/* ========================================
   Codeilium - White Theme Styles
   ======================================== */

/* CSS Variables */
:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-bg-dark: #1a1a1a;
  --color-text: #1a1a1a;
  --color-text-secondary: #6b7280;
  --color-text-light: #9ca3af;
  --color-accent: #000000;
  --color-accent-light: #333333;
  --color-border: #e5e7eb;
  --color-border-dark: #d1d5db;
  
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-normal);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
nav img {
  width: 300px;
}
.logo-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-accent);
  background: var(--color-bg);
}

/* REPLACE THIS WITH YOUR LOGO IMAGE:
.logo-placeholder {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: url('your-logo.png') center/cover no-repeat;
  border: none;
}
*/

.logo-text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a:not(.btn-primary) {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
  position: relative;
}

.nav-links a:not(.btn-primary)::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition-fast);
}

.nav-links a:not(.btn-primary):hover {
  color: var(--color-text);
}

.nav-links a:not(.btn-primary):hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition-fast);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 2rem;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 999;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  font-size: 1.1rem;
  color: var(--color-text);
  padding: 0.5rem 0;
}

/* ========================================
   Buttons
   ======================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: 50px;
  transition: var(--transition-fast);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-primary svg {
  width: 16px;
  height: 16px;
}

.btn-large {
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn-large svg {
  width: 18px;
  height: 18px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: transparent;
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: 50px;
  border: 1px solid var(--color-border-dark);
  transition: var(--transition-fast);
  cursor: pointer;
}

.btn-secondary:hover {
  background: var(--color-bg-alt);
  border-color: var(--color-text);
}

.link-underline {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  position: relative;
  transition: var(--transition-fast);
}

.link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-text);
  transition: var(--transition-fast);
}

.link-underline:hover {
  color: var(--color-text);
}

.link-underline:hover::after {
  width: 100%;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem 4rem;
  background: var(--color-bg);
  position: relative;
}

.hero-content {
  max-width: 800px;
}

.micro-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 12vw, 8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  font-weight: 400;
}

.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-light);
  font-size: 0.8rem;
  animation: bounce 2s infinite;
}

.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--color-text-light);
  border-bottom: 2px solid var(--color-text-light);
  transform: rotate(45deg);
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========================================
   Feature Sections (CodeWars, LeetCode)
   ======================================== */
.feature-section {
  padding: 6rem 2rem;
  background: var(--color-bg);
}

.feature-alt {
  background: var(--color-bg-alt);
}

.feature-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.feature-text {
  padding-right: 2rem;
}

.feature-text-right {
  padding-right: 0;
  padding-left: 2rem;
  text-align: right;
}

.feature-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 0.95;
  color: var(--color-text);
  margin-bottom: 1.5rem;
}

.feature-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 450px;
  margin-bottom: 2rem;
}

.feature-text-right .feature-desc {
  margin-left: auto;
}

.feature-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.feature-text-right .feature-actions {
  justify-content: flex-end;
}

/* Code Block */
.code-block {
  background: var(--color-bg-dark);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.filename {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

.code-content {
  padding: 1.25rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: #e5e7eb;
  overflow-x: auto;
}

.code-content .keyword { color: #c678dd; }
.code-content .function { color: #61afef; }
.code-content .number { color: #d19a66; }
.code-content .comment { color: #5c6370; font-style: italic; }

/* Algorithm Visual */
.algo-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2rem;
}

.algo-step {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: 12px;
  min-width: 180px;
  transition: var(--transition-normal);
}

.algo-step.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.step-num {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-border);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
}

.algo-step.active .step-num {
  background: rgba(255, 255, 255, 0.2);
}

.step-text {
  font-weight: 500;
}

.algo-arrow {
  font-size: 1.25rem;
  color: var(--color-text-light);
}

@media (max-width: 1024px) {
    .feature-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .feature-text,
    .feature-text-right {
        padding: 0;
        text-align: left;
    }

    .feature-text-right .feature-actions {
        justify-content: flex-start;
    }

    .feature-visual-left {
        order: 2;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

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

    .menu-toggle {
        display: flex;
    }

    .hero {
        padding: 7rem 1.5rem 3rem;
    }

    .feature-section,
    .about-section,
    .subscribe-section,
    .videos-section,
    .topics-section {
        padding: 4rem 1.5rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .about-stats {
        gap: 2rem;
    }

    .subscribe-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn-large {
        width: 100%;
        justify-content: center;
    }

    /* Code block responsive fix */
    .code-content {
        font-size: 0.75rem;
        padding: 1rem;
    }

    .algo-visual {
        padding: 1rem;
    }

    .algo-step {
        min-width: 140px;
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 1rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .feature-title {
        font-size: 2rem;
    }

    .videos-grid {
        grid-template-columns: 1fr;
    }

    .topics-grid {
        grid-template-columns: 1fr;
    }

    /* Extra small screen code block fix */
    .code-content {
        font-size: 0.7rem;
        padding: 0.75rem;
    }

    .feature-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-primary,
    .btn-secondary {
        justify-content: center;
    }
}

/* ========================================
   About Section
   ======================================== */
.about-section {
  padding: 8rem 2rem;
  background: var(--color-bg);
  text-align: center;
}

.about-content {
  max-width: 800px;
  margin: 0 auto 4rem;
}

.about-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 1.5rem;
}

.about-title span {
  display: block;
}

.about-title .highlight {
  color: var(--color-accent);
}

.about-desc {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 500px;
  margin: 0 auto 2rem;
}

.about-stats {
  display: flex;
  justify-content: center;
  gap: 4rem;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
}

/* ========================================
   Subscribe Section
   ======================================== */
.subscribe-section {
  padding: 8rem 2rem;
  background: var(--color-bg-alt);
  text-align: center;
}

.subscribe-content {
  max-width: 700px;
  margin: 0 auto;
}

.subscribe-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.subscribe-title span {
  display: block;
}

.subscribe-title .highlight {
  color: var(--color-accent);
}

.subscribe-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: 2rem;
}

.subscribe-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ========================================
   Videos Section
   ======================================== */
.videos-section {
  padding: 6rem 2rem;
  background: var(--color-bg);
}

.section-header {
  max-width: 1400px;
  margin: 0 auto 2.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  color: var(--color-text);
}

.filter-buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 0.5rem 1rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 50px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.filter-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.videos-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.video-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-normal);
}

.video-card:hover {
  border-color: var(--color-border-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.video-thumbnail {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}
a.video-card:nth-of-type(1) .video-thumbnail
 {
    background-image: url(images/game2.png);
    background-size: contain;
 }
a.video-card:nth-of-type(2) .video-thumbnail
 {
    background-image: url(images/leetcode.png);
    background-size: contain;
 }
a.video-card:nth-of-type(3) .video-thumbnail
 {
    background-image: url(images/building.png);
    background-size: contain;
 }
.
.video-play {
  width: 50px;
  height: 50px;
  background: var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition-normal);
}

.video-card:hover .video-play {
  opacity: 1;
  transform: scale(1);
}

.video-duration {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  padding: 0.25rem 0.5rem;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  border-radius: 4px;
}

.video-info {
  padding: 1.25rem;
}

.video-category {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
}

.video-title {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 0.5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* ========================================
   Topics Section
   ======================================== */
.topics-section {
  padding: 6rem 2rem;
  background: var(--color-bg-alt);
}

.topics-section .section-title {
  max-width: 1400px;
  margin: 0 auto 2.5rem;
}

.topics-grid {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.topic-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 2rem;
  transition: var(--transition-normal);
}

.topic-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-6px);
}

.topic-icon {
  width: 56px;
  height: 56px;
  background: var(--color-bg-alt);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin: 0 auto  1.25rem;
}

.topic-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.topic-desc {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.topic-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-accent);
  transition: var(--transition-fast);
}

.topic-link svg {
  transition: var(--transition-fast);
}

.topic-card:hover .topic-link svg {
  transform: translateX(4px);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  padding: 4rem 2rem 2rem;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-brand {
  max-width: 400px;
}

.footer-brand .logo-placeholder {
  margin-bottom: 1.5rem;
  width: 100%;
}
.footer-brand .logo-placeholder img 
{
  width: 100%;
}
.footer-title {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.footer-desc {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  transition: var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-text);
}

.footer-link svg {
  width: 18px;
  height: 18px;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 1024px) {
  .feature-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .feature-text,
  .feature-text-right {
    padding: 0;
    text-align: left;
  }
  
  .feature-text-right .feature-actions {
    justify-content: flex-start;
  }
  
  .feature-visual-left {
    order: 2;
  }
  
  .footer-main {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero {
    padding: 7rem 1.5rem 3rem;
  }
  
  .feature-section,
  .about-section,
  .subscribe-section,
  .videos-section,
  .topics-section {
    padding: 4rem 0.4rem;
  }
  
  .section-header {
    flex-direction: column;
    align-items: center;
  }
  
  .about-stats {
    gap: 2rem;
  }
  
  .subscribe-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .btn-large {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 1rem;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .feature-title {
    font-size: 2.5rem;
  }
  
  .videos-grid {
    grid-template-columns: 1fr;
  }
  
  .topics-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   Animations
   ======================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}