/*
 * style.css — Main stylesheet for kristiankroghbang.com
 *
 * Minimal, text-forward design for a technical consultant's personal site.
 * Uses DM Sans (headings) + Inter (body) with a three-color palette:
 *   - #394E7A (Dark Slate) — primary text and dark sections
 *   - #F5F6FA (Off-White)  — page background
 *   - #1B8BFE (Vibrant Blue) — links, accents, CTAs
 *
 * No frameworks, no build step. Pure CSS.
 */

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

/* ── Custom Properties ─────────────────────────────────── */
:root {
  --color-bg: #f5f6fa;
  --color-text: #394e7a;
  --color-text-light: #596d8d;
  --color-accent: #0c6fd4;
  --color-accent-hover: #0a5bb0;
  --color-dark: #394e7a;
  --color-dark-text: #f5f6fa;
  --color-border: #d8dce6;
  --color-card-bg: #ffffff;
  --font-heading: "DM Sans", sans-serif;
  --font-body: "Inter", sans-serif;
  --max-width: 720px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
}

/* ── Base ──────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background: var(--color-bg);
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  min-width: 100%;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Typography ────────────────────────────────────────── */
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text);
}

h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  margin-bottom: var(--space-sm);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-xs);
}

p {
  margin-bottom: var(--space-sm);
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s ease;
}

.nav-brand,
.nav-links a,
.contact-link,
.footer-links a,
.blog-item,
.testimonial-links a,
.social-links a {
  text-decoration: none;
}

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

ul {
  list-style: none;
  padding: 0;
}

/* ── Layout ────────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.page {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-xl);
  min-height: calc(100vh - 160px);
}

/* ── Navigation ────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: transform 0.25s ease;
}

.nav.nav-hidden {
  transform: translateY(-100%);
}

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

.nav-brand {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

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

.nav-links {
  display: flex;
  gap: var(--space-md);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* Mobile hamburger button */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  color: var(--color-text);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* ── Hero / Home Intro ─────────────────────────────────── */
.hero {
  padding: var(--space-xl) 0 var(--space-lg);
}

.hero h1 {
  margin-bottom: var(--space-xs);
}

.hero .tagline {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

/* ── Sections ──────────────────────────────────────────── */
.section {
  padding: var(--space-lg) 0;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

.section-label {
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
}

/* ── Achievement List ──────────────────────────────────── */
.achievements li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: var(--space-xs);
}

.achievements li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 600;
  font-family: monospace;
}

.highlight {
  background: var(--color-accent);
  color: #ffffff;
  padding: 0.1em 0.4em;
  border-radius: 3px;
  font-weight: 500;
}

/* ── Service Cards ─────────────────────────────────────── */
.services-grid {
  display: grid;
  gap: var(--space-md);
}

.service-card {
  padding: var(--space-md);
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  transition: border-color 0.15s ease;
}

.service-card:hover {
  border-color: var(--color-accent);
}

.service-card h3 {
  font-family: var(--font-heading);
  color: var(--color-text);
}

.service-card p {
  color: var(--color-text-light);
  margin-bottom: 0;
  font-size: 0.9375rem;
}

/* ── Testimonials ──────────────────────────────────────── */
.testimonials-grid {
  display: grid;
  gap: var(--space-md);
}

.testimonial {
  padding: var(--space-md);
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
}

.testimonial blockquote {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  font-style: italic;
}

.testimonial-author {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.testimonial-role {
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.testimonial-links {
  display: flex;
  gap: var(--space-sm);
  margin-top: 0.375rem;
  font-size: 0.8125rem;
}

.testimonial-links a {
  color: var(--color-text-light);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ── Blog List ─────────────────────────────────────────── */
.blog-list {
  display: grid;
  gap: var(--space-sm);
}

.blog-item {
  display: block;
  padding: var(--space-md);
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  text-decoration: none;
  transition: border-color 0.15s ease;
}

.blog-item:hover {
  border-color: var(--color-accent);
}

.blog-item-date {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-bottom: 0.25rem;
}

.blog-item-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.blog-item-excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

/* ── Blog Post ─────────────────────────────────────────── */
.post-meta {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-lg);
}

.post-content h2 {
  margin-top: var(--space-lg);
}

.post-content h3 {
  margin-top: var(--space-md);
}

.post-content ul,
.post-content ol {
  padding-left: 1.5rem;
  margin-bottom: var(--space-sm);
}

.post-content ul {
  list-style: disc;
}

.post-content ol {
  list-style: decimal;
}

.post-content li {
  margin-bottom: 0.25rem;
}

.post-content code {
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.875em;
  background: var(--color-border);
  padding: 0.125em 0.375em;
  border-radius: 3px;
}

.post-content pre {
  background: var(--color-dark);
  color: var(--color-dark-text);
  padding: var(--space-md);
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: var(--space-sm);
}

.post-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.post-content a {
  text-decoration: underline;
  text-underline-offset: 2px;
  word-break: break-word;
}

/* ── Contact ───────────────────────────────────────────── */
.contact-link {
  display: inline-block;
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 2px;
  transition:
    color 0.15s ease,
    border-color 0.15s ease;
}

.contact-link:hover {
  color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.social-links {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.social-links a {
  color: var(--color-text-light);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ── Footer ────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-sm) 2rem;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.footer p {
  margin-bottom: 0.25rem;
}

.footer p:last-child {
  margin-bottom: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xs) var(--space-md);
  margin-bottom: var(--space-xs);
}

.footer-links a {
  color: var(--color-text-light);
  text-decoration: none;
}

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

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 640px) {
  .container {
    padding: 0 2rem;
  }

  .nav .container {
    padding: 0 1.5rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) 1.5rem;
    gap: var(--space-sm);
  }

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

  .nav-toggle {
    display: block;
  }

  .page {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-lg);
  }

  .hero {
    padding: var(--space-lg) 0 var(--space-md);
  }

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

  .container {
    padding: 0 1.25rem;
  }

  .footer {
    padding: var(--space-md) 1.25rem;
  }

  .contact-link {
    font-size: 1.125rem;
  }
}