/* ============================================================
   CLASH DOCS / TUTORIAL PAGE — STYLESHEET
   Extends main.css design tokens; standalone from download.css.
   ============================================================ */

/* ---------- Tutorial Hero ---------- */
.tut-hero {
  position: relative;
  padding: 110px 0 70px;
  overflow: hidden;
}

.tut-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.tut-hero .container { position: relative; z-index: 1; }

.tut-hero-inner {
  text-align: center;
  max-width: 760px;
  margin: 0 auto;
}

.tut-hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,45,91,0.1);
  border: 1px solid rgba(255,45,91,0.28);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 16px;
  border-radius: 100px;
  margin-bottom: 22px;
}

.tut-kicker-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: tpulse 2s ease-in-out infinite;
}

@keyframes tpulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.7); }
}

.tut-hero-h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: 18px;
}

.tut-hero-h1 span { color: var(--accent); }

.tut-hero-sub {
  font-size: clamp(15px, 2vw, 17px);
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero platform quick-pick buttons */
.tut-hero-platforms {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.tut-hpf-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 20px;
  border: 1.5px solid var(--border);
  border-radius: 100px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.tut-hpf-btn:hover,
.tut-hpf-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255,45,91,0.06);
  box-shadow: 0 0 20px rgba(255,45,91,0.15);
}

/* Hero trust signals */
.tut-hero-trust {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 24px;
  font-size: 13px;
  color: var(--text-3);
}

.tut-trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tut-trust-item i { color: var(--green); font-size: 12px; }
.tut-trust-sep { width: 4px; height: 4px; border-radius: 50%; background: var(--border-h); }

/* Orb background (reuse download page pattern) */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,45,91,0.14) 0%, transparent 70%);
  top: -200px; left: -100px;
}

.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(123,63,228,0.12) 0%, transparent 70%);
  bottom: -100px; right: -100px;
}

/* ---------- Sticky Platform Tabs ---------- */
.platform-tabs {
  position: sticky;
  top: 68px;
  z-index: 200;
  background: rgba(245,247,252,0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.pt-inner {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 10px 0;
}
.pt-inner::-webkit-scrollbar { display: none; }

.pt-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 20px;
  border-radius: 10px;
  border: none;
  background: transparent;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.pt-tab:hover { background: rgba(0,0,0,0.05); color: var(--text); }

.pt-tab.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255,45,91,0.35);
}

.pt-tab i { font-size: 16px; }

/* ---------- Platform Tutorial Section ---------- */
.tut-platform-section {
  padding: 64px 0 80px;
}

.tut-platform-section[hidden] { display: none; }

/* Even sections get a subtle background */
.tut-platform-section:nth-of-type(even) {
  background: var(--bg-1);
}

/* Section head (reuse download page pattern) */
.ps-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.ps-title-group { display: flex; flex-direction: column; gap: 8px; }

.ps-platform-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(22px, 3.5vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.ps-platform-label i { font-size: 0.9em; color: var(--accent); }

.ps-sysreq {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.sysreq-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-2);
  font-weight: 500;
}

/* ---------- Client Selector Tabs (within platform section) ---------- */
.tut-client-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.tut-client-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 100px;
  border: 1.5px solid var(--border);
  background: var(--bg-card);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-2);
}

.tut-client-tab:hover { border-color: var(--border-h); color: var(--text); }

.tut-client-tab.active {
  border-color: var(--accent);
  background: rgba(255,45,91,0.08);
  color: var(--accent);
}

.tut-client-tab .tut-rec-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--accent);
  color: #fff;
}

.tut-client-content { display: none; }
.tut-client-content.active { display: block; }

/* ---------- Tutorial Steps ---------- */
.tut-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tut-step {
  display: flex;
  gap: 20px;
  background: var(--bg-card);
  border-radius: var(--r-lg);
  padding: 24px 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.tut-step:hover {
  border-color: var(--border-h);
  box-shadow: 0 4px 24px rgba(0,0,0,0.07);
  transform: translateY(-1px);
}

/* Connector line between steps */
.tut-step::after {
  content: '';
  position: absolute;
  left: 49px;
  bottom: -16px;
  width: 2px;
  height: 16px;
  background: linear-gradient(to bottom, rgba(255,45,91,0.3), transparent);
  pointer-events: none;
}

.tut-step:last-child::after { display: none; }

.tut-step-num {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, #a01550 100%);
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(255,45,91,0.35);
}

.tut-step-body { flex: 1; min-width: 0; }

.tut-step-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.tut-step-desc {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
}

.tut-step-desc strong { color: var(--text); }

.tut-step-desc code {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--bg-2);
  font-family: 'SFMono-Regular', 'Consolas', monospace;
  font-size: 12px;
  color: var(--accent);
}

/* Substep list inside a step */
.tut-substeps {
  margin-top: 10px;
  padding-left: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tut-substeps li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  overflow-wrap: break-word;
  line-break: auto;
}

.tut-substeps li::before {
  content: '›';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 16px;
  line-height: 1.4;
}

/* ---------- Platform Note / Tip ---------- */
.platform-note {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: rgba(0,152,204,0.06);
  border: 1px solid rgba(0,152,204,0.2);
  border-radius: var(--r-lg);
  padding: 18px 22px;
  margin-top: 28px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}

.platform-note > i {
  color: var(--cyan);
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 2px;
}

.platform-note p { margin: 0; }
.platform-note p + p { margin-top: 6px; }
.platform-note strong { color: var(--text); }
.platform-note code {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: rgba(0,0,0,0.06);
  font-family: 'SFMono-Regular', 'Consolas', monospace;
  font-size: 12px;
}

/* Warning note (yellow) */
.platform-note.note-warn {
  background: rgba(212,152,0,0.07);
  border-color: rgba(212,152,0,0.28);
}
.platform-note.note-warn > i { color: var(--yellow); }

/* ---------- CLI Code Block ---------- */
.tut-cli {
  background: #0d1117;
  border-radius: var(--r-lg);
  overflow: hidden;
  margin-top: 20px;
}

.tut-cli-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: #161b22;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.tut-cli-dots {
  display: flex;
  gap: 5px;
}

.tut-cli-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}

.tut-cli-dot.r { background: #ff5f57; }
.tut-cli-dot.y { background: #ffbd2e; }
.tut-cli-dot.g { background: #28ca41; }

.tut-cli-label {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  font-family: 'SFMono-Regular', 'Consolas', monospace;
}

.tut-cli-code {
  padding: 20px 20px 24px;
  font-family: 'SFMono-Regular', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.8;
  color: #e6edf3;
  overflow-x: auto;
  white-space: pre;
}

.tut-cli-comment { color: #6e7681; }
.tut-cli-prompt  { color: #ff7b72; user-select: none; }
.tut-cli-cmd     { color: #79c0ff; }
.tut-cli-path    { color: #a5d6ff; }
.tut-cli-ok      { color: #3fb950; }

/* ---------- iOS Apple ID Guide ---------- */
.ios-guide-section {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 36px;
  margin-top: 28px;
}

.ios-guide-head {
  margin-bottom: 28px;
}

.ios-guide-head h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.ios-guide-head h3 i { color: var(--accent); }

.ios-guide-head p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

.ios-guide-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}

.ios-step {
  background: var(--bg);
  border-radius: var(--r);
  padding: 20px;
  border: 1px solid var(--border);
}

.ios-step-num {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #a01550);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 10px;
}

.ios-step h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}

.ios-step p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.65;
}

.ios-step strong { color: var(--text); }

/* ---------- Config Guide Section ---------- */
.config-guide-section {
  padding: 80px 0;
  background: var(--bg-1);
}

.config-guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 0;
}

.config-guide-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: var(--transition);
}

.config-guide-card:hover {
  border-color: var(--border-h);
  box-shadow: 0 6px 32px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.cg-icon {
  width: 48px; height: 48px;
  border-radius: var(--r);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}

.cg-icon-red   { background: rgba(255,45,91,0.1);   color: var(--accent); }
.cg-icon-blue  { background: rgba(0,152,204,0.1);   color: var(--cyan);   }
.cg-icon-purple{ background: rgba(123,63,228,0.1);  color: var(--purple); }
.cg-icon-green { background: rgba(0,168,107,0.1);   color: var(--green);  }

.config-guide-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}

.config-guide-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

.config-guide-card p + p { margin-top: 8px; }
.config-guide-card strong { color: var(--text); }

/* Mode comparison table */
.mode-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 14px;
  font-size: 13px;
}

.mode-table th {
  text-align: left;
  padding: 7px 10px;
  background: var(--bg-2);
  font-weight: 600;
  color: var(--text-2);
  border-radius: 6px 6px 0 0;
}

.mode-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text-2);
  vertical-align: top;
}

.mode-table tr:last-child td { border-bottom: none; }

.mode-table td:first-child {
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

/* ---------- FAQ Section ---------- */
.faq-tut-section {
  padding: 80px 0;
}

.faq-tut-grid {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-top: 0;
}

.faq-tut-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

.faq-tut-item details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: var(--transition);
}

.faq-tut-item details:hover { border-color: var(--border-h); }

.faq-tut-item details[open] {
  border-color: rgba(255,45,91,0.3);
  box-shadow: 0 4px 20px rgba(255,45,91,0.08);
}

.faq-tut-item summary {
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  user-select: none;
  -webkit-user-select: none;
}

.faq-tut-item summary::-webkit-details-marker { display: none; }

.faq-tut-item summary::after {
  content: '\f067';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 11px;
  color: var(--text-3);
  flex-shrink: 0;
  transition: transform 0.2s;
}

.faq-tut-item details[open] summary::after {
  content: '\f068';
}

.faq-tut-answer {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
}

.faq-tut-answer p + p { margin-top: 8px; }
.faq-tut-answer strong { color: var(--text); }
.faq-tut-answer code {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--bg-2);
  font-family: 'SFMono-Regular', 'Consolas', monospace;
  font-size: 12px;
  color: var(--accent);
}

/* ---------- CTA / Download Band ---------- */
.tut-cta-band {
  padding: 80px 0;
}

.tut-cta-inner {
  background: linear-gradient(135deg, #1a0a2e 0%, #0d1117 100%);
  border-radius: var(--r-xl);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.tut-cta-inner::before {
  content: '';
  position: absolute;
  top: -120px; left: -80px;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,45,91,0.2) 0%, transparent 70%);
  pointer-events: none;
}

.tut-cta-inner::after {
  content: '';
  position: absolute;
  bottom: -100px; right: -60px;
  width: 350px; height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123,63,228,0.18) 0%, transparent 70%);
  pointer-events: none;
}

.tut-cta-inner > * { position: relative; z-index: 1; }

.tut-cta-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,45,91,0.2);
  border: 1px solid rgba(255,45,91,0.4);
  color: #ff7b9c;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
}

.tut-cta-inner h2 {
  font-size: clamp(24px, 3.5vw, 38px);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 14px;
}

.tut-cta-inner h2 span { color: var(--accent); }

.tut-cta-inner p {
  font-size: 16px;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  max-width: 500px;
  margin: 0 auto 32px;
}

.tut-cta-btns {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 100px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(255,45,91,0.4);
}

.btn-cta-primary:hover {
  background: var(--accent-h);
  box-shadow: 0 8px 32px rgba(255,45,91,0.5);
  transform: translateY(-2px);
}

.btn-cta-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 100px;
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: var(--transition);
}

.btn-cta-ghost:hover {
  border-color: rgba(255,255,255,0.5);
  color: #fff;
}

/* ---------- Mobile Responsive ---------- */
@media (max-width: 900px) {
  .config-guide-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .tut-hero { padding: 80px 0 50px; }

  .tut-step { flex-direction: column; gap: 14px; padding: 20px; }
  .tut-step::after { left: 30px; }

  .config-guide-grid { grid-template-columns: 1fr; }

  .faq-tut-grid { flex-direction: column; }

  .ios-guide-steps { grid-template-columns: 1fr; }

  .ios-guide-section { padding: 24px 20px; }

  .tut-cta-inner { padding: 40px 24px; }

  .tut-cta-btns { flex-direction: column; }
  .btn-cta-primary,
  .btn-cta-ghost { width: 100%; justify-content: center; }

  .tut-client-tabs { gap: 6px; }
  .tut-client-tab  { font-size: 12px; padding: 6px 14px; }

  .tut-cli-code { font-size: 12px; }
}

@media (max-width: 480px) {
  .tut-hero-platforms { gap: 6px; }
  .tut-hpf-btn { padding: 7px 14px; font-size: 13px; }

  .ps-platform-label { font-size: 20px; }

  .tut-step-num { width: 34px; height: 34px; font-size: 14px; }
}