/* ============================================================
   CODEVERSE — STYLESHEET
   Tip: CSS is read top to bottom. Variables at the top
   control colors so you can rebrand in one place.
============================================================ */

/* --- 1. DESIGN TOKENS (your color palette & fonts) --- */
:root {
  --black:    #0a0a0a;   /* near-black background */
  --dark:     #111111;   /* slightly lighter dark */
  --surface:  #1a1a1a;   /* cards and panels */
  --border:   #2a2a2a;   /* subtle borders */
  --white:    #f5f5f0;   /* off-white text */
  --muted:    #888888;   /* secondary text */
  --accent:   #b8ff57;   /* lime green — the "CodeVerse color" */
  --accent2:  #57d4ff;   /* light blue accent */

  --font-display: 'DM Mono', monospace;  /* headings — code-y feel */
  --font-body:    'DM Sans', sans-serif; /* body text — readable */

  --radius: 12px;       /* how rounded corners are */
  --max-w:  1100px;     /* max content width */
}

/* --- 2. RESET — Removes browser default weirdness --- */
*, *::before, *::after {
  box-sizing: border-box; /* padding doesn't break layout */
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth; /* smooth scrolling when clicking nav links */
}

body {
  background-color: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden; /* no horizontal scroll */
}

img { max-width: 100%; display: block; }
a  { text-decoration: none; color: inherit; }

/* --- 3. REUSABLE HELPERS --- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-dark {
  background-color: var(--dark);
}

/* Small label above section titles, like "// About Us" */
.section-label {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 20px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 46px); /* clamp = responsive font size */
  font-weight: 500;
  line-height: 1.2;
  margin-bottom: 56px;
}

/* --- 4. BUTTONS --- */
.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

/* The main green button */
.btn-primary {
  background: var(--accent);
  color: var(--black);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(184, 255, 87, 0.3);
}

/* Ghost button — transparent with white border */
.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--white);
}

/* Outline button (used in event cards) */
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 10px 20px;
  white-space: nowrap;
}
.btn-outline:hover {
  background: var(--accent);
  color: var(--black);
}

/* Full-width button (used in form) */
.btn-full { width: 100%; text-align: center; }

/* --- 5. NAVBAR --- */
.navbar {
  position: fixed; /* stays at top when you scroll */
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 40px;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px); /* frosted glass effect */
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

/* JS adds this class when you scroll down */
.navbar.scrolled {
  border-bottom-color: var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
}
.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-size: 14px;
  color: var(--muted);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--white); }

/* The "Join Us" button in the nav */
.nav-cta {
  background: var(--accent) !important;
  color: var(--black) !important;
  padding: 10px 20px;
  border-radius: 8px;
  font-family: var(--font-display);
  font-size: 13px !important;
}

/* Hamburger button — hidden on desktop, shown on mobile */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: all 0.3s;
}

/* --- 6. HERO SECTION --- */
.hero {
  min-height: 100vh; /* fills the whole screen */
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 40px 80px;
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 99px;
  margin-bottom: 40px;
  width: fit-content;
  animation: fadeUp 0.6s ease both;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 88px);
  font-weight: 500;
  line-height: 1.1;
  margin-bottom: 28px;
  animation: fadeUp 0.6s 0.1s ease both;
}

.accent { color: var(--accent); }

.hero-sub {
  max-width: 500px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
  margin-bottom: 44px;
  animation: fadeUp 0.6s 0.2s ease both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeUp 0.6s 0.3s ease both;
}

/* Floating code lines in the background */
.hero-bg-code {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 20px;
  opacity: 0.07; /* very faint */
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--accent);
  pointer-events: none; /* can't click on it */
  text-align: right;
  padding-right: 40px;
}

/* --- 7. ABOUT CARDS --- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* responsive columns */
  gap: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.card-icon {
  font-size: 32px;
  margin-bottom: 20px;
}

.card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 12px;
}

.card p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

/* --- 8. EVENTS --- */
.events-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.event-card {
  display: flex;
  align-items: center;
  gap: 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  transition: border-color 0.2s;
}
.event-card:hover { border-color: var(--accent2); }

.event-date {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 56px;
  font-family: var(--font-display);
}
.date-num {
  font-size: 32px;
  font-weight: 500;
  color: var(--accent2);
  line-height: 1;
}
.date-mon {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.1em;
}

.event-info { flex: 1; }

.event-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 3px 10px;
  border-radius: 99px;
  margin-bottom: 10px;
}

.event-info h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 8px;
}
.event-info p { color: var(--muted); font-size: 14px; }

/* --- 9. PROJECTS --- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden; /* clips the preview image */
  transition: transform 0.2s, border-color 0.2s;
}
.project-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
}

.project-preview {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.project-emoji { font-size: 48px; }

.project-body { padding: 24px; }
.project-body h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  margin-bottom: 10px;
}
.project-body p { color: var(--muted); font-size: 14px; margin-bottom: 16px; }

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.project-tags span {
  font-family: var(--font-display);
  font-size: 11px;
  background: var(--border);
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 6px;
}

/* --- 10. RESOURCES --- */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
}

.resource-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.2s;
}
.resource-item:hover {
  border-color: var(--accent2);
  transform: translateX(4px);
}

.resource-icon { font-size: 28px; flex-shrink: 0; }

.resource-item h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 4px;
}
.resource-item p { color: var(--muted); font-size: 13px; }

.resource-arrow {
  margin-left: auto;
  font-size: 20px;
  color: var(--muted);
  flex-shrink: 0;
}
.resource-item:hover .resource-arrow { color: var(--accent2); }

/* --- 11. CONTACT / FORM --- */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 60px;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--muted);
}

/* Shared styles for input, select, textarea */
.form-group input,
.form-group select,
.form-group textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 15px;
  padding: 14px 16px;
  transition: border-color 0.2s;
  outline: none;
  resize: vertical; /* only textarea can resize vertically */
}

.form-group select option { background: var(--surface); }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-success {
  display: none; /* hidden until JS shows it */
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 14px;
  text-align: center;
  padding: 16px;
  border: 1px solid var(--accent);
  border-radius: 8px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-top: 10px;
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  font-size: 24px;
}
.contact-detail > div strong {
  display: block;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 4px;
}
.contact-detail p { color: var(--muted); font-size: 14px; }

.social-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.social-btn {
  font-family: var(--font-display);
  font-size: 13px;
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: 8px;
  transition: all 0.2s;
}
.social-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* --- 12. FOOTER --- */
.footer {
  text-align: center;
  padding: 48px 24px;
  border-top: 1px solid var(--border);
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--muted);
}
.footer-sub {
  font-size: 12px;
  margin-top: 8px;
  opacity: 0.6;
}

/* --- 13. ANIMATIONS --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Animate sections into view when they appear on screen */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- 14. RESPONSIVE (Mobile-friendly) --- */
/* Tablet: 768px and below */
@media (max-width: 768px) {

  /* Show hamburger, hide nav links by default */
  .hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--black);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; } /* JS toggles this */

  .navbar { padding: 16px 24px; }

  .hero {
    padding: 100px 24px 60px;
    text-align: center;
    align-items: center;
  }
  .hero-badge { align-self: center; }
  .hero-sub { text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-bg-code { display: none; } /* hide decorative code on mobile */

  .event-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

  /* Contact form goes full width on mobile */
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
}

/* Small phones */
@media (max-width: 480px) {
  .section { padding: 70px 0; }
  .section-title { margin-bottom: 36px; }
}