:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-soft: #fbfcff;
  --text: #111827;
  --muted: #667085;
  --line: #e4e7ec;
  --line-strong: #d0d5dd;
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-soft: #eef2ff;
  --success-bg: #ecfdf3;
  --success-text: #067647;
  --error-bg: #fff1f3;
  --error-text: #b42318;
  --notice-bg: #eff6ff;
  --notice-text: #175cd3;
  --warning-bg: #fffaeb;
  --warning-text: #b54708;
  --shadow: 0 18px 50px rgba(17, 24, 39, 0.08);
  --shadow-soft: 0 12px 30px rgba(17, 24, 39, 0.06);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(79, 70, 229, 0.10), transparent 34rem),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 34rem);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft JhengHei", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
p {
  overflow-wrap: anywhere;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid rgba(228, 231, 236, 0.88);
  backdrop-filter: blur(16px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-weight: 800;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  border-radius: 12px;
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 10px 22px rgba(79, 70, 229, 0.24);
}

.brand-text {
  font-size: 1rem;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-text span {
  color: var(--muted);
  font-weight: 700;
}

.header-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}

.header-link,
.header-current,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--text);
  font-weight: 750;
  transition: border-color 160ms ease, color 160ms ease, transform 160ms ease, background 160ms ease;
}

.header-link:hover,
.secondary-button:hover {
  transform: translateY(-1px);
  border-color: rgba(79, 70, 229, 0.38);
  color: var(--primary);
  background: #ffffff;
}

.header-link:focus-visible {
  outline: 3px solid rgba(79, 70, 229, 0.18);
  outline-offset: 2px;
}

.header-current {
  background: var(--primary-soft);
  border-color: rgba(79, 70, 229, 0.18);
  color: var(--primary);
  cursor: default;
}

.main-content {
  min-height: calc(100vh - 158px);
}

.hero-section {
  padding: 72px 0 54px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.86fr);
  align-items: center;
  gap: 58px;
}

.hero-copy {
  max-width: 660px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.7rem, 5.6vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: 0;
}

.lead {
  max-width: 650px;
  margin: 22px 0 0;
  color: #344054;
  font-size: clamp(1.18rem, 2vw, 1.48rem);
  line-height: 1.48;
  font-weight: 650;
}

.supporting-text {
  max-width: 600px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 11px 20px;
  border: 0;
  border-radius: 999px;
  background: var(--primary);
  color: #ffffff;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(79, 70, 229, 0.22);
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.primary-button:hover {
  transform: translateY(-1px);
  background: var(--primary-dark);
  box-shadow: 0 16px 32px rgba(79, 70, 229, 0.28);
}

.primary-button:disabled {
  cursor: not-allowed;
  opacity: 0.72;
  transform: none;
}

.hero-preview {
  display: flex;
  justify-content: center;
}

.workflow-card {
  width: min(100%, 430px);
  padding: 22px;
  border: 1px solid rgba(208, 213, 221, 0.88);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.workflow-header {
  display: grid;
  gap: 4px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.workflow-kicker {
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.workflow-header strong {
  color: var(--text);
  font-size: 1.25rem;
  line-height: 1.3;
}

.workflow-steps {
  display: grid;
  gap: 0;
  padding-top: 18px;
}

.workflow-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

.workflow-icon {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 900;
}

.workflow-step strong {
  display: block;
  color: var(--text);
  font-size: 1.02rem;
}

.workflow-step p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.workflow-connector {
  width: 2px;
  height: 24px;
  margin: 6px 0 6px 22px;
  border-radius: 999px;
  background: #d9def8;
}

.preview-window {
  width: min(100%, 430px);
  padding: 16px;
  border: 1px solid rgba(208, 213, 221, 0.88);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.preview-toolbar {
  height: 30px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 4px;
}

.preview-toolbar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #d0d5dd;
}

.preview-toolbar span:first-child {
  background: #f97316;
}

.preview-toolbar span:nth-child(2) {
  background: #facc15;
}

.preview-toolbar span:nth-child(3) {
  background: #22c55e;
}

.preview-document {
  margin-top: 8px;
  padding: 24px;
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(79, 70, 229, 0.08), transparent 42%),
    #ffffff;
  border: 1px solid var(--line);
}

.document-badge {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.86rem;
  font-weight: 850;
}

.document-lines {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.line {
  height: 10px;
  border-radius: 999px;
  background: #e4e7ec;
}

.line.wide {
  width: 88%;
}

.line.medium {
  width: 68%;
}

.line.short {
  width: 46%;
}

.progress-list {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.progress-item {
  display: grid;
  gap: 8px;
}

.progress-item span {
  color: #475467;
  font-size: 0.88rem;
  font-weight: 760;
}

.progress-item strong {
  display: block;
  height: 9px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), #2563eb);
}

.preview-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.preview-tags span {
  padding: 7px 11px;
  border-radius: 999px;
  background: #ffffff;
  border: 1px solid var(--line);
  color: #344054;
  font-size: 0.84rem;
  font-weight: 760;
}

.tools-section {
  padding: 40px 0 34px;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 12px;
}

.section-heading h2,
.reminder-card h2,
.page-heading h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(1.8rem, 3vw, 2.45rem);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-heading p,
.page-heading p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.tool-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.spec-note {
  display: inline-flex;
  margin: 0 0 22px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: #475467;
  font-size: 0.94rem;
}

.tool-card {
  min-height: 118px;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-soft);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.tool-card:hover {
  transform: translateY(-3px);
  border-color: rgba(79, 70, 229, 0.42);
  box-shadow: 0 18px 42px rgba(17, 24, 39, 0.10);
}

.tool-icon {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 1.28rem;
  font-weight: 900;
}

.tool-copy {
  display: grid;
  gap: 5px;
  min-width: 0;
}

.tool-copy strong {
  color: var(--text);
  font-size: 1.08rem;
  line-height: 1.25;
}

.tool-copy small {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

.tool-arrow {
  color: var(--primary);
  font-size: 0.92rem;
  font-weight: 850;
  white-space: nowrap;
}

.reminder-section {
  padding: 20px 0 72px;
}

.reminder-card {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #ffffff;
  box-shadow: var(--shadow-soft);
}

.reminder-card p:last-child {
  margin: 0;
  color: #475467;
}

.disclaimer-section {
  padding: 26px 0 14px;
}

.disclaimer-card {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 30px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(135deg, #ffffff 0%, #f8faff 100%);
  box-shadow: var(--shadow-soft);
}

.disclaimer-heading h2 {
  margin: 0;
  font-size: clamp(1.65rem, 2.8vw, 2.2rem);
  line-height: 1.18;
  letter-spacing: 0;
}

.disclaimer-content {
  display: grid;
  gap: 12px;
}

.disclaimer-content p {
  margin: 0;
  color: #475467;
}

.tool-notice,
.unlock-warning {
  width: min(760px, calc(100% - 32px));
  margin: -46px auto 64px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #f9fafb;
  color: #475467;
}

.tool-notice strong,
.unlock-warning strong {
  display: block;
  margin-bottom: 6px;
  color: var(--text);
  font-size: 0.96rem;
}

.tool-notice p,
.unlock-warning p {
  margin: 0;
  font-size: 0.94rem;
}

.unlock-warning {
  margin: 0 auto 18px;
  border-color: #fedf89;
  background: #fffaeb;
  color: #93370d;
}

.unlock-warning strong {
  color: #7a2e0e;
}

.unlock-warning p + p {
  margin-top: 6px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #ffffff;
  color: var(--muted);
}

.footer-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 0.94rem;
}

.footer-brand {
  display: grid;
  gap: 4px;
}

.footer-brand strong {
  color: var(--text);
  font-size: 0.96rem;
}

.footer-brand span {
  color: var(--muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 16px;
  font-weight: 800;
}

.footer-links a {
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--primary);
}

.page-heading {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto 24px;
  padding-top: 46px;
}

.tool-form {
  display: grid;
  gap: 18px;
  width: min(760px, calc(100% - 32px));
  margin: 0 auto 64px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
}

.upload-box {
  display: grid;
  gap: 8px;
  padding: 22px;
  border: 2px dashed #b8c0d8;
  border-radius: 18px;
  background: var(--surface-soft);
  cursor: pointer;
}

.upload-box:focus-within {
  border-color: var(--primary);
  outline: 3px solid rgba(79, 70, 229, 0.16);
}

.upload-title {
  font-size: 1.08rem;
  font-weight: 820;
}

.upload-help,
.field-help,
.file-summary {
  color: var(--muted);
  font-size: 0.95rem;
}

.upload-box input[type="file"] {
  width: 100%;
  margin-top: 8px;
}

.file-summary {
  min-height: 24px;
  padding-top: 4px;
  font-weight: 720;
}

.field-group {
  display: grid;
  gap: 8px;
}

.field-group label {
  font-weight: 820;
}

input[type="text"],
input[type="password"],
select {
  width: 100%;
  min-height: 48px;
  padding: 10px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #ffffff;
  color: var(--text);
  font: inherit;
}

input:focus,
select:focus {
  border-color: var(--primary);
  outline: 3px solid rgba(79, 70, 229, 0.16);
}

.message {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto 18px;
  padding: 14px 16px;
  border-radius: 16px;
  font-weight: 720;
}

.message.success {
  background: var(--success-bg);
  color: var(--success-text);
}

.message.error {
  background: var(--error-bg);
  color: var(--error-text);
}

.message.notice {
  background: var(--notice-bg);
  color: var(--notice-text);
}

.message.warning {
  background: var(--warning-bg);
  color: var(--warning-text);
}

.download-panel {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto 18px;
}

.download-panel .primary-button {
  width: auto;
}

.size-result {
  width: min(760px, calc(100% - 32px));
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 0 auto 18px;
}

.size-result div {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.size-result span {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
}

.size-result strong {
  display: block;
  margin-top: 4px;
  font-size: 1.35rem;
}

@media (max-width: 920px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .hero-preview {
    justify-content: flex-start;
  }

  .tool-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(100% - 24px, 1120px);
  }

  .header-inner {
    min-height: 66px;
    align-items: flex-start;
    justify-content: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 12px 0;
  }

  .brand-text {
    font-size: 0.94rem;
    white-space: normal;
  }

  .header-nav {
    width: 100%;
    justify-content: flex-start;
    gap: 8px;
  }

  .header-link,
  .header-current {
    min-height: 38px;
    padding: 8px 11px;
    font-size: 0.9rem;
  }

  .hero-section {
    padding: 46px 0 34px;
  }

  .hero-copy h1 {
    font-size: clamp(2.35rem, 13vw, 3.35rem);
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .preview-window {
    border-radius: 22px;
  }

  .workflow-card {
    width: 100%;
    padding: 18px;
    border-radius: 22px;
  }

  .preview-document {
    padding: 18px;
    border-radius: 18px;
  }

  .tool-card {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 13px;
    min-height: 0;
    padding: 16px;
  }

  .tool-icon {
    width: 46px;
    height: 46px;
    font-size: 1.12rem;
  }

  .tool-arrow {
    grid-column: 2;
  }

  .reminder-card {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 20px;
  }

  .disclaimer-card {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px;
  }

  .page-heading {
    width: min(100% - 24px, 760px);
    padding-top: 34px;
  }

  .tool-form,
  .message,
  .download-panel,
  .size-result,
  .tool-notice,
  .unlock-warning {
    width: min(100% - 24px, 760px);
  }

  .tool-form {
    padding: 16px;
  }

  .upload-box {
    padding: 16px;
  }

  .tool-notice {
    margin-top: -46px;
    margin-bottom: 46px;
  }

  .size-result {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    min-height: 96px;
    align-items: flex-start;
    justify-content: center;
    flex-direction: column;
    padding: 18px 0;
  }

  .footer-links {
    justify-content: flex-start;
  }
}