/* Corporate colours
#FD9803 Vivid orange
#112656 Very dark blue
*/

* {
  box-sizing: border-box;
}

:root {
  --brand-main: #112656;
  --brand-accent: #fd9803;
  --page-bg: #f4f6fb;
  --panel-bg: #ffffff;
  --text-main: #112656;
  --text-soft: #5b6473;
  --border: #d7ddea;
  --shadow: 0 12px 30px rgba(17, 38, 86, 0.08);
  --radius: 18px;
  --disabled-bg: #eef1f6;
  --disabled-text: #98a1b2;
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: system-ui, sans-serif;
  background: linear-gradient(135deg, #eef2fb 0%, #f8fafc 100%);
  color: var(--text-main);
}

body {
  min-height: 100vh;
}

.page-shell {
  min-height: 100vh;
  padding: 1.25rem;
  max-width: 1600px;
  margin: 0 auto;
}

/* Header */
.page-header {
  margin-bottom: 1.25rem;
}

.branding {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.85rem;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.logo {
  width: 96px;
  height: 96px;
  object-fit: contain;
  display: block;
  background: #ffffff;
  border-radius: 16px;
  padding: 0.5rem;
  box-shadow: var(--shadow);
}

.branding-text h1 {
  margin: 0;
  font-size: 2.2rem;
  line-height: 1.1;
  color: var(--brand-main);
}

.branding-text p {
  margin: 0.45rem 0 0;
  color: var(--text-soft);
  font-size: 1.05rem;
}

/* 3-panel layout */
.panel-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.3fr 1fr;
  gap: 1.25rem;
  align-items: start;
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.panel-preview {
  text-align: center;
}

/* Typography */
h2 {
  margin-top: 0;
  margin-bottom: 1rem;
  color: var(--brand-main);
}

p {
  margin-top: 0;
}

ol {
  margin: 0;
  padding-left: 1.25rem;
  line-height: 1.7;
}

/* Form layout */
#qr-form {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.dynamic-fields {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.form-row label,
.option-group legend {
  font-weight: 700;
  color: var(--brand-main);
}

.form-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  align-items: center;
  gap: 0.75rem;
}

.form-row label {
  margin: 0;
}

.compact-form-row {
  grid-template-columns: 120px 1fr;
}

.dual-option-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.9rem;
  align-items: start;
}

select,
input[type="url"],
input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  color: var(--text-main);
  font: inherit;
}

textarea {
  resize: vertical;
  min-height: 90px;
}

input[type="color"] {
  width: 56px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #ffffff;
  cursor: pointer;
}

input[type="range"] {
  width: 100%;
}

input[type="radio"],
input[type="checkbox"] {
  accent-color: var(--brand-main);
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 14px;
  min-width: 0;
}

.compact-group {
  height: 100%;
}

.radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 400;
  color: var(--text-main);
}

.checkbox-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.checkbox-row label {
  font-weight: 700;
}

.colour-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.colour-input-wrap input[type="text"] {
  flex: 1;
  max-width: 110px;
  text-transform: uppercase;
}

/* Logo controls */
.logo-controls-row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 0.75rem;
  align-items: center;
}

.toggle-button {
  border: 1px solid var(--brand-main);
  background: transparent;
  color: var(--brand-main);
  border-radius: 14px;
  padding: 0.85rem 1rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.toggle-button.is-active {
  background: linear-gradient(135deg, var(--brand-main), var(--brand-accent));
  color: #ffffff;
  border-color: transparent;
  box-shadow: var(--shadow);
}

.toggle-button:hover {
  transform: translateY(-1px);
}

.upload-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}

.upload-control input[type="file"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 1px;
  height: 1px;
}

.file-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 130px;
  padding: 0.85rem 1rem;
  border: 1px solid var(--brand-main);
  border-radius: 14px;
  background: #ffffff;
  color: var(--brand-main);
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}

.file-name {
  color: var(--text-soft);
  font-size: 0.95rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.upload-control.is-disabled .file-button {
  background: var(--disabled-bg);
  border-color: var(--border);
  color: var(--disabled-text);
  cursor: not-allowed;
}

.upload-control.is-disabled .file-name {
  color: var(--disabled-text);
}

/* Preview area */
.preview-note,
.qr-data-preview {
  color: var(--text-soft);
}

.preview-note {
  margin-bottom: 1rem;
}

.qr-preview {
  width: 100%;
  min-height: 340px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.qr-preview canvas,
.qr-preview svg {
  max-width: 100%;
  height: auto;
}

.qr-data-preview {
  margin-top: 1rem;
  margin-bottom: 0;
  word-break: break-word;
}

/* Buttons */
.download-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.25rem;
}

.primary-button,
.secondary-button {
  border-radius: 14px;
  padding: 0.9rem 1.35rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.primary-button {
  border: none;
  background: linear-gradient(135deg, var(--brand-main), var(--brand-accent));
  color: #ffffff;
  box-shadow: var(--shadow);
}

.secondary-button {
  border: 1px solid var(--brand-main);
  background: transparent;
  color: var(--brand-main);
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

input.is-disabled {
  background: var(--disabled-bg);
  color: var(--disabled-text);
  border-color: var(--border);
  cursor: not-allowed;
}

/* Links */
a {
  color: var(--brand-accent);
  font-weight: 700;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Tablet */
@media (max-width: 1180px) {
  .panel-grid {
    grid-template-columns: 1fr 1fr;
  }

  .panel-instructions {
    grid-column: 1 / 2;
  }

  .panel-options {
    grid-column: 2 / 3;
  }

  .panel-preview {
    grid-column: 1 / 3;
  }

  .dual-option-row {
    grid-template-columns: 1fr;
  }
}

/* Mobile */
@media (max-width: 700px) {
  .page-shell {
    padding: 1rem;
  }

  .panel-grid {
    grid-template-columns: 1fr;
  }

  .panel-instructions,
  .panel-options,
  .panel-preview {
    grid-column: auto;
  }

  .panel {
    padding: 1.1rem;
  }

  .logo {
    width: 76px;
    height: 76px;
  }

  .branding-text h1 {
    font-size: 1.8rem;
  }

  .form-row,
  .compact-form-row,
  .logo-controls-row {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .dual-option-row,
  .radio-group,
  .colour-input-wrap,
  .download-row,
  .upload-control {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .checkbox-row {
    align-items: flex-start;
  }

  .file-name {
    white-space: normal;
  }

  .qr-preview {
    min-height: 280px;
    padding: 0.5rem;
  }
}