/* ============================================================
   CSS CUSTOM PROPERTIES
   Centralized tokens — change a value here to update the
   whole site. Using HSL makes it easy to derive lighter/
   darker shades without a preprocessor.
   ============================================================ */
:root {
  /* Colors */
  --color-bg:        #fbfbfb;
  --color-surface:   #ffffff;
  --color-border:    #d6d0c4;
  --color-primary:   #142e73;
  --color-secondary: #547792;
  --color-accent:    #FAB95B;
  --color-text:      #121e3d;
  --color-muted:     #121e3d;

  /* Typography */
  --font-body:    'Noto Serif', 'Georgia', serif;
  --font-heading: 'Syne', 'Arial', serif;

  /* Spacing scale (mobile-first base) */
  --space-sm:  0.75rem;
  --space-md:  1.5rem;
  --space-lg:  3rem;
  --space-xl:  6rem;

  /* Misc */
  --radius:     4px;
  --transition: 0.2s ease;
  --max-width:  1100px;
}

/* ============================================================
   RESET & BASE
   Minimal reset so we start from a predictable baseline.
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  /* Smooth scrolling when clicking anchor links */
  scroll-behavior: smooth;
  /* Prevent font size inflation on mobile */
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 1rem;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius);
}

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

ul {
  list-style: none;
}

/* ============================================================
   REUSABLE UTILITIES
   ============================================================ */

/* Centers content and limits line width */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

/* Consistent vertical rhythm between sections */
.section {
  padding-block: var(--space-xl);
}

/* Section headings with an accent underline */
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: var(--space-lg);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 2px;
}

/* ============================================================
   BUTTONS
   Two variants: filled primary and outlined ghost.
   ============================================================ */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ============================================================
   NAVIGATION
   Sticky header; collapses to hamburger on mobile.
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem var(--space-md);
}

.nav-brand {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

/* Nav links — hidden on mobile, shown via .is-open class (toggled in JS) */
.nav-links {
  display: none;
  flex-direction: column;
  gap: var(--space-sm);
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-surface);
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.nav-links.is-open {
  display: flex;
}

.nav-links a {
  color: var(--color-muted);
  font-family: 'Syne', sans-serif;
  font-size: 1.3rem;
  font-weight: 500;
  text-transform: uppercase;
  transition: color var(--transition);
}

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

/* Hamburger button */
.nav-toggle {
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* ── Desktop nav (≥ 640 px) ── */
@media (min-width: 640px) {
  .nav-toggle {
    display: none;
  }

  .nav-links {
    display: flex;              /* always visible */
    flex-direction: row;
    position: static;
    background: none;
    padding: 0;
    border: none;
    gap: 2rem;
  }
}

/* ============================================================
   HERO
   Full-viewport-height opening section.
   ============================================================ */
.hero {
  min-height: 100svh;           /* svh = small viewport height (mobile-safe) */
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-lg) var(--space-md);
  /* Subtle radial gradient gives depth without an image */
  background: radial-gradient(ellipse at 60% 40%, #dcd5c0 0%, var(--color-bg) 70%);
}

.hero-greeting {
  color: var(--color-primary);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: 40px;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero-tagline {
  color: var(--color-muted);
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  margin-bottom: var(--space-lg);
}

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

/* ============================================================
   ABOUT
   Two-column layout on larger screens.
   ============================================================ */
.about {
  background: var(--color-surface);
}

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

.about-text p + p {
  margin-top: 1rem;
}

.about-image img {
  width: 100%;
  max-width: 320px;
  margin-inline: auto;
  border: 3px solid var(--color-border);
}

@media (min-width: 768px) {
  .about-grid {
    /* Text on the left, image on the right */
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

/* ============================================================
   PROJECTS
   Responsive card grid — columns collapse gracefully.
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  transition: transform var(--transition), border-color var(--transition);
  position: relative;
  cursor: pointer;
}

/* Stretch the case study link to cover the entire card */
.project-card .cs-link::after {
  content: '';
  position: absolute;
  inset: 0;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.project-card--coming-soon {
  opacity: 0.45;
  border-style: dashed;
  justify-content: center;
  align-items: center;
  text-align: center;
  min-height: 120px;
}

.project-card--coming-soon:hover {
  transform: none;
  border-color: var(--color-border);
}

.project-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
}

.project-card p {
  color: var(--color-muted);
  font-size: 0.9rem;
  flex: 1;                      /* pushes links to the bottom */
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.project-tag {
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
  background: var(--color-bg);
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.project-links {
  display: flex;
  gap: 1rem;
  margin-top: auto;
}

.project-links a {
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  transition: color var(--transition);
}

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

.project-links .btn-outline:hover {
  color: #fff;
}

.cs-link {
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap 0.2s, color 0.2s;
}

.cs-link:hover {
  color: var(--color-primary);
  gap: 0.7rem;
}

/* ============================================================
   SKILLS
   Wrapping pill tags.
   ============================================================ */
.skills {
  background: var(--color-surface);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-tag {
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--color-border);
  border-radius: 99px;
  font-size: 0.9rem;
  background: var(--color-bg);
  transition: border-color var(--transition), color var(--transition);
}

.skill-tag:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============================================================
   CONTACT
   Stacked form with social links below.
   ============================================================ */
.contact-intro {
  color: var(--color-muted);
  margin-bottom: var(--space-md);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  max-width: 560px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
}

.form-group input,
.form-group textarea {
  padding: 0.7rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-status {
  font-size: 0.9rem;
  min-height: 1.2em;           /* prevent layout shift when text appears */
}

.form-status.success { color: #6fcf97; }
.form-status.error   { color: #eb5757; }

/* Social icons row */
.social-links {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.social-links a {
  font-size: 1.6rem;
  color: var(--color-muted);
  transition: color var(--transition), transform var(--transition);
}

.social-links a:hover {
  color: var(--color-primary);
  transform: translateY(-3px);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  text-align: center;
  padding: var(--space-md);
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.85rem;
}