/* ==========================================================================
   machines.css — HackTheBox Machines Interactive
   ========================================================================== */

/* ── HTB colour tokens ─────────────────────────────────────────────────── */
:root {
  --brand-100:        #f4fee5;
  --brand-200:        #e2fdb3;
  --brand-300:        #cafc73;
  --brand-400:        #b3f733;
  --brand-500:        #9fef00;
  --brand-600:        #82c700;
  --brand-700:        #629900;
  --brand-800:        #466e00;
  --brand-900:        #2a4500;

  --htb-green:        var(--brand-500);
  --htb-green-dim:    rgba(159, 239, 0, 0.18);
  --htb-green-soft:   rgba(159, 239, 0, 0.08);
  --htb-green-border: rgba(159, 239, 0, 0.28);

  --diff-easy:        #4ade80;
  --diff-easy-bg:     rgba(74, 222, 128, 0.09);
  --diff-easy-bdr:    rgba(74, 222, 128, 0.32);

  --diff-medium:      #fbbf24;
  --diff-medium-bg:   rgba(251, 191, 36, 0.09);
  --diff-medium-bdr:  rgba(251, 191, 36, 0.32);

  --diff-hard:        #fb923c;
  --diff-hard-bg:     rgba(251, 146, 60, 0.09);
  --diff-hard-bdr:    rgba(251, 146, 60, 0.32);

  --diff-insane:      #fb7185;
  --diff-insane-bg:   rgba(251, 113, 133, 0.09);
  --diff-insane-bdr:  rgba(251, 113, 133, 0.32);

  --os-linux:         #67e8f9;
  --os-windows:       #93c5fd;
}

[data-theme="light"] {
  --htb-green:        #2f5200; /* WCAG AA: ≥4.5:1 against light panel/bg */
  --htb-green-dim:    rgba(47, 82, 0, 0.16);
  --htb-green-soft:   rgba(47, 82, 0, 0.08);
  --htb-green-border: rgba(47, 82, 0, 0.28);
  --diff-easy:        #15803d;
  --diff-medium:      #a16207;
  --diff-hard:        #b45309;
  --diff-insane:      #be123c;
  --os-linux:         #0e7490;
  --os-windows:       #1d4ed8;
}

/* ── Hero ──────────────────────────────────────────────────────────────── */
.htb-hero {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(1.8rem, 4vw, 3.5rem);
  padding-block: clamp(3rem, 7vw, 5.5rem) clamp(2rem, 4vw, 3rem);
  text-align: left;
  /* Self-hosted background picture — shows on every machine page. */
  background-image: url("../img/patterns/htb-grid.svg");
  background-repeat: repeat;
  background-size: 64px 64px;
}

.htb-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 20% 0;
  z-index: -1;
  pointer-events: none;
  background-image: linear-gradient(var(--htb-green-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--htb-green-border) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(70% 80% at 15% 40%, #000, transparent 75%);
  mask-image: radial-gradient(70% 80% at 15% 40%, #000, transparent 75%);
  opacity: 0.14;
}

.htb-hero-badge {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: clamp(80px, 11vw, 120px);
  height: clamp(80px, 11vw, 120px);
  border-radius: 50%;
  border: 1px solid var(--htb-green-border);
  background: var(--htb-green-soft);
  box-shadow: 0 0 35px var(--htb-green-dim), inset 0 1px 0 rgba(255,255,255,0.05);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.htb-hero-badge:hover {
  transform: scale(1.04);
  box-shadow: 0 0 50px var(--htb-green-dim);
}

@media (prefers-reduced-motion: no-preference) {
  .htb-hero-badge {
    animation: htb-hero-enter 0.6s var(--ease-out) 1;
  }
}

@keyframes htb-hero-enter {
  0% {
    opacity: 0;
    transform: scale(0.92);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.htb-hero-badge svg {
  width: 58%;
  height: 58%;
}

.htb-brand-logo {
  width: 58%;
  height: 58%;
  object-fit: contain;
  filter: drop-shadow(0 0 14px var(--htb-green-dim));
}

.htb-hero-text {
  flex: 1;
  min-width: 0;
}

.htb-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--htb-green);
  margin-bottom: 0.7rem;
}

.dot--htb {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--htb-green);
  box-shadow: 0 0 0 3px var(--htb-green-dim);
  flex-shrink: 0;
}

.htb-title {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 5.5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.045em;
  margin: 0 0 0.9rem;
}

.grad-htb {
  background: linear-gradient(96deg, var(--htb-green) 10%, #c8ff6b 55%, #e8ffb0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--htb-green);
}

[data-theme="light"] .grad-htb {
  background-image: linear-gradient(96deg, #3d6800, #5a9a00 52%, #7cb800);
}

.htb-lede {
  color: var(--muted);
  font-size: clamp(0.9rem, 1.4vw, 1.02rem);
  max-width: 58ch;
  line-height: 1.7;
  margin-bottom: 1.4rem;
}

.htb-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--faint);
}

.htb-meta strong {
  color: var(--htb-green);
  font-weight: 600;
}

/* ── Controls bar ─────────────────────────────────────────────────────── */
.htb-section {
  padding-bottom: clamp(3rem, 6vw, 5rem);
}

.htb-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.4rem;
}

/* Stacked controls modifier (used on homepage & centered layouts) */
.htb-controls--stack {
  flex-direction: column;
  align-items: stretch;
  gap: 1rem;
}

.htb-controls--stack .htb-search-wrap {
  flex: 1 1 100%;
  max-width: 560px;
  margin: 0 auto;
}

.htb-controls--stack .htb-filters,
.htb-controls--stack .htb-os-filters,
.htb-controls--stack .htb-platform-filters {
  justify-content: center;
  flex-wrap: wrap;
}

.htb-controls--stack .htb-result-count {
  text-align: center;
  width: 100%;
  margin: 0 auto;
}

/* Search row container */
.htb-search-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
}

/* Search */
.htb-search-wrap {
  position: relative;
  flex: 1 1 260px;
  min-width: 0;
}

.htb-search-wrap svg {
  position: absolute;
  left: 0.95rem;
  top: 50%;
  translate: 0 -50%;
  width: 15px;
  height: 15px;
  color: var(--faint);
  pointer-events: none;
}

.htb-search-wrap input {
  width: 100%;
  height: 46px;
  padding: 0 3.2rem 0 2.6rem;
  border-radius: 12px;
  border: 1px solid var(--htb-green-border);
  background: var(--panel);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  transition: border-color 0.18s, background 0.18s, box-shadow 0.18s;
}

.htb-search-wrap input::placeholder {
  color: var(--faint);
}

.htb-search-wrap input:focus {
  outline: none;
  border-color: var(--htb-green);
  background: var(--bg-soft);
  box-shadow: 0 0 0 3px var(--htb-green-soft);
}

.htb-search-wrap input:focus-visible {
  outline: 2px solid var(--htb-green);
  outline-offset: 2px;
}

.search-kbd {
  position: absolute;
  right: 0.9rem;
  top: 50%;
  translate: 0 -50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 22px;
  padding: 0 0.35rem;
  border-radius: 6px;
  border: 1px solid var(--line-strong);
  background: var(--bg-soft);
  color: var(--faint);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  pointer-events: none;
}

/* Filter toggle button (Funnel icon [ Y ]) */
.htb-filter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  border: 1px solid var(--htb-green-border);
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
    border-color 0.18s var(--ease), box-shadow 0.18s var(--ease), transform 0.18s var(--ease);
}

.htb-filter-btn svg {
  width: 18px;
  height: 18px;
}

.htb-filter-btn:hover {
  color: var(--text);
  background: var(--panel-2);
  border-color: var(--htb-green);
}

.htb-filter-btn[aria-expanded="true"] {
  color: var(--htb-green);
  border-color: var(--htb-green);
  background: var(--htb-green-soft);
  box-shadow: 0 0 16px var(--htb-green-dim);
}

.htb-filter-btn:focus-visible {
  outline: 2px solid var(--htb-green);
  outline-offset: 2px;
}

/* Search filter dropdown */
.htb-tag-panel {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  max-height: min(42vh, 320px);
  overflow-y: auto;
  padding: 2.8rem 1rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(180deg, var(--htb-green-soft), transparent 68px),
    var(--panel);
  box-shadow: 0 26px 70px -34px rgba(0, 0, 0, 0.9);
  width: 100%;
  margin-top: 0.35rem;
  animation: htb-filter-open 180ms var(--ease-out);
}

.htb-tag-panel::before {
  content: "TOPIC FILTERS";
  position: absolute;
  top: 0.9rem;
  left: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--htb-green);
}

@keyframes htb-filter-open {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.htb-tag-panel[hidden] {
  display: none !important;
}

.htb-tag-panel-empty {
  width: 100%;
  margin: 0;
  color: var(--faint);
  font-size: 0.85rem;
}

.htb-tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.32rem 0.72rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: color 0.15s var(--ease), background-color 0.15s var(--ease),
    border-color 0.15s var(--ease), box-shadow 0.15s var(--ease), transform 0.15s var(--ease);
}

.htb-tag-pill::before {
  content: "#";
  color: var(--faint);
  margin-right: 0.2rem;
  font-weight: 400;
}

.htb-tag-pill:hover {
  color: var(--text);
  border-color: var(--line-strong);
  background: var(--panel-2);
}

.htb-tag-pill--active,
.htb-tag-pill[aria-pressed="true"] {
  color: #fff;
  border-color: var(--htb-green);
  background: rgba(159, 239, 0, 0.15);
  box-shadow: 0 0 12px var(--htb-green-dim);
}

.htb-tag-pill--active::before,
.htb-tag-pill[aria-pressed="true"]::before {
  color: var(--htb-green);
}

.htb-tag-pill:focus-visible {
  outline: 2px solid var(--htb-green);
  outline-offset: 2px;
}

/* Platform filter categories */
.htb-platform-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
  width: 100%;
}

.htb-platform-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 42px;
  padding: 0.42rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease),
    border-color 0.18s var(--ease), box-shadow 0.18s var(--ease), transform 0.18s var(--ease);
  white-space: nowrap;
}

.htb-platform-btn:hover {
  color: var(--text);
  background: var(--panel-2);
  border-color: var(--line-strong);
}

.htb-platform-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Active platform states */
.htb-platform-btn--active,
.htb-platform-btn[aria-pressed="true"] {
  color: var(--text);
  border-color: var(--platform-accent, var(--htb-green));
  background: var(--platform-bg, var(--htb-green-soft));
  box-shadow: 0 0 16px var(--platform-dim, var(--htb-green-dim));
}

.htb-platform-btn[data-platform="all"] {
  --platform-accent: var(--htb-green);
  --platform-bg: var(--htb-green-soft);
  --platform-dim: var(--htb-green-dim);
}

.htb-platform-btn[data-platform="htb"] {
  --platform-accent: #9fef00;
  --platform-bg: rgba(159, 239, 0, 0.12);
  --platform-dim: rgba(159, 239, 0, 0.22);
}

.htb-platform-btn[data-platform="thm"] {
  --platform-accent: #ef4444;
  --platform-bg: rgba(239, 68, 68, 0.12);
  --platform-dim: rgba(239, 68, 68, 0.22);
}

.htb-platform-btn[data-platform="talks"] {
  --platform-accent: #a855f7;
  --platform-bg: rgba(168, 85, 247, 0.12);
  --platform-dim: rgba(168, 85, 247, 0.22);
}

.htb-platform-btn[data-platform="hacksmarter"] {
  --platform-accent: #38bdf8;
  --platform-bg: rgba(56, 189, 248, 0.12);
  --platform-dim: rgba(56, 189, 248, 0.22);
}

.platform-filter-logo,
.os-filter-logo {
  width: 21px;
  height: 21px;
  object-fit: contain;
  flex-shrink: 0;
}

.platform-filter-logo--photo {
  border-radius: 5px;
}

.htb-filters-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.htb-tag--platform {
  color: var(--text);
  border-color: var(--line-strong);
  font-weight: 600;
}

/* Difficulty chips */
.htb-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.htb-chip {
  padding: 0.38rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}

.htb-chip:hover {
  color: var(--text);
  background: var(--panel-2);
}

.htb-chip:focus-visible {
  outline: 2px solid var(--htb-green);
  outline-offset: 2px;
}

/* Difficulty-specific active colours */
.htb-chip--all.htb-chip--active,
.htb-chip--all[aria-pressed="true"] {
  color: var(--htb-green);
  border-color: var(--htb-green-border);
  background: var(--htb-green-soft);
}

.htb-chip--easy[aria-pressed="true"] {
  color: var(--diff-easy);
  border-color: var(--diff-easy-bdr);
  background: var(--diff-easy-bg);
}

.htb-chip--medium[aria-pressed="true"] {
  color: var(--diff-medium);
  border-color: var(--diff-medium-bdr);
  background: var(--diff-medium-bg);
}

.htb-chip--hard[aria-pressed="true"] {
  color: var(--diff-hard);
  border-color: var(--diff-hard-bdr);
  background: var(--diff-hard-bg);
}

.htb-chip--insane[aria-pressed="true"] {
  color: var(--diff-insane);
  border-color: var(--diff-insane-bdr);
  background: var(--diff-insane-bg);
}

/* OS filter buttons */
.htb-os-filters {
  display: flex;
  gap: 0.3rem;
  align-items: center;
}

.htb-os-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.38rem 0.75rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
  white-space: nowrap;
}

.htb-os-btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.htb-os-btn:hover {
  color: var(--text);
  background: var(--panel-2);
}

.htb-os-btn:focus-visible {
  outline: 2px solid var(--htb-green);
  outline-offset: 2px;
}

.htb-os-btn--active,
.htb-os-btn[aria-pressed="true"] {
  color: var(--accent-2);
  border-color: rgba(103, 232, 249, 0.36);
  background: rgba(103, 232, 249, 0.07);
}

.htb-os-btn[data-os="linux"][aria-pressed="true"] {
  color: var(--os-linux);
  border-color: rgba(103, 232, 249, 0.36);
  background: rgba(103, 232, 249, 0.07);
}

.htb-os-btn[data-os="windows"][aria-pressed="true"] {
  color: var(--os-windows);
  border-color: rgba(147, 197, 253, 0.36);
  background: rgba(147, 197, 253, 0.07);
}

/* Result count */
.htb-result-count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--faint);
  white-space: nowrap;
}

/* ── Machine list ─────────────────────────────────────────────────────── */
.htb-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  transition: opacity 120ms var(--ease-out), transform 120ms var(--ease-out);
}

.htb-list--updating {
  opacity: 0.42;
  transform: translateY(3px);
}

.htb-list--updated .htb-row {
  animation: htb-result-in 180ms var(--ease-out) both;
}

@keyframes htb-result-in {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Single machine row */
.htb-row {
  display: grid;
  grid-template-columns: 68px 1fr auto;
  align-items: center;
  gap: 0 1.4rem;
  padding: 1rem 1.2rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  cursor: default;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s var(--ease), border-color 0.2s, box-shadow 0.2s, background 0.2s;
  position: relative;
  overflow: hidden;
}

/* Card background artwork */
.htb-row-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.htb-row-bg img {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: clamp(260px, 45%, 520px);
  height: 180%;
  object-fit: cover;
  object-position: center right;
  opacity: 0.16;
  filter: saturate(1.2) contrast(1.1);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, rgba(0, 0, 0, 0.4) 25%, rgba(0, 0, 0, 0.95) 80%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, rgba(0, 0, 0, 0.4) 25%, rgba(0, 0, 0, 0.95) 80%, transparent 100%);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}

.htb-row:hover .htb-row-bg img {
  opacity: 0.32;
  transform: translateY(-50%) scale(1.04);
}

.htb-row > *:not(.htb-row-bg) {
  position: relative;
  z-index: 1;
}

a.htb-row {
  cursor: pointer;
}

/* Subtle accent stripe on left */
.htb-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12%;
  bottom: 12%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--row-accent, var(--htb-green));
  opacity: 0;
  transition: opacity 0.2s;
}

.htb-row:hover::before,
.htb-row:focus-visible::before {
  opacity: 1;
}

.htb-row:focus-visible {
  outline: 2px solid var(--htb-green);
  outline-offset: 2px;
}

a.htb-row:hover {
  transform: translateX(4px);
  border-color: rgba(159, 239, 0, 0.28);
  box-shadow: 0 8px 32px -12px rgba(0,0,0,0.7);
  background: var(--panel-2);
}

.htb-row[data-diff="easy"]   { --row-accent: var(--diff-easy); }
.htb-row[data-diff="medium"] { --row-accent: var(--diff-medium); }
.htb-row[data-diff="hard"]   { --row-accent: var(--diff-hard); }
.htb-row[data-diff="insane"] { --row-accent: var(--diff-insane); }

/* Machine avatar */
.htb-avatar {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  object-fit: cover;
  background: var(--bg-soft);
  flex-shrink: 0;
  transition: border-color 0.2s;
}

.htb-row:hover .htb-avatar {
  border-color: var(--row-accent, var(--htb-green));
}

/* Avatar fallback (no image) */
.htb-avatar-placeholder {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  border: 2px solid var(--line-strong);
  background: var(--bg-soft);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--htb-green);
  transition: border-color 0.2s;
}

.htb-row:hover .htb-avatar-placeholder {
  border-color: var(--row-accent, var(--htb-green));
}

/* Middle: name + meta */
.htb-row-body {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.htb-row-top {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.htb-machine-name {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  transition: color 0.15s;
}

a.htb-row:hover .htb-machine-name {
  color: var(--htb-green);
}

/* Status badge */
.htb-status {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--faint);
}

.htb-status-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ok);
  flex-shrink: 0;
}

.htb-status--retired .htb-status-dot {
  background: var(--faint);
}

/* Date row */
.htb-row-dates {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--faint);
}

.htb-row-dates strong {
  color: var(--muted);
  font-weight: 500;
}

/* OS icon in dates row */
.htb-os-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--faint);
}

.htb-os-icon svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}

.htb-inline-logo {
  width: 15px;
  height: 15px;
  object-fit: contain;
  flex-shrink: 0;
}

.htb-os-icon--linux  { color: var(--os-linux); }
.htb-os-icon--windows { color: var(--os-windows); }

/* Tags row */
.htb-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.15rem;
}

.htb-tag {
  display: inline-block;
  padding: 0.17rem 0.48rem;
  border-radius: var(--radius-xs);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--muted);
  transition: color 0.14s, border-color 0.14s;
}

.htb-row:hover .htb-tag {
  color: var(--text);
  border-color: var(--line-strong);
}

.htb-tag--more {
  color: var(--faint);
  border-style: dashed;
}

/* Right: difficulty + OS badge column */
.htb-row-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
  flex-shrink: 0;
  min-width: 80px;
}

.htb-platform-edge {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 0.1rem;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg-soft);
}

.htb-platform-edge img {
  width: 25px;
  height: 25px;
  object-fit: contain;
  border-radius: 5px;
}

/* Difficulty pill */
.htb-diff-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  border: 1px solid;
  font-family: var(--font-mono);
  font-size: 0.67rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  white-space: nowrap;
}

.htb-diff-badge--easy   { color: var(--diff-easy);   border-color: var(--diff-easy-bdr);   background: var(--diff-easy-bg); }
.htb-diff-badge--medium { color: var(--diff-medium); border-color: var(--diff-medium-bdr); background: var(--diff-medium-bg); }
.htb-diff-badge--hard   { color: var(--diff-hard);   border-color: var(--diff-hard-bdr);   background: var(--diff-hard-bg); }
.htb-diff-badge--insane { color: var(--diff-insane); border-color: var(--diff-insane-bdr); background: var(--diff-insane-bg); }

/* OS badge */
.htb-os-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.22rem 0.55rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

.htb-os-badge svg {
  width: 12px;
  height: 12px;
  flex-shrink: 0;
}

.htb-os-badge .htb-inline-logo {
  width: 14px;
  height: 14px;
}

.htb-os-badge--linux {
  color: var(--os-linux);
  border-color: rgba(103, 232, 249, 0.25);
  background: rgba(103, 232, 249, 0.05);
}

.htb-os-badge--windows {
  color: var(--os-windows);
  border-color: rgba(147, 197, 253, 0.25);
  background: rgba(147, 197, 253, 0.05);
}

/* ── Empty states ─────────────────────────────────────────────────────── */
.htb-empty,
.htb-empty-filter {
  padding: 3.5rem 1.5rem;
  text-align: center;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.92rem;
  margin-top: 0.5rem;
  background: none;
}

.htb-empty strong,
.htb-empty span {
  display: block;
}

.htb-empty strong {
  margin-bottom: 0.35rem;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.htb-reset-link {
  background: none;
  border: none;
  padding: 0;
  color: var(--htb-green);
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  font: inherit;
  font-size: inherit;
}

.htb-reset-link:hover {
  color: var(--text);
}

.htb-reset-link:focus-visible {
  outline: 2px solid var(--htb-green);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 780px) {
  .htb-hero {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }

  .htb-hero-badge {
    width: 80px;
    height: 80px;
  }

  .htb-lede { margin-inline: auto; }
  .htb-meta { justify-content: center; }

  .htb-row {
    grid-template-columns: 52px 1fr;
    grid-template-rows: auto auto;
    gap: 0.6rem 1rem;
  }

  .htb-row-right {
    grid-column: 2;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    flex-wrap: wrap;
    min-width: 0;
  }

  .htb-avatar,
  .htb-avatar-placeholder {
    width: 50px;
    height: 50px;
  }

  .htb-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .htb-search-wrap { max-width: 100%; }
  .htb-result-count { margin-left: 0; }
}

@media (max-width: 480px) {
  .htb-row {
    grid-template-columns: 44px 1fr;
  }

  .htb-machine-name { font-size: 1rem; }

  .htb-tags { display: none; }
}