/* ============================================
   MANFRED SCHMIDT - Personal CV Website
   Material Design + Liquid Glass Elements
   ============================================ */

/* ============================================
   CSS VARIABLES - Brand Colors & Typography
   ============================================ */
:root {
  /* Primary Colors - from Logo (Blue M-shape) */
  --primary-blue: #2E7AB8;
  --primary-dark: #1E5A8A;
  --primary-light: #4A9AD8;
  
  /* Accent Colors - from Logo (Yellow eye/mustache) */
  --accent-yellow: #F4C542;
  --accent-gold: #D4A522;
  
  /* Secondary Colors - from Logo (Olive green pupil) */
  --secondary-olive: #8B9A6B;
  --secondary-light: #A8B88A;
  
  /* Neutrals */
  --white: #FFFFFF;
  --off-white: #F8F9FA;
  --light-gray: #F5F5F5;
  --medium-gray: #E0E0E0;
  --dark-gray: #424242;
  --text-primary: #212121;
  --text-secondary: #757575;
  
  /* Liquid Glass Effects */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.3);
  --glass-shadow: rgba(0, 0, 0, 0.1);
  
  /* Semantic Colors */
  --color-success: #4CAF50;
  --color-warning: var(--accent-yellow);
  --color-error: #EA4335;
  
  /* Typography - Titillium Web like Sandro's page */
  --font-primary: 'Titillium Web', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Titillium Web', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.25s ease-out;
  --transition-slow: 0.4s ease-out;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);
}

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

html {
  font-size: 14px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-primary);
  color: var(--text-primary);
  line-height: 1.6;
  background-color: var(--light-gray);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* GPU acceleration for animated elements */
.navbar,
.navbar-island,
.navbar-menu-mobile,
.card,
.btn,
.skill-progress {
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

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

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

ul {
  list-style: none;
}

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

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
}

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

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
  font-size: 1.5rem;
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-yellow));
  margin: var(--spacing-sm) auto 0;
  border-radius: 2px;
}

.section-title-sub {
  margin-top: var(--spacing-xl);
}

.section-subtitle {
  text-align: center;
  margin: var(--spacing-lg) 0 var(--spacing-md);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 1.1rem;
}

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.navbar-logo .logo-img {
  height: 50px;
  width: auto;
}

.navbar-island {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xs) var(--spacing-md);
  box-shadow: var(--shadow-sm);
}

.navbar-menu {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.navbar-menu a {
  color: var(--text-primary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.navbar-menu a:hover {
  color: var(--primary-blue);
  background: var(--light-gray);
}

.navbar-menu-mobile {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: var(--white);
  flex-direction: column;
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  gap: var(--spacing-xs);
}

.navbar-menu-mobile.active {
  display: flex;
}

.navbar-menu-mobile a {
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
}

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.hamburger-line {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

@media (max-width: 900px) {
  .navbar-island,
  .navbar-menu-desktop {
    display: none;
  }
  
  .navbar-toggle {
    display: flex;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(80px + var(--spacing-xl)) var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 50%, var(--off-white) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(46, 122, 184, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 700px;
  position: relative;
  z-index: 1;
}

.hero-logo {
  margin-bottom: var(--spacing-lg);
}

.hero-logo-img {
  width: 180px;
  height: auto;
  margin: 0 auto;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: var(--spacing-xs);
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--accent-gold);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
  color: var(--white);
  box-shadow: 0 4px 15px rgba(46, 122, 184, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(46, 122, 184, 0.4);
  color: var(--white);
}

.hero-cta {
  font-size: 1.1rem;
  padding: var(--spacing-md) var(--spacing-xl);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-lg);
  align-items: start;
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.about-image {
  position: relative;
}

.profile-img {
  width: 100%;
  max-width: 280px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  margin: 0 auto;
}

.about-content {
  padding: var(--spacing-sm) 0;
}

.about-intro {
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.about-content h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
  color: var(--primary-blue);
}

.about-list {
  margin-bottom: var(--spacing-md);
}

.about-list li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-sm);
  position: relative;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.about-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--secondary-olive);
  font-weight: bold;
}

.language-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

@media (max-width: 768px) {
  .language-tags {
    justify-content: center;
  }
}

.tag {
  background: var(--light-gray);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-primary);
}

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

/* ============================================
   TIMELINE (LEBENSLAUF)
   ============================================ */
.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-left: var(--spacing-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-blue), var(--secondary-olive));
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.timeline-marker {
  position: absolute;
  left: calc(-1 * var(--spacing-lg) + 2px);
  top: 5px;
  width: 14px;
  height: 14px;
  background: var(--white);
  border: 2px solid var(--primary-blue);
  border-radius: 50%;
  z-index: 1;
}

.timeline-marker.current {
  background: var(--accent-yellow);
  border-color: var(--accent-gold);
  box-shadow: 0 0 0 3px rgba(244, 197, 66, 0.3);
}

.timeline-marker.education {
  background: var(--secondary-olive);
  border-color: var(--secondary-light);
}

.timeline-content {
  background: var(--white);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.timeline-content:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(3px);
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
  flex-wrap: wrap;
}

.timeline-date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.timeline-badge {
  background: var(--accent-yellow);
  color: var(--text-primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
}

.timeline-title {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  color: var(--primary-dark);
}

.timeline-company {
  color: var(--primary-blue);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  font-size: 0.85rem;
}

.timeline-details {
  margin-top: var(--spacing-xs);
}

.timeline-details li {
  padding: 2px 0;
  padding-left: var(--spacing-sm);
  position: relative;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.timeline-details li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-blue);
}

/* ============================================
   SKILLS SECTION
   ============================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.skill-category {
  background: var(--light-gray);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
}

.skill-category-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.skill-category-title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--primary-blue);
  border-radius: 2px;
}

.skill-bars {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.skill-item {
  width: 100%;
}

.skill-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--spacing-xs);
}

.skill-name {
  font-weight: 500;
  color: var(--text-primary);
}

.skill-percent {
  font-weight: 600;
  color: var(--primary-blue);
}

.skill-bar {
  height: 10px;
  background: var(--medium-gray);
  border-radius: 5px;
  overflow: hidden;
}

.skill-progress {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-blue), var(--primary-light));
  border-radius: 5px;
  width: 0;
  transition: width 1s ease-out;
}

.skill-progress.animated {
  width: var(--progress-width);
}

/* Tools Infinite Scroll */
.tools-scroll-container {
  overflow: hidden;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-md) 0;
  mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}

.tools-scroll-track {
  display: flex;
  gap: var(--spacing-md);
  animation: scrollTools 40s linear infinite;
  width: max-content;
}

.tools-scroll-track:hover {
  animation-play-state: paused;
}

@keyframes scrollTools {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.tool-card {
  background: var(--white);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  white-space: nowrap;
  flex-shrink: 0;
}

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

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

/* ============================================
   PORTFOLIO SECTION
   ============================================ */
.section-intro {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  font-size: 0.95rem;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.portfolio-item {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.portfolio-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.portfolio-preview {
  position: relative;
  width: 100%;
  height: 160px;
  overflow: hidden;
  background: var(--light-gray);
}

.portfolio-preview iframe {
  width: 200%;
  height: 200%;
  transform: scale(0.5);
  transform-origin: top left;
  border: none;
  pointer-events: none;
}

.portfolio-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.portfolio-item:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--accent-gold);
  color: var(--white);
  text-decoration: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.portfolio-link:hover {
  background: var(--accent-yellow);
  transform: scale(1.05);
}

.portfolio-link svg {
  width: 14px;
  height: 14px;
}

.portfolio-title {
  padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-xs);
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 600;
}

.portfolio-desc {
  padding: 0 var(--spacing-sm) var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.8rem;
}

/* ============================================
   CERTIFICATES SECTION
   ============================================ */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--spacing-md);
}

.certificate-card {
  background: var(--white);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--transition-normal);
  border-top: 3px solid var(--primary-blue);
}

.certificate-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.certificate-icon {
  font-size: 1.8rem;
  margin-bottom: var(--spacing-xs);
}

.certificate-title {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.certificate-issuer {
  color: var(--primary-blue);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.certificate-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* References */
.references-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.reference-card {
  background: var(--light-gray);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-align: center;
}

.reference-icon {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
}

.reference-card h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.reference-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Testimonial */
.testimonial {
  max-width: 800px;
  margin: 0 auto;
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  color: var(--white);
  text-align: center;
}

.testimonial blockquote {
  font-size: 1.1rem;
  font-style: italic;
  line-height: 1.8;
  margin-bottom: var(--spacing-lg);
  position: relative;
}

.testimonial blockquote::before {
  content: '"';
  font-size: 4rem;
  position: absolute;
  top: -20px;
  left: -10px;
  opacity: 0.3;
  font-family: Georgia, serif;
}

.testimonial cite {
  font-style: normal;
}

.testimonial cite strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}

.testimonial cite small {
  opacity: 0.8;
}

/* ============================================
   ACTIVITIES SECTION
   ============================================ */
.activities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.activity-card {
  background: var(--light-gray);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.activity-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}

.activity-card.coaching::before {
  background: linear-gradient(90deg, var(--secondary-olive), var(--secondary-light));
}

.activity-card.firefighter::before {
  background: linear-gradient(90deg, #E53935, #FF7043);
}

.activity-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.activity-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.activity-title {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.activity-period {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.activity-list {
  text-align: left;
  max-width: 200px;
  margin: 0 auto;
}

.activity-list li {
  padding: var(--spacing-xs) 0;
  color: var(--text-secondary);
}

.activity-list li::before {
  content: '• ';
  color: var(--secondary-olive);
}

.activity-motto {
  font-style: italic;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Hobbies */
.hobbies-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.hobby-tag {
  background: var(--white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-xl);
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.hobby-tag:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  max-width: 900px;
  margin: 0 auto;
}

.contact-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.contact-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.contact-card a {
  color: var(--primary-blue);
  font-weight: 500;
  word-break: break-word;
}

.contact-card p {
  color: var(--text-secondary);
  margin: 0;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--text-primary);
  color: var(--white);
  padding: var(--spacing-lg) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

@media (max-width: 600px) {
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

.footer-copyright {
  color: var(--medium-gray);
  margin: 0;
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-links a {
  color: var(--medium-gray);
  transition: color var(--transition-fast);
}

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

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */
@media (max-width: 768px) {
  .section {
    padding: var(--spacing-xl) 0;
  }
  
  .timeline {
    padding-left: var(--spacing-lg);
  }
  
  .timeline::before {
    left: 5px;
  }
  
  .timeline-marker {
    left: calc(-1 * var(--spacing-lg) + 0px);
    width: 14px;
    height: 14px;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .certificates-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-logo-img {
    width: 140px;
  }
  
  .hero-cta {
    width: 100%;
  }
  
  .tools-scroll-track {
    animation-duration: 25s;
  }
}

/* ============================================
   SIDEBAR LAYOUT - Like Sandro's Website
   ============================================ */

/* Top Bar */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid var(--medium-gray);
  padding: var(--spacing-sm) var(--spacing-lg);
}

.topbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 100%;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: var(--text-primary);
  padding-left: 60px;
}

.topbar-logo {
  height: 40px;
  width: auto;
}

.topbar-name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Mobile Toggle Button */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 1001;
}

.mobile-toggle__line {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-toggle.is-active .mobile-toggle__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.is-active .mobile-toggle__line:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.is-active .mobile-toggle__line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Page Layout with Sidebar */
.page-layout {
  display: flex;
  min-height: 100vh;
  padding-top: 70px;
  max-width: 1400px;
  margin: 0 auto;
  padding-left: 40px;
  padding-right: 40px;
}

/* Left Sidebar */
.sidebar {
  width: 200px;
  flex-shrink: 0;
  padding: var(--spacing-lg) var(--spacing-md);
  position: sticky;
  top: 70px;
  height: calc(100vh - 70px);
  overflow-y: auto;
}

.sidebar-nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.sidebar-nav__link {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: block;
  padding: var(--spacing-xs) 0;
}

.sidebar-nav__link:hover,
.sidebar-nav__link:focus {
  color: var(--primary-blue);
}

.sidebar-nav__link.active,
.sidebar-nav__link--active {
  color: var(--primary-blue);
  font-weight: 600;
}

/* Main Content Area */
.main-content {
  flex: 1;
  min-width: 0;
  padding: var(--spacing-md) var(--spacing-md);
  max-width: 900px;
}

/* Intro Section (replaces Hero) */
.intro-section {
  padding: var(--spacing-lg) 0;
  margin-bottom: var(--spacing-lg);
}

.intro-content {
  max-width: 700px;
}

.intro-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.intro-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.25rem);
  color: var(--accent-gold);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.intro-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 550px;
}

/* Adjust sections for sidebar layout */
.page-layout .section {
  padding: var(--spacing-lg) 0;
}

/* First section should have less top padding */
.page-layout .section:first-child,
.main-content > .section:first-child {
  padding-top: var(--spacing-sm);
}

.page-layout .section-alt {
  background: transparent;
  margin-left: calc(-1 * var(--spacing-lg));
  margin-right: calc(-1 * var(--spacing-lg));
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
  background-color: var(--off-white);
}

.page-layout .container {
  max-width: 100%;
  padding: 0;
}

.page-layout .section-title {
  text-align: left;
}

.page-layout .section-title::after {
  margin: var(--spacing-sm) 0 0;
}

/* Hide old navbar */
.navbar {
  display: none;
}

/* Hide old hero */
.hero {
  display: none;
}

/* Tablet: Reduced margins and sidebar */
@media (max-width: 1024px) {
  .topbar-brand {
    padding-left: 10px;
  }
  
  .page-layout {
    padding-left: 20px;
    padding-right: 20px;
  }
  
  .sidebar {
    width: 180px;
    padding-left: 10px;
  }
  
  .main-content {
    padding-right: 10px;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
  }
  
  .activities-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile: Sidebar becomes horizontal or hidden */
@media (max-width: 767px) {
  .mobile-toggle {
    display: flex;
  }
  
  .topbar {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .topbar-brand {
    padding-left: 0;
  }
  
  .topbar-name {
    display: none;
  }
  
  .topbar-logo {
    height: 32px;
  }
  
  .page-layout {
    flex-direction: column;
    padding-left: 0;
    padding-right: 0;
  }
  
  .sidebar {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    width: 100%;
    height: auto;
    max-height: calc(100vh - 56px);
    padding: var(--spacing-md);
    background: var(--white);
    border-bottom: 1px solid var(--medium-gray);
    z-index: 999;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
  }
  
  .sidebar.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .sidebar-nav__list {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
  
  .sidebar-nav__link {
    font-size: 1rem;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
  }
  
  .sidebar-nav__link:hover {
    background: var(--light-gray);
  }
  
  .main-content {
    padding: var(--spacing-sm);
    padding-top: var(--spacing-md);
    max-width: 100%;
  }
  
  .page-layout .section-alt {
    margin-left: calc(-1 * var(--spacing-sm));
    margin-right: calc(-1 * var(--spacing-sm));
    padding-left: var(--spacing-sm);
    padding-right: var(--spacing-sm);
  }
  
  .section-title {
    font-size: 1.25rem;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .profile-img {
    max-width: 200px;
  }
  
  .timeline {
    padding-left: var(--spacing-md);
  }
  
  .timeline::before {
    left: 3px;
  }
  
  .timeline-marker {
    left: calc(-1 * var(--spacing-md) + 0px);
    width: 10px;
    height: 10px;
  }
  
  .timeline-content {
    padding: var(--spacing-sm);
  }
  
  .timeline-title {
    font-size: 0.9rem;
  }
  
  .timeline-company {
    font-size: 0.8rem;
  }
  
  .timeline-details li {
    font-size: 0.75rem;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .skill-category {
    padding: var(--spacing-md);
  }
  
  .portfolio-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .certificates-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  .certificate-card {
    padding: var(--spacing-sm);
  }
  
  .activities-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .activity-card {
    padding: var(--spacing-lg);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .contact-card {
    padding: var(--spacing-md);
  }
  
  .testimonial {
    padding: var(--spacing-md);
  }
  
  .testimonial blockquote {
    font-size: 0.95rem;
  }
  
  .references-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
  
  .topbar {
    padding: var(--spacing-xs);
  }
  
  .topbar-logo {
    height: 28px;
  }
  
  .main-content {
    padding: var(--spacing-xs);
  }
  
  .sidebar-nav__link {
    font-size: 0.9rem;
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  
  .section {
    padding: var(--spacing-md) 0;
  }
  
  .section-title {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
  }
  
  .about-intro {
    font-size: 0.85rem;
  }
  
  .profile-img {
    max-width: 160px;
  }
  
  .timeline-content {
    padding: var(--spacing-xs);
  }
  
  .timeline-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }
  
  .portfolio-preview {
    height: 140px;
  }
  
  .portfolio-title {
    font-size: 0.85rem;
  }
  
  .portfolio-desc {
    font-size: 0.75rem;
  }
  
  .activity-card {
    padding: var(--spacing-md);
  }
  
  .activity-icon {
    font-size: 2rem;
  }
  
  .activity-title {
    font-size: 1.1rem;
  }
  
  .hobby-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.85rem;
  }
  
  .contact-icon {
    font-size: 1.8rem;
  }
  
  .contact-card h3 {
    font-size: 0.95rem;
  }
  
  .tool-card {
    padding: var(--spacing-sm);
  }
  
  .tool-name {
    font-size: 0.8rem;
  }
  
  .language-tags {
    gap: var(--spacing-xs);
  }
  
  .tag {
    font-size: 0.8rem;
    padding: 4px 8px;
  }
}

/* Extra small screens */
@media (max-width: 360px) {
  html {
    font-size: 12px;
  }
  
  .topbar-logo {
    height: 24px;
  }
  
  .profile-img {
    max-width: 140px;
  }
  
  .timeline {
    padding-left: var(--spacing-sm);
  }
  
  .timeline-marker {
    width: 8px;
    height: 8px;
    left: calc(-1 * var(--spacing-sm) + 0px);
  }
}

/* Mobile toggle active state */
.mobile-toggle.active .mobile-toggle__line:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active .mobile-toggle__line:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active .mobile-toggle__line:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Ensure images don't overflow on mobile */
img {
  max-width: 100%;
  height: auto;
}

/* Fix horizontal scroll issues */
body {
  overflow-x: hidden;
}

.container,
.main-content,
.section {
  overflow-x: hidden;
}