:root {
    --border-color: #ccc;
    --background-color: #f0f0f0;
    --active-tab-bg: #fff;
    --inactive-tab-bg: #e0e0e0;
    --button-bg: #007bff;
    --button-text-color: #fff;
    --text-color: #333;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background-color);
}

#reader-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    background-color: var(--active-tab-bg);
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

#top-bar {
    display: flex;
    padding: 8px;
    border-bottom: 1px solid var(--border-color);
}

#url-input {
    flex-grow: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
}

#search-btn {
    padding: 8px 16px;
    margin-left: 8px;
    background-color: var(--button-bg);
    color: var(--button-text-color);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

#search-btn:hover {
    opacity: 0.9;
}

#tab-bar-container {
    background-color: var(--background-color);
    padding: 0 5px;
    flex-shrink: 0;
}

#tabs-list {
    display: flex;
    overflow-x: auto;
    scrollbar-width: thin;
}
/* For Chrome/Safari */
#tabs-list::-webkit-scrollbar {
  height: 5px;
}
#tabs-list::-webkit-scrollbar-track {
  background: var(--background-color);
}
#tabs-list::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 10px;
}


.tab-item {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-bottom: none;
    margin-top: 5px;
    border-top-left-radius: 6px;
    border-top-right-radius: 6px;
    background-color: var(--inactive-tab-bg);
    cursor: pointer;
    white-space: nowrap;
    position: relative;
    max-width: 200px;
}

.tab-item.active {
    background-color: var(--active-tab-bg);
    z-index: 2;
    border-bottom: 1px solid var(--active-tab-bg);
    margin-bottom: -1px;
}

.tab-title {
    overflow: hidden;
    text-overflow: ellipsis;
    padding-right: 5px;
}

.close-tab-btn {
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    padding: 0 4px;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    line-height: 18px;
    text-align: center;
}

.close-tab-btn:hover {
    background-color: #ddd;
}

#content-area {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    border-top: 1px solid var(--border-color);
    line-height: 1.6;
    color: var(--text-color);
}

.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #888;
    text-align: center;
}

.welcome-screen p {
    margin-top: 10px;
    max-width: 400px;
}

#content-area.loading .welcome-screen h1,
#content-area.loading .welcome-screen p {
    display: none;
}

#content-area.loading::after {
    content: '加载中...';
    font-size: 24px;
    color: #888;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

#content-area.hide-images .content-image {
    display: none;
}

#content-area img.content-image {
    max-width: 80%;
    height: auto;
    display: block;
    margin: 15px auto;
    border: 1px solid var(--border-color);
    padding: 5px;
    border-radius: 4px;
}

.search-results-container {
    padding: 10px;
}

.search-results-container h2 {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
    margin-top: 0;
}

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

.search-result-item {
    margin-bottom: 15px;
}

.search-result-item a {
    font-size: 1.2em;
    color: var(--button-bg);
    text-decoration: none;
    cursor: pointer;
}

.search-result-item a:hover {
    text-decoration: underline;
}

.search-result-item p {
    margin: 5px 0 0;
    color: #555;
    font-size: 0.9em;
}

#controls {
    padding: 10px 20px;
    border-top: 1px solid var(--border-color);
    background-color: var(--background-color);
    display: flex;
    gap: 20px;
    flex-shrink: 0;
}

#controls label {
    display: flex;
    align-items: center;
    cursor: pointer;
}

#controls input[type="checkbox"] {
    margin-right: 8px;
}