.login-container {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--secondary-navy) 50%, var(--accent-blue) 100%);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grain)"/></svg>') repeat;
    opacity: 0.3;
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.shape {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: float 20s infinite linear;
}

.shape:nth-child(1) {
    width: 120px;
    height: 120px;
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.shape:nth-child(2) {
    width: 80px;
    height: 80px;
    top: 60%;
    right: 15%;
    animation-delay: -5s;
}

.shape:nth-child(3) {
    width: 60px;
    height: 60px;
    top: 80%;
    left: 20%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(90deg); }
    50% { transform: translateY(-10px) rotate(180deg); }
    75% { transform: translateY(-30px) rotate(270deg); }
}

.login-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 2;
    overflow: hidden;
}

.brand-section {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border-right: 1px solid var(--gray-200);
    position: relative;
}

.brand-logo {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-navy), var(--secondary-navy));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
}

.welcome-text {
    color: var(--primary-navy);
    font-family: var(--font-heading);
}

.welcome-subtitle {
    color: var(--gray-600);
    font-size: 1.1rem;
    line-height: 1.6;
}

.form-section {
    padding: 3rem;
}

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-title {
    color: var(--primary-navy);
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.login-subtitle {
    color: var(--gray-500);
    font-size: 1rem;
}

.form-floating {
    margin-bottom: 1.5rem;
}

.form-floating .form-control {
    height: 60px;
    border: 2px solid var(--gray-200);
    border-radius: 12px;
    padding: 1rem 1rem 0.5rem;
    background: var(--gray-50);
    transition: all 0.3s ease;
}

.form-floating .form-control:focus {
    background: white;
    border-color: var(--secondary-navy);
    box-shadow: 0 0 0 0.2rem rgba(49, 130, 206, 0.15);
    transform: translateY(-2px);
}

.form-floating label {
    padding: 1rem;
    color: var(--gray-500);
    font-weight: 500;
}

.input-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    z-index: 5;
    cursor: pointer;
    transition: color 0.3s ease;
}

.input-icon:hover {
    color: var(--secondary-navy);
}

.remember-forgot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.form-check-input:checked {
    background-color: var(--secondary-navy);
    border-color: var(--secondary-navy);
}

.forgot-link {
    color: var(--secondary-navy);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.forgot-link:hover {
    color: var(--primary-navy);
    text-decoration: underline;
}

.login-btn {
    width: 100%;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-navy), var(--secondary-navy));
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(30, 58, 95, 0.3);
}

.divider {
    display: flex;
    align-items: center;
    margin: 2rem 0;
    color: var(--gray-400);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

.divider span {
    padding: 0 1rem;
    font-size: 0.9rem;
}

.signup-link {
    text-align: center;
    color: var(--gray-600);
}

.signup-link a {
    color: var(--secondary-navy);
    text-decoration: none;
    font-weight: 600;
}

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

/* Thai language support */
.thai-text {
    font-family: var(--font-thai);
    line-height: 1.8;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .login-card {
        margin: 1rem;
        border-radius: 16px;
    }
    
    .brand-section {
        display: none;
    }
    
    .form-section {
        padding: 2rem 1.5rem;
    }
    
    .social-login {
        grid-template-columns: 1fr;
    }
}

/* Loading animation */
.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid white;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}