/* ═══════════════════════════════════════════════════════
   StormBot · Jasmin Chat — style.css
   Modern AI-Chat UI · Dark-First · Mobile-Ready
   ═══════════════════════════════════════════════════════ */

/* ── Design Tokens ───────────────────────────────────── */
:root {
  --bg:              #07080f;
  --bg-deep:         #050610;
  --surface:         #0d0f1a;
  --surface-raised:  #111320;
  --surface-hover:   #161828;
  --border:          rgba(255,255,255,0.07);
  --border-mid:      rgba(255,255,255,0.11);
  --border-strong:   rgba(255,255,255,0.18);

  --text:            #e8ecf4;
  --text-secondary:  #8b93a8;
  --text-muted:      #515b70;

  --primary:         #596480;
  --primary-dim:     rgba(91,138,245,0.18);
  --primary-glow:    rgba(60, 85, 143, 0.32);
  --accent:          #62558a;
  --accent-dim:      rgba(167,139,250,0.15);

  --bubble-user-bg:  rgba(91,138,245,0.15);
  --bubble-user-bd:  rgba(91,138,245,0.28);
  --bubble-bot-bg:   rgba(255,255,255,0.04);
  --bubble-bot-bd:   rgba(255,255,255,0.09);

  --sidebar-w:       256px;
  --topbar-h:        56px;
  --input-h-min:     52px;

  --radius-sm:       8px;
  --radius-md:       14px;
  --radius-lg:       20px;
  --radius-xl:       28px;
  --radius-pill:     999px;

  --shadow-lg:       0 24px 64px rgba(0,0,0,0.55);
  --shadow-md:       0 8px 24px rgba(0,0,0,0.4);
  --shadow-sm:       0 2px 8px rgba(0,0,0,0.3);

  --transition:      0.2s cubic-bezier(0.4,0,0.2,1);
  --font:            'Inter', system-ui, -apple-system, sans-serif;
}

/* ── Reset & Base ────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--bg-deep);
  color: var(--text);
  min-height: 100dvh;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Background Orbs ─────────────────────────────────── */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(120px);
  opacity: 0.28;
}
.orb-1 {
  width: 600px; height: 600px;
  top: -200px; left: -200px;
  background: radial-gradient(circle, #35416b 0%, transparent 70%);
}
.orb-2 {
  width: 500px; height: 500px;
  bottom: -150px; right: -100px;
  background: radial-gradient(circle, #4a366e 0%, transparent 70%);
}
.orb-3 {
  width: 400px; height: 400px;
  top: 40%; left: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, #293557 0%, transparent 70%);
  opacity: 0.15;
}

/* ── App Layout ──────────────────────────────────────── */
.app-layout {
  position: relative;
  z-index: 1;
  display: flex;
  height: 100dvh;
  overflow: hidden;
}

/* ── Sidebar ─────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 16px 12px;
  gap: 8px;
  transition: transform var(--transition);
  overflow: hidden;
  z-index: 20;
}

.sidebar-header { padding: 4px 8px 8px; }

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.logo-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

.new-chat-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: var(--primary-dim);
  border: 1px solid var(--primary-glow);
  color: var(--primary);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-align: left;
}
.new-chat-btn:hover {
  background: rgba(91,138,245,0.26);
  transform: translateY(-1px);
}
.new-chat-btn:active { transform: translateY(0); }

/* Sidebar Nav */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border-mid) transparent;
}
.nav-section-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 4px 12px 6px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.nav-item:hover {
  background: var(--surface-hover);
  color: var(--text);
}
.nav-item.active {
  background: var(--surface-raised);
  color: var(--text);
}
.nav-item svg { flex-shrink: 0; opacity: 0.7; }

/* Sidebar Footer */
.sidebar-footer {
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  cursor: default;
}
.user-avatar {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.user-info { display: flex; flex-direction: column; }
.user-name { font-size: 0.875rem; font-weight: 600; color: var(--text); }
.user-tag  { font-size: 0.72rem; color: var(--text-muted); margin-top: 1px; }

/* ── Chat Area ───────────────────────────────────────── */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

/* ── Chat Topbar ─────────────────────────────────────── */
.chat-topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  background: rgba(7,8,15,0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.topbar-identity {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}
.bot-avatar-sm {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.topbar-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  display: block;
}
.topbar-status {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}
.status-dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 2px rgba(52,211,153,0.25);
  animation: pulse-dot 2.5s infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 2px rgba(52,211,153,0.25); }
  50%       { box-shadow: 0 0 0 5px rgba(52,211,153,0.1); }
}

.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.mobile-menu-btn:hover { background: var(--surface-hover); color: var(--text); }

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  flex-shrink: 0;
}
.icon-btn:hover { background: var(--surface-hover); color: var(--text); }

/* ── Chat Feed ───────────────────────────────────────── */
.chat-feed-wrapper {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.08) transparent;
}
.chat-feed-wrapper::-webkit-scrollbar { width: 5px; }
.chat-feed-wrapper::-webkit-scrollbar-track { background: transparent; }
.chat-feed-wrapper::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 999px; }

.chat-feed {
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 28px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 100%;
  outline: none;
}

/* ── Welcome State ───────────────────────────────────── */
.welcome-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 48px 24px 32px;
  gap: 16px;
  margin: auto 0;
}
.welcome-avatar {
  width: 64px; height: 64px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  box-shadow: 0 0 0 8px var(--primary-dim), 0 0 48px var(--primary-glow);
  flex-shrink: 0;
}
.welcome-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, var(--text) 40%, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.welcome-sub {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 420px;
}

/* Suggestion chips */
.suggestion-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 8px;
}
.chip {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--surface-raised);
  border: 1px solid var(--border-mid);
  color: var(--text-secondary);
  font-family: var(--font);
  font-size: 0.825rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}
.chip:hover {
  background: var(--primary-dim);
  border-color: var(--border-strong);
  color: var(--text);
  transform: translateY(-1px);
}
.chip:active { transform: translateY(0); }

/* ── Chat Bubbles ────────────────────────────────────── */
.message-row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  animation: msg-in 0.28s cubic-bezier(0.34,1.56,0.64,1) both;
}
@keyframes msg-in {
  from { opacity: 0; transform: translateY(14px) scale(0.97); }
  to   { opacity: 1; transform: none; }
}

.message-row.user  { flex-direction: row-reverse; }
.message-row.bot   { flex-direction: row; }

.msg-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
  color: #fff;
  align-self: flex-end;
  margin-bottom: 2px;
}
.message-row.user .msg-avatar  { background: linear-gradient(135deg, var(--primary), #7ab3ff); }
.message-row.bot  .msg-avatar  { background: linear-gradient(135deg, var(--accent), #c4b5fd); }

.bubble {
  max-width: min(72%, 560px);
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  line-height: 1.72;
  word-break: break-word;
  position: relative;
}
.message-row.user  .bubble {
  background: var(--bubble-user-bg);
  border: 1px solid var(--bubble-user-bd);
  border-bottom-right-radius: var(--radius-sm);
  color: var(--text);
}
.message-row.bot   .bubble {
  background: var(--bubble-bot-bg);
  border: 1px solid var(--bubble-bot-bd);
  border-bottom-left-radius: var(--radius-sm);
  color: var(--text);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.bubble-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.message-row.user  .bubble-meta { justify-content: flex-end; }

/* ── Typing Indicator ────────────────────────────────── */
.typing-row {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  animation: msg-in 0.22s ease both;
}
.typing-bubble {
  background: var(--bubble-bot-bg);
  border: 1px solid var(--bubble-bot-bd);
  border-bottom-left-radius: var(--radius-sm);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 5px;
}
.typing-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  animation: typing-bounce 1.3s infinite ease-in-out;
}
.typing-dot:nth-child(2) { animation-delay: 0.15s; }
.typing-dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.35; }
  30%            { transform: translateY(-5px); opacity: 1; }
}

/* ── Input Area ──────────────────────────────────────── */
.input-area {
  flex-shrink: 0;
  background: rgba(7,8,15,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  padding: 14px 20px 18px;
}

.input-wrapper {
  max-width: 760px;
  margin: 0 auto;
}

.input-form {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  background: var(--surface-raised);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-xl);
  padding: 10px 10px 10px 18px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.input-form:focus-within {
  border-color: rgba(91,138,245,0.45);
  box-shadow: 0 0 0 4px rgba(91,138,245,0.1), inset 0 0 0 1px rgba(91,138,245,0.1);
}

.input-form textarea {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  resize: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9375rem;
  line-height: 1.6;
  min-height: 24px;
  max-height: 180px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-mid) transparent;
  padding: 4px 0;
  caret-color: var(--primary);
}
.input-form textarea::placeholder { color: var(--text-muted); }

/* Send button */
.send-btn {
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  background: var(--primary);
  border: none;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition), opacity var(--transition);
  box-shadow: 0 4px 16px rgba(91,138,245,0.4);
}
.send-btn:hover:not(:disabled) {
  background: #7aa2f7;
  transform: translateY(-1px);
}
.send-btn:active:not(:disabled) { transform: scale(0.95); }
.send-btn:disabled {
  background: var(--surface-hover);
  box-shadow: none;
  opacity: 0.5;
  cursor: not-allowed;
}

/* Input hint */
.input-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 10px;
  text-align: center;
  line-height: 1.5;
}
.input-hint kbd {
  font-family: var(--font);
  font-size: 0.68rem;
  font-weight: 600;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--surface-raised);
  border: 1px solid var(--border-mid);
  color: var(--text-secondary);
}

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

/* ── Sidebar overlay (mobile) ────────────────────────── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 15;
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}
.sidebar-overlay.visible { display: block; }

/* ── Scrollbar global ────────────────────────────────── */
* { scrollbar-width: thin; scrollbar-color: rgba(255,255,255,0.08) transparent; }
*::-webkit-scrollbar { width: 5px; height: 5px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 999px; }

/* ── Responsive ──────────────────────────────────────── */

/* Tablet */
@media (max-width: 900px) {
  :root { --sidebar-w: 220px; }
}

/* Mobile */
@media (max-width: 680px) {
  .sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    transform: translateX(-100%);
    z-index: 20;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open { transform: translateX(0); }

  .mobile-menu-btn { display: flex; }

  .chat-feed { padding: 20px 14px 12px; }

  .input-area { padding: 10px 12px 16px; }

  .bubble { max-width: 88%; font-size: 0.9rem; }

  .welcome-state { padding: 32px 16px 24px; }

  .suggestion-chips { gap: 6px; }

  .chip { font-size: 0.78rem; padding: 7px 13px; }
}