:root {
  --orange: #ff6a00;
  --orange-dark: #e95f00;
  --bg: #f4f5f7;
  --panel: #ffffff;
  --panel-2: #f8f9fb;
  --text: #16181d;
  --muted: #707680;
  --border: #dfe3e8;
  --danger: #b42318;
  --danger-bg: #fff1f0;
  --shadow: 0 20px 55px rgba(20, 24, 32, 0.10);
  --radius: 22px;
}

html[data-theme="dark"] {
  --bg: #111318;
  --panel: #181b21;
  --panel-2: #20242c;
  --text: #f5f6f8;
  --muted: #9ca3af;
  --border: #303640;
  --danger: #ff8d85;
  --danger-bg: #351d1d;
  --shadow: 0 20px 55px rgba(0, 0, 0, 0.30);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 106, 0, 0.08), transparent 30%),
    var(--bg);
  color: var(--text);
}

button,
input,
textarea {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 28px;
}

.notepad {
  min-height: calc(100vh - 110px);
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 26px 20px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: 12px;
  background: var(--orange);
  color: #fff;
  font-size: 15px;
  box-shadow: 0 8px 20px rgba(255, 106, 0, 0.25);
}

.brand h1 {
  margin: 0;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.icon-button {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease;
}

.icon-button:hover {
  transform: translateY(-1px);
  border-color: var(--orange);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px 26px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}

.button {
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 10px 14px;
  background: var(--panel);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
  transition:
    transform 0.16s ease,
    border-color 0.16s ease,
    background 0.16s ease;
}

.button:hover {
  transform: translateY(-1px);
  border-color: var(--orange);
}

.button-primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
}

.button-primary:hover {
  background: var(--orange-dark);
  border-color: var(--orange-dark);
}

.button-danger {
  margin-left: auto;
  color: var(--danger);
  background: var(--danger-bg);
}

.note-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 24px 26px 18px;
}

.note-title {
  width: 100%;
  padding: 0 0 16px;
  border: 0;
  border-bottom: 1px solid var(--border);
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: clamp(1.35rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.note-title::placeholder,
.note-content::placeholder {
  color: var(--muted);
  opacity: 0.75;
}

.note-content {
  width: 100%;
  flex: 1;
  min-height: 420px;
  margin-top: 18px;
  padding: 0;
  resize: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 1rem;
  line-height: 1.75;
}

.statusbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 26px;
  border-top: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--muted);
  font-size: 0.86rem;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.dot {
  opacity: 0.6;
}

.save-status {
  white-space: nowrap;
}

.privacy-note {
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 100;
  transform: translate(-50%, 20px);
  padding: 11px 15px;
  border-radius: 12px;
  background: #16181d;
  color: #fff;
  font-size: 0.9rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

@media (max-width: 700px) {
  .app-shell {
    width: 100%;
    padding: 0;
  }

  .notepad {
    min-height: 100vh;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }

  .topbar {
    padding: 18px 16px 16px;
  }

  .brand {
    gap: 11px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  .brand p {
    display: none;
  }

  .toolbar {
    padding: 12px 16px;
    gap: 8px;
  }

  .button {
    flex: 1 1 auto;
    min-width: calc(50% - 4px);
    padding: 10px 12px;
  }

  .button-danger {
    margin-left: 0;
  }

  .note-area {
    padding: 20px 16px 14px;
  }

  .note-content {
    min-height: 55vh;
    font-size: 16px;
  }

  .statusbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
    padding: 11px 16px;
  }

  .privacy-note {
    display: none;
  }
}