/* ==== RESET & BASE ==== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

:root[data-theme='light'] {
  --bg: #f5f7fa;
  --text: #1e1e1e;
  --primary: #4a90e2;
  --secondary: #ffffff;
  --accent: #e0e0e0;
  --button: #4a90e2;
  --button-text: #fff;
  --hover: #357ab8;
}

:root[data-theme='dim'] {
  --bg: #eaeaea;
  --text: #1f1f1f;
  --primary: #607d8b;
  --secondary: #f0f0f0;
  --accent: #c1c1c1;
  --button: #607d8b;
  --button-text: #fff;
  --hover: #455a64;
}

:root[data-theme='dark'] {
  --bg: #1e1e2f;
  --text: #f0f0f0;
  --primary: #90caf9;
  --secondary: #2a2a3a;
  --accent: #3a3a4f;
  --button: #90caf9;
  --button-text: #000;
  --hover: #64b5f6;
}

/* ==== HEADER ==== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--primary);
  color: var(--button-text);
  padding: 0.8rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.logo {
  font-weight: 600;
  font-size: 1.25rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#theme-toggle, .nav-btn, #hamburger {
  background: var(--button);
  color: var(--button-text);
  border: none;
  padding: 0.5em 0.9em;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

#theme-toggle:hover, .nav-btn:hover, #hamburger:hover {
  background: var(--hover);
}

/* ==== LAYOUT ==== */
.container {
  display: flex;
  flex: 1;
  min-height: 100%;
}

.sidebar {
  width: 260px;
  background-color: var(--secondary);
  padding: 1rem;
  border-right: 1px solid var(--accent);
  transition: transform 0.3s ease;
}

.sidebar h2 {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.topic {
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 1rem;
}

.topic:hover {
  color: var(--primary);
}

.difficulty-dropdown {
  margin-top: 0.5em;
  padding-left: 0.5em;
  display: none;
  flex-direction: column;
  gap: 6px;
}

.topic.active .difficulty-dropdown {
  display: flex;
}

.difficulty-dropdown button {
  background-color: var(--accent);
  border: none;
  border-radius: 4px;
  padding: 0.4em;
  cursor: pointer;
  transition: background 0.2s;
}

.difficulty-dropdown button:hover {
  background-color: var(--hover);
  color: var(--button-text);
}

/* ==== MAIN CONTENT ==== */
main {
  flex-grow: 1;
  padding: 2rem;
  overflow-y: auto;
}

.welcome-text {
  font-size: 2rem;
  text-align: center;
  color: var(--primary);
  animation: fadeIn 0.6s ease-in-out;
}

.question-box {
  background-color: var(--secondary);
  padding: 1.2em;
  margin-bottom: 1.5em;
  border-left: 5px solid var(--primary);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
  animation: fadeInUp 0.4s ease-in-out;
}

.question-box h3 {
  margin-bottom: 0.5rem;
}

.question-box pre {
  background: var(--accent);
  padding: 0.8em;
  border-radius: 5px;
  overflow-x: auto;
}
/* 
.view-btn {
  background: var(--button);
  color: var(--button-text);
  padding: 0.5em 1em;
  border: none;
  border-radius: 6px;
  margin-top: 1em;
  cursor: pointer;
  transition: background 0.2s;
}

.view-btn:hover {
  background: var(--hover);
}

.answer {
  margin-top: 1em;
  display: none;
} */


.ask-ai-btn {
  background: var(--button);
  color: var(--button-text);
  padding: 0.5em 1em;
  border: none;
  border-radius: 6px;
  margin-top: 1em;
  cursor: pointer;
  transition: background 0.2s;
}

.ask-ai-btn:hover {
  background: var(--hover);
}
/* ==== DASHBOARD STYLES ==== */
.dashboard {
  background-color: var(--secondary);
  border-radius: 12px;
  padding: 2.5rem 3rem;
  max-width: 900px;
  margin: 0 auto;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1.6;
  animation: fadeIn 0.7s ease forwards;
}

.dashboard h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.dashboard h2 {
  font-size: 1.8rem;
  margin-top: 1.8rem;
  margin-bottom: 0.8rem;
  color: var(--primary);
}

.dashboard ul {
  margin-left: 1.5rem;
  list-style-type: disc;
  margin-bottom: 1.2rem;
}

.dashboard blockquote {
  background-color: var(--accent);
  padding: 1rem 1.2rem;
  border-left: 6px solid var(--primary);
  font-style: italic;
  margin: 1.2rem 0;
  color: var(--primary);
}

.dashboard-footer {
  margin-top: 3rem;
  border-top: 1px solid var(--accent);
  padding-top: 1.5rem;
  font-size: 0.95rem;
  color: var(--text);
}

.dashboard-footer .resource-links {
  display: flex;
  flex-wrap: wrap;             /* allow wrapping */
  gap: 1rem;
  padding-left: 1.2rem;
  margin-bottom: 1rem;
  list-style: none;
}

.dashboard-footer .resource-links li {
  margin-bottom: 0.5rem;
  min-width: 150px;           /* optional for layout balance */
}


.dashboard-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.dashboard-footer a:hover {
  color: var(--hover);
  text-decoration: underline;
}

.dashboard-footer p {
  margin-bottom: 1rem;
}

.final-note {
  margin-top: 1.5rem;
  font-style: italic;
  color: var(--primary);
  font-weight: 600;
  text-align: center;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ==== FOOTER ==== */
.site-footer {
  background: var(--primary);
  color: var(--button-text);
  text-align: center;
  padding: 1em 1rem;
  font-size: 0.9rem;
  box-shadow: 0 -3px 6px rgba(0,0,0,0.15);
  user-select: none;
}


/* ==== FOOTER ==== */
/* footer {
  background: var(--primary);
  color: var(--button-text);
  text-align: center;
  padding: 1em;
  font-size: 0.9rem;
} */

/* ==== ANIMATIONS ==== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

/* ==== RESPONSIVE ==== */
#hamburger {
  display: none;
}

@media (max-width: 900px) {
  .container {
    flex-direction: column;
  }

  .sidebar {
    position: absolute;
    left: 0;
    top: 60px;
    width: 100%;
    transform: translateY(-100%);
    z-index: 999;
    background: var(--secondary);
    
  }
  
  .sidebar.open {
    transform: translateY(0);
  }
  
  #hamburger {
    display: inline-block;
  }
}

.dashboard-footer .resource-links {
  flex-direction: column;
  padding-left: 0;
  align-items: flex-start;
}

.dashboard-footer .resource-links li {
  width: 100%;
}