/* ============================================
   JAWAD'S BIKE PARTS - AUTH SYSTEM CSS
   Professional Dark Theme Authentication
   ============================================ */

/* Auth Screen Container */
#auth-screen {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, #0a0e1a 0%, #1a1f35 100%);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    overflow: hidden;
}

#auth-screen.active {
    display: flex;
}

/* Animated Background Pattern */
#auth-screen::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    animation: bgFloat 20s ease-in-out infinite;
}

@keyframes bgFloat {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(20px, 20px); }
}

/* Container */
.auth-container {
    width: 100%;
    max-width: 480px;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* Card */
.auth-card {
    background: rgba(21, 27, 45, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

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

/* Brand Section */
.auth-brand {
    text-align: center;
    margin-bottom: 30px;
    animation: fadeIn 0.8s ease-out 0.2s backwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.auth-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 15px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
    animation: logoFloat 3s ease-in-out infinite;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.auth-brand h1 {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0 0 5px 0;
}

.auth-brand p {
    color: #94a3b8;
    font-size: 0.95rem;
    margin: 0;
}

/* Tabs */
.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    background: rgba(10, 14, 26, 0.5);
    padding: 6px;
    border-radius: 12px;
}

.auth-tab-btn {
    flex: 1;
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: #94a3b8;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.auth-tab-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
}

.auth-tab-btn.active {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

/* Forms */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: formSlide 0.4s ease-out;
}

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

.auth-title {
    font-size: 1.8rem;
    font-weight: 800;
    color: #f8fafc;
    text-align: center;
    margin: 0;
}

.auth-subtitle {
    text-align: center;
    color: #94a3b8;
    font-size: 0.95rem;
    margin: -10px 0 10px 0;
}

/* Form Groups */
.form-group {
    position: relative;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #cbd5e0;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.form-group label i {
    color: #3b82f6;
}

/* Input Fields */
.auth-input {
    width: 100%;
    padding: 14px 16px;
    background: rgba(10, 14, 26, 0.5);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: #f8fafc;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.auth-input:focus {
    outline: none;
    border-color: #3b82f6;
    background: rgba(10, 14, 26, 0.7);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.auth-input::placeholder {
    color: #64748b;
}

/* Password Strength Indicator */
.password-strength {
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-top: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.password-strength::after {
    content: '';
    display: block;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #ef4444, #f59e0b, #10b981);
    transition: width 0.3s ease;
}

.password-strength.weak::after { width: 33%; background: #ef4444; }
.password-strength.medium::after { width: 66%; background: #f59e0b; }
.password-strength.strong::after { width: 100%; background: #10b981; }

/* Submit Button */
.auth-submit-btn {
    padding: 16px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    margin-top: 10px;
}

.auth-submit-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.auth-submit-btn:hover::before {
    transform: translateX(100%);
}

.auth-submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.4);
}

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

.btn-loader {
    display: none;
}

.auth-submit-btn.loading .btn-text {
    display: none;
}

.auth-submit-btn.loading .btn-loader {
    display: inline-block;
}

/* Error & Success Messages */
.auth-error {
    color: #fca5a5;
    font-size: 0.9rem;
    text-align: center;
    padding: 12px;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 8px;
    border-left: 4px solid #ef4444;
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.auth-success {
    color: #6ee7b7;
    font-size: 0.9rem;
    text-align: center;
    padding: 12px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 8px;
    border-left: 4px solid #10b981;
    animation: slideDown 0.4s ease;
}

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

/* Footer */
.auth-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: #94a3b8;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.auth-link {
    color: #3b82f6;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.auth-link:hover {
    color: #8b5cf6;
    text-decoration: underline;
}

/* Email Verification Notice */
.verify-notice {
    text-align: center;
    padding: 30px;
    animation: fadeInScale 0.5s ease;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.verify-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.verify-notice h3 {
    font-size: 1.6rem;
    font-weight: 800;
    color: #f8fafc;
    margin: 0 0 10px 0;
}

.verify-notice p {
    color: #94a3b8;
    margin: 10px 0;
    line-height: 1.6;
}

.verify-email {
    display: inline-block;
    padding: 12px 20px;
    background: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    font-weight: 700;
    border-radius: 8px;
    margin: 15px 0;
    font-size: 1.1rem;
}

.verify-instruction {
    font-size: 0.95rem;
    color: #cbd5e0;
    margin: 20px 0;
}

.verify-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.resend-btn, .change-email-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.resend-btn {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
}

.resend-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.resend-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.change-email-btn {
    background: rgba(10, 14, 26, 0.5);
    color: #cbd5e0;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.change-email-btn:hover {
    background: rgba(10, 14, 26, 0.7);
    border-color: rgba(255, 255, 255, 0.2);
}

.verify-timer {
    margin-top: 15px;
    color: #64748b;
    font-size: 0.9rem;
}

.verify-timer span {
    color: #3b82f6;
    font-weight: 700;
}

/* Verification Success */
.verification-success {
    text-align: center;
    padding: 40px 30px;
    animation: fadeInScale 0.6s ease;
}

.success-animation {
    margin-bottom: 30px;
}

.success-checkmark {
    width: 120px;
    height: 120px;
    margin: 0 auto;
    position: relative;
}

.check-icon {
    width: 120px;
    height: 120px;
    position: relative;
    border-radius: 50%;
    box-sizing: content-box;
    border: 4px solid #10b981;
}

.icon-line {
    height: 5px;
    background-color: #10b981;
    display: block;
    border-radius: 2px;
    position: absolute;
    z-index: 10;
}

.icon-line.line-tip {
    top: 55px;
    left: 30px;
    width: 25px;
    transform: rotate(45deg);
    animation: checkTip 0.75s;
}

.icon-line.line-long {
    top: 48px;
    right: 15px;
    width: 50px;
    transform: rotate(-45deg);
    animation: checkLong 0.75s;
}

@keyframes checkTip {
    0% { width: 0; left: 5px; top: 25px; }
    54% { width: 0; left: 5px; top: 25px; }
    70% { width: 30px; left: 0; top: 40px; }
    84% { width: 20px; left: 15px; top: 50px; }
    100% { width: 25px; left: 30px; top: 55px; }
}

@keyframes checkLong {
    0% { width: 0; right: 50px; top: 60px; }
    65% { width: 0; right: 50px; top: 60px; }
    84% { width: 60px; right: 0; top: 35px; }
    100% { width: 50px; right: 15px; top: 48px; }
}

.icon-circle {
    top: -4px;
    left: -4px;
    z-index: 10;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    position: absolute;
    box-sizing: content-box;
    border: 4px solid rgba(16, 185, 129, 0.2);
}

.icon-fix {
    top: 10px;
    width: 7px;
    left: 32px;
    z-index: 1;
    height: 100px;
    position: absolute;
    transform: rotate(-45deg);
    background-color: rgba(21, 27, 45, 0.95);
}

.verification-success h3 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #f8fafc;
    margin: 20px 0 10px 0;
}

.verification-success p {
    color: #94a3b8;
    font-size: 1.05rem;
    margin-bottom: 30px;
}

.continue-btn {
    padding: 16px 40px;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border: none;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    50% { box-shadow: 0 0 0 15px rgba(16, 185, 129, 0); }
}

.continue-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.4);
    animation: none;
}

/* Divider */
.auth-divider {
    position: relative;
    text-align: center;
    margin: 30px 0;
}

.auth-divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.auth-divider span {
    position: relative;
    background: rgba(21, 27, 45, 0.95);
    padding: 0 15px;
    color: #64748b;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Google Sign In */
.google-signin-wrapper {
    margin-top: 0;
}

.google-signin-btn {
    width: 100%;
    padding: 14px;
    background: rgba(10, 14, 26, 0.5);
    color: #f8fafc;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.3s ease;
}

.google-signin-btn:hover {
    background: rgba(10, 14, 26, 0.7);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.google-signin-btn i {
    font-size: 1.3rem;
    color: #4285f4;
}

/* Decorative Floating Elements */
.auth-decoration {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.floating-atom {
    position: absolute;
    font-size: 3rem;
    color: rgba(59, 130, 246, 0.1);
    animation: float 6s ease-in-out infinite;
}

.atom-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.atom-2 {
    top: 60%;
    right: 15%;
    animation-delay: 2s;
}

.atom-3 {
    bottom: 15%;
    left: 20%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-30px) rotate(180deg);
    }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .auth-container {
        padding: 15px;
    }
    
    .auth-card {
        padding: 30px 25px;
        border-radius: 20px;
    }
    
    .auth-logo {
        width: 70px;
        height: 70px;
        font-size: 2rem;
    }
    
    .auth-brand h1 {
        font-size: 1.6rem;
    }
    
    .auth-brand p {
        font-size: 0.85rem;
    }
    
    .auth-title {
        font-size: 1.5rem;
    }
    
    .auth-subtitle {
        font-size: 0.85rem;
    }
    
    .auth-tab-btn {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
    
    .auth-tab-btn i {
        display: none;
    }
    
    .auth-footer {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .verify-icon {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }
    
    .verify-notice h3 {
        font-size: 1.4rem;
    }
    
    .verify-email {
        font-size: 0.95rem;
        padding: 10px 15px;
    }
    
    .verify-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .resend-btn, .change-email-btn {
        width: 100%;
        justify-content: center;
    }
    
    .success-checkmark {
        width: 100px;
        height: 100px;
    }
    
    .check-icon {
        width: 100px;
        height: 100px;
    }
    
    .icon-circle {
        width: 100px;
        height: 100px;
    }
    
    .verification-success h3 {
        font-size: 1.5rem;
    }
    
    .continue-btn {
        width: 100%;
        justify-content: center;
    }
    
    .floating-atom {
        font-size: 2rem;
    }
}