/* =========================================================
   S-Indexer — design tokens
   ========================================================= */
:root{
  --bg:            #0A0E17;
  --surface:       #121926;
  --surface-2:     #182234;
  --border:        #253150;
  --border-soft:   #1C2740;
  --text:          #E7ECF7;
  --text-dim:      #8C9AB8;
  --text-faint:    #5C6B8A;

  --accent:        #4F7CFF;
  --accent-dim:    #345098;
  --accent-soft:   rgba(79,124,255,0.12);

  --ok:            #2FD9A8;
  --ok-soft:       rgba(47,217,168,0.12);
  --pending:       #F3B65C;
  --pending-soft:  rgba(243,182,92,0.12);

  --danger:        #FF6B6B;

  --font-ui:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --radius-sm: 6px;
  --radius-md: 10px;
}

*{ box-sizing: border-box; }

html, body{
  height: 100%;
}

body{
  background:
    radial-gradient(1100px 500px at 12% -10%, rgba(79,124,255,0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a{ color: inherit; }

/* Focus visibility (accessibility floor) */
a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* =========================================================
   Navbar
   ========================================================= */
.si-navbar{
  background: rgba(10,14,23,0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
  padding: .85rem 0;
}

.si-brand{
  display: flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
}

.si-brand-mark{
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(150deg, var(--accent), #7C5CFF);
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-family: var(--font-ui);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08) inset, 0 6px 18px -6px rgba(79,124,255,0.55);
}

.si-brand-text{ letter-spacing: 0.01em; }

.si-status-pill{
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 500;
  color: var(--ok);
  background: var(--ok-soft);
  border: 1px solid rgba(47,217,168,0.35);
  padding: .35rem .7rem;
  border-radius: 999px;
}

.si-status-dot{
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(47,217,168,0.18);
}

/* =========================================================
   Page head
   ========================================================= */
.si-main{
  max-width: 880px;
  margin: 0 auto;
  padding-top: 2.75rem;
  padding-bottom: 4rem;
}

.si-page-head{
  margin-bottom: 2.5rem;
}

.si-page-title{
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: .35rem;
}

.si-page-sub{
  color: var(--text-dim);
  margin-bottom: 0;
}

/* =========================================================
   Step rail (sequence — numbering is meaningful here)
   ========================================================= */
.si-step{
  display: flex;
  gap: 1.25rem;
}

.si-step-rail{
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 0 0 auto;
}

.si-step-num{
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .9rem;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.si-step-line{
  flex: 1 1 auto;
  width: 1px;
  background: linear-gradient(var(--border), transparent);
  margin: .5rem 0;
  min-height: 24px;
}

.si-step-body{
  flex: 1 1 auto;
  min-width: 0;
  padding-bottom: 2.25rem;
}

.si-step-last .si-step-body{ padding-bottom: 0; }

/* =========================================================
   Cards
   ========================================================= */
.si-card{
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.6rem;
}

.si-step-title{
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: .5rem;
  letter-spacing: -0.005em;
}

.si-step-text{
  color: var(--text-dim);
  font-size: .92rem;
  margin-bottom: 1.1rem;
  max-width: 62ch;
}

.si-btn-group{
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
}

/* Buttons */
.si-btn-outline{
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .88rem;
  font-weight: 500;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .55rem 1rem;
  transition: border-color .15s ease, background .15s ease;
}
.si-btn-outline:hover{
  border-color: var(--accent-dim);
  background: var(--accent-soft);
  color: var(--text);
}

.si-btn-primary{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-size: .88rem;
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: .6rem 1.15rem;
  white-space: nowrap;
  transition: background .15s ease, transform .1s ease;
}
.si-btn-primary:hover{ background: #3E6BEF; color: #fff; }
.si-btn-primary:active{ transform: translateY(1px); }
.si-btn-primary:disabled{
  opacity: .65;
  cursor: not-allowed;
}

.si-step-note{
  font-size: .82rem;
  color: var(--text-faint);
  margin: .9rem 0 0;
  padding-top: .9rem;
  border-top: 1px solid var(--border-soft);
  max-width: 62ch;
}

/* Form */
.si-label{
  font-size: .78rem;
  font-weight: 500;
  color: var(--text-faint);
  text-transform: none;
  margin-bottom: .4rem;
}

.si-label-spaced{ margin-top: 1.25rem; }

#key-feedback{
  color: var(--text-faint);
  line-height: 1.5;
}

#key-feedback code{
  font-family: var(--font-mono);
  color: var(--accent);
  background: var(--accent-soft);
  padding: .05rem .35rem;
  border-radius: 4px;
}

.si-input-row{
  display: flex;
  gap: .6rem;
  flex-wrap: wrap;
}

.si-input{
  flex: 1 1 280px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .88rem;
  border-radius: var(--radius-sm);
  padding: .6rem .8rem;
}
.si-input::placeholder{ color: var(--text-faint); }
.si-input:focus{
  background: var(--surface-2);
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.si-input.is-invalid{
  border-color: var(--danger);
}
.si-input.is-invalid:focus{
  box-shadow: 0 0 0 3px rgba(255,107,107,0.15);
}

.si-feedback{
  margin-top: .55rem;
  font-size: .82rem;
  min-height: 1.1em;
}
.si-feedback.is-error{ color: var(--danger); }
.si-feedback.is-ok{ color: var(--ok); }

.si-target-list{
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
}

.si-target-item{
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  color: var(--text-faint);
  transition: color .2s ease;
}

.si-target-dot{
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--border);
  transition: background .2s ease, box-shadow .2s ease;
}

.si-target-item.is-done{ color: var(--text-dim); }
.si-target-item.is-done .si-target-dot{
  background: var(--ok);
  box-shadow: 0 0 0 3px var(--ok-soft);
}

.si-yandex-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--border-soft);
}

.si-yandex-row + .si-input-row{
  margin-top: .75rem;
}

.si-yandex-copy{
  display: flex;
  flex-direction: column;
  gap: .15rem;
  min-width: 200px;
}

.si-yandex-title{
  font-size: .86rem;
  font-weight: 600;
  color: var(--text);
}

.si-yandex-sub{
  font-size: .78rem;
  color: var(--text-faint);
  max-width: 42ch;
}

#yandex-ping-btn.is-pinged{
  color: var(--ok);
  border-color: rgba(47,217,168,0.35);
  background: var(--ok-soft);
}

/* =========================================================
   Footer
   ========================================================= */
.si-footer{
  border-top: 1px solid var(--border-soft);
  padding: 1.25rem 0;
  color: var(--text-faint);
  font-size: .8rem;
}
.si-footer .container-fluid{
  max-width: 880px;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.si-footer-dim{ color: var(--text-faint); }

/* =========================================================
   Toast
   ========================================================= */
.si-toast-wrap{
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1080;
  pointer-events: none;
}

.si-toast{
  font-family: var(--font-mono);
  font-size: .84rem;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--ok);
  padding: .7rem 1.1rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 30px -10px rgba(0,0,0,0.6);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .25s ease, transform .25s ease;
}

.si-toast.is-visible{
  opacity: 1;
  transform: translateY(0);
}

.si-toast.is-error{ border-left-color: var(--danger); }

/* =========================================================
   404 page
   ========================================================= */
.si-404-main{
  min-height: calc(100vh - 68px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1.5rem;
}

.si-404-code{
  font-family: var(--font-mono);
  font-size: 4.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 1rem;
}

.si-404-title{
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: .6rem;
}

.si-404-text{
  color: var(--text-dim);
  max-width: 46ch;
  margin-bottom: 1.75rem;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 575.98px){
  .si-main{ padding-top: 2rem; }
  .si-card{ padding: 1.15rem 1.15rem; }
  .si-btn-group{ flex-direction: column; align-items: stretch; }
  .si-input-row{ flex-direction: column; }
  .si-btn-primary{ width: 100%; }
  #yandex-ping-btn{ width: 100%; justify-content: center; }
  .si-footer .container-fluid{ flex-direction: column; gap: .25rem; }
}