/* ==========================================================================
   Yeiner Aguirre — Personal Website
   Modern Professional CV Design
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
  /* Brand Colors */
  --color-cherry: #ba3b46;
  --color-teal: #587d71;
  --color-amber: #ff9900;
  --color-cream: #e7efc5;
  --color-ink: #051014;
  --color-white: #ffffff;

  /* Sidebar */
  --sidebar-width: 280px;
  --sidebar-width-collapsed: 0px;
}

/* --------------------------------------------------------------------------
   Theme: Brand Colors (Default)
   -------------------------------------------------------------------------- */
:root,
[data-theme="brand"] {
  --color-bg-body: #0d1a1f;
  --color-bg-sidebar: var(--color-ink);
  --color-bg-main: #0f1e24;
  --color-bg-card: #162a32;
  --color-bg-card-hover: #1d3640;
  --color-text-primary: var(--color-cream);
  --color-text-secondary: #b8c4c0;
  --color-text-muted: #7a8a85;
  --color-text-inverse: var(--color-ink);
  --color-bg-primary: var(--color-bg-main);
  --color-bg-subtle: var(--color-bg-card);
  --color-bg-dark: var(--color-ink);
  --color-border: #2a3f47;
  --color-border-hover: #3d5a65;
  --color-accent: var(--color-cherry);
  --color-accent-secondary: var(--color-teal);
  --color-accent-glow: rgba(186, 59, 70, 0.15);
  --color-highlight: var(--color-amber);
}

/* --------------------------------------------------------------------------
   Theme: Dark
   -------------------------------------------------------------------------- */
[data-theme="dark"] {
  --color-bg-body: #0a0f12;
  --color-bg-sidebar: var(--color-ink);
  --color-bg-main: #0d1418;
  --color-bg-card: #141c22;
  --color-bg-card-hover: #1a252d;
  --color-text-primary: var(--color-cream);
  --color-text-secondary: #a8b4b0;
  --color-text-muted: #6a7a75;
  --color-text-inverse: var(--color-ink);
  --color-bg-primary: var(--color-bg-main);
  --color-bg-subtle: var(--color-bg-card);
  --color-bg-dark: var(--color-ink);
  --color-border: #252f35;
  --color-border-hover: #354550;
  --color-accent: var(--color-cherry);
  --color-accent-secondary: var(--color-teal);
  --color-accent-glow: rgba(186, 59, 70, 0.12);
  --color-highlight: var(--color-amber);
}

/* --------------------------------------------------------------------------
   Theme: Light
   -------------------------------------------------------------------------- */
[data-theme="light"] {
  --color-bg-body: #ffffff;
  --color-bg-sidebar: #f8f9fa;
  --color-bg-main: #ffffff;
  --color-bg-card: #f8f9fa;
  --color-bg-card-hover: #f0f1f2;
  --color-text-primary: var(--color-ink);
  --color-text-secondary: #4a4a4a;
  --color-text-muted: #717171;
  --color-text-inverse: var(--color-white);
  --color-bg-primary: var(--color-white);
  --color-bg-subtle: #f8f9fa;
  --color-bg-dark: var(--color-ink);
  --color-border: #e8e8e8;
  --color-border-hover: #d0d0d0;
  --color-accent: var(--color-cherry);
  --color-accent-secondary: var(--color-teal);
  --color-accent-glow: rgba(186, 59, 70, 0.08);
  --color-highlight: var(--color-amber);
}

/* --------------------------------------------------------------------------
   Typography & Spacing (shared across themes)
   -------------------------------------------------------------------------- */
:root {
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-md: 18px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 40px;
  --font-size-4xl: 56px;
  --font-size-5xl: 72px;
  --line-height-tight: 1.15;
  --line-height-snug: 1.3;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.7;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-32: 128px;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 720px;
  --max-width-wide: 1400px;
  --nav-height: 72px;
  --border-radius: 8px;
  --border-radius-lg: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-primary);
  background-color: var(--color-bg-body);
}

/* Hide old top nav when using sidebar layout */
.site-layout .nav {
  display: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

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

/* --------------------------------------------------------------------------
   Site Layout (Sidebar + Main)
   -------------------------------------------------------------------------- */
.site-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background-color: var(--color-bg-sidebar);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-header {
  padding: var(--space-8) var(--space-6);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-avatar {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-4);
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid var(--color-accent);
  background-color: var(--color-bg-card);
}

.sidebar-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sidebar-avatar-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-accent);
  background-color: var(--color-bg-card);
}

.sidebar-name {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.sidebar-title {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-6);
}

.sidebar-nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.sidebar-nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.sidebar-nav-link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-card);
}

.sidebar-nav-link.active {
  color: var(--color-accent);
  background-color: var(--color-accent-glow);
}

.sidebar-nav-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-divider {
  height: 1px;
  margin: var(--space-4) var(--space-4);
  background-color: var(--color-border);
}

.sidebar-connect {
  padding-top: 0;
}

.sidebar-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--color-border);
}

.sidebar-lang-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: var(--space-2);
  background-color: var(--color-bg-card);
  border-radius: var(--border-radius);
}

.sidebar-lang {
  padding: var(--space-2) var(--space-3);
  border-radius: 4px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-lang:hover {
  color: var(--color-text-primary);
}

.sidebar-lang.active {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* Main Content Area */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  background-color: var(--color-bg-main);
  min-height: 100vh;
}

/* Mobile Sidebar Toggle */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 200;
  width: 44px;
  height: 44px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: var(--space-3);
}

.sidebar-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

.sidebar-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.sidebar-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.sidebar-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Sidebar Overlay (Mobile) */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  z-index: 90;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.sidebar-overlay.active {
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  letter-spacing: -1.5px;
}

h2 {
  font-size: var(--font-size-2xl);
  letter-spacing: -0.5px;
}

h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-muted);
}

p {
  margin-bottom: 1em;
}

p:last-child {
  margin-bottom: 0;
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-muted {
  color: var(--color-text-muted);
}

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

.text-small {
  font-size: var(--font-size-sm);
}

.text-large {
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.page-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.page-wrapper-narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-24) 0;
}

.section-sm {
  padding: var(--space-16) 0;
}

.section-lg {
  padding: var(--space-32) 0;
}

.section-alt {
  background-color: var(--color-bg-card);
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: var(--nav-height);
}

.nav-logo {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text-primary);
  letter-spacing: -0.3px;
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-center {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-subtle);
}

.nav-link.active {
  color: var(--color-text-primary);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-bg-subtle);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.nav-lang {
  padding: var(--space-1) var(--space-2);
  border-radius: 4px;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-lang:hover {
  color: var(--color-text-primary);
}

.nav-lang.active {
  background-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Mobile Navigation */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  margin-right: calc(var(--space-2) * -1);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-primary);
  margin: 4px 0;
  transition: transform var(--transition-fast);
  border-radius: 1px;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding-top: var(--space-24);
  padding-bottom: var(--space-24);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

/* Hero with photo layout */
.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--space-16);
  align-items: center;
  max-width: var(--max-width);
}

.hero-photo {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-photo-wrapper {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--color-accent);
  box-shadow: 0 0 40px var(--color-accent-glow);
  background-color: var(--color-bg-card);
}

.hero-photo-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-photo-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 80px;
  font-weight: 700;
  color: var(--color-accent);
  background-color: var(--color-bg-card);
}

.hero-container {
  max-width: var(--max-width-narrow);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-eyebrow::before {
  content: '';
  width: 24px;
  height: 2px;
  background-color: var(--color-accent);
}

.hero-name {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  letter-spacing: -2px;
  margin-bottom: var(--space-4);
  line-height: 1;
}

.hero-title {
  font-size: var(--font-size-xl);
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  line-height: var(--line-height-snug);
}

.hero-statement {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  max-width: 560px;
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-10);
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-12);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1;
}

.hero-stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-ink);
  color: var(--color-white);
}

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

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

.btn-secondary:hover {
  border-color: var(--color-text-primary);
  background-color: var(--color-bg-subtle);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  padding: var(--space-2) var(--space-3);
}

.btn-ghost:hover {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Section Headers
   -------------------------------------------------------------------------- */
.section-header {
  margin-bottom: var(--space-12);
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--space-4);
}

.section-eyebrow::before {
  content: '';
  width: 32px;
  height: 2px;
  background-color: var(--color-accent);
}

.section-title {
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  max-width: 560px;
  line-height: var(--line-height-relaxed);
}

/* --------------------------------------------------------------------------
   Principles
   -------------------------------------------------------------------------- */
.principles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
}

.principle-card {
  padding: var(--space-8);
  background-color: var(--color-bg-subtle);
  border-radius: var(--border-radius-lg);
  border: 1px solid transparent;
  transition: all var(--transition-base);
}

.principle-card:hover {
  border-color: var(--color-border);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.principle-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: var(--space-4);
}

.principle-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-3);
}

.principle-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* --------------------------------------------------------------------------
   Projects
   -------------------------------------------------------------------------- */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.project-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.project-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-6);
  padding: var(--space-8);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
}

.project-card-link:hover .project-card,
.project-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.project-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-border);
  line-height: 1;
  min-width: 60px;
}

.project-content {
  flex: 1;
}

.project-name {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2);
}

.project-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.project-meta-divider {
  width: 4px;
  height: 4px;
  background-color: var(--color-border);
  border-radius: 50%;
}

.project-context {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.project-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--color-bg-subtle);
  border-radius: 50%;
  color: var(--color-text-muted);
  transition: all var(--transition-fast);
  align-self: center;
}

.project-card:hover .project-arrow {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* Project Detail (Full Page) */
.project-block {
  padding: var(--space-12) 0;
  border-bottom: 1px solid var(--color-border);
  scroll-margin-top: var(--space-8);
}

.project-block:first-child {
  padding-top: 0;
}

.project-block:last-child {
  border-bottom: none;
}

.project-header {
  margin-bottom: var(--space-8);
}

.project-role {
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-top: var(--space-2);
}

.project-section {
  margin-top: var(--space-8);
}

.project-section h4 {
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}

.project-technologies {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.tech-tag {
  padding: var(--space-1) var(--space-3);
  background-color: var(--color-bg-subtle);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
}

/* --------------------------------------------------------------------------
   Certifications
   -------------------------------------------------------------------------- */
.certifications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
}

.cert-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5);
  background-color: var(--color-bg-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.cert-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

.cert-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  flex-shrink: 0;
}

.cert-icon svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
}

.cert-content {
  flex: 1;
  min-width: 0;
}

.cert-name {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
  line-height: var(--line-height-snug);
}

.cert-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.cert-issuer {
  color: var(--color-text-secondary);
}

.cert-year {
  color: var(--color-text-muted);
}

.cert-category {
  display: inline-block;
  padding: 2px 6px;
  background-color: var(--color-accent);
  color: var(--color-white);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Certifications Full Page */
[data-page="certifications"] .certifications-grid {
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-6);
}

.cert-card-full {
  padding: var(--space-8);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
}

.cert-card-full:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.cert-card-full .cert-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.cert-card-full .cert-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0;
  line-height: var(--line-height-snug);
}

.cert-card-full .cert-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.cert-card-full .cert-issuer {
  color: var(--color-accent);
  font-weight: 500;
}

.cert-card-full .cert-meta-divider {
  width: 4px;
  height: 4px;
  background-color: var(--color-border);
  border-radius: 50%;
}

.cert-card-full .cert-year {
  color: var(--color-text-muted);
}

.cert-card-full .cert-details {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.cert-card-full .cert-details p {
  margin-bottom: var(--space-2);
}

.cert-card-full .cert-details p:last-child {
  margin-bottom: 0;
}

.cert-card-full .btn-tertiary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  background-color: transparent;
  border: 1px solid var(--color-accent);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  margin-top: var(--space-2);
  width: fit-content;
}

.cert-card-full .btn-tertiary:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Experience
   -------------------------------------------------------------------------- */
.experience-list {
  display: flex;
  flex-direction: column;
}

.experience-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-8);
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--color-border);
}

.experience-item:first-child {
  padding-top: 0;
}

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

.experience-dates {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

.experience-current {
  display: inline-block;
  padding: 2px 8px;
  background-color: var(--color-teal);
  color: var(--color-white);
  border-radius: 4px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  margin-top: var(--space-2);
}

.experience-content {
  flex: 1;
}

.experience-role {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.experience-company {
  font-size: var(--font-size-base);
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: var(--space-4);
}

.experience-summary {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* --------------------------------------------------------------------------
   Education
   -------------------------------------------------------------------------- */
.education-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-6);
  background-color: var(--color-bg-subtle);
  border-radius: var(--border-radius-lg);
}

.education-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-teal);
  border-radius: var(--border-radius);
  flex-shrink: 0;
}

.education-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-white);
}

.education-content {
  flex: 1;
}

.education-degree {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.education-institution {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

.education-years {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

/* --------------------------------------------------------------------------
   About
   -------------------------------------------------------------------------- */
.about-content {
  max-width: var(--max-width-narrow);
}

.about-bio {
  margin-bottom: var(--space-16);
}

.about-bio p {
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-6);
}

.about-bio p:first-child {
  font-size: var(--font-size-xl);
  color: var(--color-text-primary);
  line-height: var(--line-height-snug);
}

.about-subsection {
  margin-top: var(--space-20);
}

.about-subsection-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

/* --------------------------------------------------------------------------
   Links
   -------------------------------------------------------------------------- */
.link {
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: all var(--transition-fast);
}

.link:hover {
  color: var(--color-text-primary);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  transition: all var(--transition-fast);
}

.link-arrow:hover {
  gap: var(--space-3);
}

.link-arrow svg {
  width: 16px;
  height: 16px;
}

.view-all-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-10);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}

.view-all-link:hover {
  color: var(--color-accent);
  gap: var(--space-3);
}

.view-all-link::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.view-all-link:hover::after {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-ink);
  color: var(--color-white);
  padding: var(--space-16) 0;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.footer-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.footer-brand {
  max-width: 600px;
}

.footer-logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.footer-tagline {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  line-height: var(--line-height-relaxed);
}

.footer-links {
  display: flex;
  gap: var(--space-12);
}

.footer-links-group h4 {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.4);
  margin-bottom: var(--space-4);
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-link {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.8);
  transition: all var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copyright {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.4);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.6);
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.footer-social-link svg {
  width: 18px;
  height: 18px;
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.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;
}

.loading {
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.loaded {
  opacity: 1;
}

.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-12) 0;
}

/* --------------------------------------------------------------------------
   Responsive — Tablet (991px)
   -------------------------------------------------------------------------- */
@media (max-width: 991px) {
  :root {
    --font-size-5xl: 56px;
    --font-size-4xl: 44px;
    --font-size-3xl: 32px;
    --sidebar-width: 240px;
  }

  .section {
    padding: var(--space-16) 0;
  }

  .hero {
    padding-top: var(--space-16);
    min-height: auto;
  }

  .hero-layout {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .hero-photo-wrapper {
    width: 200px;
    height: 200px;
  }

  .hero-stats {
    gap: var(--space-8);
    justify-content: center;
  }

  .experience-item {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .experience-dates {
    margin-bottom: var(--space-2);
  }

  .project-card {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .project-number {
    font-size: var(--font-size-xl);
    color: var(--color-accent);
  }

  .project-arrow {
    display: none;
  }

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

  .sidebar-avatar {
    width: 80px;
    height: 80px;
  }
}

/* --------------------------------------------------------------------------
   Responsive — Mobile (767px)
   -------------------------------------------------------------------------- */
@media (max-width: 767px) {
  :root {
    --font-size-5xl: 40px;
    --font-size-4xl: 32px;
    --font-size-3xl: 28px;
    --font-size-2xl: 24px;
  }

  .section {
    padding: var(--space-12) 0;
  }

  .page-wrapper {
    padding: 0 var(--space-5);
  }

  .hero {
    padding-top: var(--space-20);
    padding-bottom: var(--space-12);
  }

  .hero-name {
    font-size: var(--font-size-4xl);
    letter-spacing: -1px;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-6);
  }

  .hero-photo-wrapper {
    width: 160px;
    height: 160px;
  }

  .hero-cta {
    justify-content: center;
  }

  /* Sidebar - Hidden by default on mobile */
  .sidebar {
    transform: translateX(-100%);
    transition: transform var(--transition-base);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-toggle {
    display: flex;
  }

  .sidebar-overlay.active {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  /* Old Navigation (fallback) */
  .nav-center {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-1);
  }

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

  .nav-center .nav-link {
    width: 100%;
    padding: var(--space-3) var(--space-4);
  }

  .nav-toggle {
    display: block;
  }

  /* Principles */
  .principles-grid {
    grid-template-columns: 1fr;
  }

  /* Certifications */
  .certifications-grid,
  [data-page="certifications"] .certifications-grid {
    grid-template-columns: 1fr;
  }

  .cert-card-full {
    padding: var(--space-6);
  }

  .cert-card-full .cert-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }

  .cert-card-full .cert-meta-divider {
    display: none;
  }

  /* Footer */
  .footer-links {
    flex-direction: column;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }
}

/* --------------------------------------------------------------------------
   Responsive — Small Mobile (478px)
   -------------------------------------------------------------------------- */
@media (max-width: 478px) {
  :root {
    --font-size-4xl: 28px;
    --font-size-3xl: 24px;
    --sidebar-width: 100%;
  }

  .page-wrapper {
    padding: 0 var(--space-4);
  }

  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }

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

  .principle-card {
    padding: var(--space-6);
  }

  .sidebar {
    width: 100%;
  }

  .hero-photo-wrapper {
    width: 140px;
    height: 140px;
  }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
  .nav,
  .footer,
  .btn,
  .view-all-link,
  .sidebar,
  .sidebar-toggle,
  .sidebar-overlay {
    display: none !important;
  }

  .main-content {
    margin-left: 0 !important;
  }

  .section {
    padding: var(--space-8) 0;
    page-break-inside: avoid;
  }

  .hero {
    padding-top: 0;
    min-height: auto;
  }

  body {
    font-size: 12pt;
    background-color: white !important;
    color: black !important;
  }

  h1 {
    font-size: 24pt;
  }

  h2 {
    font-size: 18pt;
  }

  h3 {
    font-size: 14pt;
  }

  a {
    color: black !important;
  }

  .project-card,
  .principle-card,
  .cert-card {
    break-inside: avoid;
  }

  .hero-photo {
    display: none;
  }
}