/* =============================================
   PORTFOLIO — style.css
   ============================================= */

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

/* ── LIGHT THEME (default) ── */
:root {
  --bg:           #E0F2FE;
  --surface:      #FFFFFF;
  --ink:          #1E293B;
  --ink-muted:    #64748B;
  --ink-faint:    #94A3B8;
  --accent:       #3B82F6;
  --accent-light: #DBEAFE;
  --border:       rgba(59,130,246,0.10);
  --nav-bg:       rgba(224,242,254,0.95);
  --serif:        'DM Serif Display', Georgia, serif;
  --sans:         'DM Sans', system-ui, sans-serif;
  --radius:       14px;
  --max:          900px;
  --transition:   background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* ── DARK THEME ── */
[data-theme="dark"] {
  --bg:           #0F172A;
  --surface:      #1E293B;
  --ink:          #F1F5F9;
  --ink-muted:    #CBD5E1;
  --ink-faint:    #64748B;
  --accent:       #60A5FA;
  --accent-light: #1E40AF;
  --border:       rgba(96,165,250,0.15);
  --nav-bg:       rgba(15,23,42,0.95);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
  transition: var(--transition);
}

/* =============================================
   NAV
   ============================================= */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem; height: 60px;
  transition: var(--transition);
}

.nav-logo {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: color 0.2s;
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-profile-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
  transition: transform 0.2s;
}

.nav-logo:hover .nav-profile-img {
  transform: scale(1.1);
}

.nav-right {
  display: flex; align-items: center; gap: 1rem;
}

.language-switcher {
  display: flex;
  align-items: center;
}

.language-select {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.language-select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav-links { display: flex; gap: 2rem; list-style: none; }

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-muted);
  text-decoration: none;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }

/* ── THEME TOGGLE BUTTON ── */
.theme-toggle {
  width: 44px; height: 24px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 100px;
  cursor: pointer;
  position: relative;
  transition: background 0.3s;
  flex-shrink: 0;
  padding: 0;
  outline: none;
}
.theme-toggle:focus-visible {
  box-shadow: 0 0 0 3px var(--accent);
}
.theme-toggle .toggle-thumb {
  position: absolute;
  top: 3px; left: 3px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--ink-muted);
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), background 0.3s;
}
[data-theme="dark"] .theme-toggle .toggle-thumb {
  transform: translateX(20px);
  background: var(--accent);
}
.theme-toggle .toggle-icon {
  position: absolute;
  top: 50%; font-size: 10px;
  line-height: 1;
  transform: translateY(-50%);
  user-select: none;
  pointer-events: none;
}
.toggle-icon.sun  { left:  5px; }
.toggle-icon.moon { right: 5px; }

/* =============================================
   HERO
   ============================================= */
#hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 120px 2rem 80px;
  position: relative;
  overflow: hidden;
}

.hero-badge {
  display: inline-block;
  font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 6px 16px; border-radius: 100px;
  margin-bottom: 1.5rem;
  transition: var(--transition);
}

/* ── TYPEWRITER NAME ── */
.hero-name {
  font-family: var(--serif);
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: baseline;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25em;
}

.hero-name .static-word {
  display: inline-block;
}

.typewriter-wrap {
  display: inline-flex;
  align-items: baseline;
  position: relative;
}

.typewriter-text {
  font-style: italic;
  color: var(--accent);
  white-space: nowrap;
  overflow: hidden;
  display: inline-block;
}

/* blinking cursor */
.typewriter-cursor {
  display: inline-block;
  width: 3px;
  height: 0.85em;
  background: var(--accent);
  margin-left: 3px;
  vertical-align: baseline;
  position: relative;
  top: 0.05em;
  animation: blink 0.75s step-end infinite;
  flex-shrink: 0;
}

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

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--ink-muted);
  max-width: 480px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
}

.hero-cta {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: var(--bg);
  text-decoration: none;
  font-size: 0.9rem; font-weight: 500;
  padding: 14px 28px; border-radius: 100px;
  transition: background 0.2s, transform 0.15s, color 0.2s;
}
.hero-cta:hover { background: var(--accent); transform: translateY(-2px); color: #fff; }

.hero-scroll {
  position: absolute; bottom: 2.5rem; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 0.75rem; color: var(--ink-faint); letter-spacing: 0.05em;
  text-transform: uppercase; text-decoration: none;
  animation: bob 2.5s ease-in-out infinite;
}
.hero-scroll::after {
  content: ''; display: block;
  width: 1px; height: 36px;
  background: var(--ink-faint);
}
@keyframes bob {
  0%,100% { transform: translateX(-50%) translateY(0);   }
  50%     { transform: translateX(-50%) translateY(6px);  }
}

/* =============================================
   SHARED SECTION STYLES
   ============================================= */
section { max-width: var(--max); margin: 0 auto; padding: 6rem 2rem; }

.section-label {
  font-size: 0.75rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1; letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 1.5rem;
}

.divider {
  border: none;
  border-top: 1px solid var(--border);
  max-width: var(--max); margin: 0 auto;
}

/* =============================================
   ABOUT
   ============================================= */
#about .about-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem; align-items: start;
}

.about-avatar {
  aspect-ratio: auto;
  background: transparent;
  border-radius: 0;
  border: none;
  overflow: visible;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  transition: var(--transition);
}

.avatar-placeholder {
  width: 100%;
  height: 100%;
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  flex-shrink: 0;
}

.avatar-initials {
  font-family: var(--serif);
  font-size: 4rem; color: var(--ink-faint);
  letter-spacing: -0.04em;
}

.about-avatar-header {
  display: flex;
  align-items: center;
  gap: 2rem;
  width: 100%;
}

.about-avatar-header .avatar-placeholder {
  flex-shrink: 0;
  width: 280px;
  height: 280px;
  min-height: unset;
}

.avatar-name {
  flex: 1;
}

.avatar-name h3 {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--ink);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0;
}

.about-body p { color: var(--ink-muted); margin-bottom: 1.25rem; font-size: 1.05rem; }
.about-body p:last-child { margin-bottom: 0; }

.skills-row {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 2rem;
}

.skill-tag {
  font-size: 0.82rem; font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 100px;
  color: var(--ink-muted);
  transition: var(--transition);
}

/* =============================================
   WORK
   ============================================= */
#work {
  background: var(--surface);
  max-width: 100%; padding: 6rem 0;
  transition: var(--transition);
}
#work .inner { max-width: var(--max); margin: 0 auto; padding: 0 2rem; }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.project-card {
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 2rem;
  transition: transform 0.2s, box-shadow 0.2s, background 0.3s, border-color 0.3s;
  cursor: pointer;
  text-decoration: none; color: inherit; display: block;
}
.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
}

.project-icon {
  width: 48px; height: 48px;
  background: var(--accent-light);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 1.25rem;
  transition: var(--transition);
}

.project-type {
  font-size: 0.73rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: 0.5rem;
}

.project-name {
  font-family: var(--serif);
  font-size: 1.3rem; color: var(--ink);
  margin-bottom: 0.75rem; line-height: 1.2;
}

.project-desc { font-size: 0.9rem; color: var(--ink-muted); line-height: 1.6; }

.project-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 1.25rem;
  font-size: 0.82rem; font-weight: 500;
  color: var(--accent); text-decoration: none;
}
.project-link::after { content: '→'; transition: transform 0.15s; }
.project-link:hover::after { transform: translateX(4px); }

/* =============================================
   EXPERIENCE
   ============================================= */
#experience .timeline { margin-top: 3rem; }

.timeline-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
  position: relative;
}

.timeline-item:not(:last-child)::after {
  content: '';
  position: absolute; left: 159px; top: 0; bottom: 0;
  width: 1px; background: var(--border);
  transition: background 0.3s;
}

.timeline-date {
  font-size: 0.82rem; color: var(--ink-faint);
  padding-top: 4px; font-weight: 500;
}

.timeline-role {
  font-family: var(--serif);
  font-size: 1.1rem; margin-bottom: 0.25rem;
  color: var(--ink);
}

.timeline-company {
  font-size: 0.85rem; color: var(--accent);
  font-weight: 500; margin-bottom: 0.75rem;
}

.timeline-detail { font-size: 0.9rem; color: var(--ink-muted); }

/* =============================================
   CONTACT
   ============================================= */
#contact {
  text-align: center;
  background: var(--ink);
  color: var(--bg);
  max-width: 100%; padding: 7rem 2rem;
  transition: var(--transition);
}
#contact .inner { max-width: var(--max); margin: 0 auto; }
#contact .section-label { color: var(--ink-faint); }
#contact .section-title { color: var(--bg); }
#contact p { color: var(--ink-muted); font-size: 1.05rem; max-width: 440px; margin: 0 auto 2.5rem; }

.contact-email {
  display: inline-block;
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--bg); text-decoration: none;
  border-bottom: 1.5px solid rgba(255,255,255,0.25);
  padding-bottom: 4px;
  transition: border-color 0.2s, color 0.2s;
}
.contact-email:hover { border-color: var(--accent); color: var(--accent); }

.contact-methods {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.contact-phone {
  display: inline-block;
  font-family: var(--serif);
  font-size: clamp(1rem, 2vw, 1.5rem);
  color: var(--bg);
  text-decoration: none;
  border-bottom: 1.5px solid rgba(255,255,255,0.25);
  padding-bottom: 4px;
  transition: border-color 0.2s, color 0.2s;
}
.contact-phone:hover { border-color: var(--accent); color: var(--accent); }

.social-row {
  display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap;
}

.social-link {
  font-size: 0.82rem; font-weight: 500;
  letter-spacing: 0.05em; text-transform: uppercase;
  color: var(--ink-faint); text-decoration: none;
  transition: color 0.2s;
}
.social-link:hover { color: var(--bg); }

/* =============================================
   FOOTER
   ============================================= */
footer {
  background: var(--ink);
  text-align: center;
  padding: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.07);
  font-size: 0.78rem; color: var(--ink-faint);
  transition: var(--transition);
}

/* =============================================
   SCROLL FADE-IN
   ============================================= */
.fade-in {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
  /* NAV */
  nav {
    padding: 0 0.75rem;
    height: 56px;
  }

  .nav-logo {
    font-size: 1rem;
  }

  .nav-profile-img {
    width: 36px;
    height: 36px;
  }

  .nav-links {
    gap: 0.8rem;
  }

  .nav-links a {
    font-size: 0.7rem;
    letter-spacing: 0.01em;
  }

  .nav-right {
    gap: 0.6rem;
  }

  .language-select {
    padding: 0.45rem 0.7rem;
    font-size: 0.75rem;
  }

  /* HERO */
  #hero {
    padding: 100px 1.5rem 60px;
  }

  .hero-name {
    font-size: clamp(2rem, 6vw, 3.5rem);
  }

  .hero-tagline {
    font-size: clamp(0.9rem, 2vw, 1rem);
    max-width: 90%;
  }

  /* ABOUT */
  #about .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-avatar-header {
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
  }

  .about-avatar-header .avatar-placeholder {
    width: 240px;
    height: 240px;
  }

  .avatar-name h3 {
    font-size: 1.5rem;
  }

  .about-body p {
    font-size: 1rem;
  }

  .section-title {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
  }

  .skills-row {
    gap: 6px;
  }

  .skill-tag {
    font-size: 0.8rem;
  }

  /* CV */
  .cv-content iframe {
    height: 400px;
  }

  /* CONTACT */
  .contact-email {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  }

  .contact-phone {
    font-size: clamp(0.95rem, 1.8vw, 1.3rem);
  }

  /* TIMELINE */
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .timeline-item:not(:last-child)::after {
    display: none;
  }

  .timeline-date {
    font-size: 0.75rem;
  }

  /* GENERAL */
  section {
    padding: 4rem 1.5rem;
  }
}

@media (max-width: 480px) {
  /* EXTRA SMALL SCREENS */
  nav {
    padding: 0 0.5rem;
    height: 52px;
  }

  .nav-logo {
    flex: 1;
  }

  .nav-profile-img {
    width: 32px;
    height: 32px;
  }

  .nav-right {
    gap: 0.4rem;
  }

  .nav-links {
    display: none;
  }

  .language-select {
    padding: 0.4rem 0.6rem;
    font-size: 0.7rem;
  }

  .theme-toggle {
    width: 40px;
    height: 22px;
  }

  .theme-toggle .toggle-thumb {
    width: 14px;
    height: 14px;
    top: 4px;
  }

  [data-theme="dark"] .theme-toggle .toggle-thumb {
    transform: translateX(18px);
  }

  .hero-name {
    font-size: clamp(1.5rem, 5vw, 2.5rem);
  }

  .hero-cta {
    padding: 12px 24px;
    font-size: 0.8rem;
  }

  .about-avatar-header {
    gap: 1rem;
  }

  .about-avatar-header .avatar-placeholder {
    width: 200px;
    height: 200px;
  }

  .avatar-name h3 {
    font-size: 1.2rem;
  }

  .avatar-initials {
    font-size: 2.5rem;
  }

  /* CV */
  .section-title {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  }

  .cv-content iframe {
    height: 300px;
  }

  /* CONTACT */
  .contact-email {
    font-size: clamp(1rem, 2vw, 1.4rem);
  }

  .contact-phone {
    font-size: clamp(0.9rem, 1.5vw, 1.2rem);
  }

  section {
    padding: 3rem 1rem;
  }
}

/* =============================================
   CV STYLES
   ============================================= */
.hidden {
  display: none;
}

.cv-button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 16px;
  transition: var(--transition);
  margin-top: 1rem;
}

.cv-button:hover {
  background: var(--accent-light);
  color: var(--ink);
}

.cv-section {
  padding: 4rem 0;
}

.cv-content {
  margin-top: 2rem;
}

.cv-content iframe {
  width: 100%;
  height: 600px;
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.cv-content iframe {
  width: 100%;
  height: 600px;
  display: block;
}