/**
 * Central Duality - Auth Pages Styles
 * 
 * Login e Registro
 * 
 * @package CentralDuality
 * @version 2.0.0
 */

/* ============================================
   VARIABLES
   ============================================ */
:root {
    --color-bg-primary: #030711;
    --color-bg-secondary: #0a0f1a;
    --color-bg-tertiary: #12162a;
    --color-bg-card: rgba(15, 20, 35, 0.9);
    
    --color-primary: #6D28D2;
    --color-primary-light: #8b5cf6;
    --color-primary-dark: #5a1fb3;
    --color-secondary: #a855f7;
    
    --gradient-primary: linear-gradient(135deg, #6D28D2 0%, #a855f7 100%);
    --gradient-purple: linear-gradient(135deg, #6D28D2 0%, #c084fc 100%);
    
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #64748b;
    
    --color-border: rgba(109, 40, 210, 0.2);
    --color-border-light: rgba(255, 255, 255, 0.1);
    
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    --shadow-glow: 0 0 40px rgba(109, 40, 210, 0.3);
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* ============================================
   RESET
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg-primary);
    color: var(--color-text-secondary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary);
}

/* ============================================
   AUTH CONTAINER
   ============================================ */
.auth-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
}

@media (max-width: 991px) {
    .auth-container {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   AUTH BRAND (Left Side)
   ============================================ */
.auth-brand {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    background: var(--color-bg-secondary);
    overflow: hidden;
}

.auth-brand__bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.auth-brand__content {
    position: relative;
    z-index: 1;
    max-width: 400px;
}

.auth-brand__logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.auth-brand__logo img {
    width: 48px;
    height: 48px;
}

.auth-brand__logo span {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.auth-brand__text h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.auth-brand__text p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.auth-brand__features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.auth-feature i {
    font-size: 1.25rem;
    color: var(--color-primary-light);
}

.auth-feature span {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

@media (max-width: 991px) {
    .auth-brand {
        display: none;
    }
}

/* ============================================
   AUTH FORM CONTAINER (Right Side)
   ============================================ */
.auth-form-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--color-bg-primary);
}

.auth-form-wrapper {
    width: 100%;
    max-width: 420px;
}

.auth-form-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-form-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.auth-form-header p {
    color: var(--color-text-muted);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 480px) {
    .form-row-2 {
        grid-template-columns: 1fr;
    }
}

.form-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-label i {
    font-size: 1rem;
    color: var(--color-primary-light);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    font-family: inherit;
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    outline: none;
    transition: all var(--transition-fast);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.form-input:invalid:not(:placeholder-shown) {
    border-color: var(--color-error);
}

.form-input-group {
    position: relative;
    display: flex;
}

.form-input-group .form-input {
    padding-right: 3rem;
}

.form-input-toggle {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.5rem;
    color: var(--color-text-muted);
    background: none;
    border: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.form-input-toggle:hover {
    color: var(--color-text-primary);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ============================================
   PASSWORD STRENGTH
   ============================================ */
.password-strength {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.25rem;
}

.password-strength__bar {
    flex: 1;
    height: 4px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.password-strength__bar::after {
    content: '';
    display: block;
    height: 100%;
    width: 0;
    background: var(--color-error);
    transition: all var(--transition-base);
}

.password-strength[data-strength="1"] .password-strength__bar::after {
    width: 25%;
    background: var(--color-error);
}

.password-strength[data-strength="2"] .password-strength__bar::after {
    width: 50%;
    background: var(--color-warning);
}

.password-strength[data-strength="3"] .password-strength__bar::after {
    width: 75%;
    background: #84cc16;
}

.password-strength[data-strength="4"] .password-strength__bar::after {
    width: 100%;
    background: var(--color-success);
}

.password-strength__text {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    min-width: 60px;
}

/* ============================================
   CHECKBOX
   ============================================ */
.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.form-checkbox input {
    display: none;
}

.checkbox-mark {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.checkbox-mark::after {
    content: '✓';
    font-size: 0.75rem;
    color: white;
    opacity: 0;
    transform: scale(0);
    transition: all var(--transition-fast);
}

.form-checkbox input:checked + .checkbox-mark {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.form-checkbox input:checked + .checkbox-mark::after {
    opacity: 1;
    transform: scale(1);
}

.form-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.form-link {
    font-size: 0.875rem;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(139, 92, 246, 0.5);
}

.btn--lg {
    padding: 1rem 1.5rem;
    font-size: 1rem;
}

.btn--block {
    width: 100%;
}

.btn--social {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
}

.btn--social:hover {
    border-color: var(--color-border);
    background: var(--color-bg-card);
}

.btn__text,
.btn__loader {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn__loader {
    display: none;
}

.btn.loading .btn__text {
    display: none;
}

.btn.loading .btn__loader {
    display: flex;
}

.btn.loading .btn__loader i {
    animation: spin 1s linear infinite;
}

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

/* ============================================
   AUTH DIVIDER
   ============================================ */
.auth-divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border-light);
}

.auth-divider span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* ============================================
   AUTH SOCIAL
   ============================================ */
.auth-social {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* ============================================
   AUTH FOOTER
   ============================================ */
.auth-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border-light);
}

.auth-footer p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: var(--radius-lg);
    margin-bottom: 1rem;
    font-size: 0.875rem;
    animation: slideIn 0.3s ease-out;
}

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

.alert i {
    font-size: 1.25rem;
    margin-top: 0.125rem;
}

.alert--success {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.alert--error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.alert--warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fbbf24;
}

.alert--info {
    background: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #60a5fa;
}

/* ============================================
   MOBILE LOGO (shown on mobile)
   ============================================ */
@media (max-width: 991px) {
    .auth-form-wrapper::before {
        content: '';
        display: block;
        width: 60px;
        height: 60px;
        margin: 0 auto 1.5rem;
        background: url('../img/logo1.png') center/contain no-repeat;
    }
}

/* ============================================
   WELCOME SCREEN
   ============================================ */
.welcome-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: all 0.3s ease;
    overflow: hidden;
}

.welcome-content {
    max-width: 800px;
    text-align: center;
    padding: 2rem;
    position: relative;
    z-index: 2;
    animation: welcomeFadeIn 0.8s ease;
}

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

.welcome-logo {
    margin-bottom: 2rem;
    animation: welcomeLogoScale 0.8s ease 0.2s both;
}

@keyframes welcomeLogoScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.welcome-logo img {
    height: 120px;
    width: auto;
    filter: drop-shadow(0 10px 30px rgba(109, 40, 210, 0.4));
}

.welcome-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    line-height: 1.2;
    animation: welcomeTextSlide 0.8s ease 0.4s both;
}

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

.welcome-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    animation: welcomeTextSlide 0.8s ease 0.6s both;
}

.welcome-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 4rem;
    animation: welcomeButtonsSlide 0.8s ease 0.8s both;
}

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

.welcome-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-family: var(--font-family);
}

.welcome-btn--primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 10px 30px rgba(109, 40, 210, 0.3);
}

.welcome-btn--primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(109, 40, 210, 0.4);
}

.welcome-btn--outline {
    background: transparent;
    color: var(--color-primary-light);
    border: 2px solid var(--color-primary);
}

.welcome-btn--outline:hover {
    background: rgba(109, 40, 210, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(109, 40, 210, 0.2);
}

.welcome-features {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    animation: welcomeFeaturesSlide 0.8s ease 1s both;
}

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

.welcome-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-text-secondary);
}

.welcome-feature svg {
    color: var(--color-primary);
    filter: drop-shadow(0 5px 15px rgba(109, 40, 210, 0.3));
}

.welcome-feature span {
    font-size: 0.875rem;
    font-weight: 500;
}

/* Particles Animation */
.welcome-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: particleFloat 3s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(109, 40, 210, 0.5);
}

@keyframes particleFloat {
    0%, 100% {
        opacity: 0;
        transform: translateY(0) scale(0);
    }
    50% {
        opacity: 0.6;
        transform: translateY(-100px) scale(1);
    }
}

/* Auth Container - Hidden by default */
.auth-container {
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .welcome-title {
        font-size: 1.75rem;
    }
    
    .welcome-subtitle {
        font-size: 1rem;
    }
    
    .welcome-logo img {
        height: 80px;
    }
    
    .welcome-actions {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto 3rem;
    }
    
    .welcome-btn {
        width: 100%;
        justify-content: center;
    }
    
    .welcome-features {
        gap: 1.5rem;
    }
    
    .welcome-feature {
        font-size: 0.75rem;
    }
}

/* ============================================
   SIMPLIFIED LOGIN BOX
   ============================================ */
.auth-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
    opacity: 0;
    transform: scale(0.95);
    transition: all 300ms ease;
}

.login-box {
    width: 100%;
    max-width: 480px;
    background: rgba(15, 20, 35, 0.95);
    border: 1px solid rgba(109, 40, 210, 0.3);
    border-radius: 2rem;
    padding: 3rem;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 80px rgba(109, 40, 210, 0.15);
    backdrop-filter: blur(20px);
    animation: slideIn 400ms ease-out;
}

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

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-logo {
    margin-bottom: 1.5rem;
}

.login-logo img {
    height: 90px;
    width: auto;
    filter: drop-shadow(0 4px 20px rgba(109, 40, 210, 0.4));
    animation: logoFloat 3s ease-in-out infinite;
}

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

.login-brand {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #6D28D2 0%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.login-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-muted);
}

/* Login Form */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-label svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: rgba(15, 20, 35, 0.8);
    border: 1px solid rgba(109, 40, 210, 0.3);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    font-size: 0.95rem;
    transition: all 200ms ease;
    outline: none;
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:focus {
    border-color: var(--color-primary);
    background: rgba(15, 20, 35, 0.95);
    box-shadow: 0 0 0 3px rgba(109, 40, 210, 0.1);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
    display: block;
}

.form-input-wrapper {
    position: relative;
}

.form-input-wrapper .form-input {
    padding-right: 3rem;
}

.password-toggle {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 200ms ease;
}

.password-toggle:hover {
    color: var(--color-primary);
}

.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: -0.5rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.checkbox-custom {
    display: none;
}

.forgot-link {
    font-size: 0.875rem;
    color: var(--color-primary);
    font-weight: 500;
    transition: color 200ms ease;
}

.forgot-link:hover {
    color: var(--color-primary-light);
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #6D28D2 0%, #a855f7 100%);
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 200ms ease;
    box-shadow: 0 4px 20px rgba(109, 40, 210, 0.3);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(109, 40, 210, 0.5);
}

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

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-submit.loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-submit.loading span {
    opacity: 0;
}

.btn-submit svg {
    width: 20px;
    height: 20px;
}

/* Loading spinner */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn-submit.loading::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(109, 40, 210, 0.2);
}

.divider span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

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

.btn-social {
    padding: 0.875rem 1rem;
    background: rgba(15, 20, 35, 0.8);
    border: 1px solid rgba(109, 40, 210, 0.3);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: all 200ms ease;
}

.btn-social:hover {
    border-color: var(--color-primary);
    background: rgba(109, 40, 210, 0.1);
    transform: translateY(-2px);
}

.btn-social svg {
    width: 20px;
    height: 20px;
}

.register-link {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.register-link a {
    color: var(--color-primary);
    font-weight: 600;
    transition: color 200ms ease;
}

.register-link a:hover {
    color: var(--color-primary-light);
}

.back-button {
    position: absolute;
    top: 2rem;
    left: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: rgba(15, 20, 35, 0.8);
    border: 1px solid rgba(109, 40, 210, 0.3);
    border-radius: var(--radius-lg);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 200ms ease;
    backdrop-filter: blur(10px);
}

.back-button:hover {
    border-color: var(--color-primary);
    background: rgba(109, 40, 210, 0.1);
    color: var(--color-primary);
}

.back-button svg {
    width: 20px;
    height: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    .login-box {
        padding: 2rem 1.5rem;
    }
    
    .login-logo img {
        height: 70px;
    }
    
    .login-brand {
        font-size: 1.75rem;
    }
    
    .social-buttons {
        grid-template-columns: 1fr;
    }
    
    .back-button {
        top: 1rem;
        left: 1rem;
        padding: 0.625rem 1rem;
    }
}