/* RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  background-color: #0a1628;
  color: #e8eaf0;
}

/* ================= NAVBAR ================= */

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 40px;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: #0a1628;
  border-bottom: 1px solid #1e3a5f;
  z-index: 1000;
}

.logo {
  font-weight: bold;
  font-size: 24px;
  text-decoration: none;
  color: #e8eaf0;
  flex: 1;
  font-family: 'Orbitron', monospace;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 100px;
  font-size: 18px;
}

nav ul li a {
  text-decoration: none;
  color: #e8eaf0;
  position: relative;
  padding-bottom: 4px;
}

nav ul li a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: #4fc3f7;
  transition: width 0.2s ease;
}

nav ul li a:hover::after {
  width: 100%;
}

.contact-wrapper {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.contact-btn {
  text-decoration: none;
  color: #4fc3f7;
  border: 1.5px solid #4fc3f7;
  padding: 8px 20px;
  font-size: 16px;
  border-radius: 4px;
  transition: 0.2s ease;
}

.contact-btn:hover {
  background-color: #4fc3f7;
  color: #0a1628;
}

/* ================= HOME ================= */

#home {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 120px;
  height: 100vh;
  padding-top: 100px;
}

#home img {
  width: 420px;
  height: 420px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid #1e3a5f;
}

#home h1 {
  font-size: 80px;
}

#home div {
  text-align: center;
}

.container {
  display: inline-block;
  text-align: left;
}

.text {
  font-weight: bold;
  font-family: 'Courier New', monospace;
  white-space: nowrap;
  overflow: hidden;
}

/* "Hello, I am" — 11 chars, types in 1.5s, cursor disappears after */
.greeting-line {
  font-size: 2.5vw;
  font-weight: normal;
  color: #90a4b8;
  border-right: 4px solid #e8eaf0;
  animation:
    typing-greeting 1.5s steps(11) forwards,
    cursor .4s step-end infinite alternate,
    cursor-hide 0s 1.5s forwards;
}

@keyframes cursor-hide {
  to { border-color: transparent }
}

/* "Anh Nguyen" — 10 chars, starts after 1.5s, cursor stays after */
.name-line {
  font-size: 4vw;
  font-family: 'Orbitron', monospace;
  font-weight: 900;
  letter-spacing: 6px;
  color: #e8eaf0;
  border-right: 6px solid transparent;
  animation:
    typing-name 1.5s steps(10) 1.5s both,
    cursor-appear 0s 1.5s forwards,
    cursor .4s step-end 1.5s infinite alternate;
}

@keyframes cursor-appear {
  to { border-color: #4fc3f7 }
}

/* cursor blinking */
@keyframes cursor {
  from { border-color: #4fc3f7 }
  50%  { border-color: transparent }
  to   { border-color: #4fc3f7 }
}

@keyframes typing-greeting {
  from { width: 0 }
  to   { width: 100% }
}

@keyframes typing-name {
  from { width: 0 }
  to   { width: 100% }
}

.subtitle {
  font-size: 1.8vw;
  font-family: 'Courier New', monospace;
  color: #90a4b8;
  letter-spacing: 2px;
  margin-top: 12px;
  opacity: 0;
  transition: opacity 1s ease;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 16px;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.social-links a {
  font-size: 2vw;
  color: #90a4b8;
  text-decoration: none;
  transition: color 0.2s ease;
}

.social-links a:hover {
  color: #4fc3f7;
}

.home-stats {
  display: flex;
  justify-content: center;
  margin-top: 28px;
  opacity: 0;
  transition: opacity 0.6s ease;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  border-left: 3px solid #4fc3f7;
  padding-left: 16px;
}

.stat-number {
  font-size: 2.4vw;
  font-weight: 900;
  font-family: 'Orbitron', monospace;
  color: #e8eaf0;
  line-height: 1;
}

.stat-label {
  font-size: 0.85vw;
  color: #90a4b8;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-top: 4px;
}

#rotating-title {
  color: #4fc3f7;
  font-weight: bold;
  transition: opacity 0.4s ease;
}

/* ================= ABOUT ME ================= */

#aboutme {
  height: 100vh;
  padding: 20px 80px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  background: #0a1628;
  box-sizing: border-box;
  overflow: hidden;
}

.aboutme-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

.aboutme-photo {
  flex-shrink: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 420px;
}

.aboutme-photo img {
  width: 170px;
  height: 185px;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
  transition: transform 0.2s ease;
}

.aboutme-photo img:hover {
  transform: scale(1.03);
}

.aboutme-block {
  flex: 1;
  max-width: 620px;
}

#aboutme h1 {
  font-size: 40px;
  margin-bottom: 4px;
  position: relative;
  display: inline-block;
  color: #e8eaf0;
}

#aboutme h1::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: #4fc3f7;
  margin-top: 8px;
  border-radius: 2px;
}

.aboutme-bio {
  font-size: 20px;
  line-height: 1.6;
  color: #b0bec5;
  margin: 6px 0;
}

.aboutme-cards {
  display: flex;
  flex-direction: row;
  gap: 30px;
  margin-top: 16px;
}

.aboutme-card {
  background: transparent;
  border: none;
  padding: 6px 0;
  min-width: 180px;
}

.aboutme-card strong {
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #4fc3f7;
  display: block;
  margin-bottom: 6px;
}

.aboutme-card p {
  font-size: 18px;
  color: #b0bec5;
  margin: 0;
  line-height: 1.6;
}

/* ================= EXPERIENCES ================= */

#experiences {
  min-height: 100vh;
  padding: 120px 80px 80px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background: #0a1628;
}

.experiences-container {
  max-width: 1200px;
  width: 100%;
}

#experiences h1 {
  font-size: 48px;
  text-align: center;
  margin-bottom: 40px;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
  color: #e8eaf0;
}

#experiences h1::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: #4fc3f7;
  margin: 8px auto 0;
  border-radius: 2px;
}

.experience-card {
  border-left: 4px solid #4fc3f7;
  padding: 18px 24px;
  margin-bottom: 32px;
  background: #112240;
  border-radius: 0 8px 8px 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
  transition: transform 0.2s ease;
}

.experience-card:hover {
  transform: translateX(4px);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.experience-card h2 {
  font-size: 22px;
  color: #e8eaf0;
}

.experience-card h3 {
  font-size: 18px;
  font-weight: normal;
  color: #90a4b8;
  margin-top: 4px;
}

.experience-date {
  font-size: 16px;
  color: #90a4b8;
  white-space: nowrap;
}

.experience-card ul {
  padding-left: 20px;
}

.experience-card ul li {
  font-size: 18px;
  line-height: 1.7;
  margin-bottom: 6px;
  color: #b0bec5;
}

/* ================= PROJECTS ================= */

#projects {
  min-height: 100vh;
  padding: 10px 60px 160px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background: #0a1628;
}

.projects-container {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

#projects h1 {
  font-size: 48px;
  margin-bottom: 6px;
  text-align: center;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
  color: #e8eaf0;
}

#projects h1::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: #4fc3f7;
  margin: 8px auto 0;
  border-radius: 2px;
}

#projects h2 {
  font-size: 28px;
  margin: 36px 0 16px;
  color: #90a4b8;
  text-align: center;
}

.project-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding-bottom: 8px;
  justify-content: center;
}

.project-scroll::-webkit-scrollbar {
  height: 4px;
}

.project-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.project-scroll::-webkit-scrollbar-thumb {
  background: #1e3a5f;
  border-radius: 4px;
}

.project-card {
  min-width: 260px;
  width: 260px;
  border: 1px solid #1e3a5f;
  border-radius: 10px;
  padding: 16px;
  background: #112240;
  cursor: pointer;
  transition: 0.2s ease;
  display: flex;
  flex-direction: column;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.5);
  border-color: #4fc3f7;
}

.project-card img {
  width: 100%;
  height: 100px;
  object-fit: cover;
  object-position: center top;
  margin-bottom: 12px;
  border-radius: 6px;
  flex-shrink: 0;
}

.project-card h3 {
  font-size: 15px;
  margin-bottom: 6px;
  min-height: 36px;
  color: #e8eaf0;
}

.project-card .preview {
  font-size: 13px;
  color: #90a4b8;
  margin-bottom: 12px;
  flex: 1;
}

.view-btn {
  margin-top: auto;
  align-self: flex-start;
  background: transparent;
  border: 1px solid #4fc3f7;
  color: #4fc3f7;
  padding: 6px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  transition: 0.2s ease;
}

.view-btn:hover {
  background: #4fc3f7;
  color: #0a1628;
}

.project-details {
  display: none;
  font-size: 14px;
}

.project-card.open .project-details {
  display: block;
}

/* ================= SKILLS ================= */

#skills {
  min-height: 100vh;
  padding: 120px 80px 80px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background: #0a1628;
}

.skills-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

#skills h1 {
  font-size: 48px;
  text-align: center;
  margin-bottom: 6px;
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
  color: #e8eaf0;
}

#skills h1::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: #4fc3f7;
  margin: 8px auto 40px;
  border-radius: 2px;
}

#skills h2 {
  font-size: 26px;
  margin: 30px 0 16px;
  color: #90a4b8;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
  gap: 24px;
  margin-bottom: 40px;
}

.skills-grid.row-10 {
  grid-template-columns: repeat(10, 1fr);
}

.skills-grid i {
  font-size: 72px;
  display: grid;
  place-items: center;
  transition: 0.2s ease;
}

.devicon-github-plain {
  color: #e8eaf0 !important;
}

.skills-grid i:hover {
  transform: scale(1.1);
}

/* ================= MODAL ================= */
.modal {
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  transition: all 0.3s ease-in-out;
  z-index: -1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 2000;
  justify-content: center;
  align-items: center;
}

.modal-overlay.open {
  display: flex;
}

.modal.open {
  opacity: 1;
  z-index: 999;
}

.modal-content {
  position: relative;
  width: min(700px, 92vw);
  max-height: 88vh;
  overflow-y: auto;
  background: #112240;
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  border: 1px solid #1e3a5f;
}

.modal-content h2 {
  font-size: 28px;
  margin-bottom: 10px;
  color: #e8eaf0;
}

.modal-content p {
  font-size: 17px;
  line-height: 1.6;
  margin-bottom: 10px;
  color: #b0bec5;
}

.modal-content a {
  display: inline-block;
  margin-top: 8px;
  text-decoration: none;
  border: 1px solid #4fc3f7;
  color: #4fc3f7;
  padding: 8px 14px;
  border-radius: 6px;
}

.modal-content a:hover {
  background: #4fc3f7;
  color: #0a1628;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 10px;
  border: 0;
  background: transparent;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  color: #90a4b8;
}

.modal-close:hover {
  color: #e8eaf0;
}

.modal-inner {
  background-color: #112240;
  border-radius: 5px;
  text-align: center;
  width: 380px;
}

.modal-inner h2 {
  margin: 0;
  line-height: 24px;
  margin: 10px 0;
}

/* Offset for fixed navbar when scrolling */
section {
  scroll-margin-top: 100px;
  width: min(1400px, 100%);
  margin: 0 auto;
}

/* ================= CONTACTS ================= */
#contacts {
  min-height: 100vh;
  padding: 120px 80px 80px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  background: #0a1628;
}

.contacts-container {
  display: flex;
  align-items: center;
  justify-content: space-evenly;
  width: 100%;
  max-width: 1200px;
}

.contact-left {
  display: flex;
  flex-direction: column;
  align-items: start;
  gap: 20px;
}

.contact-left-title h2 {
  font-weight: 600;
  font-size: 40px;
  margin-bottom: 5px;
  color: #e8eaf0;
}

.contact-left-title hr {
  border: none;
  width: 120px;
  height: 5px;
}

.contact-inputs {
  width: 360px;
  height: 50px;
  border: 1px solid #1e3a5f;
  outline: none;
  padding-left: 25px;
  font-weight: 500;
  border-radius: 50px;
  font-size: 18px;
  background: #112240;
  color: #e8eaf0;
}

.contact-left textarea {
  height: 140px;
  padding-top: 15px;
  border-radius: 20px;
}

.contact-inputs:focus {
  border: 2px solid #4fc3f7;
}

.contact-inputs::placeholder {
  color: #4a6080;
}

.contact-left button {
  display: flex;
  align-items: center;
  padding: 15px 30px;
  font-size: 16px;
  color: #0a1628;
  gap: 10px;
  border: none;
  border-radius: 50px;
  background: linear-gradient(270deg, #1a78c2, #4fc3f7);
  cursor: pointer;
  font-weight: bold;
}