/* ============================================
   ShippingBoxFinder — Stylesheet
   Aesthetic: Industrial utilitarian / warehouse
   manifest. Bold condensed type, high contrast,
   grid overlays, functional density.
   Fonts: Barlow Condensed (headers) + Barlow (body)
   Palette: Near-black, kraft brown, safety orange
   ============================================ */

:root {
  --black:        #0e0e0e;
  --ink:          #1a1a1a;
  --ink-2:        #2e2e2e;
  --ink-3:        #6b6b6b;
  --concrete:     #f2f0ed;
  --concrete-2:   #e8e5e0;
  --concrete-3:   #d4d0ca;
  --white:        #fafaf8;
  --kraft:        #c8a96e;
  --kraft-light:  #f5edd9;
  --kraft-dark:   #8b6b3a;
  --orange:       #e8501a;
  --orange-light: #fdeee8;
  --orange-dark:  #c03a0f;
  --green:        #1a6b3a;
  --green-light:  #e8f5ee;
  --border:       #d0ccc5;
  --border-dark:  #999490;
  --shadow:       0 2px 8px rgba(14,14,14,0.12), 0 8px 24px rgba(14,14,14,0.08);
  --radius:       4px; /* sharp corners — industrial */
  --font-display: 'Barlow Condensed', sans-serif;
  --font-body:    'Barlow', sans-serif;
  --max-w:        1160px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ─── HEADER ─────────────────────────────── */
.site-header {
  background: var(--black);
  border-bottom: 3px solid var(--orange);
  position: sticky; top: 0; z-index: 100;
}
.header-inner {
  display: flex; align-items: center;
  justify-content: space-between; height: 54px;
}
.logo {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--white); text-decoration: none;
  display: flex; align-items: center; gap: 8px;
}
.logo strong { color: var(--orange); font-weight: 700; }
.logo-icon { color: var(--orange); font-size: 16px; }
nav { display: flex; gap: 28px; }
nav a {
  font-family: var(--font-display);
  font-size: 14px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: rgba(255,255,255,0.6); text-decoration: none;
  transition: color 0.15s;
}
nav a:hover { color: var(--orange); }

/* ─── HERO ───────────────────────────────── */
.hero {
  background: var(--black);
  padding: 64px 0 56px;
  position: relative; overflow: hidden;
}
.hero-grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 56px; align-items: center;
  position: relative; z-index: 1;
}
.hero-tag {
  font-family: var(--font-display);
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.12em; color: var(--orange);
  border: 1px solid var(--orange);
  display: inline-block;
  padding: 4px 10px; margin-bottom: 20px;
}
h1 {
  font-family: var(--font-display);
  font-size: clamp(52px, 7vw, 88px);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.01em;
  color: var(--white);
  text-transform: uppercase;
  margin-bottom: 22px;
}
.h1-accent { color: var(--orange); }
.hero-sub {
  font-size: 16px; color: rgba(255,255,255,0.55);
  max-width: 480px; line-height: 1.65;
  margin-bottom: 36px;
}
.hero-stats {
  display: flex; align-items: center; gap: 20px;
  flex-wrap: wrap;
}
.stat-item { display: flex; flex-direction: column; }
.stat-n {
  font-family: var(--font-display);
  font-size: 32px; font-weight: 800;
  color: var(--white); line-height: 1;
}
.stat-l { font-size: 11px; color: rgba(255,255,255,0.4); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 2px; }
.stat-sep { font-size: 24px; color: rgba(255,255,255,0.15); font-weight: 300; }

/* 3D Box visual */
.hero-visual { display: flex; justify-content: center; align-items: center; }
.box-diagram { perspective: 400px; }
.box-3d {
  width: 180px; height: 180px;
  transform-style: preserve-3d;
  transform: rotateX(-20deg) rotateY(-35deg);
  animation: boxRotate 12s ease-in-out infinite alternate;
  position: relative;
}
@keyframes boxRotate {
  0%   { transform: rotateX(-20deg) rotateY(-35deg); }
  100% { transform: rotateX(-25deg) rotateY(-25deg); }
}
.face {
  position: absolute;
  border: 1px solid var(--orange);
  background: rgba(232,80,26,0.04);
}
.face.front {
  width: 180px; height: 180px;
  transform: translateZ(90px);
  display: flex; align-items: flex-end; justify-content: flex-end;
  padding: 12px;
  background: rgba(232,80,26,0.06);
}
.face.top {
  width: 180px; height: 180px;
  transform: rotateX(90deg) translateZ(90px);
  background: rgba(232,80,26,0.08);
}
.face.side {
  width: 180px; height: 180px;
  transform: rotateY(-90deg) translateZ(90px);
  display: flex; align-items: center; justify-content: flex-end;
  padding: 12px;
  background: rgba(232,80,26,0.03);
}
.box-label-l, .box-label-w, .box-label-h {
  font-family: var(--font-display);
  font-size: 14px; font-weight: 700;
  color: var(--orange); letter-spacing: 0.08em;
}
.box-label-l { margin-right: 4px; }

/* ─── FINDER SECTION ─────────────────────── */
.finder-section { padding: 64px 0; }
.finder-header { margin-bottom: 28px; }
.finder-header h2 {
  font-family: var(--font-display);
  font-size: 36px; font-weight: 800;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--ink);
  border-bottom: 3px solid var(--orange);
  display: inline-block; padding-bottom: 6px;
  margin-bottom: 8px;
}
.finder-header p { color: var(--ink-3); font-size: 15px; }

.finder-shell {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 0;
  border: 2px solid var(--border-dark);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

/* Input panel */
.input-panel {
  background: var(--concrete);
  border-right: 2px solid var(--border-dark);
  padding: 28px;
}
.panel-label {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.dim-inputs {
  display: flex; align-items: flex-end; gap: 8px;
  margin-bottom: 20px;
}
.dim-field { flex: 1; }
.dim-field label {
  display: block;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--ink-3);
  margin-bottom: 6px;
}
.dim-wrap {
  display: flex; align-items: stretch;
  border: 1.5px solid var(--border-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--white);
  transition: border-color 0.15s;
}
.dim-wrap:focus-within { border-color: var(--orange); }
.dim-wrap input, .dim-wrap select {
  flex: 1; border: none; background: transparent;
  padding: 10px 10px;
  font-family: var(--font-body);
  font-size: 16px; font-weight: 500;
  color: var(--ink); outline: none;
  -moz-appearance: textfield;
  width: 100%;
}
.dim-wrap input::-webkit-inner-spin-button { -webkit-appearance: none; }
.dim-unit {
  padding: 0 8px; background: var(--concrete-2);
  border-left: 1.5px solid var(--border);
  display: flex; align-items: center;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 600;
  color: var(--ink-3); letter-spacing: 0.06em;
  white-space: nowrap;
}
.dim-x {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 700;
  color: var(--border-dark);
  padding-bottom: 10px;
  align-self: flex-end;
}

.options-row { display: flex; flex-direction: column; gap: 14px; margin-bottom: 22px; }
.option-field label:not(.toggle-label) {
  display: block;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--ink-3);
  margin-bottom: 6px;
}
.option-field .dim-wrap select { font-size: 13px; cursor: pointer; }
.option-hint { font-size: 11px; color: var(--ink-3); margin-top: 4px; }

/* Toggle */
.toggle-label {
  display: flex; align-items: center; gap: 10px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 13px; font-weight: 700;
  letter-spacing: 0.06em; color: var(--ink-2);
  text-transform: uppercase;
}
.toggle-label input[type="checkbox"] { display: none; }
.toggle-custom {
  width: 36px; height: 20px;
  background: var(--border);
  border-radius: 10px;
  position: relative; flex-shrink: 0;
  transition: background 0.2s;
}
.toggle-custom::after {
  content: '';
  width: 14px; height: 14px;
  background: white;
  border-radius: 50%;
  position: absolute; top: 3px; left: 3px;
  transition: transform 0.2s;
}
.toggle-label input:checked ~ .toggle-custom { background: var(--orange); }
.toggle-label input:checked ~ .toggle-custom::after { transform: translateX(16px); }

/* Find button */
.find-btn {
  width: 100%; padding: 14px;
  background: var(--orange);
  color: white; border: none;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 18px; font-weight: 800;
  letter-spacing: 0.06em; text-transform: uppercase;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  transition: background 0.15s, transform 0.1s;
  margin-bottom: 10px;
}
.find-btn:hover { background: var(--orange-dark); }
.find-btn:active { transform: scale(0.99); }
.find-btn-icon { font-size: 16px; }

.carrier-toggle-row { text-align: center; }
.carrier-toggle-btn {
  background: none; border: none;
  font-family: var(--font-body);
  font-size: 12px; color: var(--ink-3);
  cursor: pointer; text-decoration: underline;
  transition: color 0.15s;
}
.carrier-toggle-btn:hover { color: var(--orange); }

/* Results panel */
.results-panel {
  background: var(--white);
  padding: 28px;
  min-height: 480px;
  display: flex; flex-direction: column;
}
.results-placeholder {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 12px; color: var(--border);
}
.placeholder-icon { font-size: 48px; }
.results-placeholder p { font-size: 14px; color: var(--border-dark); text-align: center; line-height: 1.5; }

.results-header-bar {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; padding-bottom: 12px;
  border-bottom: 2px solid var(--border);
}
.results-label {
  font-family: var(--font-display);
  font-size: 14px; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--orange);
}
.results-item-size {
  font-family: var(--font-display);
  font-size: 13px; font-weight: 600;
  color: var(--ink-3);
  background: var(--concrete);
  padding: 3px 10px; border-radius: 2px;
}

/* Box result cards */
.box-results { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.box-card {
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  transition: border-color 0.15s;
}
.box-card.best-fit {
  border-color: var(--orange);
  background: var(--orange-light);
}
.box-card:hover { border-color: var(--border-dark); }
.box-card.best-fit:hover { border-color: var(--orange); }
.box-card-top {
  display: flex; align-items: center;
  justify-content: space-between; gap: 12px;
  margin-bottom: 8px;
}
.box-badge {
  font-family: var(--font-display);
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  background: var(--orange); color: white;
  padding: 2px 8px; border-radius: 2px;
}
.box-name {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 800;
  color: var(--ink); letter-spacing: 0.02em;
}
.box-meta {
  display: flex; gap: 16px; align-items: center;
  font-size: 12px; color: var(--ink-3);
}
.box-waste { }
.box-ect {
  background: var(--concrete-2);
  padding: 2px 7px; border-radius: 2px;
  font-family: var(--font-display);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em;
}
.box-use {
  font-size: 12px; color: var(--ink-3);
  margin-bottom: 10px;
}
.box-links {
  display: flex; gap: 8px; flex-wrap: wrap;
}
.box-link {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 12px;
  border: 1.5px solid var(--border-dark);
  border-radius: 2px;
  font-family: var(--font-display);
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-2); text-decoration: none;
  transition: all 0.15s;
}
.box-link:hover { border-color: var(--orange); color: var(--orange); }
.box-link.amazon { border-color: #c8902b; color: #c8902b; }
.box-link.amazon:hover { background: #c8902b; color: white; }

/* DIM weight */
.dim-weight-panel {
  background: var(--concrete);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px; margin-bottom: 16px;
}
.dim-weight-title {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--ink-3);
  text-transform: uppercase; margin-bottom: 8px;
}
.dim-weight-grid {
  display: flex; gap: 24px;
}
.dw-item { display: flex; flex-direction: column; gap: 2px; }
.dw-label { font-size: 11px; color: var(--ink-3); }
.dw-val {
  font-family: var(--font-display);
  font-size: 20px; font-weight: 700; color: var(--ink);
}

/* Carrier boxes */
.carrier-results {
  background: var(--green-light);
  border: 1px solid var(--green);
  border-radius: var(--radius);
  padding: 14px 16px; margin-bottom: 16px;
}
.carrier-header {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--green);
  text-transform: uppercase; margin-bottom: 10px;
}
.carrier-item {
  display: flex; justify-content: space-between;
  font-size: 13px; padding: 5px 0;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  color: var(--ink-2);
}
.carrier-item:last-child { border-bottom: none; }
.carrier-item .ci-carrier {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 600;
  color: var(--green); letter-spacing: 0.06em;
}
.carrier-item .ci-note { font-size: 11px; color: var(--ink-3); }

/* Supplies */
.supplies-panel { }
.supplies-header {
  font-family: var(--font-display);
  font-size: 11px; font-weight: 700;
  letter-spacing: 0.1em; color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 10px; padding-bottom: 8px;
  border-top: 1px solid var(--border); padding-top: 16px;
}
.supplies-grid { display: flex; flex-direction: column; gap: 6px; }
.supply-link {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 2px;
  text-decoration: none; font-size: 13px;
  color: var(--ink-2); transition: all 0.15s;
}
.supply-link:hover { border-color: var(--border-dark); color: var(--ink); }
.supply-link .sl-arrow { color: var(--ink-3); margin-left: auto; font-size: 11px; }

/* ─── HOW IT WORKS ────────────────────────── */
.how-section {
  padding: 64px 0;
  background: var(--black);
}
.section-label {
  font-family: var(--font-display);
  font-size: 13px; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 28px;
  display: flex; align-items: center; gap: 12px;
}
.section-label::after {
  content: ''; flex: 1;
  height: 1px; background: var(--border-dark);
  max-width: 60px;
}
.how-section .section-label { color: var(--orange); }
.how-section .section-label::after { background: rgba(255,255,255,0.1); }
.how-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius); overflow: hidden;
}
.how-step {
  padding: 28px 24px;
  border-right: 1px solid rgba(255,255,255,0.08);
}
.how-step:last-child { border-right: none; }
.step-num {
  font-family: var(--font-display);
  font-size: 48px; font-weight: 800;
  color: var(--orange); opacity: 0.3;
  display: block; line-height: 1;
  margin-bottom: 12px;
}
.how-step h3 {
  font-family: var(--font-display);
  font-size: 16px; font-weight: 700;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--white); margin-bottom: 10px;
}
.how-step p { font-size: 13px; color: rgba(255,255,255,0.5); line-height: 1.65; }

/* ─── MISTAKES ────────────────────────────── */
.mistakes-section {
  padding: 64px 0;
  background: var(--kraft-light);
  border-top: 3px solid var(--kraft);
  border-bottom: 3px solid var(--kraft);
}
.mistakes-section .section-label { color: var(--kraft-dark); }
.mistakes-section .section-label::after { background: var(--kraft); }
.mistakes-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.mistake-card {
  background: var(--white);
  border: 1px solid var(--kraft);
  border-top: 3px solid var(--kraft-dark);
  border-radius: var(--radius);
  padding: 22px 18px;
}
.mistake-num {
  font-family: var(--font-display);
  font-size: 36px; font-weight: 800;
  color: var(--kraft); display: block;
  margin-bottom: 8px; line-height: 1;
}
.mistake-card h3 {
  font-family: var(--font-display);
  font-size: 16px; font-weight: 700;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--ink); margin-bottom: 10px;
}
.mistake-card p { font-size: 13px; color: var(--ink-3); line-height: 1.65; }

/* ─── POPULAR SIZES ───────────────────────── */
.popular-section { padding: 64px 0; }
.section-sub { font-size: 14px; color: var(--ink-3); margin-bottom: 20px; margin-top: -18px; }
.popular-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 10px;
}
.pop-btn {
  background: var(--concrete);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 10px;
  text-align: center; cursor: pointer;
  font-family: var(--font-display);
  font-size: 16px; font-weight: 700;
  color: var(--ink); transition: all 0.15s;
  letter-spacing: 0.02em;
}
.pop-btn:hover {
  border-color: var(--orange);
  background: var(--orange-light);
  color: var(--orange);
}
.pop-btn .pop-sub {
  display: block; font-size: 10px;
  font-weight: 400; color: var(--ink-3);
  margin-top: 3px; letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ─── FAQ ─────────────────────────────────── */
.faq-section {
  padding: 64px 0;
  background: var(--concrete);
  border-top: 1px solid var(--border);
}
.faq-section .section-label { color: var(--ink-2); }
.faq-list { max-width: 740px; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%; text-align: left;
  padding: 18px 0; background: none; border: none;
  font-family: var(--font-body);
  font-size: 15px; font-weight: 500;
  color: var(--ink); cursor: pointer;
  display: flex; justify-content: space-between;
  align-items: center; gap: 12px;
}
.faq-q::after {
  content: '+'; font-size: 22px; color: var(--orange);
  font-family: var(--font-display); font-weight: 700;
  transition: transform 0.2s; flex-shrink: 0;
}
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a { display: none; padding-bottom: 18px; }
.faq-item.open .faq-a { display: block; }
.faq-a p { font-size: 14px; color: var(--ink-3); line-height: 1.75; }
.faq-a ul { font-size: 14px; color: var(--ink-3); line-height: 1.75; padding-left: 20px; margin: 8px 0; }
.faq-a ul li { margin-bottom: 4px; }

/* ─── FOOTER ──────────────────────────────── */
.site-footer {
  background: var(--black);
  padding: 40px 0 28px;
  border-top: 3px solid var(--orange);
}
.footer-inner { display: flex; flex-direction: column; gap: 20px; }
.footer-brand .logo { font-size: 16px; }
.footer-brand p { font-size: 12px; color: rgba(255,255,255,0.3); margin-top: 4px; }
.footer-nav { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-nav a {
  font-family: var(--font-display);
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: rgba(255,255,255,0.4); text-decoration: none;
}
.footer-nav a:hover { color: var(--orange); }
.footer-legal {
  font-size: 11px; color: rgba(255,255,255,0.2);
  line-height: 1.65; max-width: 700px;
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 20px;
}

/* ─── RESPONSIVE ──────────────────────────── */
@media (max-width: 960px) {
  .finder-shell { grid-template-columns: 1fr; }
  .input-panel { border-right: none; border-bottom: 2px solid var(--border-dark); }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .how-grid { grid-template-columns: 1fr 1fr; }
  .how-step { border-bottom: 1px solid rgba(255,255,255,0.08); }
  .mistakes-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .dim-inputs { flex-wrap: wrap; }
  .dim-x { display: none; }
  .how-grid { grid-template-columns: 1fr; }
  .mistakes-grid { grid-template-columns: 1fr; }
  nav a:not(:first-child) { display: none; }
  .hero-stats { gap: 16px; }
}