/* ============================================================
   samcrawford.dev — Stylesheet
   Light & clean portfolio design
   ============================================================ */

/* --- Variables --- */
:root {
  --color-bg: #FFFFFF;
  --color-surface: #F8F9FA;
  --color-text: #1A1A2E;
  --color-text-secondary: #6C757D;
  --color-accent: #2563EB;
  --color-accent-hover: #1D4ED8;
  --color-border: #E5E7EB;
  --color-tag-bg: #EFF6FF;
  --color-tag-text: #1E40AF;
  --color-success: #16A34A;
  --color-error: #DC2626;
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --max-width: 1200px;
  --radius: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

ul {
  list-style: none;
}

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

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
  text-align: center;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 48px;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
  text-align: center;
}

.btn-primary {
  background: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #FFFFFF;
}

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

.btn-outline:hover {
  background: var(--color-accent);
  color: #FFFFFF;
}

.btn-small {
  padding: 6px 16px;
  font-size: 0.875rem;
}

.btn-full {
  width: 100%;
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: color 0.2s;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
}

/* --- Hero --- */
.hero {
  padding: 100px 0 80px;
  text-align: center;
}

.hero-greeting {
  font-size: 1.1rem;
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 8px;
}

.hero-name {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.hero-title {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.visitor-count {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* --- Skills --- */
.skills {
  background: var(--color-surface);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 24px;
}

.skill-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.skill-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--color-accent);
}

.skill-card ul {
  list-style: none;
}

.skill-card li {
  padding: 4px 0;
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  position: relative;
  padding-left: 16px;
}

.skill-card li::before {
  content: "\2022";
  color: var(--color-accent);
  position: absolute;
  left: 0;
}

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

.project-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.project-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.project-placeholder {
  width: 100%;
  height: 180px;
  background: #F1F5F9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94A3B8;
  font-size: 0.875rem;
}

.project-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.project-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.project-description {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

.project-links {
  display: flex;
  gap: 8px;
}

/* --- Contact --- */
.contact {
  background: var(--color-surface);
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 6px;
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: var(--font-main);
  transition: border-color 0.2s;
  background: var(--color-bg);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-status {
  text-align: center;
  margin-top: 16px;
  font-size: 0.95rem;
}

.form-status-success {
  color: var(--color-success);
}

.form-status-error {
  color: var(--color-error);
}

/* --- Footer --- */
.footer {
  padding: 32px 0;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  border-top: 1px solid var(--color-border);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  }

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

  .hero-name {
    font-size: 2rem;
  }

  .hero {
    padding: 60px 0 48px;
  }

  section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

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

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

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

  .hero-links {
    flex-direction: column;
    align-items: center;
  }

  .hero-links .btn {
    width: 100%;
    max-width: 280px;
  }
}