*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: sans-serif;
  background: #f4f6f8;
  color: #1a2a35;
}

/* ── Navbar ── */
.navbar {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0 1.5rem;
  height: 60px;
  background: #1d1d1d;
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  text-decoration: none;
  margin-right: auto;
  line-height: 0;
}

.brand-logo {
  height: 40px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

.nav-links a {
  text-decoration: none;
  color: #333;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color .2s;
}

.nav-links a:hover {
  color: #0055a4;
}

/* ── Language switcher ── */
.lang-switcher {
  display: flex;
  gap: 0.4rem;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  border: 1.5px solid #555;
  border-radius: 4px;
  background: none;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  color: #ccc;
  transition: border-color .2s, color .2s;
}

.lang-btn:hover { border-color: #a8d4d6; color: #a8d4d6; }
.lang-btn.active { border-color: #a8d4d6; color: #a8d4d6; background: rgba(168,212,214,.12); }

.flag {
  width: 22px;
  height: auto;
  border-radius: 2px;
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  height: 2px;
  background: #ccc;
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}

.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Main ── */
main {
  padding: 2rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* ── Designer ── */
.designer {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.designer-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  background: #fff;
  border-radius: 10px;
  padding: 1rem 1.5rem;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}

.control-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
}

.control-group label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: #607080;
}

.stepper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.step-btn {
  width: 32px;
  height: 24px;
  border: 1.5px solid #c0cdd6;
  border-radius: 4px;
  background: #f8fafb;
  cursor: pointer;
  font-size: 0.65rem;
  color: #405060;
  line-height: 1;
  transition: background .15s, border-color .15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-btn:hover  { background: #e4edf4; border-color: #0055a4; color: #0055a4; }
.step-btn:active { background: #ccdaea; }

.step-val {
  font-size: 1.25rem;
  font-weight: 700;
  min-width: 2.5ch;
  text-align: center;
  color: #1a2a35;
  line-height: 1.4;
}

.designer-summary {
  margin-left: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.15rem;
}

.summary-lockers {
  font-size: 1.1rem;
  font-weight: 700;
  color: #0055a4;
}

.summary-dims {
  font-size: 0.8rem;
  color: #607080;
}

.summary-tent {
  font-size: 0.8rem;
  font-weight: 600;
  color: #6a5020;
}

.capacity-warning {
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  background: #fff3cd;
  border: 1px solid #f5c842;
  color: #7a5800;
  font-size: 0.82rem;
  font-weight: 600;
}

.canvas-wrap {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
  overflow: hidden;
  line-height: 0;
}

#locker-canvas {
  display: block;
  width: 100%;
}

.designer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.designer-legend {
  font-size: 0.8rem;
  color: #8090a0;
}

.download-btn {
  padding: 0.45rem 1rem;
  border: 1.5px solid #a8d4d6;
  border-radius: 6px;
  background: none;
  color: #5a9095;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background .2s, color .2s;
}

.download-btn:hover {
  background: #a8d4d6;
  color: #1d1d1d;
}

/* ── Main Layout ── */
.main-layout {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

@media (min-width: 960px) {
  main {
    max-width: 1400px;
  }

  .main-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 2rem;
  }

  .designer {
    flex: 1 1 55%;
    min-width: 0;
    position: sticky;
    top: 76px; /* navbar height + gap */
  }

  .quote-section {
    flex: 1 1 45%;
    min-width: 0;
  }
}

/* ── Quote Form ── */
.quote-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.designer > h2,
.quote-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0;
  color: #1a2a35;
}

.quote-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: #fff;
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 1px 4px rgba(0,0,0,.08);
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

.form-field label {
  font-size: 0.82rem;
  font-weight: 600;
  color: #405060;
}

.form-field input,
.form-field textarea {
  padding: 0.55rem 0.75rem;
  border: 1.5px solid #c0cdd6;
  border-radius: 6px;
  font-size: 0.9rem;
  color: #1a2a35;
  background: #f8fafb;
  transition: border-color .2s;
  font-family: inherit;
}

.form-field select {
  padding: 0.55rem 0.75rem;
  border: 1.5px solid #c0cdd6;
  border-radius: 6px;
  font-size: 0.9rem;
  color: #1a2a35;
  background: #f8fafb;
  transition: border-color .2s;
  font-family: inherit;
  cursor: pointer;
}

.form-field select:focus {
  outline: none;
  border-color: #0055a4;
  background: #fff;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: #0055a4;
  background: #fff;
}

.form-field textarea {
  resize: vertical;
}

.input-dollar {
  position: relative;
  display: flex;
  align-items: center;
}

.dollar-sign {
  position: absolute;
  left: 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: #607080;
  pointer-events: none;
}

.input-dollar input {
  padding-left: 1.6rem;
  width: 100%;
}

.field-error {
  font-size: 0.78rem;
  color: #c0392b;
  background: #fdecea;
  border: 1px solid #e6a19a;
  border-radius: 4px;
  padding: 0.3rem 0.6rem;
  margin-top: 0.2rem;
}

.form-field input.input-invalid,
.form-field.has-error input,
.form-field.has-error textarea {
  border-color: #c0392b;
}

.form-field .field-required-error {
  font-size: 0.78rem;
  color: #c0392b;
  margin-top: 0.2rem;
}

/* Asterisk on required field labels */
.form-field.required label::after {
  content: ' *';
  color: #c0392b;
}


.form-note {
  font-size: 0.8rem;
  color: #8090a0;
  margin-top: 0.25rem;
}

.form-preview-btn,
.form-submit {
  align-self: flex-start;
  padding: 0.65rem 1.5rem;
  border: none;
  border-radius: 6px;
  background: #a8d4d6;
  color: #1d1d1d;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .2s;
}

.form-preview-btn:hover,
.form-submit:hover {
  background: #8cc0c3;
}

.form-submit:disabled {
  background: #ccc;
  color: #888;
  cursor: not-allowed;
}

/* ── Preview Overlay ── */
.form-preview-overlay[hidden] {
  display: none !important;
}

.form-preview-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.form-preview-card {
  position: relative;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,.2);
  padding: 2rem 2rem 1.5rem;
  max-width: 560px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
}

.form-preview-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: #1a2a35;
  padding-right: 2rem;
}

.preview-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  width: 30px;
  height: 30px;
  border: none;
  border-radius: 50%;
  background: #eee;
  color: #333;
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
}

.preview-close:hover {
  background: #ddd;
}

.preview-body {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1rem;
  font-size: 0.88rem;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.preview-body dt {
  font-weight: 600;
  color: #405060;
  white-space: nowrap;
}

.preview-body dd {
  color: #1a2a35;
  word-break: break-word;
}

.preview-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

.preview-back {
  padding: 0.65rem 1.5rem;
  border: 1.5px solid #c0cdd6;
  border-radius: 6px;
  background: #fff;
  color: #405060;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}

.preview-back:hover {
  border-color: #0055a4;
  color: #0055a4;
}

.form-success {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  background: #e6f4ea;
  border: 1px solid #72c084;
  color: #1a5c2a;
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ── Footer ── */
.site-footer {
  text-align: center;
  padding: 1.25rem 1.5rem;
  margin-top: 3rem;
  background: #a8d4d6;
  color: #fff;
  font-size: 0.82rem;
  line-height: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.site-footer p {
  margin: 0;
}

.site-footer .footer-sep {
  opacity: 0.6;
}

/* ── Mobile ── */
@media (max-width: 640px) {
  .hamburger { display: flex; }

  .navbar {
    flex-wrap: wrap;
    height: auto;
    min-height: 60px;
    padding-top: 0;
    padding-bottom: 0;
  }

  .brand { padding: 1rem 0; }

  .nav-menu {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    border-top: 1px solid #333;
  }

  .nav-menu.open { display: flex; }

  .nav-links {
    flex-direction: column;
    gap: 0;
  }

  .nav-links li a {
    display: block;
    padding: 0.75rem 1.5rem;
  }

  .lang-switcher {
    padding: 0.75rem 1.5rem;
    border-top: 1px solid #333;
  }

  .form-row {
    flex-direction: column;
  }
}