:root {
  color-scheme: light;
  --green: #1f6b43;
  --green-dark: #184f35;
  --green-soft: #e7f0ea;
  --ink: #141816;
  --muted: #66706a;
  --line: #d9dedb;
  --paper: #fbfbf8;
  --surface: #ffffff;
  --danger: #a33a3a;
  --shadow: 0 18px 50px rgba(24, 50, 37, 0.12);
  font-family: SamsungOne, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: #eef2ef;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 0%, rgba(31, 107, 67, 0.09), transparent 28rem),
    #eef2ef;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  max-width: 1480px;
  margin: 0 auto;
  padding: 2.4rem 2rem 1.6rem;
}

.app-header h1,
.panel-heading h2 {
  margin: 0;
}

.app-header h1 {
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  letter-spacing: -0.04em;
}

.app-header p:not(.eyebrow) {
  max-width: 50rem;
  margin: 0.7rem 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-wordmark {
  color: var(--green);
  font-weight: 900;
  letter-spacing: -0.055em;
  line-height: 1;
}

.app-wordmark {
  font-size: 1.35rem;
}

.eyebrow,
.step-label {
  margin: 0 0 0.35rem;
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 440px) minmax(420px, 1fr);
  gap: 1.4rem;
  align-items: start;
  max-width: 1480px;
  margin: 0 auto;
  padding: 0 2rem 3rem;
}

.editor-panel,
.preview-panel {
  border: 1px solid rgba(31, 107, 67, 0.12);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.editor-panel {
  padding: 1.35rem;
}

.preview-panel {
  min-width: 0;
  padding: 1.35rem;
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.panel-heading h2 {
  font-size: 1.18rem;
}

.panel-heading > span,
.save-status {
  color: var(--muted);
  font-size: 0.78rem;
}

form {
  display: grid;
  gap: 0.9rem;
}

fieldset,
details {
  margin: 0;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}

legend,
summary {
  color: var(--green-dark);
  font-weight: 800;
}

legend {
  padding: 0 0.4rem;
}

summary {
  cursor: pointer;
}

label {
  display: grid;
  gap: 0.38rem;
  margin-top: 0.8rem;
}

label:first-of-type {
  margin-top: 0.35rem;
}

label > span,
label strong {
  font-size: 0.84rem;
  font-weight: 700;
}

label small {
  display: block;
  margin-top: 0.25rem;
  color: var(--muted);
  font-weight: 400;
}

input,
select {
  width: 100%;
  min-height: 44px;
  padding: 0.7rem 0.8rem;
  border: 1px solid #cfd7d2;
  border-radius: 11px;
  outline: none;
  background: #fbfcfb;
  color: var(--ink);
}

input:focus,
select:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(31, 107, 67, 0.12);
}

.switch-row {
  grid-template-columns: 1fr auto;
  align-items: center;
}

.switch-row input {
  width: 54px;
  height: 30px;
  min-height: 0;
  appearance: none;
  border: 0;
  border-radius: 99px;
  background: #cdd5d0;
  transition: background 160ms ease;
}

.switch-row input::after {
  display: block;
  width: 24px;
  height: 24px;
  margin: 3px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
  content: "";
  transition: transform 160ms ease;
}

.switch-row input:checked {
  background: var(--green);
}

.switch-row input:checked::after {
  transform: translateX(24px);
}

.stepper {
  display: grid;
  grid-template-columns: 44px 1fr 44px;
  gap: 0.5rem;
}

.stepper button {
  border: 0;
  border-radius: 11px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-size: 1.25rem;
  font-weight: 900;
}

.stepper input {
  text-align: center;
}

.text-button {
  margin-top: 1rem;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--green);
  font-weight: 800;
}

.editor-actions {
  margin-top: 1rem;
}

.button {
  min-height: 44px;
  padding: 0.75rem 1rem;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 800;
}

.button-primary {
  width: 100%;
  background: var(--green);
  color: white;
  box-shadow: 0 10px 24px rgba(31, 107, 67, 0.2);
}

.button-primary:disabled {
  cursor: wait;
  opacity: 0.6;
}

.button-ghost {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(31, 107, 67, 0.22);
  color: var(--green-dark);
}

.privacy-note {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.5;
  text-align: center;
}

.single-preview {
  display: grid;
  place-items: center;
  padding: 1rem;
  border-radius: 16px;
  background: #e6ebe7;
}

.single-preview img {
  display: block;
  width: min(100%, 760px);
  aspect-ratio: 1080 / 1536;
  border-radius: 10px;
  background: var(--paper);
  box-shadow: 0 14px 36px rgba(24, 50, 37, 0.14);
  object-fit: contain;
}

.poster-shell {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 16px;
  background: #dfe5e1;
}

.poster {
  position: absolute;
  top: 0;
  left: 0;
  width: 1080px;
  height: 1536px;
  padding: 86px 72px 70px;
  transform: scale(var(--poster-scale, 0.5));
  transform-origin: top left;
  overflow: hidden;
  background: var(--paper);
  color: #121513;
  font-family: SamsungOne, "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.poster-header {
  display: flex;
  align-items: baseline;
  gap: 30px;
  padding-bottom: 55px;
}

.poster-header h2,
.poster-header time {
  margin: 0;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.poster-header h2 {
  font-size: 80px;
}

.poster-header h2::after {
  display: inline-block;
  width: 4px;
  height: 62px;
  margin-left: 28px;
  transform: translateY(8px);
  background: #171a18;
  content: "";
}

.poster-header time {
  font-size: 62px;
}

.poster-section {
  padding: 43px 0 38px;
  border-top: 2px solid #d8ddda;
}

.poster-section.first-section {
  padding-top: 0;
  border-top: 0;
}

.poster-section h3 {
  display: flex;
  align-items: center;
  gap: 24px;
  margin: 0 0 34px;
  font-size: 46px;
  line-height: 1;
  letter-spacing: -0.03em;
}

.poster-section h3 > span,
.poster-footer > span {
  display: block;
  width: 9px;
  height: 50px;
  background: var(--green);
}

.poster-line {
  display: grid;
  grid-template-columns: 86px 1fr;
  align-items: center;
  min-height: 82px;
  margin-top: 16px;
}

.line-icon {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 3px solid var(--green);
  border-radius: 16px;
  color: var(--green);
  font-size: 26px;
  font-weight: 900;
}

.poster-line p {
  display: flex;
  align-items: baseline;
  gap: 14px;
  min-width: 0;
  margin: 0;
  font-size: 35px;
  line-height: 1.35;
}

.poster-line p i {
  display: inline-block;
  width: 2px;
  height: 32px;
  margin: 0 3px;
  transform: translateY(5px);
  background: #1c211e;
}

.poster-line p b,
.poster-line p strong {
  font-weight: 800;
}

.poster-line p b#preview-body-meta::before {
  content: "· ";
}

.status-good {
  color: var(--green);
  font-weight: 900;
}

.status-bad {
  color: var(--danger);
  font-weight: 900;
}

.result-section {
  padding-bottom: 42px;
}

.poster-footer {
  display: grid;
  grid-template-columns: 9px minmax(0, 1fr) auto;
  align-items: center;
  gap: 26px;
  padding-top: 39px;
  border-top: 2px solid #d8ddda;
}

.poster-wordmark {
  align-self: center;
  padding-left: 22px;
  font-size: 30px;
}

.poster-footer p {
  margin: 0;
  font-size: 36px;
  font-weight: 800;
  letter-spacing: 0.015em;
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 30;
  max-width: min(360px, calc(100vw - 2rem));
  padding: 0.8rem 1rem;
  transform: translateY(140%);
  border-radius: 12px;
  background: #173d2b;
  color: white;
  box-shadow: var(--shadow);
  transition: transform 180ms ease;
}

.toast.visible {
  transform: translateY(0);
}

.toast:empty {
  display: none;
}

@media (max-width: 900px) {
  .app-header {
    align-items: flex-start;
    padding: 1.5rem 1rem 1rem;
  }

  .workspace {
    grid-template-columns: 1fr;
    padding: 0 1rem 2rem;
  }

  .preview-panel {
    order: -1;
  }
}

@media (max-width: 520px) {
  .app-header {
    flex-direction: column;
    gap: 1rem;
  }

  .header-actions {
    width: 100%;
    justify-content: space-between;
  }

  .editor-panel,
  .preview-panel {
    padding: 1rem;
    border-radius: 18px;
  }

  .panel-heading {
    align-items: flex-start;
  }

  .preview-panel > .panel-heading > span {
    display: none;
  }

}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}