/* Hallmark · shape: Long Document · genre: editorial · theme: Specimen (deal 1/3, adapted for academic simplicity) · redesign: full
 * hero: Ledge · nav: quiet bar · footer: compact colophon · imagery: existing portrait · signature: researcher portrait and project index
 * axes: light/serif/cool · posture: restrained · draw: 98fc10 · v2.0.0 */
/* Hallmark · pre-emit critique: restrained academic document; prioritize readable existing information over display theatrics. */
/* Hallmark · waive 59 · compact academic document requested · large marketing section gaps would hinder scanning. */
/* Hallmark · waive 77 · existing biographical and contact text preserved · extra imagery and sections contradict the requested simplicity. */
/* Hallmark · waive 78 · restrained academic hierarchy requested · section headings remain subordinate to the profile name. */
@import url("../tokens.css");
@import url("../base.css");
/* ==========================================================================
   Samuele Nicolò Straccialini — Portfolio
   Modern Editorial Design System
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Typography Scale (1.25 ratio) */
  --font-family-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-family-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;
  
  --type-size-xs: 0.75rem;    /* 12px */
  --type-size-sm: 0.875rem;   /* 14px */
  --type-size-base: 1rem;     /* 16px */
  --type-size-lg: 1.125rem;   /* 18px */
  --type-size-xl: 1.25rem;    /* 20px */
  --type-size-2xl: 1.5rem;    /* 24px */
  --type-size-3xl: 1.875rem;  /* 30px */
  --type-size-4xl: 2.25rem;   /* 36px */
  --type-size-5xl: 3rem;      /* 48px */
  --type-size-6xl: 3.75rem;   /* 60px */
  
  --type-weight-normal: 400;
  --type-weight-medium: 500;
  --type-weight-semibold: 600;
  --type-weight-bold: 700;
  
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  
  /* Spacing Scale (4px base) */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  
  /* Layout */
  --container-max: 1200px;
  --container-narrow: 720px;
  --header-height: 4rem;
  
  /* Light Theme Colors */
  --color-bg: #fdfcf9;
  --color-bg-subtle: #f8fafc;
  --color-bg-muted: #f1f5f9;
  
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #64748b;
  --color-text-inverse: #fdfcf9;
  
  --color-border: #e2e8f0;
  --color-border-subtle: #f1f5f9;
  
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-accent-subtle: #dbeafe;
  
  --color-success: #16a34a;
  --color-success-subtle: #dcfce7;
  
  --color-link: var(--color-accent);
  --color-link-hover: var(--color-accent-hover);
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-bg-subtle: #1e293b;
  --color-bg-muted: #334155;
  
  --color-text: #f1f5f9;
  --color-text-secondary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #0f172a;
  
  --color-border: #334155;
  --color-border-subtle: #1e293b;
  
  --color-accent: #3b82f6;
  --color-accent-hover: #60a5fa;
  --color-accent-subtle: rgba(59, 130, 246, 0.15);
  
  --color-success: #22c55e;
  --color-success-subtle: rgba(34, 197, 94, 0.15);
}

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

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem; /* Account for fixed header */
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

p, h1, h2, h3, h4, h5, h6 {
  overflow-wrap: break-word;
}

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

ul, ol {
  list-style: none;
}

/* Focus Styles */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-radius: var(--radius-md);
  font-weight: var(--type-weight-medium);
}

.skip-link:focus {
  top: var(--space-4);
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

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

/* --------------------------------------------------------------------------
   Header & Navigation
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: var(--z-sticky);
  transition: box-shadow var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

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

.header__logo {
  font-size: var(--type-size-xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

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

.nav {
  display: none;
}

@media (min-width: 768px) {
  .nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
  }
}

.nav__link {
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.nav__link:hover,
.nav__link.active {
  color: var(--color-text);
}

.nav__link.active {
  position: relative;
}

.nav__link.active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: var(--radius-full);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: background-color var(--transition-fast);
}

.menu-toggle:hover {
  background-color: var(--color-bg-muted);
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle__icon {
  width: 20px;
  height: 20px;
}

/* Mobile Navigation */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg);
  padding: var(--space-6);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  z-index: var(--z-fixed);
}

.mobile-nav--open {
  transform: translateX(0);
}

@media (min-width: 768px) {
  .mobile-nav {
    display: none;
  }
}

.mobile-nav__link {
  display: block;
  padding: var(--space-4) 0;
  font-size: var(--type-size-lg);
  font-weight: var(--type-weight-medium);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.mobile-nav__link:hover,
.mobile-nav__link.active {
  color: var(--color-accent);
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--color-bg-muted);
  color: var(--color-text);
}

.theme-toggle__icon {
  width: 20px;
  height: 20px;
}

.theme-toggle__icon--dark {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--light {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--dark {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle__icon--light {
    display: none;
  }
  
  :root:not([data-theme="light"]) .theme-toggle__icon--dark {
    display: block;
  }
}

/* --------------------------------------------------------------------------
   Main Content
   -------------------------------------------------------------------------- */
main {
  padding-top: var(--header-height);
  min-height: 100vh;
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  padding: var(--space-16) 0 var(--space-12);
  text-align: center;
}

@media (min-width: 768px) {
  .hero {
    padding: var(--space-20) 0 var(--space-16);
  }
}

.hero__content {
  max-width: 720px;
  margin: 0 auto;
}

.hero__avatar {
  width: 128px;
  height: 128px;
  margin: 0 auto var(--space-8);
  border-radius: var(--radius-full);
  background-color: var(--color-bg-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--type-size-2xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text-muted);
  overflow: hidden;
  border: 4px solid var(--color-accent);
  box-shadow: var(--shadow-lg);
}

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

.hero__title {
  font-size: var(--type-size-4xl);
  font-weight: var(--type-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--type-size-5xl);
  }
}

.hero__subtitle {
  font-size: var(--type-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

@media (min-width: 768px) {
  .hero__subtitle {
    font-size: var(--type-size-xl);
  }
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-3);
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background-color: var(--color-success-subtle);
  color: var(--color-success);
  border-radius: var(--radius-full);
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-medium);
  margin-bottom: var(--space-6);
}

.status-badge__dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-success);
  border-radius: var(--radius-full);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@media (prefers-reduced-motion: reduce) {
  .status-badge__dot {
    animation: none;
  }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-medium);
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn--primary:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

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

.btn--secondary:hover:not(:disabled) {
  background-color: var(--color-bg-muted);
  border-color: var(--color-border);
}

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

.btn--ghost:hover:not(:disabled) {
  background-color: var(--color-bg-muted);
  color: var(--color-text);
}

.btn--lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--type-size-base);
}

.btn__icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.btn--lg .btn__icon {
  width: 20px;
  height: 20px;
}

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

@media (min-width: 768px) {
  .section {
    padding: var(--space-16) 0;
  }
}

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

.section__header {
  text-align: center;
  margin-bottom: var(--space-10);
}

.section__title {
  font-size: var(--type-size-2xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .section__title {
    font-size: var(--type-size-3xl);
  }
}

.section__description {
  font-size: var(--type-size-lg);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.card--interactive:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

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

.card__title {
  font-size: var(--type-size-lg);
  font-weight: var(--type-weight-semibold);
  color: var(--color-text);
  line-height: var(--line-height-snug);
}

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

.card__footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-subtle);
}

/* --------------------------------------------------------------------------
   Filter Tabs
   -------------------------------------------------------------------------- */
.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.filter-tab {
  padding: var(--space-2) var(--space-4);
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-medium);
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.filter-tab:hover {
  color: var(--color-text);
  background: var(--color-bg-muted);
}

.filter-tab.active,
.filter-tab[aria-selected="true"] {
  color: var(--color-accent);
  background: var(--color-accent-subtle);
  border-color: var(--color-accent);
}

.filter-tab:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Project card filter */
.project-card.hidden {
  display: none;
}

/* --------------------------------------------------------------------------
   Project Cards
   -------------------------------------------------------------------------- */
.projects-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .projects-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.project-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.project-card__title {
  font-size: var(--type-size-lg);
  font-weight: var(--type-weight-semibold);
  color: var(--color-text);
  line-height: var(--line-height-snug);
  transition: color var(--transition-fast);
}

.card--interactive:hover .project-card__title {
  color: var(--color-accent);
}

.project-card__description {
  font-size: var(--type-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
  flex-grow: 1;
}

.project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

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

/* --------------------------------------------------------------------------
   Project Detail Page
   -------------------------------------------------------------------------- */
.project-header {
  margin-bottom: var(--space-8);
}

.project-header__title {
  font-size: var(--type-size-4xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .project-header__title {
    font-size: var(--type-size-5xl);
  }
}

.project-header__description {
  font-size: var(--type-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-6);
  max-width: 65ch;
}

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

.project-header__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.project-layout {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .project-layout {
    grid-template-columns: 2fr 1fr;
  }
}

.project-content .card {
  height: fit-content;
}

.project-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.project-sidebar .card {
  height: fit-content;
}

.project-meta {
  display: grid;
  gap: var(--space-3);
}

.project-meta dt {
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-medium);
  color: var(--color-text-muted);
}

.project-meta dd {
  font-size: var(--type-size-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* Prose styling for project content */
.prose {
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
}

.prose h2 {
  font-size: var(--type-size-2xl);
  font-weight: var(--type-weight-bold);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-2);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  font-size: var(--type-size-xl);
  font-weight: var(--type-weight-semibold);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.prose h3:first-child {
  margin-top: 0;
}

.prose h4 {
  font-size: var(--type-size-lg);
  font-weight: var(--type-weight-semibold);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.prose p {
  margin-bottom: var(--space-4);
}

.prose ul, .prose ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.prose strong {
  font-weight: var(--type-weight-semibold);
}

.prose blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--space-4);
  margin: var(--space-4) 0;
  color: var(--color-text-secondary);
  font-style: italic;
}

.prose img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  margin: var(--space-4) 0;
}

.prose hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-8) 0;
}

.prose pre {
  background: var(--color-bg-muted);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  overflow-x: auto;
  margin-bottom: var(--space-4);
  font-family: var(--font-family-mono);
  font-size: var(--type-size-sm);
}

.prose code {
  font-family: var(--font-family-mono);
  font-size: 0.9em;
  background: var(--color-bg-muted);
  padding: 0.1em 0.3em;
  border-radius: var(--radius-sm);
}

.prose pre code {
  background: none;
  padding: 0;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-4);
}

.prose th, .prose td {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  text-align: left;
}

.prose th {
  background: var(--color-bg-muted);
  font-weight: var(--type-weight-semibold);
}

/* Math blocks (KaTeX) */
.prose .math-block {
  display: block;
  text-align: center;
  margin: var(--space-4) 0;
  overflow-x: auto;
}

.prose .math-inline {
  display: inline;
}

/* --------------------------------------------------------------------------
   Tags & Badges
   -------------------------------------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--type-size-xs);
  font-weight: var(--type-weight-medium);
  background-color: var(--color-bg-muted);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--type-size-xs);
  font-weight: var(--type-weight-semibold);
  border-radius: var(--radius-full);
}

.badge--success {
  background-color: var(--color-success-subtle);
  color: var(--color-success);
}

.badge--accent {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   About Section / Page
   -------------------------------------------------------------------------- */
.about-content {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .about-content {
    grid-template-columns: 2fr 1fr;
  }
}

.about-text p {
  font-size: var(--type-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-4);
}

.about-text p:last-child {
  margin-bottom: 0;
}

/* Quick Facts */
.quick-facts {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.quick-fact {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--type-size-sm);
  color: var(--color-text);
}

.quick-fact__icon {
  width: 16px;
  height: 16px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

/* Skills Grid */
.skills-grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .skills-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .skills-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.skills-category h3 {
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  text-transform: none;
  letter-spacing: normal;
}

.skills-category__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.timeline-item {
  display: flex;
  gap: var(--space-4);
}

.timeline-item__marker {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  border-radius: var(--radius-full);
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-bold);
  flex-shrink: 0;
}

.timeline-item__content h3 {
  font-size: var(--type-size-base);
  font-weight: var(--type-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.timeline-item__content p {
  font-size: var(--type-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Languages */
.languages-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.language-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.language-item__name {
  font-weight: var(--type-weight-medium);
  color: var(--color-text);
}

.language-item__level {
  font-size: var(--type-size-xs);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Contact Section
   -------------------------------------------------------------------------- */
.contact-grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.contact-item__icon {
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.contact-item__text {
  font-size: var(--type-size-base);
  color: var(--color-text);
}

.contact-item__text a {
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.contact-item__text a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.social-links {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-medium);
  color: var(--color-text);
}

.form-input,
.form-textarea {
  padding: var(--space-3) var(--space-4);
  font-size: var(--type-size-base);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-subtle);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Copy Button */
.copy-btn {
  position: relative;
}

.copy-btn__tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-1) var(--space-2);
  font-size: var(--type-size-xs);
  background-color: var(--color-text);
  color: var(--color-accent-ink);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  margin-bottom: var(--space-2);
}

.copy-btn__tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--color-text);
}

.copy-btn.copied .copy-btn__tooltip {
  opacity: 1;
  visibility: visible;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer__copyright {
  font-size: var(--type-size-sm);
  color: var(--color-text-muted);
}

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

.footer__link {
  font-size: var(--type-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   404 Page
   -------------------------------------------------------------------------- */
.error-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height));
  text-align: center;
  padding: var(--space-8);
}

.error-page__code {
  font-size: var(--type-size-6xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text-muted);
  line-height: 1;
  margin-bottom: var(--space-4);
}

.error-page__title {
  font-size: var(--type-size-2xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.error-page__text {
  font-size: var(--type-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 400px;
}

/* --------------------------------------------------------------------------
   Page Headers
   -------------------------------------------------------------------------- */
.page-header {
  padding: var(--space-12) 0 var(--space-8);
  text-align: center;
}

@media (min-width: 768px) {
  .page-header {
    padding: var(--space-16) 0 var(--space-10);
  }
}

.page-header__title {
  font-size: var(--type-size-3xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

@media (min-width: 768px) {
  .page-header__title {
    font-size: var(--type-size-4xl);
  }
}

.page-header__description {
  font-size: var(--type-size-lg);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Prose / Rich Text
   -------------------------------------------------------------------------- */
.prose {
  font-size: var(--type-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

.prose h2 {
  font-size: var(--type-size-xl);
  font-weight: var(--type-weight-semibold);
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
}

.prose h3 {
  font-size: var(--type-size-lg);
  font-weight: var(--type-weight-semibold);
  color: var(--color-text);
  margin-top: var(--space-6);
  margin-bottom: var(--space-3);
}

.prose p {
  margin-bottom: var(--space-4);
}

.prose ul, .prose ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.prose ul {
  list-style-type: disc;
}

.prose ol {
  list-style-type: decimal;
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.prose strong {
  font-weight: var(--type-weight-semibold);
  color: var(--color-text);
}

.prose code {
  font-family: var(--font-family-mono);
  font-size: 0.875em;
  background-color: var(--color-bg-muted);
  padding: 0.125em 0.25em;
  border-radius: var(--radius-sm);
}

/* --------------------------------------------------------------------------
   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;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* --------------------------------------------------------------------------
   Contact Page Styles
   -------------------------------------------------------------------------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 768px) {
  .contact-layout {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
  }
}

.contact-info__title {
  font-size: var(--type-size-2xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.contact-info__text {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-8);
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.contact-method {
  display: flex;
  gap: var(--space-4);
}

.contact-method__icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  border-radius: var(--radius-lg);
}

.contact-method__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.contact-method__label {
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-medium);
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: normal;
}

.contact-method__value {
  font-size: var(--type-size-lg);
  font-weight: var(--type-weight-medium);
  color: var(--color-text);
}

a.contact-method__value {
  color: var(--color-accent);
  text-decoration: none;
}

a.contact-method__value:hover {
  text-decoration: underline;
}

.contact-method .btn {
  margin-top: var(--space-2);
  align-self: flex-start;
}

.contact-social__title {
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-semibold);
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: normal;
  margin-bottom: var(--space-4);
}

.contact-social__links {
  display: flex;
  gap: var(--space-4);
}

.contact-social__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-muted);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: var(--type-weight-medium);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.contact-social__link:hover {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
}

.contact-form-section .card {
  padding: var(--space-8);
}

.contact-form-note {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background-color: var(--color-bg-subtle);
  border-radius: var(--radius-lg);
  margin: var(--space-6) 0;
}

.contact-form-note__icon {
  flex-shrink: 0;
  color: var(--color-accent);
}

.contact-form-note__title {
  font-size: var(--type-size-sm);
  font-weight: var(--type-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.contact-form-note__text {
  font-size: var(--type-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.contact-form-note__text a {
  color: var(--color-accent);
}

.contact-cta {
  text-align: center;
}

.response-times {
  list-style: none;
  padding: 0;
  margin: 0;
}

.response-time {
  display: flex;
  justify-content: space-between;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.response-time:last-child {
  border-bottom: none;
}

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

.response-time__value {
  font-weight: var(--type-weight-medium);
  color: var(--color-text);
}

.copy-email--success {
  background-color: var(--color-success-subtle);
  border-color: var(--color-success);
  color: var(--color-success);
}

/* --------------------------------------------------------------------------
   404 Error Page Styles
   -------------------------------------------------------------------------- */
.error-page {
  min-height: calc(100vh - var(--header-height) - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) 0;
}

.error-page__container {
  text-align: center;
  max-width: 540px;
}

.error-page__code {
  font-size: clamp(6rem, 20vw, 12rem);
  font-weight: var(--type-weight-bold);
  color: var(--color-accent);
  line-height: 1;
  opacity: 0.15;
  margin-bottom: calc(var(--space-8) * -1);
}

.error-page__title {
  font-size: var(--type-size-4xl);
  font-weight: var(--type-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.error-page__message {
  font-size: var(--type-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-8);
}

.error-page__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

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

.error-page__suggestions-title {
  font-size: var(--type-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.error-page__suggestions-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  gap: var(--space-6);
}

.error-page__suggestions-list a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: var(--type-weight-medium);
}

.error-page__suggestions-list a:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Projects Grid Enhancement
   -------------------------------------------------------------------------- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-6);
}

@media (max-width: 400px) {
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
  .header,
  .footer,
  .theme-toggle,
  .menu-toggle,
  .mobile-nav {
    display: none !important;
  }
  
  main {
    padding-top: 0;
  }
  
  .card {
    border: 1px solid var(--color-border);
    break-inside: avoid;
  }
}

/* Academic profile: a quiet, shared system for every page. */
:root {
  --font-display: Georgia, 'Times New Roman', serif;
  --font-body: var(--font-family-sans);
  --container-max: 1040px;
  --color-bg: #fdfcf9;
  --color-bg-subtle: #f5f4f0;
  --color-bg-muted: #eeede7;
  --color-text: #252a2d;
  --color-text-secondary: #535b60;
  --color-text-muted: #636c71;
  --color-border: #d9dcd9;
  --color-border-subtle: #e6e7e2;
  --color-accent: #315d78;
  --color-accent-hover: #21465e;
  --color-accent-subtle: #eaf0f2;
  --color-accent-ink: #fdfcf9;
  --color-focus: var(--color-accent);
  --color-paper: var(--color-bg);
  --color-ink: var(--color-text);
  --color-muted: var(--color-text-muted);
  --color-success: var(--color-text-secondary);
  --color-success-subtle: var(--color-bg-subtle);
  --radius-sm: 3px; --radius-md: 3px; --radius-lg: 0; --radius-xl: 0;
  --shadow-sm: none; --shadow-md: none; --shadow-lg: none; --shadow-xl: none;
}
[data-theme="dark"] {
  --color-bg: #1c2124; --color-bg-subtle: #242a2e; --color-bg-muted: #30383d;
  --color-text: #eeeefa; --color-text-secondary: #c0c7ca; --color-text-muted: #adb8bd;
  --color-border: #424c51; --color-border-subtle: #343e43;
  --color-accent: #a0c5dc; --color-accent-hover: #c6deec; --color-accent-subtle: #2c3b45;
  --color-accent-ink: #1c2124; --color-text-inverse: #1c2124;
}
html, body { overflow-x: clip; }
body { line-height: 1.7; }
h1, h2, h3 { min-width: 0; overflow-wrap: break-word; text-wrap: balance; }
h1, h2 { font-family: var(--font-display); font-weight: 400 !important; letter-spacing: -0.025em; }
h3 { font-family: var(--font-display); letter-spacing: normal; }
.header { position: relative; height: 84px; border: 0; }
.header__inner { border-bottom: 1px solid var(--color-border); gap: 28px; }
.header__logo { font-family: var(--font-display); font-size: 23px; font-weight: 400; margin-right: auto; }
.nav { gap: 28px; }
.nav__link { font-size: 15px; padding-block: var(--space-3); }
.nav__link.active::after { height: 1px; bottom: 6px; }
.hero { padding: 76px 0 60px; text-align: left; }
.hero__content { max-width: var(--container-max); display: grid; grid-template-columns: minmax(0, 1fr) 180px; column-gap: var(--space-16); }
.hero__avatar { grid-column: 2; grid-row: 1 / 4; width: 180px; height: 210px; margin: 0; border: 0; border-radius: 3px; }
.hero__title { grid-column: 1; font-size: clamp(36px, 4.3vw, 52px); line-height: 1.12; max-width: 17ch; margin: 0 0 var(--space-5); }
.hero__subtitle { grid-column: 1; font-size: 18px; max-width: 55ch; margin-bottom: var(--space-6); }
.hero__actions { grid-column: 1; justify-content: flex-start; gap: var(--space-2) var(--space-6); }
.btn, .btn--lg { min-height: 44px; padding: var(--space-2) var(--space-4); font-size: 15px; font-weight: 500; border-radius: 3px; box-shadow: none; }
.btn--primary { background: var(--color-accent); color: var(--color-accent-ink); }
.btn--primary:hover:not(:disabled) { background: var(--color-accent-hover); color: var(--color-accent-ink); }
.btn--secondary, .btn--ghost { background: transparent; color: var(--color-accent); }
.hero__actions .btn, .project-card__actions .btn { padding: var(--space-1) 0; background: transparent; border: 0; color: var(--color-accent); border-radius: 0; text-decoration: underline; text-underline-offset: 5px; }
.hero__actions .btn:hover, .project-card__actions .btn:hover { background: transparent; color: var(--color-accent-hover); text-decoration-thickness: 2px; }
.hero__actions .btn__icon, .project-card__actions .btn__icon { display: none; }
a:active, button:active { opacity: .75; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 4px; transition: none; }
.section { padding: 44px 0; }
.section--muted { background: transparent; }
.section + .section > .container, .hero + .section > .container { border-top: 1px solid var(--color-border); padding-top: var(--space-10); }
.section__header { text-align: left; margin-bottom: 28px; }
.section__title { font-size: 30px; line-height: 1.25; margin-bottom: var(--space-5); }
.section__description { margin-left: 0; max-width: 65ch; font-size: 16px; }
.card { padding: 0; border: 0; background: transparent; border-radius: 0; box-shadow: none; }
.card--interactive:hover { box-shadow: none; }
.about-text { max-width: 72ch; }
.about-text p { font-size: 16px; line-height: 1.8; }
.projects-grid { grid-template-columns: minmax(0, 1fr); gap: 0; }
.project-card { padding: var(--space-6) 0; border-top: 1px solid var(--color-border); }
.project-card__title { font-family: var(--font-display); font-size: 20px; font-weight: 500; }
.project-card__description { font-size: 16px; max-width: 72ch; margin-bottom: var(--space-4); }
.project-card__actions { gap: var(--space-6); }
.tag, .badge { font-family: var(--font-body); font-size: 13px; font-weight: 400; border-radius: 3px; background: var(--color-bg-subtle); color: var(--color-text-secondary); }
.badge { background: transparent; padding-inline: 0; white-space: nowrap; }
.tag { padding: var(--space-1) var(--space-2); }
.page-header { padding: 60px 0 var(--space-8); text-align: left; }
.page-header__title, .project-header__title { font-size: clamp(34px, 4vw, 46px); max-width: 28ch; }
.page-header__description { margin-left: 0; max-width: 70ch; font-size: 17px; }
.project-layout { grid-template-columns: minmax(0, 1fr) 230px; gap: var(--space-12); }
.project-sidebar { border-left: 1px solid var(--color-border); padding-left: 28px; }
.project-content { min-width: 0; }
.prose { font-size: 16px; line-height: 1.8; }
.prose h2 { font-size: 28px; }
.prose h3 { font-size: 20px; }
.prose table { display: block; overflow-x: auto; max-width: 100%; }
.filter-tab { border-radius: 3px; min-height: 44px; }
.footer { margin-top: var(--space-10); padding: 28px 0; background: transparent; }
.footer__copyright, .footer__link { font-size: 13px; }
.timeline-item__marker { width: 48px; height: auto; align-items: flex-start; justify-content: flex-start; background: transparent; color: var(--color-text-secondary); border: 0; border-radius: 0; font-weight: 500; padding-top: var(--space-1); }
.error-page__code { color: var(--color-text); }
@media (max-width: 767px) {
  .header { height: 72px; }
  .hero { padding: var(--space-10) 0 var(--space-6); }
  .hero__content { grid-template-columns: minmax(0, 1fr) 100px; gap: var(--space-5); }
  .hero__avatar { width: 100px; height: 120px; grid-row: 1; }
  .hero__title { font-size: 34px; margin-bottom: 0; }
  .hero__subtitle, .hero__actions { grid-column: 1 / -1; }
  .hero__subtitle { margin-bottom: 0; font-size: 17px; }
  .section { padding: 28px 0; }
  .project-layout { grid-template-columns: minmax(0, 1fr); }
  .project-sidebar { border-left: 0; border-top: 1px solid var(--color-border); padding: var(--space-6) 0 0; }
  .project-card__header { flex-wrap: wrap; gap: var(--space-2) var(--space-4); }
  .filter-tabs { gap: var(--space-1); }
  .filter-tab { padding-inline: var(--space-3); }
  .page-header { padding-top: var(--space-10); }
}
@media print { .header { display: none; } .hero { padding-top: 0; } }

.mobile-nav { display: none; transform: none; position: absolute; top: 72px; bottom: auto; border-bottom: 1px solid var(--color-border); }
@media (max-width: 767px) {
 .mobile-nav--open { display: block; }
 html:not(.js) .nav { display: flex; flex-wrap: wrap; gap: var(--space-3); }
 html:not(.js) .header { height: auto; min-height: 72px; }
 html:not(.js) .header__inner { flex-wrap: wrap; padding-block: var(--space-3); }
 html:not(.js) .header__actions { display: none; }
}