:root[data-theme="dark"] {
  --bg-primary: #09090b;
  --bg-secondary: #18181b;
  --bg-card: rgba(24, 24, 27, 0.6);
  --bg-card-hover: rgba(39, 39, 42, 0.8);
  --bg-glass: rgba(9, 9, 11, 0.85);

  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;

  --accent-cyan: #e4e4e7;
  --accent-cyan-glow: rgba(228, 228, 231, 0.04);
  --accent-indigo: #a1a1aa;
  --accent-teal: #d4d4d8;

  --border-color: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);

  --code-bg: #18181b;
  --code-header: #27272a;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

:root[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f4f4f5;
  --bg-card: #ffffff;
  --bg-card-hover: #f4f4f5;
  --bg-glass: rgba(255, 255, 255, 0.9);

  --text-primary: #09090b;
  --text-secondary: #52525b;
  --text-muted: #71717a;

  --accent-cyan: #18181b;
  --accent-cyan-glow: rgba(24, 24, 27, 0.04);
  --accent-indigo: #52525b;
  --accent-teal: #3f3f46;

  --border-color: #e4e4e7;
  --border-hover: #d4d4d8;

  --code-bg: #f4f4f5;
  --code-header: #e4e4e7;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  overflow-x: hidden;
  width: 100%;
}

body {
  font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  width: 100%;
  position: relative;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

ul {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Typography Gradient Effect */
.text-gradient {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-indigo) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}


.navbar {
  position: fixed;
  top: 1.25rem;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: calc(100% - 3rem);
  max-width: 1200px;
  z-index: 1000;
  border: 1px solid var(--border-color);
  border-radius: 100px;
  padding: 0.75rem 1.5rem;
  transition: all 0.3s ease;
}

.navbar::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: -1;
}

.navbar.scrolled {
  top: 0.75rem;
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
}

.navbar__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar__logo {
  font-family: 'Fira Code', monospace;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.5px;
}

.navbar__logo-symbol {
  color: var(--accent-cyan);
  margin-right: 0.3rem;
}

.navbar__logo-accent {
  color: var(--accent-cyan);
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.navbar__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.navbar__link .nav-num {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--accent-cyan);
  opacity: 0.8;
}

.navbar__link:hover {
  color: var(--accent-cyan);
}

.navbar__link--cta {
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid var(--border-hover);
  color: var(--accent-cyan) !important;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-weight: 600;
}

.navbar__link--cta:hover {
  background: var(--accent-cyan);
  color: var(--bg-primary) !important;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.language-switcher {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--text-muted);
  font-family: 'Fira Code', monospace;
  font-size: 0.72rem;
  white-space: nowrap;
}

.language-switcher > i {
  color: var(--accent-cyan);
  font-size: 1rem;
  margin-right: 0.1rem;
}

.language-switcher__option {
  padding: 0.2rem 0.1rem;
  color: var(--text-muted);
  font: inherit;
  transition: color 0.2s ease;
}

.language-switcher__option:hover,
.language-switcher__option.is-active {
  color: var(--text-primary);
}

.language-switcher__separator {
  color: var(--border-hover);
}

.navbar__theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all 0.2s ease;
}

.navbar__theme-toggle:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: rotate(15deg);
}

:root[data-theme="dark"] .navbar__theme-icon--light {
  display: none;
}

:root[data-theme="light"] .navbar__theme-icon--dark {
  display: none;
}

.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 30px;
}

.navbar__toggle-bar {
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  transition: 0.3s;
}

.hero {
  position: relative;
  min-height: calc(100vh - 4rem);
  padding-top: 9.5rem;
  padding-bottom: 4rem;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-size: 40px 40px;
  background-image:
    linear-gradient(to right, var(--border-color) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-color) 1px, transparent 1px);
  mask-image: radial-gradient(circle at 50% 40%, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, black 0%, transparent 70%);
  z-index: -2;
}

.hero__radial-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  max-width: 100vw;
  height: 600px;
  background: radial-gradient(circle, var(--accent-cyan-glow) 0%, transparent 70%);
  z-index: -1;
  pointer-events: none;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
  width: 100%;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  background: var(--accent-cyan-glow);
  border: 1px solid var(--border-hover);
  border-radius: 100px;
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: #22C55E;
  border-radius: 50%;
  box-shadow: 0 0 10px #22C55E;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.7);
  }

  70% {
    transform: scale(1);
    box-shadow: 0 0 0 8px rgba(34, 197, 94, 0);
  }

  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(34, 197, 94, 0);
  }
}

.hero__name {
  font-family: 'Sora', sans-serif;
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 1.25rem;
}

.hero__subtitle-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.code-tag {
  font-family: 'Fira Code', monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero__title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.hero__tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 540px;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.25 ease;
}

.btn--primary {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-card-hover) 100%);
  border: 1px solid var(--border-hover);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  transform: translateY(-2px);
  background: var(--bg-card-hover);
  border-color: var(--text-muted);
  box-shadow: var(--shadow-lg);
}

.btn--outline {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn--outline:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.hero__metrics {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-family: 'Sora', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.metric-lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.metric-sep {
  width: 1px;
  height: 35px;
  background: var(--border-color);
}

/* Terminal Card Styling */
.hero__terminal {
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.hero__terminal:hover {
  border-color: var(--border-hover);
}

.terminal__header {
  background: var(--code-header);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.terminal__dots {
  display: flex;
  gap: 6px;
}

.terminal__dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.red {
  background: #EF4444;
}

.dot.yellow {
  background: #F59E0B;
}

.dot.green {
  background: #10B981;
}

.terminal__title {
  font-family: 'Fira Code', monospace;
  font-size: 0.78rem;
  color: #94A3B8;
}

.terminal__badge {
  font-family: 'Fira Code', monospace;
  font-size: 0.68rem;
  background: rgba(255, 255, 255, 0.08);
  color: #38BDF8;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.terminal__body {
  padding: 1rem 1.1rem;
  font-family: 'Fira Code', monospace;
  font-size: 0.78rem;
  line-height: 1.45;
  overflow-x: auto;
}

/* Code Syntax Highlighting Tokens */
.syn-kw {
  color: #F472B6;
}

.syn-var {
  color: #38BDF8;
}

.syn-prop {
  color: #E2E8F0;
}

.syn-str {
  color: #34D399;
}

.syn-num {
  color: #FBBF24;
}

.syn-comment {
  color: #64748B;
  font-style: italic;
}

.syn-fn {
  color: #60A5FA;
}

.terminal__footer {
  background: var(--code-header);
  padding: 0.5rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: #64748B;
  border-top: 1px solid var(--border-color);
}

.terminal__status {
  color: #10B981;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.hero__scroll-down {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-family: 'Fira Code', monospace;
  font-size: 0.7rem;
  letter-spacing: 1px;
  animation: bounce-slow 2.5s infinite ease-in-out;
}

.hero__scroll-down:hover {
  color: var(--accent-cyan);
}

@keyframes bounce-slow {

  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  40% {
    transform: translateX(-50%) translateY(-8px);
  }

  60% {
    transform: translateX(-50%) translateY(-4px);
  }
}

.section {
  padding: 6rem 0;
  position: relative;
}

.section__header {
  margin-bottom: 3.5rem;
  position: relative;
}

.section__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
  letter-spacing: 1.5px;
  margin-bottom: 0.5rem;
  padding: 0.25rem 0.75rem;
  border-radius: 99px;
  background: rgba(0, 242, 254, 0.05);
  border: 1px solid rgba(0, 242, 254, 0.15);
}

.section__tag::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

.section__title {
  font-family: 'Sora', sans-serif;
  font-size: 2.25rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.section__title-num {
  font-family: 'Fira Code', monospace;
  font-size: 1.25rem;
  color: var(--text-muted);
  font-weight: 400;
}

.section__line {
  height: 2px;
  width: 60px;
  background: var(--accent-cyan);
  margin-top: 0.75rem;
  border-radius: 2px;
}

.about__grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 3.5rem;
  align-items: center;
}

.about__portrait-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.portrait-frame {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  aspect-ratio: 4 / 5;
}

.portrait-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: grayscale(20%);
  transition: filter 0.3s ease, transform 0.3s ease;
}

.portrait-frame:hover .portrait-img {
  filter: grayscale(0%);
  transform: scale(1.03);
}

.portrait-meta {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
}

.meta-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.meta-role {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: 'Fira Code', monospace;
}

.about__heading {
  font-family: 'Sora', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  line-height: 1.4;
}

.about__paragraph {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1rem;
  line-height: 1.7;
  text-align: justify;
}

.about__highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 12px;
}

.highlight-item i {
  font-size: 1.4rem;
  color: var(--accent-cyan);
  margin-top: 2px;
}

.highlight-item strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-primary);
}

.highlight-item span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.principles__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.principle-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem 1.5rem;
  position: relative;
  transition: all 0.3s ease;
}

.principle-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
}

.principle-card__num {
  font-family: 'Fira Code', monospace;
  font-size: 0.8rem;
  color: var(--accent-cyan);
  font-weight: 700;
  margin-bottom: 1rem;
}

.principle-card__icon {
  font-size: 2rem;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
}

.principle-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.principle-card__desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline__item {
  position: relative;
  margin-bottom: 2.5rem;
}

.timeline__marker {
  position: absolute;
  left: -2rem;
  top: 1.25rem;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.timeline__card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  transition: all 0.3s ease;
}

.timeline__card:hover {
  border-color: var(--border-hover);
}

.timeline__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.timeline__badge {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--accent-cyan);
  background: var(--accent-cyan-glow);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

.timeline__gpa,
.timeline__tag {
  font-family: 'Fira Code', monospace;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.timeline__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.timeline__subtitle {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.timeline__desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.timeline__list {
  margin-top: 0.75rem;
}

.timeline__list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.timeline__list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 18px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.3s ease;
}

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

.project-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.project-card__idx {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

.project-card__actions {
  display: flex;
  gap: 0.5rem;
}

.p-action {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.p-action:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.p-action--disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.p-action--disabled:hover {
  color: var(--text-secondary);
  border-color: var(--border-color);
}

.project-card__content {
  display: flex;
  flex: 1;
  flex-direction: column;
}

.project-card__title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.project-card__desc {
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
  text-align: justify;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-card__tech span {
  font-family: 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

.certs__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  text-align: left;
  transition: all 0.25s ease;
  width: 100%;
}

.cert-card:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}

.cert-card__icon {
  font-size: 1.75rem;
  color: var(--accent-cyan);
}

.cert-card__details {
  flex: 1;
}

.cert-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}

.cert-card__issuer {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
}

.cert-card__badge {
  font-family: 'Fira Code', monospace;
  font-size: 0.7rem;
  color: var(--accent-cyan);
  background: var(--accent-cyan-glow);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

/* Certificate Modal */
.certificate-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.certificate-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.certificate-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
}

.certificate-modal__panel {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  width: 90%;
  max-width: 900px;
  height: 80vh;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.certificate-modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
  color: var(--text-primary);
  z-index: 10;
}

.certificate-modal__frame,
.certificate-modal__img {
  width: 100%;
  height: 100%;
  border-radius: 10px;
  object-fit: contain;
}

.certificate-modal__actions {
  margin-top: 1rem;
  display: flex;
  justify-content: flex-end;
}

.certificate-modal__open {
  background: var(--accent-cyan);
  color: #000;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.contact__intro {
  max-width: 600px;
  margin-bottom: 2.5rem;
}

.contact__heading {
  font-family: 'Sora', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.contact__sub {
  color: var(--text-secondary);
}

.contact__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  position: relative;
  transition: all 0.3s ease;
}

.contact-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-3px);
}

.contact-card__icon {
  font-size: 1.75rem;
  color: var(--accent-cyan);
}

.contact-card__content {
  flex: 1;

}

.contact-card__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
  font-family: 'Fira Code', monospace;
}

.contact-card__value {
  font-size: 1rem;
  color: var(--text-primary);
}

.contact-card__arrow {
  color: var(--text-muted);
  font-size: 1.25rem;
  transition: color 0.3s ease;
}

.contact-card:hover .contact-card__arrow {
  color: var(--accent-cyan);
}

.footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  background: var(--bg-primary);
}

.footer__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.footer__logo {
  font-family: 'Fira Code', monospace;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.footer__tag {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.footer__links {
  display: flex;
  gap: 1rem;
}

.footer__links a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.footer__links a:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer__sys {
  font-family: 'Fira Code', monospace;
  color: #10B981;
}

[data-anim="fade-up"],
.anim-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

[data-anim="fade-up"].is-visible,
.anim-fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Card Micro Hover Animations */
.principle-card,
.project-card,
.cert-card,
.contact-card,
.timeline__card {
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.35s ease, box-shadow 0.35s ease !important;
}

.principle-card:hover,
.project-card:hover,
.cert-card:hover,
.contact-card:hover,
.timeline__card:hover {
  transform: translateY(-6px) scale(1.015);
}

/* Scroll To Top Floating Arrow Button (Theme Responsive) */
.scroll-top-btn {
  position: fixed !important;
  bottom: 2rem !important;
  right: 2rem !important;
  width: 50px !important;
  height: 50px !important;
  border-radius: 50% !important;
  background: var(--bg-card) !important;
  border: 1px solid var(--border-hover) !important;
  color: var(--accent-cyan) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer !important;
  box-shadow: var(--shadow-lg) !important;
  backdrop-filter: blur(12px) !important;
  -webkit-backdrop-filter: blur(12px) !important;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
  z-index: 99999 !important;
  text-decoration: none !important;
}

.scroll-top-btn svg {
  width: 24px !important;
  height: 24px !important;
  stroke: var(--accent-cyan) !important;
  transition: stroke 0.3s ease !important;
}

.scroll-top-btn.is-visible {
  opacity: 1 !important;
  visibility: visible !important;
  transform: translateY(0) !important;
}

.scroll-top-btn:hover {
  background: var(--accent-cyan) !important;
  border-color: var(--accent-cyan) !important;
  transform: translateY(-4px) !important;
  box-shadow: var(--shadow-glow) !important;
}

.scroll-top-btn:hover svg {
  stroke: #FFFFFF !important;
}

:root[data-theme="light"] .scroll-top-btn:hover svg {
  stroke: #FFFFFF !important;
}

@media (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
  }

  .about__grid {
    grid-template-columns: 1fr;
  }

  .principles__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .projects__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .certs__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar.menu-open {
    top: 0;
    width: 100%;
    border-radius: 0;
    border-top: none;
    border-left: none;
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
  }

  .navbar.menu-open::before {
    display: none;
  }

  .navbar__links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    justify-content: flex-start;
    align-items: stretch;
    padding: 1rem 1.5rem 1.5rem 1.5rem;
    gap: 0.5rem;
    z-index: 999;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);

    /* Slide-down reveal animation */
    opacity: 0;
    clip-path: polygon(0 0, 100% 0, 100% 0, 0 0);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
  }

  .navbar__links.active {
    opacity: 1;
    clip-path: polygon(0 0, 100% 0, 100% 150%, 0 150%);
    pointer-events: all;
  }

  .navbar__links li {
    width: 100%;
  }

  .navbar__links .navbar__link {
    font-size: 1.15rem;
    font-weight: 600;
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-primary);
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1), background 0.2s ease;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    width: 100%;
  }

  .navbar__links .navbar__link:hover {
    background: var(--bg-card-hover);
    color: var(--accent-cyan);
  }

  .navbar__links li:last-child {
    margin-top: 0.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
  }

  .navbar__links .navbar__link--cta {
    justify-content: center !important;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-indigo) 100%) !important;
    color: #FFFFFF !important;
    border: none;
    padding: 1.15rem 1rem !important;
    box-shadow: var(--shadow-glow);
  }

  .navbar__links .navbar__link--cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(56, 189, 248, 0.3);
  }

  .navbar__links.active .navbar__link {
    opacity: 1;
    transform: translateY(0);
  }

  /* Staggered animation for each nav link */
  .navbar__links.active li:nth-child(1) .navbar__link {
    transition-delay: 0.05s;
  }

  .navbar__links.active li:nth-child(2) .navbar__link {
    transition-delay: 0.10s;
  }

  .navbar__links.active li:nth-child(3) .navbar__link {
    transition-delay: 0.15s;
  }

  .navbar__links.active li:nth-child(4) .navbar__link {
    transition-delay: 0.20s;
  }

  .navbar__links.active li:nth-child(5) .navbar__link {
    transition-delay: 0.25s;
  }

  .navbar__links.active li:nth-child(6) .navbar__link {
    transition-delay: 0.30s;
  }

  .navbar__links.active li:nth-child(7) .navbar__link {
    transition-delay: 0.35s;
  }

  .navbar__toggle {
    display: flex;
    z-index: 1000;
    position: relative;
  }

  /* Hamburger → X animation */
  .navbar__toggle.open .navbar__toggle-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .navbar__toggle.open .navbar__toggle-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }

  .navbar__toggle.open .navbar__toggle-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .navbar__toggle-bar {
    transition: transform 0.3s ease, opacity 0.2s ease;
  }

  .hero {
    padding-top: 7rem;
    padding-bottom: 3rem;
    min-height: auto;
  }

  .hero__name {
    font-size: 2.5rem;
  }

  .section {
    padding: 4rem 0;
  }

  .section__title {
    font-size: 1.85rem;
  }

  .section__header {
    margin-bottom: 2.5rem;
  }

  .principles__grid,
  .projects__grid,
  .certs__grid,
  .contact__grid {
    grid-template-columns: 1fr;
  }

  .about__highlights {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero__name {
    font-size: 2rem;
  }

  .hero__tagline {
    font-size: 0.95rem;
  }

  .hero__actions {
    flex-direction: column;
    width: 100%;
    gap: 1rem;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero__metrics {
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
  }

  .metric-sep {
    display: none;
  }

  .section__title {
    font-size: 1.5rem;
  }
}