/* ==========================================================================
   Venova Energy — Base styles, reset, and core components
   ========================================================================== */

*, *::before, *::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; overflow-x:hidden; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *, *::before, *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}

body{
  margin:0;
  font-family:var(--font-body);
  font-size:var(--fs-md);
  line-height:var(--lh-normal);
  color:var(--text-primary);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  /* Safety net against sub-pixel rounding in nested grid/flex gaps at narrow
     widths (e.g. 360px) producing a stray 1-2px horizontal scrollbar —
     nothing in the layout actually needs to scroll sideways. */
  overflow-x:hidden;
}

img, svg{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font:inherit; cursor:pointer; }
ul, ol{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,p{ margin:0; }

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:var(--fw-semibold);
  line-height:var(--lh-tight);
  color:var(--text-primary);
  letter-spacing:-.01em;
}

h1{ font-size:var(--fs-6xl); }
h2{ font-size:var(--fs-4xl); }
h3{ font-size:var(--fs-2xl); }
h4{ font-size:var(--fs-xl); }

p{ color:var(--text-secondary); }
p.lead{ font-size:var(--fs-lg); color:var(--text-secondary); line-height:var(--lh-relaxed); }

.on-dark h1,.on-dark h2,.on-dark h3,.on-dark h4{ color:var(--text-on-dark); }
.on-dark p{ color:var(--text-on-dark-muted); }

/* ---------- Layout helpers ---------- */
.container{
  max-width:var(--container-max);
  margin-inline:auto;
  padding-inline:var(--container-pad);
}
.section{ padding-block:var(--sp-24); }
.section-tight{ padding-block:var(--sp-16); }
/* The header is position:fixed (~70px tall), so any in-page anchor jump —
   nav links, "Open the full Backup Calculator", browser back/forward with a
   #hash, a direct load to a #section URL — lands content right under it
   without this. Applies site-wide to every anchorable section. */
section[id]{ scroll-margin-top:100px; }
.stack{ display:flex; flex-direction:column; }
.row{ display:flex; align-items:center; }
.grid-2{ display:grid; grid-template-columns:1fr 1fr; gap:var(--sp-8); }
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:var(--sp-6); }
.grid-5{ display:grid; grid-template-columns:repeat(5,1fr); gap:var(--sp-4); }
@media (max-width:900px){
  .grid-2{ grid-template-columns:1fr; }
  .grid-3{ grid-template-columns:1fr 1fr; }
  .grid-5{ grid-template-columns:repeat(3,1fr); }
}
@media (max-width:560px){
  .grid-3{ grid-template-columns:1fr; }
  .grid-5{ grid-template-columns:repeat(2,1fr); }
}

.eyebrow{
  display:inline-flex; align-items:center; gap:var(--sp-2);
  font-family:var(--font-body);
  font-size:var(--fs-2xs);
  font-weight:var(--fw-semibold);
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--green-600);
}
.on-dark .eyebrow{ color:var(--green-300); }
.eyebrow::before{
  content:"";
  width:18px; height:2px;
  background:var(--grad-brand);
  border-radius:2px;
}

.section-head{ max-width:640px; margin-bottom:var(--sp-12); }
.section-head.center{ margin-inline:auto; text-align:center; }
.section-head h2{ margin-top:var(--sp-3); }
.section-head p{ margin-top:var(--sp-4); font-size:var(--fs-lg); }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:var(--sp-2);
  padding:.9rem 1.6rem;
  border-radius:var(--radius-full);
  font-family:var(--font-body);
  font-weight:var(--fw-semibold);
  font-size:var(--fs-sm);
  border:1px solid transparent;
  transition:transform var(--dur-fast) var(--ease-out),
             box-shadow var(--dur-fast) var(--ease-out),
             background var(--dur-fast) var(--ease-out),
             border-color var(--dur-fast) var(--ease-out),
             color var(--dur-fast) var(--ease-out);
  white-space:nowrap;
}
.btn:active{ transform:translateY(1px); }

.btn-primary{
  background:var(--grad-brand);
  color:#fff;
  box-shadow:var(--shadow-glow-green);
}
.btn-primary:hover{ transform:translateY(-2px); box-shadow:0 16px 36px -10px rgba(14,154,72,.45); }

.btn-secondary{
  background:transparent;
  color:var(--navy-800);
  border-color:var(--slate-300);
}
.btn-secondary:hover{ border-color:var(--navy-800); background:var(--slate-100); }
.on-dark .btn-secondary{ color:#fff; border-color:rgba(255,255,255,.28); }
.on-dark .btn-secondary:hover{ background:rgba(255,255,255,.08); border-color:#fff; }

.btn-ghost{
  background:transparent; color:var(--navy-800);
  padding:.6rem .25rem;
  border-radius:0;
  position:relative;
}
.btn-ghost::after{
  content:"→";
  transition:transform var(--dur-fast) var(--ease-out);
}
.btn-ghost:hover::after{ transform:translateX(4px); }
.on-dark .btn-ghost{ color:#fff; }

.btn-sm{ padding:.6rem 1.1rem; font-size:var(--fs-xs); }
.btn-lg{ padding:1.1rem 2rem; font-size:var(--fs-md); }
.btn-block{ width:100%; }

.btn-whatsapp{
  background:#1FA855; color:#fff;
}
.btn-whatsapp:hover{ transform:translateY(-2px); box-shadow:0 16px 32px -12px rgba(31,168,85,.5); }

/* ---------- Cards ---------- */
.card{
  background:var(--white);
  border:1px solid var(--border-default);
  border-radius:var(--radius-lg);
  padding:var(--sp-8);
  transition:transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:transparent; }

.card-icon{
  width:52px; height:52px;
  border-radius:var(--radius-md);
  background:var(--green-100);
  color:var(--green-600);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:var(--sp-5);
}
.card-icon svg{ width:24px; height:24px; }

.card-dark{
  background:linear-gradient(160deg, rgba(255,255,255,.06), rgba(255,255,255,.02));
  border:1px solid var(--border-dark);
  backdrop-filter:blur(6px);
}
.card-dark .card-icon{ background:rgba(79,203,121,.14); color:var(--green-300); }

/* ---------- Badge / pill ---------- */
.badge{
  display:inline-flex; align-items:center; gap:var(--sp-2);
  padding:.4rem .85rem;
  border-radius:var(--radius-full);
  font-size:var(--fs-2xs);
  font-weight:var(--fw-semibold);
  letter-spacing:.04em;
  background:var(--slate-100); color:var(--slate-700);
}
.badge-brand{ background:var(--green-100); color:var(--green-700); }
.badge-green{ background:var(--grad-brand); color:#fff; }
.badge-dot{ width:6px; height:6px; border-radius:50%; background:currentColor; }

/* ---------- Forms ---------- */
.field{ display:flex; flex-direction:column; gap:var(--sp-2); margin-bottom:var(--sp-5); }
.field label{ font-size:var(--fs-xs); font-weight:var(--fw-semibold); color:var(--text-secondary); }
.field input, .field select, .field textarea{
  font-family:var(--font-body);
  font-size:var(--fs-sm);
  padding:.85rem 1rem;
  border-radius:var(--radius-sm);
  border:1.5px solid var(--slate-200);
  background:var(--white);
  color:var(--text-primary);
  transition:border-color var(--dur-fast), box-shadow var(--dur-fast);
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none; border-color:var(--green-500);
  box-shadow:0 0 0 4px rgba(14,154,72,.12);
}
.field .hint{ font-size:var(--fs-2xs); color:var(--text-muted); }
.field .error{ font-size:var(--fs-2xs); color:var(--color-danger); display:none; }
.field.invalid input, .field.invalid select, .field.invalid textarea{ border-color:var(--color-danger); }
.field.invalid .error{ display:block; }

/* ---------- Divider / rule ---------- */
.rule{ height:1px; background:var(--border-default); border:none; margin:0; }

/* ---------- Utility ---------- */
.text-center{ text-align:center; }
.muted{ color:var(--text-muted); }
.mt-0{margin-top:0;} .mt-2{margin-top:var(--sp-2);} .mt-4{margin-top:var(--sp-4);}
.mt-6{margin-top:var(--sp-6);} .mt-8{margin-top:var(--sp-8);} .mt-12{margin-top:var(--sp-12);}
.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}
/* Standard accessibility skip-link pattern: stays in normal horizontal flow
   (left:0) and is moved fully off-screen ABOVE the viewport via transform,
   rather than pushed thousands of pixels sideways. That old left:-9999px
   technique can make some non-Chromium browsers jump-scroll the page
   horizontally the instant the link receives keyboard focus (before the
   :focus style even applies), and it is one more absolutely-positioned
   element parked at an extreme offset that can confuse a page's measured
   scroll width. transform keeps it clipped by the viewport's natural top
   edge, takes no layout space at rest, and reveals with a quick, contained
   slide instead of a jarring cross-page jump. */
.skip-link{
  position:absolute; top:0; left:0; z-index:1000;
  background:var(--navy-800); color:#fff;
  padding:.75rem 1.25rem; border-radius:0 0 8px 0;
  transform:translateY(-100%);
  transition:transform 150ms ease-out;
}
.skip-link:focus{ transform:translateY(0); }
@media (prefers-reduced-motion: reduce){
  .skip-link{ transition:none; }
}