/* ----- CSS variables (light & dark) ----- */
:root {
  --bg-body: #f4f6fa;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-soft: #e6edf6;
  --bg-badge: #eef3f9;
  --text-primary: #1e1e2f;
  --text-secondary: #2d3a4a;
  --text-muted: #3d4a5e;
  --text-soft: #5c6a7e;
  --border-light: rgba(0,0,0,0.05);
  --border-card: rgba(0,0,0,0.02);
  --border-card-hover: #e0e8f2;
  --border-soft: #eaedf2;
  --shadow-card: 0 8px 24px rgba(0, 20, 40, 0.04);
  --shadow-card-hover: 0 18px 36px -6px rgba(0, 20, 40, 0.12);
  --btn-primary-bg: #1e2b48;
  --btn-primary-hover: #2a3d64;
  --btn-primary-text: white;
  --btn-secondary-border: #1e2b48;
  --btn-secondary-text: #1e2b48;
  --btn-secondary-hover-bg: #1e2b48;
  --btn-secondary-hover-text: white;
  --avatar-bg: linear-gradient(145deg, #d9e2ef, #b7c6dd);
  --avatar-text: #1a2a4a;
  --badge-text: #1a4b8c;
  --highlight-start: #0b2b5e;
  --highlight-end: #2d5aa0;
  --logo-gradient: linear-gradient(145deg, #1a2a6c, #b21f1f, #fdbb2d);
  --section-underline: #1a4b8c;
  --contact-bg: #ffffff;
  --contact-border: #e4ebf3;
  --footer-border: #e2e8f0;
  --icon-color: #1a4b8c;
  --pill-bg: #e6edf6;
  --pill-text: #162b4a;
  --badge-bg: #e6edf6;
  --bg-animation-layer: rgba(244, 246, 250, 0.5);
}

/* dark theme */
[data-theme="dark"] {
  --bg-body: #12121c;
  --bg-card: #1e1e2e;
  --bg-card-hover: #26263a;
  --bg-soft: #2a2a40;
  --bg-badge: #2d2d44;
  --text-primary: #eaeef6;
  --text-secondary: #c8d0dd;
  --text-muted: #b0baca;
  --text-soft: #8e9aaf;
  --border-light: rgba(255,255,255,0.06);
  --border-card: rgba(255,255,255,0.04);
  --border-card-hover: #3a3a55;
  --border-soft: #2f2f48;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-card-hover: 0 18px 36px -6px rgba(0, 0, 0, 0.7);
  --btn-primary-bg: #3d5a8c;
  --btn-primary-hover: #4f70a8;
  --btn-primary-text: white;
  --btn-secondary-border: #8aa0c9;
  --btn-secondary-text: #c8d6f0;
  --btn-secondary-hover-bg: #3d5a8c;
  --btn-secondary-hover-text: white;
  --avatar-bg: linear-gradient(145deg, #2a2a44, #1a1a30);
  --avatar-text: #bcc6dd;
  --badge-text: #aac0e6;
  --highlight-start: #6d8fc9;
  --highlight-end: #aac0e6;
  --logo-gradient: linear-gradient(145deg, #6d8fc9, #c97a7a, #fdbb2d);
  --section-underline: #6d8fc9;
  --contact-bg: #1a1a2c;
  --contact-border: #2f2f48;
  --footer-border: #2a2a40;
  --icon-color: #8aa9e0;
  --pill-bg: #2d2d44;
  --pill-text: #d0daf0;
  --badge-bg: #2a2a44;
  --bg-animation-layer: rgba(18, 18, 28, 0.6);
}

/* ----- base & reset ----- */
html {
  scroll-behavior: smooth;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Roboto, system-ui, -apple-system, sans-serif;
}

body {
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.2s ease;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* ----- animated background (career themed) ----- */
#animated-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background: var(--bg-body);
  transition: background 0.3s ease;
}

/* the canvas sits inside, we use a pseudo-layer for blending */
#bg-canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: transparent;
}

/* overlay to soften and ensure readability */
.bg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  background: var(--bg-animation-layer);
  -webkit-backdrop-filter: blur(1px);
  backdrop-filter: blur(1px);
  transition: background 0.3s ease;
}

/* content layer above background */
.container {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ----- theme toggle button ----- */
.theme-toggle {
  background: var(--bg-soft);
  border: none;
  border-radius: 40px;
  padding: 0.4rem 1rem 0.4rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  border: 1px solid var(--border-light);
}

.theme-toggle:hover {
  background: var(--border-card-hover);
  transform: scale(1.02);
}

.theme-toggle i {
  font-size: 1.1rem;
  color: var(--icon-color);
}

/* navbar */
.navbar {
  position: sticky;
  top: 1rem;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.8rem 1.2rem;
  margin-top: 0.5rem;
  border: 1px solid var(--border-light);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.55);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: 0 12px 30px rgba(17, 24, 39, 0.08);
}

[data-theme="dark"] .navbar {
  background: rgba(18, 18, 28, 0.7);
}

.logo {
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: -0.5px;
  background: var(--logo-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.logo span {
  font-weight: 300;
  color: var(--text-primary);
  background: none;
  -webkit-background-clip: unset;
  background-clip: unset;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-weight: 500;
  flex-wrap: wrap;
}

.nav-links a {
  position: relative;
  text-decoration: none;
  color: var(--text-primary);
  transition: color 0.2s ease;
  font-size: 1rem;
  letter-spacing: 0.3px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: var(--icon-color);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--icon-color);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.btn-outline {
  border: 1.5px solid var(--text-primary);
  padding: 0.45rem 1.2rem;
  border-radius: 30px;
  transition: 0.2s;
}

.btn-outline:hover {
  background: var(--text-primary);
  color: var(--bg-body) !important;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 0.28rem;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--border-light);
  border-radius: 12px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  margin: 0 auto;
  border-radius: 10px;
}

/* hero */
.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  margin: 3rem 0 4rem 0;
  gap: 2rem;
}

.hero-content {
  flex: 1 1 400px;
}

.hero-content .badge {
  background: var(--badge-bg);
  padding: 0.3rem 1.2rem;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--badge-text);
  display: inline-block;
  margin-bottom: 1rem;
  letter-spacing: 0.3px;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.8rem;
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, var(--highlight-start), var(--highlight-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.btn-primary {
  background: var(--btn-primary-bg);
  color: var(--btn-primary-text);
  padding: 0.8rem 2.2rem;
  border-radius: 40px;
  font-weight: 600;
  color:white;
  text-decoration: none;
  transition: 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  cursor: default;
}

.btn-primary i,a {
  color: var(--btn-primary-text);
  font-size: 1rem;
  text-decoration: none;
}

.btn-primary:hover {
  background: var(--btn-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(0,20,50,0.15);
}

.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--btn-secondary-border);
  color: var(--btn-secondary-text);
  padding: 0.8rem 2.2rem;
  border-radius: 40px;
  font-weight: 600;
  text-decoration: none;
  transition: 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-secondary i {
  font-size: 1rem;
}

.btn-secondary:hover {
  background: var(--btn-secondary-hover-bg);
  color: var(--btn-secondary-hover-text);
}

.hero-image {
  flex: 1 1 300px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-portrait {
  width: 320px;
  height: 320px;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  border: 4px solid var(--bg-card);
  box-shadow: 0 20px 40px -10px rgba(0,0,0,0.2);
  background: var(--avatar-bg);
  transition: background 0.3s, color 0.3s;
}

/* section titles */
.section-title {
  font-size: 2rem;
  font-weight: 600;
  margin: 3rem 0 1.5rem 0;
  position: relative;
  display: inline-block;
  color: var(--text-primary);
}

.section-title:after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 50px;
  height: 4px;
  background: var(--section-underline);
  border-radius: 4px;
}

/* cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin: 2rem 0 1rem;
}

.card {
  background: var(--bg-card);
  border-radius: 28px;
  padding: 2rem 1.8rem;
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
  border: 1px solid var(--border-card);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-card-hover);
  background: var(--bg-card-hover);
}

.card-icon {
  font-size: 2.4rem;
  color: var(--icon-color);
  margin-bottom: 1rem;
}

.card h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.card p {
  color: var(--text-muted);
  font-size: 0.98rem;
}

.card .tag {
  display: inline-block;
  background: var(--pill-bg);
  padding: 0.2rem 1rem;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--pill-text);
  margin-top: 0.8rem;
}

/* about wrapper */
.about-wrapper {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  margin: 2rem 0 1rem;
}

.about-text {
  flex: 2 1 300px;
}

.about-text p {
  font-size: 1.08rem;
  margin-bottom: 1.2rem;
  color: var(--text-secondary);
}

.about-text i {
  margin-right: 0.5rem;
  color: var(--icon-color);
}

.info-list {
  list-style: none;
  margin-top: 1.2rem;
}

.info-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.7rem;
  font-size: 1rem;
  color: var(--text-primary);
}

.info-list li i {
  width: 1.8rem;
  color: var(--icon-color);
  font-size: 1.2rem;
}

.interest-badge {
  flex: 1 1 200px;
  background: var(--bg-card);
  border-radius: 28px;
  padding: 2rem 1.8rem;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-soft);
  align-self: flex-start;
  transition: background 0.2s;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.interest-badge h4 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  color: var(--text-primary);
}

.interest-badge .pill {
  display: inline-block;
  background: var(--pill-bg);
  padding: 0.4rem 1.4rem;
  border-radius: 40px;
  font-size: 0.9rem;
  font-weight: 500;
  margin: 0.25rem 0.2rem;
  color: var(--pill-text);
}

/* contact */
.contact-block {
  background: var(--contact-bg);
  border-radius: 40px;
  padding: 2.5rem 2.5rem;
  margin: 3rem 0 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--contact-border);
  transition: background 0.2s, border 0.2s;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

.contact-block .contact-text h3 {
  font-size: 1.7rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-block .contact-text p {
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.social-links {
  display: flex;
  gap: 1.6rem;
  font-size: 1.8rem;
}

.social-links a {
  color: var(--text-primary);
  transition: 0.2s;
}

.social-links a:hover {
  color: var(--icon-color);
  transform: scale(1.08);
}

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

.footer-copy {
  text-align: center;
  margin-top: 3rem;
  color: var(--text-soft);
  font-size: 0.95rem;
  border-top: 1px solid var(--footer-border);
  padding-top: 2rem;
}

/* utility classes for inline styles */
.icon-margin-right-sm {
  margin-right: 0.4rem;
}

.icon-margin-right-md {
  margin-right: 6px;
}

.icon-margin-right-lg {
  margin-right: 8px;
}

.icon-margin-right-xl {
  margin-right: 10px;
}

.quote-icon {
  opacity: 0.5;
  font-size: 1.2rem;
}

.flex-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.interest-footer {
  margin-top: 1.2rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.check-circle-green {
  color: #1e7e34;
}

.interest-footer-strong {
  font-weight: 500;
}

.footer-note {
  font-size: 0.8rem;
  margin-top: 0.3rem;
  opacity: 0.6;
}

/* section spacing for sticky nav */
#about,
#skills,
#contact {
  scroll-margin-top: 6rem;
}

/* responsive */
@media (max-width: 720px) {
  .navbar {
    align-items: center;
    padding: 0.8rem 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    padding-top: 0.5rem;
  }

  .nav-links.open {
    display: flex;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }
  .hero-image .avatar-placeholder {
    width: 200px;
    height: 200px;
    font-size: 4.5rem;
  }
  .contact-block {
    flex-direction: column;
    align-items: start;
    gap: 1.5rem;
  }
  .theme-toggle {
    padding: 0.3rem 0.8rem 0.3rem 1rem;
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: start;
  }
  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
}