/* ==========================================================================
   Terrabit.nu — Stylesheet
   ========================================================================== */

/* --- Design tokens --- */
:root {
  --color-primary: #2d6a4f;
  --color-primary-dark: #1b4332;
  --color-primary-light: #40916c;
  --color-accent: #d4a373;
  --color-bg: #fefcf9;
  --color-bg-alt: #f4f1ec;
  --color-text: #1a2e1a;
  --color-text-muted: #5c6b5c;
  --color-white: #ffffff;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-width: 1100px;
  --section-padding: 6rem 1.5rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  border-radius: 6px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.15s ease;
  cursor: pointer;
  border: none;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(254, 252, 249, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
}

.nav__logo {
  height: 32px;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav__links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

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

.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  margin: 5px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* --- Hero --- */
.hero {
  padding: 8rem 1.5rem 6rem;
  text-align: center;
}

.hero__inner {
  max-width: 750px;
  margin: 0 auto;
}

.hero__badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  margin-bottom: 1.5rem;
  border-radius: 100px;
  background-color: var(--color-bg-alt);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 1.25rem;
}

.hero h1 span {
  color: var(--color-primary);
}

.hero p {
  font-size: 1.2rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

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

/* --- Problem / Solution --- */
.problem {
  padding: var(--section-padding);
  background-color: var(--color-bg-alt);
}

.problem__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.problem h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 2.5rem;
  max-width: 650px;
}

.problem__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.problem__col h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.problem__col h3 .icon {
  font-size: 1.3rem;
}

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

.problem__col ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-muted);
}

.problem__col ul li::before {
  position: absolute;
  left: 0;
  font-weight: 700;
}

.problem__before ul li::before {
  content: "\2013";
  color: #b85c3a;
}

.problem__after ul li::before {
  content: "\2713";
  color: var(--color-primary);
}

/* --- Features --- */
.features {
  padding: var(--section-padding);
}

.features__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.features h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.features > .features__inner > p {
  color: var(--color-text-muted);
  margin-bottom: 3rem;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  text-align: left;
}

.feature-card {
  background-color: var(--color-white);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 12px;
  padding: 2rem;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.feature-card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background-color: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1.25rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 1.6;
}

/* --- About --- */
.about {
  padding: var(--section-padding);
  background-color: var(--color-bg-alt);
}

.about__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1.5rem;
}

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

.about__highlight {
  background-color: var(--color-white);
  border-radius: 12px;
  padding: 2rem;
  border-left: 4px solid var(--color-primary);
}

.about__highlight p {
  font-size: 1rem;
  margin-bottom: 0;
  color: var(--color-text);
  font-style: italic;
}

/* --- CTA --- */
.cta {
  padding: var(--section-padding);
  text-align: center;
}

.cta__inner {
  max-width: 650px;
  margin: 0 auto;
  background-color: var(--color-primary-dark);
  border-radius: 16px;
  padding: 4rem 2.5rem;
  color: var(--color-white);
}

.cta h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.cta p {
  opacity: 0.85;
  margin-bottom: 2rem;
  font-size: 1.05rem;
}

.cta .btn--primary {
  background-color: var(--color-white);
  color: var(--color-primary-dark);
}

.cta .btn--primary:hover {
  background-color: var(--color-bg-alt);
}

.cta__contact {
  margin-top: 2rem;
  font-size: 0.95rem;
  opacity: 0.75;
}

.cta__contact a {
  color: var(--color-white);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* --- Footer --- */
.footer {
  padding: 2rem 1.5rem;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  text-align: center;
}

.footer p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --section-padding: 4rem 1.25rem;
  }

  /* Mobile nav */
  .nav__links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    padding: 1.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    gap: 1rem;
  }

  .nav__links.is-open {
    display: flex;
  }

  .nav__toggle {
    display: block;
  }

  /* Hero */
  .hero {
    padding: 5rem 1.25rem 4rem;
  }

  /* Problem grid */
  .problem__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* Features grid */
  .features__grid {
    grid-template-columns: 1fr;
  }

  /* About */
  .about__inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* CTA */
  .cta__inner {
    padding: 3rem 1.5rem;
  }
}