:root {
    --primary-color: #3498db;
    --secondary-color: #8e44ad;
    --background-color: #f4f7f6;
    --text-color: #333;
    --card-background: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --error-color: #e74c3c;
    --success-color: #2ecc71;
}

html[data-theme='dark'] {
    --primary-color: #3498db;
    --secondary-color: #9b59b6;
    --background-color: #1a1a1a;
    --text-color: #e0e0e0;
    --card-background: #2c2c2c;
    --border-color: #444;
    --shadow: 0 2px 8px rgba(0,0,0,0.4);
}

/* --- Base & Layout --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

#app-shell {
    max-width: 1000px;
    min-height: 100vh;
    margin: 0 auto;
    background-color: var(--card-background);
    display: flex;
    flex-direction: column;
}

main {
    flex-grow: 1;
    padding: 1rem;
}
@media (min-width: 768px) {
    main {
        padding: 2rem;
    }
}

/* --- Header --- */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 0 1rem;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}
.header-inner h1 a {
    font-size: 1.5rem;
    margin: 0;
    color: white;
    text-decoration: none;
}
.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}
#theme-toggle-button {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
}

/* --- Footer --- */
footer {
    background-color: #333;
    color: #aaa;
    text-align: center;
    padding: 2rem 1rem;
    font-size: 0.9rem;
}
.footer-nav {
    margin-top: 0.5rem;
}
.footer-nav a {
    color: #fff;
    text-decoration: none;
    margin: 0 10px;
}
.footer-nav a:hover {
    text-decoration: underline;
}


/* --- Router & Views --- */
.view-container {
    padding: 1rem;
}

/* Landing Page */
.hero-section {
    text-align: center;
    padding: 4rem 1rem;
}
.hero-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}
.hero-section p {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto 2rem auto;
}
html[data-theme='dark'] .hero-section p {
    color: #bbb;
}
.cta-button {
    font-size: 1.2rem !important;
    padding: 1rem 2rem !important;
}


/* --- App Components --- */

/* Tabs */
.tab-nav {
    display: flex;
    justify-content: space-around;
    background-color: var(--card-background);
    border-bottom: 1px solid var(--border-color);
}
.tab-link {
    flex-grow: 1;
    padding: 1rem;
    text-align: center;
    text-decoration: none;
    color: #777;
    border-bottom: 3px solid transparent;
    transition: color 0.2s, border-bottom-color 0.2s;
}
html[data-theme='dark'] .tab-link {
    color: #aaa;
}
.tab-link:hover {
    color: var(--primary-color);
}
.tab-link.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: bold;
}
.tab-content {
    padding-top: 1.5rem;
}
.tab-description {
    margin-bottom: 2rem;
    font-size: 0.95rem;
}


/* Forms & Buttons */
.form-group {
    margin-bottom: 1.5rem;
}
label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}
input[type="text"],
input[type="number"],
input[type="file"],
select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    background-color: var(--background-color);
    color: var(--text-color);
    border-radius: 5px;
    font-size: 1rem;
    box-sizing: border-box;
}
.primary-button, .secondary-button {
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.2s;
}
.primary-button {
    background-color: var(--primary-color);
}
.primary-button:hover {
    background-color: #2980b9;
}
.secondary-button {
    background-color: var(--secondary-color);
}
.secondary-button:hover {
    background-color: #802f8a;
}
.primary-button:disabled {
    background-color: #a9cce3;
    cursor: not-allowed;
}
.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}


/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}
.closet-card, .saved-ootd-card, .recommendation-card {
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}
.closet-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}
.closet-card .card-info {
    padding: 0.8rem;
    font-size: 0.9rem;
}
.closet-card .card-info p {
    margin: 0.2rem 0;
}
.delete-button {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(0,0,0,0.6);
    color: white;
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 28px;
    text-align: center;
    padding: 0;
    opacity: 0;
    transition: opacity 0.2s;
}
.closet-card:hover .delete-button {
    opacity: 1;
}

.recommendation-card, .saved-ootd-card {
    padding: 1rem;
}
.ootd-item {
    margin: 0.5rem 0;
}
.saved-date {
    font-size: 0.8rem;
    color: #777;
}

/* States (Empty, Loading) & Messages */
.hidden {
    display: none !important;
}
.empty-state, .loading-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 1rem;
    color: #777;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
}
.status-message {
    margin-top: 1rem;
    color: var(--success-color);
}

/* Closet Specific */
#new-item-form {
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-top: 1rem;
}
#image-preview-container {
    margin-bottom: 1rem;
    text-align: center;
}
#image-preview-container img {
    max-width: 100%;
    max-height: 250px;
    border-radius: 5px;
}

/* OOTD Specific */
#ootd-result {
    margin-top: 1.5rem;
}
#weather-info {
    font-weight: bold;
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.6);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal-content {
    background-color: var(--card-background);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.modal-header h2 {
    margin: 0;
}
.close-button {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-color);
}
.modal-body {
    overflow-y: auto;
    padding: 1.5rem;
}
.sample-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.sample-filters select {
    width: 50%;
}
#sample-items-grid .closet-card {
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}
#sample-items-grid .closet-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.15);
}
#sample-items-grid .closet-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}