/* ============================================================
   CSS Custom Properties
   ============================================================ */
:root {
  --color-bg:          #f8f9fa;
  --color-text:        #1a2332;
  --color-accent:      #2d5a1b;
  --color-accent-dark: #1e3d12;
  --color-secondary-bg: #e8edf2;
  --color-nav-bg:      #1a2332;
  --color-white:       #ffffff;
  --color-muted:       #4a5568;
  --font-main:         'Inter', sans-serif;
  --max-width:         800px;
  --section-padding:   60px;
}

/* ============================================================
   Base / Reset
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 1.05rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  margin: 0;
  padding: 0;
}

/* ============================================================
   Navigation
   ============================================================ */
#main-nav {
  background-color: var(--color-nav-bg);
  padding-top: 0.85rem;
  padding-bottom: 0.85rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

#main-nav .navbar-brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-white);
  text-decoration: none;
  letter-spacing: 0.01em;
}

#main-nav .navbar-brand:hover,
#main-nav .navbar-brand:focus {
  color: #a8c89a;
}

#main-nav .nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
  text-decoration: none;
  padding-left: 1rem;
  padding-right: 1rem;
  transition: color 0.2s ease;
}

#main-nav .nav-link:hover,
#main-nav .nav-link:focus {
  color: #a8c89a;
}

/* ============================================================
   Shared container constraint
   ============================================================ */
.container {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

.section-inner {
  padding-top: var(--section-padding);
  padding-bottom: var(--section-padding);
}

/* ============================================================
   Section headings
   ============================================================ */
.section-heading {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

/* ============================================================
   Alternating section backgrounds
   ============================================================ */
.section-alt {
  background-color: var(--color-secondary-bg);
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero-section {
  background-color: var(--color-nav-bg);
  padding-top: 80px;
  padding-bottom: 80px;
  text-align: center;
}

.hero-photo {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--color-accent);
  margin-bottom: 1.5rem;
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.hero-name {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.hero-tagline {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.78);
  font-weight: 400;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

/* ============================================================
   About Section
   ============================================================ */
#about p {
  color: var(--color-text);
  margin-bottom: 1.1rem;
}

#about p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   Skills Section
   ============================================================ */
.skill-category-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
  margin-top: 1.5rem;
}

.skill-category-label:first-of-type {
  margin-top: 0;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.skill-tag {
  display: inline-block;
  padding: 0.35em 0.9em;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.4;
}

.skill-tag--accent {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.skill-tag--secondary {
  background-color: var(--color-secondary-bg);
  color: var(--color-text);
  border: 1px solid #c5d0dc;
}

/* ============================================================
   Projects Section
   ============================================================ */
.project-card {
  background-color: var(--color-white);
  border: 1px solid #d1dce8;
  border-radius: 8px;
  padding: 1.5rem;
  height: 100%;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.project-card:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.project-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.3rem;
}

.project-meta {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 0.85rem;
  font-weight: 500;
}

.project-card p:last-child {
  margin-bottom: 0;
  color: var(--color-text);
}

/* ============================================================
   Contact Section
   ============================================================ */
.contact-intro {
  color: var(--color-muted);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 2rem;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.contact-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: var(--color-nav-bg);
  color: var(--color-white);
  text-decoration: none;
  padding: 0.55em 1.2em;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.contact-badge i {
  font-size: 1.1rem;
}

.contact-badge:hover,
.contact-badge:focus {
  background-color: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-1px);
  outline-offset: 3px;
}

.contact-badge:focus-visible {
  outline: 3px solid var(--color-accent);
}

/* ============================================================
   Footer
   ============================================================ */
footer {
  background-color: var(--color-nav-bg);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
  padding: 1.25rem 0;
}

footer p {
  margin: 0;
}

/* ============================================================
   Responsive Adjustments
   ============================================================ */
@media (max-width: 767px) {
  .hero-name {
    font-size: 1.9rem;
  }

  .hero-tagline {
    font-size: 0.925rem;
  }

  .hero-photo {
    width: 175px;
    height: 175px;
  }

  .section-heading {
    font-size: 1.3rem;
  }

  :root {
    --section-padding: 40px;
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: 1.6rem;
  }

  .hero-tagline {
    font-size: 0.875rem;
  }
}

@media (max-width: 360px) {
  body {
    font-size: 0.97rem;
  }

  .contact-badge {
    font-size: 0.875rem;
    padding: 0.5em 1em;
  }
}