/* ==========================================================================
   FABIO IGNACIO TORRES BENÍTEZ — PORTFOLIO DESIGN SYSTEM
   Theme: Blanco Grisáceo (Default) & Sleek Tech Dark Mode
   Author: Torres Career Operations (Showcase UI/UX Architect)
   ========================================================================== */

:root {
  /* Color Palette — Blanco Grisáceo (Default) */
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-tertiary: #e2e8f0;
  --surface: #ffffff;
  --surface-hover: #f8fafc;
  --surface-border: #e2e8f0;
  --surface-border-hover: #cbd5e1;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  /* Brand & Accent Colors */
  --accent-primary: #2563eb;       /* Royal Blue */
  --accent-primary-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-secondary: #0891b2;     /* Cyan */
  --accent-emerald: #059669;       /* Production Success */
  --accent-amber: #d97706;         /* Warning / In-Progress */
  --accent-purple: #7c3aed;        /* AI / Cognition */
  
  /* Badges & Pills */
  --badge-bg: #f1f5f9;
  --badge-text: #334155;
  --badge-border: #e2e8f0;
  
  /* Shadows & Depth */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(226, 232, 240, 0.8);
  
  /* Transitions */
  --transition-base: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  /* Layout */
  --max-width: 1200px;
}

/* Dark Mode Theme Variables */
[data-theme="dark"] {
  --bg-primary: #0b0f19;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --surface: #161f30;
  --surface-hover: #1c273c;
  --surface-border: #26334a;
  --surface-border-hover: #3b82f6;
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;
  
  --accent-primary: #3b82f6;
  --accent-primary-hover: #60a5fa;
  --accent-light: rgba(59, 130, 246, 0.15);
  --accent-secondary: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-purple: #a855f7;
  
  --badge-bg: #1e293b;
  --badge-text: #cbd5e1;
  --badge-border: #334155;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
  
  --glass-bg: rgba(11, 15, 25, 0.88);
  --glass-border: rgba(38, 51, 74, 0.8);
}

/* Reset & Global Elements */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

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

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: var(--transition-base);
}

a:hover {
  color: var(--accent-primary-hover);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  transition: var(--transition-base);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #ffffff;
  font-weight: 800;
  font-size: 1rem;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Interactive Controls: Theme & Lang Toggle */
.control-btn {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.control-btn:hover {
  background: var(--surface-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.lang-btn {
  font-weight: 700;
  font-size: 0.85rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-primary);
  color: #ffffff !important;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--surface);
  color: var(--text-primary);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--surface-border);
  cursor: pointer;
  transition: var(--transition-base);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  transform: translateY(-1px);
}

/* Hero Section */
.hero {
  padding: 4rem 0 3rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 3rem;
  align-items: center;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--accent-light);
  color: var(--accent-primary);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 2.85rem;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  max-width: 650px;
}

.hero-narrative {
  background: var(--surface);
  border-left: 4px solid var(--accent-primary);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--surface-border);
  border-left-width: 4px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-profile-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.profile-avatar-wrapper {
  width: 170px;
  height: 170px;
  margin: 0 auto 1.25rem;
  border-radius: 50%;
  padding: 5px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  box-shadow: var(--shadow-md);
}

.profile-avatar {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: var(--surface);
  display: block;
}

.profile-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.profile-tag {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.profile-links {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}

.profile-link-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--surface-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition-base);
}

.profile-link-btn:hover {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  transform: translateY(-2px);
}

/* Metrics Bar (Google XYZ & High ROI) */
.metrics-section {
  padding: 2rem 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--surface-border);
  border-bottom: 1px solid var(--surface-border);
  margin-bottom: 4rem;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
}

.metric-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
}

.metric-number {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent-primary);
  margin-bottom: 0.25rem;
  font-feature-settings: "tnum";
}

.metric-label {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.metric-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Section Common */
.section {
  padding: 4rem 0;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 3rem;
}

.section-badge {
  display: inline-block;
  background: var(--badge-bg);
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
  border: 1px solid var(--badge-border);
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* Moat / Strategy Section ("Del Diván al Dato") */
.moat-container {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 4rem;
}

.moat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}

.moat-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.moat-content p {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

.moat-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.moat-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.moat-bullet {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.moat-visual {
  background: var(--bg-secondary);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.pipeline-step {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.25rem;
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow-sm);
}

.pipeline-step:last-child {
  margin-bottom: 0;
}

.pipeline-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
}

.pipeline-tech {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: monospace;
}

/* Projects Filters & Grid */
.filter-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.5rem;
}

.tab-btn {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
}

.tab-btn:hover,
.tab-btn.active {
  background: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--surface-border-hover);
  box-shadow: var(--shadow-xl);
}

.project-card.featured {
  border-top: 4px solid var(--accent-primary);
}

.project-badge-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.type-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.1);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
}

.live-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-emerald);
}

.project-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.55;
}

.xyz-metric-box {
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent-primary);
  padding: 0.75rem 0.95rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.45;
}

.xyz-metric-box strong {
  color: var(--accent-primary);
  font-weight: 700;
  display: inline;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.tech-tag {
  background: var(--badge-bg);
  color: var(--badge-text);
  border: 1px solid var(--badge-border);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-family: monospace;
}

.project-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: auto;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}

.card-link-primary {
  background: var(--accent-primary);
  color: #ffffff !important;
}

.card-link-primary:hover {
  background: var(--accent-primary-hover);
}

.card-link-secondary {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--surface-border);
}

.card-link-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Interactive Architecture Section */
.arch-container {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.arch-flow-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  position: relative;
  align-items: center;
}

.flow-node {
  background: var(--bg-secondary);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  text-align: center;
  transition: var(--transition-base);
}

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

.flow-number {
  width: 28px;
  height: 28px;
  background: var(--accent-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.75rem;
}

.flow-node h4 {
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.flow-node p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Skills Cluster */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.skill-category {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.skill-category h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.skill-items {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.skill-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.92rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--surface-border);
}

.skill-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.skill-level {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: var(--accent-light);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

/* Experience & Education Timelines */
.timeline {
  position: relative;
  max-width: 850px;
  margin: 0 auto;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--surface-border);
}

.timeline-item {
  position: relative;
  padding-left: 55px;
  margin-bottom: 2.5rem;
}

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--surface);
  border: 3px solid var(--accent-primary);
  box-shadow: 0 0 0 4px var(--bg-primary);
}

.timeline-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.timeline-role {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.timeline-period {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-primary);
  background: var(--accent-light);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
}

.timeline-company {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.timeline-card ul {
  list-style-type: disc;
  padding-left: 1.25rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* Contact & CTA */
.cta-section {
  background: linear-gradient(135deg, var(--surface) 0%, var(--bg-secondary) 100%);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  margin-bottom: 4rem;
}

.cta-section h2 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta-section p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Footer */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--surface-border);
  padding: 2.5rem 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: 25px;
  right: 25px;
  background: var(--text-primary);
  color: var(--surface);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-subtitle {
    margin: 0 auto 1.5rem;
  }
  
  .hero-narrative {
    text-align: left;
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .hero-profile-card {
    max-width: 400px;
    margin: 0 auto;
  }
  
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .moat-grid {
    grid-template-columns: 1fr;
  }
  
  .arch-flow-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Can be enhanced with mobile menu */
  }
  
  .hero-title {
    font-size: 2.15rem;
  }
  
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

/* Tri-Language Switcher (EN / ES / 中文) */
.lang-switch-group {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 2px;
  box-shadow: var(--shadow-sm);
}

.lang-pill {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-base);
}

.lang-pill:hover {
  color: var(--accent-primary);
  background: var(--surface-hover);
}

.lang-pill.active {
  background: var(--accent-primary);
  color: #ffffff !important;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}