:root {
  --paper: #F1F2ED;
  --surface: #FFFFFF;
  --ink: #1B2420;
  --ink-soft: #5C6B62;
  --line: #D8DCD3;
  --accent: #1F6F52;
  --accent-hover: #175A42;
  --accent-wash: #E6EFE9;
  --warn: #B3492D;
  --warn-wash: #F7E7E1;
  --rail-bg: #14251E;
  --rail-ink: #E7ECE7;
  --rail-ink-dim: #8FA398;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
  --sans: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: Charter, Georgia, "Iowan Old Style", serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

.frame {
  display: flex;
  min-height: 100vh;
}

/* ---------- Rail ---------- */
.rail {
  width: 240px;
  flex-shrink: 0;
  background: var(--rail-bg);
  color: var(--rail-ink);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  gap: 36px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.rail-brand {
  font-family: var(--serif);
  font-size: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.01em;
}
.rail-mark { color: var(--accent); font-size: 16px; }

.rail-steps {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rail-step {
  display: flex;
  align-items: center;
  gap: 12px;
  background: none;
  border: none;
  color: var(--rail-ink-dim);
  text-align: left;
  padding: 10px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-family: var(--sans);
}
.rail-step:hover { background: rgba(255,255,255,0.05); }
.rail-step.is-active { color: var(--rail-ink); background: rgba(255,255,255,0.08); }
.rail-step-num {
  font-family: var(--mono);
  font-size: 12px;
  width: 20px; height: 20px;
  border: 1px solid var(--rail-ink-dim);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.rail-step.is-active .rail-step-num { border-color: var(--accent); color: var(--accent); }
.rail-step.is-done .rail-step-num { background: var(--accent); border-color: var(--accent); color: #fff; }

.rail-status { margin-top: auto; font-size: 12px; }
.rail-status-row { display: flex; align-items: center; gap: 8px; color: var(--rail-ink-dim); }
.dot { width: 7px; height: 7px; border-radius: 50%; }
.dot-on { background: #4FAE84; }
.dot-off { background: var(--warn); }
.rail-status-mono { font-family: var(--mono); color: var(--rail-ink-dim); margin-top: 4px; font-size: 11px; }
.rail-status-warn { color: #E3A98A; margin-top: 8px; line-height: 1.5; }
.rail-account {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 16px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.1);
}
.rail-account-name { color: var(--rail-ink-dim); font-family: var(--mono); font-size: 11px; }
.rail-logout { color: var(--rail-ink-dim); font-size: 12px; text-decoration: none; }
.rail-logout:hover { color: var(--rail-ink); text-decoration: underline; }

/* ---------- Sample file links ---------- */
.sample-links { margin-top: 14px; font-size: 13px; color: var(--ink-soft); }
.sample-links a { color: var(--accent); text-decoration: none; }
.sample-links a:hover { text-decoration: underline; }
.sample-sep { margin: 0 8px; color: var(--line); }

/* ---------- Login page ---------- */
.login-body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; background: var(--rail-bg);
}
.login-card {
  width: 320px; background: var(--surface); border-radius: 6px;
  padding: 36px 32px; box-shadow: 0 20px 60px rgba(0,0,0,0.35);
}
.login-brand {
  font-family: var(--serif); font-size: 20px; display: flex; align-items: center;
  gap: 8px; margin-bottom: 28px; color: var(--ink);
}
.login-form { display: flex; flex-direction: column; gap: 16px; }
.login-form .btn { margin-top: 4px; }
.login-warn { color: var(--ink-soft); font-size: 13.5px; line-height: 1.6; }
.login-warn code { font-family: var(--mono); background: var(--accent-wash); padding: 1px 5px; border-radius: 3px; }

/* ---------- Stage ---------- */
.stage {
  flex: 1;
  padding: 56px 64px;
  max-width: 860px;
}

.panel { display: none; }
.panel.is-active { display: block; animation: rise 0.25s ease; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.panel-head h1 {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 10px;
}
.panel-head p {
  color: var(--ink-soft);
  max-width: 60ch;
  line-height: 1.6;
  margin: 0 0 32px;
}

/* ---------- Tabs ---------- */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 24px; }
.tab {
  background: none; border: none; cursor: pointer;
  padding: 10px 4px; margin-right: 24px;
  font-size: 14px; color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  font-family: var(--sans);
}
.tab.is-active { color: var(--ink); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 20px; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--ink-soft); }
.field-wide { grid-column: 1 / -1; }
.field span:first-child { color: var(--ink); font-weight: 600; }
.field input, .field select, .field textarea {
  font-family: var(--sans);
  font-size: 14px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--surface);
  color: var(--ink);
}
.field textarea { font-family: var(--mono); resize: vertical; line-height: 1.5; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);
}
.field small { color: var(--ink-soft); font-weight: 400; }

.note { color: var(--ink-soft); font-size: 13px; margin-top: 18px; line-height: 1.6; }

/* ---------- Buttons ---------- */
.btn {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  padding: 11px 20px;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-solid { background: var(--accent); color: #fff; }
.btn-solid:hover { background: var(--accent-hover); }
.btn-solid:disabled { background: var(--line); color: var(--ink-soft); cursor: not-allowed; }
.btn-line { background: transparent; border-color: var(--line); color: var(--ink); }
.btn-line:hover { border-color: var(--accent); color: var(--accent); }
.btn-large { padding: 14px 28px; font-size: 15px; }
.btn-small { padding: 4px 12px; font-size: 12px; }
.btn-small.is-active { background: var(--accent); color: white; border-color: var(--accent); }

.panel-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.selected-summary { font-size: 13px; color: var(--ink-soft); font-family: var(--mono); }

.hint { font-size: 12.5px; color: var(--ink-soft); }
.hint.is-error { color: var(--warn); }
.hint.is-ok { color: var(--accent); }

.row-between { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }

/* ---------- Template list ---------- */
.template-list { display: flex; flex-direction: column; gap: 8px; }
.template-item {
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 14px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
}
.template-item:hover { border-color: var(--accent); }
.template-item.is-selected { border-color: var(--accent); background: var(--accent-wash); }
.template-item-name { font-family: var(--mono); font-size: 13.5px; }
.template-item-status {
  font-size: 11px; text-transform: lowercase; padding: 3px 8px; border-radius: 20px;
  font-family: var(--mono);
}
.status-approved { background: var(--accent-wash); color: var(--accent); }
.status-pending { background: #F3EED8; color: #8A6D1D; }
.status-rejected { background: var(--warn-wash); color: var(--warn); }

/* ---------- Upload ---------- */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 48px 20px;
  border: 1.5px dashed var(--line);
  border-radius: 4px;
  cursor: pointer;
  color: var(--ink-soft);
  text-align: center;
}
.dropzone:hover, .dropzone.is-dragover { border-color: var(--accent); background: var(--accent-wash); color: var(--ink); }
.dropzone-icon { font-size: 22px; color: var(--accent); }
.dropzone-text { font-size: 14px; }

.upload-summary { margin-top: 28px; }
.stat { display: inline-flex; flex-direction: column; margin-right: 40px; }
.stat-num { font-family: var(--mono); font-size: 26px; }
.stat-label { font-size: 12.5px; color: var(--ink-soft); }

.preview-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  font-family: var(--mono);
  font-size: 12.5px;
}
.preview-table th, .preview-table td {
  border: 1px solid var(--line);
  padding: 6px 10px;
  text-align: left;
  white-space: nowrap;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.preview-table th { background: var(--surface); color: var(--ink-soft); font-weight: 600; }

/* ---------- Matching ---------- */
.match-grid { display: flex; flex-direction: column; gap: 24px; max-width: 480px; }
.var-map-rows { display: flex; flex-direction: column; gap: 10px; }
.var-map-row { display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: 13px; }
.var-map-row .var-tag {
  background: var(--rail-bg); color: var(--rail-ink);
  padding: 4px 8px; border-radius: 3px; font-size: 12px; flex-shrink: 0;
}
.var-map-row select { flex: 1; }

.preview-block { margin-top: 32px; }
.preview-block-head { font-size: 12.5px; color: var(--ink-soft); margin-bottom: 8px; }
.message-preview {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.6;
  white-space: pre-wrap;
  max-width: 480px;
}

/* ---------- Send ---------- */
.send-summary {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 18px 20px;
  font-size: 14px;
  line-height: 2;
  margin-bottom: 24px;
  max-width: 480px;
}
.send-summary b { font-family: var(--mono); }

.progress-block { margin-top: 32px; }
.progress-bar-track { height: 8px; background: var(--line); border-radius: 4px; overflow: hidden; }
.progress-bar-fill { height: 100%; background: var(--accent); width: 0%; transition: width 0.2s ease; }
.progress-stats { display: flex; gap: 24px; margin-top: 12px; font-size: 13px; color: var(--ink-soft); }
.progress-stats strong { color: var(--ink); font-family: var(--mono); }

.log {
  margin-top: 20px;
  max-height: 320px;
  overflow-y: auto;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  font-family: var(--mono);
  font-size: 12.5px;
}
.log-row { display: flex; gap: 12px; padding: 7px 12px; border-bottom: 1px solid var(--line); }
.log-row:last-child { border-bottom: none; }
.log-row .log-time { color: var(--ink-soft); flex-shrink: 0; }
.log-row .log-phone { flex-shrink: 0; width: 120px; }
.log-row.is-failed .log-detail { color: var(--warn); }
.log-row.is-sent .log-detail { color: var(--accent); }

/* ---------- Chat ---------- */
.chat-container {
  display: flex;
  gap: 0;
  height: 500px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  overflow: hidden;
}
.contact-list {
  width: 240px;
  flex-shrink: 0;
  border-right: 1px solid var(--line);
  overflow-y: auto;
  padding: 8px 0;
  background: var(--paper);
}
.contact-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  cursor: pointer;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}
.contact-item:hover { background: var(--accent-wash); }
.contact-item.selected { background: var(--accent-wash); border-left: 3px solid var(--accent); }
.contact-info { flex: 1; overflow: hidden; }
.contact-phone { font-weight: 600; font-size: 14px; }
.contact-last { font-size: 11px; color: var(--ink-soft); }
.unread-badge {
  background: var(--accent);
  color: white;
  border-radius: 50%;
  padding: 2px 7px;
  font-size: 11px;
  margin-left: 8px;
}
.chat-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.chat-header {
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  font-weight: 600;
  background: var(--surface);
}
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--paper);
}
.message {
  max-width: 75%;
  padding: 8px 12px;
  border-radius: 8px;
  position: relative;
}
.msg-incoming {
  align-self: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
}
.msg-outgoing {
  align-self: flex-end;
  background: var(--accent);
  color: white;
}
.msg-content { word-break: break-word; }
.msg-time { font-size: 10px; color: var(--ink-soft); margin-top: 3px; }
.msg-outgoing .msg-time { color: rgba(255,255,255,0.8); }
.msg-meta { font-size: 10px; opacity: 0.7; margin-top: 2px; }

.reply-area {
  border-top: 1px solid var(--line);
  padding: 12px 16px;
  background: var(--surface);
}
.reply-type-toggle { display: flex; gap: 4px; margin-bottom: 8px; }
.reply-input-row { display: flex; gap: 8px; }
.reply-input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-size: 14px;
}
.template-select { display: flex; gap: 8px; margin-top: 8px; align-items: flex-start; }
.template-select select { flex: 1; }

/* ---------- Post-send actions ---------- */
.post-send-actions { display: flex; gap: 10px; margin-top: 20px; }

/* ---------- Campaign history table ---------- */
.campaign-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.campaign-table th, .campaign-table td {
  border: 1px solid var(--line);
  padding: 8px 12px;
  text-align: left;
}
.campaign-table th { background: var(--surface); color: var(--ink-soft); font-weight: 600; }
.campaign-table .mono { font-family: var(--mono); }
.campaign-actions { display: flex; gap: 8px; }

/* ---------- Message status (delivery/read receipts) ---------- */
.msg-status { font-size: 10px; margin-top: 2px; text-transform: uppercase; letter-spacing: 0.03em; }
.msg-status-sent, .msg-status-delivered { color: var(--ink-soft); }
.msg-status-read { color: var(--accent); }
.msg-status-failed { color: var(--warn); }
.msg-outgoing .msg-status-sent,
.msg-outgoing .msg-status-delivered { color: rgba(255,255,255,0.75); }
.msg-outgoing .msg-status-read { color: #B9F0D6; }

/* ---------- Multi-variable template reply inputs ---------- */
.template-vars-container { display: flex; flex-direction: column; gap: 6px; flex: 2; }
.reply-var-input { width: 100%; }

@media (max-width: 800px) {
  .frame { flex-direction: column; }
  .rail { width: 100%; height: auto; position: static; flex-direction: row; align-items: center; gap: 20px; padding: 16px 20px; overflow-x: auto; }
  .rail-steps { flex-direction: row; }
  .rail-status { display: none; }
  .stage { padding: 32px 20px; }
  .form-grid { grid-template-columns: 1fr; }
  .chat-container { flex-direction: column; height: auto; }
  .contact-list { width: 100%; max-height: 200px; border-right: none; border-bottom: 1px solid var(--line); }
  .chat-pane { height: 400px; }
}
/* ---------- PWA install button ---------- */
.install-fab {
  position: fixed;
  right: 20px;
  bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  z-index: 50;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 12px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}
.install-fab:hover { background: var(--accent-hover); }

/* ---------- Standalone (installed) mode — respect notches/status bars ---------- */
@media (display-mode: standalone) {
  .rail { padding-top: calc(28px + env(safe-area-inset-top, 0px)); }
  .login-body { padding-top: env(safe-area-inset-top, 0px); }
}