:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --accent: #06b6d4;
    --bg-dark: #000000;
    --bg-card: #000000;
    --bg-input: #0a0a0a;
    --text: #ffffff;
    --text-muted: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --success: #10b981;
    --error: #ef4444;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    overflow: hidden;
}

.auth-wrapper {
    display: flex;
    height: 100vh;
    width: 100%;
    padding-bottom: 60px;
}

/* Left Side - Branding */
.auth-branding {
    flex: 1;
    background: #000000;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px;
}

.brand-logo-corner {
    position: absolute;
    top: 40px;
    left: 40px;
    z-index: 20;
    animation: fadeIn 0.8s ease-out;
}

.brand-logo-corner img {
    height: 60px;
    width: auto;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.3));
}

.branding-content {
    position: relative;
    z-index: 10;
    max-width: 500px;
    animation: fadeInLeft 0.8s ease-out;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.branding-content h1 {
    font-size: 48px;
    font-weight: 700;
    color: white;
    margin-bottom: 24px;
    line-height: 1.2;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

.branding-content p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    text-shadow: none;
    margin-bottom: 32px;
}

/* Feature List */
.feature-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
}

.feature-item svg {
    width: 20px;
    height: 20px;
    color: #3b82f6;
    flex-shrink: 0;
}

/* Right Side - Forms */
.auth-forms {
    flex: 1;
    background: var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px;
    position: relative;
    overflow: hidden;
}

.auth-form {
    display: none;
    width: 100%;
    max-width: 420px;
    animation: fadeIn 0.4s ease-out;
    position: relative;
    z-index: 10;
}

.auth-form.active {
    display: block;
}

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

.form-header {
    margin-bottom: 40px;
}

.form-header h2 {
    font-size: 12px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.6);
    letter-spacing: 2px;
    margin-bottom: 12px;
    text-shadow: none;
}

.form-subtitle {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 400;
    line-height: 1.5;
    margin: 0;
}

/* Messages */
.error-message,
.success-message {
    padding: 12px 16px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    max-height: 0;
    overflow: hidden;
    padding-top: 0;
    padding-bottom: 0;
    margin-bottom: 0;
}

.error-message {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.success-message {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #6ee7b7;
}

.error-message.show,
.success-message.show {
    opacity: 1;
    transform: translateY(0);
    max-height: 100px;
    padding: 12px 16px;
    margin-bottom: 20px;
}

.error-message.hide,
.success-message.hide {
    opacity: 0;
    transform: translateY(-10px);
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-bottom: 0;
}

.form-body {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Input Groups */
.input-group {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: rgba(255, 255, 255, 0.5);
    pointer-events: none;
    z-index: 1;
}

.input-icon svg {
    width: 100%;
    height: 100%;
}

.input-group input {
    width: 100%;
    padding: 14px 16px 14px 48px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #ffffff;
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.input-group input::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

/* Form Options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: -8px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
}

.remember-me input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    position: relative;
    transition: all 0.3s ease;
}

.remember-me input[type="checkbox"]:checked {
    background: #3b82f6;
    border-color: #3b82f6;
    animation: checkboxPop 0.3s ease-out;
}

.remember-me input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    animation: checkmarkDraw 0.3s ease-out 0.1s both;
}

@keyframes checkboxPop {
    0% {
        transform: scale(0.8);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes checkmarkDraw {
    0% {
        opacity: 0;
        transform: rotate(45deg) scale(0);
    }
    100% {
        opacity: 1;
        transform: rotate(45deg) scale(1);
    }
}

.remember-me a {
    color: var(--primary-light);
    text-decoration: none;
}

.remember-me a:hover {
    text-decoration: underline;
}

.forgot-password {
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.3s ease;
}

.forgot-password:hover {
    color: #ffffff;
}

/* Primary Button */
.btn-primary {
    width: 100%;
    padding: 14px 24px;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    border: none;
    border-radius: 8px;
    color: #ffffff;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 12px;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
}

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

/* Form Footer */
.form-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.form-footer p {
    font-size: 14px;
    color: var(--text-muted);
}

.form-footer a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.form-footer a:hover {
    opacity: 0.8;
}

/* Form Divider */
.form-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 24px 0;
}

.form-divider::before,
.form-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
}

.form-divider span {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Social Login */
.social-login {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.social-btn {
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

.social-btn svg {
    width: 18px;
    height: 18px;
}

/* Google Button - Red/Blue/Yellow/Green */
.social-btn:first-child svg path:nth-child(1) {
    fill: #4285f4;
}

.social-btn:first-child svg path:nth-child(2) {
    fill: #34a853;
}

.social-btn:first-child svg path:nth-child(3) {
    fill: #fbbc05;
}

.social-btn:first-child svg path:nth-child(4) {
    fill: #ea4335;
}

/* GitHub Button - White */
.social-btn:last-child svg {
    fill: #ffffff;
}

/* Password Toggle Button */
.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.password-toggle:hover {
    color: rgba(255, 255, 255, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.password-toggle:active {
    transform: translateY(-50%) scale(0.95);
}

.password-toggle svg {
    width: 20px;
    height: 20px;
    transition: all 0.3s ease;
}

/* Eye icon animations - only on toggle */
.password-toggle .eye-open.toggle-animation,
.password-toggle .eye-closed.toggle-animation {
    animation: eyeToggle 0.3s ease-out;
}

@keyframes eyeToggle {
    0% {
        opacity: 0;
        transform: scale(0.5) rotate(-15deg);
    }
    50% {
        transform: scale(1.1) rotate(5deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

/* Password Strength Indicator */
.password-strength {
    margin-top: 8px;
}

.strength-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: 6px;
}

.strength-fill {
    height: 100%;
    width: 0%;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.strength-fill.weak {
    width: 33%;
    background: #ef4444;
}

.strength-fill.medium {
    width: 66%;
    background: #f59e0b;
}

.strength-fill.strong {
    width: 100%;
    background: #10b981;
}

.strength-text {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

/* Loading Spinner */
.btn-primary.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn-primary.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spinner 0.6s linear infinite;
}

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

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

.shake {
    animation: shake 0.5s;
}

/* Footer */
.auth-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 16px 40px;
    z-index: 100;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.footer-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.footer-left p {
    margin: 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}

.version {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: rgba(255, 255, 255, 0.9);
}

/* Responsive */
@media (max-width: 968px) {
    .auth-branding {
        display: none;
    }

    .auth-forms {
        padding: 40px 24px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .footer-left {
        flex-direction: column;
        gap: 8px;
    }
}

@media (max-width: 640px) {
    .auth-forms {
        padding: 32px 20px;
    }

    .branding-content h1 {
        font-size: 36px;
    }
}