/* ===================================
   BulkReplaceTool - Auth Pages Styles
   assets/css/auth.css
   =================================== */

/* ===================================
   Auth Layout
   =================================== */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 1.5rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    padding: 3rem 2rem;
    position: relative;
    z-index: 10;
}

/* ===================================
   Auth Forms
   =================================== */
.auth-form {
    margin-top: 2rem;
}

.auth-form .form-group {
    margin-bottom: 1.5rem;
}

.auth-form .form-input {
    padding-left: 3rem;
}

.auth-form .form-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
    font-size: 1.125rem;
}

/* Password Toggle */
.password-toggle {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    padding: 0.5rem;
}

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

/* Remember Me Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    margin-right: 0.5rem;
    cursor: pointer;
}

/* ===================================
   Social Login
   =================================== */
.social-divider {
    position: relative;
    text-align: center;
    margin: 2rem 0;
}

.social-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: #e5e7eb;
}

.social-divider span {
    background: white;
    padding: 0 1rem;
    position: relative;
    color: #6b7280;
    font-size: 0.875rem;
}

.social-login-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.social-login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 0.5rem;
    background: white;
    color: #374151;
    font-weight: 500;
    transition: all 0.2s;
    cursor: pointer;
}

.social-login-btn:hover {
    background: #f9fafb;
    border-color: #d1d5db;
    transform: translateY(-1px);
}

.social-login-btn i {
    margin-right: 0.5rem;
    font-size: 1.25rem;
}

.social-login-btn.google i { color: #ea4335; }
.social-login-btn.github i { color: #333; }
.social-login-btn.linkedin i { color: #0077b5; }

/* ===================================
   Password Strength Indicator
   =================================== */
.password-strength-container {
    margin-top: 0.5rem;
}

.password-strength-bar {
    height: 0.25rem;
    background: #e5e7eb;
    border-radius: 9999px;
    overflow: hidden;
}

.password-strength-fill {
    height: 100%;
    transition: width 0.3s ease, background-color 0.3s ease;
}

.password-strength-text {
    font-size: 0.75rem;
    margin-top: 0.25rem;
    transition: color 0.3s ease;
}

/* Strength Levels */
.strength-weak { background-color: #ef4444; }
.strength-fair { background-color: #f59e0b; }
.strength-good { background-color: #3b82f6; }
.strength-strong { background-color: #10b981; }

/* ===================================
   Auth Animations
   =================================== */
.auth-logo {
    display: inline-flex;
    align-items: center;
    margin-bottom: 2rem;
    animation: fadeInDown 0.6s ease-out;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-card {
    animation: scaleIn 0.4s ease-out;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Form field animations */
.form-group {
    animation: slideUp 0.5s ease-out;
    animation-fill-mode: both;
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   Loading States
   =================================== */
.btn-loading {
    position: relative;
    color: transparent;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 1.25rem;
    height: 1.25rem;
    top: 50%;
    left: 50%;
    margin-left: -0.625rem;
    margin-top: -0.625rem;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spinner 0.6s linear infinite;
}

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

/* ===================================
   Error States
   =================================== */
.form-error {
    border-color: #ef4444 !important;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

.error-message {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
}

.error-message i {
    margin-right: 0.25rem;
    font-size: 0.75rem;
}

/* ===================================
   Success States
   =================================== */
.form-success {
    border-color: #10b981 !important;
}

.success-message {
    color: #10b981;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
}

.success-message i {
    margin-right: 0.25rem;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 640px) {
    .auth-card {
        padding: 2rem 1.5rem;
    }
    
    .social-login-grid {
        grid-template-columns: 1fr;
    }
    
    .auth-logo {
        font-size: 1.5rem;
    }
}

/* ===================================
   Background Effects
   =================================== */
.auth-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.3;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    top: -200px;
    right: -200px;
    animation: float-slow 20s ease-in-out infinite;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    bottom: -150px;
    left: -150px;
    animation: float-slow 25s ease-in-out infinite reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: float-slow 30s ease-in-out infinite;
}

@keyframes float-slow {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}