/* CSS Design System for John Kim's Portfolio Showcase */

:root {
  /* Yellow-green palette tokens */
  --color-primary: hsl(78, 76%, 42%);
  --color-primary-hover: hsl(78, 85%, 34%);
  --color-primary-light: hsl(78, 60%, 95%);
  --color-primary-light-hover: hsl(78, 60%, 90%);
  
  --color-bg-page: hsl(78, 20%, 98%);
  --color-card-bg: #ffffff;
  
  /* Text and borders */
  --color-text: hsl(78, 40%, 12%);
  --color-text-muted: hsl(78, 12%, 46%);
  --color-border: hsl(78, 20%, 88%);
  --color-border-hover: hsl(78, 40%, 75%);
  
  /* Shadows & Layouts */
  --shadow-sm: 0 1px 2px rgba(120, 160, 90, 0.05);
  --shadow-md: 0 4px 12px rgba(120, 160, 90, 0.08);
  --radius-box: 16px;
  --radius-badge: 9999px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  
  /* Scrollbars properties */
  --scrollbar-thumb: hsl(78, 25%, 80%);
  --scrollbar-track: transparent;
}

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

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

body {
  font-family: 'Rubik', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--color-bg-page);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
}

/* Custom Scrollbars */
.sidebar, .projects-grid-container, .table-container {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

@supports not (scrollbar-color: auto) {
  .sidebar::-webkit-scrollbar, 
  .projects-grid-container::-webkit-scrollbar,
  .table-container::-webkit-scrollbar {
    width: 6px;
    height: 6px;
  }
  .sidebar::-webkit-scrollbar-thumb, 
  .projects-grid-container::-webkit-scrollbar-thumb,
  .table-container::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: var(--radius-badge);
  }
  .sidebar::-webkit-scrollbar-track, 
  .projects-grid-container::-webkit-scrollbar-track,
  .table-container::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
  }
}

/* Screen Layout */
.layout-container {
  min-height: 100vh;
  display: flex;
  justify-content: center;
  width: 100%;
}

.max-width-wrapper {
  width: 100%;
  max-width: 1600px;
  display: flex;
  flex-direction: column;
}

/* Sidebar Styles */
.sidebar {
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
  border-bottom: 1px solid var(--color-border);
}

.profile-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.avatar-container {
  position: relative;
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.05);
  flex-shrink: 0;
  cursor: pointer;
  user-select: none;
  transition: transform var(--transition-fast);
}

.avatar-container:active {
  transform: scale(0.95);
}

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

.profile-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.profile-name {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.location-container {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--color-text-muted);
}

.location-icon {
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
}

.location-text {
  font-size: 0.9rem;
  font-weight: 500;
}

/* Bio Text */
.profile-bio {
  font-size: 1.05rem;
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.profile-bio strong {
  font-weight: 600;
  border-bottom: 2px solid var(--color-primary);
}

.bio-subtitle {
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

/* Newsletter Subscription Form */
.subscribe-form {
  display: flex;
  width: 100%;
  max-width: 420px;
}

.email-input {
  flex-grow: 1;
  padding: 0.48rem 0.64rem;
  border: 1px solid var(--color-border);
  border-right: none;
  border-radius: 8px 0 0 8px;
  font-family: inherit;
  font-size: 0.68rem;
  background-color: var(--color-card-bg);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-fast);
}

.email-input:focus {
  border-color: var(--color-primary);
}

.submit-button {
  background-color: var(--color-primary);
  color: white;
  border: 1px solid var(--color-primary);
  border-radius: 0 8px 8px 0;
  padding: 0.48rem 0.88rem;
  font-family: inherit;
  font-size: 0.68rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.submit-button:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* Visually Hidden Utility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Form feedback messages */
.form-message {
  font-size: 0.9rem;
  margin-top: -0.5rem;
  min-height: 1.25rem;
}
.form-message.success {
  color: var(--color-primary-hover);
  font-weight: 600;
}
.form-message.error {
  color: #c2410c;
}

/* Social links icons */
.social-links-wrapper {
  margin-top: auto;
}

.social-links {
  list-style: none;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.social-icon-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background-color: var(--color-card-bg);
  color: var(--color-text);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-icon-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.social-svg-icon {
  width: 1.25rem;
  height: 1.25rem;
}

/* Right Grid Area */
.projects-grid-container {
  width: 100%;
  padding: 1.5rem;
}

.projects-grid {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  width: 100%;
}

/* Individual Card Design */
.project-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-box);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  width: 100%;
  max-width: 480px;
}

.project-card:hover {
  transform: translateY(-3px) scale(1.01);
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
}

.card-link {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  text-decoration: none;
  color: inherit;
  gap: 1.25rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.app-identity {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-box {
  width: 2.25rem;
  height: 2.25rem;
  background-color: var(--color-primary-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  transition: transform var(--transition-normal);
}

.project-card:hover .logo-box {
  transform: rotate(-8deg);
}

.app-logo {
  width: 1.25rem;
  height: 1.25rem;
}

.app-name {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--color-text);
}

.url-badge {
  font-size: 0.95rem;
  font-weight: 600;
  background-color: var(--color-bg-page);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-badge);
  transition: all var(--transition-fast);
}

.project-card:hover .url-badge {
  background-color: var(--color-primary-light);
  color: var(--color-primary-hover);
  border-color: var(--color-primary);
}

/* Graphical Representation Area */
.flow-representation {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  border: none;
  padding: 0.75rem 0;
  position: relative;
  width: 100%;
}

.flow-node {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background-color: var(--color-bg-page);
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  z-index: 2;
  transition: all var(--transition-fast);
  flex-shrink: 1;
  width: 108px;
  max-width: 135px;
}

.node-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: normal;
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* Connectors and Arrows */
.flow-connector {
  flex-grow: 1;
  display: flex;
  align-items: center;
  margin: 0 0.5rem;
  position: relative;
  z-index: 1;
  flex-shrink: 1;
  min-width: 35px;
  width: 60px;
  max-width: 80px;
}

.arrow-body {
  height: 2px;
  background-color: hsl(78, 15%, 35%);
  flex-grow: 1;
  position: relative;
  overflow: hidden;
}

.arrow-body::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 20px;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  transform: translateX(-100%);
}

@keyframes flowPulse {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(200%);
  }
}

.project-card:hover .arrow-body::after {
  animation: flowPulse 1.5s infinite linear;
}

.arrow-head {
  width: 1.25rem;
  height: 1.25rem;
  color: hsl(78, 15%, 35%);
  margin-left: -5px;
  transition: color var(--transition-fast), transform var(--transition-normal);
}

.project-card:hover .arrow-head {
  color: var(--color-primary);
  transform: translateX(4px);
}

.app-description {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.45;
}



/* Media Queries for Responsive Layout (matches marclou.com split layout) */
@media (min-width: 768px) {
  .max-width-wrapper {
    flex-direction: row;
    height: 100vh;
    overflow: hidden;
  }
  
  .sidebar {
    width: 380px;
    height: 100%;
    overflow-y: auto;
    border-bottom: none;
    border-right: 1px solid var(--color-border);
    padding: 3.5rem 2.5rem 3.5rem 3.5rem;
    position: sticky;
    top: 0;
    gap: 2.25rem;
    flex-shrink: 0;
  }
  
  .avatar-container {
    width: 9rem;
    height: 9rem;
  }
  
  .profile-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }
  
  .profile-name {
    font-size: 2.25rem;
  }
  
  .projects-grid-container {
    flex-grow: 1;
    height: 100%;
    overflow-y: auto;
    padding: 3rem 2rem;
  }
  
  .projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    align-content: start;
    height: auto;
  }

  .projects-grid:has(> :only-child) {
    grid-template-columns: 1fr;
  }

  .card-link {
    padding: 1.5rem;
  }

  .flow-node {
    width: 132px;
    max-width: 162px;
    padding: 0.6rem 0.9rem;
  }

  .node-label {
    font-size: 0.85rem;
  }

  .flow-connector {
    margin: 0 1rem;
    min-width: 50px;
    width: 70px;
    max-width: 80px;
  }
}

@media (min-width: 1280px) {
  .sidebar {
    width: 440px;
    padding-right: 3.5rem;
  }
}