/* ============================================================
   Atomify · v2 · isomers (page)
   ------------------------------------------------------------
   Organic-isomer generator. Relies on core.css + components.css.
   ============================================================ */

/* ─── 1 · Form layout ───────────────────────────────── */
.iso-form { display: block; }

.iso-form-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: stretch;
}
@media (max-width: 720px) {
  .iso-form-row { grid-template-columns: 1fr; }
  .iso-form-row .btn-cta { width: 100%; }
}

.iso-form-aux {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 14px;
}
.iso-hint {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}
.iso-hint sub { font-size: 0.85em; vertical-align: -0.25em; }
@media (max-width: 540px) {
  .iso-form-aux {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

/* ─── 2 · Example library ───────────────────────────── */
.iso-examples {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  overflow: hidden;
  background: var(--paper-2);
}

.iso-example {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem 1.15rem 1rem;
  min-height: 158px;
  background: var(--paper-2);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
  margin: 0;
  transition: background-color 180ms ease, transform 120ms var(--ease-soft);
}
.iso-example:hover { background: var(--paper); z-index: 2; }
.iso-example:hover .iso-example-formula { color: var(--green-deep); }
[data-theme="dark"] .iso-example:hover .iso-example-formula,
body.dark-mode .iso-example:hover .iso-example-formula { color: var(--green); }
.iso-example:active { transform: translateY(1px); }
.iso-example:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: -2px;
  z-index: 3;
}
.iso-example-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
}
.iso-example-num {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--ink-muted);
  text-transform: uppercase;
}
.iso-example-count {
  font-family: var(--font-mono);
  font-feature-settings: "tnum";
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  color: var(--green-deep);
}
[data-theme="dark"] .iso-example-count,
body.dark-mode .iso-example-count { color: var(--green); }
.iso-example-formula {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.55rem;
  letter-spacing: -0.015em;
  color: var(--ink);
  line-height: 1;
  transition: color 180ms ease;
}
.iso-example-formula sub {
  font-size: 0.6em;
  font-weight: 500;
  vertical-align: -0.18em;
}
.iso-example-name {
  font-family: var(--font-body);
  font-size: 0.82rem;
  color: var(--ink-soft);
  line-height: 1.3;
}

/* ─── 3 · Result panel ─────────────────────────────── */
.iso-panel {
  margin-top: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--r-4);
  background: var(--paper-2);
  overflow: hidden;
  animation: result-rise 0.5s var(--ease-out) both;
}
@keyframes result-rise {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.iso-panel-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  padding: 1.4rem 1.75rem;
  border-bottom: 1px solid var(--line);
  align-items: end;
}
.iso-panel-head .label-mono { display: block; margin-bottom: 0.5rem; }
.iso-formula {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--ink);
  word-break: break-word;
}
.iso-formula sub {
  font-size: 0.55em;
  font-weight: 500;
  vertical-align: -0.2em;
}
.iso-count-block {
  text-align: right;
  white-space: nowrap;
}
.iso-count {
  font-family: var(--font-mono);
  font-feature-settings: "tnum";
  font-weight: 500;
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  letter-spacing: -0.02em;
  color: var(--green-deep);
  line-height: 1;
}
[data-theme="dark"] .iso-count,
body.dark-mode .iso-count { color: var(--green); }
.iso-count-unit {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-left: 0.4rem;
  font-weight: 400;
}
.iso-count-note {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-muted);
  margin-top: 0.4rem;
}
@media (max-width: 720px) {
  .iso-panel-head { grid-template-columns: 1fr; }
  .iso-count-block { text-align: left; }
}

.iso-panel-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.75rem;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.iso-toolbar-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.iso-pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.9rem;
  border-radius: var(--r-2);
  border: 1px solid var(--line-strong);
  background: var(--paper-2);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 150ms, border-color 150ms, color 150ms;
}
.iso-pdf-btn svg { width: 14px; height: 14px; }
.iso-pdf-btn:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
[data-theme="dark"] .iso-pdf-btn:hover,
body.dark-mode .iso-pdf-btn:hover {
  background: var(--green);
  color: #0B1220;
  border-color: var(--green);
}
.iso-pdf-btn[disabled] { opacity: 0.55; cursor: not-allowed; }

/* ─── 4 · Isomer card grid ─────────────────────────── */
.iso-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0;
  background: var(--paper-2);
}

.iso-card {
  display: flex;
  flex-direction: column;
  background: var(--paper-2);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1rem 1rem 0.9rem;
  min-height: 248px;
  transition: background-color 180ms ease;
}
.iso-card:hover { background: var(--paper); }

.iso-card-num {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 0.55rem;
}
.iso-card-canvas {
  flex: 1;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 150px;
  padding: 0.4rem;
  overflow: hidden;
}
.iso-card-canvas img {
  max-width: 100%;
  max-height: 150px;
  width: auto;
  height: auto;
  background: transparent;
}
[data-theme="dark"] .iso-card-canvas,
body.dark-mode .iso-card-canvas { background: #F5F1E8; }
.iso-card-smiles {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-soft);
  margin-top: 0.6rem;
  word-break: break-all;
  line-height: 1.4;
}

@media (max-width: 540px) {
  .iso-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .iso-card { min-height: 218px; }
}

/* ─── 5 · Inline progress bar (batch loading) ────── */
.iso-progress {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1.75rem;
  border-top: 1px solid var(--line);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--ink-muted);
}
.iso-progress-bar {
  flex: 1;
  height: 4px;
  background: var(--paper-3);
  border-radius: 2px;
  overflow: hidden;
  max-width: 360px;
}
.iso-progress-bar::after {
  content: '';
  display: block;
  height: 100%;
  width: var(--progress, 0%);
  background: linear-gradient(90deg, var(--green-deep), var(--green));
  transition: width 220ms var(--ease-out);
}
[data-theme="dark"] .iso-progress-bar::after,
body.dark-mode .iso-progress-bar::after {
  background: linear-gradient(90deg, var(--green), var(--green-bright));
}
.iso-progress-num {
  font-feature-settings: "tnum";
  color: var(--ink-2);
}

/* ─── 6 · Warnings (big / complex / partial) ──────── */
.iso-warning {
  margin-top: 1.5rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--amber);
  border-radius: var(--r-4);
  background: var(--amber-tint);
  padding: 1.4rem 1.6rem;
  animation: result-rise 0.4s var(--ease-out) both;
}
.iso-warning-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.65rem;
}
.iso-warning-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 0.45rem;
}
.iso-warning-body {
  color: var(--ink-soft);
  font-size: 0.94rem;
  line-height: 1.55;
  margin: 0 0 1rem;
}
.iso-warning-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0 0 1.1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-2);
}
.iso-warning-meta dt {
  display: block;
  color: var(--ink-muted);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.2rem;
}
.iso-warning-meta dd { margin: 0; font-feature-settings: "tnum"; }
.iso-warning-actions {
  display: flex;
  gap: 0.65rem;
  flex-wrap: wrap;
}

/* ─── 7 · Educational suggestions ─────────────────── */
.iso-suggestions {
  margin-top: 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--r-4);
  background: var(--paper-2);
  overflow: hidden;
}
.iso-suggestions-head {
  padding: 1.2rem 1.6rem 0.6rem;
  border-bottom: 1px solid var(--line-soft);
}
.iso-suggestions-head .iso-warning-eyebrow {
  color: var(--ink-muted);
  margin-bottom: 0.5rem;
}
.iso-suggestions-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.1rem;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 0.3rem;
}
.iso-suggestions-sub {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin: 0 0 0.6rem;
}
.iso-level {
  border-top: 1px solid var(--line-soft);
  padding: 1rem 1.6rem 1.15rem;
}
.iso-level:first-of-type { border-top: 0; }
.iso-level-head {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 0.7rem;
}
.iso-level-name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.iso-level-rule {
  flex: 1;
  height: 1px;
  background: var(--line);
}
.iso-level-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.6rem;
}
.iso-suggestion {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--r-2);
  background: var(--paper);
  cursor: pointer;
  font-family: inherit;
  color: inherit;
  text-align: left;
  transition: background-color 150ms, border-color 150ms, transform 120ms var(--ease-soft);
}
.iso-suggestion:hover {
  background: var(--paper-2);
  border-color: var(--line-strong);
}
.iso-suggestion:active { transform: translateY(1px); }
.iso-suggestion-formula {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1;
}
.iso-suggestion-formula sub {
  font-size: 0.6em;
  font-weight: 500;
  vertical-align: -0.18em;
}
.iso-suggestion-desc {
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--ink-soft);
  line-height: 1.35;
}

/* ─── 8 · Empty/zero state for results section ────── */
.iso-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 3rem 1.5rem;
  border: 1px dashed var(--line);
  border-radius: var(--r-4);
  background: var(--paper-2);
  text-align: center;
  color: var(--ink-muted);
}
.iso-empty-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.iso-empty-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--ink-2);
}
.iso-empty-sub { font-size: 0.88rem; color: var(--ink-soft); }