/* ==========================================================================
   Senuke Weragama: Personal Portfolio Stylesheet
   Standard: Oxfords Design System (Zero Slop, Polished and Finished)
   Palette: Blueprint (Lead: #224D95, Support: #D93D7F, Pop: #EDEBDE)
   Base: Neutral Dark (#0A0A0A / #141414 / #2A2A2A / #F5F5F5)
   ========================================================================== */

/* Font Declaration: JetBrains Mono (Local WOFF2 for Zero-Latency Rendering) */
@font-face {
  font-family: "JetBrains Mono";
  src: url("resources/fonts/JetBrainsMono-2.304/fonts/webfonts/JetBrainsMono-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("resources/fonts/JetBrainsMono-2.304/fonts/webfonts/JetBrainsMono-Medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "JetBrains Mono";
  src: url("resources/fonts/JetBrainsMono-2.304/fonts/webfonts/JetBrainsMono-Bold.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Neutral Dark Base */
  --page: #0A0A0A;
  --raised: #141414;
  --raised-hover: #1C1C1E;
  --line: #2A2A2A;
  --line-strong: #3F3F46;
  --quiet: #A3A3A3;
  --text: #F5F5F5;

  /* Blueprint Palette Accents */
  --lead: #224D95;
  --lead-hover: #1C407C;
  --support: #D93D7F;
  --pop: #EDEBDE;
  --status-good: #28B467;

  /* Typography Stacks */
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: var(--page);
}

body {
  background-color: var(--page);
  color: var(--text);
  font: 16px/1.6 var(--font-sans);
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

::selection {
  background: var(--lead);
  color: #FFFFFF;
}

/* High Contrast Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

/* Layout Container */
.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography Hierarchy */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.15;
}

h1 {
  font-size: clamp(32px, 5vw, 44px);
  margin-bottom: 16px;
}

h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--quiet);
  margin-bottom: 28px;
}

.mono-accent {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* Header & Top Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.brand-dot {
  width: 10px;
  height: 10px;
  background-color: var(--lead);
  border-radius: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--quiet);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 120ms ease-out;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 20px;
  border-radius: 6px;
  border: 1px solid transparent;
  font: 600 15px/1 var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  color: #FFFFFF;
  transition: background-color 120ms ease-out, border-color 120ms ease-out, transform 100ms ease-out;
}

.btn:active {
  transform: translateY(1px);
}

.btn-lead {
  background-color: var(--lead);
  color: #FFFFFF;
}

.btn-lead:hover {
  background-color: var(--lead-hover);
}

a.btn-gmail,
.btn-gmail {
  background-color: #EA4335;
  color: #FFFFFF;
  border-color: #EA4335;
}

a.btn-gmail:hover,
.btn-gmail:hover {
  background-color: #D93025;
  border-color: #D93025;
  color: #FFFFFF;
}

a.btn-linkedin,
.btn-linkedin {
  background-color: #0A66C2;
  color: #FFFFFF;
  border-color: #0A66C2;
}

a.btn-linkedin:hover,
.btn-linkedin:hover {
  background-color: #004182;
  border-color: #004182;
  color: #FFFFFF;
}

a.btn-fiverr,
.btn-fiverr {
  background-color: #1DBF73;
  color: #FFFFFF;
  border-color: #1DBF73;
}

a.btn-fiverr:hover,
.btn-fiverr:hover {
  background-color: #19A463;
  border-color: #19A463;
  color: #FFFFFF;
}

.btn-neutral {
  background-color: var(--text);
  color: var(--page);
  border-color: var(--text);
}

.btn-neutral:hover {
  background-color: #E4E4E7;
}

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

.btn-outline:hover {
  background-color: var(--raised);
  border-color: var(--line-strong);
}

.btn-sm {
  height: 38px;
  padding: 0 14px;
  font-size: 13px;
}

/* Hero Section */
.hero-section {
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 40px;
  align-items: start;
}

.hero-portrait {
  width: 144px;
  height: 144px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background-color: var(--raised);
  object-fit: cover;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--quiet);
  margin-bottom: 16px;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--status-good);
  border-radius: 50%;
}

.hero-title {
  margin-bottom: 12px;
}

.hero-title span {
  color: var(--quiet);
}

.hero-bio {
  font-size: 17px;
  line-height: 1.6;
  color: var(--quiet);
  max-width: 64ch;
  margin-bottom: 24px;
}

.hero-bio strong {
  color: var(--text);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Sections */
.content-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
}

/* Chips & Filter Bar */
.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.chip {
  display: inline-flex;
  align-items: center;
  height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--page);
  color: var(--quiet);
  font: 500 13px/1 var(--font-sans);
  cursor: pointer;
  transition: background-color 120ms ease-out, border-color 120ms ease-out, color 120ms ease-out;
}

.chip:hover {
  background-color: var(--raised);
  color: var(--text);
  border-color: var(--line-strong);
}

.chip[aria-pressed="true"] {
  background-color: var(--text);
  color: var(--page);
  border-color: var(--text);
  font-weight: 600;
}

/* Project Cards Grid */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-card {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 24px;
  background-color: var(--raised);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  transition: border-color 140ms ease-out, background-color 140ms ease-out;
}

.project-card:hover {
  border-color: var(--line-strong);
  background-color: var(--raised-hover);
}

.project-logo {
  width: 72px;
  height: 72px;
  border-radius: 6px;
  background-color: var(--page);
  border: 1px solid var(--line);
  object-fit: contain;
  padding: 8px;
}

.project-details h3 {
  font-size: 18px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.project-badge-hackathon {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 3px 8px;
  border-radius: 4px;
  background-color: #271E19;
  color: #F89B5F;
  border: 1px solid #442E20;
}

.project-description {
  font-size: 14px;
  color: var(--quiet);
  line-height: 1.5;
  margin-bottom: 12px;
  max-width: 68ch;
}

.tags-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 8px;
  border-radius: 4px;
  background-color: var(--page);
  border: 1px solid var(--line);
  font: 500 12px/1 var(--font-mono);
  color: var(--quiet);
}

.tag.tag-featured {
  color: var(--text);
  border-color: var(--line-strong);
}

.project-external-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--quiet);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color 120ms ease-out;
}

.project-card:hover .project-external-link {
  color: var(--text);
}

/* Skills & Technical Competencies */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.skill-panel {
  background-color: var(--raised);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px 24px;
}

.skill-panel h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.skill-items {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Education & Certifications Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.timeline-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  padding: 24px;
  background-color: var(--raised);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.timeline-period {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--quiet);
}

.timeline-content h3 {
  font-size: 17px;
  margin-bottom: 4px;
}

.timeline-institution {
  font-size: 14px;
  font-weight: 500;
  color: var(--quiet);
  margin-bottom: 10px;
}

.timeline-summary {
  font-size: 14px;
  color: var(--quiet);
  line-height: 1.5;
}

/* Contact & Channels Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.contact-channels {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background-color: var(--raised);
  border: 1px solid var(--line);
  border-radius: 6px;
  text-decoration: none;
  color: var(--text);
  font-size: 14px;
  transition: border-color 120ms ease-out, background-color 120ms ease-out;
}

.contact-item:hover {
  border-color: var(--line-strong);
  background-color: var(--raised-hover);
}

.contact-label {
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}

.contact-value {
  font-family: var(--font-mono);
  color: var(--quiet);
  font-size: 13px;
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.form-input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  font: 16px/1 var(--font-sans);
  background-color: var(--raised);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  transition: border-color 120ms ease-out;
}

textarea.form-input {
  height: 110px;
  padding: 14px 16px;
  resize: vertical;
  line-height: 1.5;
}

.form-input:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 1px;
  border-color: var(--text);
}

.form-input[aria-invalid="true"] {
  border-color: #E14543;
}

.field-error {
  font-size: 13px;
  color: #E14543;
  display: none;
}

.field-hint {
  font-size: 13px;
  color: var(--quiet);
}

.form-group.has-error .field-error {
  display: block;
}

.form-group.has-error .field-hint {
  display: none;
}

.form-status {
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 14px;
  display: none;
}

.form-status.status-success {
  display: block;
  background-color: #16261A;
  border: 1px solid #285432;
  color: #79D998;
}

/* Footer */
.site-footer {
  padding: 40px 0;
  background-color: var(--page);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--quiet);
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a {
  color: var(--quiet);
  text-decoration: none;
  transition: color 120ms ease-out;
}

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

/* Toast Notification (Copy Feedback) */
.toast-notice {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background-color: var(--text);
  color: var(--page);
  padding: 12px 20px;
  border-radius: 6px;
  font: 600 14px/1 var(--font-sans);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 150ms ease-out, transform 150ms ease-out;
  z-index: 200;
}

.toast-notice.toast-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-portrait {
    width: 96px;
    height: 96px;
  }

  .project-card {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .timeline-card {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .nav-links {
    gap: 16px;
  }
}

/* Strict Oxfords Motion Standard: Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .btn,
  .chip,
  .project-card,
  .contact-item,
  .form-input,
  .nav-links a,
  .footer-links a,
  .toast-notice {
    transition: none !important;
  }
}