/* ============================================================
   HARDDX — Hardware Diagnosis Console
   Design language: dark technician console, amber/phosphor-green
   diagnostic accents, PCB-trace structure, monospace data type.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root {
  --bg-deep:       #0b0f0d;
  --bg-panel:      #111613;
  --bg-panel-2:    #161d19;
  --line:          #243029;
  --line-bright:   #35463c;
  --text-primary:  #e7efe9;
  --text-dim:      #8aa195;
  --text-faint:    #5b6e63;
  --amber:         #ffb454;
  --phosphor:      #5eead4;
  --phosphor-dim:  #2c7a6e;
  --danger:        #ff6b6b;
  --warn:          #ffb454;
  --ok:            #5eead4;

  --font-display:  'IBM Plex Sans', sans-serif;
  --font-mono:     'JetBrains Mono', monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
}

body {
  background-image:
    radial-gradient(circle at 15% 0%, rgba(94,234,212,0.05), transparent 40%),
    radial-gradient(circle at 85% 100%, rgba(255,180,84,0.04), transparent 45%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Subtle CRT scanline texture — ambient, not distracting */
.scanlines {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255,255,255,0.012) 0px,
    rgba(255,255,255,0.012) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: overlay;
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ---------------- Visibility / hidden attribute ---------------- */

[hidden] { display: none !important; }

/* ---------------- Topbar ---------------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-deep) 100%);
  flex-shrink: 0;
}

.topbar-left { display: flex; align-items: center; gap: 12px; }

.logo-mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--bg-deep);
  background: var(--phosphor);
  border-radius: 4px;
  padding: 6px 8px;
  letter-spacing: 0.5px;
  box-shadow: 0 0 14px rgba(94,234,212,0.35);
}

.logo-text { display: flex; flex-direction: column; line-height: 1.15; }

.logo-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 1.5px;
  color: var(--text-primary);
}

.logo-sub {
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: 0.3px;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.8px;
  color: var(--text-dim);
  border: 1px solid var(--line-bright);
  border-radius: 999px;
  padding: 6px 12px;
}

.topbar-right { display: flex; align-items: center; gap: 10px; }

.settings-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.6px;
  background: transparent;
  border: 1px solid var(--line-bright);
  color: var(--text-dim);
  border-radius: 999px;
  padding: 6px 12px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.settings-btn:hover { border-color: var(--phosphor); color: var(--text-primary); }

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--phosphor);
  box-shadow: 0 0 8px var(--phosphor);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ---------------- Layout ---------------- */

.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 260px 1fr;
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
  gap: 0;
  min-height: 0;
}

/* ---------------- Rail (sidebar) ---------------- */

.rail {
  border-right: 1px solid var(--line);
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 26px;
  overflow-y: auto;
}

.rail-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 1.4px;
  color: var(--text-faint);
  margin-bottom: 10px;
}

.rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.rail-list li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  color: var(--text-dim);
}

.tick {
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  background: var(--phosphor-dim);
  transform: rotate(45deg);
}

.suggestion-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.suggestion-list li {
  font-size: 12.5px;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 10px;
  cursor: pointer;
  transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}

.suggestion-list li:hover {
  border-color: var(--phosphor-dim);
  color: var(--text-primary);
  background: rgba(94,234,212,0.05);
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 240px;
  overflow-y: auto;
}

.history-item {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  background: rgba(255,255,255,0.02);
}

.history-user { border-left: 2px solid var(--phosphor-dim); }
.history-assistant { border-left: 2px solid var(--amber); }

.history-role {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.9px;
  color: var(--text-faint);
}

.history-content {
  font-size: 12px;
  line-height: 1.45;
  color: var(--text-dim);
  word-break: break-word;
}

.history-empty {
  font-size: 12px;
  color: var(--text-faint);
  border: 1px dashed var(--line);
  border-radius: 8px;
  padding: 10px;
}

.rail-disclaimer p {
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--text-faint);
  margin: 0;
}

/* ---------------- Console (main chat area) ---------------- */

.console {
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: calc(100vh - 64px);
}

.console-feed {
  flex: 1;
  overflow-y: auto;
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.msg { display: flex; flex-direction: column; max-width: 78%; }
.msg-user { align-self: flex-end; align-items: flex-end; }
.msg-bot { align-self: flex-start; align-items: flex-start; }

.msg-meta {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 1px;
  color: var(--text-faint);
  margin-bottom: 5px;
  padding: 0 4px;
}

.msg-bubble {
  font-size: 14px;
  line-height: 1.55;
  padding: 12px 15px;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.msg-bot .msg-bubble {
  background: var(--bg-panel);
  color: var(--text-primary);
  border-top-left-radius: 3px;
}

.msg-user .msg-bubble {
  background: rgba(94,234,212,0.08);
  border-color: var(--phosphor-dim);
  color: var(--text-primary);
  border-top-right-radius: 3px;
}

.msg-typing .msg-bubble {
  display: flex;
  gap: 5px;
  align-items: center;
  padding: 14px 16px;
}

.typing-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--phosphor);
  animation: typing 1.1s infinite ease-in-out;
}
.typing-dot:nth-child(2) { animation-delay: 0.15s; }
.typing-dot:nth-child(3) { animation-delay: 0.3s; }

@keyframes typing {
  0%, 60%, 100% { opacity: 0.25; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-2px); }
}

/* ---------------- Diagnosis card ---------------- */

.diagnosis-card {
  width: 100%;
  max-width: 100%;
  background: var(--bg-panel-2);
  border: 1px solid var(--line-bright);
  border-left: 3px solid var(--phosphor);
  border-radius: 8px;
  padding: 16px 18px;
  margin-top: 4px;
}

.diagnosis-card.severity-high { border-left-color: var(--danger); }
.diagnosis-card.severity-medium { border-left-color: var(--amber); }
.diagnosis-card.severity-low { border-left-color: var(--phosphor); }

.diagnosis-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4px;
}

.diagnosis-label {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--text-primary);
  letter-spacing: 0.2px;
}

.diagnosis-confidence {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
}

.diagnosis-severity {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 14px;
}

.section-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 1.2px;
  color: var(--phosphor-dim);
  margin-bottom: 8px;
  margin-top: 14px;
}

.cause-list, .step-list {
  margin: 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cause-list li, .step-list li {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
}

.step-list li::marker {
  color: var(--phosphor);
  font-family: var(--font-mono);
  font-weight: 600;
}

.diagnosis-feedback {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  color: var(--text-faint);
}

.fb-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.5px;
  background: transparent;
  border: 1px solid var(--line-bright);
  color: var(--text-dim);
  border-radius: 5px;
  padding: 5px 11px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.fb-btn:hover { border-color: var(--phosphor); color: var(--text-primary); }
.fb-btn.selected { background: var(--phosphor-dim); color: var(--bg-deep); border-color: var(--phosphor-dim); }
.fb-btn:disabled { cursor: default; opacity: 0.6; }

/* ---------------- Composer ---------------- */

.composer {
  display: flex;
  gap: 10px;
  padding: 16px 28px 22px;
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
  flex-shrink: 0;
}

.composer-input {
  flex: 1;
  background: var(--bg-panel);
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  padding: 13px 14px;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.composer-input::placeholder { color: var(--text-faint); }

.composer-input:focus {
  border-color: var(--phosphor);
  box-shadow: 0 0 0 3px rgba(94,234,212,0.12);
}

.composer-send {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.6px;
  background: var(--phosphor);
  color: #06231e;
  border: none;
  border-radius: 8px;
  padding: 0 20px;
  cursor: pointer;
  transition: filter 0.15s ease, transform 0.1s ease;
}

.composer-send:hover { filter: brightness(1.08); }
.composer-send:active { transform: scale(0.97); }
.composer-send:disabled { opacity: 0.5; cursor: default; }

/* ---------------- Scrollbars ---------------- */

.console-feed::-webkit-scrollbar, .rail::-webkit-scrollbar { width: 8px; }
.console-feed::-webkit-scrollbar-thumb, .rail::-webkit-scrollbar-thumb {
  background: var(--line-bright);
  border-radius: 8px;
}
.console-feed::-webkit-scrollbar-track, .rail::-webkit-scrollbar-track { background: transparent; }

/* ---------------- Image attach + preview ---------------- */

.composer-attach {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-panel);
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  font-size: 17px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.composer-attach:hover { border-color: var(--phosphor); background: rgba(94,234,212,0.06); }

.image-preview-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 28px 12px;
  padding: 8px 10px;
  background: var(--bg-panel);
  border: 1px solid var(--line-bright);
  border-radius: 8px;
  width: fit-content;
  max-width: calc(100% - 56px);
}

.image-preview-bar img {
  width: 36px;
  height: 36px;
  object-fit: cover;
  border-radius: 5px;
  border: 1px solid var(--line);
}

.image-preview-name {
  font-size: 12px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 220px;
}

.image-preview-remove {
  background: transparent;
  border: none;
  color: var(--text-faint);
  cursor: pointer;
  font-size: 13px;
  padding: 2px 6px;
  border-radius: 4px;
}

.image-preview-remove:hover { color: var(--danger); background: rgba(255,107,107,0.1); }

/* Image embedded directly in a user message bubble */
.msg-image-thumb {
  max-width: 220px;
  max-height: 220px;
  border-radius: 8px;
  border: 1px solid var(--line-bright);
  display: block;
  margin-bottom: 6px;
  object-fit: cover;
}

/* ---------------- Modal (Gemini API key settings) ---------------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}

.modal {
  background: var(--bg-panel-2);
  border: 1px solid var(--line-bright);
  border-radius: 12px;
  padding: 26px;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.modal h2 {
  font-size: 17px;
  margin: 0 0 10px;
  color: var(--text-primary);
  font-family: var(--font-display);
}

.modal-copy {
  font-size: 13px;
  line-height: 1.55;
  color: var(--text-dim);
  margin: 0 0 18px;
}

.modal-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 1px;
  color: var(--text-faint);
  margin-bottom: 7px;
}

.modal-input {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--line-bright);
  border-radius: 7px;
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-primary);
  outline: none;
}

.modal-input:focus { border-color: var(--phosphor); }

.modal-hint {
  font-size: 11.5px;
  color: var(--text-faint);
  margin: 9px 0 0;
}

.modal-hint a { color: var(--phosphor-dim); }

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.modal-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.5px;
  border-radius: 7px;
  padding: 9px 16px;
  cursor: pointer;
  border: 1px solid transparent;
}

.modal-btn-secondary {
  background: transparent;
  border-color: var(--line-bright);
  color: var(--text-dim);
}

.modal-btn-secondary:hover { color: var(--text-primary); border-color: var(--phosphor-dim); }

.modal-btn-primary {
  background: var(--phosphor);
  color: #06231e;
  font-weight: 600;
}

.modal-btn-primary:hover { filter: brightness(1.08); }

/* ---------------- Step-by-step guided card ---------------- */

.step-card {
  width: 100%;
  background: var(--bg-panel-2);
  border: 1px solid var(--line-bright);
  border-left: 3px solid var(--phosphor);
  border-radius: 8px;
  padding: 15px 17px;
  margin-top: 4px;
}

.step-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 9px;
}

.step-number {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  color: var(--phosphor);
  letter-spacing: 0.5px;
}

.step-progress {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-faint);
}

.step-text {
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-primary);
  margin: 0 0 10px;
}

.step-check {
  font-size: 12.5px;
  color: var(--text-dim);
  font-style: italic;
  margin: 0 0 12px;
}

.step-check:empty { display: none; }

.step-reply-form {
  display: flex;
  gap: 8px;
}

.step-reply-input {
  flex: 1;
  background: var(--bg-deep);
  border: 1px solid var(--line-bright);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 13px;
  color: var(--text-primary);
  outline: none;
}

.step-reply-input:focus { border-color: var(--phosphor); }

.step-reply-send {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  background: var(--phosphor-dim);
  color: var(--bg-deep);
  border: none;
  border-radius: 6px;
  padding: 0 14px;
  cursor: pointer;
}

.step-reply-send:hover { filter: brightness(1.15); }

.step-card.step-answered {
  opacity: 0.55;
}

.step-card.step-answered .step-reply-form { display: none; }

/* ---------------- Responsive ---------------- */

@media (max-width: 820px) {
  .layout { grid-template-columns: 1fr; }
  .rail {
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 16px 18px;
    gap: 22px;
  }
  .rail-block { min-width: 200px; flex-shrink: 0; }
  .console { height: calc(100vh - 150px); }
  .msg { max-width: 92%; }
  .composer { padding: 14px 16px 18px; }
  .console-feed { padding: 18px 16px; }
  .image-preview-bar { margin: 0 16px 10px; max-width: calc(100% - 32px); }
}

/* Visible keyboard focus throughout */
button:focus-visible, input:focus-visible, li:focus-visible {
  outline: 2px solid var(--phosphor);
  outline-offset: 2px;
}