/* ========================================
   Marco Linori Marrelli - Portfolio CV
   Modern Minimalist Design
   ======================================== */

/* CSS Variables */
:root {
  /* Colors */
  --color-bg: #fafafa;
  --color-bg-alt: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b7280;
  --color-accent: #4F46E5;
  --color-accent-hover: #4338CA;
  --color-border: #e5e7eb;
  --color-card: #ffffff;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 72px;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  --transition: 0.2s ease;
}

/* Dark mode - toggle class */
body.dark-mode {
  --color-bg: #0f0f0f;
  --color-bg-alt: #1a1a1a;
  --color-text: #f5f5f5;
  --color-text-muted: #a1a1aa;
  --color-border: #27272a;
  --color-card: #1a1a1a;
  --color-accent: #43B02A;
  --color-accent-hover: #5ACC35;
}

/* Dark mode header background */
body.dark-mode .header {
  background: rgba(15, 15, 15, 0.9);
}


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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

/* Container */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.3;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

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

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

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

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

/* ========================================
   HEADER
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(250, 250, 250, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: flex-start;
}

.logo-main {
  font-size: var(--font-size-xl);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-text);
}

.logo-subtitle {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  gap: var(--space-xl);
}

.nav-menu a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.nav-menu a:hover {
  color: var(--color-text);
}

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

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition);
  text-decoration: none;
}

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

.lang-switch {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  transition: all var(--transition);
}

.lang-switch:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

body.dark-mode .lang-switch {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--color-text);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text);
  transition: all var(--transition);
}

.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.theme-toggle .icon-moon {
  display: none;
}

body.dark-mode .theme-toggle .icon-sun {
  display: none;
}

body.dark-mode .theme-toggle .icon-moon {
  display: block;
}


.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
    background: var(--color-bg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
  }

  .nav-menu.active {
    opacity: 1;
    visibility: visible;
  }

  .nav-menu a {
    font-size: var(--font-size-xl);
  }

  .nav-toggle {
    display: flex;
  }

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

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* ========================================
   HERO
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-greeting {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  font-weight: 400;
  margin-bottom: var(--space-md);
}

.hero-location {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.hero-location svg {
  flex-shrink: 0;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 500px;
  margin-bottom: var(--space-xl);
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
}

.tech-stack-link {
  background: none;
  border: none;
  color: var(--color-accent);
  font-size: 0.875rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 0;
  margin-top: 1rem;
  transition: all 0.2s ease;
  opacity: 0.85;
  width: fit-content;
  font-family: inherit;
}

.tech-stack-link:hover {
  opacity: 1;
  transform: translateX(4px);
}

.tech-stack-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  align-items: center;
}

.hero-image {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}

.profile-photo-large {
  width: 100%;
  height: auto;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xl);
  border: 4px solid var(--color-accent);
  transition: transform var(--transition), box-shadow var(--transition);
}

.profile-photo-large:hover {
  transform: scale(1.05);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  width: 100%;
}

.stat {
  text-align: center;
  padding: var(--space-xl);
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-number {
  display: block;
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

@media (max-width: 968px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

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

  .tech-stack-link {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-image {
    max-width: 200px;
  }

  .hero-stats {
    max-width: 400px;
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
  }
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
  padding: var(--space-3xl) 0;
}

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

.section-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-2xl);
  text-align: center;
}

/* ========================================
   ABOUT
   ======================================== */
.about-content {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-image {
  width: 150px;
}

.profile-photo-small {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 3px solid var(--color-accent);
}

.about-text p {
  margin-bottom: var(--space-lg);
  color: var(--color-text-muted);
}

.about-text strong {
  color: var(--color-text);
}

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.highlight {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.highlight-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

.highlight h4 {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.highlight p {
  font-weight: 500;
}

@media (max-width: 968px) {
  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-image {
    width: 120px;
    margin: 0 auto var(--space-lg) auto;
  }

  .about-highlights {
    margin: 0 auto;
    max-width: 500px;
  }
}

/* ========================================
   TIMELINE (Experience)
   ======================================== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

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

.timeline-item {
  position: relative;
  padding-left: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: -5px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
  border: 2px solid var(--color-bg-alt);
}

.timeline-content {
  background: var(--color-card);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.timeline-header h3 {
  font-size: var(--font-size-lg);
}

.timeline-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.timeline-role {
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.timeline-description {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.timeline-tags span {
  padding: var(--space-xs) var(--space-sm);
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

@media (max-width: 480px) {
  .timeline::before {
    left: 5px;
  }

  .timeline-marker {
    left: 0;
  }

  .timeline-item {
    padding-left: var(--space-xl);
  }
}

/* ========================================
   SKILLS
   ======================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.skill-card {
  background: var(--color-card);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.skill-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.skill-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
}

.skill-card ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.skill-card li {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.skill-card li strong {
  color: var(--color-text);
}

/* Certifications */
.certifications {
  text-align: center;
}

.certifications h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-lg);
}

.cert-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

.cert-badge {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition);
  cursor: default;
}

a.cert-badge {
  cursor: pointer;
}

a.cert-badge:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.cert-link {
  margin-top: var(--space-xl);
  text-align: center;
}

.cert-link .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.cert-link svg {
  flex-shrink: 0;
}

@media (max-width: 968px) {
  .skills-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   CONTACT
   ======================================== */
.contact-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all var(--transition);
}

.contact-link:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
}

.contact-hint {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: var(--space-xl) 0;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.footer p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ========================================
   CHATBOT WIDGET
   ======================================== */
#chatbot {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 1000;
}

/* Chat Button */
.chat-button {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: var(--color-accent);
  color: white;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.chat-button:hover {
  background: var(--color-accent-hover);
  transform: scale(1.05);
}

.chat-button .chat-icon-close {
  display: none;
}

.chat-button.active .chat-icon-open {
  display: none;
}

.chat-button.active .chat-icon-close {
  display: block;
}

/* Chat Window */
.chat-window {
  position: absolute;
  bottom: 86px;
  right: 0;
  width: 380px;
  max-height: 520px;
  background: var(--color-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transition: all var(--transition);
}

.chat-window.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

/* Chat Header */
.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent);
  color: white;
}

.chat-header-info {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.chat-avatar {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

.chat-header h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
}

.chat-status {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

.chat-clear {
  background: none;
  border: none;
  color: white;
  cursor: pointer;
  padding: var(--space-sm);
  opacity: 0.8;
  transition: opacity var(--transition);
}

.chat-clear:hover {
  opacity: 1;
}

/* Chat Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  min-height: 300px;
  max-height: 350px;
}

.chat-message {
  display: flex;
  gap: var(--space-sm);
  max-width: 85%;
}

.chat-message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.message-content {
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.chat-message.bot .message-content {
  background: var(--color-bg);
  border-bottom-left-radius: var(--radius-sm);
}

.chat-message.user .message-content {
  background: var(--color-accent);
  color: white;
  border-bottom-right-radius: var(--radius-sm);
}

.message-content p {
  margin: 0;
}

/* Chat Suggestions */
.chat-suggestions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.suggestion-btn {
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
}

.suggestion-btn:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
  transform: translateX(4px);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 4px;
  padding: var(--space-md);
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--color-text-muted);
  border-radius: 50%;
  animation: typing 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing {
  0%, 60%, 100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(-4px);
  }
}

/* Chat Input */
.chat-input-container {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.chat-input {
  flex: 1;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: var(--font-size-sm);
  outline: none;
  transition: border-color var(--transition);
}

.chat-input:focus {
  border-color: var(--color-accent);
}

.chat-send {
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.chat-send:hover {
  background: var(--color-accent-hover);
}

.chat-send:disabled {
  background: var(--color-border);
  cursor: not-allowed;
}

/* Chat Footer */
.chat-footer {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  font-size: 11px;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.footer-separator {
  color: var(--color-text-muted);
  opacity: 0.5;
}

.footer-link {
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  font-size: 11px;
  font-weight: 500;
  text-decoration: underline;
  padding: 0;
  white-space: nowrap;
}

.footer-link:hover {
  color: var(--color-accent-hover);
  text-decoration: none;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
  margin: 0;
  font-size: var(--font-size-xl);
}

.modal-close {
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: var(--radius-md);
  transition: background var(--transition);
}

.modal-close:hover {
  background: var(--color-bg-alt);
}

.modal-body {
  padding: var(--space-lg);
  overflow-y: auto;
  flex: 1;
}

.modal-body h3 {
  font-size: var(--font-size-lg);
  margin-top: 0;
  margin-bottom: var(--space-md);
}

.modal-body h4 {
  font-size: var(--font-size-base);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-accent);
}

.modal-body p {
  margin-bottom: var(--space-md);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.modal-body ul {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
  list-style: disc;
}

.modal-body li {
  margin-bottom: var(--space-sm);
  color: var(--color-text-muted);
}

.modal-body a {
  color: var(--color-accent);
  text-decoration: underline;
}

.modal-body a:hover {
  color: var(--color-accent-hover);
}

.modal-body strong {
  color: var(--color-text);
  font-weight: 600;
}

.tech-footer {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  font-style: italic;
}

/* Mobile Chat */
@media (max-width: 480px) {
  #chatbot {
    bottom: var(--space-md);
    right: var(--space-md);
  }

  .chat-window {
    position: fixed;
    bottom: 0;
    right: 0;
    left: 0;
    width: 100%;
    max-height: 100%;
    height: 100%;
    border-radius: 0;
  }

  .chat-messages {
    max-height: none;
    flex: 1;
  }
}

/* Scrollbar */
.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}