/* ============================================================================
   Tideway Cargo Logistics — styles.css
   Foundation + Header/Nav + Hero (first build pass)

   Structure of this file:
     1. Design tokens (CSS variables)
     2. Reset & base
     3. Layout helpers (container)
     4. Typography helpers
     5. Buttons
     6. Header / Nav
     7. Hero
     8. Responsive (media queries)
   ============================================================================ */

/* ----------------------------------------------------------------------------
   1. DESIGN TOKENS
   CSS custom properties (variables). Change a value here and it updates
   everywhere it's used. All colors are sampled from the brand presentation.
---------------------------------------------------------------------------- */
:root {
  /* Brand colors */
  --navy:           #0D2A42;  /* primary background */
  --navy-deep:      #0A2236;  /* darker sections / footer */
  --navy-surface:   #213C52;  /* cards / raised panels */
  --navy-surface-2: #2C455A;  /* hover / borders */
  --teal:           #04BF9B;  /* primary accent */
  --mint:           #00FFC1;  /* gradient highlight / glow */
  --white:          #FFFFFF;
  --text-muted:     #AEBECB;  /* secondary body text on navy */

  /* The signature teal→mint gradient */
  --gradient-teal: linear-gradient(135deg, var(--teal) 0%, var(--mint) 100%);

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

  /* Layout */
  --container-max: 1200px;
  --container-pad: clamp(1.25rem, 5vw, 4rem);
  --section-pad:   clamp(4rem, 9vw, 7rem);

  /* Misc */
  --radius:     14px;
  --radius-sm:  10px;
  --header-h:   92px;
  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --shadow:     0 20px 50px -20px rgba(0, 0, 0, 0.55);
}

/* ----------------------------------------------------------------------------
   2. RESET & BASE
---------------------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  scroll-behavior: smooth;          /* native smooth scroll for anchor links */
  scroll-padding-top: var(--header-h); /* stop anchors hiding under the header */
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--navy);
  color: var(--white);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;               /* prevent sideways scroll from decorations */
}

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

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

/* Accessible focus ring for keyboard users */
:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
  border-radius: 4px;
}

/* Respect users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* ----------------------------------------------------------------------------
   3. LAYOUT HELPER — .container centers content and adds side padding
---------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ----------------------------------------------------------------------------
   4. TYPOGRAPHY HELPERS
---------------------------------------------------------------------------- */
/* The small uppercase label that sits above headings */
.eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mint);
}

/* A small teal chevron used as a decorative bullet ">" */
.chev { color: var(--teal); font-weight: 700; }

/* ----------------------------------------------------------------------------
   5. BUTTONS
---------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.6rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  border: 1.5px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease),
              background-color 0.2s var(--ease), color 0.2s var(--ease);
}
.btn--sm { padding: 0.6rem 1.1rem; font-size: 0.9rem; }

/* Primary = teal→mint gradient pill, dark text for contrast */
.btn--primary {
  background-image: var(--gradient-teal);
  color: var(--navy-deep);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px -8px rgba(0, 255, 193, 0.5);
}

/* Ghost = outlined, fills on hover */
.btn--ghost {
  border-color: rgba(255, 255, 255, 0.35);
  color: var(--white);
  background: transparent;
}
.btn--ghost:hover {
  border-color: var(--mint);
  color: var(--mint);
  transform: translateY(-2px);
}

/* ----------------------------------------------------------------------------
   6. HEADER / NAV
---------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;            /* top:0; left:0; right:0 */
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  /* Transparent over the hero; a subtle gradient keeps the logo readable */
  background: linear-gradient(to bottom, rgba(10, 34, 54, 0.55), transparent);
  transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
/* JS adds this class after you scroll a little */
.site-header.is-scrolled {
  background: rgba(10, 34, 54, 0.92);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.06), 0 8px 30px -12px rgba(0,0,0,0.6);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: 100%;
}

.site-header__logo img { height: 60px; width: auto; }

/* Desktop nav links */
.site-nav__list {
  list-style: none;
  padding: 0;
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.2vw, 2rem);
}
.site-nav__list a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.2s var(--ease);
  position: relative;
}
.site-nav__list a:hover,
.site-nav__list a.is-active { color: var(--white); }

/* The "Contact" CTA is a button, not a plain link — keep its dark navy text
   readable on the teal gradient (override the muted nav-link color above).
   The extra selector depth (.site-nav__list .site-nav__cta a) makes sure this
   wins on specificity in both the normal and hover states. */
.site-nav__list .site-nav__cta a,
.site-nav__list .site-nav__cta a:hover,
.site-nav__list .site-nav__cta a.is-active { color: var(--navy-deep); }

/* Animated underline for the active/hovered link (not on the CTA button) */
.site-nav__list li:not(.site-nav__cta) a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%;
  height: 2px;
  background-image: var(--gradient-teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease);
}
.site-nav__list li:not(.site-nav__cta) a:hover::after,
.site-nav__list li:not(.site-nav__cta) a.is-active::after { transform: scaleX(1); }

/* Hamburger button — hidden on desktop, shown on mobile */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 110;
}
.nav-toggle__bar {
  display: block;
  width: 26px; height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
/* Hamburger morphs into an "X" when the menu is open */
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ----------------------------------------------------------------------------
   7. HERO
---------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;            /* better mobile sizing where supported */
  display: flex;
  align-items: center;
  background:
    radial-gradient(120% 90% at 80% 10%, #11354f 0%, var(--navy) 55%) ,
    var(--navy);
  overflow: hidden;
  padding-top: var(--header-h);
}

.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding-block: clamp(3rem, 8vw, 6rem);
}

.hero__eyebrow {
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--mint);
  margin-bottom: 1.25rem;
}
.hero__eyebrow .chev { margin-right: 0.35rem; }

.hero__title {
  font-size: clamp(2.25rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}
/* Second line of the headline rendered in the teal→mint gradient */
.hero__title-accent {
  display: block;
  background-image: var(--gradient-teal);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--text-muted);
  max-width: 56ch;
  margin-bottom: 2.25rem;
}

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

/* Decorative chevrons on the right (pure CSS, mirrors the PDF cover).
   Each chevron is a square rotated/clipped into a ">" outline. */
.hero__chevrons {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
.hero__chevron {
  position: absolute;
  top: 50%;
  right: -6%;
  width: clamp(280px, 42vw, 620px);
  aspect-ratio: 1;
  transform: translateY(-50%);
  /* clip-path draws an outlined ">" shape */
  clip-path: polygon(
    0 0, 28% 0, 100% 50%, 28% 100%, 0 100%, 72% 50%
  );
}
.hero__chevron--1 { right: -4%;  background: rgba(255,255,255,0.025); }
.hero__chevron--2 { right: 6%;   width: clamp(220px, 34vw, 500px); background: rgba(255,255,255,0.03); }
.hero__chevron--3 { right: 16%;  width: clamp(160px, 26vw, 380px);
  background: var(--gradient-teal); opacity: 0.10; }

/* Scroll hint at the bottom-center */
.hero__scroll {
  position: absolute;
  left: 50%; bottom: 2rem;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.hero__scroll-arrow {
  width: 1px; height: 34px;
  background: linear-gradient(to bottom, var(--mint), transparent);
  animation: scrollPulse 1.8s var(--ease) infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); transform-origin: top; }
  50%      { opacity: 1;   transform: scaleY(1);   transform-origin: top; }
}

/* Teal→mint strip along the very bottom of the hero (matches cover) */
.hero__strip {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 6px;
  background-image: var(--gradient-teal);
  z-index: 3;
}

/* ----------------------------------------------------------------------------
   8. RESPONSIVE
---------------------------------------------------------------------------- */

/* --- Tablet & below: show hamburger, hide desktop nav --- */
@media (max-width: 1024px) {
  .nav-toggle { display: flex; }

  /* The nav becomes a full-screen navy overlay, slid in from the right.
     It's hidden by default (translated off-screen) and shown when the
     <body> has the .nav-open class (added by JS). */
  .site-nav {
    position: fixed;
    inset: 0;
    background: var(--navy-deep);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
    visibility: hidden;
  }
  .site-nav__list {
    flex-direction: column;
    gap: 1.75rem;
    text-align: center;
  }
  .site-nav__list a { font-size: 1.35rem; }

  /* When open */
  body.nav-open .site-nav { transform: translateX(0); visibility: visible; }
  body.nav-open { overflow: hidden; }   /* lock background scroll */
}

/* --- Phones --- */
@media (max-width: 768px) {
  :root { --header-h: 76px; }
  .site-header__logo img { height: 48px; }
  .hero__chevron--1, .hero__chevron--2 { opacity: 0.6; }
  .hero__actions .btn { flex: 1 1 auto; }  /* full-width-ish buttons */
}

/* ============================================================================
   9. SECTIONS (shared)
   ============================================================================ */
.section {
  position: relative;
  padding-block: var(--section-pad);
}
/* Alternating slightly-darker band to separate sections */
.section--alt { background: var(--navy-deep); }

/* Section heading block (centered intro) */
.section__head {
  max-width: 760px;
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
}
.section__head .eyebrow { margin-bottom: 0.75rem; }

.section__title {
  font-size: clamp(1.75rem, 3.4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.section__title--xl { font-size: clamp(2rem, 4.5vw, 3.25rem); }
.eyebrow + .section__title { margin-top: 0.75rem; }

.section__lead { font-size: 1.125rem; color: var(--text-muted); max-width: 60ch; }

/* Body paragraphs inside sections */
.section p { margin-bottom: 1rem; max-width: 60ch; }
.text-muted { color: var(--text-muted); }

/* ============================================================================
   10. SPLIT LAYOUT (image + text, two columns)
   ============================================================================ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
}
/* For reversed rows we just rely on source order; on mobile everything stacks. */

/* Chevron-masked image frame — the signature ">" cut on one edge */
.chevron-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  /* Cut the right edge into a chevron point */
  clip-path: polygon(0 0, 100% 0, 88% 50%, 100% 100%, 0 100%);
}
.chevron-frame--left {
  /* Cut the left edge instead */
  clip-path: polygon(12% 0, 100% 0, 100% 100%, 12% 100%, 0 50%);
}
.chevron-frame img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 3 / 2; }
/* Teal gradient edge accent behind the frame */
.chevron-frame::after {
  content: "";
  position: absolute; inset: 0;
  background: var(--gradient-teal);
  opacity: 0.12; mix-blend-mode: screen;
  pointer-events: none;
}

/* ============================================================================
   11. CHEVRON BULLET LIST
   ============================================================================ */
.chev-list { list-style: none; padding: 0; margin: 1.5rem 0; display: grid; gap: 0.9rem; }
.chev-list li {
  position: relative;
  padding-left: 1.75rem;
  color: var(--white);
  max-width: 56ch;
}
.chev-list li::before {
  content: "\203A";                 /* the › chevron */
  position: absolute; left: 0; top: -0.05em;
  color: var(--teal);
  font-weight: 700; font-size: 1.25rem;
}
.chev-list strong { font-weight: 600; }

/* ============================================================================
   12. SERVICES — CARD GRID
   ============================================================================ */
.section--services { background: var(--navy-deep); }
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2.2vw, 1.75rem);
}
.card {
  background: var(--navy-surface);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease),
              box-shadow 0.25s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(0,255,193,0.35);
  box-shadow: 0 18px 40px -22px rgba(0,255,193,0.45);
}
.card__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 52px; height: 52px;
  margin-bottom: 1.25rem;
  border-radius: 12px;
  font-size: 1.5rem;
  color: var(--navy-deep);
  background-image: var(--gradient-teal);
}
.card__title { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.6rem; }
.card p { color: var(--text-muted); margin: 0; font-size: 0.975rem; }

/* ============================================================================
   13. WHY — VALUE LIST (numbered)
   ============================================================================ */
.value-list {
  list-style: none; padding: 0; margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1.5rem, 3vw, 2.5rem);
}
.value { display: flex; gap: 1.25rem; align-items: flex-start; }
.value__num {
  flex: none;
  font-size: 1.5rem; font-weight: 800; line-height: 1;
  background-image: var(--gradient-teal);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.value__title { font-size: 1.15rem; font-weight: 600; margin-bottom: 0.4rem; }
.value p { color: var(--text-muted); margin: 0; }

/* ============================================================================
   14. PULL-QUOTE
   ============================================================================ */
.quote {
  position: relative;
  margin: clamp(2.5rem, 5vw, 4rem) auto 0;
  max-width: 880px;
  padding: clamp(2rem, 4vw, 3rem) clamp(1.75rem, 4vw, 3.5rem);
  border-radius: var(--radius);
  background: var(--navy-surface);
  border-left: 4px solid transparent;
  border-image: var(--gradient-teal) 1;
}
.quote p {
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  font-weight: 500; line-height: 1.4;
  margin: 0; max-width: none;
}
.quote::before {
  content: "\201C";
  position: absolute; top: -0.3em; left: 0.4rem;
  font-size: 5rem; line-height: 1;
  color: var(--teal); opacity: 0.25;
}

/* ============================================================================
   15. SUSTAINABILITY — COMMITMENTS
   ============================================================================ */
.commitments { margin: 1.5rem 0 0; display: grid; gap: 1.1rem; }
.commitment dt {
  font-weight: 600; color: var(--white);
  position: relative; padding-left: 1.75rem; margin-bottom: 0.15rem;
}
.commitment dt::before {
  content: "\203A"; position: absolute; left: 0; top: -0.05em;
  color: var(--teal); font-weight: 700; font-size: 1.25rem;
}
.commitment dd { margin: 0 0 0 1.75rem; color: var(--text-muted); font-size: 0.975rem; }

/* ============================================================================
   16. DRONE — STAT CALLOUTS
   ============================================================================ */
.stats { display: flex; flex-wrap: wrap; gap: 1.5rem; margin: 1.75rem 0; }
.stat {
  flex: 1 1 200px;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-sm);
  background: var(--navy-surface);
  border: 1px solid rgba(0,255,193,0.18);
}
.stat__num {
  display: block;
  font-size: 2rem; font-weight: 800; line-height: 1;
  background-image: var(--gradient-teal);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 0.4rem;
}
.stat__label { font-size: 0.9rem; color: var(--text-muted); }

/* ============================================================================
   17. CONTACT
   ============================================================================ */
.section--contact { background: var(--navy-deep); overflow: hidden; }
.contact {
  position: relative; z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}
.contact__intro p { color: var(--text-muted); }
.contact__details { list-style: none; padding: 0; margin: 2rem 0 0; display: grid; gap: 1.25rem; }
.contact__details li { line-height: 1.4; }
.contact__details a:hover { color: var(--mint); }
.contact__label {
  display: block;
  font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--teal);
  margin-bottom: 0.25rem;
}

/* Form */
.contact-form {
  background: var(--navy-surface);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: clamp(1.5rem, 3vw, 2.25rem);
}
.field { margin-bottom: 1.1rem; }
.field label {
  display: block; font-size: 0.875rem; font-weight: 500;
  margin-bottom: 0.4rem; color: var(--text-muted);
}
.field input, .field textarea {
  width: 100%;
  font-family: inherit; font-size: 1rem; color: var(--white);
  background: var(--navy-deep);
  border: 1.5px solid var(--navy-surface-2);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  transition: border-color 0.2s var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: #6c7e8d; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--mint); }
.field textarea { resize: vertical; min-height: 110px; }
/* Highlight invalid fields after a failed submit attempt (JS adds .invalid) */
.field.invalid input, .field.invalid textarea { border-color: #ff6b6b; }
.contact-form__submit { width: 100%; margin-top: 0.5rem; }
.contact-form__status { margin: 1rem 0 0; font-size: 0.95rem; min-height: 1.2em; }
.contact-form__status.is-success { color: var(--mint); }
.contact-form__status.is-error { color: #ff8585; }

/* ============================================================================
   18. FOOTER
   ============================================================================ */
.site-footer { background: #07182a; padding-top: clamp(3rem, 6vw, 4.5rem); }
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}
.site-footer__brand img { height: 64px; margin-bottom: 1rem; }
.site-footer__brand p { color: var(--text-muted); font-size: 0.95rem; max-width: 40ch; }
.site-footer__nav { display: flex; flex-direction: column; gap: 0.7rem; }
.site-footer__nav a { color: var(--text-muted); font-size: 0.95rem; }
.site-footer__nav a:hover { color: var(--mint); }
.site-footer__contact p { color: var(--text-muted); font-size: 0.95rem; margin: 0 0 0.5rem; }
.site-footer__contact a:hover { color: var(--mint); }
.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-block: 1.5rem;
}
.site-footer__bottom p { color: #6c7e8d; font-size: 0.875rem; margin: 0; }

/* ============================================================================
   19. REVEAL-ON-SCROLL ANIMATION
   Elements with .reveal start faded/below; JS adds .is-visible to animate in.
   ============================================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  will-change: opacity, transform;
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================================
   20. RESPONSIVE — SECTIONS
   ============================================================================ */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  /* Stack split layouts; image always sits above text for reading order */
  .split { grid-template-columns: 1fr; }
  .split--reverse .split__media { order: -1; }
  .value-list { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
  .chevron-frame, .chevron-frame--left {
    /* Simpler straight edges look better when full-width on mobile */
    clip-path: none;
  }
  .site-footer__inner { grid-template-columns: 1fr; gap: 2rem; }
}
@media (max-width: 600px) {
  .cards { grid-template-columns: 1fr; }
}