/* =============================================
   Bassets Help Center — Styles
   ============================================= */

/* --- Design Tokens --- */
:root {
  /* Brand colors */
  --color-primary: #1A5276;
  --color-primary-light: #2471A3;
  --color-primary-lighter: #EBF5FB;
  --color-primary-pale: #F0F7FC;

  /* Text */
  --color-text: #2C3E50;
  --color-text-light: #5D6D7E;
  --color-text-muted: #95A5A6;
  --color-text-on-primary: #FFFFFF;

  /* Backgrounds */
  --color-bg: #FFFFFF;
  --color-bg-soft: #F8F9FA;
  --color-bg-hero: linear-gradient(170deg, #F0F7FC 0%, #FFFFFF 50%);

  /* Borders */
  --color-border: #E5E8EB;
  --color-border-light: #F0F1F3;

  /* States */
  --color-success: #27AE60;
  --color-error: #E74C3C;
  --color-warning: #F39C12;

  /* Typography */
  --font-heading: 'Lora', Georgia, 'Times New Roman', serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Fira Code', 'Consolas', 'Monaco', monospace;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Layout */
  --max-width: 1200px;
  --chat-max-width: 860px;
  --header-height: 64px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
  --shadow-input: 0 2px 8px rgba(26, 82, 118, 0.08);
  --shadow-input-focus: 0 4px 20px rgba(26, 82, 118, 0.15);
  --shadow-card: 0 2px 8px rgba(26, 82, 118, 0.06);
  --shadow-card-hover: 0 8px 24px rgba(26, 82, 118, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease-out;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;
}


/* --- Reset & Base --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--color-primary-light);
}

img {
  max-width: 100%;
  height: auto;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
}


/* --- Accessibility --- */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-md);
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  z-index: 10000;
  font-size: 14px;
  font-weight: 600;
  transition: top var(--transition-fast);
}
.skip-link:focus {
  top: var(--space-md);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus outline for keyboard users */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}


/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}


/* =============================================
   HEADER
   ============================================= */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo {
  height: 32px;
  width: auto;
}

.header__titles {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.header__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  color: var(--color-primary);
}

.header__subtitle {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.header__nav {
  display: flex;
  align-items: center;
}

.header__link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-light);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.header__link:hover {
  color: var(--color-primary);
  background: var(--color-primary-pale);
}


/* =============================================
   HERO SECTION
   ============================================= */
.hero {
  background: var(--color-bg-hero);
  padding: var(--space-4xl) 0 var(--space-3xl);
  text-align: center;
  transition: padding var(--transition-slow), opacity var(--transition-slow);
}

.hero__container {
  max-width: 800px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: 42px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.2;
  transition: all var(--transition-slow);
}

.hero__subtitle {
  font-size: 18px;
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  line-height: 1.5;
  transition: all var(--transition-slow);
}

.hero__form {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.hero__input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.hero__input {
  width: 100%;
  height: 56px;
  padding: 0 56px 0 var(--space-lg);
  font-size: 16px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: var(--shadow-input);
  transition: all var(--transition-normal);
}
.hero__input::placeholder {
  color: var(--color-text-muted);
}
.hero__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-input-focus);
}

.hero__send-btn {
  position: absolute;
  right: 6px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.hero__send-btn:hover {
  background: var(--color-primary-light);
  transform: scale(1.05);
}
.hero__send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.hero__char-count {
  display: block;
  text-align: right;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
  padding-right: var(--space-md);
}
.hero__char-count.warning {
  color: var(--color-warning);
}
.hero__char-count.error {
  color: var(--color-error);
}

/* Hero collapsed state (chat mode) */
body.chat-mode .hero {
  padding: var(--space-lg) 0;
}
body.chat-mode .hero__title,
body.chat-mode .hero__subtitle {
  opacity: 0;
  height: 0;
  margin: 0;
  overflow: hidden;
  pointer-events: none;
}


/* =============================================
   COMMON QUERY CARDS
   ============================================= */
.cards-section {
  padding: var(--space-2xl) 0 var(--space-3xl);
  transition: opacity var(--transition-slow), max-height var(--transition-slow);
}

.cards-section__heading {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  color: inherit;
  animation: card-fade-in var(--transition-slow) both;
}
.card:nth-child(1) { animation-delay: 0ms; }
.card:nth-child(2) { animation-delay: 50ms; }
.card:nth-child(3) { animation-delay: 100ms; }
.card:nth-child(4) { animation-delay: 150ms; }
.card:nth-child(5) { animation-delay: 200ms; }
.card:nth-child(6) { animation-delay: 250ms; }
.card:nth-child(7) { animation-delay: 300ms; }
.card:nth-child(8) { animation-delay: 350ms; }

.card:hover {
  border-color: var(--color-primary-lighter);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.card:focus-visible {
  border-color: var(--color-primary);
}

.card__icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.card__icon svg {
  width: 20px;
  height: 20px;
}

.card__content {
  flex: 1;
  min-width: 0;
}

.card__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  line-height: 1.3;
}

.card__desc {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.45;
}

@keyframes card-fade-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hide cards in chat mode */
body.chat-mode .cards-section {
  display: none;
}


/* =============================================
   CHAT SECTION
   ============================================= */
.chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding-bottom: var(--space-lg);
  animation: fade-in var(--transition-normal) ease-out;
}

.chat__container {
  max-width: var(--chat-max-width);
  display: flex;
  flex-direction: column;
  flex: 1;
  position: relative;
}

.chat__messages {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-lg) 0;
  min-height: 200px;
}

/* Message bubbles */
.message {
  display: flex;
  flex-direction: column;
  animation: message-in var(--transition-normal) ease-out;
}

.message--user {
  align-items: flex-end;
}

.message--assistant {
  align-items: flex-start;
}

.message__bubble {
  max-width: 85%;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  font-size: 15px;
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.message--user .message__bubble {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border-bottom-right-radius: var(--radius-sm);
  max-width: 75%;
}

.message--assistant .message__bubble {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: var(--radius-sm);
}

/* Markdown content in assistant messages */
.message--assistant .message__bubble p {
  margin-bottom: var(--space-sm);
}
.message--assistant .message__bubble p:last-child {
  margin-bottom: 0;
}
.message--assistant .message__bubble strong {
  font-weight: 600;
}
.message--assistant .message__bubble em {
  font-style: italic;
}
.message--assistant .message__bubble code {
  background: var(--color-bg-soft);
  padding: 1px 6px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
}
.message--assistant .message__bubble pre {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  overflow-x: auto;
  margin: var(--space-sm) 0;
}
.message--assistant .message__bubble pre code {
  background: none;
  padding: 0;
}
.message--assistant .message__bubble ol,
.message--assistant .message__bubble ul {
  margin: var(--space-sm) 0 var(--space-sm) var(--space-lg);
}
.message--assistant .message__bubble li {
  margin-bottom: var(--space-xs);
}
.message--assistant .message__bubble a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Sources section */
.message__sources {
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  max-width: 85%;
}

.message__sources-toggle {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-xs) 0;
  cursor: pointer;
  transition: color var(--transition-fast);
}
.message__sources-toggle:hover {
  color: var(--color-text-light);
}
.message__sources-toggle svg {
  transition: transform var(--transition-fast);
}
.message__sources-toggle[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.message__sources-list {
  display: none;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
}
.message__sources-list.open {
  display: flex;
}

.source-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-lighter);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: var(--radius-sm);
  align-self: flex-start;
  animation: message-in var(--transition-normal) ease-out;
}
.typing-indicator span {
  width: 8px;
  height: 8px;
  background: var(--color-text-muted);
  border-radius: 50%;
  animation: typing-bounce 1.2s infinite;
}
.typing-indicator span:nth-child(2) { animation-delay: 0.15s; }
.typing-indicator span:nth-child(3) { animation-delay: 0.3s; }

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Stop generating button */
.chat__stop-btn {
  align-self: center;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-light);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: var(--space-sm);
}
.chat__stop-btn:hover {
  color: var(--color-error);
  border-color: var(--color-error);
}

/* Error / Retry */
.message__error {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  font-size: 13px;
  color: var(--color-text-muted);
}
.message__retry-btn {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-lighter);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.message__retry-btn:hover {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
}

/* Rate limit notice */
.chat__rate-limit {
  align-self: center;
  text-align: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-primary-pale);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--color-text-light);
  margin: var(--space-md) 0;
}
.chat__rate-limit strong {
  color: var(--color-primary);
}

/* Scroll to bottom button */
.chat__scroll-btn {
  position: sticky;
  bottom: 100px;
  align-self: center;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-md);
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-light);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 10;
}
.chat__scroll-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* Chat input area */
.chat__input-area {
  position: sticky;
  bottom: 0;
  background: var(--color-bg);
  padding: var(--space-md) 0;
  border-top: 1px solid var(--color-border-light);
}

.chat__form {
  position: relative;
}

.chat__input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.chat__input {
  width: 100%;
  height: 48px;
  padding: 0 48px 0 var(--space-lg);
  font-size: 15px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-bg);
  color: var(--color-text);
  transition: all var(--transition-normal);
}
.chat__input::placeholder {
  color: var(--color-text-muted);
}
.chat__input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-input-focus);
}

.chat__send-btn {
  position: absolute;
  right: 4px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}
.chat__send-btn:hover {
  background: var(--color-primary-light);
}
.chat__send-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.chat__actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
}

.chat__new-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.chat__new-btn:hover {
  color: var(--color-primary);
  background: var(--color-primary-pale);
}

.chat__char-count {
  font-size: 12px;
  color: var(--color-text-muted);
}
.chat__char-count.warning { color: var(--color-warning); }
.chat__char-count.error { color: var(--color-error); }

/* Contact card (shown when bot can't answer) */
.contact-card {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--color-primary-pale);
  border-radius: var(--radius-md);
  margin-top: var(--space-sm);
  max-width: 85%;
  font-size: 13px;
}
.contact-card a {
  font-weight: 500;
}

@keyframes message-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}


/* =============================================
   FOOTER
   ============================================= */
.footer {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: auto;
}

/* Hide footer in chat mode */
body.chat-mode .footer {
  display: none;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 20px;
  color: var(--color-primary);
}

.footer__tagline {
  font-size: 14px;
  color: var(--color-text-light);
}

.footer__links {
  display: flex;
  gap: var(--space-3xl);
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__col-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.footer__col a {
  font-size: 14px;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}
.footer__col a:hover {
  color: var(--color-primary);
}

.footer__col p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.5;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  font-size: 13px;
  color: var(--color-text-muted);
}

.footer__powered {
  font-size: 12px;
}


/* =============================================
   RESPONSIVE
   ============================================= */

/* Tablet */
@media (max-width: 1023px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__title {
    font-size: 34px;
  }

  .hero__subtitle {
    font-size: 16px;
  }

  .hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
  }
}

/* Mobile */
@media (max-width: 767px) {
  .container {
    padding: 0 var(--space-md);
  }

  .cards-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: var(--space-2xl) 0 var(--space-xl);
  }

  .hero__title {
    font-size: 28px;
  }

  .hero__subtitle {
    font-size: 15px;
  }

  .hero__input {
    height: 50px;
    font-size: 15px;
    padding: 0 50px 0 var(--space-md);
  }

  .hero__send-btn {
    width: 40px;
    height: 40px;
    right: 5px;
  }

  .message__bubble {
    max-width: 90%;
  }
  .message--user .message__bubble {
    max-width: 85%;
  }

  .header__link span {
    display: none;
  }

  .footer__links {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .card {
    padding: var(--space-md);
  }
}

/* Small mobile */
@media (max-width: 380px) {
  .hero__title {
    font-size: 24px;
  }
}


/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}