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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

nav {
    background-color: white;
    padding: 0;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
    align-items: center;
    position: relative;
    padding: 0.6rem 1rem;
    margin: 0;
}

nav ul .language-selector {
    margin-left: auto;
}

nav a {
    color: #1da1f2;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

.language-selector {
    position: relative;
}

.language-selector .dropdown-toggle::after {
    margin-left: 0.5rem;
}

.language-selector .btn-link {
    color: #1da1f2 !important;
    text-decoration: none;
    font-weight: 500;
    padding: 0;
    border: none;
}

.language-selector .btn-link:hover {
    opacity: 0.8;
}

.language-selector .dropdown-menu {
    margin-top: 0.5rem;
}

main {
    min-height: calc(100vh - 120px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
}

h1 {
    color: #1da1f2;
    margin-bottom: 1rem;
}

.page-header {
    text-align: center;
    font-size: 2rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 2rem;
    color: #1da1f2;
}

/* 使い方セクション */
.how-to-use {
    margin: 2rem 0;
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.how-to-use-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #333;
}

.steps-container {
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
    gap: 2rem;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #1da1f2;
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.step-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.step-text {
    font-size: 1rem;
    color: #333;
    line-height: 1.5;
}

h2 {
    color: #333;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

/* Accordion内のh2は除外 */
.accordion h2.accordion-header {
    margin-top: 0;
    margin-bottom: 0;
}

section {
    margin-top: 2rem;
}

/* Accordionのスタイル調整 */
.accordion {
    margin-top: 2rem;
}

.accordion-item {
    border: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: 0.375rem;
    margin-bottom: 0.5rem;
}

.accordion-button {
    font-weight: 500;
}

.accordion-button:not(.collapsed) {
    color: #1da1f2;
    background-color: #f8f9fa;
}

.accordion-body {
    padding: 1.25rem;
}

/* FAQセクション */
.faq-section {
    margin-top: 4rem;
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.faq-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #333;
}

.faq-section .accordion {
    margin-top: 0;
}

ul {
    margin-left: 2rem;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: 2rem;
}

/* フォームスタイル */
.form-section {
    width: 100%;
    background-color: #1da1f2;
    padding: 2rem 0;
    margin-bottom: 3rem;
}

.form-section .page-header {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 2rem;
    white-space: nowrap;
    color: white;
}

.form-section .page-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin-top: -1rem;
    margin-bottom: 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 2rem;
}

.page-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: #666;
    margin-top: -1rem;
    margin-bottom: 2rem;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 2rem;
}

.form-section .error-message {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    margin-top: 1rem;
    padding: 0 2rem;
}

.extract-form {
    margin-top: 2rem;
    padding: 0 2rem;
}

.extract-form .form-group,
.extract-form .button-wrapper {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.form-section .form-group label {
    color: white;
}

.input-with-button {
    position: relative;
}

.url-input {
    width: 100%;
    padding: 0.75rem 8rem 0.75rem 0.75rem;
    font-size: 1rem;
    border: none;
    border-radius: 4px;
    outline: none;
}

.url-input:focus {
    outline: none;
}

.paste-button {
    position: absolute;
    right: 0.25rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    background-color: #f5f5f5;
    color: #6c757d;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    height: 2.5rem;
}

.paste-button:hover {
    background-color: #e8e8e8;
}

.paste-button:active {
    background-color: #dcdcdc;
}

.paste-icon {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
}

.paste-button-text {
    display: inline-block;
    white-space: nowrap;
}

.form-hint {
    display: block;
    margin-top: 0.5rem;
    color: #666;
    font-size: 0.875rem;
}

.form-section .form-hint {
    color: rgba(255, 255, 255, 0.8);
}

.button-wrapper {
    text-align: center;
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
}

.submit-button {
    background-color: #1da1f2;
    color: white;
    padding: 0.875rem 3rem;
    font-size: 1.125rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s;
    min-width: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.submit-button:hover {
    background-color: #1a91da;
}

.submit-button:active {
    background-color: #0d7bb8;
}

.form-section .submit-button {
    background-color: #31c856;
}

.form-section .submit-button:hover {
    background-color: #3ca155;
}

.form-section .submit-button:active {
    background-color: #3ca155;
}

.form-section .submit-button .lucide-download-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

/* エラーメッセージ */
.error-message {
    background-color: #fee;
    border: 1px solid #fcc;
    color: #c33;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
}

/* 結果ページ */
.result-section {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #f9f9f9;
    border-radius: 4px;
}

.url-display {
    background-color: white;
    padding: 0.75rem;
    border-radius: 4px;
    border: 1px solid #ddd;
    word-break: break-all;
    font-family: monospace;
    margin-top: 0.5rem;
}

.action-buttons {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: background-color 0.3s;
}

.button {
    background-color: #1da1f2;
    color: white;
}

.button:hover {
    background-color: #1a91da;
}

.button-secondary {
    background-color: #666;
}

.button-secondary:hover {
    background-color: #555;
}

/* URLリスト */
.url-count {
    margin-bottom: 1rem;
    font-weight: 500;
    color: #1da1f2;
}

.url-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.url-list li {
    margin-bottom: 0.75rem;
    padding: 0.75rem;
    background-color: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    transition: border-color 0.3s;
}

.url-list li:hover {
    border-color: #1da1f2;
}

.media-link {
    color: #1da1f2;
    text-decoration: none;
    word-break: break-all;
    display: block;
}

.media-link:hover {
    text-decoration: underline;
}

.no-results {
    color: #666;
    font-style: italic;
    padding: 1rem;
    text-align: center;
}

/* Media Grid Styles */
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.media-item {
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    background: white;
}

.media-thumbnail-wrapper {
    position: relative;
    width: 100%;
}

.media-thumbnail {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.media-type-icon {
    position: absolute;
    bottom: 0.5rem;
    left: 0.5rem;
    width: 24px;
    height: 24px;
    color: white;
    background-color: rgba(0, 0, 0, 0.6);
    padding: 0.25rem;
    border-radius: 4px;
    pointer-events: none;
}

.media-item .media-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    text-align: center;
    background: #007bff;
    color: white;
    text-decoration: none;
    font-weight: 600;
}

.media-item .media-link:hover {
    background: #0056b3;
}

.media-item .media-link .lucide-download-icon {
    flex-shrink: 0;
}

/* Responsive adjustments for media grid */
@media (max-width: 768px) {
    .media-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }
    
    .media-thumbnail {
        height: 150px;
    }
}