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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.container {
    position: relative;
    width: 100%;
    max-width: 450px;
    margin: 20px;
    z-index: 10;
}

.form-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.form-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    background-size: 400% 400%;
    animation: gradientShift 3s ease infinite;
}

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

.form-section {
    display: none;
    animation: fadeInUp 0.6s ease;
}

.form-section.active {
    display: block;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.input-group {
    position: relative;
    margin-bottom: 20px;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #667eea;
    font-size: 16px;
    z-index: 2;
}

.input-group input {
    width: 100%;
    padding: 15px 15px 15px 50px;
    border: 2px solid #e1e8ed;
    border-radius: 12px;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.8);
    transition: all 0.3s ease;
    outline: none;
}

.input-group input:focus {
    border-color: #667eea;
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.2);
    transform: translateY(-2px);
}

.toggle-password {
    position: absolute !important;
    right: 15px !important;
    left: auto !important;
    cursor: pointer;
    color: #999 !important;
    transition: color 0.3s ease;
}

.toggle-password:hover {
    color: #667eea !important;
}

.options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 10px;
}

.remember-me {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
    color: #666;
    user-select: none;
}

.remember-me input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid #ddd;
    border-radius: 4px;
    margin-right: 8px;
    position: relative;
    transition: all 0.3s ease;
}

.remember-me input[type="checkbox"]:checked + .checkmark {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-color: #667eea;
}

.remember-me input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.forgot-password, .terms-link {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.forgot-password:hover, .terms-link:hover {
    color: #764ba2;
    text-decoration: underline;
}

.btn-primary {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

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

.switch-form {
    text-align: center;
    margin-top: 25px;
    padding-top: 25px;
    border-top: 1px solid #e1e8ed;
}

.switch-form p {
    color: #666;
    font-size: 14px;
}

.switch-form a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.switch-form a:hover {
    color: #764ba2;
    text-decoration: underline;
}

/* Input help text */
.input-help {
    margin-top: 5px;
    padding-left: 40px;
}

.input-help small {
    color: #6c757d;
    font-size: 12px;
    line-height: 1.4;
}

/* Enhanced input group for usercode */
.input-group:has(#userCode) {
    position: relative;
}

.input-group:has(#userCode) i.fas {
    color: #28a745;
}

/* Success state for valid usercode */
.input-group.valid #userCode {
    border-color: #28a745;
    background-color: rgba(40, 167, 69, 0.1);
}

.input-group.valid i.fas {
    color: #28a745;
}

/* Error state for invalid usercode */
.input-group.error #userCode {
    border-color: #dc3545;
    background-color: rgba(220, 53, 69, 0.1);
}

.input-group.error i.fas {
    color: #dc3545;
}

/* Validation message */
.validation-message {
    position: absolute;
    bottom: -20px;
    left: 40px;
    font-size: 11px;
    line-height: 1.2;
}

.validation-message.success {
    color: #28a745;
}

.validation-message.error {
    color: #dc3545;
}

/* Background shapes animation */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #4ecdc4, #44a08d);
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.shape-3 {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #45b7d1, #2980b9);
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

.shape-4 {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #96ceb4, #6c5ce7);
    top: 10%;
    right: 30%;
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

/* Mobile responsive */
@media (max-width: 480px) {
    .container {
        margin: 10px;
        max-width: 100%;
    }
    
    .form-container {
        padding: 30px 25px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    .options {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .input-group input {
        padding: 12px 12px 12px 45px;
        font-size: 14px;
    }
    
    .btn-primary {
        padding: 12px;
        font-size: 14px;
    }
}

/* Success message styles */
.success-message {
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 500;
    animation: slideDown 0.3s ease;
}

.error-message {
    background: linear-gradient(135deg, #f44336, #d32f2f);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 500;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}