let's stick to the card look but refined. */
}

/* Let's try the strict "Floating Card" look from the previous prompt's intent, 
   but merged into a single container for cleaner 50/50 split if standard, 
   OR if mimicking the image exactly: nice white card on blue bg.
   
   The previous CSS had a split container where right side was a card inside.
   Let's make it a clean split container.
*/
.auth-container {
   background: #fff;
   /* White container */
}

.auth-left {
   background: url('https://source.unsplash.com/random/800x600/?technology,blue') center/cover no-repeat;
   /* Optional texture */
   position: relative;
   z-index: 1;
}

.auth-left::after {
   content: '';
   position: absolute;
   top: 0;
   left: 0;
   right: 0;
   bottom: 0;
   background: linear-gradient(135deg, rgba(25, 79, 160, 0.9), rgba(20, 61, 122, 0.9));
   z-index: -1;
}

.auth-brand-link {
   text-decoration: none;
   color: #333;
   font-weight: 800;
   font-size: 1.4rem;
   display: block;
   /* block to allow margin */
   margin-bottom: 5px;
   text-align: center;
}

.auth-brand-link i {
   color: #194fa0;
}

.auth-brand-link span {
   color: #194fa0;
}

.auth-brand-link:hover {
   opacity: 0.8;
   color: #333;
}


.auth-right h2 {
   font-weight: 700;
   color: #333;
   font-size: 1.8rem;
   /* Smaller font */
   margin-bottom: 5px;
   text-align: center;
}

.auth-right .subtitle {
   text-align: center;
   color: #888;
   margin-bottom: 25px;
   font-size: 0.85rem;
}

.form-floating-custom {
   position: relative;
   margin-bottom: 15px;
   /* Less spacing */
}

.form-floating-custom input {
   width: 100%;
   padding: 12px 18px;
   /* Slightly smaller padding */
   border-radius: 8px;
   /* Rounded but not pills */
   border: 1px solid #e1e4e8;
   background: #f8f9fa;
   font-size: 0.95rem;
   outline: none;
   transition: all 0.2s;
   font-weight: 500;
   color: #495057;
}

.form-floating-custom input:focus {
   border-color: #194fa0;
   background: #fff;
   box-shadow: 0 0 0 3px rgba(25, 79, 160, 0.1);
}

.form-floating-custom input::placeholder {
   color: #adb5bd;
   font-weight: 400;
}

.btn-auth-submit {
   width: 100%;
   padding: 12px;
   border-radius: 8px;
   background: #194fa0;
   color: white;
   font-weight: 600;
   font-size: 1rem;
   border: none;
   cursor: pointer;
   transition: all 0.2s;
   box-shadow: 0 4px 6px rgba(25, 79, 160, 0.2);
}

.btn-auth-submit:hover {
   background: #143d7a;
   transform: translateY(-1px);
   box-shadow: 0 6px 8px rgba(25, 79, 160, 0.25);
}

.auth-links {
   margin-top: 15px;
   display: flex;
   justify-content: space-between;
   align-items: center;
   font-size: 0.85rem;
}

.auth-links a {
   color: #666;
   text-decoration: none;
}

.auth-links a:hover {
   color: #194fa0;
   text-decoration: underline;
}

/* 404 Specific */
.error-page-container {
   text-align: center;
   padding: 40px;
   background: white;
   border-radius: 20px;
   box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
   max-width: 500px;
   width: 90%;
}

.error-code {
   font-size: 6rem;
   font-weight: 900;
   color: #e9ecef;
   /* Subtle background text */
   line-height: 1;
   margin-bottom: -20px;
   position: relative;
   z-index: 0;
}

.error-title {
   font-size: 2rem;
   font-weight: 800;
   color: #333;
   position: relative;
   z-index: 1;
   margin-bottom: 10px;
}

.error-text {
   color: #666;
   margin-bottom: 30px;
}