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

button,
input {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
  margin: 0;
  padding: 0;
  border: none;
}

button {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 2px;
}

:root {
  --color-red: #e2000f;
  --color-black: #1a1a18;
  --color-white: #ffffff;
  --color-blue: #1f5473;
  --color-primary: #1e5a8a;
  --color-disabled: #666666;
  --color-light-grey: #e1e1e1;
  --color-green: #00970d;
  --border-color: #d8e0e8;
  --text-secondary: #5c6b7a;
  --page-container-max-width: 920px;
  --radius-card: 16px;
  --radius-button: 10px;

  color: var(--color-black);
  background-color: #f5f5f5;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
}

body {
  margin: 0;
  min-height: 100vh;
}

.page {
  min-height: 100vh;
  padding: 48px 16px 32px;
}

.page-container {
  width: 100%;
  max-width: var(--page-container-max-width);
  margin-left: auto;
  margin-right: auto;
}

.page-container--surface {
  background: var(--color-white);
  border: 1px solid var(--color-light-grey);
  border-radius: var(--radius-card);
  padding: 28px 24px 24px;
  box-shadow: 0 8px 24px rgba(30, 90, 138, 0.08);
}

.qr-tool__header {
  margin-bottom: 24px;
}

.qr-tool__eyebrow {
  margin: 0 0 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.qr-tool__title {
  margin: 0 0 12px;
  font-size: 1.75rem;
  font-weight: 700;
  color: #1a2332;
}

.qr-tool__description {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.qr-tool__layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  align-items: start;
}

.qr-tool__form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.qr-tool__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1a2332;
}

.qr-tool__input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  background: #f8fafc;
  font-size: 0.9375rem;
  color: #0f172a;
}

.qr-tool__status {
  margin: 0;
  font-size: 0.875rem;
}

.qr-tool__status.is-error {
  color: var(--color-red);
}

.qr-tool__status.is-success {
  color: var(--color-green);
}

.qr-tool__logo-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.qr-tool__helper {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  line-height: 1.45;
}

.qr-tool__file-control {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 48px;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  background: #f8fafc;
}

.qr-tool__file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.qr-tool__file-trigger {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 14px;
  border-radius: var(--radius-button);
  background: var(--color-blue);
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.qr-tool__file-trigger:hover {
  background: var(--color-primary);
}

.qr-tool__file-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.qr-tool__file-name.is-selected {
  color: #0f172a;
}

.qr-tool__logo-preview {
  position: relative;
  width: 48px;
  height: 48px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #f8fafc;
}

.qr-tool__logo-preview img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.qr-tool__logo-preview.hidden {
  display: none;
}

.qr-tool__clear-logo {
  position: absolute;
  top: 4px;
  right: 4px;
  border: none;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  font-size: 14px;
  line-height: 1;
  display: grid;
  place-items: center;
}

.qr-tool__generate {
  width: 100%;
  padding: 12px 20px;
  font-size: 0.9375rem;
}

.qr-tool__result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.qr-tool__preview {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 280px;
  height: 280px;
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-card);
  padding: 16px;
  background: #f8fafc;
}

.qr-tool__preview canvas,
.qr-tool__preview img {
  max-width: 100%;
  max-height: 100%;
  display: block;
}

.qr-tool__preview.is-empty {
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-align: center;
}

.qr-tool__download {
  padding: 10px 16px;
  font-size: 0.875rem;
}

.qr-tool__hint {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  text-align: center;
  line-height: 1.4;
  max-width: 320px;
}

.btn-primary {
  background: var(--color-blue);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-button);
  padding: 6px 10px;
  font-size: 13px;
  font-weight: 600;
  transition: background-color 0.15s ease, box-shadow 0.15s ease, transform 0.05s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary:not(:disabled):hover {
  background: var(--color-primary);
}

.btn-primary:not(:disabled):active {
  transform: translateY(1px);
}

.btn-primary:disabled {
  opacity: 0.65;
  cursor: wait;
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-black);
  border-radius: var(--radius-button);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid rgba(226, 232, 240, 1);
  white-space: nowrap;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-secondary:not(:disabled):hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-secondary:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

@media (max-width: 640px) {
  .qr-tool__file-control {
    flex-wrap: wrap;
    padding: 10px 12px;
  }

  .qr-tool__file-trigger {
    width: 100%;
  }

  .qr-tool__file-name {
    width: 100%;
  }
}