/* ===== RESET & VARIABLES ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --clr-bg: #0f172a;
  --clr-surface: #1e293b;
  --clr-surface-alt: #162032;
  --clr-primary: #38bdf8;
  --clr-primary-hover: #7dd3fc;
  --clr-text: #e2e8f0;
  --clr-text-muted: #94a3b8;
  --clr-border: #334155;
  --clr-card: #1e293b;
  --radius: 10px;
  --transition: 0.25s ease;
  --max-width: 1100px;
}

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

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--clr-bg);
  color: var(--clr-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--clr-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--clr-primary-hover); }

img { max-width: 100%; display: block; }

/* ===== UTILITIES ===== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }
.section-alt { background: var(--clr-surface-alt); }
.section-title {
  font-size: 2rem;
  margin-bottom: 2.5rem;
  text-align: center;
  position: relative;
}
.section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background: var(--clr-primary);
  margin: 0.6rem auto 0;
  border-radius: 2px;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--clr-primary);
  color: var(--clr-bg);
}
.btn-primary:hover {
  background: var(--clr-primary-hover);
  color: var(--clr-bg);
}
.btn-outline {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--clr-primary);
  color: var(--clr-bg);
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--clr-border);
  transition: background var(--transition);
}
.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-text);
}
.nav-logo:hover { color: var(--clr-primary); }
.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
}
.nav-links a {
  color: var(--clr-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover { color: var(--clr-primary); }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--clr-text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 1.5rem 4rem;
}
.hero-greeting {
  font-size: 1.1rem;
  color: var(--clr-primary);
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}
.hero-name {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}
.hero-title {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  color: var(--clr-text-muted);
  font-weight: 400;
  margin-bottom: 1.5rem;
}
.hero-intro {
  max-width: 600px;
  margin: 0 auto 1.5rem;
  color: var(--clr-text-muted);
  font-size: 1.05rem;
}
.hero-badges {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}
.badge {
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--clr-primary);
  padding: 0.4rem 1rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
}
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: transform var(--transition), border-color var(--transition);
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--clr-primary);
}
.project-icon { font-size: 2rem; margin-bottom: 1rem; }
.project-card h3 { font-size: 1.2rem; margin-bottom: 0.75rem; }
.project-card p { color: var(--clr-text-muted); font-size: 0.92rem; margin-bottom: 1rem; }
.tech-stack { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tech-stack span {
  background: rgba(56, 189, 248, 0.1);
  color: var(--clr-primary);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 500;
}

/* ===== RESUME / ABOUT ===== */
.resume-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}
.resume-heading {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: var(--clr-primary);
}
.timeline-item {
  position: relative;
  padding-left: 1.25rem;
  border-left: 2px solid var(--clr-border);
  margin-bottom: 1.75rem;
}
.timeline-date {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  display: block;
  margin-bottom: 0.25rem;
}
.timeline-item h4 { font-size: 1rem; margin-bottom: 0.35rem; }
.timeline-item p { color: var(--clr-text-muted); font-size: 0.9rem; }
.skills-list { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.skills-list span {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius);
  font-size: 0.88rem;
}

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.contact-info p { color: var(--clr-text-muted); margin-bottom: 1.5rem; font-size: 1.05rem; }
.contact-links { list-style: none; }
.contact-links li { margin-bottom: 0.75rem; font-size: 1rem; }
.contact-form { display: flex; flex-direction: column; gap: 1rem; }
.contact-form input,
.contact-form textarea {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  color: var(--clr-text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition);
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--clr-primary);
}

/* ===== CHATBOT ===== */
.chatbot-toggle {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--clr-primary);
  color: var(--clr-bg);
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(56, 189, 248, 0.35);
  z-index: 200;
  transition: transform var(--transition);
  border: none;
}
.chatbot-toggle:hover { transform: scale(1.1); }

.chatbot-window {
  position: fixed;
  bottom: 5.5rem;
  right: 1.5rem;
  width: 380px;
  max-height: 520px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  display: none;
  flex-direction: column;
  z-index: 200;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}
.chatbot-window.open { display: flex; }

.chatbot-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: var(--clr-bg);
  border-bottom: 1px solid var(--clr-border);
  font-weight: 600;
}
.chatbot-close {
  background: none;
  border: none;
  color: var(--clr-text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}
.chatbot-close:hover { color: var(--clr-text); }

.chatbot-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 300px;
}
.chat-msg p {
  padding: 0.7rem 1rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  line-height: 1.5;
  max-width: 90%;
  word-wrap: break-word;
}
.chat-msg.bot p {
  background: var(--clr-bg);
  align-self: flex-start;
  border-bottom-left-radius: 2px;
}
.chat-msg.user p {
  background: var(--clr-primary);
  color: var(--clr-bg);
  align-self: flex-end;
  margin-left: auto;
  border-bottom-right-radius: 2px;
}
.chat-msg.bot { display: flex; }
.chat-msg.user { display: flex; justify-content: flex-end; }

.chatbot-input {
  display: flex;
  border-top: 1px solid var(--clr-border);
}
.chatbot-input input {
  flex: 1;
  padding: 0.85rem 1rem;
  background: var(--clr-bg);
  border: none;
  color: var(--clr-text);
  font-size: 0.9rem;
  font-family: inherit;
}
.chatbot-input input:focus { outline: none; }
.chatbot-input button {
  padding: 0 1.1rem;
  background: var(--clr-primary);
  border: none;
  color: var(--clr-bg);
  font-size: 1.1rem;
  cursor: pointer;
  transition: background var(--transition);
}
.chatbot-input button:hover { background: var(--clr-primary-hover); }

/* Loading dots */
.typing-indicator span {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin: 0 2px;
  background: var(--clr-text-muted);
  border-radius: 50%;
  animation: bounce 1.2s infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-6px); }
}

/* ===== PRICING ===== */
.pricing-note {
  text-align: center;
  color: var(--clr-text-muted);
  font-size: 0.9rem;
  margin-top: -1.5rem;
  margin-bottom: 2.5rem;
}
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.pricing-card {
  background: var(--clr-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), border-color var(--transition);
}
.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--clr-primary);
}
.pricing-card.featured {
  border-color: var(--clr-primary);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.15);
}
.pricing-card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.25rem;
}
.pricing-tagline {
  color: var(--clr-text-muted);
  font-size: 0.88rem;
  margin-bottom: 1.25rem;
}
.pricing-prices {
  margin-bottom: 1.25rem;
}
.pricing-prices .setup {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-primary);
}
.pricing-prices .monthly {
  font-size: 0.95rem;
  color: var(--clr-text-muted);
  margin-top: 0.25rem;
}
.pricing-includes-prefix {
  font-size: 0.85rem;
  color: var(--clr-primary);
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.pricing-features {
  list-style: none;
  margin-bottom: 1.5rem;
  flex: 1;
}
.pricing-features li {
  font-size: 0.88rem;
  color: var(--clr-text-muted);
  padding: 0.3rem 0;
}
.pricing-features li::before {
  content: "\2705 ";
}
.pricing-best-for {
  background: rgba(56, 189, 248, 0.05);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: var(--clr-text-muted);
}
.pricing-best-for strong {
  color: var(--clr-text);
  display: block;
  margin-bottom: 0.25rem;
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--clr-text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--clr-border);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.97);
    padding: 1rem 1.5rem;
    gap: 1rem;
    border-bottom: 1px solid var(--clr-border);
  }
  .nav-links.active { display: flex; }
  .resume-grid,
  .contact-grid { grid-template-columns: 1fr; gap: 2rem; }
  .chatbot-window {
    width: calc(100vw - 2rem);
    right: 1rem;
    bottom: 5rem;
    max-height: 70vh;
  }
}