/* ==================== SIZEVIBE APP STYLES ==================== */
/* Loading, Auth, and Onboarding Screens */

/* ==================== LOADING SCREEN ==================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--color-background) 0%, #FBF9F3 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
    animation: fadeInUp 0.6s ease-out;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.logo-icon {
    font-size: 3rem;
    animation: bounce 2s infinite;
}

.logo-text {
    font-family: var(--font-family-display);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    background: linear-gradient(135deg, var(--color-interactive) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.loading-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.loading-bar {
    width: 200px;
    height: 4px;
    background: var(--color-border-light);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 0 auto;
}

.loading-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--color-interactive) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-full);
    animation: loadingProgress 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

@keyframes loadingProgress {
    0% { width: 0%; }
    50% { width: 70%; }
    100% { width: 100%; }
}

/* ==================== AUTH SCREEN ==================== */
.auth-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--color-background) 0%, #FBF9F3 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.auth-container {
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
    padding: var(--space-4);
}

.auth-card {
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border-light);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.logo-large {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.logo-large .logo-icon {
    font-size: 2.5rem;
}

.logo-large .logo-text {
    font-size: var(--font-size-2xl);
}

.auth-header h1 {
    font-family: var(--font-family-display);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.auth-header p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

.auth-tabs {
    display: flex;
    margin-bottom: var(--space-6);
    background: var(--color-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-1);
}

.auth-tab {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: none;
    border: none;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.auth-tab.active {
    background: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.auth-form {
    margin-bottom: var(--space-6);
}

.input-group {
    margin-bottom: var(--space-4);
}

.input-group input {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background: var(--color-surface);
    transition: border-color var(--transition-base);
    outline: none;
}

.input-group input:focus {
    border-color: var(--color-interactive);
    box-shadow: 0 0 0 3px rgba(232, 180, 184, 0.1);
}

.auth-submit {
    width: 100%;
    padding: var(--space-4);
    background: linear-gradient(135deg, var(--color-interactive) 0%, var(--color-secondary) 100%);
    color: var(--color-surface);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.auth-submit:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.auth-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.spinner {
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

.spinner circle {
    stroke-dasharray: 125;
    stroke-dashoffset: 125;
    animation: strokeDash 1.5s ease-in-out infinite;
}

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

@keyframes strokeDash {
    0% { stroke-dashoffset: 125; }
    50% { stroke-dashoffset: 31.25; }
    100% { stroke-dashoffset: 125; }
}

.auth-message {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-align: center;
    margin-top: var(--space-4);
    display: none;
}

.auth-message.error {
    background: rgba(255, 68, 68, 0.1);
    color: #FF4444;
    border: 1px solid rgba(255, 68, 68, 0.2);
}

.auth-message.success {
    background: rgba(0, 200, 81, 0.1);
    color: #00C851;
    border: 1px solid rgba(0, 200, 81, 0.2);
}

.auth-message.info {
    background: rgba(0, 212, 255, 0.1);
    color: #00D4FF;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

/* ==================== ONBOARDING SCREEN ==================== */
/* Enhanced Professional Onboarding with Comprehensive User Profiling */
.onboarding-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--color-background) 0%, #FBF9F3 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: var(--space-4);
}

.onboarding-container {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.onboarding-progress {
    text-align: center;
    margin-bottom: var(--space-8);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-border-light);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--space-3);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-interactive) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-full);
    transition: width 0.3s ease-out;
    width: 33.33%;
}

.progress-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.onboarding-content {
    background: var(--color-surface);
    border-radius: var(--radius-2xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border-light);
    margin-bottom: var(--space-6);
    min-height: 400px;
}

.onboarding-step {
    display: none;
    text-align: center;
}

.onboarding-step.active {
    display: block;
    animation: fadeInUp 0.4s ease-out;
}

.onboarding-step h2 {
    font-family: var(--font-family-display);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.onboarding-step p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-6);
}

.feature-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    text-align: left;
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-tertiary);
    border-radius: var(--radius-lg);
}

.feature-icon {
    font-size: var(--font-size-xl);
}

.measurement-form {
    text-align: left;
}

.measurement-row {
    margin-bottom: var(--space-4);
}

.measurement-row label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.measurement-row input {
    width: 100%;
    padding: var(--space-3);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    outline: none;
    transition: border-color var(--transition-base);
}

.measurement-row input:focus {
    border-color: var(--color-interactive);
}

.measurement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-4);
}

.measurement-item label {
    font-size: var(--font-size-sm);
}

.preferences-grid {
    text-align: left;
}

.preference-category {
    margin-bottom: var(--space-6);
}

.preference-category label {
    display: block;
    margin-bottom: var(--space-3);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

.option-buttons {
    display: flex;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.option-btn {
    flex: 1;
    padding: var(--space-3);
    border: 2px solid var(--color-border-light);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.option-btn.active {
    border-color: var(--color-interactive);
    background: rgba(232, 180, 184, 0.1);
    color: var(--color-primary);
}

.brand-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--space-2);
}

.brand-btn {
    padding: var(--space-3);
    border: 2px solid var(--color-border-light);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.brand-btn.active {
    border-color: var(--color-secondary);
    background: rgba(212, 175, 55, 0.1);
    color: var(--color-primary);
}

.onboarding-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-interactive) 0%, var(--color-secondary) 100%);
    color: var(--color-surface);
    border: none;
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border: 2px solid var(--color-border-light);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    border-color: var(--color-interactive);
    background: var(--color-tertiary);
}

/* ==================== DASHBOARD SCREEN ==================== */
.dashboard-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--color-background);
    z-index: 9999;
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 640px) {
    .auth-card {
        padding: var(--space-6);
    }
    
    .onboarding-content {
        padding: var(--space-6);
        min-height: 350px;
    }
    
    .measurement-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .option-buttons {
        flex-direction: column;
    }
    
    .brand-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .onboarding-actions {
        flex-direction: column;
        gap: var(--space-3);
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }
}

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

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
    100% {
        transform: scale(1);
    }
}

/* ==================== ENHANCED ONBOARDING STYLES ==================== */

/* Personal Information Form */
.personal-info-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.info-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.info-item label {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.info-item input,
.info-item select {
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    background: var(--color-surface);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.info-item input:focus,
.info-item select:focus {
    outline: none;
    border-color: var(--color-interactive);
    box-shadow: 0 0 0 3px rgba(232, 180, 184, 0.1);
}

/* Measurement Methods - Horizontal Compact Layout */
.measurement-methods {
    display: flex;
    gap: var(--space-4);
    justify-content: space-between;
    flex-wrap: wrap;
}

.method-option {
    background: var(--color-surface);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 300px;
}

.method-option:hover {
    border-color: var(--color-interactive);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.method-option.selected {
    border-color: var(--color-secondary);
    background: rgba(212, 175, 55, 0.05);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

.method-icon {
    font-size: 2rem;
    margin-bottom: var(--space-2);
}

.method-option h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.method-option p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-3);
    font-size: var(--font-size-xs);
    line-height: 1.4;
}

.method-features {
    display: flex;
    gap: var(--space-1);
    justify-content: center;
    margin-bottom: var(--space-3);
    flex-wrap: wrap;
}

.feature-tag {
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

.feature-tag.accuracy {
    background: rgba(135, 169, 107, 0.1);
    color: var(--color-success);
}

.feature-tag.time {
    background: rgba(212, 175, 55, 0.1);
    color: var(--color-secondary);
}

.download-btn, .app-link-btn, .guide-btn {
    background: linear-gradient(135deg, var(--color-interactive), var(--color-secondary));
    color: var(--color-surface);
    border: none;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    font-size: var(--font-size-xs);
}

.download-btn:hover, .app-link-btn:hover, .guide-btn:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-sm);
}

/* Measurement Categories */
.measurement-categories {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.measurement-tier {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    border: 2px solid var(--color-border-light);
}

.measurement-tier.essential {
    border-color: var(--color-interactive);
    background: rgba(232, 180, 184, 0.02);
}

.measurement-tier.beneficial {
    border-color: var(--color-secondary);
    background: rgba(212, 175, 55, 0.02);
}

.tier-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
}

.tier-badge {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tier-badge.essential {
    background: var(--color-interactive);
    color: var(--color-surface);
}

.tier-badge.beneficial {
    background: var(--color-secondary);
    color: var(--color-surface);
}

.tier-header h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    margin: 0;
}

.measurement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.measurement-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.measurement-item label {
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.measurement-item input {
    padding: var(--space-3) var(--space-4);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    background: var(--color-surface);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.measurement-item input:focus {
    outline: none;
    border-color: var(--color-interactive);
    box-shadow: 0 0 0 3px rgba(232, 180, 184, 0.1);
}

.measurement-tip {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    font-style: italic;
    margin-top: var(--space-1);
}

.skip-option {
    margin-top: var(--space-6);
    text-align: center;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border-light);
}

.skip-btn {
    background: none;
    border: 2px solid var(--color-border-medium);
    color: var(--color-text-secondary);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
}

.skip-btn:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

/* Color Analysis - Horizontal Compact Layout */
.color-analysis-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.skin-tone-analysis {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    border: 2px solid var(--color-border-light);
}

.tone-category {
    margin-bottom: var(--space-4);
}

.tone-category label {
    display: block;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    color: var(--color-primary);
    margin-bottom: var(--space-3);
}

.tone-buttons {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    justify-content: center;
}

.tone-btn {
    background: var(--color-surface);
    border: 2px solid var(--color-border-light);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-base);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    flex: 1;
    min-width: 100px;
    max-width: 140px;
}

.tone-btn:hover {
    border-color: var(--color-interactive);
    transform: translateY(-1px);
}

.tone-btn.active {
    border-color: var(--color-secondary);
    background: rgba(212, 175, 55, 0.1);
    color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(212, 175, 55, 0.2);
}

.depth-buttons {
    display: flex;
    gap: var(--space-1);
    flex-wrap: wrap;
    justify-content: center;
}

.depth-btn {
    border: 2px solid var(--color-border-light);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-xs);
    transition: all var(--transition-base);
    min-width: 80px;
    text-align: center;
}

.depth-btn:hover {
    border-color: var(--color-interactive);
    transform: translateY(-1px);
}

.depth-btn.active {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 2px rgba(212, 175, 55, 0.2);
}

.color-help {
    margin-top: var(--space-4);
    padding: var(--space-3);
    background: var(--color-tertiary);
    border-radius: var(--radius-md);
}

.color-help h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.help-tips {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.tip {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    line-height: 1.4;
}

.tip strong {
    color: var(--color-primary);
}

@media (max-width: 768px) {
    .info-row {
        grid-template-columns: 1fr;
    }
    
    .measurement-methods {
        grid-template-columns: 1fr;
    }
    
    .tone-buttons {
        grid-template-columns: 1fr 1fr;
    }
    
    .depth-buttons {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    }
}
}