/* ============================================
   PERSONAL PORTFOLIO — GLOBAL STYLES
   ============================================ */

/* --- CSS Variables (Color Palette) --- */
:root {
  --color-primary:     #3A7CA5;
  --color-secondary:   #F4A261;
  --color-bg:          #F5F7FA;
  --color-surface:     #FFFFFF;
  --color-text:        #2D2D2D;
  --color-muted:       #6C757D;
  --color-accent:      #2A9D8F;
  --color-highlight:   #E3F2FD;
  --color-warm:        #8B5E3C;

  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;

  --shadow-sm:  0 2px 8px rgba(0,0,0,.08);
  --shadow-md:  0 4px 20px rgba(0,0,0,.12);
  --shadow-lg:  0 8px 40px rgba(0,0,0,.16);

  --transition: all .2s ease;

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover { color: var(--color-secondary); }

ul { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; }
h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.2rem; }

.section-label {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: .5rem;
}

.section-title {
  margin-bottom: .75rem;
}

.section-subtitle {
  color: var(--color-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin-bottom: 2.5rem;
}

/* --- Layout Helpers --- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,.06);
}

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

.nav-logo {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--color-primary);
  letter-spacing: -.01em;
}
.nav-logo span { color: var(--color-secondary); }

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-muted);
  padding: .25rem 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: .25rem;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2563a8 100%);
  color: #fff;
  padding: 6rem 0 5rem;
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero .container {
  position: relative;
  display: flex;
  align-items: center;
  gap: 3rem;
}

.hero-text { flex: 1; }

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.3);
  color: #fff;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  padding: .35rem .9rem;
  border-radius: 100px;
  margin-bottom: 1.25rem;
}

.hero h1 {
  margin-bottom: 1rem;
  color: #fff;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-secondary);
}

.hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,.85);
  max-width: 500px;
  margin-bottom: 2rem;
  line-height: 1.75;
}

.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-image {
  flex-shrink: 0;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid rgba(255,255,255,.3);
  box-shadow: var(--shadow-lg);
}
.hero-image img { width: 100%; height: 100%; object-fit: cover; }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-weight: 600;
  font-size: .9rem;
  padding: .65rem 1.4rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-secondary);
  color: #fff;
  border-color: var(--color-secondary);
}
.btn-primary:hover {
  background: #e8924d;
  border-color: #e8924d;
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(244,162,97,.4);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
  color: #fff;
}

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

.btn-sm {
  font-size: .8rem;
  padding: .45rem 1rem;
}

/* ============================================
   TAGS
   ============================================ */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 1rem;
}

.tag {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  padding: .25rem .65rem;
  border-radius: 100px;
  background: rgba(42,157,143,.12);
  color: var(--color-accent);
  border: 1px solid rgba(42,157,143,.25);
}

/* ============================================
   CARDS (shared)
   ============================================ */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid rgba(0,0,0,.05);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* ============================================
   PORTFOLIO SECTION
   ============================================ */
#portfolio { background: var(--color-bg); }

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.project-card .card-body {
  padding: 1.5rem;
}

.project-card h3 {
  margin-bottom: .5rem;
  color: var(--color-text);
}

.project-card .description {
  color: var(--color-muted);
  font-size: .9rem;
  margin-bottom: 1.25rem;
  line-height: 1.65;
}

.project-card .card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid rgba(0,0,0,.05);
  display: flex;
  gap: .75rem;
  background: rgba(0,0,0,.015);
}

/* ============================================
   ARTICLES SECTION
   ============================================ */
#articles { background: var(--color-highlight); }

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.article-card a.card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
}
.article-card a.card-link:hover { color: inherit; }

.article-card .card-body {
  padding: 1.5rem;
  flex: 1;
}

.article-card .card-meta {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-bottom: .75rem;
}

.article-card .date {
  font-size: .78rem;
  color: var(--color-muted);
}

.article-card h3 {
  margin-bottom: .5rem;
  color: var(--color-text);
  transition: var(--transition);
}
.article-card:hover h3 { color: var(--color-primary); }

.article-card .excerpt {
  color: var(--color-muted);
  font-size: .9rem;
  line-height: 1.65;
}

.article-card .card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid rgba(0,0,0,.05);
}

.read-more {
  font-size: .85rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: .3rem;
}
.read-more::after { content: '→'; transition: var(--transition); }
.article-card:hover .read-more::after { transform: translateX(4px); }

/* ============================================
   POLICIES SECTION
   ============================================ */
#policies { background: var(--color-bg); }

.policies-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.5rem;
}

.policy-card .card-body {
  padding: 1.5rem;
}

.policy-card .app-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.policy-card h3 {
  margin-bottom: .35rem;
}

.policy-card .app-desc {
  color: var(--color-muted);
  font-size: .88rem;
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.policy-links {
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
}

.policy-link {
  font-size: .8rem;
  font-weight: 600;
  padding: .35rem .85rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(58,124,165,.3);
  color: var(--color-primary);
  transition: var(--transition);
}
.policy-link:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ============================================
   ABOUT SECTION
   ============================================ */
#about { background: var(--color-highlight); }

.about-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: center;
}

.about-photo {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.about-photo img { width: 100%; height: 100%; object-fit: cover; }

.about-text h2 { margin-bottom: 1rem; }

.about-text p {
  color: var(--color-muted);
  margin-bottom: 1rem;
  line-height: 1.75;
}

.skills {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.5rem;
}

.skill-badge {
  font-size: .8rem;
  font-weight: 600;
  padding: .3rem .75rem;
  border-radius: 100px;
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid rgba(58,124,165,.25);
  box-shadow: var(--shadow-sm);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: #1a2332;
  color: rgba(255,255,255,.65);
  padding: 3rem 0 2rem;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.footer-brand .nav-logo {
  color: #fff;
  font-size: 1.1rem;
  display: block;
  margin-bottom: .5rem;
}

.footer-brand p { font-size: .88rem; }

.footer-links {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.footer-links a {
  font-size: .88rem;
  color: rgba(255,255,255,.6);
}
.footer-links a:hover { color: var(--color-secondary); }

.social-links {
  display: flex;
  gap: .75rem;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.6);
  font-size: .85rem;
  transition: var(--transition);
}
.social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 1.5rem;
  font-size: .82rem;
  text-align: center;
}

/* ============================================
   SUBPAGE LAYOUT (articles / policies)
   ============================================ */
.subpage-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, #2563a8 100%);
  color: #fff;
  padding: 4rem 0 3rem;
}

.subpage-hero h1 { color: #fff; margin-bottom: .5rem; }
.subpage-hero p { color: rgba(255,255,255,.8); }

.breadcrumb {
  font-size: .85rem;
  color: rgba(255,255,255,.65);
  margin-bottom: 1rem;
}
.breadcrumb a { color: rgba(255,255,255,.8); }
.breadcrumb a:hover { color: #fff; }

/* Article / Policy prose */
.prose-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

.prose-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(0,0,0,.08);
}

.prose-meta .date {
  font-size: .85rem;
  color: var(--color-muted);
}

.prose h2 { margin: 2rem 0 .75rem; color: var(--color-text); }
.prose h3 { margin: 1.5rem 0 .5rem; color: var(--color-text); }
.prose p { color: var(--color-muted); line-height: 1.8; margin-bottom: 1rem; }
.prose ul, .prose ol { padding-left: 1.5rem; color: var(--color-muted); margin-bottom: 1rem; }
.prose li { margin-bottom: .4rem; line-height: 1.7; }
.prose code {
  font-family: var(--font-mono);
  font-size: .87em;
  background: var(--color-highlight);
  padding: .1em .4em;
  border-radius: 4px;
  color: var(--color-accent);
}
.prose pre {
  background: #1a2332;
  color: #e2e8f0;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 1.25rem;
}
.prose pre code { background: none; color: inherit; padding: 0; }
.prose a { color: var(--color-primary); }
.prose a:hover { color: var(--color-secondary); }
.prose blockquote {
  border-left: 4px solid var(--color-accent);
  padding-left: 1rem;
  color: var(--color-muted);
  font-style: italic;
  margin: 1.5rem 0;
}
.prose hr { border: none; border-top: 1px solid rgba(0,0,0,.1); margin: 2rem 0; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    border-bottom: 1px solid rgba(0,0,0,.06);
    padding: .5rem 0;
    box-shadow: var(--shadow-md);
  }
  .nav-links.open { display: flex; }
  .nav-links a {
    width: 100%;
    padding: .75rem 1.5rem;
    border-bottom: none;
    border-left: 3px solid transparent;
  }
  .nav-links a.active,
  .nav-links a:hover {
    border-left-color: var(--color-primary);
    background: var(--color-highlight);
  }
  .nav-toggle { display: flex; }
  .navbar { position: relative; }

  .hero .container { flex-direction: column-reverse; text-align: center; }
  .hero-image { width: 160px; height: 160px; }
  .hero-actions { justify-content: center; }
  .hero p { margin: 0 auto 2rem; }

  .about-inner { grid-template-columns: 1fr; }
  .about-photo { max-width: 260px; margin: 0 auto; }

  .footer-inner { flex-direction: column; }
}

@media (max-width: 480px) {
  section { padding: 3.5rem 0; }
  .portfolio-grid,
  .articles-grid,
  .policies-grid { grid-template-columns: 1fr; }
}