/* ═══════════════════════════════════════════
   TOOL-BASE — Shared framework CSS for all tools
   Uses --t-accent, --t-bg etc. generic vars
   Each tool :root maps e.g. --sp-* → --t-*
   ═══════════════════════════════════════════ */

/* ── Status Strip ── */
.tool-status-strip {}
.tool-error-bar,
.tool-processing-bar,
.tool-success-bar {
  display: none;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 1.1rem;
  border-radius: var(--t-radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.tool-error-bar.show,
.tool-processing-bar.show,
.tool-success-bar.show {
  display: flex;
  margin-bottom: 1rem;
  animation: toolSlideIn 0.3s cubic-bezier(0.16,1,0.3,1);
}
@keyframes toolSlideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.tool-bar-icon {
  flex-shrink: 0;
  font-size: 1.15rem;
  line-height: 1;
}
.tool-bar-dismiss {
  margin-left: auto;
  width: 26px; height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: rgba(0,0,0,0.08);
  color: inherit;
  font-size: 0.7rem;
  cursor: pointer;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity 0.2s, background 0.2s;
}
.tool-bar-dismiss:hover { opacity: 1; background: rgba(0,0,0,0.14); }
.tool-error-bar {
  background: var(--t-red-light, rgba(239,68,68,0.1));
  border: 1px solid rgba(239,68,68,0.2);
  color: var(--t-red, #ef4444);
}
.tool-processing-bar {
  background: var(--t-accent-light, rgba(255,107,74,0.08));
  border: 1px solid rgba(255,107,74,0.15);
  color: var(--text);
}
.tool-success-bar {
  background: var(--t-green-light, rgba(16,185,129,0.1));
  border: 1px solid rgba(16,185,129,0.2);
  color: var(--t-green, #10b981);
}

/* ── Spinner ── */
.tool-spinner {
  width: 22px;
  height: 22px;
  border: 2.5px solid var(--t-border);
  border-top-color: var(--t-accent);
  border-right-color: var(--t-accent);
  border-radius: 50%;
  animation: toolSpin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes toolSpin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════════════
   WORKSPACE — single-column → 2-col on file
   ═══════════════════════════════════════════ */
.tool-workspace {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  align-items: start;
  transition: grid-template-columns 0.4s cubic-bezier(0.16,1,0.3,1);
}
.tool-workspace.split-mode {
  grid-template-columns: 1fr 1fr;
}

/* ── Upload Column ── */
.tool-upload-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* ── Dropzone ── */
.tool-dropzone {
  position: relative;
  border: 2px dashed var(--t-border);
  border-radius: var(--t-radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.16,1,0.3,1);
  background: var(--t-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  outline: none;
  overflow: hidden;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 260px;
}
.tool-dropzone::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: radial-gradient(circle at 50% 50%, var(--t-accent-light) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s;
  pointer-events: none;
}
.tool-dropzone:hover,
.tool-dropzone:focus-visible {
  border-color: var(--t-accent);
  background: var(--t-accent-light);
  box-shadow: 0 0 0 3px var(--t-accent-glow, rgba(255,107,74,0.35)), 0 8px 32px rgba(0,0,0,0.04);
}
.tool-dropzone:hover::before,
.tool-dropzone:focus-visible::before { opacity: 1; }
.tool-dropzone.dragover {
  border-color: var(--t-accent);
  background: var(--t-accent-light);
  box-shadow: 0 0 0 4px var(--t-accent-glow, rgba(255,107,74,0.35)), 0 12px 48px rgba(255,107,74,0.12);
  transform: scale(1.015);
}
.tool-dropzone.dragover .tool-drop-ring {
  animation: toolRingPulse 0.8s ease-out infinite;
}
.tool-dropzone.has-file, .tool-dropzone.has-files {
  border-style: solid;
  border-color: var(--t-green, #10b981);
  background: var(--t-green-light, rgba(16,185,129,0.1));
  box-shadow: 0 0 0 3px var(--t-green-glow, rgba(16,185,129,0.25));
  padding: 1.5rem;
  min-height: auto;
}
.tool-dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  z-index: 1;
}
.tool-drop-icon-wrap {
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.5rem;
}
.tool-drop-icon {
  font-size: 3rem;
  line-height: 1;
  position: relative;
  z-index: 1;
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1);
}
.tool-dropzone:hover .tool-drop-icon,
.tool-dropzone.dragover .tool-drop-icon {
  transform: translateY(-4px);
}
.tool-drop-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--t-accent);
  border-right-color: var(--t-accent);
  opacity: 0;
  transition: opacity 0.35s;
}
.tool-dropzone:hover .tool-drop-ring,
.tool-dropzone:focus-visible .tool-drop-ring { opacity: 0.6; }
.tool-dropzone.dragover .tool-drop-ring {
  opacity: 1;
  border-top-color: var(--t-green, #10b981);
  border-right-color: var(--t-green, #10b981);
}
@keyframes toolRingPulse {
  0%   { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.45); opacity: 0; }
}
.tool-drop-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  margin: 0;
}
.tool-drop-sub {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin: 0;
}
.tool-file-hidden {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* ── File Badge ── */
.tool-file-badge {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--t-bg);
  border: 1px solid var(--t-border-glass);
  border-radius: var(--t-radius);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color 0.3s, box-shadow 0.3s;
  animation: toolSlideIn 0.3s cubic-bezier(0.16,1,0.3,1);
}
.tool-file-badge:hover {
  border-color: var(--t-accent);
  box-shadow: 0 4px 20px var(--t-accent-glow, rgba(255,107,74,0.35));
}
.tool-file-badge-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  min-width: 0;
}
.tool-file-badge-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  line-height: 1;
}
.tool-file-badge-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.tool-file-badge-name {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tool-file-badge-meta {
  font-size: 0.72rem;
  color: var(--text-tertiary);
  font-family: var(--t-mono, monospace);
}
.tool-file-badge-clear {
  width: 34px; height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 50%;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.tool-file-badge-clear:hover {
  border-color: var(--t-red, #ef4444);
  color: var(--t-red, #ef4444);
  background: var(--t-red-light, rgba(239,68,68,0.1));
  box-shadow: 0 2px 8px rgba(239,68,68,0.15);
}

/* ── Config Column ── */
.tool-config-col {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  padding: 1.5rem;
  background: var(--t-bg);
  border: 1px solid var(--t-border-glass);
  border-radius: var(--t-radius);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: toolSlideIn 0.35s cubic-bezier(0.16,1,0.3,1);
}

/* ── Mode Pills ── */
.tool-mode-pills {
  display: flex;
  gap: 0.5rem;
}
.tool-mode-pill {
  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.65rem 0.8rem;
  border: 1.5px solid var(--t-border);
  border-radius: 100px;
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--t-font, var(--font));
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16,1,0.3,1);
  white-space: nowrap;
}
.tool-mode-pill:hover {
  border-color: var(--t-accent);
  color: var(--t-accent);
  background: var(--t-accent-light);
  box-shadow: 0 2px 12px var(--t-accent-glow, rgba(255,107,74,0.35));
}
.tool-mode-pill.active {
  background: linear-gradient(135deg, var(--t-accent), var(--t-accent-2, #7C5CFC));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 20px var(--t-accent-glow, rgba(255,107,74,0.35));
}
.tool-mode-pill-icon { font-size: 0.9rem; }
.tool-mode-pill-text { font-weight: 600; }

/* ── Action Buttons ── */
.tool-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border: 1.5px solid var(--t-border);
  border-radius: 100px;
  background: var(--t-bg);
  color: var(--text-secondary);
  font-family: var(--t-font, var(--font));
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16,1,0.3,1);
  white-space: nowrap;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.tool-action-btn:hover:not(:disabled) {
  border-color: var(--t-accent);
  color: var(--t-accent);
  background: var(--t-accent-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 18px var(--t-accent-glow, rgba(255,107,74,0.35));
}
.tool-action-btn:active:not(:disabled) { transform: translateY(0); }
.tool-action-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.tool-action-btn.primary {
  width: 100%;
  background: linear-gradient(135deg, var(--t-accent), var(--t-accent-2, #7C5CFC));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 24px var(--t-accent-glow, rgba(255,107,74,0.35));
  font-size: 0.95rem;
  padding: 0.85rem 1.5rem;
}
.tool-action-btn.primary:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--t-accent-glow, rgba(255,107,74,0.35));
}
.tool-action-btn.primary:active:not(:disabled) { transform: translateY(0); }
.tool-action-btn.secondary {
  flex: 1;
  background: var(--t-bg);
  border: 1px solid var(--t-border-glass);
  color: var(--text);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.tool-action-btn.secondary:hover:not(:disabled) {
  background: var(--t-accent-light);
  border-color: var(--t-accent);
  color: var(--t-accent);
}
.tool-action-btn.download-btn {
  width: 100%;
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 24px rgba(16,185,129,0.3);
  font-size: 0.88rem;
  padding: 0.75rem 1.5rem;
}
.tool-action-btn.download-btn:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(16,185,129,0.4);
}
.tool-action-btn.download-all {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 24px rgba(16,185,129,0.3);
}
.tool-action-btn.download-all:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(16,185,129,0.4);
}

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media (max-width: 900px) {
  .tool-workspace.split-mode { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .tool-config-col { padding: 1.2rem; }
  .tool-dropzone { padding: 2.5rem 1.5rem; }
}

@media (max-width: 768px) {
  .tool-workspace,
  .tool-workspace.split-mode { grid-template-columns: 1fr; gap: 1rem; }
  .tool-dropzone { padding: 2rem 1rem; min-height: 200px; }
  .tool-drop-icon { font-size: 2.2rem; }
  .tool-drop-icon-wrap { width: 60px; height: 60px; }
  .tool-drop-title { font-size: 1rem; }
  .tool-drop-sub { font-size: 0.78rem; }
  .tool-config-col { padding: 1.2rem 1rem; gap: 0.75rem; }
  .tool-mode-pills { flex-direction: row; gap: 0.4rem; }
  .tool-mode-pill { padding: 0.55rem 0.7rem; font-size: 0.76rem; justify-content: center; }
  .tool-action-btn { padding: 0.65rem 1.2rem; font-size: 0.8rem; }
  .tool-action-btn.primary { padding: 0.75rem 1.2rem; font-size: 0.88rem; }
  .tool-action-btn.download-all,
  .tool-action-btn.download-btn { padding: 0.65rem 1.4rem; font-size: 0.8rem; }
  .tool-file-badge { padding: 0.6rem 0.8rem; }
  .tool-file-badge-icon { font-size: 1.3rem; }
  .tool-file-badge-name { font-size: 0.78rem; }
  .tool-file-badge-meta { font-size: 0.67rem; }
  .tool-file-badge-clear { width: 30px; height: 30px; font-size: 0.9rem; }
  .tool-error-bar,
  .tool-processing-bar,
  .tool-success-bar { font-size: 0.78rem; padding: 0.6rem 0.9rem; flex-wrap: wrap; }
  .tool-bar-dismiss { width: 24px; height: 24px; font-size: 0.65rem; }
  .tool-spinner { width: 18px; height: 18px; }
}

@media (max-width: 480px) {
  .tool-dropzone { padding: 1.5rem 1rem; min-height: 180px; }
  .tool-drop-icon { font-size: 1.8rem; }
  .tool-drop-icon-wrap { width: 48px; height: 48px; }
  .tool-drop-title { font-size: 0.88rem; }
  .tool-drop-sub { font-size: 0.72rem; }
  .tool-config-col { padding: 1rem 0.85rem; gap: 0.65rem; }
  .tool-mode-pills { flex-direction: column; gap: 0.35rem; }
  .tool-mode-pill { padding: 0.5rem 0.8rem; font-size: 0.74rem; justify-content: center; }
  .tool-mode-pill-icon { font-size: 0.8rem; }
  .tool-action-btn { padding: 0.6rem 1rem; font-size: 0.76rem; }
  .tool-action-btn.primary { padding: 0.7rem 1rem; font-size: 0.82rem; }
  .tool-action-btn.download-all,
  .tool-action-btn.download-btn { padding: 0.6rem 1.2rem; font-size: 0.78rem; }
  .tool-file-badge { padding: 0.55rem 0.7rem; }
  .tool-file-badge-icon { font-size: 1.1rem; }
  .tool-file-badge-name { font-size: 0.74rem; }
  .tool-file-badge-meta { font-size: 0.63rem; }
  .tool-file-badge-clear { width: 28px; height: 28px; font-size: 0.8rem; }
  .tool-error-bar,
  .tool-processing-bar,
  .tool-success-bar { font-size: 0.74rem; padding: 0.5rem 0.75rem; gap: 0.45rem; }
  .tool-bar-icon { font-size: 1rem; }
  .tool-bar-dismiss { width: 22px; height: 22px; font-size: 0.6rem; }
  .tool-spinner { width: 16px; height: 16px; }
}

/* ── Two-Column Layout (calculators, hash, etc.) ── */
.tool-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}
@media (max-width: 768px) {
  .tool-two-col { grid-template-columns: 1fr; }
}