:root {
  --bg: #1b1714;
  --panel: #27211d;
  --panel-soft: #322a24;
  --field: #211c18;
  --text: #f8efe4;
  --muted: #c7b5a2;
  --line: #493b31;
  --orange: #f0a35a;
  --orange-soft: #3a2b20;
  --orange-strong: #ffbd7a;
  --red: #e66c61;
  --green: #65c58e;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.26);
}

* { box-sizing: border-box; }
html { min-height: 100%; }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  font-family: Aptos, 'Segoe UI', Tahoma, sans-serif;
  background: var(--bg);
}

.signal-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at top left, rgba(240, 163, 90, 0.16), transparent 26rem),
    radial-gradient(circle at bottom right, rgba(255, 189, 122, 0.08), transparent 24rem),
    linear-gradient(180deg, #1b1714 0%, #211b17 100%);
}

button, input, textarea { font: inherit; }

button {
  border: 0;
  border-radius: 12px;
  padding: 0.82rem 1rem;
  color: #24170d;
  background: var(--orange);
  cursor: pointer;
  font-weight: 800;
  transition: background 160ms ease, transform 160ms ease, box-shadow 160ms ease;
}

button:hover {
  background: var(--orange-strong);
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.22);
}

button:disabled { cursor: wait; opacity: 0.65; }

.app-shell {
  width: min(1360px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 2rem;
}

.topbar, .prompt-sidebar, .editor-panel, .login-card, .login-intro {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  border-radius: 22px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  color: #24170d;
  border-radius: 16px;
  background: var(--orange);
  font-weight: 950;
  letter-spacing: -0.06em;
}

h1, h2, p { margin-top: 0; }

h1 {
  margin-bottom: 0;
  color: var(--text);
  font-size: clamp(1.55rem, 3vw, 2.6rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 0.25rem;
  color: var(--text);
  font-size: clamp(1.45rem, 2.6vw, 2.2rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.eyebrow {
  margin-bottom: 0.35rem;
  color: var(--orange-strong);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.muted { color: var(--muted); }

.ghost-button {
  color: var(--text);
  border: 1px solid var(--line);
  background: var(--panel-soft);
}

.ghost-button:hover {
  color: #24170d;
  background: var(--orange);
}

.danger-button {
  color: #2b100c;
  background: var(--red);
}

.danger-button:hover { background: #f07b70; }

.workspace-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.prompt-sidebar, .editor-panel { border-radius: 22px; }
.prompt-sidebar { padding: 1rem; }

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.9rem;
  color: var(--text);
  font-weight: 900;
}

.section-title small { color: var(--muted); font-size: 0.78rem; }
.status-grid { display: grid; gap: 0.8rem; }

.prompt-card {
  display: grid;
  gap: 0.42rem;
  width: 100%;
  min-height: 120px;
  padding: 1rem;
  color: var(--text);
  text-align: left;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-soft);
  box-shadow: none;
}

.prompt-card span {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.prompt-card strong, .prompt-card small {
  color: var(--muted);
  font-family: 'Cascadia Mono', 'SFMono-Regular', Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 600;
}

.prompt-card.active {
  color: var(--text);
  border-color: rgba(240, 163, 90, 0.72);
  background: var(--orange-soft);
}

.prompt-card.active span { color: var(--orange-strong); }
.prompt-card.active strong, .prompt-card.active small { color: #d8bfa7; }

.editor-panel { padding: 1rem; }

.editor-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: flex-end;
}

.markdown-shell {
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  background: var(--panel);
}

.toolbar, .emoji-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.72rem;
  border-bottom: 1px solid var(--line);
  background: var(--panel-soft);
}

.emoji-bar { background: var(--panel); }

.toolbar button, .emoji-bar button {
  min-height: 38px;
  padding: 0.52rem 0.72rem;
  color: var(--text);
  border: 1px solid var(--line);
  background: var(--field);
  box-shadow: none;
  font-size: 0.86rem;
}

.preview-toggle {
  margin-left: auto;
}

.toolbar button:hover, .emoji-bar button:hover {
  color: #24170d;
  background: var(--orange);
  box-shadow: none;
}

.emoji-bar button { min-width: 42px; font-size: 1.05rem; }

.editor-grid {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 58vh;
}

.editor-grid.preview-open {
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
}

.editor-box {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 58vh;
  border-right: 0;
}

.editor-grid.preview-open .editor-box {
  border-right: 1px solid var(--line);
}

.editor-box > span, .preview-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 46px;
  padding: 0.72rem 0.9rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--panel-soft);
}

textarea {
  width: 100%;
  min-height: 100%;
  padding: 1rem;
  color: #111111;
  border: 0;
  outline: none;
  resize: vertical;
  background: #ffffff;
  font-family: 'Cascadia Mono', 'SFMono-Regular', Consolas, monospace;
  font-size: 0.96rem;
  line-height: 1.65;
}

textarea:focus, input:focus { box-shadow: inset 0 0 0 2px rgba(240, 163, 90, 0.38); }

.preview-box {
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 58vh;
  background: #ffffff;
  color: #111111;
}

.preview-box[hidden] {
  display: none;
}

.preview-head { border-bottom: 1px solid var(--line); }

.markdown-preview {
  padding: 1.1rem;
  overflow: auto;
  line-height: 1.65;
}

.markdown-preview h2, .markdown-preview h3, .markdown-preview h4 {
  margin: 0.8rem 0 0.35rem;
  color: #8d4a13;
  letter-spacing: -0.02em;
}

.markdown-preview p, .markdown-preview ul, .markdown-preview blockquote { margin-bottom: 0.9rem; }
.markdown-preview ul { padding-left: 1.2rem; }
.markdown-preview li::marker { color: var(--orange); }

.markdown-preview blockquote {
  margin-left: 0;
  padding: 0.8rem 1rem;
  border-left: 4px solid var(--orange);
  border-radius: 12px;
  background: #fff1df;
}

.markdown-preview code {
  padding: 0.12rem 0.35rem;
  border-radius: 7px;
  background: #fff1df;
  font-family: 'Cascadia Mono', 'SFMono-Regular', Consolas, monospace;
}

.markdown-preview hr { border: 0; border-top: 1px solid var(--line); }
.empty-preview { color: var(--muted); }

.message {
  min-height: 1.4rem;
  margin: 0.85rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.message.success { color: var(--green); }
.message.error { color: var(--red); }

.login-page {
  display: grid;
  place-items: center;
  padding: 1rem;
}

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

.login-card {
  border-radius: 26px;
  padding: clamp(1.3rem, 4vw, 2.2rem);
}

.login-card { display: grid; gap: 0.25rem; }

.login-card .brand-mark { margin-bottom: 1rem; }

.login-form {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}

label {
  display: grid;
  gap: 0.45rem;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 900;
}

input {
  width: 100%;
  padding: 0.95rem 1rem;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  outline: none;
  background: var(--field);
}

@media (max-width: 1040px) {
  .workspace-grid { grid-template-columns: 1fr; }
  .status-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .topbar, .editor-head { grid-template-columns: 1fr; }
  .editor-grid, .editor-grid.preview-open { grid-template-columns: 1fr; }
  .editor-box { border-right: 0; border-bottom: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .app-shell { width: min(100% - 1rem, 1360px); }
  .status-grid { grid-template-columns: 1fr; }
  .actions, .topbar { display: grid; }
  .actions button, .ghost-button { width: 100%; }
}