/* static/css/style.css (FINAL AND COMPLETE VERSION) */

/* --- Space Theme Palette --- */
:root {
    --bg-color: #0d1117;
    --sidebar-bg: #161b22;
    --card-bg: rgba(22, 27, 34, 0.9);
    --input-bg: #0d1117;
    --text-color: #c9d1d9;
    --text-color-secondary: #8b949e;
    --primary-color: #58a6ff;
    --primary-color-glow: rgba(88, 166, 255, 0.5);
    --border-color: #30363d;
    --accent-green: #2ea043;
    --accent-red: #da3633;
    --accent-gold: #ffd700;
}

/* --- General & Body Styles --- */
* {
    box-sizing: border-box;
}

html {
    height: 100%;
}

body {
    font-family: 'Roboto', -apple-system, sans-serif;
    margin: 0;
    color: var(--text-color);
    /* These lines add the image */
    background-image: url('../images/folder/692368.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    /* This line sets the solid color fallback */
    background-color: var(--bg-color);

    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    background-color: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 {
    margin: 0;
    font-family: 'Arial', sans-serif;
}

main {
    flex-grow: 1;
    overflow-y: auto;
    background-color: transparent;
}

.user-info a {
    color: var(--primary-color);
    text-decoration: none;
    margin-left: 1rem;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* --- Reusable Orange Button Style --- */
.back-button-style {
    background-color: #e67e22;
    color: #ffffff;
    border: none;
    padding: 10px 18px;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background-color 0.2s ease;
}

.back-button-style:hover {
    background-color: #d35400;
}

/* --- Level Selection --- */
#level-selection-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
    padding: 2rem;
}

.level-card {
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
}

.level-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0 20px var(--primary-color-glow);
}

.level-card img {
    width: 100%;
    display: block;
}

/* --- Lesson View Layout --- */
#lesson-view.active {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.page-container {
    display: flex;
    flex-grow: 1;
    overflow: hidden;
    background-color: transparent;
}

#sidebar {
    width: 350px;
    min-width: 250px;
    background-color: rgba(22, 27, 34, 0.85);
    backdrop-filter: blur(10px);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

#resize-handle {
    width: 5px;
    background-color: var(--border-color);
    cursor: col-resize;
}

#main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background-color: transparent;
}

/* --- Sidebar Content --- */
.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

#folders {
    list-style-type: none;
    padding: 0;
    margin: 0;
    overflow-y: auto;
    flex-grow: 1;
}

#folders li {
    padding: 1rem 1.5rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#folders li:hover,
#folders li.selected {
    background-color: rgba(88, 166, 255, 0.1);
}

.folder-info {
    flex-grow: 1;
}

.folder-star-container {
    display: flex;
    align-items: center;
}

/* --- Main Content Area (Lessons Page) --- */
#folder-content {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.folder-content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(22, 27, 34, 0.85);
    backdrop-filter: blur(10px);
}

.lesson-selector label {
    margin-right: 10px;
    font-weight: bold;
}

#folder-select {
    padding: 8px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
    width: 300px;
    background-color: var(--input-bg);
    color: var(--text-color);
}

.action-button.secondary {
    background-color: #1E8449;
    color: #ffffff;
    font-weight: bold;
    padding: 10px 18px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.action-button.secondary:hover {
    background-color: #145A32;
}

.sentence-area {
    padding: 1.5rem;
    flex-grow: 1;
    overflow-y: auto;
}

.sentence-header {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    background-color: transparent;
    transition: background-color 0.3s ease;
}

.sentence-header.header-active {
    background-color: #228B22;
}

.sentence-header h2,
.sentence-header p {
    color: var(--text-color);
}

.sentence-header.header-active h2,
.sentence-header.header-active p {
    color: #f0f0f0;
}

.sentence-header h2 {
    font-family: 'Arial', sans-serif;
}

#folder-sentences li {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    margin-bottom: 10px;
}

.playable-sentence {
    padding: 15px;
    cursor: pointer;
}

.chinese {
    font-size: 1.2rem;
}

.pinyin {
    color: var(--primary-color);
}

.meaning {
    color: var(--text-color-secondary);
}

.welcome-message {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    color: var(--text-color-secondary);
    background: transparent;
}

/* --- Review Page Styles --- */
.review-container {
    width: 90%;
    max-width: 1100px;
    margin: 2rem auto;
    padding: 2.5rem;
    background-color: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.review-header {
    margin-bottom: 1.5rem;
}

.review-container h1 {
    font-family: 'Arial', sans-serif;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.lesson-selector-bar {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1.5rem;
}

#review-folder-select {
    flex-grow: 1;
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 6px;
}

.audio-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

#correct-count-value {
    font-size: 3em;
    font-weight: bold;
    font-family: 'Arial', monospace;
}

/* Find and replace the old rules with this new block in static/css/style.css */

.review-stat-display {
    display: flex;
    /* This makes the number and word sit in a row */
    align-items: baseline;
    /* This aligns them nicely at the bottom */
    color: var(--primary-color);
    font-family: 'Orbitron', sans-serif;
}

.review-stat-label {
    /* 'display: block' and 'margin-top' have been removed */
    font-size: 1.2em;
    color: var(--text-color-secondary);
    margin-left: 0.5rem;
    /* Adds a nice space between the number and the word */
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-area {
    display: flex;
    gap: 10px;
    margin-bottom: 1rem;
}

#user-input {
    flex-grow: 1;
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    border-radius: 6px;
}

#mic-button {
    background-color: #555;
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0 15px;
}

#mic-button.recording {
    background-color: var(--accent-red);
}

.result {
    min-height: 50px;
    margin-bottom: 1rem;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
}

.result.correct {
    background-color: rgba(46, 160, 67, 0.2);
    color: var(--accent-green);
}

.result.incorrect {
    background-color: rgba(218, 54, 51, 0.2);
    color: var(--accent-red);
}

.navigation-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.navigation-buttons .nav-button {
    flex: 1;
    padding: 12px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    color: white;
    font-weight: bold;
    transition: background-color 0.2s ease;
    font-size: 1rem;
}

#prev-button {
    background-color: #555;
}

#play-button {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

#check-answer-button {
    background-color: #3CB371;
}

#meaning-button {
    background-color: #1E8449;
}

#next-button {
    background-color: var(--primary-color);
    color: var(--bg-color);
}

#prev-button:hover {
    background-color: #6a6a6a;
}

#play-button:hover,
#next-button:hover {
    opacity: 0.8;
}

#check-answer-button:hover {
    background-color: #2E8B57;
}

#meaning-button:hover {
    background-color: #145A32;
}

.navigation-buttons .nav-button:disabled {
    background-color: var(--card-bg);
    cursor: not-allowed;
    opacity: 0.6;
}

/* --- CONSOLIDATED SIDEBAR STAR STYLES --- */
#folders .folder-star {
    color: var(--text-color-secondary);
    transition: color 0.2s ease, transform 0.2s ease;
    cursor: pointer;
    transform: scale(1);
}

#folders .folder-star.pinned {
    color: #FFD700;
    transform: scale(1.2);
}