/* Joshan Richard — COO Portfolio | Clean Minimal Design
   Professional, executive aesthetic | 2025 */

/* =============================
   Design Tokens
============================= */
:root {
  --bg: #FFFFFF;
  --bg-alt: #FAFAFA;
  --text: #1A1A1A;
  --muted: #6B7280;
  --border: #E5E7EB;
  --hover-bg: #F5F5F5;
  
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);

  --primary: #1E3A5F;
  --primary-600: #152A45;
  --secondary: #D4AF37;
  --secondary-600: #B8962F;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Helvetica, Arial, sans-serif;
  
  --radius-sm: 6px;
  --radius: 8px;
  --radius-lg: 12px;

  --container: 1120px;
  --section-y: 80px;
  --gap-sm: 12px;
  --gap: 20px;
  --gap-lg: 32px;
  
  --transition: 0.15s ease;
}

/* =============================
   Accessibility
============================= */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 12px 20px;
  text-decoration: none;
  font-weight: 600;
  z-index: 10000;
  border-radius: 0 0 var(--radius) 0;
  transition: top 0.3s ease;
}

.skip-to-content:focus {
  top: 0;
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
}

*:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

@media (max-width: 768px) {
  body {
    font-size: 17px;
    line-height: 1.7;
  }
}

img { 
  display: block; 
  max-width: 100%; 
  height: auto;
}

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

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

.section { padding: var(--section-y) 0; }

@media (max-width: 768px) {
  .section { padding: 48px 0; }
}

h1, h2, h3, h4 { 
  line-height: 1.3; 
  font-weight: 600;
  margin: 0 0 12px;
}

h1 { font-size: 48px; letter-spacing: -0.02em; }
h2 { font-size: 32px; }
h3 { font-size: 24px; }
h4 { font-size: 18px; }

@media (max-width: 768px) {
  h1 { font-size: 36px; }
  h2 { font-size: 28px; }
  h3 { font-size: 22px; }
}

p { 
  margin: 0 0 16px;
  opacity: 0.87;
  max-width: 70ch;
}

.muted { color: var(--muted); opacity: 1; }

.label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 8px;
}

/* =============================
   Navigation
============================= */
.nav-wrapper {
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
}

.nav-brand { 
  font-weight: 700; 
  font-size: 18px;
  padding: 0 12px;
  color: var(--primary);
}

.nav-brand a {
  color: var(--primary);
}

.nav-links { 
  display: flex; 
  gap: 4px;
  flex-grow: 1;
  justify-content: center;
}

.nav-links a {
  padding: 8px 16px; 
  border-radius: var(--radius);
  color: var(--text); 
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover {
  background: var(--hover-bg);
  color: var(--primary);
}

.nav-links a.active { 
  color: var(--text);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  gap: 8px;
}

.burger {
  display: none;
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg);
  cursor: pointer; 
  font-size: 15px;
  font-weight: 600;
  min-height: 44px;
  transition: var(--transition);
}

.mobile-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
}

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

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-actions { display: none; }
  .burger { display: flex; align-items: center; justify-content: center; }
  
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: var(--bg);
    border-left: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: 80px 20px 20px;
    gap: 8px;
    z-index: 1000;
    animation: slideInRight 0.3s ease;
  }
  
  .nav-links.mobile-open a {
    padding: 14px 20px;
    font-size: 16px;
  }
}

@keyframes slideInRight {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

/* =============================
   Buttons
============================= */
.btn {
  display: inline-flex; 
  align-items: center; 
  gap: 6px; 
  padding: 10px 20px; 
  border-radius: 999px;
  font-weight: 600; 
  font-size: 15px;
  border: 1px solid transparent; 
  cursor: pointer;
  transition: var(--transition);
  min-height: 44px;
  justify-content: center;
}

@media (max-width: 768px) {
  .btn {
    padding: 14px 24px;
    font-size: 16px;
    width: 100%;
  }
  
  .cta-row, .actions {
    flex-direction: column !important;
    gap: 12px !important;
  }
}

.btn-dark {
  background: var(--text);
  color: var(--bg);
}
.btn-dark:hover {
  background: #333;
}

.btn-primary { 
  background: var(--primary); 
  color: #fff; 
}
.btn-primary:hover { 
  background: var(--primary-600); 
}

.btn-secondary { 
  background: var(--secondary); 
  color: var(--text); 
}
.btn-secondary:hover { 
  background: var(--secondary-600); 
}

.btn-outline { 
  background: var(--bg); 
  color: var(--text); 
  border-color: var(--border); 
}
.btn-outline:hover { 
  background: var(--hover-bg); 
  border-color: var(--text);
}

/* =============================
   Hero
============================= */
.hero { padding: 60px 0 48px; }

.hero-grid {
  display: grid; 
  grid-template-columns: 1.5fr 1fr;
  gap: var(--gap-lg);
  align-items: center;
}

@media (max-width: 768px) {
  .hero { padding: 32px 0 24px; }
  .hero-grid { 
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.hero .title { margin-bottom: 16px; }
.hero .intro { 
  color: var(--muted); 
  max-width: 560px;
  margin-bottom: 24px;
}

.hero .cta-row { 
  display: flex; 
  gap: var(--gap-sm);
  flex-wrap: wrap;
}

.portrait-wrap { 
  display: flex; 
  justify-content: center; 
  align-items: center; 
}

.portrait {
  width: 100%;
  max-width: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 3px solid var(--border);
}

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

.hero-stats { 
  display: grid; 
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-sm); 
  margin-top: 32px;
}

.hero-grid > .hero-stats { grid-column: 1 / -1; }

@media (max-width: 768px) {
  .hero-stats { 
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .hero-grid .portrait-wrap { 
    order: -1; 
  }
}

.stat {
  padding: 16px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.stat:hover { 
  border-color: var(--muted);
  transform: translateY(-2px);
}

.stat strong { 
  display: block;
  font-size: 24px; 
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--primary);
}

.stat small { 
  display: block;
  color: var(--muted); 
  font-size: 14px;
}

/* =============================
   Cards & Grids
============================= */
.features-grid, .cards-grid {
  display: grid; 
  gap: var(--gap);
}

.features-grid { grid-template-columns: repeat(4, 1fr); }
.cards-grid { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .features-grid, .cards-grid { 
    grid-template-columns: 1fr;
  }
}

.feature-card, .card {
  background: var(--bg);
  border: 1px solid var(--border); 
  border-radius: var(--radius);
  padding: 20px; 
  transition: var(--transition);
}

.feature-card:hover, .card:hover {
  border-color: var(--muted);
  box-shadow: var(--shadow-sm);
}

.feature-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.feature-card h4, .card h3 { 
  margin-bottom: 8px; 
  font-weight: 600;
}

.feature-card p, .card p { 
  color: var(--muted); 
  font-size: 14px;
}

.card .subtitle {
  color: var(--muted);
  margin-bottom: 12px;
  font-size: 14px;
}

.card .actions { 
  margin-top: 20px; 
  display: flex; 
  gap: var(--gap-sm); 
}

/* =============================
   Split Layout
============================= */
.content-split {
  display: grid; 
  grid-template-columns: 1fr 1fr; 
  gap: var(--gap-lg);
  align-items: start;
}

@media (max-width: 768px) {
  .content-split { 
    grid-template-columns: 1fr;
  }
}

/* =============================
   CTA Block
============================= */
.cta-section {
  background: var(--bg-alt);
  border: 1px solid var(--border); 
  border-radius: var(--radius-lg); 
  padding: 32px; 
  display: grid; 
  grid-template-columns: 1.5fr 1fr; 
  gap: var(--gap-lg); 
  align-items: center;
}

@media (max-width: 768px) {
  .cta-section { 
    grid-template-columns: 1fr;
    padding: 24px 20px;
  }
}

.bg-gradient .cta-section {
  background: transparent;
  border: none;
  grid-template-columns: 1fr;
}

.bg-gradient .cta-section .actions { justify-content: center; }

.cta-section .actions { 
  display: flex; 
  gap: var(--gap-sm); 
  justify-content: flex-end;
  flex-wrap: wrap;
}

/* =============================
   Tech Stack
============================= */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap-lg);
  margin-top: var(--gap-lg);
}

.tech-category h4 {
  font-size: 18px;
  margin-bottom: 12px;
}

.tech-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  transition: var(--transition);
}

.tech-badge:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* =============================
   Achievement Grid
============================= */
.achievement-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--gap-lg);
  margin-top: var(--gap-lg);
}

.achievement-card {
  padding: 28px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.3s ease;
}

.achievement-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.achievement-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.achievement-card h4 {
  font-size: 20px;
  margin-bottom: 8px;
}

.achievement-card p {
  color: var(--muted);
  font-size: 15px;
}

/* =============================
   Premium CTA
============================= */
.bg-alt {
  background: var(--bg-alt);
}

.bg-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-600) 100%);
  color: white;
}

.cta-premium {
  text-align: center;
  padding: 48px 32px;
}

.cta-content {
  max-width: 720px;
  margin: 0 auto 32px;
}

.label-light {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: white;
}

.cta-premium h2 {
  color: white;
  margin-bottom: 16px;
  font-size: 36px;
}

.cta-premium p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 17px;
}

.cta-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.cta-stat strong {
  display: block;
  font-size: 32px;
  font-weight: 700;
  color: white;
}

.cta-stat small {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

.btn-primary-light {
  background: white;
  color: var(--primary);
  border: 2px solid white;
}
.btn-primary-light:hover {
  background: transparent;
  color: white;
}

.btn-outline-light {
  background: transparent;
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.5);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: white;
}

/* =============================
   Contact Grid
============================= */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap);
  margin-top: var(--gap-lg);
}

.contact-card {
  padding: 28px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all 0.3s ease;
  display: block;
}

.contact-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.contact-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.contact-card h4 {
  font-size: 18px;
  margin-bottom: 8px;
}

.contact-card p {
  color: var(--muted);
  font-size: 15px;
  margin-bottom: 12px;
}

.contact-link {
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
}

/* =============================
   About Page Layout
============================= */
.about-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--gap-lg);
  align-items: start;
}

.about-sidebar { position: sticky; top: 88px; }

.profile-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.profile-card .avatar img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.profile-name { margin-top: 12px; font-size: 20px; }

.pill-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 8px;
}

.pill {
  padding: 6px 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
}

.side-ctas { display: flex; gap: 8px; margin: 8px 0 12px; }

.side-nav { display: grid; gap: 6px; }
.side-link {
  padding: 8px 10px;
  border-radius: var(--radius);
  color: var(--muted);
  border: 1px solid transparent;
}
.side-link:hover { color: var(--text); background: var(--hover-bg); border-color: var(--border); }

.about-content { display: grid; gap: var(--gap-lg); }

.page-header .intro { color: var(--muted); max-width: 720px; }
.fact-strip { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.fact { padding: 6px 10px; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 999px; font-size: 13px; }

.about-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.quote-premium {
  margin-top: 12px;
  padding: 14px 16px;
  border-left: 4px solid var(--primary);
  background: var(--bg-alt);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap);
  margin-top: 12px;
}

.tile {
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: var(--radius);
  padding: 16px;
  transition: var(--transition);
}
.tile:hover { border-color: var(--muted); box-shadow: var(--shadow-sm); }

.skill-groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--gap); }
.badge-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

@media (max-width: 980px) {
  .about-layout { grid-template-columns: 1fr; }
  .about-sidebar { position: static; }
}

/* =============================
   Blog
============================= */
.blog-filters {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

.filter-tag {
  padding: 8px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.filter-tag:hover,
.filter-tag.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.blog-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
}

.blog-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.blog-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.blog-category {
  padding: 4px 10px;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
}

.blog-date {
  color: var(--muted);
  font-size: 13px;
}

.blog-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.blog-card h3 a:hover {
  color: var(--primary);
}

.blog-excerpt {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px;
}

.blog-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.read-time {
  color: var(--muted);
  font-size: 13px;
}

.read-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
}

/* =============================
   Timeline
============================= */
.timeline-premium {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  padding: 8px 0;
}

.tl-row {
  display: grid;
  grid-template-columns: 1fr 40px 1fr;
  align-items: center;
  gap: 12px;
  margin: 18px 0;
}

.tl-card {
  background: var(--bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  border-radius: 14px;
  padding: 16px 18px;
}

.tl-card h3 { font-size: 18px; margin-bottom: 6px; }
.tl-card p { font-size: 14px; color: var(--muted); }
.tl-card .tl-meta { font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }

.tl-left { grid-column: 1 / 2; }
.tl-right { grid-column: 3 / 4; }

.tl-connector {
  grid-column: 2 / 3;
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 999px;
  position: relative;
}

.tl-connector::before {
  content: '';
  position: absolute;
  left: 50%;
  top: -7px;
  transform: translateX(-50%);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--primary);
}

.tl-accent {
  background: linear-gradient(90deg, rgba(30,58,95,0.15), rgba(212,175,55,0.15));
  border-color: rgba(30,58,95,0.25);
}

.tl-vision {
  border: 2px solid var(--primary);
}

@media (max-width: 900px) {
  .tl-row { grid-template-columns: 1fr; }
  .tl-left, .tl-right { grid-column: auto; }
  .tl-connector { display: none; }
}

/* =============================
   Footer
============================= */
.footer { 
  padding: 32px 0; 
  color: var(--muted); 
  border-top: 1px solid var(--border);
  margin-top: 60px;
  font-size: 14px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-lg);
}

.footer-col h4 {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
}

/* =============================
   Back to Top
============================= */
#backToTop { 
  position: fixed; 
  right: 20px; 
  bottom: 20px; 
  opacity: 0; 
  pointer-events: none; 
  transition: var(--transition);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

#backToTop.show { 
  opacity: 1; 
  pointer-events: auto; 
}

/* =============================
   Utilities
============================= */
.text-center { text-align: center; }
.mt { margin-top: var(--gap); }
.mt-1 { margin-top: var(--gap-sm); }
.mt-2 { margin-top: var(--gap-lg); }
.mb-2 { margin-bottom: var(--gap-lg); }

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s, transform 0.4s;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}