/* =====================
   THEME VARIABLES
===================== */
:root {
  --bg-color: #f5f7fb;
  --text-color: #1a1a1a;
  --link-color: #1a73e8;

  --sidebar-bg: linear-gradient(180deg, #5f6ad4, #7f8cff);
  --sidebar-text: #ffffff;
  --sidebar-link: #e0e7ff;

  --card-bg: #ffffff;
}

/* DARK MODE */
body.dark-mode {
  --bg-color: #0f1117;
  --text-color: #e6e6e6;
  --link-color: #8ab4f8;

  --sidebar-bg: linear-gradient(180deg, #1f1f1f, #2c2c2c);
  --sidebar-text: #ffffff;
  --sidebar-link: #b0b0b0;

  --card-bg: #1a1d24;
}

/* =====================
   GLOBAL
===================== */
body {
  display: flex;
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
}

a {
  color: var(--link-color);
  text-decoration: none;
}

/* =====================
   LAYOUT WRAPPER
===================== */
.layout {
  display: flex;
  min-height: 100vh;
  width: 100%;
}

/* =====================
   SIDEBAR
===================== */
.sidebar {
  width: 260px;
  min-width: 260px;
  height: 100vh;
  position: sticky;
  top: 0;

  overflow-y: auto;
  padding: 60px 20px 20px;

  background: var(--sidebar-bg);
  color: var(--sidebar-text);

  transition: transform 0.3s ease, width 0.3s ease, min-width 0.3s ease;
  z-index: 100;
}

/* collapsed desktop */
.sidebar.closed {
  transform: translateX(-100%);
  width: 0;
  min-width: 0;
  padding: 0;
  overflow: hidden;
}

/* links */
.sidebar a {
  display: block;
  color: var(--sidebar-link);
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 6px;
  transition: 0.2s ease;
}

.sidebar a:hover {
  background: rgba(255,255,255,0.15);
  transform: translateX(4px);
}

/* course accordion */
.course-header {
  font-weight: 600;
  margin-top: 15px;
  cursor: pointer;

  display: flex;
  justify-content: space-between;
  align-items: center;
}

.arrow {
  font-size: 12px;
  opacity: 0.8;
  transition: transform 0.3s ease;
}

.course-header.active .arrow {
  transform: rotate(90deg);
}

.course-content {
  height: 0;
  overflow: hidden;
  transition: height 0.3s ease;
}

/* =====================
   CONTENT AREA
===================== */
.content {
  flex: 1;
  padding: 40px;
  max-width: 900px;

  margin: 20px auto;
  background: var(--card-bg);

  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);

  min-width: 0;
  transition: all 0.3s ease;
}

/* typography */
.content h1 { font-size: 32px; margin-bottom: 10px; }
.content h2 { font-size: 22px; margin-top: 30px; }
.content p  { margin: 10px 0; }
.content ul { padding-left: 20px; }
.content li { margin-bottom: 6px; }

/* =====================
   CODE BLOCKS
===================== */
pre {
  background: #f6f8fa;
  color: #24292e;
  padding: 16px;
  border-radius: 12px;
  overflow-x: auto;
  border: 1px solid #e1e4e8;
}

body.dark-mode pre {
  background: #161b22;
  color: #c9d1d9;
  border: 1px solid #30363d;
}

code {
  background: rgba(0,0,0,0.06);
  padding: 3px 6px;
  border-radius: 6px;
}

body.dark-mode code {
  background: rgba(255,255,255,0.08);
}

/* =====================
   LESSON UI
===================== */
.lesson-header h1 { margin-bottom: 5px; }

.lesson-meta {
  font-size: 14px;
  opacity: 0.7;
}

.lesson-section {
  margin-top: 30px;
  background: var(--card-bg);
  padding: 18px;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}

.lesson-section + .lesson-section {
  margin-top: 20px;
}

.lesson-section h3 a {
  font-size: 18px;
  font-weight: 600;
}

/* notes */
.note-box {
  margin-top: 20px;
  padding: 15px;
  border-left: 5px solid #4caf50;
  background: rgba(76,175,80,0.1);
  border-radius: 8px;
}

.warning-box {
  margin-top: 20px;
  padding: 15px;
  border-left: 5px solid #ff9800;
  background: rgba(255,152,0,0.1);
  border-radius: 8px;
}

/* =====================
   NAVIGATION
===================== */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;

  margin-top: 50px;
  padding: 16px;

  background: var(--card-bg);
  border-radius: 14px;
  border: 1px solid rgba(0,0,0,0.06);

  box-shadow: 0 8px 25px rgba(0,0,0,0.08);

  position: sticky;
  bottom: 10px;
}

.lesson-nav a {
  padding: 10px 18px;
  border-radius: 10px;

  background: var(--link-color);
  color: white;

  font-size: 14px;
  font-weight: 500;

  transition: 0.25s ease;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.lesson-nav a:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

/* =====================
   TABS WRAPPER
===================== */
.tabs {
  display: flex;
  gap: 10px;
  margin: 20px 0;
  padding: 6px;

  background: var(--card-bg);
  border-radius: 12px;

  box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}

/* =====================
   TAB BUTTONS
===================== */
.tab-btn {
  padding: 10px 16px;
  border: none;
  border-radius: 10px;

  cursor: pointer;
  font-size: 14px;
  font-weight: 500;

  background: transparent;
  color: var(--text-color);

  transition: all 0.2s ease;
}

.tab-btn:hover {
  background: rgba(120,110,245,0.12);
}

/* ACTIVE TAB */
.tab-btn.active {
  background: rgba(120,110,245,0.9);
  color: white;
  box-shadow: 0 4px 12px rgba(120,110,245,0.25);
}

/* =====================
   TAB CONTENT FIX
===================== */
.tab-content {
  display: none;
  animation: fadeIn 0.25s ease;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}
/* =====================
   BUTTONS
===================== */

#theme-toggle,
#sidebar-toggle {
  position: fixed;
  top: 15px;

  padding: 8px 14px;
  border: none;
  border-radius: 10px;

  cursor: pointer;
  background: #fff;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

#theme-toggle { right: 20px; }
#sidebar-toggle { left: 20px; z-index: 1000; }

body.dark-mode #theme-toggle,
body.dark-mode #sidebar-toggle {
  background: #2a2a2a;
  color: white;
}

/* =====================
   BACKDROP
===================== */
#sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 99;
}

#sidebar-backdrop.visible {
  display: block;
}

/* =====================
   MOBILE
===================== */
@media (max-width: 768px) {

  .layout { flex-direction: column; }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;

    width: 260px;
    height: 100vh;

    transform: translateX(-100%);
    box-shadow: 4px 0 20px rgba(0,0,0,0.3);
    z-index: 200;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .content {
    margin: 12px;
    padding: 20px;
  }

  #theme-toggle { top: 12px; right: 12px; }
  #sidebar-toggle { top: 12px; left: 12px; }
}
/* =====================
   TABLET  (769px – 1024px)
===================== */
@media (min-width: 769px) and (max-width: 1024px) {
  .sidebar {
    width: 220px;
    min-width: 220px;
    padding: 60px 14px 20px;
  }

  .content {
    padding: 28px;
    margin: 16px;
  }
}
/* =====================
   TABLE CLASS (THEMED FIX)
===================== */

/* =====================
   TABLE CONTAINER
===================== */
table {
  margin: 24px auto;
  width: 90%;
  max-width: 900px;

  background: var(--card-bg);
  border-radius: 14px;
  overflow: hidden;

  border-collapse: separate;
  border-spacing: 0;

  box-shadow: 0 10px 30px rgba(0,0,0,0.10);
  font-size: 14px;
}

/* =====================
   HEADER (TH)
===================== */
th {
  padding: 14px 10px;
  text-align: center;

  background: rgba(120, 110, 245, 0.5);
  color: var(--text-color);

  font-weight: 600;
  letter-spacing: 0.3px;

  border-bottom: 1px solid rgba(0,0,0,0.08);
}

/* dark mode header tweak */
body.dark-mode th {
  background: rgba(120, 110, 245, 0.8);
  border-bottom: 2px solid rgba(255,255,255,0.1);
}

/* =====================
   CELLS (TD)
===================== */
td {
  padding: 14px 10px;
  text-align: center;

  border-bottom: 1px solid rgba(0,0,0,0.06);
  color: var(--text-color);
}

/* last row cleanup */
tr:last-child td {
  border-bottom: none;
}

/* =====================
   ROW INTERACTIONS
===================== */

/* hover effect */
tr:hover {
  background: rgba(120, 110, 245, 0.06);
  transition: 0.2s ease;
}

/* striping */
tr:nth-child(even) {
  background: rgba(0,0,0,0.03);
}

/* dark mode striping */
body.dark-mode tr:nth-child(even) {
  background: rgba(255,255,255,0.04);
}

/* =====================
   CHECKBOX STYLING
===================== */
input[type="checkbox"] {
  width: 16px;
  height: 16px;
  transform: scale(1.1);
  cursor: pointer;
  accent-color: #7b6ef6;
}

/* =====================
   TASK COLUMN
===================== */
.task {
  text-align: left;
  font-weight: 500;
  padding-left: 14px;
}


.lp-container * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.lp-container {
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(120deg, #eef2f7, #d9e4f5);
    color: #333;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Header */
.lp-header {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, #4CAF50, #1b5e20);
    color: white;
    animation: lp-fadeIn 1.5s ease;
}

.lp-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.lp-header h2 {
    margin-top: 15px;
    font-weight: 400;
}

/* Section */
.lp-section {
    max-width: 1000px;
    margin: auto;
    padding: 40px 20px;
}

/* Cards */
.lp-card {
    background: white;
    border-radius: 16px;
    padding: 25px;
    margin: 25px 0;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    transform: translateY(40px);
    opacity: 0;
    animation: lp-slideUp 1s forwards;
}

.lp-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
}

.lp-card h2 {
    color: #2e7d32;
    margin-bottom: 10px;
}

.lp-card h3 {
    margin-top: 20px;
}

/* Images */
.lp-img {
    width: 100%;
    border-radius: 12px;
    margin-top: 15px;
    transition: transform 0.5s ease, filter 0.5s ease;
}

.lp-img:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

/* Warning */
.lp-warning {
    background: linear-gradient(135deg, #ffdddd, #ffeaea);
    border-left: 6px solid red;
    padding: 20px;
    border-radius: 10px;
    margin: 30px 0;
    animation: lp-pulse 2s infinite;
}

/* Floating bubbles */
.lp-bubble {
    position: fixed;
    bottom: -100px;
    width: 40px;
    height: 40px;
    background: rgba(76, 175, 80, 0.2);
    border-radius: 50%;
    animation: lp-floatUp 10s linear infinite;
}

.lp-bubble:nth-child(1) { left: 10%; animation-duration: 8s; }
.lp-bubble:nth-child(2) { left: 30%; animation-duration: 12s; }
.lp-bubble:nth-child(3) { left: 60%; animation-duration: 10s; }
.lp-bubble:nth-child(4) { left: 80%; animation-duration: 14s; }

/* Animations */
@keyframes lp-fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; }
}

@keyframes lp-slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes lp-pulse {
    0%,100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

@keyframes lp-floatUp {
    0% {
        transform: translateY(0) scale(1);
        opacity: 0.5;
    }
    100% {
        transform: translateY(-120vh) scale(1.5);
        opacity: 0;
    }
}


/* =====================
   LIFE PAGE (LP) DARK
===================== */
body.dark-mode .lp-container {
  background: linear-gradient(120deg, #0f172a, #09111d);
  color: #e6e6e6;
}

body.dark-mode .lp-card {
  background: #1f1f1f;
  box-shadow: 0 10px 25px rgba(0,0,0,0.6);
}

body.dark-mode .lp-card h2 {
  color: #6ee7b7; /* softer green */
}

body.dark-mode .lp-card p {
  color: #cfcfcf;
}

/* warning box */
body.dark-mode .lp-warning {
  background: linear-gradient(135deg, #3b1f1f, #2a1616);
  border-left: 6px solid #ff4d4d;
  color: #f5c2c2;
}

/* bubbles softer in dark */
body.dark-mode .lp-bubble {
  background: rgba(229, 245, 230, 0.2);
}




.lp-container {
  max-width: 1200px;
  margin: auto;
  padding: 40px 20px;
  position: relative;
  overflow: hidden;
}

.lp-header {
  text-align: center;
  margin-bottom: 50px;
}

.lp-header h1 {
  font-size: 3rem;
  margin-bottom: 12px;
  color: #38bdf8;
}

.lp-header p {
  font-size: 1.2rem;
  opacity: 0.85;
}

.lp-header h3 {
  font-size: 1.4rem;
  margin-top: 15px;
  color: #f8fafc;
}

.lp-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.lp-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 20px;
  padding: 25px;
  backdrop-filter: blur(12px);
  transition: all 0.3s ease;
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.lp-card:hover {
  transform: translateY(-8px);
}

.lp-card h2 {
  margin-top: 0;
  color: #7d85fc;
}

.lp-card p {
  line-height: 1.6;
  opacity: 0.92;
}

.lp-warning {
  grid-column: 1 / -1;
  padding: 20px;
  border-radius: 16px;
  background: rgba(239, 68, 68, 0.15);
  border-left: 5px solid #ef4444;
  font-size: 1.1rem;
  line-height: 1.6;
}

.lp-bubble {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  animation: float 8s infinite ease-in-out;
}

.lp-bubble:nth-child(1) {
  width: 120px;
  height: 120px;
  top: 10%;
  left: 5%;
}

.lp-bubble:nth-child(2) {
  width: 90px;
  height: 90px;
  top: 65%;
  right: 8%;
}

.lp-bubble:nth-child(3) {
  width: 140px;
  height: 140px;
  bottom: 10%;
  left: 18%;
}

.lp-bubble:nth-child(4) {
  width: 100px;
  height: 100px;
  top: 25%;
  right: 25%;
}

@keyframes float {
  0%, 100% {
      transform: translateY(0px);
  }
  50% {
      transform: translateY(-20px);
  }
}