/* ── APP SHELL ── */
.app-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  max-width: var(--max-w);
  margin: 0 auto;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--fg);
  text-decoration: none;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity 0.2s;
}

.nav-brand:hover { opacity: 0.8; }

.nav-tag {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  background: var(--bg-elevated);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 100px;
  padding: 0.3rem 0.85rem;
}

.app-main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 2rem 6rem;
}

/* ── GENERATOR LAYOUT ── */
.gen-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: flex-start;
}

/* ── INPUT PANEL ── */
.input-panel {
  position: sticky;
  top: 2rem;
}

.panel-header {
  margin-bottom: 2.5rem;
}

.panel-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.75rem;
}

.panel-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 0.75rem;
}

.panel-sub {
  color: var(--fg-muted);
  font-size: 0.95rem;
}

/* ── FORM ── */
.gen-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  position: relative;
}

.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg-muted);
  letter-spacing: 0.02em;
}

.field input,
.field textarea {
  background: var(--bg-elevated);
  border: 1.5px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  padding: 0.85rem 1.1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  resize: none;
  width: 100%;
}

.field input::placeholder,
.field textarea::placeholder {
  color: rgba(155,149,168,0.5);
}

.field input:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.char-count {
  font-size: 0.75rem;
  color: var(--fg-muted);
  text-align: right;
  margin-top: -0.25rem;
}

/* ── SUBMIT BUTTON ── */
.gen-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #0c0b0f;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.15s;
  width: 100%;
}

.gen-btn:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
}

.gen-btn:active:not(:disabled) {
  transform: translateY(0);
}

.gen-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-icon {
  font-size: 1.2rem;
  transition: transform 0.2s;
}

.gen-btn:hover:not(:disabled) .btn-icon {
  transform: translateX(4px);
}

/* ── OUTPUT PANEL ── */
.output-panel {
  min-height: 400px;
}

/* Idle state */
.output-idle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  background: var(--bg-elevated);
  border: 1.5px dashed rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  gap: 1.25rem;
}

.idle-icon {
  font-size: 2.5rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.idle-text {
  color: var(--fg-muted);
  font-size: 0.95rem;
  max-width: 24ch;
  line-height: 1.6;
}

/* Loading state */
.output-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  gap: 1.25rem;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid rgba(240,168,48,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  color: var(--fg-muted);
  font-size: 0.95rem;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* Results */
.output-results {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.result-block {
  background: var(--bg-elevated);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius);
  overflow: hidden;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: var(--bg-card);
}

.platform-badge {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
}

.platform-badge.instagram {
  background: rgba(240,168,48,0.15);
  color: var(--accent);
  border: 1px solid rgba(240,168,48,0.3);
}

.platform-badge.tiktok {
  background: rgba(224,104,64,0.15);
  color: var(--gradient-end);
  border: 1px solid rgba(224,104,64,0.3);
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  color: var(--fg-muted);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.copy-btn:hover {
  background: rgba(240,168,48,0.1);
  border-color: rgba(240,168,48,0.3);
  color: var(--accent);
}

.copy-btn.copied {
  color: #4ade80;
  border-color: rgba(74,222,128,0.3);
  background: rgba(74,222,128,0.08);
}

.copy-icon {
  font-size: 1rem;
}

.result-content {
  padding: 1.5rem 1.25rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--fg);
  white-space: pre-wrap;
  word-break: break-word;
}

/* Regenerate button */
.regen-btn {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  color: var(--fg-muted);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.85rem 1.5rem;
  cursor: pointer;
  width: 100%;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.regen-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* Error state */
.output-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  gap: 1.25rem;
  padding: 2rem;
}

.error-text {
  color: #f87171;
  font-size: 0.95rem;
  text-align: center;
  max-width: 30ch;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .gen-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .input-panel {
    position: static;
  }

  .app-main {
    padding: 2rem 1.5rem 4rem;
  }

  .app-nav {
    padding: 1rem 1.5rem;
  }
}