@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ==========================================================================
   YOGA — MONOCHROME BLACK & WHITE MINIMALIST PORTFOLIO
   ========================================================================== */

:root {
  --color-bg: #FFFFFF;
  --color-surface: #F9F9F9;
  --color-text: #111111;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-border: #E5E5E5;
  --color-border-subtle: #EEEEEE;
  --color-accent: #111111;
  --color-accent-subtle: #F0F0F0;

  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Menlo, Consolas, monospace;

  --container-width: 820px;

  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;

  --radius: 4px;
  --transition: 120ms ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--color-bg);
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: #000000;
}

button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--color-text);
  z-index: 1000;
  width: 0%;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.015em;
  line-height: 1.3;
}

.text-meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.text-lead {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* Container */
.site-container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2rem);
}

main.main-content {
  flex: 1;
  padding-top: calc(64px + var(--space-xl));
  padding-bottom: var(--space-2xl);
}

/* Navbar */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  z-index: 500;
}

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

.nav-logo {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

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

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  padding: 4px 0;
  transition: color var(--transition);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-text);
  font-weight: 600;
}

.nav-link.active {
  border-bottom: 2px solid var(--color-text);
}

.nav-toggle {
  display: none;
  padding: 6px;
  color: var(--color-text);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
  align-items: center;
}

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.25);
  z-index: 400;
}

.mobile-overlay.active {
  display: block;
}

@media (max-width: 640px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #FFFFFF;
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-md) clamp(1.25rem, 5vw, 2rem);
    gap: var(--space-sm);
    display: none;
    z-index: 700;
  }
  .nav-links.open { display: flex; }
  .nav-link { width: 100%; padding: 8px 0; font-size: 1rem; border-bottom: none !important; }
}

/* Section Header */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-lg);
  margin-top: var(--space-2xl);
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
}

/* Buttons & Links */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.btn-primary {
  background: #111111;
  color: #FFFFFF;
  border: 1px solid #111111;
}

.btn-primary:hover {
  background: #333333;
  border-color: #333333;
  color: #FFFFFF;
}

.btn-secondary {
  background: #FFFFFF;
  color: #111111;
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: #111111;
}

.link-inline {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #111111;
  font-weight: 500;
  font-size: 0.875rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.link-inline:hover {
  color: #555555;
}

/* Status Pill */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #333333;
  background: #F0F0F0;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: var(--space-sm);
  border: 1px solid var(--color-border);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #111111;
}

/* Tech Tags */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 6px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 3px;
  background: #F5F5F5;
  color: #444444;
  border: 1px solid var(--color-border);
}

/* Hero */
.hero-simple {
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.hero-name {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
  letter-spacing: -0.025em;
}

.hero-role {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.hero-bio {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
  max-width: 65ch;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Project List (NO IMAGES, SUPER SIMPLE MONOCHROME) */
.project-list {
  display: flex;
  flex-direction: column;
}

.project-item {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.project-item:first-child {
  padding-top: 0;
}

.project-header-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.project-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-text);
}

.project-title a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.project-title a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.project-desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.projects-more-box {
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.projects-more-box p {
  margin: 0;
}

/* Project Filter & Search Bar */
.filter-bar {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

@media (min-width: 580px) {
  .filter-bar {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.filter-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.filter-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: var(--radius);
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.filter-pill:hover {
  border-color: #111111;
  color: #111111;
}

.filter-pill.active {
  background: #111111;
  border-color: #111111;
  color: #FFFFFF;
}

.search-box {
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--color-text);
  background: #FFFFFF;
  width: 100%;
  max-width: 240px;
}

.search-box:focus {
  outline: none;
  border-color: #111111;
}

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

.timeline-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
}

@media (min-width: 640px) {
  .timeline-row {
    grid-template-columns: 140px 1fr;
    gap: var(--space-md);
  }
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.timeline-role-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.timeline-org {
  font-size: 0.875rem;
  color: var(--color-text);
  font-weight: 500;
  margin-bottom: 4px;
}

.timeline-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Skills List */
.skills-simple-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

@media (min-width: 580px) {
  .skills-simple-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.skill-category {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.skill-category-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.skill-simple-item {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  padding: 4px 0;
  border-bottom: 1px dashed var(--color-border-subtle);
}

.skill-simple-item strong {
  color: var(--color-text);
  font-weight: 600;
}

/* Contact */
.contact-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

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

.channel-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.channel-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.channel-val {
  font-weight: 500;
  color: var(--color-text);
}

.channel-val:hover {
  text-decoration: underline;
}

.form-simple {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-input {
  padding: 10px 12px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text);
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: #111111;
}

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

.form-error-msg {
  display: none;
  font-size: 0.75rem;
  color: #111111;
  font-weight: 500;
}

.form-group.invalid .form-input {
  border-color: #111111;
}

.form-group.invalid .form-error-msg {
  display: block;
}

.form-success-banner {
  display: none;
  padding: 12px 16px;
  background: #F5F5F5;
  border: 1px solid #D4D4D4;
  border-radius: var(--radius);
  color: #111111;
  font-size: 0.9rem;
}

.form-success-banner.show {
  display: block;
}

/* Toast */
.toast-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #111111;
  color: #FFFFFF;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 1000;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
}

.toast-notification.show {
  opacity: 1;
  transform: translateY(0);
}

/* Modal PDF */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 900;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-overlay.active {
  display: flex;
}

.modal-container {
  background: #FFFFFF;
  border-radius: var(--radius);
  width: 100%;
  max-width: 820px;
  height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.modal-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-body {
  flex: 1;
  background: #F5F5F5;
}

.modal-body iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-xl) 0;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  justify-content: space-between;
  align-items: flex-start;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

@media (min-width: 580px) {
  .footer-inner {
    flex-direction: row;
    align-items: center;
  }
}

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

.footer-links a {
  color: var(--color-text-secondary);
}

.footer-links a:hover {
  color: #111111;
  text-decoration: underline;
}