:root {
  color-scheme: light;
  --bg: #f6f8f7;
  --ink: #17211c;
  --muted: #607064;
  --line: #cfd8d1;
  --panel: #ffffff;
  --accent: #0f766e;
  --accent-strong: #0b5e58;
  --warn: #a13d16;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  padding: 10px 14px;
  cursor: pointer;
}

button:hover {
  background: var(--accent-strong);
}

button.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

button.ghost:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: #eef8f6;
}

.hidden {
  display: none !important;
}

.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(420px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

.shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
}

.topbar nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.1;
}

h2 {
  margin: 0;
  font-size: 24px;
}

.notice {
  border: 1px solid #9fbab4;
  background: #e9f6f3;
  color: #18443e;
  border-radius: 8px;
  padding: 14px 16px;
  margin: 14px 0 24px;
}

form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-weight: 600;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--ink);
  background: #fff;
}

textarea {
  resize: vertical;
}

.form-message {
  margin: 0;
  color: var(--warn);
  min-height: 20px;
}

.hint {
  margin: 0;
  color: var(--muted);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 20px 0 14px;
}

.firmware-list {
  display: grid;
  gap: 14px;
}

.firmware-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  display: grid;
  gap: 14px;
}

.firmware-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.firmware-title {
  display: grid;
  gap: 4px;
}

.firmware-title h3 {
  margin: 0;
  font-size: 20px;
}

.firmware-title p,
.firmware-details {
  margin: 0;
  color: var(--muted);
}

.firmware-actions {
  display: grid;
  gap: 10px;
}

.flash-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.flash-options > div {
  display: grid;
  align-content: start;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfb;
}

.flash-options span {
  font-weight: 800;
}

.flash-options p {
  min-height: 42px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

esp-web-install-button::part(button) {
  border-radius: 6px;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.flash-log {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfb;
}

.flash-log summary {
  cursor: pointer;
  padding: 10px 12px;
  color: var(--muted);
  font-weight: 700;
}

.flash-log pre {
  margin: 0;
  min-height: 96px;
  max-height: 260px;
  overflow: auto;
  border-top: 1px solid var(--line);
  padding: 12px;
  color: #10231e;
  background: #f1f5f3;
  white-space: pre-wrap;
}

.upload-form {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.user-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.user-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 14px;
}

.user-item strong {
  display: block;
}

.user-item span {
  color: var(--muted);
}

.user-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

@media (max-width: 680px) {
  .topbar,
  .firmware-meta,
  .section-head,
  .user-item,
  .user-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .flash-options {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 28px;
  }
}