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

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: #f0f2f5;
  color: #1a1a2e;
  min-height: 100vh;
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

/* ── Login screen ── */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: #fff;
  border-radius: 12px;
  padding: 2.5rem 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.10);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  width: 100%;
  max-width: 360px;
}

.login-card h1 {
  font-size: 1.3rem;
  font-weight: 700;
  color: #0f3460;
  text-align: center;
}

.login-card p {
  font-size: 0.875rem;
  color: #666;
  text-align: center;
}

#btn-google-login {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1.4rem;
  background: #fff;
  border: 1px solid #d0d5dd;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: #333;
  cursor: pointer;
  transition: box-shadow 0.15s, background 0.15s;
  width: 100%;
  justify-content: center;
}

#btn-google-login:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  background: #fafafa;
}

#btn-google-login svg {
  flex-shrink: 0;
}

#login-error {
  font-size: 0.8rem;
  color: #c0392b;
  text-align: center;
  display: none;
}

/* ── App ── */
#app {
  display: none;
  flex-direction: column;
  align-items: flex-start;
  padding: 1.5rem 1rem;
}

.topbar {
  width: 100%;
  max-width: 640px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.topbar h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #0f3460;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: #555;
  flex-shrink: 0;
}

.user-info img {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
}

#user-name {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#btn-logout {
  padding: 0.45rem 0.9rem;
  border: 1px solid #d0d5dd;
  border-radius: 5px;
  background: #fff;
  font-size: 0.8rem;
  font-weight: 600;
  color: #555;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
  min-height: 36px;
}

#btn-logout:hover {
  background: #f5f5f5;
}

/* ── Cards & form ── */
.container {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.card {
  background: #fff;
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card h2 {
  font-size: 1rem;
  font-weight: 600;
  color: #0f3460;
  border-bottom: 1px solid #e8eaf0;
  padding-bottom: 0.5rem;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #444;
}

input,
select {
  padding: 0.6rem 0.75rem;
  border: 1px solid #d0d5dd;
  border-radius: 6px;
  font-size: 1rem;
  color: #1a1a2e;
  background: #fafafa;
  transition: border-color 0.15s;
  width: 100%;
  min-height: 44px;
  -webkit-appearance: none;
  appearance: none;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23888' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
}

input:focus,
select:focus {
  outline: none;
  border-color: #0f3460;
  background: #fff;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

#shopify-fields {
  display: none;
}

/* ── Shopify guide ── */
.shopify-guide {
  margin-top: 1rem;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  overflow: hidden;
}

.shopify-guide summary {
  padding: 0.75rem 1rem;
  background: #f8fafc;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  color: #334155;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.shopify-guide summary::before {
  content: "▶";
  font-size: 0.65rem;
  transition: transform 0.2s;
  color: #94a3b8;
}

.shopify-guide[open] summary::before {
  transform: rotate(90deg);
}

.shopify-guide summary::-webkit-details-marker {
  display: none;
}

.shopify-guide-body {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  border-top: 1px solid #e2e8f0;
}

.guide-section h4 {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748b;
}

.guide-section ol {
  margin: 0;
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.guide-section li {
  font-size: 0.875rem;
  color: #475569;
  line-height: 1.5;
}

.scopes-list {
  margin-top: 0.35rem;
  padding-left: 1.25rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.2rem 0.5rem;
  list-style: disc;
}

.scopes-list li {
  font-size: 0.8rem;
}

/* ── Buttons ── */
button {
  padding: 0.65rem 1.25rem;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#btn-generate {
  background: #0f3460;
  color: #fff;
  align-self: flex-start;
  min-height: 44px;
}

#btn-generate:not(:disabled):hover {
  background: #16213e;
}

#btn-destruct {
  background: #c0392b;
  color: #fff;
  align-self: flex-start;
  min-height: 44px;
}

#btn-destruct:not(:disabled):hover {
  background: #96281b;
}

/* ── Result boxes ── */
.result {
  display: none;
  flex-direction: column;
  gap: 0.5rem;
}

.result-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #888;
}

.result-box {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-family: monospace;
  word-break: break-all;
}

.result-box.success {
  background: #eafaf1;
  color: #1a6b3c;
  border: 1px solid #a9dfbf;
}

.result-box.error {
  background: #fdf0f0;
  color: #922b21;
  border: 1px solid #f5b7b1;
}

/* ── Spinner ── */
.spinner {
  display: none;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  vertical-align: middle;
  margin-left: 0.5rem;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ── Mobile ── */
@media (max-width: 520px) {
  #app {
    padding: 1rem 0.75rem;
  }

  .topbar {
    margin-bottom: 1rem;
    gap: 0.5rem;
    flex-wrap: nowrap;
    align-items: center;
  }

  .topbar h1 {
    font-size: 1.15rem;
    flex-shrink: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .user-info {
    margin-left: auto;
    flex-shrink: 0;
  }

  .login-card {
    padding: 2rem 1.25rem;
    border-radius: 0;
    box-shadow: none;
    min-height: 100vh;
    justify-content: center;
  }

  .card {
    padding: 1.25rem 1rem;
    border-radius: 8px;
  }

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

  .scopes-list {
    grid-template-columns: 1fr;
  }

  #btn-generate,
  #btn-destruct {
    align-self: stretch;
    width: 100%;
    font-size: 1rem;
  }

  #btn-google-login {
    font-size: 1rem;
    padding: 0.85rem 1.4rem;
    min-height: 48px;
  }

  label {
    font-size: 0.9rem;
  }
}