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

/* ---- DARK THEME (default) ---- */
:root,
html[data-theme="dark"] {
  --bg:        #08101c;
  --bg-2:      #0c1526;
  --bg-card:   #111f32;
  --bg-card-2: #172840;
  --border:    rgba(255, 255, 255, 0.07);
  --border-2:  rgba(255, 255, 255, 0.12);

  --accent:      #2563eb;
  --accent-2:    #60a5fa;
  --accent-glow: rgba(37, 99, 235, 0.25);

  --text-1:   #ecf2ff;
  --text-2:   #8baabe;
  --text-3:   #4c6880;

  --nav-bg:        rgba(8, 16, 28, 0.85);
  --nav-mobile-bg: rgba(8, 16, 28, 0.97);
  --shadow-card:   0 8px 40px rgba(0, 0, 0, 0.3);
  --shadow-photo:  0 24px 64px rgba(0, 0, 0, 0.5);

  --font:      'Inter', -apple-system, sans-serif;
  --mono:      'JetBrains Mono', 'Fira Code', monospace;

  --radius:    12px;
  --radius-sm: 8px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- LIGHT THEME ---- */
html[data-theme="light"] {
  --bg:        #f0f5ff;
  --bg-2:      #e4edf8;
  --bg-card:   #ffffff;
  --bg-card-2: #eef4ff;
  --border:    rgba(0, 10, 40, 0.08);
  --border-2:  rgba(0, 10, 40, 0.15);

  --accent:      #2563eb;
  --accent-2:    #1d4ed8;
  --accent-glow: rgba(37, 99, 235, 0.15);

  --text-1:   #08142a;
  --text-2:   #2e4462;
  --text-3:   #5e78a0;

  --nav-bg:        rgba(240, 245, 255, 0.88);
  --nav-mobile-bg: rgba(240, 245, 255, 0.98);
  --shadow-card:   0 8px 40px rgba(0, 0, 0, 0.08);
  --shadow-photo:  0 24px 64px rgba(0, 0, 0, 0.14);
}

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

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text-1);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: #fff;
}

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

ul {
  list-style: none;
}

strong {
  color: var(--text-1);
  font-weight: 600;
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* ============================================
   CONTAINER
   ============================================ */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ============================================
   NAVBAR
   ============================================ */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  transition: background var(--transition), backdrop-filter var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-color: var(--border);
}

.nav-inner {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent-2);
  letter-spacing: 0.05em;
  padding: 6px 12px;
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.nav-logo:hover {
  border-color: var(--accent);
  color: var(--accent-2);
  box-shadow: 0 0 16px var(--accent-glow);
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-2);
  font-weight: 400;
  letter-spacing: 0.01em;
  position: relative;
  transition: color var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-articles-link {
  color: var(--accent-2) !important;
  font-weight: 500 !important;
}

.nav-links a:hover {
  color: var(--text-1);
}

.nav-links a:hover::after {
  width: 100%;
}

/* ============================================
   LANGUAGE SWITCHER
   ============================================ */
.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-switcher {
  position: relative;
}

.lang-trigger {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  background: transparent;
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: 5px 10px;
  cursor: pointer;
  color: var(--text-2);
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: all var(--transition);
  height: 34px;
}

.lang-trigger:hover {
  border-color: var(--accent);
  color: var(--text-1);
  box-shadow: 0 0 12px var(--accent-glow);
}

.lang-flag {
  width: 18px !important;
  height: 13px !important;
  border-radius: 2px;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.4);
}

.lang-code {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
}

.lang-chevron {
  width: 11px;
  height: 11px;
  color: var(--text-3);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.lang-trigger[aria-expanded="true"] .lang-chevron {
  transform: rotate(180deg);
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  overflow: hidden;
  min-width: 148px;
  opacity: 0;
  transform: translateY(-6px) scale(0.97);
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  z-index: 200;
}

.lang-dropdown.open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  padding: 0.6rem 1rem;
  background: transparent;
  border: none;
  color: var(--text-2);
  font-family: var(--font);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.lang-option:last-child {
  border-bottom: none;
}

.lang-option:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-1);
}

.lang-option.active {
  color: var(--accent-2);
  background: rgba(37, 99, 235, 0.08);
}

.lang-option .fi {
  width: 20px !important;
  height: 15px !important;
  border-radius: 2px;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.35);
}

/* ============================================
   NAV HAMBURGER
   ============================================ */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-2);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================
   TYPEWRITER
   ============================================ */
@keyframes twBlink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes twFadeOut {
  to { opacity: 0; }
}

.tw-cursor {
  display: inline-block;
  color: var(--accent-2);
  font-weight: 300;
  margin-left: 2px;
  animation: twBlink 0.65s step-end infinite;
  user-select: none;
}

.tw-cursor.tw-done {
  animation: twFadeOut 0.8s ease 2s forwards;
}

.tw-accent {
  color: var(--accent-2);
}

/* ============================================
   HERO
   ============================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, black 30%, transparent 100%);
  opacity: 0.4;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 8rem 2rem 4rem;
}

.hero-tag {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent-2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: fadeUp 0.8s ease 0.1s both;
}

.hero-tag::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--accent);
}

.hero-name {
  font-size: clamp(3.5rem, 9vw, 8rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin-bottom: 1.75rem;
  animation: fadeUp 0.8s ease 0.2s both;
}

.hero-name .tw-accent {
  color: var(--accent-2);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--text-2);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 2.5rem;
  animation: fadeUp 0.8s ease 0.3s both;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  animation: fadeUp 0.8s ease 0.4s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  box-shadow: 0 0 32px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border-2);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--text-1);
  transform: translateY(-2px);
}

.hero-scroll {
  margin-top: 2.5rem;
  animation: fadeUp 0.8s ease 0.5s both;
}

.hero-scroll span {
  display: block;
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollBounce 2s ease infinite;
}

/* ============================================
   SECTION COMMON
   ============================================ */
section {
  padding: 7rem 0;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent-2);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4rem;
}

/* ============================================
   ABOUT
   ============================================ */
#about {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 5rem;
  align-items: center;
}

.about-text h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  line-height: 1.2;
}

.about-text h2 span {
  color: var(--accent-2);
}

.about-text p {
  color: var(--text-2);
  margin-bottom: 1rem;
  font-size: 0.975rem;
  line-height: 1.8;
}

/* ============================================
   ABOUT — PHOTO
   ============================================ */
.about-photo {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

/* Concentric rings — centred on the circle */
.photo-rings {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 420px;
  height: 420px;
  border-radius: 50%;
  border: 1px solid rgba(37, 99, 235, 0.12);
  pointer-events: none;
  z-index: 0;
}

.photo-rings::before {
  content: '';
  position: absolute;
  inset: 40px;
  border-radius: 50%;
  border: 1px solid rgba(37, 99, 235, 0.07);
}

.photo-rings::after {
  content: '';
  position: absolute;
  inset: 80px;
  border-radius: 50%;
  border: 1px solid rgba(37, 99, 235, 0.04);
}

/* Soft indigo bloom below the circle */
.photo-glow {
  position: absolute;
  bottom: -1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 280px;
  height: 140px;
  background: radial-gradient(ellipse at 50% 100%, rgba(37, 99, 235, 0.4) 0%, transparent 70%);
  filter: blur(28px);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

/* Decorative dot grid — top-right */
.photo-dots {
  position: absolute;
  top: -1rem;
  right: -1rem;
  width: 120px;
  height: 120px;
  background-image: radial-gradient(circle, rgba(96, 165, 250, 0.3) 1.5px, transparent 1.5px);
  background-size: 14px 14px;
  pointer-events: none;
  z-index: 0;
  mask-image: radial-gradient(ellipse at 100% 0%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 100% 0%, black 30%, transparent 75%);
}

/* Circular photo container */
.photo-circle {
  position: relative;
  z-index: 2;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid rgba(37, 99, 235, 0.3);
  box-shadow:
    0 0 0 6px rgba(37, 99, 235, 0.07),
    0 0 0 14px rgba(37, 99, 235, 0.04),
    var(--shadow-photo);
  flex-shrink: 0;
}

.photo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 12%;
  display: block;
}

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

.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 220px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--border-2) 10%, var(--border-2) 90%, transparent);
}

.timeline-item {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 216px;
  top: 1.5rem;
  width: 9px;
  height: 9px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--bg), 0 0 12px var(--accent-glow);
}

.timeline-meta {
  padding-top: 1.5rem;
  text-align: right;
  padding-right: 0.5rem;
}

.timeline-period {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent-2);
  margin-bottom: 0.25rem;
}

.timeline-location {
  display: block;
  font-size: 0.75rem;
  color: var(--text-3);
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 2rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.timeline-card:hover {
  border-color: var(--border-2);
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.timeline-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.timeline-header h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

/* Company info row (logo + name) */
.tl-company-info {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  min-width: 0;
}

/* Square icon logos (Itaú, PAN) */
.company-logo {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

/* Horizontal wordmark logos (Resource) */
.company-logo-wide {
  width: auto;
  height: 38px;
  max-width: 110px;
  object-fit: contain;
  border-radius: 8px;
  padding: 5px 10px;
  background: white;
  border: 1px solid rgba(0, 0, 20, 0.1) !important;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08) !important;
}

.timeline-company {
  display: block;
  font-size: 0.875rem;
  color: var(--accent-2);
  font-weight: 500;
}

/* Company sub-label (for unified entries) */
.timeline-company-sub {
  display: block;
  font-size: 0.75rem;
  font-family: var(--mono);
  color: var(--text-3);
  margin-top: 0.2rem;
  letter-spacing: 0.01em;
}

/* ---- Career progression inside a card ---- */
.role-progression {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin: 1.5rem 0 1.25rem;
  padding-left: 1.5rem;
  border-left: 1px solid var(--border-2);
}

.role-step {
  position: relative;
}

.role-step-dot {
  position: absolute;
  left: -1.65rem;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 2px solid var(--border-2);
  background: var(--bg-card);
  transition: border-color var(--transition);
}

.role-current .role-step-dot {
  border-color: var(--accent);
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15), 0 0 10px var(--accent-glow);
}

.role-step-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.5rem;
}

.role-step-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-1);
}

.role-current .role-step-title {
  color: var(--accent-2);
}

.role-step-period {
  font-size: 0.7rem;
  font-family: var(--mono);
  color: var(--text-3);
  white-space: nowrap;
  flex-shrink: 0;
}

.role-current .role-step-period {
  color: var(--accent-2);
}

.timeline-tag {
  font-size: 0.7rem;
  font-family: var(--mono);
  color: var(--text-3);
  border: 1px solid var(--border-2);
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
  flex-shrink: 0;
}

.timeline-card p {
  color: var(--text-2);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.timeline-card ul {
  margin-bottom: 1rem;
  padding-left: 0;
}

.timeline-card ul li {
  color: var(--text-2);
  font-size: 0.875rem;
  line-height: 1.6;
  padding-left: 1.25rem;
  position: relative;
  margin-bottom: 0.4rem;
}

.timeline-card ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
  top: 0.05em;
}

.timeline-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.timeline-tech span {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent-2);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 3px 10px;
  border-radius: 20px;
}

/* ============================================
   SKILLS — TECH CATEGORIES
   ============================================ */
#skills {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.tech-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 3.5rem;
}

.tech-cat-label {
  font-size: 0.7rem;
  font-family: var(--mono);
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.tech-cat-label::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 13px;
  background: var(--accent);
  border-radius: 2px;
  flex-shrink: 0;
}

.tech-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.tech-card {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 0.3rem 0.75rem;
  cursor: default;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.tech-card:hover {
  border-color: rgba(37, 99, 235, 0.35);
  background: rgba(37, 99, 235, 0.06);
}

.tech-card i {
  font-size: 0.95rem;
  line-height: 1;
  flex-shrink: 0;
}

.tech-card span {
  font-size: 0.8rem;
  color: var(--text-2);
  white-space: nowrap;
  transition: color var(--transition);
}

.tech-card:hover span { color: var(--text-1); }

/* AI tool icon inside pill */
.ai-icon {
  width: 1rem;
  height: 1rem;
  border-radius: 3px;
  background: var(--ic, #2563eb);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
}

.ai-icon svg {
  width: 10px;
  height: 10px;
}

/* ============================================
   SKILLS — EXPERTISE CARDS
   ============================================ */
.expertise-block {
  padding-top: 3rem;
  border-top: 1px solid var(--border);
}

.expertise-header {
  margin-bottom: 1.75rem;
}

.expertise-header h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-1);
}

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

.exp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.exp-card:hover {
  border-color: rgba(37, 99, 235, 0.4);
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.14);
}

.exp-card-header {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.exp-card-icon {
  width: 40px;
  height: 40px;
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(37, 99, 235, 0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-2);
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
}

.exp-card:hover .exp-card-icon {
  background: rgba(37, 99, 235, 0.18);
  border-color: rgba(37, 99, 235, 0.4);
}

.exp-card-icon svg {
  width: 18px;
  height: 18px;
}

.exp-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.3;
}

.exp-card ul {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.exp-card ul li {
  font-size: 0.8rem;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  line-height: 1.4;
}

.exp-card ul li::before {
  content: '';
  display: block;
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  opacity: 0.7;
}

/* Spoken Languages */
.spoken-langs {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.spoken-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.spoken-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color var(--transition), transform var(--transition);
}

.spoken-card:hover {
  border-color: rgba(37, 99, 235, 0.35);
  transform: translateY(-2px);
}

.spoken-flag {
  width: 28px !important;
  height: 21px !important;
  border-radius: 3px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
  flex-shrink: 0;
}

.spoken-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.spoken-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1;
}

.spoken-level {
  font-size: 0.72rem;
  font-family: var(--mono);
  color: var(--text-3);
  letter-spacing: 0.03em;
}

.spoken-dots {
  display: flex;
  gap: 5px;
  align-items: center;
  margin-left: 0.5rem;
}

.sdot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--border-2);
  transition: background var(--transition);
}

.sdot.filled {
  background: var(--accent);
  border-color: var(--accent);
}

/* ============================================
   EDUCATION & CERTIFICATIONS
   ============================================ */
#education { background: var(--bg); }

.edu-sections {
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
}

/* Sub-section header */
.edu-sub-header { margin-bottom: 1.25rem; }

.edu-sub-label {
  font-size: 0.68rem;
  font-family: var(--mono);
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

/* Formation table */
.edu-table {}

.edu-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 1.5rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
}
.edu-row:first-child { border-top: none; }

.edu-row-year {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent-2);
  padding-top: 0.2rem;
  line-height: 1.4;
}

.edu-row-top {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex-wrap: wrap;
  margin-bottom: 0.3rem;
}

.edu-row-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.3;
}

.edu-type-badge {
  font-size: 0.62rem;
  font-family: var(--mono);
  color: var(--text-3);
  background: var(--bg-card);
  border: 1px solid var(--border-2);
  padding: 2px 8px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.edu-row-meta {
  font-size: 0.7rem;
  color: var(--text-3);
  font-family: var(--mono);
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.edu-logo-sm {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  object-fit: cover;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

/* Certification grid */
.certs-new {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.625rem;
}

.cert-card {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.75rem 0.875rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.cert-card:hover {
  border-color: var(--border-2);
  transform: translateX(3px);
  box-shadow: var(--shadow-card);
}

.cert-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cert-icon i   { font-size: 1.35rem; line-height: 1; }
.cert-icon svg { width: 20px; height: 20px; }

.cert-card-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.cert-card-issuer {
  font-size: 0.65rem;
  font-family: var(--mono);
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.cert-card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.3;
}

.cert-card-arrow {
  width: 14px;
  height: 14px;
  color: var(--text-3);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition), transform var(--transition), color var(--transition);
}
.cert-card:hover .cert-card-arrow {
  opacity: 1;
  transform: translate(2px, -2px);
  color: var(--accent-2);
}

/* keep old body h4 for compat if needed */
.cert-new-body h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.3;
}

/* ============================================
   CONTACT
   ============================================ */
#contact {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}

.contact-inner {
  max-width: 640px;
}

.contact-inner h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 1rem 0 1.25rem;
  line-height: 1.15;
}

.contact-inner h2 span {
  color: var(--accent-2);
}

.contact-inner > p {
  color: var(--text-2);
  font-size: 1rem;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-2);
  font-size: 0.95rem;
  padding: 1rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  width: fit-content;
}

.contact-item svg {
  width: 18px;
  height: 18px;
  color: var(--accent-2);
  flex-shrink: 0;
}

.contact-item:hover {
  border-color: var(--accent);
  color: var(--text-1);
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateX(4px);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

footer p {
  font-size: 0.8rem;
  color: var(--text-3);
  font-family: var(--mono);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .about-photo {
    min-height: 320px;
    order: -1;
  }

  .photo-circle {
    width: 260px;
    height: 260px;
  }

  .photo-rings {
    width: 320px;
    height: 320px;
  }

  .tech-categories {
    grid-template-columns: 1fr;
  }

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

  .edu-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .timeline::before {
    left: 0;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.75rem;
    padding-left: 1.5rem;
  }

  .timeline-item::before {
    left: -4px;
    top: 0.5rem;
  }

  .timeline-meta {
    text-align: left;
    padding-top: 0;
    padding-left: 0;
    display: flex;
    gap: 1rem;
    align-items: center;
  }
}

@media (max-width: 640px) {
  section {
    padding: 5rem 0;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--nav-mobile-bg);
    backdrop-filter: blur(16px);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--border);
  }

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

  .nav-links li a {
    display: block;
    padding: 1rem 2rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-hamburger.open span:nth-child(2) {
    opacity: 0;
  }
  .nav-hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .expertise-cards {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
  }

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

/* ============================================
   THEME TOGGLE BUTTON
   ============================================ */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: transparent;
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-2);
  transition: border-color var(--transition), color var(--transition), box-shadow var(--transition);
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent-2);
  box-shadow: 0 0 12px var(--accent-glow);
}

.theme-toggle svg {
  width: 15px;
  height: 15px;
  display: block;
}

/* dark mode → show sun (switch to light) */
html[data-theme="dark"]  .icon-moon { display: none; }
html[data-theme="dark"]  .icon-sun  { display: block; }

/* light mode → show moon (switch to dark) */
html[data-theme="light"] .icon-sun  { display: none; }
html[data-theme="light"] .icon-moon { display: block; }

/* ============================================
   SMOOTH THEME TRANSITION
   ============================================ */
html.theme-switching,
html.theme-switching *,
html.theme-switching *::before,
html.theme-switching *::after {
  transition:
    background-color 0.35s ease,
    border-color     0.35s ease,
    color            0.35s ease,
    box-shadow       0.35s ease !important;
}

/* ============================================
   LIGHT MODE — SPECIFIC OVERRIDES
   ============================================ */
html[data-theme="light"] .lang-option:hover {
  background: rgba(0, 0, 0, 0.04);
}

html[data-theme="light"] ::-webkit-scrollbar-track {
  background: var(--bg-2);
}

html[data-theme="light"] .timeline-card {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

html[data-theme="light"] .hero-name .tw-accent {
  color: var(--accent-2);
}