/* ============================================================
   DESIGN SYSTEM – VARIABLES & ADDITIONS (i18n + certs)
   ============================================================ */
:root {
  --color-bg: #0a0e1a;
  --color-bg-2: #0f1525;
  --color-bg-card: #131929;
  --color-bg-card-hover: #172035;
  --color-border: rgba(27, 142, 242, 0.12);
  --color-border-hover: rgba(27, 142, 242, 0.35);

  --color-primary: #1b8ef2;
  --color-primary-dim: rgba(27, 142, 242, 0.15);
  --color-primary-glow: rgba(27, 142, 242, 0.3);
  --color-accent: #2dd8ff;
  --color-accent-2: #34d399;

  --color-text: #e2e8f0;
  --color-text-muted: #8b98b8;
  --color-text-faint: #4a5568;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'Fira Code', 'Cascadia Code', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(27, 142, 242, 0.15);
  --shadow-glow-accent: 0 0 60px rgba(45, 216, 255, 0.12);

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 3px;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 100px 0;
}

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: var(--transition);
  letter-spacing: 0.02em;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 20px var(--color-primary-glow);
}
.btn--primary:hover {
  background: #4babf8;
  box-shadow: 0 0 32px rgba(27, 142, 242, 0.45);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border-hover);
}
.btn--ghost:hover {
  background: var(--color-primary-dim);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
  margin-top: 24px;
}
.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

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

/* ============================================================
   SECTION HEADER
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header--left {
  text-align: left;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.2;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}

.nav.scrolled {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
}

.nav__container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
}
.nav__logo:hover { color: var(--color-primary); }

.nav__logo-bracket {
  color: var(--color-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width var(--transition);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-text);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__link--cta {
  padding: 8px 20px;
  border: 1.5px solid var(--color-border-hover);
  border-radius: var(--radius-sm);
  color: var(--color-primary) !important;
}
.nav__link--cta::after { display: none; }
.nav__link--cta:hover {
  background: var(--color-primary-dim);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(27, 142, 242, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 142, 242, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}

.hero__blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
}

.hero__blob--1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #1b8ef2, transparent);
  top: -150px;
  right: -100px;
  animation: float 8s ease-in-out infinite;
}

.hero__blob--2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #2dd8ff, transparent);
  bottom: -100px;
  left: -80px;
  animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -30px); }
}

.hero__container {
  position: relative;
  max-width: 780px;
  text-align: center;
  z-index: 1;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(52, 211, 153, 0.08);
  border: 1px solid rgba(52, 211, 153, 0.25);
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-accent-2);
  margin-bottom: 28px;
  transition-delay: 0.1s;
}

.hero__badge-dot {
  width: 7px;
  height: 7px;
  background: var(--color-accent-2);
  border-radius: 50%;
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero__title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 24px;
  transition-delay: 0.15s;
}

.hero__name {
  color: #ffffff;
}

.hero__title-highlight {
  color: var(--color-primary);
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 600;
  display: block;
  margin-top: 4px;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.7;
  transition-delay: 0.2s;
}

.hero__subtitle strong {
  color: var(--color-text);
}

.hero__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
  transition-delay: 0.25s;
}

.hero__stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  transition-delay: 0.3s;
  padding: 28px 40px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.hero__stat {
  text-align: center;
}

.hero__stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.hero__stat-plus {
  font-size: 1.2rem;
  color: var(--color-accent);
}

.hero__stat-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero__stat-divider {
  width: 1px;
  height: 44px;
  background: var(--color-border);
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  animation: fadeInUp 1s 1s ease both;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-text-faint), transparent);
  animation: scrollLine 2s 1.5s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(16px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ============================================================
   ABOUT
   ============================================================ */
.about {
  background: var(--color-bg-2);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  align-items: start;
}

.about__image-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.about__image-frame {
  position: relative;
  width: 220px;
  height: 220px;
}

.about__avatar {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.about__image-decoration {
  position: absolute;
  inset: -8px;
  border-radius: calc(var(--radius-xl) + 8px);
  border: 2px solid var(--color-border-hover);
  z-index: 0;
}

.about__avatar--photo {
  padding: 0;
  background: none;
  overflow: hidden;
}

.about__avatar--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius-xl);
  display: block;
}

.about__tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.tech-pill {
  padding: 5px 14px;
  background: var(--color-primary-dim);
  border: 1px solid var(--color-border-hover);
  border-radius: 100px;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--color-primary);
}

.about__content {
  transition-delay: 0.15s;
}

.about__text {
  color: var(--color-text-muted);
  margin-bottom: 18px;
  font-size: 1rem;
  line-height: 1.8;
}

.about__text strong {
  color: var(--color-text);
}

.about__facts {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about__fact {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.about__fact-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
}

.skill-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.skill-card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.skill-card:hover::before {
  opacity: 1;
}

.skill-card:nth-child(2) { transition-delay: 0.1s; }
.skill-card:nth-child(3) { transition-delay: 0.2s; }
.skill-card:nth-child(4) { transition-delay: 0.3s; }

.skill-card__icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.skill-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
}

.skill-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.skill-card__list li {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  padding-left: 14px;
  position: relative;
}

.skill-card__list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-size: 0.75rem;
}

/* ============================================================
   EXPERIENCE / TIMELINE
   ============================================================ */
.experience {
  background: var(--color-bg-2);
}

.timeline {
  position: relative;
  padding-left: 48px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent), transparent);
}

.timeline__item {
  position: relative;
  margin-bottom: 48px;
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__marker {
  position: absolute;
  left: -44px;
  top: 20px;
}

.timeline__dot {
  width: 16px;
  height: 16px;
  background: var(--color-bg-2);
  border: 2.5px solid var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--color-primary-glow);
  transition: var(--transition);
}

.timeline__item:hover .timeline__dot {
  background: var(--color-primary);
  transform: scale(1.2);
}

.timeline__card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  transition: var(--transition);
}

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

/* Collapsible toggle button */
.timeline__toggle {
  display: block;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-align: left;
  color: inherit;
}

.timeline__toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 4px;
  border-radius: var(--radius-md);
}

.timeline__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.timeline__header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.timeline__chevron {
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  transition: transform 0.3s ease, color 0.2s ease;
  flex-shrink: 0;
}

.timeline__toggle[aria-expanded="false"] .timeline__chevron {
  transform: rotate(-90deg);
}

.timeline__toggle:hover .timeline__chevron {
  color: var(--color-primary);
}

/* Collapsible body */
.timeline__body {
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.timeline__body-inner {
  padding-top: 20px;
}

.timeline__role {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.timeline__company {
  font-size: 0.875rem;
  color: var(--color-primary);
}

.timeline__period {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  white-space: nowrap;
  padding: 4px 12px;
  background: var(--color-primary-dim);
  border-radius: 100px;
  border: 1px solid var(--color-border-hover);
}

.timeline__achievements {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.timeline__achievements li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding-left: 18px;
  position: relative;
  line-height: 1.6;
}

.timeline__achievements li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent-2);
}

.timeline__achievements strong {
  color: var(--color-text);
}

.timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.timeline__tags span {
  padding: 4px 12px;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.project-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.project-card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.project-card--featured {
  grid-column: span 1;
  background: linear-gradient(135deg, rgba(27, 142, 242, 0.06), rgba(45, 216, 255, 0.04));
  border-color: rgba(27, 142, 242, 0.25);
}

.project-card--featured:hover {
  box-shadow: var(--shadow-card), var(--shadow-glow), var(--shadow-glow-accent);
}

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

.project-card__label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  padding: 5px 14px;
  border-radius: 100px;
  box-shadow: 0 0 14px var(--color-primary-glow);
}

.project-card__label::before {
  content: '★';
  font-size: 0.65rem;
}

.project-card__links {
  display: flex;
  gap: 12px;
  margin-left: auto;
}

.project-card__links a {
  color: var(--color-text-muted);
  transition: color var(--transition);
  display: flex;
  align-items: center;
}

.project-card__links a:hover {
  color: var(--color-primary);
}

.project-card__links svg {
  width: 20px;
  height: 20px;
}

.project-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
}

.project-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.project-card__tech span {
  padding: 4px 12px;
  background: var(--color-bg-2);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-primary);
}

.project-card:nth-child(2) { transition-delay: 0.1s; }
.project-card:nth-child(3) { transition-delay: 0.15s; }
.project-card:nth-child(4) { transition-delay: 0.2s; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact {
  background: var(--color-bg-2);
}

.contact__inner {
  max-width: 920px;
  margin: 0 auto;
}

.contact__text {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  margin-bottom: 48px;
  line-height: 1.7;
}

.contact__channels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 680px;
}

/* Form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 13px 16px;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-text-faint);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}

/* Contact info — kept for future use if form is re-enabled */
.contact__info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact__link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.contact__link:hover {
  border-color: var(--color-primary);
  background: var(--color-bg-card-hover);
  transform: translateX(4px);
}

.contact__link-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-dim);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.contact__link-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--color-primary);
}

.contact__link-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.contact__link-value {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text);
  font-weight: 500;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer__copy {
  font-size: 0.82rem;
  color: var(--color-text-faint);
}

.footer__top {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer__top:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .about__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .about__image-wrapper {
    flex-direction: row;
    gap: 24px;
    align-items: center;
  }
  .projects__grid {
    grid-template-columns: 1fr;
  }
  .contact__channels {
    grid-template-columns: 1fr;
  }
  .hero__stats {
    gap: 20px;
    padding: 20px 24px;
  }
}

@media (max-width: 768px) {
  section {
    padding: 72px 0;
  }
  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg-2);
    border-left: 1px solid var(--color-border);
    padding: 80px 32px 32px;
    transition: right var(--transition-slow);
    z-index: 999;
    align-items: flex-start;
  }
  .nav__links.open {
    right: 0;
  }
  .nav__links li {
    width: 100%;
  }
  .nav__link {
    display: block;
    padding: 14px 0;
    font-size: 1rem;
    border-bottom: 1px solid var(--color-border);
  }
  .nav__link--cta {
    margin-top: 16px;
    border: 1.5px solid var(--color-border-hover) !important;
    border-radius: var(--radius-sm) !important;
    text-align: center;
  }
  .nav__toggle {
    display: flex;
    z-index: 1001;
  }
  .nav__toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav__toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav__toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
  .timeline {
    padding-left: 32px;
  }
  .timeline__header {
    flex-direction: column;
  }
  .about__image-wrapper {
    flex-direction: column;
  }
  .hero__stat-divider {
    display: none;
  }
  .hero__stats {
    gap: 16px;
  }
  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero {
    padding: 100px 16px 72px;
  }
  .hero__stats {
    flex-direction: column;
    gap: 20px;
  }
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }
  .btn {
    width: 100%;
    justify-content: center;
  }
  .timeline__card {
    padding: 20px;
  }
}

/* ============================================================
   NAV RIGHT AREA (lang switcher + hamburger)
   ============================================================ */
.nav__right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ============================================================
   LANGUAGE SWITCHER
   ============================================================ */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  transition: var(--transition);
  user-select: none;
}

.lang-switcher:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.lang-current {
  color: var(--color-primary);
  font-weight: 600;
}

.lang-divider {
  color: var(--color-text-faint);
  font-size: 0.7rem;
}

.lang-alt {
  color: var(--color-text-muted);
}

/* ============================================================
   EXPERIENCE — TAB SWITCHER
   ============================================================ */
.exp-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 44px;
}

.exp-tabs {
  display: inline-flex;
  gap: 4px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 4px;
}

.exp-toggle-all {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.exp-toggle-all svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.exp-toggle-all:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-dim);
}

.exp-toggle-all--collapsed svg {
  transform: rotate(-180deg);
}

.exp-tab {
  padding: 10px 28px;
  border: none;
  border-radius: calc(var(--radius-md) - 4px);
  background: transparent;
  color: var(--color-text-muted);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.exp-tab:hover:not(.exp-tab--active) {
  color: var(--color-text);
  background: rgba(27, 142, 242, 0.06);
}

.exp-tab--active {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 18px var(--color-primary-glow);
}

/* ============================================================
   TIMELINE — location sub-label
   ============================================================ */
.timeline__location {
  color: var(--color-text-faint);
  font-size: 0.8rem;
  font-weight: 400;
}

/* ============================================================
   CERTIFICATIONS & EDUCATION SECTION
   ============================================================ */
.certs-section {
  background: var(--color-bg-2);
}

.certs-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 60px;
  align-items: start;
}

.certs-col__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-family: var(--font-mono);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

/* Education card */
.edu-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 24px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.edu-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-card);
}

.edu-card__icon {
  font-size: 2rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.edu-card__degree {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
}

.edu-card__school {
  font-size: 0.875rem;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.edu-card__detail {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.edu-card__period {
  display: inline-block;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  background: var(--color-primary-dim);
  border: 1px solid var(--color-border-hover);
  border-radius: 100px;
  padding: 3px 10px;
}

/* Cert grid */
.cert-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.cert-card:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-card-hover);
  transform: translateX(4px);
}

.cert-card__icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cert-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
  padding: 4px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

.cert-card__name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 3px;
}

.cert-card__meta {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
}

/* Responsive certs */
@media (max-width: 900px) {
  .certs-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ============================================================
   ABOUT — facts with HTML content
   ============================================================ */
.about__fact {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  line-height: 1.5;
}

.about__fact:last-child {
  border-bottom: none;
}