/* ── Center (welcome) input ──────────────────────────────────────────────── */
.center-input-container {
  display: flex;
  flex-direction: column;
  background: var(--bg-raised);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  padding: 12px 14px 10px;
  gap: 10px;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.center-input-container:focus-within {
  border-color: rgba(74,158,255,0.4);
  box-shadow: var(--shadow-glow-blue);
}

.center-textarea {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
  min-height: 26px;
  max-height: calc(1.55em * 6 + 24px);
  overflow-y: auto;
  padding: 0 4px;
}
.center-textarea::placeholder { color: var(--text-muted); }

.center-input-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.tool-btn {
  display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  transition: color var(--transition), background var(--transition);
}
.tool-btn:hover { color: var(--text); background: var(--bg-hover); }
.tool-btn.active { color: var(--yellow); background: var(--yellow-glow); }

.send-btn-center {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--yellow); color: #111;
  margin-left: auto;
  transition: opacity var(--transition), transform var(--transition);
  flex-shrink: 0;
}
.send-btn-center:hover { opacity: 0.88; transform: scale(1.05); }
.send-btn-center:disabled { opacity: 0.4; transform: none; }

/* Attach btn beside center input */
.attach-btn-wrap {
  display: flex;
  align-items: flex-end;
}
.attach-btn {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  color: var(--text-muted);
  border: 1px solid var(--border-bright);
  transition: color var(--transition), background var(--transition);
}
.attach-btn:hover { color: var(--text); background: var(--bg-hover); }

/* ── Bottom input bar ────────────────────────────────────────────────────── */
.bottom-input-bar {
  flex-shrink: 0;
  /* Default padding; overridden by JS to account for TOS banner height */
  padding: 0 24px 56px;
}

.file-preview-row {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 0 0 8px;
  max-width: 760px; margin: 0 auto;
}

.bottom-input-wrap {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-raised);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-xl);
  padding: 8px 10px;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.bottom-input-wrap:focus-within {
  border-color: rgba(74,158,255,0.4);
  box-shadow: var(--shadow-glow-blue);
}

.attach-btn-bottom {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  color: var(--text-muted);
  border: 1px solid var(--border-bright);
  margin-bottom: 4px;
  transition: color var(--transition), background var(--transition);
}
.attach-btn-bottom:hover { color: var(--text); background: var(--bg-hover); }

.bottom-textarea-wrap {
  flex: 1; min-width: 0;
  display: flex; flex-direction: column; gap: 6px;
}

.tool-row {
  display: flex; gap: 4px;
}

.tool-btn-sm {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 9px; border-radius: var(--radius-full);
  font-size: 12px; color: var(--text-muted);
  border: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.tool-btn-sm:hover { color: var(--text); border-color: var(--border-bright); }
.tool-btn-sm.active {
  color: var(--yellow);
  border-color: rgba(229,200,70,0.3);
  background: var(--yellow-glow);
}

.bottom-textarea {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 15px;
  line-height: 1.55;
  min-height: calc(1.55em + 2px);
  max-height: calc(1.55em * 6 + 2px);
  overflow-y: auto;
  padding: 0;
}
.bottom-textarea::placeholder { color: var(--text-muted); }

.send-btn-bottom {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--yellow); color: #111;
  margin-bottom: 2px;
  transition: opacity var(--transition), transform var(--transition);
}
.send-btn-bottom:hover { opacity: 0.88; transform: scale(1.05); }
.send-btn-bottom:disabled { opacity: 0.4; transform: none; cursor: not-allowed; }
.send-btn-bottom.stop { background: var(--bg-active); color: var(--text); }

/* ── Attachment previews inside inputs ───────────────────────────────────── */
.input-file-preview-row {
  display: none;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px 4px 2px;
}

.center-input-row {
  display: flex;
  align-items: flex-end;
  gap: 6px;
}

.attach-preview-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.attach-preview-item img {
  width: 52px;
  height: 52px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  display: block;
  border: 1px solid var(--border-bright);
}

.attach-preview-remove {
  position: absolute;
  top: -5px;
  right: -5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-raised);
  border: 1px solid var(--border-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--text);
  cursor: pointer;
  z-index: 1;
  line-height: 1;
}
.attach-preview-remove:hover { background: var(--bg-hover); }

/* ── TOS banner ──────────────────────────────────────────────────────────── */
/* The banner uses position:fixed so it sits above everything.
   JS in app.js sets bottom padding on .bottom-input-bar dynamically. */
#tos-banner {
  font-size: 12px;
  color: rgba(255,255,255,0.6);
  padding: 10px;
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(780px, calc(100vw - 48px));
  text-align: center;
  background-color: var(--bg);
}
#tos-banner p {
  margin: 0;
}
#tos-banner a {
  color: rgba(255,255,255,0.85);
  text-decoration: underline;
}

/* ── Mobile: hide tool button text labels, show icons only ───────────────── */
@media (max-width: 600px) {
  .tool-btn-sm span {
    display: none;
  }
  .tool-btn-sm {
    padding: 3px 6px;
    min-width: 28px;
    justify-content: center;
  }

  /* Adjust TOS banner for mobile */
  #tos-banner {
    font-size: 11px;
    padding: 6px;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   MOBILE INPUT — Top bar chrome, TOS at bottom, no overflow
   ══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 768px) {

  /* ── Mobile top header bar (new chat + sidebar buttons) ── */
  #mobile-top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 52px;
    z-index: 90;
    transform: translateY(0);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
  }

  #mobile-top-bar.hidden-bar {
    transform: translateY(-100%);
  }

  #mobile-top-bar .mobile-bar-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
  }

  #mobile-top-bar .mobile-bar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    color: var(--text-dim);
    transition: background var(--transition), color var(--transition);
  }

  #mobile-top-bar .mobile-bar-btn:hover,
  #mobile-top-bar .mobile-bar-btn:active {
    background: var(--bg-hover);
    color: var(--text);
  }

  /* ── TOS banner: pinned to very bottom ── */
  #tos-banner {
    bottom: 0 !important;
    left: 0 !important;
    transform: none !important;
    width: 100% !important;
    font-size: 11px;
    padding: 6px 14px;
    border-top: 1px solid var(--border);
    background: var(--bg);
    z-index: 80;
    text-align: center;
  }

  /* ── Main area: padded for top bar + TOS ── */
  #main {
    padding-top: 52px;
  }

  /* ── Bottom input bar: sits just above TOS ── */
  .bottom-input-bar {
    padding: 0 12px 40px !important;
  }

  /* ── Welcome view: truly vertically centered ── */
  .welcome-view {
    padding-top: 0 !important;
    padding-bottom: 40px !important;
    justify-content: center !important;
    align-items: center !important;
    height: 100% !important;
    gap: 20px !important;
  }

  .welcome-title {
    text-align: center;
    font-size: clamp(22px, 6vw, 36px) !important;
  }

  .welcome-input-wrap {
    width: 100%;
    padding: 0 4px;
  }

  /* Input wrap: tighter on mobile */
  .bottom-input-wrap,
  .center-input-container {
    padding: 6px 8px;
  }

  /* Prevent any horizontal overflow */
  .center-input-container,
  .bottom-input-wrap {
    max-width: 100%;
  }
}

/* Desktop: never show the mobile top bar */
@media (min-width: 769px) {
  #mobile-top-bar {
    display: none !important;
  }
}