:root{
  --bg:#0b0f14; --panel:#111826; --ink:#eaf2ff; --muted:#96a2b3; --accent:#66e3ff; --good:#7ef7c1; --warn:#ffd166; --danger:#ff6b6b;
}
*{box-sizing:border-box}
body{margin:0;background:radial-gradient(1200px 600px at 10% -10%,#122032 0%,#0b0f14 45%,#0b0f14 100%);color:var(--ink);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Inter,Ubuntu,"Helvetica Neue",Arial}
a{color:var(--accent);text-decoration:none}
.wrap{max-width:980px;margin:24px auto;padding:20px;min-height:100vh}

/* Nav */
.nav{position:sticky;top:0;z-index:5;background:#0b0f14d9;backdrop-filter:blur(6px);border-bottom:1px solid #1a2740}
.nav-inner{max-width:980px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:12px 16px}
.brand{display:flex;align-items:center;gap:10px}
.logo{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,#66e3ff,#7ef7c1)}
.brand-title{font-weight:900;letter-spacing:.3px}
.brand-sub{color:var(--muted);font-size:12px;margin-left:8px}

h1{font-weight:800;letter-spacing:.3px;margin:0 0 8px;font-size:clamp(20px,3vw,28px)}
.card{background:linear-gradient(180deg,#121b29,#0c131e);border:1px solid #19263a;border-radius:18px;box-shadow:0 10px 30px rgba(0,0,0,.35);padding:18px}

/* Views */
.view{display:none}
.view.active{display:block}

/* Chat */
.chat-layout{display:grid;grid-template-rows:auto 1fr auto;gap:12px;height:min(70vh,580px)}
.chat-box{overflow:auto;border-radius:12px;border:1px solid #1b2a44;padding:12px;background:#0e1726}
.msg{display:flex;margin:8px 0}
.msg .bubble{padding:10px 12px;border-radius:12px;max-width:80%;white-space:pre-wrap}
.msg.user{justify-content:flex-end}
.msg.user .bubble{background:#193459;border:1px solid #284167}
.msg.bot .bubble{background:#0f1a2a;border:1px solid #1c2d49}
.chat-input{display:flex;gap:8px}
.chat-input input{flex:1;border-radius:10px;border:1px solid #1b2a44;background:#0e1624;color:var(--ink);padding:10px 12px}
.chat-input button{border:0;border-radius:10px;background:#172337;color:var(--ink);padding:10px 14px;font-weight:700}
.sys-hint{color:var(--muted);font-size:13px}

/* Timer section */
.controls{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:20px}
button{appearance:none;border:0;border-radius:12px;padding:12px 16px;background:#172337;color:var(--ink);font-weight:700;cursor:pointer;transition:transform .05s ease,background .2s}
button:hover{transform:translateY(-1px);background:#1b2941}
button.primary{background:linear-gradient(180deg,#1c314e,#14253e);border:1px solid #284167}
button.danger{background:linear-gradient(180deg,#42202a,#2a1218);border:1px solid #5e2b39}
button.ghost{background:#111b2a;border:1px solid #233450}
button:disabled{opacity:.55;cursor:not-allowed;filter:grayscale(30%)}
.grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
.now{display:flex;gap:16px;align-items:center}
.time{font-size:42px;font-weight:900;letter-spacing:1px}
.label{font-size:18px;font-weight:800}
.desc{color:var(--muted)}
.status{font-weight:900;text-transform:uppercase;letter-spacing:.12em}
.status.work{color:var(--good)}
.status.rest{color:var(--warn)}
.status.cool{color:#8fb3ff}
.bars{display:grid;gap:10px;margin-top:10px}
.bar{height:12px;background:#0e1624;border:1px solid #1b2a44;border-radius:10px;overflow:hidden}
.fill{height:100%;width:0%;background:linear-gradient(90deg,var(--accent),#7af0ff);transition:width .25s linear}
.bar.small .fill{background:linear-gradient(90deg,#7ef7c1,#63e0ff)}
.flex{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.list{max-height:460px;overflow:auto;border-radius:12px;border:1px solid #1b2a44}
.step{display:flex;gap:10px;padding:10px 12px;border-bottom:1px solid #132139;align-items:flex-start}
.step:last-child{border-bottom:0}
.step .t{min-width:54px;text-align:right;color:var(--muted)}
.step .n{font-weight:700}
.step .tag{margin-left:auto;font-size:12px;padding:2px 8px;border-radius:999px;border:1px solid #233450;color:#c9d6ea;align-self:flex-start}
.step.active{background:#0f1a2a}
.options{display:flex;gap:16px;align-items:center}
.options label{display:flex;gap:8px;align-items:center;color:var(--muted)}
footer{margin-top:16px;color:var(--muted);font-size:13px}
@media (max-width:860px){.grid{grid-template-columns:1fr}}

/* Modal (Payment + Disclaimer + New Exercise) */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;padding:18px;z-index:6}
.modal{max-width:600px;width:100%;background:#0f1a2a;border:1px solid #233450;border-radius:16px;padding:18px 18px 16px}
.modal h3{margin:0 0 6px;font-size:20px}
.modal .actions{display:flex;justify-content:flex-end;gap:8px;margin-top:10px}
.show{display:flex}
.muted{color:var(--muted)}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}

/* Payment modal polish */
.modal-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:8px}
.price-pill{display:inline-flex;align-items:center;gap:6px;border:1px solid #233450;background:#111b2a;border-radius:999px;padding:6px 10px;font-weight:800}
.price-pill small{font-weight:600;color:var(--muted)}
.divider{height:1px;background:#1b2a44;margin:12px 0}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:12px;color:var(--muted)}
.field input{width:100%;border-radius:10px;border:1px solid #1b2a44;background:#0e1624;color:#eaf2ff;padding:10px 12px}
.StripeElement{padding:12px;border-radius:10px;border:1px solid #1b2a44;background:#0e1624;color:#eaf2ff}
.StripeElement--focus{outline:0;border-color:#284167;box-shadow:0 0 0 2px rgba(102,227,255,.15)}
.StripeElement--invalid{border-color:#ff6b6b}
.help{font-size:12px;color:var(--muted)}
.modal-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:6px}
.modal-actions .left{display:flex;gap:10px;align-items:center}
.modal-actions .right{display:flex;gap:10px}
.btn-wide{width:100%}
.notice{background:#111b2a;border:1px solid #233450;border-radius:12px;padding:10px 12px;line-height:1.55}
.notice b{color:#eaf2ff}

/* Loading overlay */
.loading-backdrop{position:fixed;inset:0;background:rgba(3,8,16,.65);display:none;align-items:center;justify-content:center;z-index:7}
.loading-card{background:#0f1a2a;border:1px solid #233450;border-radius:14px;padding:18px;max-width:520px;width:calc(100% - 32px);text-align:center}
.spinner{width:36px;height:36px;border-radius:50%;border:4px solid #233450;border-top-color:#66e3ff;animation:spin .9s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}

/* Expiry badge */
.expiry-badge{font-size:12px;color:#c9d6ea;border:1px solid #233450;background:#111b2a;border-radius:999px;padding:6px 10px;white-space:nowrap}

/* Payment Request Button (Apple Pay / Google Pay) */
#paymentRequestContainer{margin-bottom:4px}
#paymentRequestContainer:empty{display:none}
.pay-divider{display:flex;align-items:center;gap:12px;margin:10px 0;color:var(--muted);font-size:13px}
.pay-divider::before,.pay-divider::after{content:'';flex:1;height:1px;background:#1b2a44}

/* ========================
   MOBILE OPTIMIZATIONS
======================== */
html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%}
body{padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}

/* Prevent iOS zoom on input focus — inputs must be ≥16px */
input,select,textarea{font-size:16px}

@media (max-width:600px){
  .wrap{padding:12px;margin:8px auto}
  h1{font-size:20px}

  /* Nav */
  .nav-inner{padding:10px 12px}
  .brand-sub{display:none}

  /* Chat */
  .chat-layout{height:min(65vh,480px)}
  .chat-input{gap:6px}
  .chat-input input{padding:12px;font-size:16px}
  .chat-input button{padding:12px 16px;min-height:44px}

  /* Timer */
  .controls{gap:6px;justify-content:center}
  .controls button{padding:10px 12px;font-size:13px;min-height:44px}
  .time{font-size:36px}
  .now{gap:12px;flex-wrap:wrap}
  .grid{gap:10px}
  .step{padding:10px 8px;gap:6px}
  .step .t{min-width:44px;font-size:14px}
  .step .n{font-size:14px}
  .options{flex-direction:column;align-items:flex-start;gap:10px}
  footer{font-size:12px}

  /* Modals — near full-screen on mobile */
  .modal-backdrop{padding:8px}
  .modal{padding:14px;border-radius:14px;max-height:90vh;overflow-y:auto}
  .modal h3{font-size:18px}
  .modal-head{flex-direction:column;align-items:flex-start;gap:8px}
  .modal-actions{flex-direction:column;gap:8px}
  .modal-actions .left,.modal-actions .right{width:100%;justify-content:stretch}
  .modal-actions .left{order:2}
  .modal-actions .right{order:1}
  .modal-actions button{width:100%;min-height:48px}
  .notice{font-size:13px;padding:10px}

  /* Buttons: minimum 44px touch target */
  button{min-height:44px}
}

/* Extra-small phones (iPhone SE, etc.) */
@media (max-width:380px){
  .time{font-size:30px}
  .controls button{font-size:12px;padding:8px 10px}
  .brand-title{font-size:14px}
}