/* ===================================================================
   SFDA Copilot — Components
   Buttons, cards, modals, forms, FAQ, chat bubbles, input, dropdown, toast
   =================================================================== */

/* ——————————————— Buttons ——————————————— */
.btn-primary {
  --bs-btn-bg: var(--primary-color);
  --bs-btn-border-color: var(--primary-color);
  --bs-btn-hover-bg: var(--accent-color-hover);
  --bs-btn-hover-border-color: var(--accent-color-hover);
  --bs-btn-active-bg: var(--accent-color-hover);
  font-weight: 600;
}

.unified-button {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 34px;
  border: none;
  border-radius: 999px;
  font-family: var(--font-headings);
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  background: var(--gradient-brand-flow);
  background-size: 200% 200%;
  box-shadow: var(--shadow-lg), var(--shadow-warm-glow);
  cursor: pointer;
  transition: var(--btn-transition);
  animation: brandShift 8s ease infinite;
}
.unified-button:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-xl), var(--shadow-warm-glow);
}
.unified-button:active { transform: translateY(-1px) scale(.99); }

/* Ripple */
.ripple-container { position: absolute; inset: 0; overflow: hidden; border-radius: inherit; pointer-events: none; }
.ripple { position: absolute; border-radius: 50%; background: rgba(255 255 255 / 0.45); transform: scale(0); animation: rippleExpand .6s ease-out; pointer-events: none; }

/* Theme toggle */
.theme-toggle-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; padding: 0;
  border: 1px solid var(--border-color-light);
  border-radius: 50%;
  color: var(--accent-warm);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  transition: var(--btn-transition);
}
.theme-toggle-btn:hover {
  color: #fff;
  background: var(--gradient-brand-flow);
  border-color: transparent;
  transform: rotate(12deg) scale(1.08);
  box-shadow: var(--shadow-warm-glow);
}

/* Utility links on landing */
.landing-header-utility {
  position: absolute; top: 18px; right: 22px; z-index: 20;
  display: flex; align-items: center; gap: 10px;
}
.utility-icon-link {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  color: var(--text-color-dark-muted);
  background: var(--glass-bg);
  border: 1px solid var(--border-color-light);
  backdrop-filter: blur(8px);
  transition: var(--btn-transition);
}
.utility-icon-link:hover {
  color: #fff; background: var(--gradient-brand); border-color: transparent;
  transform: translateY(-2px); box-shadow: var(--shadow-brand-glow);
}

/* ——————————————— Landing hero text ——————————————— */
.hero-title-wrapper h1 {
  font-weight: 800;
  animation: titleReveal .9s var(--ease-out) both;
}
.landing-hero .lead {
  max-width: 620px; margin-inline: auto;
  color: var(--text-color-light-secondary);
  font-size: 1.15rem;
}
.hero-visual img {
  max-width: min(520px, 90%);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
}
.landing-knowledge-badge {
  padding: 5px 12px; border-radius: 999px;
  font-size: .78rem; font-weight: 600;
  color: var(--accent-link);
  background: rgba(59 130 246 / 0.12);
  border: 1px solid rgba(59 130 246 / 0.25);
}

/* ——————————————— Feature cards ——————————————— */
.why-use-platform-section h2 { color: var(--text-color-dark); }
.feature-card {
  height: 100%;
  padding: 28px 26px;
  border-radius: var(--radius-xl);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  text-align: left;
  transform-style: preserve-3d;
  transition: box-shadow var(--duration-m) ease, border-color var(--duration-m) ease;
}
.feature-card:hover { box-shadow: var(--shadow-glass-hover); border-color: var(--glass-border-subtle); }
.feature-card h3 { color: var(--text-color-dark); }
.feature-card p { color: var(--text-color-light-secondary); margin-bottom: 0; font-size: .95rem; }
.feature-icon-wrapper {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; margin-bottom: 16px;
  border-radius: var(--radius-lg);
  background: var(--gradient-brand-flow);
  box-shadow: var(--shadow-warm-glow);
}
.feature-icon { font-size: 1.6rem; color: #fff; }

/* Card reveal */
.animate-card { opacity: 0; transform: translateY(36px) scale(.96); }
.animate-card.revealed { animation: cardReveal .7s var(--ease-out) forwards; }

/* ——————————————— Modals & forms ——————————————— */
.modal-content {
  border: 1px solid var(--border-color-modal);
  border-radius: var(--radius-xl);
  background: var(--surface);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
}
.modal-header {
  background: var(--gradient-brand-flow);
  border-bottom: none;
}
.modal-header .modal-title { font-family: var(--font-headings); font-weight: 700; }
.nav-tabs { border-bottom: 1px solid var(--border-color-light); }
.nav-tabs .nav-link { color: var(--text-color-dark-muted); font-weight: 600; border: none; }
.nav-tabs .nav-link.active {
  color: var(--accent-link);
  background: transparent;
  border-bottom: 3px solid var(--accent-warm);
}
.form-control {
  background: var(--surface);
  border: 1px solid var(--border-color-medium);
  color: var(--text-color-dark);
}
.form-control:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 .25rem var(--focus-shadow-color);
}
.form-floating > label { color: var(--text-color-dark-muted); }
.form-text { color: var(--text-color-dark-muted); }

/* ——————————————— FAQ ——————————————— */
.faq-section { flex: 1; min-height: 0; overflow-y: auto; }
.faq-section h4 {
  display: flex; align-items: center;
  padding-top: 15px; margin: 20px 0 12px;
  border-top: 1px solid var(--border-color-light);
  font-size: .92rem; font-weight: 800;
  color: var(--text-color-dark);
  text-transform: uppercase; letter-spacing: .05em;
}
.faq-section h4 i { margin-right: 8px; color: var(--accent-warm); }
.faq-section .nav-pills { display: flex; flex-direction: column; gap: 8px; }
.faq-section .nav-link.faq-button {
  position: relative; overflow: hidden;
  padding: 10px 14px;
  border: 1px solid var(--border-color-light);
  border-radius: var(--radius-md);
  font-size: .88rem; font-weight: 500;
  color: var(--text-color-dark);
  text-align: left;
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  transition: all var(--duration-m) var(--ease-out);
}
.faq-section .nav-link.faq-button:hover,
.faq-section .nav-link.faq-button:focus {
  border-color: var(--accent-warm);
  box-shadow: var(--shadow-md), var(--shadow-warm-glow);
  transform: translateX(4px);
  cursor: pointer;
}
.faq-section .nav-link.faq-button.active {
  color: #fff; font-weight: 600;
  background: var(--gradient-brand-flow);
  border-color: transparent;
  box-shadow: var(--shadow-warm-glow);
  transform: none;
}
.faq-section .nav-link.faq-button:disabled {
  color: var(--text-color-dark-muted);
  background: var(--background-light-alt);
  opacity: .6; cursor: not-allowed;
}

/* ——————————————— Chat messages ——————————————— */
.message { display: flex; flex-direction: column; max-width: min(760px, 92%); }
.chatbot-message { align-self: flex-start; align-items: flex-start; }
.user-message { align-self: flex-end; align-items: flex-end; }

.message-bubble {
  position: relative;
  padding: 16px 18px;
  border-radius: var(--radius-msg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-glass);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
}
.chatbot-message .message-bubble { border-top-left-radius: 6px; }
.user-message .message-bubble {
  color: #fff;
  background: var(--gradient-brand);
  border: none;
  border-top-right-radius: 6px;
  box-shadow: var(--shadow-brand-accent);
}
.user-message .message-bubble .timestamp { color: rgba(255 255 255 / 0.8); }

.message-content p:last-child { margin-bottom: 0; }
.message-content { color: var(--text-color-dark); line-height: 1.6; }
.user-message .message-content { color: #fff; }
.message-list { padding-left: 1.2rem; }

/* Markdown tables — keep borders clearly visible */
.message-content table {
  width: 100%;
  margin: 12px 0;
  border-collapse: collapse;
  border: 1px solid var(--border-color-dark);
  border-radius: var(--radius-sm);
  overflow: hidden;
  font-size: .9rem;
}
.message-content th,
.message-content td {
  padding: 8px 12px;
  border: 1px solid var(--border-color-dark);
  text-align: left;
}
.message-content thead th {
  background: rgba(var(--accent-color-rgb) / 0.14);
  color: var(--text-color-dark);
  font-weight: 700;
}
.message-content tbody tr:nth-child(even) { background: rgba(var(--accent-warm-rgb) / 0.06); }
.user-message .message-content th,
.user-message .message-content td { border-color: rgba(255 255 255 / 0.4); }
.timestamp { margin-top: 8px; font-size: .72rem; color: var(--text-color-dark-muted); }

.message-code-block {
  padding: 12px 14px; margin: 10px 0;
  border-radius: var(--radius-sm);
  background: #0b1120; color: #e2e8f0;
  font-family: var(--font-mono); font-size: .85rem;
  overflow-x: auto;
}
.message-inline-code {
  padding: 2px 6px; border-radius: var(--radius-xs);
  background: rgba(59 130 246 / 0.12); color: var(--accent-link);
  font-family: var(--font-mono); font-size: .85em;
}
.knowledge-cutoff-notice {
  padding: 10px 12px; margin: 12px 0;
  border-left: 3px solid var(--accent-warm);
  border-radius: var(--radius-sm);
  background: rgba(100 116 139 / 0.10);
  font-size: .85rem; color: var(--text-color-light-secondary);
}

/* Suggested questions */
.suggested-questions-container { display: flex; flex-wrap: wrap; gap: 8px; }
.suggested-question-enhanced {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--accent-color);
  border-radius: 999px;
  font-size: .85rem; font-weight: 500;
  color: var(--accent-link);
  background: rgba(59 130 246 / 0.08);
  cursor: pointer;
  transition: var(--btn-transition);
}
.suggested-question-enhanced:hover {
  color: #fff; background: var(--gradient-brand-flow); border-color: transparent;
  transform: translateY(-2px); box-shadow: var(--shadow-warm-glow);
}
.suggested-question-icon { color: var(--accent-warm); }
.suggested-question-enhanced:hover .suggested-question-icon { color: #fff; }

/* Typing indicator */
.typing-indicator { display: inline-flex; gap: 6px; padding: 6px 4px; }
.typing-indicator .dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--gradient-brand-flow);
  animation: typingBounce 1.2s infinite ease-in-out;
}
.typing-indicator .dot:nth-child(2) { animation-delay: .15s; }
.typing-indicator .dot:nth-child(3) { animation-delay: .3s; }

/* ——————————————— Input area ——————————————— */
.input-area {
  position: relative; z-index: 3;
  flex-shrink: 0;
  padding: 16px clamp(12px, 4vw, 48px) 22px;
  background: var(--glass-bg);
  border-top: 1px solid var(--border-color-light);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
}
.category-selector { display: flex; align-items: center; gap: 10px; }
.category-selector .form-label { margin: 0; font-size: .85rem; font-weight: 600; color: var(--text-color-dark-muted); }

.input-group #query-input {
  border: 1px solid var(--border-color-medium);
  border-right: none;
  border-radius: 999px 0 0 999px;
  padding: 12px 18px;
  background: var(--surface);
  color: var(--text-color-dark);
}
.input-group #query-input:focus { box-shadow: none; border-color: var(--accent-color); }
#send-button {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 12px 22px;
  border: none;
  border-radius: 0 999px 999px 0;
  font-weight: 600; color: #fff;
  background: var(--gradient-brand-flow);
  background-size: 200% 200%;
  transition: var(--btn-transition);
  animation: brandShift 8s ease infinite;
}
#send-button:hover { filter: brightness(1.05); box-shadow: var(--shadow-warm-glow); }
#send-button:disabled { opacity: .6; }

/* ——————————————— Custom dropdown ——————————————— */
.custom-dropdown { position: relative; }
.custom-dropdown-trigger {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--border-color-medium);
  border-radius: 999px;
  font-size: .88rem; font-weight: 600;
  color: var(--text-color-dark);
  background: var(--surface);
  cursor: pointer;
  transition: var(--btn-transition);
}
.custom-dropdown-trigger:hover { border-color: var(--accent-warm); }
.dropdown-arrow { transition: transform var(--duration-s) ease; font-size: .75rem; }
.custom-dropdown.open .dropdown-arrow { transform: rotate(180deg); }
.custom-dropdown-menu {
  position: absolute; bottom: calc(100% + 8px); left: 0; z-index: 50;
  min-width: 220px; margin: 0; padding: 6px;
  list-style: none;
  border: 1px solid var(--border-color-light);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-xl);
  opacity: 0; visibility: hidden; transform: translateY(8px) scale(.98);
  transition: opacity var(--duration-s) ease, transform var(--duration-s) ease, visibility var(--duration-s);
}
.custom-dropdown.open .custom-dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.custom-dropdown-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: var(--radius-sm);
  font-size: .88rem; color: var(--text-color-dark); cursor: pointer;
  transition: background var(--duration-s) ease, color var(--duration-s) ease;
}
.custom-dropdown-item:hover { background: rgba(59 130 246 / 0.12); }
.custom-dropdown-item.active { color: #fff; background: var(--gradient-brand); }
.dropdown-icon { font-size: 1rem; }

/* ——————————————— Toast ——————————————— */
.toast-notification {
  position: fixed; bottom: 24px; left: 50%;
  z-index: 1080;
  max-width: min(420px, 90vw);
  padding: 14px 20px;
  border-radius: var(--radius-md);
  color: var(--toast-text);
  background: var(--toast-bg);
  box-shadow: var(--shadow-xl);
  transform: translateX(-50%);
  opacity: 1;
  transition: opacity var(--duration-m) ease, transform var(--duration-m) ease;
}
.toast-notification.hidden { opacity: 0; transform: translateX(-50%) translateY(16px); pointer-events: none; }
.toast-notification.error { border-left: 4px solid var(--color-error); }
.toast-notification.success { border-left: 4px solid var(--accent-color); }