/* 
 * Neo-Brutalism Theme v2.0 - Yiyang Sun Portfolio
 * Based on 2024 Brutalist Web Design Trends
 * Color Palette: Burgundy to Sunset Red System
 */

:root {
  /* Core Color Palette */
  --burgundy: #721121;
  --chestnut: #a5402d;
  --indian-red: #f15156;
  --fawn: #ffc07f;
  --sunset: #ffcf99;

  /* Brutalist System Colors */
  --bg-primary: #ffffff;
  --bg-dark: var(--burgundy);
  --text-primary: #000000;
  --text-inverse: #ffffff;
  --shadow-color: #000000;

  /* Typography */
  --font-system: Arial, Helvetica, "Nimbus Sans L", "Liberation Sans",
    sans-serif;
  --font-mono: "Courier New", monospace;
  --font-size-huge: 2.25rem;
  --font-size-large: 1.75rem;
  --font-size-medium: 1.1rem;
  --font-size-normal: 0.95rem;

  /* Spacing & Shadows */
  --border-thick: 4px;
  --border-medium: 3px;
  --border-thin: 2px;
  --shadow-offset: 6px;
  --shadow-offset-sm: 4px;
}

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

body {
  font-family: var(--font-system) !important;
  font-size: var(--font-size-normal);
  line-height: 1.4;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

/* Neo-Brutalist Typography */
h1,
.title-huge {
  font-family: var(--font-system);
  font-size: var(--font-size-huge);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h2,
.title-large {
  font-family: var(--font-system);
  font-size: var(--font-size-large);
  font-weight: 700;
  color: var(--indian-red);
}

h3,
.title-medium {
  font-family: var(--font-system);
  font-size: var(--font-size-medium);
  font-weight: 700;
}

/* Brutalist Components */
.brutalist-button {
  display: inline-block;
  padding: 10px 18px;
  background: var(--indian-red);
  color: var(--text-inverse);
  border: var(--border-thick) solid var(--text-primary);
  font-family: var(--font-system);
  font-weight: 700;
  font-size: var(--font-size-normal);
  text-decoration: none;
  cursor: pointer;
  transition: none;
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--shadow-color);
}

.brutalist-button:hover {
  background: var(--chestnut);
  transform: translate(2px, 2px);
  box-shadow: calc(var(--shadow-offset) - 2px) calc(var(--shadow-offset) - 2px)
    0 var(--shadow-color);
}

.brutalist-button:active {
  transform: translate(var(--shadow-offset), var(--shadow-offset));
  box-shadow: none;
}

.brutalist-card {
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--text-primary);
  padding: 18px;
  margin: 12px 0;
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--shadow-color);
}

.brutalist-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: calc(var(--shadow-offset) + 2px) calc(var(--shadow-offset) + 2px)
    0 var(--shadow-color);
}

/* Navigation - Brutalist Style */
.brutalist-nav {
  background: var(--bg-primary);
  border-bottom: var(--border-thick) solid var(--text-primary);
  padding: 0px 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  box-shadow: 0 var(--shadow-offset) 0 var(--shadow-color);
}

.brutalist-nav-item {
  display: inline-block;
  padding: 8px 16px;
  background: var(--bg-primary);
  border: var(--border-medium) solid var(--text-primary);
  margin: 0 4px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  transition: none;
  box-shadow: 3px 3px 0 var(--shadow-color);
}

.brutalist-nav-item:hover {
  background: var(--fawn);
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 var(--shadow-color);
}

.brutalist-nav-item.active {
  background: var(--indian-red);
  color: var(--text-inverse);
  transform: translate(3px, 3px);
  box-shadow: none;
}

/* Hero Section - Brutalist */
.brutalist-hero {
  background: var(--sunset);
  border: var(--border-thick) solid var(--text-primary);
  padding: 16px 20px;
  margin: 16px 0;
  text-align: center;
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--shadow-color);
  position: relative;
}

.brutalist-hero::before {
  content: "";
  position: absolute;
  top: -8px;
  left: -8px;
  right: -8px;
  bottom: -8px;
  border: var(--border-medium) solid var(--indian-red);
  z-index: -1;
}

/* Stats Grid - Brutalist */
.brutalist-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
  margin: 24px 0;
}

.brutalist-stat {
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--text-primary);
  padding: 18px;
  text-align: center;
  box-shadow: var(--shadow-offset-sm) var(--shadow-offset-sm) 0
    var(--shadow-color);
}

.brutalist-stat-number {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 900;
  color: var(--indian-red);
  display: block;
}

.brutalist-stat-label {
  font-family: var(--font-system);
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.9rem;
  margin-top: 8px;
}

/* Skill Grid - Brutalist */
.brutalist-skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
  margin: 24px 0;
}

.brutalist-skill {
  background: var(--fawn);
  border: var(--border-medium) solid var(--text-primary);
  padding: 12px;
  text-align: center;
  box-shadow: 4px 4px 0 var(--shadow-color);
}

.brutalist-skill:hover {
  background: var(--indian-red);
  color: var(--text-inverse);
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--shadow-color);
}

/* Contact Cards - Brutalist */
.brutalist-contact {
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--text-primary);
  padding: 16px;
  margin: 12px 0;
  box-shadow: var(--shadow-offset-sm) var(--shadow-offset-sm) 0
    var(--shadow-color);
}

.brutalist-contact:hover {
  background: var(--sunset);
  transform: translate(-2px, -2px);
  box-shadow: calc(var(--shadow-offset-sm) + 2px)
    calc(var(--shadow-offset-sm) + 2px) 0 var(--shadow-color);
}

/* Forms - Brutalist */
input,
textarea,
select {
  font-family: var(--font-system);
  font-size: var(--font-size-normal);
  padding: 6px 10px;
  border: var(--border-medium) solid var(--text-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  box-shadow: 2px 2px 0 var(--shadow-color);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  background: var(--sunset);
  box-shadow: 4px 4px 0 var(--shadow-color);
}

/* Utility Classes */
.brutalist-bg-primary {
  background: var(--bg-primary);
}
.brutalist-bg-dark {
  background: var(--bg-dark);
  color: var(--text-inverse);
}
.brutalist-bg-red {
  background: var(--indian-red);
  color: var(--text-inverse);
}
.brutalist-bg-fawn {
  background: var(--fawn);
}
.brutalist-bg-sunset {
  background: var(--sunset);
}

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

.brutalist-border {
  border: var(--border-thick) solid var(--text-primary);
}
.brutalist-border-thin {
  border: var(--border-thin) solid var(--text-primary);
}

.brutalist-shadow {
  box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--shadow-color);
}
.brutalist-shadow-sm {
  box-shadow: var(--shadow-offset-sm) var(--shadow-offset-sm) 0
    var(--shadow-color);
}

.brutalist-mono {
  font-family: var(--font-mono);
}

/* Enhanced Multi-Tier Responsive System */

/* Extra Small Devices (小手机) - 320px to 479px */
@media (max-width: 479px) {
  :root {
    --font-size-huge: 1.5rem;
    --font-size-large: 1.2rem;
    --font-size-medium: 1rem;
    --font-size-normal: 0.9rem;
    --shadow-offset: 3px;
    --shadow-offset-sm: 2px;
    --border-thick: 3px;
    --border-medium: 2px;
  }

  body {
    font-size: 0.85rem;
    line-height: 1.4;
  }

  /* Typography响应式优化 */
  h1, .title-huge {
    font-size: 1.4rem;
    line-height: 1.2;
  }

  h2, .title-large {
    font-size: 1.1rem;
    line-height: 1.3;
  }

  h3, .title-medium {
    font-size: 0.95rem;
    line-height: 1.3;
  }

  p {
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 12px;
  }

  .brutalist-stat-number {
    font-size: 1.4rem;
  }

  .brutalist-stat-label {
    font-size: 0.8rem;
  }

  .brutalist-card {
    padding: 12px;
    margin: 8px 0;
  }

  .brutalist-button {
    padding: 8px 14px;
    font-size: 0.85rem;
  }

  .brutalist-stats {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .brutalist-skills {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .brutalist-skill {
    padding: 8px;
  }

  .brutalist-contact {
    padding: 12px;
  }

  .brutalist-hero {
    padding: 12px 16px;
    margin: 12px 0;
  }

  /* 卡片系统完整性保证 */
  .preview-card,
  .project-card,
  .work-card {
    padding: 14px;
    margin: 12px 0;
    min-height: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  /* 确保按钮和链接不会被截断 */
  .brutalist-button,
  .nav-item {
    white-space: nowrap;
    text-overflow: ellipsis;
    min-height: 44px; /* 触摸友好 */
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* 图片和头像响应式 */
  .brutalist-avatar {
    width: 180px;
    height: 180px;
    margin: 0 auto;
  }

  /* 技能卡片优化 */
  .skill-item {
    padding: 6px 8px;
    font-size: 0.75rem;
    min-height: 32px;
  }

  /* 统计卡片优化 */
  .stat-box {
    padding: 10px;
    min-height: 80px;
  }
}

/* Small Devices (大手机) - 480px to 767px */
@media (min-width: 480px) and (max-width: 767px) {
  :root {
    --font-size-huge: 1.7rem;
    --font-size-large: 1.3rem;
    --font-size-medium: 1.05rem;
    --font-size-normal: 0.92rem;
    --shadow-offset: 4px;
    --shadow-offset-sm: 3px;
  }

  /* Typography响应式优化 */
  h1, .title-huge {
    font-size: 1.6rem;
    line-height: 1.2;
  }

  h2, .title-large {
    font-size: 1.25rem;
    line-height: 1.3;
  }

  h3, .title-medium {
    font-size: 1.02rem;
    line-height: 1.3;
  }

  p {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 14px;
  }

  .brutalist-stat-number {
    font-size: 1.6rem;
  }

  .brutalist-stat-label {
    font-size: 0.85rem;
  }

  .brutalist-card {
    padding: 14px;
    margin: 10px 0;
  }

  .brutalist-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .brutalist-skills {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .brutalist-contact {
    padding: 14px;
  }

  .brutalist-hero {
    padding: 14px 18px;
    margin: 14px 0;
  }

  /* 卡片系统完整性保证 */
  .preview-card,
  .project-card,
  .work-card {
    padding: 16px;
    margin: 14px 0;
    min-height: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  /* 图片和头像响应式 */
  .brutalist-avatar {
    width: 220px;
    height: 220px;
    margin: 0 auto;
  }

  /* 技能卡片优化 */
  .skill-item {
    padding: 8px 10px;
    font-size: 0.8rem;
    min-height: 36px;
  }

  /* 统计卡片优化 */
  .stat-box {
    padding: 12px;
    min-height: 90px;
  }
}

/* Medium Devices (平板) - 768px to 1023px */
@media (min-width: 768px) and (max-width: 1023px) {
  :root {
    --font-size-huge: 2rem;
    --font-size-large: 1.5rem;
    --font-size-medium: 1.08rem;
    --font-size-normal: 0.94rem;
    --shadow-offset: 5px;
    --shadow-offset-sm: 4px;
  }

  /* Typography响应式优化 */
  h1, .title-huge {
    font-size: 1.9rem;
    line-height: 1.2;
  }

  h2, .title-large {
    font-size: 1.45rem;
    line-height: 1.3;
  }

  h3, .title-medium {
    font-size: 1.06rem;
    line-height: 1.3;
  }

  p {
    font-size: 0.94rem;
    line-height: 1.5;
    margin-bottom: 16px;
  }

  .brutalist-stat-number {
    font-size: 1.8rem;
  }

  .brutalist-stat-label {
    font-size: 0.88rem;
  }

  .brutalist-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .brutalist-skills {
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
  }

  .brutalist-card {
    padding: 16px;
  }

  /* 卡片系统完整性保证 */
  .preview-card,
  .project-card,
  .work-card {
    padding: 18px;
    margin: 16px 0;
    min-height: auto;
    word-wrap: break-word;
    overflow-wrap: break-word;
  }

  /* 图片和头像响应式 */
  .brutalist-avatar {
    width: 240px;
    height: 240px;
    margin: 0 auto;
  }

  /* 技能卡片优化 */
  .skill-item {
    padding: 10px 12px;
    font-size: 0.85rem;
    min-height: 40px;
  }

  /* 统计卡片优化 */
  .stat-box {
    padding: 14px;
    min-height: 100px;
  }
}

/* Large Devices (桌面) - 1024px to 1199px */
@media (min-width: 1024px) and (max-width: 1199px) {
  :root {
    --font-size-huge: 2.1rem;
    --font-size-large: 1.6rem;
    --font-size-medium: 1.1rem;
    --font-size-normal: 0.95rem;
    --shadow-offset: 6px;
    --shadow-offset-sm: 4px;
  }

  .brutalist-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .brutalist-skills {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* Extra Large Devices (大屏) - 1200px+ */
@media (min-width: 1200px) {
  .brutalist-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .brutalist-skills {
    grid-template-columns: repeat(6, 1fr);
    gap: 14px;
  }

  .brutalist-card {
    padding: 20px;
  }
}

/* Mobile Navigation Styles */
@media (max-width: 767px) {
  .brutalist-nav {
    padding: 8px 0;
  }

  .brutalist-nav .main-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
  }

  .nav-links {
    display: none; /* Will be replaced with hamburger menu */
  }

  /* Hamburger Menu Button */
  .hamburger-menu {
    display: flex;
    flex-direction: column;
    width: 30px;
    height: 24px;
    cursor: pointer;
    background: transparent;
    border: none;
    padding: 0;
    justify-content: space-between;
  }

  .hamburger-line {
    width: 100%;
    height: 4px;
    background: var(--text-primary);
    border: none;
    transition: none;
  }

  /* Sidebar Navigation */
  .mobile-sidebar {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background: var(--bg-primary);
    border-right: var(--border-thick) solid var(--text-primary);
    box-shadow: var(--shadow-offset) 0 0 var(--shadow-color);
    transition: left 0.3s ease-out;
    z-index: 2000;
    padding-top: 80px;
  }

  .mobile-sidebar.open {
    left: 0;
  }

  .mobile-sidebar .nav-item {
    display: block;
    padding: 16px 24px;
    background: var(--bg-primary);
    border-bottom: var(--border-medium) solid var(--text-primary);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.1rem;
    transition: none;
    margin: 0;
    min-height: 44px; /* Touch target size */
  }

  .mobile-sidebar .nav-item:hover {
    background: var(--fawn);
  }

  .mobile-sidebar .nav-item.active {
    background: var(--indian-red);
    color: var(--text-inverse);
  }

  /* Overlay for sidebar */
  .mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1500;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease-out;
  }

  .mobile-overlay.open {
    opacity: 1;
    visibility: visible;
  }
}

/* Desktop Navigation */
@media (min-width: 768px) {
  .hamburger-menu,
  .mobile-sidebar,
  .mobile-overlay {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    left: -100% !important;
    position: absolute !important;
    pointer-events: none !important;
    z-index: -999 !important;
  }

  .nav-links {
    display: flex !important;
  }

  .brutalist-nav-item {
    display: inline-block;
    margin: 0 4px;
    padding: 10px 16px;
    background: var(--fawn);
    border: var(--border-thick) solid var(--text-primary);
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0 var(--shadow-color);
    transition: none;
    cursor: pointer;
    min-height: auto;
  }
  
  .brutalist-nav-item:hover {
    background: var(--indian-red);
    color: var(--text-inverse);
    transform: translate(-2px, -2px);
    box-shadow: calc(var(--shadow-offset) + 2px) calc(var(--shadow-offset) + 2px) 0
      var(--shadow-color);
  }
  
  .brutalist-nav-item.active {
    background: var(--indian-red);
    color: var(--text-inverse);
  }
}

/* Ensure hamburger menu is visible on mobile and tablet */
@media (max-width: 767px) {
  .hamburger-menu {
    display: flex !important;
  }
  
  .nav-links {
    display: none !important;
  }
  
  /* CSS-only hamburger menu fallback - DISABLED */
  /* Note: CSS-only fallback cannot work with current HTML structure */
  /* because checkbox and sidebar are not sibling elements */
  .nav-toggle-checkbox {
    display: none !important;
  }
}

/* Scrollbar - Brutalist */
::-webkit-scrollbar {
  width: 16px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
  border: var(--border-thin) solid var(--text-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--indian-red);
  border: var(--border-thin) solid var(--text-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--chestnut);
}

/* Animation Overrides - Minimalist Brutalist Approach */
* {
  transition: none !important;
  animation: none !important;
}

/* Only allow basic hover transforms */
.brutalist-button,
.brutalist-card,
.brutalist-contact,
.brutalist-skill {
  transition: transform 0.1s ease-out, box-shadow 0.1s ease-out !important;
}