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

/* ---------- Theme ---------- */
:root {
  --bg: #0b0f19;
  --surface: #12182b;
  --text: #e6e9f0;
  --muted: #9aa4bf;
  --accent: #4cc9f0;
  --border: #1f2a44;
  --glow: rgba(76, 201, 240, 0.3);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
[data-theme="light"] {
  --bg: #f8f9fa;
  --surface: #ffffff;
  --text: #1a1a1a;
  --muted: #666666;
  --accent: #0066cc;
  --border: #e0e0e0;
  --glow: rgba(0, 102, 204, 0.2);
}

body {
  font-family: Inter, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

/* ---------- Layout ---------- */
.container {
  max-width: 1000px;
  margin: auto;
  padding: 2rem 1.5rem;
}

main {
  min-height: 80vh;
}

/* ---------- Header ---------- */
header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

nav {
  display: flex;
  gap: 1.5rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  color: var(--accent);
}

main {
  padding-top: 96px; /* header height + breathing room */
}

/* ---------- Fixed Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(12px) saturate(180%);
  border-bottom: 1px solid rgba(76, 201, 240, 0.2);
  z-index: 1000;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 8px 32px rgba(76, 201, 240, 0.1);
  transition: var(--transition);
}

.site-header:hover {
  box-shadow: 0 8px 32px rgba(76, 201, 240, 0.2);
}

/* ---------- Navigation ---------- */
.nav {
  width: 80vw;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
  white-space: nowrap;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  transition: var(--transition);
  position: relative;
}

.nav a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transition: width 0.3s ease;
}

.nav a:hover {
  color: var(--accent);
  background: rgba(76, 201, 240, 0.1);
}

.nav a:hover::before {
  width: 100%;
}


/* ---------- Hero ---------- */
.hero {
  text-align: center;
  margin-top: 4rem;
}

.avatar {
  width: 130px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  margin-bottom: 1rem;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 1.5rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  background: var(--accent);
  color: #000;
  font-weight: 600;
  text-decoration: none;
  margin: 0.3rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(76, 201, 240, 0.3);
  border: 2px solid var(--accent);
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(76, 201, 240, 0.5);
}

.btn:active {
  transform: translateY(0);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn.secondary {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
  box-shadow: 0 0 20px var(--glow);
}

.btn.secondary:hover {
  background: rgba(76, 201, 240, 0.1);
  box-shadow: 0 0 30px rgba(76, 201, 240, 0.5);
}

/* ---------- Typography ---------- */
h1, h2, h3 {
  margin-bottom: 0.8rem;
}

p {
  margin-bottom: 1rem;
  color: var(--muted);
}

ul {
  margin-left: 1.2rem;
  margin-bottom: 1.5rem;
}

/* ---------- Cards (Projects / Articles) ---------- */
.card {
  background: rgba(18, 24, 43, 0.6);
  backdrop-filter: blur(10px) saturate(180%);
  border: 1px solid rgba(76, 201, 240, 0.2);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: var(--transition);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(76, 201, 240, 0.1), transparent);
  transition: left 0.5s;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(76, 201, 240, 0.5);
  box-shadow: 0 12px 48px rgba(76, 201, 240, 0.15);
}

.card:hover::before {
  left: 100%;
}

.card h3 a {
  color: var(--text);
  text-decoration: none;
  transition: var(--transition);
}

.card h3 a:hover {
  color: var(--accent);
}

.meta {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  margin-top: 4rem;
  padding: 2rem 1rem;
  text-align: center;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  margin: 0 0.5rem;
  text-decoration: none;
}

footer a:hover {
  color: var(--accent);
}

/* ---------- Social Icons ---------- */
/* ---------- Social Icons (LOCKED SIZE) ---------- */
.social-icons {
  display: flex;
  gap: 8px;
  justify-content: center;
  align-items: center;
  margin-top: 0.75rem;
}

.social-icons a {
  display: inline-flex;
  width: 18px;
  height: 18px;
  line-height: 1;
  transition: transform 0.15s ease;
}

.social-icons a:hover {
  transform: scale(1.15);
}

.social-icons img {
  width: 18px;
  height: 18px;
  max-width: 18px;
  max-height: 18px;
  display: block;
}

/* ---------- Skills Section ---------- */
.skills {
  margin-top: 3rem;
}

.skill {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
}

.skill img {
  width: 28px;
  height: 28px;
}

.skill-info strong {
  display: block;
  font-size: 0.95rem;
}

.version {
  color: var(--muted);
  font-weight: 400;
  font-size: 0.85rem;
}

/* Progress bar */
.progress {
  background: var(--surface);
  border-radius: 6px;
  overflow: hidden;
  height: 8px;
  margin-top: 6px;
}

.progress span {
  display: block;
  height: 100%;
  background: var(--accent);
}

/* Certificate link */
.cert {
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
}

.cert:hover {
  text-decoration: underline;
}

.cert.muted {
  color: var(--muted);
  cursor: default;
}

/* ---------- BENTO GRID LAYOUT ---------- */
#projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  padding: 0;
}

.project-card {
  background: rgba(18, 24, 43, 0.6);
  backdrop-filter: blur(10px) saturate(180%);
  border: 1px solid rgba(76, 201, 240, 0.2);
  border-radius: 16px;
  padding: 1.5rem;
  transition: var(--transition);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  perspective: 1000px;
  transform-style: preserve-3d;
}

/* Bento sizes: large (2x2), medium (1x2), small (1x1) */
.bento-large {
  grid-column: span 2;
  grid-row: span 2;
}

.bento-medium {
  grid-column: span 1;
  grid-row: span 2;
}

.bento-small {
  grid-column: span 1;
  grid-row: span 1;
}

/* Responsive: Stack on smaller screens */
@media (max-width: 768px) {
  #projects-grid {
    grid-template-columns: 1fr;
  }

  .bento-large,
  .bento-medium {
    grid-column: span 1;
    grid-row: span 1;
  }
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(76, 201, 240, 0.1), transparent);
  transition: left 0.5s;
}

.project-card:hover {
  transform: translateY(-8px) rotateX(5deg);
  border-color: rgba(76, 201, 240, 0.5);
  box-shadow: 0 12px 48px rgba(76, 201, 240, 0.2);
}

.project-card:hover::before {
  left: 100%;
}

.card-image {
  width: 100%;
  height: 200px;
  margin: -1.5rem -1.5rem 1rem -1.5rem;
  overflow: hidden;
  border-radius: 16px 16px 0 0;
  background: linear-gradient(135deg, rgba(76, 201, 240, 0.1), rgba(76, 201, 240, 0.05));
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover .card-image img {
  transform: scale(1.1);
}

.card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-content h3 {
  margin-bottom: 0.5rem;
}

.card-content h3 a {
  color: var(--text);
  text-decoration: none;
  transition: var(--transition);
}

.card-content h3 a:hover {
  color: var(--accent);
}

.card-content p {
  flex: 1;
  color: var(--muted);
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

/* Tech tags */
.tech-tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tech-tag {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: rgba(76, 201, 240, 0.1);
  border: 1px solid rgba(76, 201, 240, 0.3);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--accent);
  transition: var(--transition);
}

.tech-tag:hover {
  background: rgba(76, 201, 240, 0.2);
  border-color: rgba(76, 201, 240, 0.6);
  box-shadow: 0 0 12px rgba(76, 201, 240, 0.3);
}

.card-link {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition);
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
}

.card-link:hover {
  border-bottom-color: var(--accent);
  gap: 1rem;
}

/* ---------- TYPOGRAPHY ANIMATIONS ---------- */
.char {
  display: inline-block;
  transition: var(--transition);
}

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--accent), #7dd4f0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 1.8rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

/* ---------- THEME TOGGLE ---------- */
#theme-toggle {
  cursor: pointer;
  font-size: 1.2rem;
  background: none;
  border: none;
  padding: 0.5rem;
  border-radius: 6px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
}

#theme-toggle:hover {
  background: rgba(76, 201, 240, 0.1);
  transform: rotate(20deg);
}
/* ---------- DARK MODE TEXT VISIBILITY FIX ---------- */
body[data-theme="dark"] {
  background: #0b0f19;
  color: #e5e7eb;
}

body[data-theme="light"] {
  background: #f8f9fa;
  color: #1a1a1a;
}

/* Headings - Ensure visibility in both themes */
h1, h2, h3, h4, h5, h6 {
  color: var(--text);
}

body[data-theme="dark"] h1,
body[data-theme="dark"] h2,
body[data-theme="dark"] h3,
body[data-theme="dark"] h4,
body[data-theme="dark"] h5,
body[data-theme="dark"] h6 {
  color: #f9fafb;
}

body[data-theme="light"] h1,
body[data-theme="light"] h2,
body[data-theme="light"] h3,
body[data-theme="light"] h4,
body[data-theme="light"] h5,
body[data-theme="light"] h6 {
  color: #111827;
}

/* Navigation and text */
.nav a,
.nav-link {
  color: var(--muted);
}

body[data-theme="dark"] .nav a,
body[data-theme="dark"] .nav-link {
  color: #e5e7eb;
}

body[data-theme="light"] .nav a,
body[data-theme="light"] .nav-link {
  color: #374151;
}

/* Text elements */
p, li, span {
  color: var(--text);
}

body[data-theme="dark"] p,
body[data-theme="dark"] li,
body[data-theme="dark"] span {
  color: #e5e7eb;
}

body[data-theme="light"] p,
body[data-theme="light"] li,
body[data-theme="light"] span {
  color: #374151;
}

/* Cards */
.card,
.project-card {
  color: var(--text);
}

body[data-theme="dark"] .card,
body[data-theme="dark"] .project-card {
  color: #e5e7eb;
}

body[data-theme="light"] .card,
body[data-theme="light"] .project-card {
  color: #111827;
}

/* Links */
a {
  color: var(--accent);
}

body[data-theme="dark"] a {
  color: #60a5fa;
}

body[data-theme="light"] a {
  color: #0066cc;
}

/* Footer */
footer {
  color: var(--text);
}

body[data-theme="dark"] footer {
  color: #e5e7eb;
}

body[data-theme="light"] footer {
  color: #374151;
}

/* ---------- SOCIAL ICONS - THEME AWARE ---------- */
.social-icons {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background-color: #e5e7eb;
  transition: var(--transition);
  text-decoration: none;
}

body[data-theme="dark"] .social-icon {
  background-color: #1f2937;
}

body[data-theme="light"] .social-icon {
  background-color: #f3f4f6;
}

.social-icon:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(76, 201, 240, 0.3);
}

body[data-theme="dark"] .social-icon:hover {
  background-color: #374151;
}

body[data-theme="light"] .social-icon:hover {
  background-color: #e5e7eb;
}

.social-icon img {
  width: 1.2rem;
  height: 1.2rem;
  filter: brightness(0.8);
}

body[data-theme="light"] .social-icon img {
  filter: brightness(1);
}