/* ============================================================================
   TEXTFORGE — Swiss / editorial light (distinct from hub, kanban, chat)
   ============================================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* Default: Light Theme (Swiss/Glass) */
  --tf-bg: #f8fafc;
  --tf-grid: rgba(0, 0, 0, 0.05);
  --tf-ink: #0a0a0a;
  --tf-muted: #64748b;
  --tf-accent: #e11d48;
  --tf-border: rgba(0, 0, 0, 0.1);
  --tf-sans: "IBM Plex Sans", system-ui, sans-serif;
  --tf-mono: "IBM Plex Mono", ui-monospace, monospace;

  /* Glass Tokens (Light) */
  --tf-surface: rgba(255, 255, 255, 0.5);
  --tf-surface-ink: rgba(0, 0, 0, 0.04);
  --tf-shard-bg: rgba(0, 0, 0, 0.02);
  --tf-shard-blur: 20px;
  --tf-glass-border: rgba(0, 0, 0, 0.12);
  --tf-nav-bg: rgba(255, 255, 255, 0.7);
  --tf-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] {
  --tf-bg: #030712;
  --tf-ink: #f8fafc;
  --tf-muted: #94a3b8;
  --tf-accent: #f43f5e;
  --tf-border: rgba(255, 255, 255, 0.1);

  /* Glass Tokens (Dark) */
  --tf-surface: rgba(15, 23, 42, 0.5);
  --tf-surface-ink: rgba(255, 255, 255, 0.02);
  --tf-shard-bg: rgba(255, 255, 255, 0.03);
  --tf-shard-blur: 32px;
  --tf-glass-border: rgba(255, 255, 255, 0.08);
  --tf-nav-bg: rgba(3, 7, 18, 0.5);
  --tf-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] body.tf-body {
  background-color: var(--tf-bg);
  color: var(--tf-ink);
}

* {
  box-sizing: border-box;
  margin: 0;
}

body.tf-body {
  min-height: 100vh;
  font-family: var(--tf-sans);
  color: var(--tf-ink);
  background-color: var(--tf-bg);
  overflow-x: hidden;
}

/* ============================================================================
   GLASS PRISM BACKGROUND
   ============================================================================ */

.tf-prism-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  background: var(--tf-bg);
}

.tf-plasma {
  position: absolute;
  width: 80vw;
  height: 80vw;
  filter: blur(120px);
  opacity: 0.3; /* Increased for light mode */
  border-radius: 50%;
  z-index: 1;
  mix-blend-mode: multiply; /* Works best on light themes */
}

[data-theme="dark"] .tf-plasma { 
  opacity: 0.25; 
  mix-blend-mode: plus-lighter; /* Works best on dark themes */
}

.tf-plasma--1 {
  top: -10%;
  left: -20%;
  background: radial-gradient(circle, var(--tf-accent) 0%, transparent 70%);
  animation: plasmaMove 25s infinite alternate linear;
}

.tf-plasma--2 {
  bottom: -10%;
  right: -20%;
  background: radial-gradient(circle, #3b82f6 0%, transparent 70%);
  animation: plasmaMove 35s infinite alternate-reverse linear;
  animation-delay: -5s;
}

@keyframes plasmaMove {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(10%, 5%) scale(1.1); }
  100% { transform: translate(-5%, 15%) scale(0.9); }
}

.tf-shard {
  position: absolute;
  z-index: 2;
  background: var(--tf-shard-bg);
  backdrop-filter: blur(var(--tf-shard-blur));
  -webkit-backdrop-filter: blur(var(--tf-shard-blur));
  border: 1px solid var(--tf-glass-border);
  animation: shardFloat 20s ease-in-out infinite alternate;
  transform-origin: center;
  box-shadow: inset 0 0 40px rgba(255, 255, 255, 0.05);
}

.tf-shard--1 {
  width: 50vw;
  height: 50vw;
  top: -5%;
  left: -5%;
  clip-path: polygon(25% 0%, 100% 25%, 75% 100%, 0% 75%);
  opacity: 0.8;
}

.tf-shard--2 {
  width: 45vw;
  height: 45vw;
  bottom: -5%;
  right: -5%;
  clip-path: polygon(0% 15%, 85% 0%, 100% 85%, 15% 100%);
  animation-delay: -5s;
  animation-duration: 25s;
}

@keyframes shardFloat {
  0% { transform: translate3d(0, 0, 0) rotate(0deg); }
  100% { transform: translate3d(2%, 2%, 0) rotate(5deg); }
}

.tf-top {
  border-bottom: 1px solid var(--tf-shard-border);
  background: var(--tf-nav-bg);
  backdrop-filter: blur(25px);
  -webkit-backdrop-filter: blur(25px);
  position: sticky;
  top: 0;
  z-index: 50;
  transition: background 0.3s ease;
}

.tf-top-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: space-between;
}

@media (max-width: 768px) {
  .tf-top-inner {
    padding: 14px 10px;
    flex-direction: column;
    gap: 16px;
  }

  .tf-brand {
    width: 100%;
    justify-content: center;
    min-height: 36px;
  }

  .tf-exit {
    position: absolute;
    left: 14px;
    top: 14px;
  }

  .tf-nav {
    margin-left: 0;
  }
}

.tf-exit {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 2px solid var(--tf-border);
  color: var(--tf-ink);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.2s ease;
}

.tf-exit:hover {
  background: var(--tf-ink);
  color: #fff;
}

.tf-wordmark {
  font-weight: 600;
  letter-spacing: -0.03em;
  font-size: 15px;
  margin-right: 12px;
}

.tf-nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
  justify-content: center;
}

.tf-nav-link {
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--tf-muted);
  text-decoration: none;
  border: 2px solid transparent;
  transition: all 0.2s ease;
}

.tf-nav-link:hover {
  color: var(--tf-ink);
  border-color: var(--tf-border);
}

.tf-nav-link.is-on {
  color: var(--tf-ink);
  border-color: var(--tf-border);
  background: var(--tf-ink);
  color: #fff;
}

.tf-theme-toggle {
  background: none;
  border: 2px solid var(--tf-border);
  color: var(--tf-ink);
  padding: 8px 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 8px;
  transition: background 0.15s, color 0.15s;
}

.tf-theme-toggle:hover {
  background: var(--tf-ink);
  color: #fff;
}

[data-theme="dark"] .theme-icon-light {
  display: none;
}

[data-theme="light"] .theme-icon-dark {
  display: none;
}

[data-theme="dark"] .tf-panel,
[data-theme="dark"] .tf-divider,
[data-theme="dark"] .tf-tile,
[data-theme="dark"] .tf-mode,
[data-theme="dark"] .tf-opt,
[data-theme="dark"] .tf-opt select,
[data-theme="dark"] .tf-chip,
[data-theme="dark"] .tf-hist-item,
[data-theme="dark"] .tf-preset-card {
  background: var(--tf-surface);
  color: var(--tf-ink);
  border-color: var(--tf-border);
}

[data-theme="dark"] .tf-btn {
  background: #1a1a1a;
  color: var(--tf-ink);
}

[data-theme="dark"] .tf-btn:hover,
[data-theme="dark"] .tf-mode:hover,
[data-theme="dark"] .tf-nav-link:hover,
[data-theme="dark"] .tf-exit:hover {
  background: var(--tf-accent);
  color: #fff;
}

[data-theme="dark"] .tf-mode.is-active,
[data-theme="dark"] .tf-nav-link.is-on {
  background: var(--tf-accent);
  color: #fff;
  border-color: var(--tf-border);
}

[data-theme="dark"] .tf-btn-solid {
  background: var(--tf-accent);
  color: #fff;
}

[data-theme="dark"] textarea {
  background: #1a1a1a;
  color: var(--tf-ink);
}

[data-theme="dark"] ::placeholder {
  color: #525252;
}

[data-theme="dark"] .tf-docs pre {
  background: #1a1a1a;
  color: var(--tf-ink);
}

[data-theme="dark"] .tf-form-row input,
[data-theme="dark"] .tf-form-row textarea,
[data-theme="dark"] .tf-form-row select {
  background: #1a1a1a;
  color: var(--tf-ink);
  border-color: var(--tf-border);
}

[data-theme="dark"] .tf-small-btn {
  color: var(--tf-ink);
  border-color: var(--tf-border);
}

.tf-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.tf-hero-num {
  font-family: var(--tf-mono);
  font-size: 11px;
  color: var(--tf-accent);
  margin-bottom: 12px;
}

.tf-h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  max-width: 16ch;
  line-height: 1.1;
  margin-bottom: 16px;
}

.tf-lead {
  max-width: 52ch;
  color: var(--tf-muted);
  line-height: 1.65;
  font-size: 15px;
  margin-bottom: 28px;
}

.tf-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.tf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-family: var(--tf-sans);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 2px solid var(--tf-border);
  text-decoration: none;
  cursor: pointer;
  background: #fff;
  color: var(--tf-ink);
}

.tf-btn:hover {
  background: var(--tf-ink);
  color: #fff;
}

.tf-btn-solid {
  background: var(--tf-accent);
  color: #fff;
  border-color: var(--tf-border);
}

.tf-btn-solid:hover {
  background: var(--tf-ink);
}

.tf-grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 64px;
}

.tf-tile {
  background: var(--tf-surface);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--tf-glass-border);
  padding: 32px;
  border-radius: 4px;
  box-shadow: var(--tf-shadow);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tf-tile:hover {
  transform: translateY(-8px);
  border-color: var(--tf-accent);
  background: var(--tf-surface-ink);
}

.tf-tile h3 {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.tf-tile p {
  font-size: 13px;
  color: var(--tf-muted);
  line-height: 1.55;
}

/* Studio (processing UI) */
.tf-studio-title {
  font-size: 11px;
  font-family: var(--tf-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--tf-muted);
  margin-bottom: 20px;
}

.tf-modes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tf-mode {
  padding: 12px 20px;
  border: 1px solid var(--tf-border);
  background: var(--tf-surface);
  backdrop-filter: blur(8px);
  font-family: var(--tf-sans);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all 0.2s ease;
}

.tf-mode:hover {
  background: var(--tf-surface-ink);
}

.tf-mode.is-active {
  background: var(--tf-ink);
  color: #fff;
}

.tf-options {
  margin-bottom: 14px;
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 12px;
}

.tf-opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 2px solid var(--tf-border);
  background: #fff;
}

.tf-opt label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.tf-opt select {
  font-family: var(--tf-mono);
  font-size: 12px;
  padding: 6px 10px;
  border: 2px solid var(--tf-border);
  background: #fff;
}

.tf-stats {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  font-family: var(--tf-mono);
  font-size: 11px;
  color: var(--tf-muted);
}

.tf-stats span {
  color: var(--tf-ink);
  font-weight: 500;
}

.tf-workspace {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  border: 2px solid var(--tf-border);
  background: var(--tf-border);
  margin-bottom: 24px;
}

@media (max-width: 900px) {
  .tf-workspace {
    grid-template-columns: 1fr;
  }
}

.tf-panel {
  background: #fff;
  display: flex;
  flex-direction: column;
  min-height: 280px;
}

.tf-panel-h {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 2px solid var(--tf-border);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tf-panel textarea {
  flex: 1;
  border: none;
  padding: 14px;
  font-family: var(--tf-mono);
  font-size: 13px;
  line-height: 1.55;
  resize: vertical;
  min-height: 220px;
  outline: none;
}

.tf-divider {
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  border-bottom: 2px solid var(--tf-border);
}

@media (min-width: 901px) {
  .tf-divider {
    border-bottom: none;
    border-left: 2px solid var(--tf-border);
    border-right: 2px solid var(--tf-border);
  }
}

.tf-run {
  width: 48px;
  height: 48px;
  border-radius: 999px;
  border: 2px solid var(--tf-border);
  background: var(--tf-accent);
  color: #fff;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.tf-run:hover {
  filter: brightness(1.3);
  transform: scale(1.1);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.tf-run:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.tf-output {
  flex: 1;
  padding: 14px;
  font-family: var(--tf-mono);
  font-size: 13px;
  line-height: 1.55;
  overflow: auto;
  min-height: 220px;
}

.tf-placeholder {
  color: var(--tf-muted);
  text-align: center;
  padding: 40px 20px;
}

.tf-loading {
  text-align: center;
  padding: 40px;
  color: var(--tf-muted);
}

.tf-spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--tf-grid);
  border-top-color: var(--tf-ink);
  border-radius: 50%;
  animation: tfspin 0.7s linear infinite;
  margin: 0 auto 12px;
}

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

.tf-result {
  white-space: pre-wrap;
}

.tf-error {
  color: var(--tf-accent);
}

.tf-small-btn {
  background: none;
  border: 2px solid var(--tf-border);
  padding: 6px 12px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  cursor: pointer;
}

.tf-small-btn:hover {
  background: var(--tf-ink);
  color: #fff;
}

.tf-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.tf-chip {
  padding: 8px 12px;
  border: 2px solid var(--tf-border);
  background: #fff;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

.tf-chip:hover {
  box-shadow: 3px 3px 0 var(--tf-ink);
}

.tf-history-block {
  margin-top: 40px;
  border-top: 2px solid var(--tf-border);
  padding-top: 24px;
}

.tf-history-block h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.tf-history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.tf-hist-item {
  border: 2px solid var(--tf-border);
  padding: 12px 14px;
  background: var(--tf-bg);
  font-size: 12px;
}

.tf-docs h2 {
  font-size: 14px;
  margin: 28px 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.tf-docs pre {
  font-family: var(--tf-mono);
  font-size: 12px;
  padding: 16px;
  border: 2px solid var(--tf-border);
  background: var(--tf-bg);
  overflow-x: auto;
  line-height: 1.5;
  margin-bottom: 12px;
}

.tf-docs p,
.tf-docs li {
  font-size: 14px;
  color: var(--tf-muted);
  line-height: 1.6;
  max-width: 65ch;
}

.tf-docs ul {
  margin: 8px 0 8px 20px;
}

.tf-form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 14px;
}

.tf-form-row label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
}

.tf-form-row input,
.tf-form-row textarea,
.tf-form-row select {
  padding: 10px 12px;
  border: 2px solid var(--tf-border);
  font-family: var(--tf-mono);
  font-size: 13px;
}

.tf-preset-card {
  border: 2px solid var(--tf-border);
  padding: 16px;
  margin-bottom: 10px;
  background: var(--tf-bg);
}

.tf-preset-card h4 {
  font-size: 13px;
  margin-bottom: 6px;
}

.tf-preset-card p {
  font-size: 12px;
  color: var(--tf-muted);
}

/* ============================================================
   REDUCED MOTION
   Honour the OS "reduce motion" setting. Animations are cut to a
   near-zero duration rather than removed, so rules that animate
   FROM opacity:0 still land on their final visible state.
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}