:root {
  --primary-color: #0f766e;
  --primary-hover: #115e59;
  --primary-soft: #dff7f4;
  --secondary-color: #1e293b;
  --secondary-hover: #0f172a;
  --bg-color: #e6fffb;
  --card-bg: #ffffff;
  --surface-color: #f8fafc;
  --text-main: #0f172a;
  --text-secondary: #475569;
  --border-color: #cbd5e1;
  --error-color: #b91c1c;
  --success-color: #047857;
  --info-color: #1d4ed8;
  --radius: 16px;
  --shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
  --shadow-soft: 0 12px 28px rgba(15, 23, 42, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", "Helvetica Neue", Tahoma, Geneva, Verdana, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 30%),
    radial-gradient(circle at bottom right, rgba(29, 78, 216, 0.14), transparent 28%),
    linear-gradient(135deg, #effcf9 0%, #f8fafc 100%);
  color: var(--text-main);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
  padding: 1rem;
}

.container {
  background: var(--card-bg);
  padding: 2.25rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 460px;
  border: 1px solid rgba(203, 213, 225, 0.55);
  backdrop-filter: blur(2px);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.container:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.15);
}

.container.wide {
  max-width: 680px;
}

.page-header {
  text-align: left;
  margin-bottom: -0.05rem;
}

.eyebrow {
  display: inline-block;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-color);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

h2 {
  margin: 0;
  color: var(--text-main);
  font-size: 2rem;
  line-height: 1.1;
}

p {
  color: var(--text-secondary);
  margin: 0.75rem 0 0;
  font-size: 0.96rem;
  line-height: 1.5;
}

.page-header p {
  max-width: 52ch;
}

.form-group,
.upload-section {
  margin-bottom: 1rem;
  text-align: left;
}

.field-error {
  min-height: 1rem;
  margin-top: 0.45rem;
  color: var(--error-color);
  font-size: 0.82rem;
  line-height: 1.35;
}

.form-row {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(140px, 1fr);
  gap: 1rem;
  align-items: end;
}

label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  transition: color 0.2s ease;
}

input,
select {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
  background-color: #fff;
  color: var(--text-main);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

input::placeholder {
  color: #94a3b8;
}

input:hover,
select:hover {
  border-color: #94a3b8;
  background-color: #fcfefe;
  box-shadow: var(--shadow-soft);
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: #fff;
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.15);
  transform: translateY(-1px);
}

input.input-error,
select.input-error {
  border-color: var(--error-color);
  box-shadow: 0 0 0 4px rgba(185, 28, 28, 0.12);
}

input[type="file"] {
  padding: 0.8rem;
  background-color: var(--surface-color);
  border-style: dashed;
  cursor: pointer;
  border-width: 2px;
}

input[type="file"]:hover {
  border-color: var(--primary-color);
  background-color: var(--primary-soft);
}

input[type="file"]::file-selector-button {
  margin-right: 0.8rem;
  border: none;
  border-radius: 9px;
  padding: 0.55rem 0.85rem;
  font-weight: 600;
  color: #fff;
  background-color: var(--secondary-color);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

input[type="file"]::file-selector-button:hover {
  background-color: var(--secondary-hover);
}

button {
  background-color: var(--primary-color);
  color: #fff;
  font-weight: 700;
  padding: 0.95rem 1rem;
  border: none;
  border-radius: 12px;
  width: 100%;
  cursor: pointer;
  font-size: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  margin-top: 0.75rem;
  box-shadow: 0 10px 20px rgba(15, 118, 110, 0.2);
  letter-spacing: 0.01em;
}

button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(15, 118, 110, 0.28);
}

button:active {
  transform: translateY(0);
  box-shadow: 0 8px 16px rgba(15, 118, 110, 0.22);
}

button:disabled {
  background-color: #94a3b8;
  box-shadow: none;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background-color: var(--secondary-color);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.16);
}

.btn-secondary:hover {
  background-color: var(--secondary-hover);
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.24);
}

.actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.actions button {
  margin-top: 0;
}

.menu-item + .menu-item {
  margin-top: 0.85rem;
}

.feedback {
  min-height: 1.25rem;
  margin-bottom: 1rem;
  font-size: 0.92rem;
  text-align: left;
}

.upload-page .feedback:empty {
  display: none;
}

.feedback.error {
  color: var(--error-color);
}

.feedback.success {
  color: var(--success-color);
}

.feedback.info {
  color: var(--info-color);
}

.signup-entry {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid #e2e8f0;
}

.signup-entry button {
  margin-top: 0.85rem;
}

.inline-note {
  margin-top: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.detail-box,
.summary {
  background: var(--surface-color);
  border: 1px solid #e2e8f0;
  border-radius: 14px;
}

.detail-box {
  padding: 1rem 1.1rem;
  min-height: 100%;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.detail-box:hover {
  border-color: #cbd5e1;
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.08);
}

.detail-box.compact {
  min-height: auto;
}

.detail-label {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text-secondary);
  font-size: 0.86rem;
  font-weight: 600;
}

.detail-box strong {
  display: block;
  font-size: 1.3rem;
  word-break: break-word;
}

.summary {
  padding: 0 1rem;
  margin-bottom: 1rem;
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid #e2e8f0;
  font-size: 0.95rem;
  transition: background-color 0.2s ease;
}

.summary-row:hover {
  background-color: #f1f5f9;
}

.summary-row:last-child {
  border-bottom: none;
}

.summary-row span {
  color: var(--text-secondary);
}

.sku-list {
  padding: 0 1rem;
}

.sku-row strong {
  flex: 1;
}

.sku-qty-select {
  width: 92px;
  min-width: 92px;
  flex-shrink: 0;
}

.hidden {
  display: none !important;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
  z-index: 1500;
}

.modal-card {
  width: 100%;
  max-width: 470px;
  background: var(--card-bg);
  border-radius: 18px;
  padding: 2rem;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.3);
}

body.loading::before {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.72);
  z-index: 1900;
}

body.loading::after {
  content: "";
  position: fixed;
  top: 50%;
  left: 50%;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 5px solid rgba(15, 118, 110, 0.18);
  border-top-color: var(--primary-color);
  transform: translate(-50%, -50%);
  animation: spin 0.8s linear infinite;
  z-index: 2000;
}

@keyframes spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

@media (max-width: 640px) {
  .container,
  .modal-card {
    padding: 1.5rem;
  }

  h2 {
    font-size: 1.65rem;
  }

  .form-row,
  .detail-grid,
  .actions {
    grid-template-columns: 1fr;
  }

  .summary-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
  }
}