/* ═══════════════════════════════════════════════
   TRITON Trace Element Dosing Calculator — Page-Specific Styles
   Global design system: ../global.css
   Prefix: te- (all calculator-specific classes)
   ═══════════════════════════════════════════════ */


/* ════════════════════════════════════════════════
   HERO — Compact static hero (tool page, no video)
   ════════════════════════════════════════════════ */
.hero-tool{
  min-height:55vh;height:auto;
  display:flex;flex-direction:column;justify-content:flex-end;
  background:
    radial-gradient(ellipse 70% 55% at 70% 35%, rgba(0,100,102,.3) 0%, transparent 60%),
    radial-gradient(ellipse 45% 50% at 15% 75%, rgba(3,47,79,.5) 0%, transparent 55%),
    var(--bp);
  padding-top:clamp(7rem,12vw,10rem)
}
.hero-tool .hero-ct{
  padding-bottom:clamp(4rem,6vw,6rem);
  display:block
}
.hero-tool .hero-t{font-size:clamp(2.8rem,6.5vw,5.5rem);max-width:22ch}
.hero-tool .hero-sub{max-width:62ch}


/* ════════════════════════════════════════════════
   TAB SYSTEM — Element category selector
   ════════════════════════════════════════════════ */
.te-tabs{
  display:flex;gap:0;
  border-bottom:2px solid rgba(133,255,199,.08);
  margin-bottom:clamp(2rem,4vw,3rem);
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:none
}
.te-tabs::-webkit-scrollbar{display:none}

.te-tab{
  font-family:var(--h);font-weight:700;
  font-size:clamp(.82rem,1vw,.92rem);
  letter-spacing:.08em;text-transform:uppercase;
  color:rgba(255,255,255,.45);
  padding:1rem 2rem;
  background:none;border:none;border-bottom:2px solid transparent;
  margin-bottom:-2px;cursor:pointer;
  white-space:nowrap;
  transition:all .35s cubic-bezier(.16,1,.3,1);
  position:relative
}
.te-tab:hover{color:rgba(255,255,255,.75)}
.te-tab.active{
  color:var(--aq);
  border-bottom-color:var(--aq)
}
.te-tab.active::after{
  content:'';position:absolute;
  bottom:-2px;left:0;right:0;height:2px;
  background:var(--aq);
  box-shadow:0 0 12px rgba(133,255,199,.3)
}

/* Tab panels */
.te-panel{display:none;animation:tePanelIn .4s ease-out}
.te-panel.active{display:block}
@keyframes tePanelIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}


/* ════════════════════════════════════════════════
   GLOBAL INPUT — Aquarium Volume (always visible)
   ════════════════════════════════════════════════ */
.te-global{
  max-width:420px;
  margin-bottom:clamp(2rem,4vw,3rem);
  padding:1.5rem 2rem;
  background:rgba(1,24,39,.75);
  border:1px solid rgba(133,255,199,.18);
  position:relative
}
.te-global::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,transparent,var(--aq),transparent);
  opacity:.5
}
.te-global-label{
  display:flex;align-items:center;gap:.8rem;
  margin-bottom:1rem
}
.te-global-label i{
  color:var(--aq);font-size:1.1rem
}
.te-global-label span{
  font-family:var(--h);font-weight:900;
  font-size:1rem;text-transform:uppercase;
  letter-spacing:.06em
}
.te-global-row{
  display:flex;align-items:center;gap:1rem
}
.te-global-row input{
  flex:1;max-width:200px;
  padding:.9rem 1rem;
  background:rgba(1,24,39,.8);
  border:1px solid rgba(133,255,199,.12);
  color:var(--w);font-family:var(--h);
  font-size:1.2rem;font-weight:700;
  letter-spacing:.02em;
  transition:border-color .3s,box-shadow .3s;
  -moz-appearance:textfield
}
.te-global-row input::-webkit-outer-spin-button,
.te-global-row input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.te-global-row input::placeholder{color:rgba(255,255,255,.45)}
.te-global-row input:focus{
  outline:none;
  border-color:var(--aq);
  box-shadow:0 0 20px rgba(133,255,199,.08)
}
.te-global-row input.invalid{
  border-color:#ff5555;
  box-shadow:0 0 12px rgba(255,85,85,.12)
}
.te-global-unit{
  font-family:var(--h);font-weight:700;
  font-size:1rem;color:rgba(255,255,255,.5);
  letter-spacing:.04em
}


/* ════════════════════════════════════════════════
   ELEMENT CARD GRID
   ════════════════════════════════════════════════ */
.te-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1.5rem
}

.te-card{
  background:rgba(1,24,39,.75);
  border:1px solid rgba(133,255,199,.1);
  padding:clamp(1.5rem,2.5vw,2rem);
  position:relative;overflow:hidden;
  transition:border-color .3s
}
.te-card:hover{border-color:rgba(133,255,199,.25)}
.te-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,rgba(133,255,199,.2),transparent);
  opacity:0;transition:opacity .3s
}
.te-card:hover::before{opacity:1}

/* Card header: image + element name */
.te-card-head{
  display:flex;align-items:center;gap:1rem;
  margin-bottom:1.2rem;padding-bottom:1rem;
  border-bottom:1px solid rgba(133,255,199,.06)
}
.te-card-img{
  width:64px;height:64px;
  object-fit:contain;flex-shrink:0;
  filter:drop-shadow(0 4px 12px rgba(0,0,0,.3));
  transition:transform .4s cubic-bezier(.16,1,.3,1)
}
.te-card:hover .te-card-img{transform:scale(1.05)}
.te-card-name{
  font-family:var(--h);font-weight:900;
  font-size:1.05rem;text-transform:uppercase;
  letter-spacing:.04em;line-height:1.2
}
.te-card-symbol{
  display:inline-block;
  font-family:var(--h);font-weight:700;
  font-size:.78rem;letter-spacing:.1em;
  color:var(--aq);opacity:.7;
  margin-left:.4rem
}

/* Card inputs */
.te-card-fields{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1rem;
  margin-bottom:1.2rem
}
.te-field label{
  display:block;
  font-family:var(--h);font-weight:700;
  font-size:.72rem;letter-spacing:.14em;
  text-transform:uppercase;
  color:rgba(255,255,255,.85);
  margin-bottom:.4rem
}
.te-field-wrap{
  display:flex;align-items:center;
  background:rgba(1,24,39,.8);
  border:1px solid rgba(133,255,199,.12);
  transition:border-color .3s,box-shadow .3s
}
.te-field-wrap:focus-within{
  border-color:var(--aq);
  box-shadow:0 0 20px rgba(133,255,199,.08)
}
.te-field-wrap.invalid{
  border-color:#ff5555;
  box-shadow:0 0 12px rgba(255,85,85,.12)
}
.te-field-wrap input{
  flex:1;min-width:0;
  padding:.7rem .8rem;
  background:transparent;border:none;
  color:var(--w);font-family:var(--h);
  font-size:1.1rem;font-weight:700;
  letter-spacing:.02em;
  -moz-appearance:textfield
}
.te-field-wrap input::-webkit-outer-spin-button,
.te-field-wrap input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.te-field-wrap input::placeholder{color:rgba(255,255,255,.35);font-weight:400}
.te-field-wrap input:focus{outline:none}
.te-field-unit{
  font-family:var(--h);font-weight:600;
  font-size:.72rem;letter-spacing:.06em;
  color:rgba(255,255,255,.35);
  padding-right:.8rem;white-space:nowrap;
  flex-shrink:0
}

/* Card results */
.te-card-results{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:.8rem
}
.te-result{
  padding:.8rem 1rem;
  background:rgba(0,100,102,.1);
  border:1px solid rgba(133,255,199,.12);
  position:relative
}
.te-result::before{
  content:'';position:absolute;left:0;top:0;bottom:0;
  width:2px;background:var(--aq);opacity:.5
}
.te-result-label{
  font-family:var(--h);font-weight:700;
  font-size:.68rem;letter-spacing:.12em;
  text-transform:uppercase;
  color:rgba(255,255,255,.55);
  margin-bottom:.2rem;
  white-space:nowrap
}
.te-result-value{
  font-family:var(--h);font-weight:900;
  font-size:clamp(1.3rem,2vw,1.6rem);
  color:var(--aq);letter-spacing:-.01em;
  line-height:1
}
.te-result-unit{
  font-size:.82rem;color:rgba(255,255,255,.5);
  font-weight:400;margin-left:.2rem
}


/* ════════════════════════════════════════════════
   HOW IT WORKS — 3 Steps
   ════════════════════════════════════════════════ */
.te-steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:2rem
}
.te-step{
  text-align:center;
  padding:2rem 1.5rem;
  position:relative
}
.te-step-num{
  font-family:var(--h);font-weight:900;
  font-size:clamp(3.5rem,6vw,5rem);
  color:var(--aq);opacity:.12;
  line-height:.8;margin-bottom:.8rem
}
.te-step-icon{
  font-size:1.6rem;color:var(--aq);
  margin-bottom:1rem
}
.te-step h3{
  font-family:var(--h);font-weight:900;
  font-size:1.05rem;text-transform:uppercase;
  letter-spacing:.04em;margin-bottom:.6rem
}
.te-step p{
  font-size:1rem;line-height:1.6;
  color:rgba(255,255,255,.65)
}


/* ════════════════════════════════════════════════
   IMPORTANT NOTES
   ════════════════════════════════════════════════ */
.te-notes{
  display:grid;gap:1rem;
  max-width:820px;margin:0 auto
}
.te-note{
  display:flex;align-items:flex-start;gap:1rem;
  padding:1.2rem 1.5rem;
  background:rgba(0,100,102,.08);
  border-left:3px solid rgba(133,255,199,.25)
}
.te-note i{
  flex-shrink:0;font-size:1.1rem;
  color:var(--aq);margin-top:.15rem
}
.te-note p{
  font-size:1rem;line-height:1.6;
  color:rgba(255,255,255,.75)
}
.te-note strong{color:var(--w)}


/* ════════════════════════════════════════════════
   CTA — Final conversion section
   ════════════════════════════════════════════════ */
.te-cta{
  background:linear-gradient(180deg,var(--bp) 0%,rgba(0,100,102,.25) 50%,var(--bp) 100%);
  text-align:center;
  position:relative
}
.te-cta::before{
  content:'';position:absolute;inset:0;pointer-events:none;opacity:.03;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='97'%3E%3Cpath d='M28 1l27 15.5v31L28 63 1 47.5v-31z' fill='none' stroke='%2385FFC7' stroke-width='.4'/%3E%3C/svg%3E");
  background-size:56px 97px
}
.te-cta .section-h{margin-bottom:1rem}
.te-cta .s-sub{margin-bottom:clamp(2rem,4vw,3rem)}
.te-cta-btns{
  display:flex;gap:1.2rem;
  justify-content:center;flex-wrap:wrap
}
.te-cta-sub{max-width:52ch;margin-left:auto;margin-right:auto}


/* ════════════════════════════════════════════════
   RESPONSIVE — Tablet (<=1024px)
   ════════════════════════════════════════════════ */
@media(max-width:1024px){
  .te-steps{grid-template-columns:1fr 1fr}
  .te-steps .te-step:last-child{grid-column:1/-1;max-width:50%;margin:0 auto}
}

/* ════════════════════════════════════════════════
   RESPONSIVE — Mobile (<=768px)
   ════════════════════════════════════════════════ */
@media(max-width:768px){
  .hero-tool{min-height:auto;padding-top:clamp(6rem,10vw,8rem)}
  .hero-tool .hero-ct{padding-bottom:clamp(3rem,5vw,4rem)}

  .te-tabs{gap:0}
  .te-tab{padding:.8rem 1.2rem;font-size:.78rem}

  .te-global{padding:1.2rem 1.5rem}
  .te-global-row{flex-direction:column;align-items:stretch}
  .te-global-row input{max-width:none}

  .te-grid{grid-template-columns:1fr}

  .te-card-fields{grid-template-columns:1fr}
  .te-card-results{grid-template-columns:1fr}

  .te-steps{grid-template-columns:1fr}
  .te-steps .te-step:last-child{grid-column:auto;max-width:none}

  .te-cta-btns{flex-direction:column;align-items:center}
  .te-cta-btns .btn{width:100%}
}

/* ════════════════════════════════════════════════
   RESPONSIVE — Small mobile (<=480px)
   ════════════════════════════════════════════════ */
@media(max-width:480px){
  .te-card{padding:1.2rem}
  .te-card-img{width:50px;height:50px}
  .te-tab{padding:.7rem 1rem;font-size:.72rem;letter-spacing:.06em}
  .te-global{padding:1rem 1.2rem}
}