/* ==========================================================================
   MindTech Coaching — style.css
   Premium, minimal, mobile-first. No frameworks, no gradients.
   ========================================================================== */

/* ---------- 1. Design tokens ---------- */
:root {
  /* Color */
  --color-bg: #ffffff;
  --color-bg-tinted: #f7f9f8;
  --color-ink: #101614;
  --color-ink-soft: #5b6662;
  --color-accent: #1e3d32;        /* MindTech deep green */
  --color-accent-hover: #163027;
  --color-line: #e7ecea;
  --color-card: #ffffff;

  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing scale */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 7rem;

  /* Misc */
  --radius: 18px;
  --radius-small: 12px;
  --shadow-soft: 0 1px 2px rgba(16, 22, 20, 0.04), 0 10px 30px rgba(16, 22, 20, 0.06);
  --shadow-hover: 0 2px 4px rgba(16, 22, 20, 0.05), 0 18px 44px rgba(16, 22, 20, 0.10);
  --max-width: 1080px;
  --nav-height: 72px;
}

/* ---------- 2. Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 16px);
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem; /* 17px */
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* ---------- 3. Typography ---------- */
h1,
h2,
h3 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-ink);
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
  font-size: 1.25rem;
}

.eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-2);
}

/* ---------- 4. Buttons ---------- */
.btn {
  display: inline-block;
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.8125rem 1.75rem;
  border-radius: 999px;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
  will-change: transform;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--color-accent);
  color: #ffffff;
  box-shadow: var(--shadow-soft);
}

.btn--primary:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-hover);
}

.btn--ghost {
  color: var(--color-ink);
  border: 1.5px solid var(--color-line);
  background: var(--color-bg);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--small {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
}

.btn--large {
  padding: 1rem 2.25rem;
  font-size: 1.0625rem;
}

/* ---------- 5. Navigation ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.nav.is-scrolled {
  border-bottom-color: var(--color-line);
  box-shadow: 0 1px 0 rgba(16, 22, 20, 0.02);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav__logo {
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__menu a:not(.btn) {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 0.15s ease;
}

.nav__menu a:not(.btn):hover {
  color: var(--color-ink);
}

/* Hamburger (mobile) */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 0 auto;
  background: var(--color-ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ---------- 6. Hero ---------- */
.hero {
  padding: var(--space-6) 0;
  text-align: center;
}

.hero__inner {
  max-width: 720px;
}

.hero__title {
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-3);
}

.hero__sub {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 500;
  color: var(--color-ink);
  margin-bottom: var(--space-2);
}

.hero__text {
  color: var(--color-ink-soft);
  max-width: 34em;
  margin: 0 auto var(--space-4);
}

.hero__actions {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* ---------- 7. Sections (shared) ---------- */
.section {
  padding: var(--space-6) 0;
}

.section--tinted {
  background: var(--color-bg-tinted);
}

.section__head {
  max-width: 640px;
  margin: 0 auto var(--space-5);
  text-align: center;
}

.section__lead {
  color: var(--color-ink-soft);
  margin-top: var(--space-2);
}

/* ---------- 8. About ---------- */
.about__inner {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: var(--space-5);
  align-items: center;
}

.portrait-placeholder {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius);
  background: var(--color-bg-tinted);
  border: 1px solid var(--color-line);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  color: var(--color-ink-soft);
  font-size: 0.875rem;
}

.about__content h2 {
  margin-bottom: var(--space-3);
}

.about__content p {
  color: var(--color-ink-soft);
  margin-bottom: var(--space-2);
}

.about__credentials {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-top: var(--space-3);
}

.about__credentials li {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-accent);
  background: var(--color-bg-tinted);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 0.375rem 0.875rem;
}

/* ---------- 9. Products ---------- */
.products__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  max-width: 880px;
  margin: 0 auto;
}

.product-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.product-card p {
  color: var(--color-ink-soft);
  flex-grow: 1;
}

.product-card__badge {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-bg-tinted);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
}

.product-card__badge--premium {
  color: #ffffff;
  background: var(--color-accent);
  border-color: var(--color-accent);
}

/* ---------- 10. Why MindTech ---------- */
.why__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}

.feature-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-3);
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-2);
  border-radius: var(--radius-small);
  background: var(--color-bg-tinted);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-card__icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  margin-bottom: var(--space-1);
}

.feature-card p {
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
}

/* ---------- 11. Final CTA ---------- */
.cta__inner {
  text-align: center;
  max-width: 640px;
}

.cta h2 {
  margin-bottom: var(--space-2);
}

.cta__text {
  color: var(--color-ink-soft);
  margin-bottom: var(--space-4);
}

/* ---------- 12. Contact ---------- */
.contact__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  max-width: 880px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-4) var(--space-3);
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  text-decoration: none;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-soft);
  border-color: var(--color-accent);
}

.contact-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-small);
  background: var(--color-bg-tinted);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-1);
}

.contact-card__icon svg {
  width: 20px;
  height: 20px;
}

.contact-card__label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
}

.contact-card__value {
  font-weight: 500;
  color: var(--color-ink);
}

/* ---------- 13. Footer ---------- */
.footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-4) 0;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.footer__logo {
  font-weight: 700;
}

.footer__tagline {
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
}

.footer__copy-inline {
  color: var(--color-ink-soft);
  font-size: 0.875rem;
}

/* ---------- 14. Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 15. Responsive ---------- */
@media (max-width: 900px) {
  .about__inner {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .about__portrait {
    max-width: 340px;
  }

  .why__grid {
    grid-template-columns: 1fr;
    max-width: 480px;
    margin: 0 auto;
  }

  .products__grid {
    grid-template-columns: 1fr;
    max-width: 480px;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    max-width: 480px;
  }
}

@media (max-width: 720px) {
  .section,
  .hero {
    padding: var(--space-5) 0;
  }

  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    align-items: stretch;
    text-align: center;
    gap: 0;
    padding: var(--space-2) var(--space-3) var(--space-3);
    display: none;
  }

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

  .nav__menu a:not(.btn) {
    padding: 0.875rem 0;
  }

  .nav__menu .btn {
    margin-top: var(--space-2);
  }

  .nav__toggle[aria-expanded="true"] span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .nav__toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }
}

/* ---------- 16. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}