/* ===================================================================
   DATA ANALYST PORTFOLIO - MODERN DARK THEME STYLESHEET
   =================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
  /* Colors */
  --bg-primary: #090d16;
  --bg-secondary: #0f172a;
  --bg-card: rgba(17, 24, 39, 0.85);
  --bg-card-hover: rgba(26, 36, 56, 0.95);
  --bg-card-inner: rgba(15, 23, 42, 0.65);
  --bg-header: rgba(9, 13, 22, 0.88);
  
  /* Text Colors (White / High Contrast) */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  /* Accent Gradients & Colors */
  --accent-cyan: #38bdf8;
  --accent-indigo: #818cf8;
  --accent-emerald: #34d399;
  --accent-amber: #fbbf24;
  --accent-rose: #f43f5e;
  --gradient-accent: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
  --gradient-glow: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(129, 140, 248, 0.15) 100%);
  
  /* Borders */
  --border-card: 1.5px solid rgba(255, 255, 255, 0.1);
  --border-card-hover: 1.5px solid rgba(56, 189, 248, 0.45);
  --border-subtle: 1px solid rgba(255, 255, 255, 0.08);
  --border-radius-lg: 18px;
  --border-radius-md: 12px;
  --border-radius-sm: 8px;
  
  /* Shadows */
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.15);
  --shadow-button: 0 4px 14px rgba(56, 189, 248, 0.25);

  /* Fonts */
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-code: 'JetBrains Mono', monospace;

  /* Layout */
  --max-width: 1040px;
  --header-height: 72px;
}

/* --- Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  font-size: 16px;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.65;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle Data Grid Ambient Background */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 15% 20%, rgba(56, 189, 248, 0.07) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(129, 140, 248, 0.06) 0%, transparent 45%),
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: -1;
}

/* --- Sticky Header --- */
.sticky-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--bg-header);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: var(--border-subtle);
  z-index: 1000;
  transition: all 0.3s ease;
}

.sticky-header.scrolled {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  border-bottom-color: rgba(56, 189, 248, 0.2);
}

.header-container {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  transition: transform 0.2s ease;
}

.brand-logo:hover {
  transform: translateY(-1px);
}

.logo-symbol {
  font-family: var(--font-code);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.logo-text {
  font-weight: 700;
}

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

/* Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.5rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-radius: var(--border-radius-sm);
  transition: all 0.2s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
  color: var(--text-main);
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

/* Header Actions (Language button & mobile toggle) */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Language Switcher Button */
.lang-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1.5px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
  padding: 0.45rem 0.85rem;
  border-radius: 9999px;
  cursor: pointer;
  font-family: var(--font-code);
  font-size: 0.82rem;
  font-weight: 600;
  transition: all 0.25s ease;
}

.lang-toggle-btn i {
  color: var(--accent-cyan);
  font-size: 0.95rem;
}

.lang-toggle-btn:hover {
  background: rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
  transform: translateY(-1px);
}

.lang-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
}

.lang-code {
  color: var(--text-dim);
  transition: color 0.2s ease;
}

.lang-code.active {
  color: var(--accent-cyan);
  font-weight: 700;
}

.lang-divider {
  color: var(--text-dim);
  opacity: 0.5;
}

/* Mobile Toggle Hamburger */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: 1.5px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
  padding: 0.45rem 0.65rem;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  font-size: 1.1rem;
  transition: all 0.2s ease;
}

.mobile-menu-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--accent-cyan);
}

/* --- Main Layout Wrapper --- */
.main-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
}

/* --- Section Cards (Recuadros) --- */
.section-card {
  background: var(--bg-card);
  border: var(--border-card);
  border-radius: var(--border-radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
  position: relative;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.section-card:hover {
  border-color: rgba(255, 255, 255, 0.16);
}

.section-header {
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding-bottom: 1rem;
}

.section-title {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-main);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.section-title::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 1.35em;
  background: var(--gradient-accent);
  border-radius: 4px;
}

/* ===================================================================
   SECTION 1: ABOUT (Matches 1.png)
   =================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 2.5rem;
  align-items: center;
}

.photo-wrapper {
  display: flex;
  justify-content: center;
}

.photo-frame {
  position: relative;
  width: 240px;
  height: 240px;
  border-radius: var(--border-radius-md);
  border: 2px solid rgba(56, 189, 248, 0.35);
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.15);
  background: var(--bg-secondary);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.photo-frame:hover {
  transform: translateY(-3px) scale(1.02);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 35px rgba(56, 189, 248, 0.3);
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.photo-badge {
  position: absolute;
  bottom: 10px;
  right: 10px;
  width: 36px;
  height: 36px;
  background: rgba(9, 13, 22, 0.9);
  border: 1.5px solid var(--accent-cyan);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 0.9rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

.about-content {
  display: flex;
  flex-direction: column;
}

.section-tag {
  font-family: var(--font-code);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 0.4rem;
}

.about-title {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.1rem;
  background: linear-gradient(to right, #ffffff, #cbd5e1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.about-description {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 1.85rem;
}

.about-description strong {
  color: var(--text-main);
  font-weight: 700;
}

/* Social buttons (LinkedIn, GitHub, Email) */
.about-social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.social-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--border-radius-sm);
  border: 1.5px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
  transition: all 0.25s ease;
}

.social-btn i {
  font-size: 1.15rem;
  transition: transform 0.2s ease;
}

.social-btn:hover {
  transform: translateY(-2px);
}

.social-btn:hover i {
  transform: scale(1.15);
}

/* Individual Social Button Hover Accents */
.linkedin-btn:hover {
  border-color: #0a66c2;
  background: rgba(10, 102, 194, 0.15);
  color: #60a5fa;
  box-shadow: 0 4px 15px rgba(10, 102, 194, 0.25);
}

.github-btn:hover {
  border-color: #cbd5e1;
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.15);
}

.email-btn:hover {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.25);
}

/* ===================================================================
   SECTION 2: SKILLS (Matches 1.png)
   =================================================================== */
.skills-group {
  margin-bottom: 2.25rem;
}

.skills-group:last-child {
  margin-bottom: 0;
}

.skills-subtitle {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.subtitle-icon {
  color: var(--accent-cyan);
  font-size: 1.1rem;
}

/* Skills Grid */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.15rem;
}

/* Each skill in its own recuadro/card */
.skill-card {
  background: var(--bg-card-inner);
  border: var(--border-card);
  border-radius: var(--border-radius-md);
  padding: 1.15rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex: 1 1 auto;
  min-width: max-content;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}

.skill-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0%;
  background: var(--accent-cyan);
  transition: height 0.25s ease;
}

.skill-card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.skill-card:hover::after {
  height: 100%;
}

.skill-icon-box {
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.45rem;
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: transform 0.2s ease;
}

.skill-card:hover .skill-icon-box {
  transform: scale(1.1);
}

/* Specific Skill Colors */
.python-icon { color: #38bdf8; background: rgba(56, 189, 248, 0.12); border-color: rgba(56, 189, 248, 0.25); }
.excel-icon { color: #22c55e; background: rgba(34, 197, 94, 0.12); border-color: rgba(34, 197, 94, 0.25); }
.sql-icon { color: #f59e0b; background: rgba(245, 158, 11, 0.12); border-color: rgba(245, 158, 11, 0.25); }
.powerbi-icon { color: #fbbf24; background: rgba(251, 191, 36, 0.12); border-color: rgba(251, 191, 36, 0.25); }
.tableau-icon { color: #60a5fa; background: rgba(96, 165, 250, 0.12); border-color: rgba(96, 165, 250, 0.25); }
.r-icon { color: #818cf8; background: rgba(129, 140, 248, 0.12); border-color: rgba(129, 140, 248, 0.25); }
.etl-icon { color: #a78bfa; background: rgba(167, 139, 250, 0.12); border-color: rgba(167, 139, 250, 0.25); }
.git-icon { color: #f43f5e; background: rgba(244, 63, 94, 0.12); border-color: rgba(244, 63, 94, 0.25); }

.skill-info {
  display: flex;
  flex-direction: column;
}

.skill-name {
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text-main);
}

.skill-category {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* Languages Grid */
.languages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.15rem;
}

/* Each Language in its own recuadro/card */
.language-card {
  background: var(--bg-card-inner);
  border: var(--border-card);
  border-radius: var(--border-radius-md);
  padding: 1.2rem 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: all 0.25s ease;
}

.language-card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  border-color: rgba(129, 140, 248, 0.4);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.language-icon-box {
  font-size: 2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lang-text-pill {
  font-family: var(--font-code);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1.5px solid rgba(56, 189, 248, 0.3);
  padding: 0.25rem 0.6rem;
  border-radius: var(--border-radius-sm);
  display: inline-block;
  line-height: 1;
}

.language-info {
  flex-grow: 1;
}

.language-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
}

.language-level {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.language-badge {
  font-family: var(--font-code);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.3rem 0.6rem;
  border-radius: var(--border-radius-sm);
  text-transform: uppercase;
}

.native-badge {
  background: rgba(52, 211, 153, 0.12);
  color: var(--accent-emerald);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.b2-badge {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.hsk-badge {
  background: rgba(251, 191, 36, 0.12);
  color: var(--accent-amber);
  border: 1px solid rgba(251, 191, 36, 0.3);
}

/* ===================================================================
   SECTION 3: PROJECTS (Matches 2.png)
   =================================================================== */
.projects-container {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

/* Each Project in its own recuadro/card */
.project-card {
  background: var(--bg-card-inner);
  border: var(--border-card);
  border-radius: var(--border-radius-md);
  padding: 1.85rem;
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.project-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 12px 28px -5px rgba(0, 0, 0, 0.55), var(--shadow-glow);
}

.project-header {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.project-badge {
  font-family: var(--font-code);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  width: fit-content;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 0.2rem 0.55rem;
  border-radius: var(--border-radius-sm);
}

.project-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.015em;
  line-height: 1.35;
}

/* Tech Stack Tags */
.project-tech-stack,
.experience-tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.35rem;
}

.tech-tag {
  font-family: var(--font-code);
  font-size: 0.76rem;
  font-weight: 500;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.25rem 0.65rem;
  border-radius: var(--border-radius-sm);
}

/* Project Bullets list format */
.project-bullets,
.experience-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.project-bullets li,
.experience-bullets li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Stylized bullet points as requested */
.project-bullets li::before,
.experience-bullets li::before {
  content: "";
  position: absolute;
  left: 0.1rem;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
}

/* Project Action Links (GitHub repo & Live web address) */
.project-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: var(--border-radius-sm);
  transition: all 0.2s ease;
}

.repo-link {
  background: rgba(255, 255, 255, 0.05);
  border: 1.5px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
}

.repo-link:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.demo-link {
  background: rgba(56, 189, 248, 0.12);
  border: 1.5px solid rgba(56, 189, 248, 0.35);
  color: var(--accent-cyan);
}

.demo-link:hover {
  background: rgba(56, 189, 248, 0.22);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.3);
  transform: translateY(-2px);
}

/* ===================================================================
   SECTION 4: WORK EXPERIENCE (Matches 2.png)
   =================================================================== */
.timeline-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  padding-left: 2.2rem;
}

/* Vertical line connecting each experience as requested */
.timeline-vertical-line {
  position: absolute;
  top: 1.25rem;
  bottom: 1.25rem;
  left: 11px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--accent-cyan) 0%,
    var(--accent-indigo) 50%,
    rgba(129, 140, 248, 0.15) 100%
  );
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
}

.timeline-item {
  position: relative;
}

/* Node marker on vertical line */
.timeline-marker {
  position: absolute;
  left: -2.2rem;
  top: 1.6rem;
  transform: translateX(-50%);
  z-index: 2;
}

.timeline-dot {
  width: 14px;
  height: 14px;
  background: var(--bg-primary);
  border: 2.5px solid var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--accent-cyan);
  transition: transform 0.25s ease, background 0.25s ease;
}

.timeline-item:hover .timeline-dot {
  transform: scale(1.3);
  background: var(--accent-cyan);
}

/* Each Work Experience in its own recuadro/card */
.timeline-card {
  background: var(--bg-card-inner);
  border: var(--border-card);
  border-radius: var(--border-radius-md);
  padding: 1.85rem;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.timeline-card:hover {
  transform: translateY(-3px);
  background: var(--bg-card-hover);
  border-color: rgba(129, 140, 248, 0.4);
  box-shadow: 0 12px 28px -5px rgba(0, 0, 0, 0.55);
}

.experience-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.job-role {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.015em;
}

.company-name {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--accent-cyan);
  display: block;
  margin-top: 0.2rem;
}

.job-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-code);
}

.job-dates, .job-location {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.job-dates i, .job-location i {
  color: var(--accent-indigo);
}

.experience-tech-tags {
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ===================================================================
   FLOATING BACK TO TOP BUTTON
   =================================================================== */
.back-to-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1.5px solid rgba(56, 189, 248, 0.4);
  color: var(--accent-cyan);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5), 0 0 15px rgba(56, 189, 248, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 999;
}

.back-to-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top-btn:hover {
  background: var(--accent-cyan);
  color: #090d16;
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(56, 189, 248, 0.4);
}

/* ===================================================================
   FOOTER
   =================================================================== */
.site-footer {
  border-top: var(--border-subtle);
  background: rgba(9, 13, 22, 0.95);
  padding: 2.25rem 1.5rem;
  margin-top: 2rem;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.25rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-dot {
  color: var(--text-dim);
  font-size: 0.6rem;
}

/* ===================================================================
   RESPONSIVE DESIGN (Tablets & Mobile)
   =================================================================== */
@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }

  .photo-wrapper {
    margin: 0 auto;
  }

  .about-social-links {
    justify-content: center;
  }

  .experience-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-container {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .section-card {
    padding: 1.5rem;
  }

  .about-title {
    font-size: 2rem;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(9, 13, 22, 0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
  }

  .nav-item {
    width: 100%;
    text-align: center;
  }

  .nav-link {
    display: block;
    padding: 0.75rem 1rem;
    font-size: 1.05rem;
  }

  .timeline-wrapper {
    padding-left: 1.8rem;
  }

  .timeline-marker {
    left: -1.8rem;
  }

  .back-to-top-btn {
    bottom: 1.25rem;
    right: 1.25rem;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .photo-frame {
    width: 200px;
    height: 200px;
  }

  .section-card {
    padding: 1.25rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .skills-grid {
    flex-direction: column;
  }

  .skill-card {
    min-width: 100%;
  }

  .skill-category {
    white-space: normal;
  }

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

  .project-footer {
    flex-direction: column;
  }

  .project-link {
    justify-content: center;
  }
}