:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --dark-bg: #2d3436;
    --light-bg: #f8f9fa;
    --text-light: #ffffff;
    --text-dark: #333333;
    --border-color: #dee2e6;
    --shadow-color: rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    background-color: var(--light-bg);
    color: var(--text-dark);
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--dark-bg);
    color: var(--text-light);
    padding: 2rem 1rem;
    text-align: center;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

main {
    flex-grow: 1;
    padding: 2rem 1rem;
}

.search-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 8px var(--shadow-color);
    padding: 1.5rem;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.tab-button {
    background: none;
    border: none;
    padding: 1rem 1.5rem;
    cursor: pointer;
    font-size: 1.1rem;
    color: #6c757d;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease-in-out;
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-button:disabled {
    color: #ced4da;
    cursor: not-allowed;
}

.search-box {
    display: flex;
}

#search-input {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px 0 0 4px;
    font-size: 1.1rem;
    outline: none;
}

#search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

#search-button {
    background-color: var(--primary-color);
    color: var(--text-light);
    border: 1px solid var(--primary-color);
    padding: 0.75rem 1.5rem;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
    font-size: 1.1rem;
    transition: background-color 0.2s;
}

#search-button:hover {
    background-color: var(--primary-hover);
}

.results-container {
    max-width: 800px;
    margin: 2rem auto 0;
}

#results-area {
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 8px var(--shadow-color);
    padding: 1.5rem;
}

.package-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

#version-select {
    padding: 0.5rem;
    font-size: 1rem;
}

#file-browser {
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

#file-browser ul {
    list-style: none;
    padding: 0;
}

#file-browser li {
    padding: 0.5rem;
    cursor: pointer;
    border-radius: 4px;
}

#file-browser li:hover {
    background-color: var(--light-bg);
}

#content-display-area {
    margin-top: 2rem;
}

#back-button {
    margin-bottom: 1rem;
    background: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
}

#file-content {
    background-color: #ffffff;
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 4px 8px var(--shadow-color);
    white-space: pre-wrap;
    word-wrap: break-word;
    max-height: 600px;
    overflow-y: auto;
}

footer {
    background-color: var(--dark-bg);
    color: var(--text-light);
    padding: 1rem;
    text-align: center;
    margin-top: auto;
}

.hidden {
    display: none;
}