/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90E2;
    --primary-hover: #357ABD;
    --error-color: #E74C3C;
    --success-color: #2ECC71;
    --text-color: #2C3E50;
    --bg-color: #F5F7FA;
    --card-bg: #FFFFFF;
    --border-color: #E1E8ED;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

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

/* Container Styles */
.auth-container {
    width: 100%;
    max-width: 440px;
}

.auth-card {
    background: var(--card-bg);
    border-radius: 16px;
    box-shadow: var(--shadow);
    padding: 40px;
    transition: transform 0.3s ease;
}

.auth-card:hover {
    transform: translateY(-2px);
}

/* Header Styles */
.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-header h1 {
    font-size: 28px;
    color: var(--text-color);
    margin-bottom: 8px;
    font-weight: 600;
}

.auth-header p {
    color: #7F8C8D;
    font-size: 14px;
    line-height: 1.5;
}

/* Form Styles */
.auth-form {
    margin-bottom: 24px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    outline: none;
    background: var(--bg-color);
}

.form-group input:focus {
    border-color: var(--primary-color);
    background: #FFFFFF;
    box-shadow: 0 0 0 4px rgba(74, 144, 226, 0.1);
}

.form-group input.error {
    border-color: var(--error-color);
}

.form-group input.success {
    border-color: var(--success-color);
}

.error-message {
    display: block;
    color: var(--error-color);
    font-size: 12px;
    margin-top: 4px;
    min-height: 18px;
}

/* Button Styles */
.btn-primary {
    width: 100%;
    padding: 14px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary.loading {
    color: transparent;
}

.btn-primary.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    transform: translate(-50%, -50%);
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Status Message */
.status-message {
    text-align: center;
    padding: 12px;
    margin-bottom: 20px;
    border-radius: 8px;
    font-size: 14px;
    display: none;
}

.status-message.success {
    display: block;
    background: rgba(46, 204, 113, 0.1);
    color: #27AE60;
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.status-message.error {
    display: block;
    background: rgba(231, 76, 60, 0.1);
    color: #C0392B;
    border: 1px solid rgba(231, 76, 60, 0.3);
}

/* Language Selector */
.language-selector {
    display: flex;
    gap: 8px;
    justify-content: center;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.lang-btn {
    padding: 8px 16px;
    border: 2px solid var(--border-color);
    background: transparent;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-color);
}

.lang-btn:hover {
    background: var(--bg-color);
}

.lang-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* RTL Support */
html[dir="rtl"] .auth-container {
    direction: rtl;
}

html[dir="rtl"] .form-group input {
    text-align: right;
}

/* Responsive Design */
@media (max-width: 480px) {
    .auth-card {
        padding: 24px;
    }
    
    .auth-header h1 {
        font-size: 24px;
    }
    
    .language-selector {
        flex-wrap: wrap;
    }
    
    .lang-btn {
        flex: 1;
        min-width: calc(33.333% - 8px);
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.auth-card {
    animation: fadeIn 0.5s ease-out;
}