:root {
  --ink: #17212f;
  --muted: #667085;
  --line: #d9e0ea;
  --paper: #f5f7fb;
  --white: #ffffff;
  --red: #c5162e;
  --navy: #153a5b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
  text-decoration: none;
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 250px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 28px;
  color: var(--white);
  background: var(--ink);
}

.admin-logo {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 8px;
  background: var(--red);
  color: var(--white);
  font-weight: 800;
}

.sidebar nav {
  display: grid;
  gap: 8px;
  margin-top: 20px;
}

.sidebar nav a,
.logout {
  padding: 12px;
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.06);
  font-weight: 700;
}

.logout {
  margin-top: auto;
}

.admin-main {
  width: min(1180px, calc(100% - 290px));
  margin-left: 270px;
  padding: 30px 20px 80px;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
}

.admin-header p {
  margin: 0 0 6px;
  color: var(--red);
  font-weight: 800;
  text-transform: uppercase;
}

.admin-header h1 {
  margin: 0;
  font-size: 36px;
}

.preview,
.save-bar button,
.login-card button {
  border: 0;
  border-radius: 8px;
  padding: 13px 18px;
  color: var(--white);
  background: var(--red);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.panel-card,
.login-card {
  margin-bottom: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 18px 48px rgba(17, 29, 47, 0.08);
}

.panel-card h2 {
  margin: 0 0 20px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 13px;
  color: var(--ink);
  background: #fbfcfe;
  font: inherit;
}

textarea {
  resize: vertical;
}

.wide {
  grid-column: 1 / -1;
}

.image-preview img,
.edit-product img {
  width: 100%;
  max-height: 170px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.repeat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.mini-card {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.product-editor {
  display: grid;
  gap: 16px;
}

.edit-product {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.edit-product h3 {
  margin: 0 0 12px;
}

.save-bar {
  position: sticky;
  bottom: 0;
  z-index: 5;
  display: flex;
  justify-content: flex-end;
  padding: 14px 0;
  background: linear-gradient(rgba(245, 247, 251, 0), var(--paper) 30%);
}

.message-list {
  display: grid;
  gap: 12px;
}

.message-list article {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.message-list span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.alert {
  margin-bottom: 18px;
  padding: 14px 16px;
  border-radius: 8px;
  font-weight: 800;
}

.success {
  color: #175f36;
  background: #dff7e9;
}

.error {
  color: #8f1021;
  background: #ffe2e7;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
  background: linear-gradient(135deg, var(--ink), var(--navy));
}

.login-card {
  width: min(430px, 100%);
}

.login-card h1 {
  margin: 18px 0 8px;
}

.login-card p {
  margin: 0 0 20px;
  color: var(--muted);
}

.login-card form {
  display: grid;
  gap: 14px;
}

@media (max-width: 900px) {
  .sidebar {
    position: static;
    width: auto;
  }

  .admin-main {
    width: 100%;
    margin-left: 0;
  }

  .form-grid,
  .repeat-grid,
  .edit-product {
    grid-template-columns: 1fr;
  }
}