/* =============================
   Global Theme Variables
   ============================= */
:root {
  --bg: #f6f7f9;               /* page background */
  --primary: #329eff;          /* New primary color */
  --primary-dark: #1A88E6;     /* Darker version for hover/emphasis */
  --white: #ffffff;
  --text: #2a333c;             /* Main contrast color */
  --muted: #8D949B;            /* Muted text color */
  --card-bg: #ffffff;
  --border: #eeeeee;           /* Lighter border color */
  --shadow: 0 4px 15px rgba(0,0,0,0.05); /* Slightly softer shadow */
  --radius: 12px;              /* Slightly larger radius for a softer look */
  --transition: 0.25s ease;
  --nav-bg: rgba(255, 255, 255, 0.9);
}

[data-theme='dark'] {
    --bg: #1a202c;
    --text: #e2e8f0;
    --muted: #a0aec0;
    --card-bg: #2d3748;
    --border: #4a5568;
    --shadow: 0 4px 15px rgba(0,0,0,0.2);
    --primary: #4299e1;
    --primary-dark: #2b6cb0;
    --nav-bg: rgba(45, 55, 72, 0.9);
}

/* =============================
   Reset & Base
   ============================= */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7; /* Increased base line-height for better readability */
  padding-top: 80px; /* Add padding to prevent content from being hidden by the fixed nav */
  -webkit-font-smoothing: antialiased; /* Smoother font rendering */
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: auto;
  padding: 2rem 1.25rem;
}

h1 {
  text-align: center;
  color: var(--text);
  margin-bottom: 1rem;
  font-size: clamp(1.75rem, 2vw + 1rem, 2.25rem);
}

.description-container {
    text-align: center;
    color: #4a5568; /* Changed to a more visible gray */
    max-width: 1200px;
    margin: 0 auto 2rem; /* 0 auto for horizontal centering, 2rem for bottom margin */
    font-size: 1.05rem;
    line-height: 1.7;
}

.description-container em {
    font-size: 0.9rem;
    color: #9ca3af; /* gray-400 */
    font-style: normal;
}

.description-container strong {
    color: var(--text);
    font-weight: 600;
}

.navigation-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem; /* Increased padding */
    background-color: var(--nav-bg); /* Semi-transparent white */
    backdrop-filter: blur(10px); /* Frosted glass effect */
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.header-logo {
    height: 28px; /* Adjust height as needed */
    width: auto;
}

.progress-container {
    flex-grow: 1;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0 1rem;
    margin: 0 auto; /* Center the progress container */
    max-width: 600px; /* Max width for the progress bar area */
}

#progress-bar-background {
    flex-grow: 1;
    height: 12px;
    background-color: var(--border);
    border-radius: 6px;
    overflow: hidden;
}

#progress-bar-foreground {
    width: 0%; /* Initial width */
    height: 100%;
    background-color: var(--primary);
    border-radius: 6px;
    transition: width 0.5s ease-in-out; /* Animation */
}

#progress-text {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    min-width: 50px; /* Prevents layout shift */
    text-align: right;
}

.nav-buttons {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0; /* Prevent the button from shrinking */
}

.nav-buttons button {
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius);
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 0.5rem;
}

#submit-btn {
    background-color: #16a34a; /* green-600 */
}

#submit-btn:hover:not(:disabled) {
    background-color: #15803d; /* green-700 */
}

#submit-btn:disabled {
    background-color: var(--muted);
    cursor: not-allowed;
}

.nav-buttons button:hover {
    background: var(--primary-dark);
}

.nav-buttons button:disabled {
    background: var(--muted);
    cursor: not-allowed;
}

#theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

#theme-toggle-btn:hover {
    background: var(--border);
}

.sun-icon, .moon-icon {
    display: none;
}

[data-theme='light'] .sun-icon {
    display: block;
}

[data-theme='dark'] .moon-icon {
    display: block;
}

/* =============================
   Language Tabs
   ============================= */
.lang-tab {
  display: flex;
  flex-wrap: wrap; /* Allow items to wrap to the next line */
  align-items: center;
  gap: 0.5rem 1rem; /* Add row-gap for wrapped items */
  border-bottom: 1px solid var(--border);
  background: var(--white);
  padding: 0.75rem 1rem; /* Adjust padding slightly */
  box-shadow: var(--shadow);
  border-radius: var(--radius) var(--radius) 0 0;
}

.lang-tab .lang-tablinks {
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  color: var(--text);
  border-bottom: 3px solid transparent;
  transition: var(--transition);
}

.lang-tab .lang-tablinks:hover {
  background: rgba(37, 99, 235, 0.08); /* light primary tint */
}

.lang-tab .lang-tablinks.active {
  font-weight: 600;
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* Expand / Collapse Buttons */
.expand-collapse-buttons {
  margin-left: auto;
  display: flex;
  gap: 0.75rem;
}

.control-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  background: var(--primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}

.control-button:hover {
  background: var(--primary-dark);
}

/* =============================
   Category Tabs
   ============================= */
.category-tab {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
}

.category-tab button {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 0.5rem 0.875rem;
  font-size: 0.9375rem;
  color: var(--muted);
  cursor: pointer;
  transition: var(--transition);
}

.category-tab button:hover {
  background: rgba(107, 114, 128, 0.08); /* muted tint */
}

.category-tab button.active {
  background: var(--white);
  color: var(--primary);
  font-weight: 600;
  border-bottom-color: var(--white);
}

/* =============================
   Questions & Answers
   ============================= */
.question-block {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
  overflow: hidden;
  transition: var(--transition);
  display: none; /* Hide questions by default */
}

.question-block.active {
    display: block; /* Show active question */
}

.question-title {
  font-size: 1.25rem;
  color: var(--primary-dark);
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: default;
}

.question-title::after {
  content: "\25BC"; /* down chevron */
  font-size: 0.85rem;
  transition: transform var(--transition);
  display: none;
}

.question-block.active .question-title::after {
  transform: rotate(180deg);
}

.answers-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  padding: 1rem 1.25rem 1.5rem;
}


.answer-card {
  flex: 1 1 300px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem; /* Increased padding */
  box-shadow: var(--shadow);
  transition: all var(--transition); /* Use 'all' for transition */
  cursor: pointer; /* Add cursor pointer */
  position: relative;
}

.answer-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

/* Style for the selected answer card */
.answer-card.selected-vote {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary);
  transform: translateY(-1px);
}

.correct, .incorrect {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 1.2rem;
}

.correct { color: #16a34a; }  /* green‑600 */
.incorrect { color: #dc2626; } /* red‑600 */

.model-label {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 1rem;
}

.markdown-content {
  font-size: 1rem; /* Slightly increased font size from 0.95rem */
  line-height: 1.6; /* Increased line-height for better text flow */
  color: var(--text);
}

.markdown-content * {
  max-width: 100%;
}

/* Add vertical spacing for better rhythm */
.markdown-content p,
.markdown-content ul,
.markdown-content ol,
.markdown-content blockquote {
    margin-bottom: 1.2em;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5 {
    margin-top: 1.5em;
    margin-bottom: 0.75em;
    line-height: 1.3;
}

/* Remove margin from the last element to prevent extra space at the end */
.markdown-content > *:last-child {
    margin-bottom: 0;
}

/* Fix for list overflow */
.markdown-content ul,
.markdown-content ol {
  padding-left: 1.5em; /* Adjust left padding for lists */
}

.markdown-content li {
  word-wrap: break-word; /* Ensure long words in list items do not overflow */
  margin-bottom: 0.5em; /* Space out list items */
}

/* =============================
   Responsive
   ============================= */
@media (max-width: 900px) {
  .answers-container { flex-direction: column; }
  .answer-card { width: 100%; }
}

/* =============================
   Voting Section
   ============================= */
.vote-count {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--muted);
  margin-left: 0.5rem;
}

/* =============================
   Custom Dialog
   ============================= */
#custom-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 1;
    transition: opacity 0.3s ease;
}

#custom-dialog-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

#custom-dialog-box {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: 0 5px 25px rgba(0,0,0,0.15);
    width: 90%;
    max-width: 400px;
    text-align: center;
    transform: scale(1);
    transition: transform 0.3s ease;
}

#custom-dialog-overlay.hidden #custom-dialog-box {
    transform: scale(0.9);
}

#custom-dialog-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 1rem;
}

#custom-dialog-message {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--muted);
    margin-bottom: 1.5rem;
}

#custom-dialog-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

#custom-dialog-buttons button {
    border: none;
    border-radius: var(--radius);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-width: 100px;
}

#dialog-cancel-btn {
    background-color: var(--border);
    color: var(--muted);
}

#dialog-cancel-btn:hover {
    background-color: #e0e0e0; /* Slightly darker gray */
}

#dialog-confirm-btn {
    background-color: var(--primary);
    color: var(--white);
}

#dialog-confirm-btn:hover {
    background-color: var(--primary-dark);
}

/* =============================
   Submitted Page
   ============================= */
.submitted-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 80vh;
}

.submitted-container h1 {
    font-size: 2.5rem;
    color: var(--text);
    margin-bottom: 1rem;
}

.submitted-container p {
    font-size: 1.2rem;
    color: var(--muted);
}

/* =============================
   Question Transitions
   ============================= */
@keyframes fade-out {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.question-block.fade-out {
    animation: fade-out 0.25s ease-out forwards;
}

.question-block.fade-in {
    /* Needs to be active (display:block) to be visible */
    animation: fade-in 0.25s ease-in forwards;
}

/* = a태그 스타일 */
a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .header-logo {
        display: none;
    }
}