/* vrc.dj  FAQ: FAQ page */
/* =======================================================================
   FAQ page
   ======================================================================= */

/* --- Hero */
.faq-page { padding-bottom: 5rem; }
.faq-hero {
  position: relative;
  text-align: center;
  padding: 5rem 0 3rem;
  overflow: hidden;
}
.faq-hero-glow {
  position: absolute; inset: 0; pointer-events: none;
}
.faq-hero-glow::before {
  content: '';
  position: absolute;
  width: 60vmax; height: 60vmax; border-radius: 50%;
  top: -30vmax; left: 50%; transform: translateX(-50%);
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 16%, transparent) 0%, transparent 70%);
  animation: glowDrift 12s ease-in-out infinite alternate;
}
.faq-hero-title {
  font-size: clamp(2.2rem, 7vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -.035em;
  line-height: 1.05;
  color: var(--white);
  margin-bottom: 1rem;
}
.faq-hero-sub {
  font-size: clamp(.95rem, 2.3vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 440px;
  margin: 0 auto;
  line-height: 1.6;
}

/* --- Accordion list */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem 0 2rem;
}

/* --- Item card */
.faq-item {
  background: color-mix(in srgb, var(--bg-card) 60%, transparent);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.faq-item:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  box-shadow: 0 0 20px color-mix(in srgb, var(--accent) 8%, transparent);
}

/* --- Question button */
.faq-question {
  display: flex;
  align-items: center;
  gap: .75rem;
  width: 100%;
  padding: 1.15rem 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  color: var(--white);
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.35;
  transition: background .18s var(--ease);
}
.faq-question:hover {
  background: color-mix(in srgb, var(--accent) 5%, transparent);
}
.faq-question-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.2rem; height: 2.2rem;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent-bright);
  font-size: 1rem;
}
.faq-question-text { flex: 1; }
.faq-chevron {
  flex-shrink: 0;
  font-size: .8rem;
  color: var(--text-muted);
  transition: transform .3s var(--ease);
}
[aria-expanded="true"] .faq-chevron {
  transform: rotate(180deg);
}

/* --- Answer body */
.faq-answer {
  padding: 0 1.25rem 1.25rem;
  padding-left: calc(1.25rem + 2.2rem + .75rem); /* align with question text */
  color: var(--text-secondary);
  font-size: .92rem;
  line-height: 1.7;
}
.faq-answer p { margin: 0 0 .75rem; }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-answer strong { color: var(--white); }
.faq-answer code {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  padding: .15em .4em;
  border-radius: 4px;
  font-size: .85em;
}

/* --- Diagram (vrc.dj vs vrc.to) */
.faq-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: 1.5rem 0;
  padding: 2rem 1rem;
  background: color-mix(in srgb, var(--bg-elevated) 50%, transparent);
  border-radius: 14px;
  border: 1px solid var(--border);
  overflow: hidden;
}

.faq-diagram-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
  z-index: 1;
}
.faq-diagram-node-icon {
  width: 3.5rem; height: 3.5rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  border: 2px solid;
  transition: box-shadow .3s var(--ease);
}
.faq-diagram-node--dj .faq-diagram-node-icon {
  background: color-mix(in srgb, #7c3aed 15%, transparent);
  border-color: color-mix(in srgb, #7c3aed 50%, transparent);
  color: #a78bfa;
  box-shadow: 0 0 16px color-mix(in srgb, #7c3aed 20%, transparent);
}
.faq-diagram-node--to .faq-diagram-node-icon {
  background: color-mix(in srgb, #0ea5e9 15%, transparent);
  border-color: color-mix(in srgb, #0ea5e9 50%, transparent);
  color: #38bdf8;
  box-shadow: 0 0 16px color-mix(in srgb, #0ea5e9 20%, transparent);
}
.faq-diagram-node-domain {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--white);
  letter-spacing: -.01em;
}
.faq-diagram-node-label {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
}

/* Bridge + lines */
.faq-diagram-bridge {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
  gap: 0;
}
.faq-diagram-line {
  flex: 1;
  height: 2px;
  min-width: 20px;
  position: relative;
  overflow: hidden;
}
.faq-diagram-line::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, var(--accent) 0, var(--accent) 6px, transparent 6px, transparent 12px);
  opacity: .4;
}
.faq-diagram-line::after {
  content: '';
  position: absolute;
  top: -1px; bottom: -1px;
  width: 24px;
  border-radius: 2px;
  background: var(--accent);
  box-shadow: 0 0 8px color-mix(in srgb, var(--accent) 50%, transparent);
  animation: faqLineFlow 2s linear infinite;
}
.faq-diagram-line--left::after  { animation-name: faqLineFlowRight; }
.faq-diagram-line--right::after { animation-name: faqLineFlowLeft; }

@keyframes faqLineFlowRight {
  0%   { left: -24px; }
  100% { left: 100%; }
}
@keyframes faqLineFlowLeft {
  0%   { right: -24px; left: auto; }
  100% { right: 100%; left: auto; }
}

/* Center node */
.faq-diagram-center {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
  z-index: 1;
}
.faq-diagram-center-ring {
  width: 3rem; height: 3rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border: 2px solid color-mix(in srgb, var(--accent) 60%, transparent);
  box-shadow:
    0 0 20px color-mix(in srgb, var(--accent) 25%, transparent),
    0 0 40px color-mix(in srgb, var(--accent) 10%, transparent);
  animation: faqCenterPulse 3s ease-in-out infinite;
}
.faq-diagram-center-label {
  font-size: .65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent-bright);
  white-space: nowrap;
}

@keyframes faqCenterPulse {
  0%, 100% { box-shadow: 0 0 20px color-mix(in srgb, var(--accent) 25%, transparent), 0 0 40px color-mix(in srgb, var(--accent) 10%, transparent); transform: scale(1); }
  50%      { box-shadow: 0 0 28px color-mix(in srgb, var(--accent) 40%, transparent), 0 0 56px color-mix(in srgb, var(--accent) 18%, transparent); transform: scale(1.08); }
}

/* --- Steps (how to create a profile) */
.faq-steps {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  margin: .5rem 0;
}
.faq-step {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
}
.faq-step-num {
  flex-shrink: 0;
  width: 2rem; height: 2rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: .85rem;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1.5px solid color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--accent-bright);
}
.faq-step-body {
  display: flex;
  flex-direction: column;
  gap: .15rem;
  padding-top: .2rem;
}
.faq-step-body strong { color: var(--white); font-size: .95rem; }
.faq-step-body span { color: var(--text-secondary); font-size: .88rem; line-height: 1.55; }
.faq-step-body code {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  padding: .1em .35em;
  border-radius: 4px;
  font-size: .82em;
}

/* --- Mobile: stack diagram vertically */
@media (max-width: 580px) {
  .faq-diagram {
    flex-direction: column;
    gap: 0;
    padding: 1.5rem 1rem;
  }
  .faq-diagram-bridge {
    flex-direction: column;
    min-height: 80px;
    width: 2px;
    flex: 0 0 auto;
  }
  .faq-diagram-line {
    width: 2px;
    height: 0;
    flex: 1;
    min-width: unset;
    min-height: 20px;
  }
  .faq-diagram-line::before {
    background: repeating-linear-gradient(180deg, var(--accent) 0, var(--accent) 6px, transparent 6px, transparent 12px);
  }
  .faq-diagram-line::after {
    width: 4px; height: 16px;
    left: -1px; right: auto; top: auto; bottom: auto;
    animation: none;
  }
  .faq-diagram-line--left::after  { animation: faqLineFlowDown 2s linear infinite; }
  .faq-diagram-line--right::after { animation: faqLineFlowUp 2s linear infinite; }
  .faq-answer {
    padding-left: 1.25rem;
  }
}
@keyframes faqLineFlowDown {
  0%   { top: -16px; }
  100% { top: 100%; }
}
@keyframes faqLineFlowUp {
  0%   { bottom: -16px; top: auto; }
  100% { bottom: 100%; top: auto; }
}

/* --- Light theme */
[data-theme="light"] .faq-hero-title { color: var(--text); }
[data-theme="light"] .faq-question   { color: var(--text); }
[data-theme="light"] .faq-answer strong,
[data-theme="light"] .faq-step-body strong,
[data-theme="light"] .faq-diagram-node-domain { color: var(--text); }

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .faq-hero-title { color: var(--text); }
  :root:not([data-theme="dark"]) .faq-question   { color: var(--text); }
  :root:not([data-theme="dark"]) .faq-answer strong,
  :root:not([data-theme="dark"]) .faq-step-body strong,
  :root:not([data-theme="dark"]) .faq-diagram-node-domain { color: var(--text); }
}