/* ============================================================
   RADIXEN — handoff/handoff.css
   Styles specific to the /handoff page.
   Builds on top of ../css/style.css
   ============================================================ */

/* ---- Page-level overrides -------------------------------- */
.page-handoff #hf-hero { padding-top: 0; }



/* ============================================================
   HERO
   ============================================================ */
#hf-hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 0 clamp(1.5rem, 5vw, 3rem);
  max-width: 100%;
  margin: 0;
}

#hf-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hf-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(29, 91, 148, 0.65) 0%, transparent 68%),
    radial-gradient(ellipse 40% 35% at 90% 80%, rgba(89, 187, 215, 0.07) 0%, transparent 60%),
    radial-gradient(ellipse 35% 30% at 5% 60%, rgba(40, 136, 194, 0.06) 0%, transparent 60%);
}

#hf-hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 200px;
  background: linear-gradient(to bottom, transparent 0%, var(--navy) 100%);
  z-index: 1;
  pointer-events: none;
}

.hf-hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.4rem;
  max-width: 760px;
}

/* Badge row */
.hf-badge-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
}

.hf-version-badge,
.hf-platform-badge,
.hf-lang-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.22rem 0.75rem;
  border-radius: 100px;
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hf-version-badge {
  background: rgba(89, 187, 215, 0.1);
  border: 1px solid rgba(89, 187, 215, 0.28);
  color: var(--cyan);
}

.hf-platform-badge {
  background: rgba(40, 136, 194, 0.08);
  border: 1px solid rgba(40, 136, 194, 0.22);
  color: rgba(252, 249, 249, 0.55);
}

.hf-platform-badge svg {
  width: 11px; height: 11px;
  stroke: rgba(89, 187, 215, 0.6);
  flex-shrink: 0;
}

.hf-lang-badge {
  background: rgba(0, 173, 216, 0.08);
  border: 1px solid rgba(0, 173, 216, 0.2);
  color: rgba(89, 187, 215, 0.7);
}

/* Title */
.hf-hero-title {
  font-family: var(--ff-mono);
  font-size: clamp(4rem, 11vw, 9rem);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 0;
  opacity: 0;
  background: linear-gradient(110deg, var(--white) 30%, var(--cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hf-hero-tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 500;
  color: rgba(252, 249, 249, 0.75);
  letter-spacing: -0.01em;
  line-height: 1.5;
  opacity: 0;
}

.hf-hero-sub {
  font-size: clamp(0.875rem, 1.5vw, 1rem);
  color: rgba(252, 249, 249, 0.42);
  max-width: 520px;
  line-height: 1.75;
  text-wrap: balance;
  opacity: 0;
}

.hf-hero-sub-em {
  font-family: var(--ff-mono);
  color: rgba(89, 187, 215, 0.8);
}

.hf-hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
}

/* Quick install command */
.hf-install-quick {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  background: rgba(23, 27, 51, 0.8);
  border: 1px solid rgba(40, 136, 194, 0.2);
  border-radius: 10px;
  padding: 0.55rem 0.9rem 0.55rem 1.1rem;
  opacity: 0;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.hf-inline-cmd {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  color: rgba(252, 249, 249, 0.55);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.hf-cmd-sep {
  color: rgba(89, 187, 215, 0.5);
}

.hf-copy-cmd {
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(89, 187, 215, 0.5);
  display: flex;
  align-items: center;
  padding: 0.25rem;
  border-radius: 5px;
  transition: color var(--transition), background var(--transition);
  flex-shrink: 0;
}

.hf-copy-cmd:hover {
  color: var(--cyan);
  background: rgba(89, 187, 215, 0.08);
}

.hf-copy-cmd svg { width: 14px; height: 14px; }

/* ============================================================
   SHARED PROSE
   ============================================================ */
.hf-prose {
  font-size: 1rem;
  color: rgba(252, 249, 249, 0.52);
  line-height: 1.8;
  max-width: 540px;
}

.hf-prose + .hf-prose { margin-top: 1rem; }

/* ============================================================
   PROBLEM SECTION
   ============================================================ */
#hf-problem {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--section-pad) clamp(1.5rem, 5vw, 3rem);
}

.hf-problem-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

/* Context bar visual */
.hf-context-bar-wrap {
  background: rgba(28, 34, 64, 0.6);
  border: 1px solid rgba(40, 136, 194, 0.18);
  border-radius: 18px;
  padding: 2rem 2rem 2.25rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  overflow: hidden;
}

.hf-context-bar-wrap::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.4;
}

.hf-context-bar-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.hf-context-bar-label-text {
  font-family: var(--ff-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(252, 249, 249, 0.35);
}

.hf-context-bar-pct {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  color: rgba(89, 187, 215, 0.75);
  transition: color 0.3s ease;
}

.hf-context-bar-pct.danger { color: #e06c75; }

.hf-context-bar-track {
  height: 6px;
  background: rgba(40, 136, 194, 0.1);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.hf-context-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--dark-blue), var(--cyan));
  transition: width 0.6s var(--ease-out), background 0.5s ease;
}

.hf-context-bar-fill.danger {
  background: linear-gradient(90deg, var(--mid-blue), #e06c75);
}

.hf-context-bar-items {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.hf-ctx-item {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  color: rgba(252, 249, 249, 0.38);
  padding: 0.35rem 0.7rem;
  background: rgba(40, 136, 194, 0.06);
  border: 1px solid rgba(40, 136, 194, 0.1);
  border-radius: 6px;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity 0.35s ease calc(var(--d) * 0.1s), transform 0.35s var(--ease-out) calc(var(--d) * 0.1s);
  letter-spacing: 0.02em;
}

.hf-ctx-item.visible {
  opacity: 1;
  transform: translateX(0);
}

.hf-context-warning {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
  padding: 0.6rem 0.85rem;
  background: rgba(224, 108, 117, 0.07);
  border: 1px solid rgba(224, 108, 117, 0.22);
  border-radius: 8px;
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  color: rgba(224, 108, 117, 0.8);
  letter-spacing: 0.05em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.4s ease, transform 0.4s var(--ease-out);
}

.hf-context-warning.visible {
  opacity: 1;
  transform: translateY(0);
}

.hf-context-warning svg { width: 14px; height: 14px; flex-shrink: 0; }

/* ============================================================
   SOLUTION SECTION
   ============================================================ */
#hf-solution {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--section-pad) clamp(1.5rem, 5vw, 3rem);
}

.hf-solution-title { margin-bottom: 4rem; }

.hf-flow-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 2rem;
  align-items: center;
}

.hf-flow-session {
  background: rgba(28, 34, 64, 0.55);
  border: 1px solid rgba(40, 136, 194, 0.18);
  border-radius: 18px;
  padding: 1.75rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.hf-flow-session::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  opacity: 0.5;
}

.hf-flow-session-a::before {
  background: linear-gradient(90deg, transparent, var(--mid-blue), transparent);
}

.hf-flow-session-b::before {
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}

.hf-flow-session-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.hf-flow-letter {
  width: 26px; height: 26px;
  background: rgba(40, 136, 194, 0.15);
  border: 1px solid rgba(40, 136, 194, 0.3);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: rgba(252, 249, 249, 0.6);
  flex-shrink: 0;
}

.hf-flow-letter-b {
  background: rgba(89, 187, 215, 0.1);
  border-color: rgba(89, 187, 215, 0.3);
  color: var(--cyan);
}

.hf-flow-session-label span:last-child {
  font-size: 0.78rem;
  font-weight: 600;
  color: rgba(252, 249, 249, 0.65);
  letter-spacing: 0.02em;
}

.hf-flow-chat {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.hf-flow-msg {
  font-size: 0.815rem;
  line-height: 1.6;
  padding: 0.6rem 0.85rem;
  border-radius: 10px;
}

.hf-flow-msg-user {
  background: rgba(40, 136, 194, 0.1);
  border: 1px solid rgba(40, 136, 194, 0.18);
  color: rgba(252, 249, 249, 0.6);
  font-style: italic;
}

.hf-flow-msg-ai {
  background: rgba(89, 187, 215, 0.06);
  border: 1px solid rgba(89, 187, 215, 0.15);
  color: rgba(252, 249, 249, 0.7);
}

.hf-flow-tick {
  color: var(--cyan);
  margin-right: 0.2em;
}

.hf-flow-id {
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  background: rgba(89, 187, 215, 0.1);
  border: 1px solid rgba(89, 187, 215, 0.22);
  border-radius: 5px;
  padding: 0.1rem 0.45rem;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.hf-flow-under-label {
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  color: rgba(252, 249, 249, 0.28);
  letter-spacing: 0.06em;
}

/* Arrow / DB in the middle */
.hf-flow-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.hf-flow-arrow-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, rgba(89, 187, 215, 0.35), transparent);
}

.hf-flow-arrow-db {
  width: 42px; height: 42px;
  background: rgba(28, 34, 64, 0.8);
  border: 1px solid rgba(89, 187, 215, 0.25);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.hf-flow-arrow-db svg {
  width: 18px; height: 18px;
  stroke: var(--cyan);
  opacity: 0.7;
}

.hf-flow-arrow-label {
  font-family: var(--ff-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(89, 187, 215, 0.45);
  white-space: nowrap;
}

/* ============================================================
   HOW IT WORKS — PRINCIPLES GRID
   ============================================================ */
#hf-how {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--section-pad) clamp(1.5rem, 5vw, 3rem);
}

.hf-principles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.hf-principle-card {
  background: rgba(28, 34, 64, 0.55);
  border: 1px solid rgba(40, 136, 194, 0.13);
  border-radius: 16px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s var(--ease-out), border-color 0.35s ease, box-shadow 0.35s ease;
}

.hf-principle-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(89, 187, 215, 0.3), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s var(--ease-out);
}

.hf-principle-card:hover {
  transform: translateY(-6px);
  border-color: rgba(89, 187, 215, 0.25);
  box-shadow: 0 20px 45px rgba(0,0,0,0.3);
}

.hf-principle-card:hover::before { transform: scaleX(1); }

.hf-principle-icon {
  width: 44px; height: 44px;
  background: rgba(40, 136, 194, 0.1);
  border: 1px solid rgba(40, 136, 194, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.hf-principle-icon svg {
  width: 19px; height: 19px;
  stroke: var(--cyan);
  opacity: 0.8;
}

.hf-principle-card:hover .hf-principle-icon {
  background: rgba(89, 187, 215, 0.14);
  border-color: rgba(89, 187, 215, 0.3);
  transform: scale(1.08);
}

.hf-principle-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 0.65rem;
}

.hf-principle-desc {
  font-size: 0.84rem;
  color: rgba(252, 249, 249, 0.44);
  line-height: 1.7;
}

.hf-principle-desc code {
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  color: rgba(89, 187, 215, 0.75);
  background: rgba(89, 187, 215, 0.07);
  padding: 0.06rem 0.35rem;
  border-radius: 4px;
}

/* ============================================================
   INSTALL SECTION
   ============================================================ */
#hf-install {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--section-pad) clamp(1.5rem, 5vw, 3rem);
}

.hf-install-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.hf-install-card--top {
  grid-column: 1 / -1;
}

.hf-install-card {
  background: rgba(28, 34, 64, 0.55);
  border: 1px solid rgba(40, 136, 194, 0.14);
  border-radius: 18px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  position: relative;
  overflow: hidden;
  transition: border-color 0.35s ease, box-shadow 0.35s ease;
}

.hf-install-card--featured {
  border-color: rgba(89, 187, 215, 0.22);
  background: rgba(28, 34, 64, 0.75);
}

.hf-install-card--featured::after {
  content: 'Recommended';
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-family: var(--ff-mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(89, 187, 215, 0.08);
  border: 1px solid rgba(89, 187, 215, 0.2);
  border-radius: 100px;
  padding: 0.18rem 0.65rem;
}

.hf-install-card:hover {
  border-color: rgba(89, 187, 215, 0.28);
  box-shadow: 0 18px 40px rgba(0,0,0,0.28);
}

.hf-install-card-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.hf-install-os-icon {
  width: 28px; height: 28px;
  opacity: 0.6;
  flex-shrink: 0;
}

.hf-install-os {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: rgba(252, 249, 249, 0.8);
  letter-spacing: -0.01em;
}

.hf-install-method {
  display: block;
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  color: rgba(89, 187, 215, 0.6);
  letter-spacing: 0.06em;
  margin-top: 0.1rem;
}

/* Code block */
.hf-code-block {
  background: rgba(15, 18, 36, 0.75);
  border: 1px solid rgba(40, 136, 194, 0.18);
  border-radius: 12px;
  overflow: hidden;
}

.hf-code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.85rem;
  border-bottom: 1px solid rgba(40, 136, 194, 0.1);
}

.hf-code-lang {
  font-family: var(--ff-mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(252, 249, 249, 0.25);
}

.hf-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(89, 187, 215, 0.45);
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  border-radius: 5px;
  padding: 0.2rem 0.5rem;
  transition: color var(--transition), background var(--transition);
}

.hf-copy-btn:hover {
  color: var(--cyan);
  background: rgba(89, 187, 215, 0.08);
}

.hf-copy-btn.copied { color: #98c379; }

.hf-copy-btn svg { width: 12px; height: 12px; flex-shrink: 0; }

.hf-code {
  display: block;
  padding: 0.9rem 1rem;
  font-family: var(--ff-mono);
  font-size: 0.76rem;
  color: rgba(252, 249, 249, 0.6);
  line-height: 1.8;
  overflow-x: auto;
  white-space: pre;
}

.hf-code-wrap { white-space: pre-wrap; word-break: break-all; }

.hf-c-prompt {
  color: rgba(89, 187, 215, 0.45);
  user-select: none;
  margin-right: 0.5em;
}

.hf-code-block-sm .hf-code { font-size: 0.68rem; padding: 0.6rem 0.85rem; line-height: 1.65; }

.hf-install-note,
.hf-install-prose {
  font-size: 0.8rem;
  color: rgba(252, 249, 249, 0.35);
  line-height: 1.65;
}

.hf-install-note code,
.hf-install-prose code {
  font-family: var(--ff-mono);
  font-size: 0.74rem;
  color: rgba(89, 187, 215, 0.65);
  background: rgba(89, 187, 215, 0.07);
  padding: 0.05rem 0.32rem;
  border-radius: 4px;
}

.hf-install-releases-btn {
  margin-top: auto;
  align-self: flex-start;
}

/* ============================================================
   COMMANDS SECTION
   ============================================================ */
#hf-commands {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--section-pad) clamp(1.5rem, 5vw, 3rem);
}

#hf-commands .section-subtitle code {
  font-family: var(--ff-mono);
  font-size: 0.85em;
  color: rgba(89, 187, 215, 0.75);
  background: rgba(89, 187, 215, 0.08);
  padding: 0.1rem 0.38rem;
  border-radius: 4px;
}

.hf-cmd-list {
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(40, 136, 194, 0.14);
  border-radius: 18px;
  overflow: hidden;
  margin-bottom: 2rem;
}

.hf-cmd-row {
  display: grid;
  grid-template-columns: 280px 1fr 120px;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid rgba(40, 136, 194, 0.1);
  transition: background 0.2s ease;
}

.hf-cmd-row:last-child { border-bottom: none; }
.hf-cmd-row:hover { background: rgba(40, 136, 194, 0.04); }

.hf-cmd-name code {
  font-family: var(--ff-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  letter-spacing: 0.03em;
}

.hf-cmd-desc {
  font-size: 0.85rem;
  color: rgba(252, 249, 249, 0.48);
  line-height: 1.6;
}

.hf-cmd-tag {
  display: inline-block;
  padding: 0.18rem 0.65rem;
  border-radius: 100px;
  font-family: var(--ff-mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: center;
}

.hf-cmd-tag--agent {
  background: rgba(89, 187, 215, 0.07);
  border: 1px solid rgba(89, 187, 215, 0.2);
  color: rgba(89, 187, 215, 0.7);
}

.hf-cmd-tag--user {
  background: rgba(40, 136, 194, 0.06);
  border: 1px solid rgba(40, 136, 194, 0.18);
  color: rgba(252, 249, 249, 0.38);
}

.hf-cmd-db-note {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  padding: 1rem 1.25rem;
  background: rgba(28, 34, 64, 0.55);
  border: 1px solid rgba(40, 136, 194, 0.12);
  border-radius: 12px;
  font-size: 0.8rem;
  color: rgba(252, 249, 249, 0.38);
  line-height: 1.6;
}

.hf-cmd-db-note svg {
  width: 16px; height: 16px;
  stroke: rgba(89, 187, 215, 0.45);
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.hf-cmd-db-note code {
  font-family: var(--ff-mono);
  font-size: 0.74rem;
  color: rgba(89, 187, 215, 0.6);
  background: rgba(89, 187, 215, 0.07);
  padding: 0.05rem 0.32rem;
  border-radius: 4px;
}

/* ============================================================
   AGENT SETUP SECTION
   ============================================================ */
#hf-agents {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--section-pad) clamp(1.5rem, 5vw, 3rem);
}

/* ---- Mode toggle ----------------------------------------- */
.hf-mode-toggle {
  display: flex;
  gap: 0.75rem;
  margin: 1.75rem 0 2rem;
  position: relative;
  background: rgba(28, 34, 64, 0.6);
  border: 1px solid rgba(40, 136, 194, 0.14);
  border-radius: 18px;
  padding: 0.5rem;
  width: fit-content;
}

.hf-mode-indicator {
  position: absolute;
  top: 0.5rem;
  left: 0.5rem;
  height: calc(100% - 1rem);
  border-radius: 13px;
  background: linear-gradient(110deg, rgba(89, 187, 215, 0.18) 0%, rgba(40, 136, 194, 0.14) 100%);
  border: 1px solid rgba(89, 187, 215, 0.28);
  pointer-events: none;
  transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1), width 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}

.hf-mode-btn {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.2rem;
  background: none;
  border: none;
  border-radius: 13px;
  padding: 0.85rem 1.25rem;
  cursor: pointer;
  font-family: var(--ff-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(252, 249, 249, 0.45);
  letter-spacing: -0.01em;
  transition: color 0.25s ease;
  text-align: left;
  min-width: 180px;
}

.hf-mode-btn svg {
  width: 1.1rem;
  height: 1.1rem;
  margin-bottom: 0.35rem;
  opacity: 0.5;
  transition: opacity 0.25s ease;
}

.hf-mode-btn--active,
.hf-mode-btn:hover {
  color: var(--white);
}

.hf-mode-btn--active svg,
.hf-mode-btn:hover svg {
  opacity: 1;
}

.hf-mode-desc {
  display: block;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.01em;
  color: rgba(252, 249, 249, 0.35);
  transition: color 0.25s ease;
}

.hf-mode-btn--active .hf-mode-desc {
  color: rgba(89, 187, 215, 0.65);
}

/* ---- Panels ---------------------------------------------- */
.hf-agents-panel {
  transform-origin: top center;
}

.hf-agents-panel--hidden {
  display: none;
}

/* ---- Skills intro note ----------------------------------- */
.hf-skills-intro {
  font-size: 0.9rem;
  color: rgba(252, 249, 249, 0.5);
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: 2rem;
}

.hf-skills-intro em {
  font-style: normal;
  font-family: var(--ff-mono);
  font-size: 0.82rem;
  color: rgba(89, 187, 215, 0.75);
  background: rgba(89, 187, 215, 0.07);
  border: 1px solid rgba(89, 187, 215, 0.15);
  border-radius: 4px;
  padding: 0.05em 0.4em;
}

/* ---- Agent skill desc ------------------------------------ */
.hf-agent-skill-desc {
  font-size: 0.78rem;
  color: rgba(252, 249, 249, 0.42);
  line-height: 1.6;
  margin: 0;
}

.hf-agent-skill-desc code {
  font-family: var(--ff-mono);
  font-size: 0.76rem;
  color: rgba(89, 187, 215, 0.8);
}

/* ---- On-demand badge variant ----------------------------- */
.hf-agent-type--skill {
  color: rgba(152, 195, 121, 0.75);
  background: rgba(152, 195, 121, 0.07);
  border-color: rgba(152, 195, 121, 0.2);
}

/* ---- Skills grid: 3-col ---------------------------------- */
.hf-skills-grid {
  grid-template-columns: repeat(3, 1fr);
}

.hf-agents-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.hf-agent-card {
  background: rgba(28, 34, 64, 0.55);
  border: 1px solid rgba(40, 136, 194, 0.14);
  border-radius: 16px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.hf-agent-card:hover {
  border-color: rgba(89, 187, 215, 0.25);
  box-shadow: 0 14px 30px rgba(0,0,0,0.22);
}

.hf-agent-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.hf-agent-name {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.hf-agent-type {
  font-family: var(--ff-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(89, 187, 215, 0.6);
  background: rgba(89, 187, 215, 0.07);
  border: 1px solid rgba(89, 187, 215, 0.18);
  border-radius: 100px;
  padding: 0.18rem 0.6rem;
}

.hf-agents-note {
  font-size: 0.84rem;
  color: rgba(252, 249, 249, 0.38);
  line-height: 1.65;
}

.hf-link {
  color: rgba(89, 187, 215, 0.7);
  text-decoration: none;
  transition: color var(--transition);
}

.hf-link:hover { color: var(--cyan); }

.hf-windows-link {
  display: block;
  margin-top: 0.65rem;
  font-size: 0.72rem;
  color: rgba(252, 249, 249, 0.28);
  text-decoration: none;
  transition: color 0.2s ease;
  letter-spacing: 0.01em;
}

.hf-windows-link:hover {
  color: rgba(252, 249, 249, 0.55);
}

/* ============================================================
   FINAL CTA
   ============================================================ */
#hf-cta {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--section-pad) clamp(1.5rem, 5vw, 3rem);
}

.hf-cta-inner {
  border-radius: 24px;
  border: 1px solid rgba(40, 136, 194, 0.2);
  text-align: center;
  padding: clamp(3.5rem, 7vw, 6rem) clamp(1.5rem, 5vw, 4rem);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hf-cta-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    rgba(28, 34, 64, 0.6),
    radial-gradient(ellipse 70% 80% at 50% -10%, rgba(29, 91, 148, 0.35) 0%, transparent 65%),
    radial-gradient(ellipse 40% 40% at 100% 100%, rgba(89, 187, 215, 0.05) 0%, transparent 60%);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: -1;
}

.hf-cta-inner::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(89, 187, 215, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(89, 187, 215, 0.022) 1px, transparent 1px);
  background-size: 42px 42px;
  z-index: -1;
}

.hf-cta-title {
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.08;
  margin-bottom: 1rem;
}

.hf-cta-sub {
  font-size: 1rem;
  color: rgba(252, 249, 249, 0.42);
  margin-bottom: 2.5rem;
  max-width: 440px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.hf-cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hf-cta-buttons .btn-primary svg {
  width: 15px; height: 15px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .hf-principles-grid { grid-template-columns: repeat(2, 1fr); }
  .hf-install-grid { grid-template-columns: 1fr; }
  .hf-install-card--featured::after { display: none; }
  .hf-skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .hf-problem-inner { grid-template-columns: 1fr; gap: 3rem; }
  .hf-flow-diagram { grid-template-columns: 1fr; }
  .hf-flow-arrow { flex-direction: row; justify-content: center; }
  .hf-flow-arrow-line { width: 40px; height: 1px; background: linear-gradient(to right, transparent, rgba(89, 187, 215, 0.35), transparent); }
  .hf-principles-grid { grid-template-columns: 1fr; }
  .hf-agents-grid { grid-template-columns: 1fr; }
  .hf-skills-grid { grid-template-columns: 1fr; }
  .hf-cmd-row { grid-template-columns: 1fr; gap: 0.5rem; }
  .hf-cmd-tag { align-self: flex-start; }
  .hf-install-quick { flex-wrap: wrap; justify-content: center; text-align: center; }
  .hf-inline-cmd { white-space: normal; word-break: break-all; }
  .hf-mode-toggle { width: 100%; flex-direction: column; }
  .hf-mode-btn { min-width: unset; width: 100%; }
  .hf-mode-indicator { width: calc(100% - 1rem) !important; }
}

@media (max-width: 480px) {
  .hf-hero-title { font-size: clamp(3rem, 17vw, 5rem); }
  .hf-cta-buttons { flex-direction: column; align-items: center; }
  .hf-install-quick { display: none; }
  .hf-windows-link { display: none; }
}