/* styles/auth.css - Authentication Styles */

/* ===== AUTH SECTIONS ===== */
.auth-section {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--gradient-primary);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.auth-section.show {
    opacity: 1;
    visibility: visible;
}

.auth-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 25% 25%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

/* ===== AUTH CONTAINER ===== */
.auth-container {
    width: 100%;
    max-width: 440px;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* ===== AUTH CARD ===== */
.auth-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: slideUp 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ===== AUTH HEADER ===== */
.auth-header {
    background: var(--gradient-primary);
    color: white;
    padding: 32px;
    text-align: center;
    position: relative;
}

.auth-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

.back-btn {
    position: absolute;
    top: 24px;
    left: 24px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.auth-header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.auth-header p {
    opacity: 0.9;
    font-size: 1rem;
}

/* ===== AUTH FORM ===== */
.auth-form {
    padding: 40px 32px 32px;
}

.auth-form .form-group {
    margin-bottom: 24px;
}

.auth-form .form-group label {
    color: #374151;
    font-weight: 500;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.auth-form input {
    border: 2px solid #e5e7eb;
    border-radius: var(--border-radius);
    padding: 14px 16px;
    font-size: 16px;
    transition: var(--transition);
    background: white;
}

.auth-form input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.auth-form input:invalid:not(:placeholder-shown) {
    border-color: var(--danger);
    background: #fef2f2;
}

.auth-form input:valid:not(:placeholder-shown) {
    border-color: var(--success);
    background: #f0fff4;
}

/* ===== PASSWORD INPUT ===== */
.password-input {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
    font-size: 1rem;
}

.toggle-password:hover {
    background: #f3f4f6;
}

/* ===== PASSWORD STRENGTH ===== */
.password-strength {
    margin-top: 8px;
    height: 4px;
    background: #e5e7eb;
    border-radius: 2px;
    overflow: hidden;
    position: relative;
}

.password-strength::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: var(--danger);
    border-radius: 2px;
    transition: var(--transition);
    width: 0;
}

.password-strength.weak::after {
    width: 25%;
    background: var(--danger);
}

.password-strength.medium::after {
    width: 50%;
    background: var(--warning);
}

.password-strength.good::after {
    width: 75%;
    background: var(--info);
}

.password-strength.strong::after {
    width: 100%;
    background: var(--success);
}

/* ===== AUTH BUTTON ===== */
.auth-btn {
    width: 100%;
    padding: 16px 24px;
    font-size: 16px;
    font-weight: 600;
    margin-top: 8px;
    position: relative;
    overflow: hidden;
}

.auth-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.auth-btn:hover::before {
    width: 300px;
    height: 300px;
}

.auth-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.auth-btn:disabled::before {
    display: none;
}

/* ===== AUTH FOOTER ===== */
.auth-footer {
    padding: 24px 32px 32px;
    text-align: center;
    background: #f8fafc;
    border-top: 1px solid #e5e7eb;
}

.auth-footer p {
    color: #6b7280;
    font-size: 0.95rem;
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.auth-footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ===== FORM VALIDATION STYLES ===== */
.form-group.error input {
    border-color: var(--danger);
    background: #fef2f2;
    animation: shake 0.5s ease-in-out;
}

.form-group.success input {
    border-color: var(--success);
    background: #f0fff4;
}

.form-error {
    color: var(--danger);
    font-size: 0.875rem;
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-error::before {
    content: '⚠️';
    font-size: 0.875rem;
}

.form-success {
    color: var(--success);
    font-size: 0.875rem;
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-success::before {
    content: '✅';
    font-size: 0.875rem;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ===== LOADING STATES ===== */
.loading .btn-text {
    opacity: 0;
}

.loading .btn-loader {
    display: inline-block !important;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 480px) {
    .auth-container {
        padding: 16px;
        max-width: 100%;
    }
    
    .auth-card {
        border-radius: var(--border-radius);
    }
    
    .auth-header {
        padding: 24px 20px;
    }
    
    .back-btn {
        top: 16px;
        left: 16px;
    }
    
    .auth-header h2 {
        font-size: 1.5rem;
    }
    
    .auth-form {
        padding: 32px 20px 24px;
    }
    
    .auth-footer {
        padding: 20px;
    }
    
    .auth-form input {
        padding: 12px 14px;
    }
    
    .auth-btn {
        padding: 14px 20px;
    }
}

@media (max-width: 360px) {
    .auth-header {
        padding: 20px 16px;
    }
    
    .auth-form {
        padding: 24px 16px 20px;
    }
    
    .auth-footer {
        padding: 16px;
        font-size: 0.9rem;
    }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
    .auth-card {
        background: rgba(30, 41, 59, 0.95);
        color: #f1f5f9;
    }
    
    .auth-form input {
        background: rgba(51, 65, 85, 0.8);
        border-color: #475569;
        color: #f1f5f9;
    }
    
    .auth-form input::placeholder {
        color: #94a3b8;
    }
    
    .auth-form input:focus {
        background: rgba(51, 65, 85, 0.9);
        border-color: var(--primary);
    }
    
    .auth-footer {
        background: rgba(15, 23, 42, 0.8);
        border-color: #334155;
    }
    
    .toggle-password:hover {
        background: rgba(51, 65, 85, 0.6);
    }
}