/* === General Styles === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  background-color: #0b0c10;
  color: #c5c6c7;
  line-height: 1.6;
  scroll-behavior: smooth;
}

/* === Navbar === */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 6%;
  background: rgba(20, 20, 20, 0.95);
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  border-bottom: 1px solid #1f2833;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.logo {
  font-size: 1.4rem;
  color: #66fcf1;
  font-weight: 700;
}

.logo span {
  color: #45a29e;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.4rem;
  align-items: center;
  flex-wrap: wrap; /* allows wrapping on small screens */
}

.nav-links a {
  color: #c5c6c7;
  text-decoration: none;
  transition: color 0.25s ease;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a:focus {
  color: #66fcf1;
  outline: none;
}

/* === Hero Section === */
.hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 5rem 6%;
  background: linear-gradient(180deg, #0b0c10, #1f2833);
}

.hero h1 {
  font-size: 2.6rem;
  color: #ffffff;
  margin-bottom: 1rem;
}

.hero p {
  max-width: 700px;
  font-size: 1.05rem;
  color: #c5c6c7;
  margin: 0.5rem 0 1rem;
}

.btn {
  display: inline-block;
  margin-top: 1rem;
  background-color: #45a29e;
  color: #0b0c10;
  padding: 0.7rem 1.2rem;
  border-radius: 30px;
  text-decoration: none;
  transition: all 0.25s ease;
  font-weight: 600;
}

.btn:hover {
  background-color: #66fcf1;
  transform: translateY(-3px);
}

/* Secondary button (Download CV) */
.btn-secondary {
  display: inline-block;
  margin-top: 1rem;
  background: transparent;
  color: #66fcf1;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  text-decoration: none;
  border: 1px solid rgba(102,252,241,0.15);
  transition: all 0.2s ease;
  font-weight: 600;
}

.btn-secondary:hover {
  background: rgba(102,252,241,0.06);
  transform: translateY(-2px);
}

/* === Section Titles === */
section h2 {
  text-align: center;
  font-size: 1.6rem;
  margin-bottom: 1rem;
  color: #66fcf1;
}

/* === About Section === */
.about {
  padding: 4rem 6%;
  background-color: #1f2833;
  text-align: center;
}

.about p {
  max-width: 800px;
  margin: 0.5rem auto;
  color: #c5c6c7;
  font-size: 1rem;
}

/* === Projects Section === */
.projects {
  padding: 4rem 6%;
  background-color: #0b0c10;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.6rem;
  margin-top: 1rem;
}

.project-card {
  background-color: #1f2833;
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 20px rgba(102, 252, 241, 0.12);
}

.project-card h3 {
  color: #66fcf1;
  margin-bottom: 0.6rem;
}

.project-card p {
  color: #c5c6c7;
  font-size: 0.95rem;
}

/* Responsive iframe container */
.iframe-container {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 aspect */
  overflow: hidden;
  border-radius: 8px;
  margin-top: 0.8rem;
  background: #0b0c10;
}

.iframe-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* === Fade-In Animation === */
.fade-section {
  opacity: 0;
  transform: translateY(28px);
  transition: all 0.7s cubic-bezier(.22,.9,.16,1);
  will-change: opacity, transform;
}
.fade-section.appear {
  opacity: 1;
  transform: translateY(0);
}

/* === Contact Section === */
.contact {
  padding: 4rem 6%;
  background-color: #1f2833;
  text-align: center;
}

/* Contact links as cards (added subtle contrast) */
.contact-card {
  display: inline-block;
  background-color: #19232d;
  padding: 1.2rem 2rem;
  border-radius: 12px;
  margin: 0.4rem 0;
  transition: background 0.2s ease, transform 0.2s ease;
}

.contact-card a {
  color: #66fcf1;
  text-decoration: none;
  font-weight: 600;
}

.contact-card a:hover {
  text-decoration: underline;
  color: #7ef2f0; /* brighter turquoise */
}

/* Hover effect for card */
.contact-card:hover {
  background-color: #22313f;
  transform: translateY(-2px);
}

/* === Footer === */
footer {
  text-align: center;
  padding: 2rem 6%;
  background-color: #0b0c10;
  color: #c5c6c7;
  font-size: 0.9rem;
  border-top: 1px solid #1f2833;
}

/* === Chat Bubble === */
#chat-bubble {
  position: fixed;
  bottom: 18px;
  right: 18px;
  border-radius: 12px;
  overflow: hidden;
  z-index: 999;
  transition: all 0.25s ease;
  font-family: 'Poppins', sans-serif;
}

/* Collapsed chat bubble */
#chat-bubble.collapsed {
  height: 52px;
  background: linear-gradient(135deg,#1f5eff,#4fc3f7);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(15,23,42,0.35);
  padding: 0 16px;
  width: auto;
  min-width: 90px;
}

/* Bubble text/icon */
.chat-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-weight: 600;
  color: #fff;
}
.chat-text { font-size: 1rem; }

/* Expanded chat bubble */
#chat-bubble.expanded {
  width: 320px;
  background: #fff;
  color: #333;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

#chat-bubble.expanded .chat-header {
  display: block;
  background: linear-gradient(135deg, #1f5eff, #4fc3f7);
  color: #fff;
  padding: 10px 12px;
  font-weight: 600;
  text-align: center;
}

/* Chat window */
#chat-window {
  padding: 12px;
  max-height: 260px;
  overflow-y: auto;
  background: #f8f9fb;
}

.hidden { display: none !important; }

.message {
  margin-bottom: 0.6rem;
  padding: 0.6rem 0.9rem;
  border-radius: 10px;
  width: fit-content;
  max-width: 90%;
  font-size: 0.95rem;
}

.message.bot { background: #e9f3ff; color: #333; }
.message.user { background: #0078d7; color: white; margin-left: auto; }

#chat-form {
  display: flex;
  gap: 8px;
  padding: 10px;
  border-top: 1px solid #eee;
  background: #fff;
}

#chat-form input {
  flex: 1;
  padding: 0.6rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  outline: none;
  font-size: 0.95rem;
}

#chat-form button {
  background: #0078d7;
  color: white;
  border: none;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s;
}
#chat-form button:hover { background: #005fa3; }

/* Accessibility focus */
a:focus, button:focus, input:focus {
  outline: 2px dashed rgba(102,252,241,0.25);
  outline-offset: 3px;
}

/* === Responsive adjustments === */
@media (max-width: 820px) {
  .navbar { padding: 1rem 4%; }
  .hero { padding: 4rem 4%; }
  .about, .projects, .contact { padding: 3rem 4%; }
  .hero h1 { font-size: 1.9rem; }
  #chat-bubble { right: 12px; bottom: 12px; width: auto; }
  #chat-bubble.expanded { width: 300px; }
}

@media (max-width: 480px) {
  .nav-links { gap: 0.8rem; font-size: 0.95rem; }
  .project-grid { gap: 1rem; }
  .hero h1 { font-size: 1.6rem; }
  #chat-bubble { width: auto; min-width: 80px; }
  #chat-bubble.expanded { width: 94vw; right: 3%; left: 3%; }
}