/* =========================================================
   CSS CUSTOM PROPERTIES — LIGHT & DARK THEMES
========================================================= */
:root {
  --accent:          #2563EB;
  --accent-light:    #3B82F6;
  --accent-dim:      rgba(37, 99, 235, 0.12);
  --accent-glow:     rgba(37, 99, 235, 0.25);

  --bg-base:         #F0F2F7;
  --bg-surface:      #FFFFFF;
  --bg-elevated:     #FFFFFF;
  --bg-glass:        rgba(255, 255, 255, 0.65);
  --bg-glass-card:   rgba(255, 255, 255, 0.55);
  --bg-glass-border: rgba(255, 255, 255, 0.85);

  --text-primary:    #0D1117;
  --text-secondary:  #4B5563;
  --text-tertiary:   #9CA3AF;
  --text-inverse:    #FFFFFF;

  --border-subtle:   rgba(0, 0, 0, 0.06);
  --border-glass:    rgba(255, 255, 255, 0.7);
  --border-accent:   rgba(37, 99, 235, 0.3);

  --shadow-sm:       0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:       0 4px 16px rgba(0,0,0,0.07), 0 1px 4px rgba(0,0,0,0.05);
  --shadow-lg:       0 12px 40px rgba(0,0,0,0.09), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-glass:    0 8px 32px rgba(37, 99, 235, 0.08), 0 2px 8px rgba(0,0,0,0.05);

  --nav-bg:          rgba(240, 242, 247, 0.75);
  --tag-bg:          rgba(37, 99, 235, 0.08);
  --tag-text:        #1D4ED8;
  --tag-border:      rgba(37, 99, 235, 0.2);
  --timeline-line:   rgba(37, 99, 235, 0.2);

  --radius-sm:       8px;
  --radius-md:       14px;
  --radius-lg:       20px;
  --radius-xl:       28px;

  --blur-glass:      blur(16px) saturate(180%);
  --transition:      all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-base:         #080C12;
  --bg-surface:      #0F1520;
  --bg-elevated:     #151D2E;
  --bg-glass:        rgba(15, 21, 32, 0.72);
  --bg-glass-card:   rgba(21, 29, 46, 0.65);
  --bg-glass-border: rgba(255, 255, 255, 0.06);

  --text-primary:    #EDF2FF;
  --text-secondary:  #8B9AB8;
  --text-tertiary:   #4B5E7A;
  --text-inverse:    #0D1117;

  --border-subtle:   rgba(255, 255, 255, 0.05);
  --border-glass:    rgba(255, 255, 255, 0.07);
  --border-accent:   rgba(59, 130, 246, 0.35);

  --shadow-sm:       0 1px 3px rgba(0,0,0,0.3), 0 1px 2px rgba(0,0,0,0.2);
  --shadow-md:       0 4px 16px rgba(0,0,0,0.35), 0 1px 4px rgba(0,0,0,0.2);
  --shadow-lg:       0 12px 40px rgba(0,0,0,0.5), 0 4px 16px rgba(0,0,0,0.3);
  --shadow-glass:    0 8px 32px rgba(37, 99, 235, 0.15), 0 2px 8px rgba(0,0,0,0.3);

  --nav-bg:          rgba(8, 12, 18, 0.8);
  --tag-bg:          rgba(59, 130, 246, 0.12);
  --tag-text:        #60A5FA;
  --tag-border:      rgba(59, 130, 246, 0.25);
  --timeline-line:   rgba(59, 130, 246, 0.2);

  --accent-dim:      rgba(59, 130, 246, 0.15);
  --accent-glow:     rgba(59, 130, 246, 0.3);
}

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

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

body {
  font-family: 'Outfit', sans-serif;
  font-weight: 400;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  transition: background 0.35s ease, color 0.35s ease;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
section { position: relative; z-index: 1; }

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
  line-height: 1;
  vertical-align: middle;
  user-select: none;
}

/* =========================================================
   LAYOUT UTILITIES
========================================================= */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.section-label::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--accent);
  opacity: 0.45;
}

.section-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.7;
}

.glass-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  transition: var(--transition);
}

/* =========================================================
   HEADER / NAVIGATION
========================================================= */
#header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 14px 0;
  transition: var(--transition);
}

#header.scrolled {
  background: var(--nav-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.logo-mark {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: var(--accent);
  display: flex; align-items: center; justify-content: center;
}
.logo-mark svg { width: 18px; height: 18px; }

.nav-links { display: flex; align-items: center; gap: 4px; }

.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-links a:hover { color: var(--text-primary); background: var(--accent-dim); }

.nav-actions { display: flex; align-items: center; gap: 8px; }

.lang-toggle {
  display: flex; align-items: center;
  background: var(--accent-dim);
  border-radius: 100px;
  padding: 3px; gap: 2px;
  border: 1px solid var(--border-accent);
}

.lang-btn {
  padding: 4px 10px;
  border-radius: 100px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  cursor: pointer; transition: var(--transition);
  border: none; background: transparent;
}
.lang-btn.active { background: var(--accent); color: #fff; box-shadow: 0 2px 8px var(--accent-glow); }

.icon-btn {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--text-secondary);
  transition: var(--transition);
}
.icon-btn:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.icon-btn .material-symbols-outlined { font-size: 20px; }

.nav-hamburger { display: none; }

/* =========================================================
   HERO SECTION
========================================================= */
#hero {
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.18;
  pointer-events: none;
}
[data-theme="dark"] .hero-blob { opacity: 0.12; }

.hero-blob-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  top: -100px; right: -100px;
}
.hero-blob-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #06B6D4 0%, transparent 70%);
  bottom: 0; left: -80px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 60px; align-items: center; width: 100%;
}

.hero-content { animation: fadeUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) both; }

.hero-greeting {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.85rem; color: var(--accent);
  letter-spacing: 0.08em; margin-bottom: 18px; opacity: 0.9;
  display: flex; align-items: center; gap: 10px;
}
.hero-greeting::before {
  content: ''; display: inline-block;
  width: 28px; height: 1.5px; background: var(--accent);
}

.hero-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 800; line-height: 1.06;
  letter-spacing: -0.03em; color: var(--text-primary);
  margin-bottom: 14px;
}
.hero-title .accent-text {
  background: linear-gradient(135deg, var(--accent) 0%, #06B6D4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-title .hero-subtitle-role {
  font-size: 0.52em;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.3;
  display: inline-block;
  margin-top: 4px;
}

.hero-subtitle {
  font-size: 1.15rem; color: var(--text-secondary);
  font-weight: 400; margin-bottom: 32px;
  max-width: 480px; line-height: 1.7;
}

.hero-badges {
  display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px;
}

.badge {
  display: flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: 100px;
  font-size: 0.8rem; font-weight: 500;
  background: var(--tag-bg); color: var(--tag-text);
  border: 1px solid var(--tag-border);
}
.badge .material-symbols-outlined { font-size: 15px; }

.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: var(--radius-md);
  font-size: 0.9rem; font-weight: 600;
  background: var(--accent); color: #fff; border: none; cursor: pointer;
  box-shadow: 0 4px 20px var(--accent-glow);
  transition: var(--transition); letter-spacing: 0.01em;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); background: var(--accent-light); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-md);
  font-size: 0.9rem; font-weight: 500;
  background: transparent; color: var(--text-secondary);
  border: 1px solid var(--border-subtle); cursor: pointer;
  transition: var(--transition);
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

/* Avatar */
.hero-avatar {
  animation: fadeUp 0.8s 0.15s cubic-bezier(0.4, 0, 0.2, 1) both;
  position: relative; flex-shrink: 0;
}

.avatar-ring {
  position: relative; width: 280px; height: 280px;
}
.avatar-ring::before {
  content: ''; position: absolute; inset: -6px; border-radius: 50%;
  background: conic-gradient(from 0deg, var(--accent), #06B6D4, transparent, var(--accent));
  animation: spin 8s linear infinite;
}
.avatar-ring::after {
  content: ''; position: absolute; inset: -4px; border-radius: 50%;
  background: var(--bg-base);
}

.avatar-img-wrap {
  position: absolute; inset: 0; z-index: 2;
  border-radius: 50%; overflow: hidden;
}
.avatar-img-wrap img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }

.hero-scroll {
  position: absolute; bottom: 36px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--text-tertiary);
  font-size: 0.72rem; font-family: 'IBM Plex Mono', monospace;
  letter-spacing: 0.1em;
  animation: bounceDown 2s ease-in-out infinite;
}
.hero-scroll .material-symbols-outlined { font-size: 20px; }

/* =========================================================
   ABOUT / TIMELINE
========================================================= */
#about { padding: 100px 0; }

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

.about-text p {
  color: var(--text-secondary); font-size: 1rem;
  line-height: 1.8; margin-bottom: 16px;
}

.about-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; margin-top: 36px;
}

.stat-card {
  padding: 20px; border-radius: var(--radius-md);
  background: var(--bg-glass-card); border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-glass); -webkit-backdrop-filter: var(--blur-glass);
  text-align: center; transition: var(--transition);
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-accent); }

.stat-number {
  font-family: 'Syne', sans-serif; font-size: 1.9rem; font-weight: 800;
  color: var(--accent); letter-spacing: -0.03em; line-height: 1; margin-bottom: 6px;
}
.stat-label { font-size: 0.75rem; color: var(--text-tertiary); font-weight: 500; }

/* Timeline */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 6px; bottom: 0; width: 1.5px;
  background: linear-gradient(to bottom, var(--accent) 0%, var(--timeline-line) 100%);
}

.timeline-item {
  position: relative; padding-bottom: 36px;
  animation: fadeUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute; left: -28px; top: 6px;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--bg-base); border: 2.5px solid var(--accent);
  box-shadow: 0 0 0 4px var(--accent-dim); transition: var(--transition);
}
.timeline-item:hover .timeline-dot { background: var(--accent); box-shadow: 0 0 0 5px var(--accent-glow); }

.timeline-card {
  background: var(--bg-glass-card); border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-glass); -webkit-backdrop-filter: var(--blur-glass);
  border-radius: var(--radius-md); padding: 20px 22px; transition: var(--transition);
}
.timeline-card:hover { transform: translateX(4px); border-color: var(--border-accent); box-shadow: var(--shadow-glass); }

.timeline-meta {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 10px; flex-wrap: wrap; gap: 6px;
}
.timeline-company {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.72rem;
  color: var(--accent); font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase;
}
.timeline-date {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.68rem;
  color: var(--text-tertiary); background: var(--accent-dim);
  padding: 3px 10px; border-radius: 100px;
}
.timeline-role {
  font-family: 'Syne', sans-serif; font-size: 1rem; font-weight: 700;
  color: var(--text-primary); margin-bottom: 8px;
}
.timeline-desc { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.65; }

.timeline-type-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 0.68rem; font-weight: 500;
  padding: 3px 10px; border-radius: 100px margin-top: 12px;
}
.badge-work { background: rgba(37,99,235,0.1); color: #3B82F6; border: 1px solid rgba(37,99,235,0.2); }
.badge-edu  { background: rgba(16,185,129,0.1); color: #10B981; border: 1px solid rgba(16,185,129,0.2); }
.badge-cert { background: rgba(245,158,11,0.1); color: #F59E0B; border: 1px solid rgba(245,158,11,0.2); }

/* Staggered animation */
.timeline-item:nth-child(1) { animation-delay: 0.05s; }
.timeline-item:nth-child(2) { animation-delay: 0.15s; }
.timeline-item:nth-child(3) { animation-delay: 0.25s; }
.timeline-item:nth-child(4) { animation-delay: 0.35s; }
.timeline-item:nth-child(5) { animation-delay: 0.45s; }

/* =========================================================
   SKILLS SECTION
========================================================= */
#skills { padding: 100px 0; background: transparent; }

.skills-header {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 60px; align-items: end; margin-bottom: 64px;
}

.skills-categories { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.skill-category {
  background: var(--bg-glass-card); border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-glass); -webkit-backdrop-filter: var(--blur-glass);
  border-radius: var(--radius-lg); padding: 28px 24px; transition: var(--transition);
}
.skill-category:hover { transform: translateY(-4px); box-shadow: var(--shadow-glass); border-color: var(--border-accent); }

.skill-cat-icon {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  background: var(--accent-dim); border: 1px solid var(--border-accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; color: var(--accent);
}
.skill-cat-icon .material-symbols-outlined { font-size: 22px; }
.skill-cat-title { font-family: 'Syne', sans-serif; font-size: 0.95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; }

.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.72rem;
  padding: 5px 10px; border-radius: 6px;
  background: var(--accent-dim); color: var(--tag-text);
  border: 1px solid var(--tag-border); transition: var(--transition); font-weight: 500;
}
.skill-tag:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: scale(1.03); }

/* =========================================================
   CERTIFICATIONS GRID
========================================================= */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.cert-card {
  background: var(--bg-glass-card); border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-glass); -webkit-backdrop-filter: var(--blur-glass);
  border-radius: var(--radius-md); padding: 24px 20px;
  text-align: center; transition: var(--transition);
  position: relative;
}
.cert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glass); border-color: var(--border-accent); }
a.cert-card-link {
  display: block; text-decoration: none; color: inherit; cursor: pointer;
}
a.cert-card-link:hover { border-color: var(--accent); }
.cert-link-hint {
  position: absolute; top: 10px; right: 10px;
  opacity: 0; transition: opacity 0.2s;
  color: var(--accent);
}
.cert-link-hint .material-symbols-outlined { font-size: 16px; }
a.cert-card-link:hover .cert-link-hint { opacity: 1; }

.cert-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: var(--accent-dim); border: 1px solid var(--border-accent);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px; color: var(--accent);
}
.cert-icon .material-symbols-outlined { font-size: 26px; }
.cert-name {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.78rem; font-weight: 500;
  color: var(--text-primary); margin-bottom: 5px; line-height: 1.4;
}
.cert-issuer { font-size: 0.73rem; color: var(--text-tertiary); margin-bottom: 6px; }
.cert-date {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.67rem;
  color: var(--accent); opacity: 0.8;
  background: var(--accent-dim); padding: 2px 8px; border-radius: 100px;
  display: inline-block;
}

/* =========================================================
   BLOG / WRITE-UPS
========================================================= */
#blog { padding: 100px 0; }

.blog-header {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 48px; flex-wrap: wrap; gap: 24px;
}

.blog-filters { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.filter-btn {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.72rem; font-weight: 500;
  padding: 7px 16px; border-radius: 100px;
  border: 1px solid var(--border-subtle); background: transparent;
  color: var(--text-secondary); cursor: pointer; transition: var(--transition); letter-spacing: 0.03em;
}
.filter-btn:hover, .filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: 0 2px 10px var(--accent-glow); }

.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.blog-card {
  background: var(--bg-glass-card); border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-glass); -webkit-backdrop-filter: var(--blur-glass);
  border-radius: var(--radius-lg); padding: 28px; cursor: pointer;
  transition: var(--transition); display: flex; flex-direction: column;
  gap: 14px; position: relative; overflow: hidden;
}
.blog-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), #06B6D4);
  transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease;
}
.blog-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--border-accent); }
.blog-card:hover::before { transform: scaleX(1); }

.blog-card-meta { display: flex; align-items: center; justify-content: space-between; }
.blog-date { font-family: 'IBM Plex Mono', monospace; font-size: 0.68rem; color: var(--text-tertiary); letter-spacing: 0.05em; }

.blog-category-icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: var(--accent-dim); border: 1px solid var(--tag-border);
  display: flex; align-items: center; justify-content: center; color: var(--accent);
}
.blog-category-icon .material-symbols-outlined { font-size: 16px; }

.blog-title {
  font-family: 'Syne', sans-serif; font-size: 1.05rem; font-weight: 700;
  color: var(--text-primary); line-height: 1.4;
}
.blog-excerpt { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.65; flex-grow: 1; }

.blog-footer {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
}
.blog-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.blog-tag { font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem; padding: 3px 9px; border-radius: 5px; font-weight: 500; }

.tag-web    { background: rgba(59,130,246,0.12); color: #3B82F6; border: 1px solid rgba(59,130,246,0.2); }
.tag-pwn    { background: rgba(239,68,68,0.1);   color: #EF4444; border: 1px solid rgba(239,68,68,0.2); }
.tag-crypto { background: rgba(168,85,247,0.1);  color: #A855F7; border: 1px solid rgba(168,85,247,0.2); }
.tag-re     { background: rgba(245,158,11,0.1);  color: #F59E0B; border: 1px solid rgba(245,158,11,0.2); }
.tag-osint  { background: rgba(16,185,129,0.1);  color: #10B981; border: 1px solid rgba(16,185,129,0.2); }
.tag-misc   { background: rgba(107,114,128,0.1); color: #6B7280; border: 1px solid rgba(107,114,128,0.2); }
.tag-tuto   { background: rgba(6,182,212,0.1);   color: #06B6D4; border: 1px solid rgba(6,182,212,0.2); }

.blog-read-more {
  display: flex; align-items: center; gap: 4px;
  font-size: 0.8rem; font-weight: 600; color: var(--accent); transition: var(--transition);
}
.blog-read-more .material-symbols-outlined { font-size: 16px; }
.blog-card:hover .blog-read-more { gap: 8px; }
.blog-card[data-hidden="true"] { display: none; }

/* =========================================================
   ARTICLE MODAL
========================================================= */
.modal-overlay {
  display: none;
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(8, 12, 18, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow-y: auto;
  padding: 40px 24px;
}
.modal-overlay.open { display: flex; align-items: flex-start; justify-content: center; }

.modal-inner {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 48px 52px;
  max-width: 780px; width: 100%;
  margin: auto;
  box-shadow: var(--shadow-lg);
  animation: fadeUp 0.35s cubic-bezier(0.4,0,0.2,1) both;
}

.modal-close {
  position: absolute; top: 20px; right: 20px;
}

.modal-meta {
  display: flex; align-items: center; gap: 14px; margin-bottom: 20px; flex-wrap: wrap;
}

.modal-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800; color: var(--text-primary);
  line-height: 1.2; margin-bottom: 32px;
}

.modal-content {
  font-size: 0.97rem; color: var(--text-secondary);
  line-height: 1.85;
}
.modal-content h2 {
  font-family: 'Syne', sans-serif; font-size: 1.15rem; font-weight: 700;
  color: var(--text-primary); margin: 28px 0 12px;
}
.modal-content h3 {
  font-family: 'Syne', sans-serif; font-size: 1rem; font-weight: 700;
  color: var(--text-primary); margin: 22px 0 8px;
}
.modal-content p { margin-bottom: 16px; }
.modal-content ul { margin: 12px 0 16px 20px; list-style: disc; }
.modal-content ul li { margin-bottom: 6px; }
.modal-content code {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.82rem;
  background: var(--accent-dim); color: var(--tag-text);
  padding: 2px 7px; border-radius: 5px; border: 1px solid var(--tag-border);
}
.modal-content pre {
  background: var(--bg-elevated); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 20px 22px; overflow-x: auto;
  margin: 16px 0;
}
.modal-content pre code {
  background: none; border: none; padding: 0;
  font-size: 0.83rem; color: var(--text-primary);
}
.modal-content .callout {
  border-left: 3px solid var(--accent); padding: 16px 18px;
  background: var(--accent-dim); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 16px 0; color: var(--text-secondary);
}
.modal-content .coming-soon {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 60px 20px; text-align: center; gap: 16px;
}
.modal-content .coming-soon .material-symbols-outlined { font-size: 48px; color: var(--accent); opacity: 0.5; }
.modal-content .coming-soon strong { font-family: 'Syne', sans-serif; font-size: 1.1rem; color: var(--text-primary); }
.modal-content .coming-soon p { color: var(--text-tertiary); font-size: 0.9rem; }

/* =========================================================
   CONTACT SECTION
========================================================= */
#contact { padding: 100px 0; }

.contact-grid {
  display: grid; grid-template-columns: 1fr 1.4fr;
  gap: 60px; align-items: start;
}

.contact-info { display: flex; flex-direction: column; gap: 20px; }

.contact-link-card {
  display: flex; align-items: center; gap: 16px; padding: 18px 20px;
  border-radius: var(--radius-md); background: var(--bg-glass-card);
  border: 1px solid var(--border-glass); backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass); transition: var(--transition); text-decoration: none;
}
.contact-link-card:hover { transform: translateX(6px); border-color: var(--border-accent); box-shadow: var(--shadow-glass); }

.contact-link-icon {
  width: 44px; height: 44px; flex-shrink: 0; border-radius: 12px;
  background: var(--accent-dim); border: 1px solid var(--border-accent);
  display: flex; align-items: center; justify-content: center; color: var(--accent);
}
.contact-link-icon .material-symbols-outlined { font-size: 22px; }
.contact-link-text strong { display: block; font-weight: 600; font-size: 0.88rem; color: var(--text-primary); margin-bottom: 2px; }
.contact-link-text span { font-family: 'IBM Plex Mono', monospace; font-size: 0.72rem; color: var(--text-tertiary); }

.contact-arrow { margin-left: auto; color: var(--text-tertiary); transition: var(--transition); }
.contact-link-card:hover .contact-arrow { color: var(--accent); transform: translateX(3px); }

.contact-form-wrap {
  background: var(--bg-glass-card); border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-glass); -webkit-backdrop-filter: var(--blur-glass);
  border-radius: var(--radius-xl); padding: 36px 32px; box-shadow: var(--shadow-glass);
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.8rem; font-weight: 500; color: var(--text-secondary); margin-bottom: 8px; letter-spacing: 0.02em; }

.form-group input, .form-group textarea {
  width: 100%; padding: 13px 16px; border-radius: var(--radius-sm);
  background: var(--bg-base); border: 1px solid var(--border-subtle);
  color: var(--text-primary); font-family: 'Outfit', sans-serif;
  font-size: 0.9rem; transition: var(--transition); outline: none; resize: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.form-group textarea { height: 120px; }
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-tertiary); }

.form-submit {
  width: 100%; padding: 14px; border-radius: var(--radius-md);
  font-family: 'Outfit', sans-serif; font-size: 0.92rem; font-weight: 600;
  background: var(--accent); color: #fff; border: none; cursor: pointer;
  box-shadow: 0 4px 20px var(--accent-glow); transition: var(--transition);
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); background: var(--accent-light); }

/* =========================================================
   FOOTER
========================================================= */
footer {
  padding: 40px 0; border-top: 1px solid var(--border-subtle);
  position: relative; z-index: 1;
}
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.footer-copy { font-size: 0.82rem; color: var(--text-tertiary); }
.footer-links { display: flex; align-items: center; gap: 28px; }
.footer-links a { font-size: 0.82rem; color: var(--text-tertiary); transition: var(--transition); }
.footer-links a:hover { color: var(--accent); }

/* =========================================================
   ANIMATIONS
========================================================= */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 6px #22C55E; }
  50%       { box-shadow: 0 0 12px #22C55E, 0 0 20px rgba(34,197,94,0.3); }
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes bounceDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* Animación escalonada para el menú móvil */
.mobile-nav.open a {
  animation: fadeUp 0.4s ease forwards;
  opacity: 0;
}
.mobile-nav.open a:nth-child(2) { animation-delay: 0.1s; }
.mobile-nav.open a:nth-child(3) { animation-delay: 0.2s; }
.mobile-nav.open a:nth-child(4) { animation-delay: 0.3s; }
.mobile-nav.open a:nth-child(5) { animation-delay: 0.4s; }

/* =========================================================
   DECORATIVE
========================================================= */
.section-divider {
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--border-subtle) 30%, var(--border-subtle) 70%, transparent 100%);
}
.title-underline {
  display: inline-block; width: 48px; height: 4px; border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), #06B6D4); margin-bottom: 28px;
}

/* Mobile nav (Base) */
.mobile-nav {
  display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  z-index: 999; background: var(--nav-bg);
  backdrop-filter: var(--blur-glass); -webkit-backdrop-filter: var(--blur-glass);
  flex-direction: column; align-items: center; justify-content: center; gap: 20px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  font-family: 'Syne', sans-serif; font-size: 1.6rem; font-weight: 700;
  color: var(--text-primary); transition: var(--transition);
}
.mobile-nav a:hover { color: var(--accent); }
.mobile-nav-close { position: absolute; top: 20px; right: 24px; }

/* =========================================================
   RESPONSIVE & APP-LIKE EXPERIENCE (TABLET & MOBILE)
========================================================= */
@media (max-width: 960px) {
  .hero-inner        { grid-template-columns: 1fr; text-align: center; }
  .hero-greeting     { justify-content: center; }
  .hero-cta          { justify-content: center; }
  .hero-badges       { justify-content: center; }
  .hero-avatar       { display: flex; justify-content: center; order: -1; }
  .avatar-ring       { width: 220px; height: 220px; }
  
  .about-grid        { grid-template-columns: 1fr; gap: 48px; }
  .skills-header     { grid-template-columns: 1fr; }
  .contact-grid      { grid-template-columns: 1fr; }
  
  .nav-links         { display: none; }
  .nav-hamburger     { display: flex; }
  
  /* Fallback grids for mid-size screens before swipe activates */
  .blog-grid         { grid-template-columns: 1fr 1fr; }
  .skills-categories { grid-template-columns: 1fr 1fr; }
  .certs-grid        { grid-template-columns: repeat(2, 1fr); }
  
  .modal-inner       { padding: 36px 28px; }
}

@media (max-width: 768px) {
  /* =====================================================
     AJUSTES DEL HEADER MÓVIL (EVITAR "OUT OF VIEW")
  ===================================================== */
  #header .container { padding: 0 16px; }
  .nav-inner         { gap: 8px; }
  .nav-actions       { gap: 6px; }
  
  /* Reducir ligeramente el tamaño de los botones */
  .icon-btn { width: 34px; height: 34px; }
  .icon-btn .material-symbols-outlined { font-size: 18px; }
  .lang-btn { padding: 3px 8px; font-size: 0.65rem; }
  
  /* Ajustar logo */
  .nav-logo { font-size: 1rem; gap: 8px; }
  .logo-mark { width: 30px; height: 30px; border-radius: 8px; }
  .logo-mark svg { width: 16px; height: 16px; }
  
  /* =====================================================
     RESTO DE EXPERIENCIA APP-LIKE
  ===================================================== */
  #hero { padding: 100px 0 60px; }
  .hero-inner { gap: 32px; }
  .avatar-ring { width: 180px !important; height: 180px !important; margin: 0 auto; }
  .hero-title { font-size: clamp(2rem, 8vw, 2.4rem); }

  /* Swipe Horizontal (Carruseles para UI limpia) */
  .skills-categories,
  .certs-grid {
    display: flex !important;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 16px;
    padding-bottom: 24px;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
  }
  .skills-categories::-webkit-scrollbar,
  .certs-grid::-webkit-scrollbar { 
    display: none; /* Chrome/Safari */
  }

  .skill-category,
  .cert-card {
    min-width: 280px;
    flex-shrink: 0;
    scroll-snap-align: center;
  }

  /* Grillas de 1 columna para móviles */
  .blog-grid   { grid-template-columns: 1fr !important; gap: 16px; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .form-row    { grid-template-columns: 1fr; }

  /* Inputs amigables con iOS (evitar auto-zoom) */
  .form-group input,
  .form-group textarea {
    font-size: 16px !important;
    padding: 16px;
  }

  /* Timeline más compacto */
  .timeline { padding-left: 20px; }
  .timeline::before { left: 4px; }
  .timeline-dot { left: -22px; width: 14px; height: 14px; }
  .timeline-card { padding: 16px; }

  /* Modal Inmersivo (Pantalla Completa) */
  .modal-overlay { padding: 0; }
  .modal-inner {
    border-radius: 0;
    min-height: 100vh;
    padding: 60px 24px 40px;
    border: none;
  }
  .modal-close {
    top: 16px;
    right: 16px;
    background: var(--bg-glass-card);
  }
}

/* Pantallas extremadamente pequeñas (ej: iPhone SE).
   Ocultamos tu nombre y dejamos solo el icono SVG para liberar espacio
   y evitar que los botones salgan de la pantalla por falta de pixeles. */
@media (max-width: 380px) {
  .nav-logo { font-size: 0; } 
}