:root {
  --bg: #f5f5f5;
  --text: #111111;
  --purple: #54008c;
  --purple-strong: #6500a8;
  --purple-soft: rgba(84, 0, 140, 0.78);
  --purple-panel: rgba(84, 0, 140, 0.82);
  --white: #ffffff;
  --line: rgba(84, 0, 140, 0.9);
  --panel-shadow: 0 18px 38px rgba(84, 0, 140, 0.14);
  --radius-lg: 28px;
  --max-width: 1280px;
}

@font-face {
  font-family: "Goodman";
  src: url("../fonts/Goodman-Regular.woff2") format("woff2");
  font-display: swap;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Goodman", "Trebuchet MS", "Segoe UI", sans-serif;
  min-height: 100vh;
}

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

button,
input,
textarea {
  font: inherit;
}

.page-shell {
  width: min(calc(100% - 8px), var(--max-width));
  margin: 4px auto;
}

.site-header,
.site-footer {
  background: linear-gradient(90deg, var(--purple) 0%, var(--purple-strong) 100%);
  color: var(--white);
  border-radius: 4px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(1.2rem, 2vw, 1.9rem);
}

.brand img {
  width: 34px;
  height: 34px;
}

.site-nav {
  display: flex;
  gap: clamp(14px, 2vw, 28px);
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav a {
  font-size: clamp(1rem, 1.6vw, 1.65rem);
  position: relative;
}

.site-nav a.active::after,
.site-nav a:hover::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 3px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.85);
}

.hero,
.content-panel,
.chat-panel,
.portal-panel,
.contact-panel,
.auth-card,
.tool-detail-layout,
.tool-card,
.project-card {
  border-radius: var(--radius-lg);
}

.hero {
  padding: 84px 40px 50px;
  min-height: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--white);
}

.hero h1 {
  font-size: clamp(2.7rem, 5vw, 5.1rem);
  line-height: 1.08;
  margin: 84px 0 34px;
  max-width: 900px;
}

.hero-line {
  width: min(100%, 1120px);
  height: 8px;
  background: var(--line);
  border-radius: 999px;
  margin-bottom: 40px;
}

.hero p {
  font-size: clamp(1.4rem, 2.2vw, 2.2rem);
  max-width: 930px;
  margin: 0 auto 28px;
}

.button-row,
.tag-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
}

.button-row {
  margin-bottom: 34px;
}

.primary-button,
.tool-list-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 30px;
  min-width: 170px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.primary-button,
.tool-list-button {
  background: var(--purple);
  color: var(--white);
  box-shadow: var(--panel-shadow);
}

.ghost-button {
  background: var(--white);
  color: var(--text);
  border-color: rgba(17, 17, 17, 0.28);
}

.primary-button:hover,
.tool-list-button:hover,
.ghost-button:hover {
  transform: translateY(-2px);
}

.tag {
  display: inline-flex;
  min-width: 142px;
  justify-content: center;
  padding: 7px 18px;
  border: 1px solid rgba(17, 17, 17, 0.45);
  background: var(--white);
  border-radius: 12px;
  font-size: 1.2rem;
}

.site-footer {
  margin-top: auto;
  padding: 18px 22px 12px;
}

.footer-inner {
  display: flex;
  gap: 18px;
  justify-content: space-between;
  align-items: end;
  flex-wrap: wrap;
}

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

.footer-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.95rem;
}

.section-wrap {
  background: var(--white);
  padding: 0;
  min-height: calc(100vh - 84px);
  display: flex;
  flex-direction: column;
}

.section-space {
  padding: 24px 0 40px;
}

.section-title,
.contact-form h2,
.portal-panel h1 {
  text-align: center;
  font-size: clamp(2.4rem, 4vw, 4.2rem);
  margin: 0 0 26px;
}

.section-subtitle {
  text-align: center;
  max-width: 860px;
  margin: 0 auto 38px;
  font-size: clamp(1.2rem, 2vw, 1.7rem);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 44px 56px;
}

.project-card,
.tool-card,
.content-panel,
.contact-panel,
.portal-panel,
.auth-card {
  background: var(--purple-soft);
  color: var(--white);
  padding: 28px 24px;
  box-shadow: var(--panel-shadow);
}

.project-card h3,
.tool-card h3,
.content-panel h2 {
  margin: 0 0 14px;
  font-size: clamp(1.6rem, 2vw, 2.4rem);
  line-height: 1.05;
}

.project-card p,
.tool-card p,
.content-panel p,
.content-panel li {
  margin: 0;
  font-size: 1.22rem;
}

.about-grid,
.contact-grid,
.tool-overview,
.portal-links,
.tool-detail-layout {
  display: grid;
  gap: 28px;
}

.about-grid {
  grid-template-columns: 1.1fr 0.9fr;
}

.contact-grid {
  grid-template-columns: 300px 1fr;
}

.channel-card {
  background: var(--purple);
  border-radius: 28px;
  padding: 22px 18px;
}

.channel-block + .channel-block {
  margin-top: 18px;
}

.channel-pill {
  display: inline-flex;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 1rem;
}

.social-row {
  display: flex;
  gap: 18px;
  margin-top: 18px;
}

.social-row a {
  display: inline-flex;
  width: 58px;
  height: 58px;
  border-radius: 16px;
  overflow: hidden;
}

.social-row img {
  width: 100%;
  height: 100%;
}

.form-grid {
  display: grid;
  gap: 18px 22px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.field-group.full {
  grid-column: 1 / -1;
}

.field-input,
.field-area,
.chat-input,
.auth-input,
.model-trigger {
  width: 100%;
  border: 1px solid #2b0048;
  background: var(--purple);
  color: var(--white);
  border-radius: 999px;
  padding: 14px 20px;
  outline: none;
}

.field-area {
  min-height: 170px;
  resize: vertical;
  border-radius: 22px;
}

.field-input::placeholder,
.field-area::placeholder,
.chat-input::placeholder,
.auth-input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.auth-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 540px;
  padding: 90px 20px 70px;
}

.auth-card {
  width: min(100%, 760px);
  text-align: center;
}

.auth-card h1 {
  margin: 0 0 22px;
  font-size: clamp(2.5rem, 4vw, 4rem);
}

.auth-card form {
  display: grid;
  gap: 16px;
}

.auth-card .field-group {
  text-align: left;
}

.inline-submit {
  position: relative;
}

.inline-submit .auth-input {
  padding-right: 62px;
}

.inline-submit button {
  position: absolute;
  right: 10px;
  bottom: 7px;
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font-size: 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.auth-helper {
  display: inline-flex;
  justify-content: center;
  color: var(--white);
  font-size: 1.3rem;
  margin-top: 8px;
}

.portal-panel {
  padding: 44px 34px 54px;
  min-height: 620px;
}

.portal-links {
  grid-template-columns: 1fr;
}

.tool-list-button {
  padding: 18px 28px;
  min-width: 0;
  font-size: clamp(1.5rem, 2.3vw, 2.2rem);
  border-radius: 14px;
}

.tool-overview {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
}

.tool-card {
  width: min(100%, 320px);
  min-height: 240px;
}

.tool-card img {
  width: 96px;
  height: 96px;
  margin-top: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
}

.chat-panel {
  background: #d9d9d9;
  min-height: 610px;
  padding: 26px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.chat-bubble {
  background: rgba(84, 0, 140, 0.52);
  color: var(--white);
  width: min(100%, 470px);
  padding: 20px 24px;
  border-radius: 30px;
  font-size: 1.5rem;
}

.chat-entry {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.chat-input {
  background: rgba(84, 0, 140, 0.42);
  border: none;
  font-size: 1.4rem;
}

.chat-send {
  margin-left: -58px;
  width: 48px;
  height: 48px;
  border-radius: 999px;
  border: none;
  background: transparent;
  color: var(--white);
  cursor: pointer;
  font-size: 1.5rem;
}

.tool-detail-layout {
  grid-template-columns: 250px 1fr;
  min-height: 730px;
  align-items: stretch;
}

.tool-sidebar {
  background: #d9d9d9;
  padding: 18px 14px;
  border-radius: 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.conversation-list {
  background: var(--white);
  border-radius: 18px;
  flex: 1;
  padding: 18px 14px;
}

.conversation-chip {
  display: inline-flex;
  padding: 10px 14px;
  border-radius: 10px;
  background: #ececec;
  font-size: 1rem;
}

.tool-main {
  background: var(--white);
  padding: 8px 0 0;
}

.tool-topbar {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 14px;
  padding: 0 6px 8px;
}

.mini-brand img {
  width: 28px;
  height: 28px;
}

.mini-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.portal-return {
  min-width: 150px;
  border: none;
  background: #d9d9d9;
  padding: 10px 18px;
  border-radius: 16px;
  font-size: 1.25rem;
  text-align: center;
}

.tool-main h1,
.notice-center h1 {
  text-align: center;
  font-size: clamp(2rem, 4vw, 3.8rem);
}

.tool-main h1 {
  margin: 132px auto 150px;
}

.ai-message {
  max-width: 880px;
  font-size: clamp(1.7rem, 3vw, 3rem) !important;
  line-height: 1.16;
}

.current-model {
  text-align: center;
  margin: -122px 0 98px;
  font-size: 1.05rem;
  color: rgba(17, 17, 17, 0.72);
}

.current-model strong {
  color: var(--purple);
}

.notice-center {
  display: grid;
  place-items: center;
  min-height: 520px;
  text-align: center;
}

.prompt-zone {
  width: min(100%, 820px);
  margin: 0 auto;
  position: relative;
}

.model-label {
  position: absolute;
  top: -22px;
  left: 18px;
  background: #d9d9d9;
  border-radius: 999px;
  padding: 5px 24px;
  font-size: 1rem;
}

.prompt-inner {
  position: relative;
}

.prompt-inner .chat-input {
  background: #d0d0d0;
  color: var(--white);
  border-radius: 20px;
  min-height: 48px;
  padding: 12px 220px 12px 18px;
  font-size: 1.15rem;
}

.model-picker {
  position: absolute;
  right: 12px;
  bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.model-picker img {
  width: 32px;
  height: 32px;
}

.model-dropdown {
  position: relative;
}

.model-trigger {
  min-width: 148px;
  cursor: pointer;
  background: #d0d0d0;
  color: var(--text);
  border: none;
  border-radius: 20px;
  min-height: 40px;
  padding: 8px 18px;
  font-size: 1rem;
}

.model-menu {
  position: absolute;
  left: 0;
  bottom: calc(100% + 10px);
  display: none;
  width: 190px;
  background: var(--white);
  border-radius: 18px;
  border: 1px solid rgba(17, 17, 17, 0.12);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
  overflow: hidden;
}

.model-dropdown.open .model-menu,
.open .model-menu {
  display: block;
}

.model-option {
  display: block;
  width: 100%;
  text-align: left;
  border: none;
  background: var(--white);
  padding: 12px 16px;
  cursor: pointer;
}

.model-option:hover {
  background: rgba(84, 0, 140, 0.08);
}

@media (max-width: 1024px) {
  .project-grid,
  .about-grid,
  .contact-grid,
  .tool-detail-layout,
  .tool-overview,
  .form-grid {
    grid-template-columns: 1fr;
  }
  .tool-main h1 {
    margin: 70px auto 90px;
  }

  .current-model {
    margin: -70px 0 58px;
  }

  .ai-message {
    padding: 0 18px;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(calc(100% - 4px), var(--max-width));
    margin: 2px auto;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero {
    padding: 30px 16px 26px;
    min-height: auto;
  }

  .hero h1 {
    margin-top: 40px;
  }

  .auth-card,
  .portal-panel,
  .contact-panel,
  .content-panel,
  .chat-panel {
    padding-left: 18px;
    padding-right: 18px;
  }

  .prompt-inner .chat-input {
    padding-right: 20px;
    padding-bottom: 74px;
  }

  .tool-topbar {
    padding-bottom: 20px;
  }

  .portal-return {
    min-width: 120px;
    font-size: 1.05rem;
  }

  .current-model {
    margin: -46px 0 42px;
    padding: 0 18px;
  }
}