/* ============================================================
   SparkStudy — Shared Design System
   Used by all standalone pages (pricing, terms, tools, etc.)
   ============================================================ */

/* ── Tokens ──────────────────────────────────────────────── */
:root {
  --bg:       #0d1117;
  --bg2:      #161b22;
  --bg3:      #1c2128;
  --border:   #21262d;
  --border2:  #30363d;
  --text:     #e6edf3;
  --muted:    #8b949e;
  --faint:    #484f58;
  --accent:   #f59e0b;
  --accent2:  #58a6ff;
  --green:    #10b981;
  --red:      #ef4444;
  --purple:   #a78bfa;
  --radius:   12px;
  --radius-sm:8px;
  --radius-lg:16px;
  --shadow:   0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:0 8px 40px rgba(0,0,0,0.6);
  --transition:all 0.18s ease;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --max-w:1400px;

  /* ── Compatibility aliases (matches styles.css variable names) ── */
  --bg-primary:   var(--bg);
  --bg-secondary: var(--bg2);
  --bg-card:      var(--bg2);
  --bg-input:     var(--bg3);
  --text-primary: var(--text);
  --text-secondary:var(--muted);
  --text-muted:   var(--faint);
  --accent-soft:  rgba(245,158,11,0.1);
  --accent-hover: #fbbf24;
}

/* ── Reset ───────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  min-height:100vh;
  display:flex;
  flex-direction:column;
  overflow-x:hidden;
}
a{color:var(--accent);text-decoration:none;}
a:hover{color:#fbbf24;}
img{max-width:100%;display:block;}
button{font-family:var(--font);cursor:pointer;}

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar{width:5px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:var(--border2);border-radius:4px;}
::-webkit-scrollbar-thumb:hover{background:var(--accent);}

/* ── Navbar ──────────────────────────────────────────────── */
.sparky-nav{
  position:sticky;top:0;z-index:9000;
  background:rgba(13,17,23,0.96);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  height:60px;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 2rem;
  gap:1rem;
}
.sn-logo{
  font-size:1.2rem;font-weight:800;color:var(--accent);
  text-decoration:none;display:flex;align-items:center;gap:0.55rem;
  flex-shrink:0;letter-spacing:-0.01em;
  transition:opacity 0.2s;
}
.sn-logo:hover{opacity:0.85;color:var(--accent);}
.sn-logo-icon{
  width:28px;height:28px;
  background:linear-gradient(135deg,#f59e0b,#f97316);
  border-radius:7px;
  display:flex;align-items:center;justify-content:center;
  font-size:0.9rem;color:#000;font-weight:900;
  flex-shrink:0;
}
.sn-links{
  display:flex;align-items:center;gap:2px;
}
.sn-link{
  color:var(--muted);text-decoration:none;
  font-size:0.875rem;font-weight:500;
  padding:0.38rem 0.7rem;border-radius:7px;
  transition:color 0.15s,background 0.15s;
  white-space:nowrap;
}
.sn-link:hover{color:var(--text);background:rgba(255,255,255,0.05);}
.sn-link.sn-active{color:var(--accent);background:rgba(245,158,11,0.09);}
.sn-link.sn-cta{
  background:var(--accent);color:#000;font-weight:700;
  padding:0.38rem 0.9rem;margin-left:0.4rem;
}
.sn-link.sn-cta:hover{background:#fbbf24;color:#000;}
.sn-link.sn-logout{color:#f85149;}
.sn-link.sn-logout:hover{color:#ff7b72;background:rgba(248,81,73,0.08);}
.sn-link.sn-admin{color:var(--accent);font-weight:600;}
.sn-burger{
  display:none;flex-direction:column;gap:5px;
  background:none;border:none;cursor:pointer;padding:6px;flex-shrink:0;
}
.sn-burger span{
  display:block;width:22px;height:2px;
  background:var(--muted);border-radius:2px;
  transition:var(--transition);
}
@media(max-width:768px){
  .sn-burger{display:flex;}
  .sn-links{
    display:none;
    position:absolute;top:60px;left:0;right:0;
    background:var(--bg);
    border-bottom:1px solid var(--border);
    flex-direction:column;padding:0.6rem;gap:2px;
  }
  .sn-links.sn-open{display:flex;}
  .sn-link{padding:0.6rem 1rem;width:100%;border-radius:7px;}
  .sn-link.sn-cta{margin:0.25rem 0 0;text-align:center;}
}

/* ── Page Wrapper ────────────────────────────────────────── */
.page-body{flex:1;}
:where(.container){max-width:var(--max-w);margin:0 auto;padding:0 1.5rem;}
:where(.container-sm){max-width:760px;margin:0 auto;padding:0 1.5rem;}
:where(.container-xs){max-width:600px;margin:0 auto;padding:0 1.5rem;}

/* ── Page Header ─────────────────────────────────────────── */
.page-hero{
  padding:4rem 1.5rem 2.5rem;
  text-align:center;
  max-width:var(--max-w);
  margin:0 auto;
}
.page-hero .badge{
  display:inline-block;
  background:rgba(245,158,11,0.12);
  border:1px solid rgba(245,158,11,0.3);
  color:var(--accent);
  font-size:0.72rem;font-weight:700;
  padding:4px 14px;border-radius:20px;
  text-transform:uppercase;letter-spacing:0.6px;
  margin-bottom:1.25rem;
}
.page-hero h1{
  font-size:clamp(1.8rem,4vw,2.75rem);
  font-weight:800;line-height:1.15;
  letter-spacing:-0.02em;
  margin-bottom:0.9rem;
}
.page-hero h1 .grad{
  background:linear-gradient(135deg,#f59e0b,#f97316);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.page-hero p{
  font-size:1.05rem;color:var(--muted);
  max-width:560px;margin:0 auto;line-height:1.7;
}

/* ── Cards ───────────────────────────────────────────────── */
.card{
  background:var(--bg2);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:1.5rem;
  transition:border-color 0.2s,box-shadow 0.2s;
}
.card:hover{border-color:var(--border2);}
.card.card-hover:hover{
  border-color:rgba(245,158,11,0.35);
  box-shadow:0 0 0 1px rgba(245,158,11,0.12),var(--shadow-md);
}
.card-lg{padding:2rem;}
.card-featured{
  border-color:rgba(245,158,11,0.4);
  background:linear-gradient(135deg,var(--bg2) 0%,rgba(245,158,11,0.04) 100%);
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:0.4rem;
  font-family:var(--font);font-weight:600;font-size:0.9rem;
  padding:0.65rem 1.4rem;border-radius:var(--radius-sm);
  border:none;cursor:pointer;
  transition:var(--transition);text-decoration:none;
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:#000;}
.btn-primary:hover{background:#fbbf24;color:#000;transform:translateY(-1px);box-shadow:0 4px 16px rgba(245,158,11,0.3);}
.btn-secondary{background:transparent;color:var(--text);border:1px solid var(--border2);}
.btn-secondary:hover{border-color:var(--accent);color:var(--accent);background:rgba(245,158,11,0.06);}
.btn-ghost{background:transparent;color:var(--muted);border:none;padding:0.5rem 0.75rem;}
.btn-ghost:hover{color:var(--text);background:rgba(255,255,255,0.05);}
.btn-danger{background:transparent;color:var(--red);border:1px solid rgba(239,68,68,0.3);}
.btn-danger:hover{background:rgba(239,68,68,0.08);border-color:var(--red);}
.btn-lg{padding:0.85rem 2rem;font-size:1rem;border-radius:var(--radius);}
.btn-full{width:100%;}
.btn:disabled{opacity:0.45;cursor:not-allowed;transform:none!important;}

/* ── Form Inputs ─────────────────────────────────────────── */
input[type="text"],input[type="email"],input[type="password"],
input[type="number"],input[type="tel"],input[type="url"],
textarea,select{
  font-family:var(--font);
  background:var(--bg3);
  border:1px solid var(--border2);
  border-radius:var(--radius-sm);
  color:var(--text);
  padding:0.65rem 0.9rem;
  font-size:0.9rem;
  width:100%;
  transition:border-color 0.15s,box-shadow 0.15s;
  outline:none;
}
input:focus,textarea:focus,select:focus{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(245,158,11,0.15);
}
input::placeholder,textarea::placeholder{color:var(--faint);}
input:disabled,textarea:disabled{opacity:0.45;cursor:not-allowed;}
select{
  cursor:pointer;-webkit-appearance:none;-moz-appearance:none;appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;
  padding-right:36px;
}
label{display:block;font-size:0.85rem;font-weight:600;color:var(--muted);margin-bottom:0.4rem;}
.form-group{margin-bottom:1.1rem;}
.field-hint{font-size:0.78rem;color:var(--faint);margin-top:0.3rem;}

/* ── Badges & Tags ───────────────────────────────────────── */
.badge{
  display:inline-flex;align-items:center;gap:0.3rem;
  font-size:0.72rem;font-weight:700;padding:3px 10px;border-radius:20px;
  text-transform:uppercase;letter-spacing:0.4px;
}
.badge-green{background:rgba(16,185,129,0.15);color:var(--green);border:1px solid rgba(16,185,129,0.25);}
.badge-amber{background:rgba(245,158,11,0.12);color:var(--accent);border:1px solid rgba(245,158,11,0.25);}
.badge-blue{background:rgba(88,166,255,0.12);color:var(--accent2);border:1px solid rgba(88,166,255,0.25);}
.badge-red{background:rgba(239,68,68,0.1);color:var(--red);border:1px solid rgba(239,68,68,0.2);}

/* ── Alerts ──────────────────────────────────────────────── */
.alert{
  padding:0.9rem 1.1rem;border-radius:var(--radius-sm);
  font-size:0.9rem;line-height:1.55;border-left:3px solid;
}
.alert-info{background:rgba(88,166,255,0.07);border-color:var(--accent2);color:#93c5fd;}
.alert-success{background:rgba(16,185,129,0.08);border-color:var(--green);color:#6ee7b7;}
.alert-warning{background:rgba(245,158,11,0.08);border-color:var(--accent);color:#fcd34d;}
.alert-error{background:rgba(239,68,68,0.08);border-color:var(--red);color:#fca5a5;}

/* ── Divider ─────────────────────────────────────────────── */
.divider{border:none;border-top:1px solid var(--border);margin:2rem 0;}

/* ── Section headings ────────────────────────────────────── */
.section-title{
  font-size:1.5rem;font-weight:700;letter-spacing:-0.01em;
  margin-bottom:0.5rem;
}
.section-subtitle{color:var(--muted);font-size:0.95rem;margin-bottom:1.75rem;}

/* ── Check list ──────────────────────────────────────────── */
.check-list{list-style:none;}
.check-list li{
  display:flex;align-items:flex-start;gap:0.65rem;
  padding:0.55rem 0;border-bottom:1px solid var(--border);
  font-size:0.9rem;color:var(--muted);
}
.check-list li:last-child{border-bottom:none;}
.check-list li::before{
  content:"✓";color:var(--green);font-weight:700;
  font-size:0.85rem;margin-top:1px;flex-shrink:0;
}

/* ── Table ───────────────────────────────────────────────── */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--border);}
.ss-table{width:100%;border-collapse:collapse;background:var(--bg2);}
.ss-table thead{background:rgba(245,158,11,0.07);border-bottom:1px solid var(--border2);}
.ss-table th{
  padding:1rem 1.25rem;text-align:left;
  font-size:0.82rem;font-weight:700;text-transform:uppercase;
  letter-spacing:0.04em;color:var(--muted);
}
.ss-table td{
  padding:0.9rem 1.25rem;border-bottom:1px solid var(--border);
  color:var(--muted);font-size:0.9rem;
}
.ss-table tr:last-child td{border-bottom:none;}
.ss-table tbody tr:hover{background:rgba(255,255,255,0.02);}
.ss-table .cat-row td{
  font-weight:700;color:var(--text);font-size:0.82rem;
  text-transform:uppercase;letter-spacing:0.04em;
  background:rgba(88,166,255,0.04);padding:0.65rem 1.25rem;
  border-bottom:1px solid var(--border);
}
.check-y{color:var(--green);font-weight:700;font-size:1rem;}
.check-n{color:var(--faint);}

/* ── FAQ accordion ───────────────────────────────────────── */
.faq-item{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius-sm);margin-bottom:0.6rem;overflow:hidden;
  transition:border-color 0.15s;
}
.faq-item:hover{border-color:var(--border2);}
.faq-q{
  padding:1.1rem 1.25rem;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;
  font-weight:600;font-size:0.92rem;gap:1rem;
  user-select:none;
}
.faq-q svg{flex-shrink:0;transition:transform 0.25s;color:var(--muted);}
.faq-item.open .faq-q svg{transform:rotate(180deg);color:var(--accent);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height 0.3s ease,padding 0.2s ease;
  padding:0 1.25rem;
}
.faq-item.open .faq-a{max-height:600px;padding:0 1.25rem 1.25rem;}
.faq-a p{color:var(--muted);font-size:0.88rem;line-height:1.75;}

/* ── Full Footer ─────────────────────────────────────────── */
.sparky-footer{
  background:#010409;
  border-top:1px solid var(--border);
  padding:3rem 2rem 1.75rem;
  margin-top:auto;
}
.sf-grid{
  max-width:var(--max-w);margin:0 auto;
  display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:2rem;
  margin-bottom:2.5rem;
}
.sf-brand-name{
  font-size:1.1rem;font-weight:800;color:var(--text);
  display:flex;align-items:center;gap:0.5rem;margin-bottom:0.6rem;
}
.sf-brand-name span{color:var(--accent);}
.sf-brand p{font-size:0.82rem;color:var(--faint);line-height:1.65;max-width:240px;}
.sf-col h4{
  font-size:0.72rem;font-weight:700;color:var(--muted);
  text-transform:uppercase;letter-spacing:0.6px;
  margin-bottom:0.85rem;
}
.sf-col a{
  display:block;color:var(--faint);text-decoration:none;
  font-size:0.85rem;margin-bottom:0.45rem;
  transition:color 0.15s;
}
.sf-col a:hover{color:var(--accent);}
.sf-bottom{
  border-top:1px solid var(--border);
  padding-top:1.25rem;
  max-width:var(--max-w);margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:0.75rem;
  font-size:0.78rem;color:var(--faint);
}
.sf-bottom a{color:var(--faint);text-decoration:none;transition:color 0.15s;}
.sf-bottom a:hover{color:var(--muted);}
.sf-bottom-links{display:flex;gap:1.25rem;flex-wrap:wrap;}
@media(max-width:900px){
  .sf-grid{grid-template-columns:1fr 1fr;gap:2rem;}
}
@media(max-width:560px){
  .sf-grid{grid-template-columns:1fr;}
  .sf-bottom{flex-direction:column;align-items:flex-start;gap:0.5rem;}
}

/* ── Minimal Footer (app-interior pages) ────────────────── */
.sparky-footer-min{
  border-top:1px solid var(--border);
  padding:1.1rem 1.5rem;
  text-align:center;
  font-size:0.78rem;color:var(--faint);
}
.sparky-footer-min a{color:var(--faint);text-decoration:none;margin:0 0.5rem;}
.sparky-footer-min a:hover{color:var(--muted);}

/* ── Range Slider ────────────────────────────────────────── */
input[type="range"]{
  -webkit-appearance:none;appearance:none;
  width:100%;height:5px;
  background:var(--border2);border-radius:3px;
  outline:none;border:none;padding:0;cursor:pointer;
}
input[type="range"]::-webkit-slider-thumb{
  -webkit-appearance:none;
  width:18px;height:18px;border-radius:50%;
  background:var(--accent);cursor:pointer;
  border:2px solid var(--bg);
  box-shadow:0 1px 6px rgba(0,0,0,0.4);
  transition:transform 0.15s;
}
input[type="range"]::-webkit-slider-thumb:hover{transform:scale(1.15);}
input[type="range"]::-moz-range-thumb{
  width:18px;height:18px;border-radius:50%;
  background:var(--accent);cursor:pointer;
  border:2px solid var(--bg);
}

/* ── Utility ─────────────────────────────────────────────── */
.text-muted{color:var(--muted);}
.text-accent{color:var(--accent);}
.text-green{color:var(--green);}
.text-red{color:var(--red);}
.text-center{text-align:center;}
.mt-1{margin-top:0.5rem;}
.mt-2{margin-top:1rem;}
.mt-3{margin-top:1.5rem;}
.mt-4{margin-top:2rem;}
.mt-6{margin-top:3rem;}
.mt-8{margin-top:4rem;}
.mb-2{margin-bottom:1rem;}
.mb-4{margin-bottom:2rem;}
.gap-1{gap:0.5rem;}
.gap-2{gap:1rem;}
.flex{display:flex;}
.flex-col{flex-direction:column;}
.items-center{align-items:center;}
.justify-between{justify-content:space-between;}
.flex-wrap{flex-wrap:wrap;}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;}
@media(max-width:768px){
  .grid-4,.grid-3{grid-template-columns:repeat(2,1fr);}
  .grid-2{grid-template-columns:1fr;}
}
@media(max-width:480px){
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr;}
}

/* ── Small phones (380px and below) ─────────────────────── */
@media(max-width:380px){
  html{font-size:14px;}
  :where(.container),:where(.container-sm),:where(.container-xs){padding:0 0.75rem;}
}

/* ── Touch targets & iOS zoom prevention ────────────────── */
@media(max-width:768px){
  /* Prevent iOS from zooming into inputs */
  input,select,textarea{font-size:16px !important;}
  /* More touch-friendly tap targets on mobile */
  .btn{min-height:46px;}
  .btn-sm{min-height:40px;}
}