/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Colorful Palette */
    --bg-primary: #FFF9F5;
    --bg-secondary: #FFFFFF;
    --lavender: #E8D5F2;
    --lavender-dark: #D4B5E8;
    --mint: #D5F2E3;
    --mint-dark: #B8E8CC;
    --peach: #FFE5D9;
    --peach-dark: #FFD0BB;
    --skyblue: #D9E9FF;
    --skyblue-dark: #BAD7FF;
    --coral: #FFD4D4;
    --coral-dark: #FFB8B8;
    --yellow: #FFF4D9;
    --yellow-dark: #FFE8B3;
    --text-primary: #4A4A4A;
    --text-secondary: #7A7A7A;
    --text-light: #A0A0A0;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Screen Management */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: block;
}

/* Login Screen */
#login-screen.active {
    display: flex !important;
    background: linear-gradient(135deg, var(--lavender) 0%, var(--mint) 100%);
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.6s ease-in;
}

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

.login-container {
    background: var(--bg-secondary);
    padding: 60px 50px;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 450px;
    width: 90%;
    animation: slideUp 0.6s ease-out;
}

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

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--lavender-dark), var(--mint-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 40px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

input[type="text"],
input[type="file"],
select,
textarea {
    width: 100%;
    padding: 14px 20px;
    border: 2px solid var(--lavender);
    border-radius: 12px;
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: var(--transition);
}

input[type="text"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--lavender-dark);
    box-shadow: 0 0 0 4px rgba(232, 213, 242, 0.2);
}

/* Buttons */
.primary-btn,
.secondary-btn {
    padding: 14px 32px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.primary-btn {
    background: linear-gradient(135deg, var(--lavender-dark), var(--skyblue-dark));
    color: white;
    box-shadow: var(--shadow-sm);
}

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

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

.primary-btn.large {
    padding: 16px 40px;
    font-size: 1.1rem;
    width: 100%;
}

.secondary-btn {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--lavender);
}

.secondary-btn:hover {
    background: var(--lavender);
    transform: translateY(-2px);
}

/* Onboarding Screen */
#onboarding-screen.active {
    display: flex !important;
    background: linear-gradient(135deg, var(--peach) 0%, var(--yellow) 100%);
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.onboarding-container {
    background: var(--bg-secondary);
    padding: 60px;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    max-width: 900px;
    width: 90%;
    animation: fadeIn 0.6s ease-in;
}

.onboarding-step {
    display: none;
}

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

.onboarding-step h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.onboarding-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.onboarding-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.feature-card {
    background: linear-gradient(135deg, var(--lavender) 0%, var(--mint) 100%);
    padding: 32px 24px;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 12px;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Style Grid */
.style-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.style-option {
    cursor: pointer;
}

.style-card {
    background: var(--bg-secondary);
    border: 3px solid var(--lavender);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.style-card:hover {
    border-color: var(--lavender-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-sm);
}

.style-option.selected .style-card {
    background: var(--lavender);
    border-color: var(--lavender-dark);
    box-shadow: var(--shadow-md);
}

.style-emoji {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 12px;
}

.style-card h3 {
    font-size: 1rem;
    font-weight: 600;
}

/* Size Form */
.size-form {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

/* Main Navigation */
.main-nav {
    background: var(--bg-secondary);
    padding: 20px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand h2 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--lavender-dark), var(--mint-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 10px 20px;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: 10px;
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--lavender);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--lavender);
    color: var(--text-primary);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.points-badge {
    background: linear-gradient(135deg, var(--yellow), var(--peach));
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: var(--shadow-sm);
}

.points-icon {
    font-size: 1.1rem;
}

.username {
    font-weight: 600;
    color: var(--text-primary);
}

.logout-btn {
    background: transparent;
    border: 2px solid var(--lavender);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 10px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logout-btn:hover {
    background: var(--coral);
    border-color: var(--coral-dark);
    transform: translateY(-2px);
}

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

/* Page Container */
.page-container {
    padding: 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.page {
    display: none;
    animation: fadeIn 0.4s ease-in;
}

.page.active {
    display: block;
}

/* Page Headers */
.page-header {
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.page-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 8px;
}

/* Dashboard */
.dashboard-header {
    margin-bottom: 40px;
}

.dashboard-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.stat-card {
    padding: 32px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-card.lavender {
    background: var(--lavender);
}

.stat-card.mint {
    background: var(--mint);
}

.stat-card.peach {
    background: var(--peach);
}

.stat-card.skyblue {
    background: var(--skyblue);
}

.stat-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.dashboard-actions {
    margin-bottom: 40px;
}

.dashboard-actions h2 {
    font-size: 1.8rem;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.action-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.action-card {
    background: var(--bg-secondary);
    padding: 32px;
    border-radius: 20px;
    border: 2px solid var(--lavender);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.action-card:hover {
    border-color: var(--lavender-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    background: var(--lavender);
}

.action-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 16px;
}

.action-card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.action-card p {
    color: var(--text-secondary);
}

/* Filters */
.filters {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.filters select {
    flex: 1;
    max-width: 250px;
}

/* Items Grid */
.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.item-card {
    background: var(--bg-secondary);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.item-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.item-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    background: linear-gradient(135deg, var(--lavender), var(--mint));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
}

.item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.item-info {
    padding: 20px;
}

.item-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.item-brand {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 12px;
}

.item-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.tag {
    padding: 4px 12px;
    background: var(--lavender);
    border-radius: 12px;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.item-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.item-points {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.item-points .points-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Sell Form */
.sell-form {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    max-width: 900px;
}

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

.form-section h3 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.form-section:last-child {
    margin-bottom: 0;
}

/* Image Upload */
.image-upload {
    margin-bottom: 12px;
}

.image-preview {
    width: 100%;
    height: 300px;
    border: 3px dashed var(--lavender);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    overflow: hidden;
    position: relative;
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    padding: 20px;
    transition: var(--transition);
}

.upload-btn:hover {
    color: var(--text-primary);
}

.upload-icon {
    font-size: 3rem;
}

.helper-text {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Points Estimate */
.points-estimate {
    background: linear-gradient(135deg, var(--yellow), var(--peach));
    padding: 40px;
    border-radius: 16px;
    text-align: center;
}

.estimate-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.estimate-label {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Closet Tabs */
.closet-tabs {
    display: flex;
    gap: 12px;
}

.tab-btn {
    padding: 10px 24px;
    background: var(--bg-secondary);
    border: 2px solid var(--lavender);
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    color: var(--text-primary);
}

.tab-btn:hover {
    background: var(--lavender);
}

.tab-btn.active {
    background: var(--lavender);
    border-color: var(--lavender-dark);
}

.closet-tab-content {
    display: none;
    margin-top: 32px;
}

.closet-tab-content.active {
    display: block;
}

/* Subscription Grid */
.subscription-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.subscription-card {
    background: var(--bg-secondary);
    padding: 40px 32px;
    border-radius: 20px;
    border: 3px solid;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.subscription-card.free {
    border-color: var(--lavender);
}

.subscription-card.premium {
    border-color: var(--skyblue);
}

.subscription-card.unlimited {
    border-color: var(--peach);
}

.subscription-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--skyblue-dark), var(--lavender-dark));
    color: white;
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.subscription-card h3 {
    font-size: 1.8rem;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 32px;
}

.price span {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.features {
    list-style: none;
    text-align: left;
    margin-bottom: 32px;
}

.features li {
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--lavender);
}

.features li:last-child {
    border-bottom: none;
}

.subscribe-btn {
    width: 100%;
    padding: 14px 32px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    background: linear-gradient(135deg, var(--lavender-dark), var(--skyblue-dark));
    color: white;
}

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

.subscription-card.free .subscribe-btn {
    background: var(--lavender);
    color: var(--text-primary);
    cursor: default;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-in;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 40px;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease-out;
    position: relative;
}

.item-modal-content {
    max-width: 900px;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal h2 {
    font-size: 2rem;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.modal-subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* Sentiment Questions */
.sentiment-questions {
    margin-bottom: 32px;
}

.question {
    margin-bottom: 28px;
}

.question label {
    display: block;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.rating-stars {
    display: flex;
    gap: 8px;
    font-size: 2rem;
}

.star {
    cursor: pointer;
    opacity: 0.3;
    transition: var(--transition);
}

.star:hover,
.star.active {
    opacity: 1;
    transform: scale(1.2);
}

.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 400;
    cursor: pointer;
    padding: 12px;
    border-radius: 8px;
    transition: var(--transition);
}

.radio-group label:hover {
    background: var(--lavender);
}

.radio-group input[type="radio"] {
    width: auto;
    cursor: pointer;
}

.modal-actions {
    display: flex;
    gap: 12px;
}

.modal-actions button {
    flex: 1;
}

/* Item Detail Modal */
.item-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.item-detail-image {
    width: 100%;
    height: 400px;
    border-radius: 16px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--lavender), var(--mint));
    display: flex;
    align-items: center;
    justify-content: center;
}

.item-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.item-detail-info {
    display: flex;
    flex-direction: column;
}

.item-detail-info h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.item-detail-info .item-brand {
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.item-detail-info .item-tags {
    margin-bottom: 24px;
}

.item-description {
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
    flex-grow: 1;
}

.item-detail-info .item-points {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 24px;
}

.item-detail-info .points-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.item-detail-info .points-label {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .page-container {
        padding: 20px;
    }
    
    .main-nav {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .page-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
    }
    
    .stats-grid,
    .action-cards,
    .items-grid,
    .subscription-grid {
        grid-template-columns: 1fr;
    }
    
    .item-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .item-detail-image {
        height: 300px;
    }
    
    .login-container,
    .onboarding-container {
        padding: 40px 30px;
    }
    
    .sell-form {
        padding: 24px;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .filters select {
        max-width: 100%;
    }
}

/* Loading States */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

/* Success Messages */
.success-message {
    background: var(--mint);
    padding: 16px 24px;
    border-radius: 12px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideDown 0.3s ease-out;
}

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

.success-message .icon {
    font-size: 1.5rem;
}