/* ============================================================
   insulin-site / style.css  v4
   ============================================================ */
:root {
  --bg:#0d1117; --surface:#161b22; --surface2:#1c2230; --border:#2a3244;
  --accent:#3fb68e; --accent2:#5bc4a0; --warn:#e8a84c; --danger:#e05c5c;
  --text:#e6edf3; --muted:#7d8ea8; --shadow:0 2px 12px rgba(0,0,0,.4);
  --mono:'IBM Plex Mono',monospace; --sans:'IBM Plex Sans',sans-serif; --max:480px;
}
[data-theme="light"] {
  --bg:#f4f6f9; --surface:#fff; --surface2:#eef1f5; --border:#d0d7e3;
  --accent:#1f9b72; --accent2:#28a882; --warn:#c47c10; --danger:#c0392b;
  --text:#1a202c; --muted:#5a6a80; --shadow:0 2px 12px rgba(0,0,0,.08);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--bg);color:var(--text);min-height:100dvh;line-height:1.6;transition:background .2s,color .2s}

/* ── Nav ── */
.nav{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 90%,transparent);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);padding:0 16px;transition:background .2s,border-color .2s}
.nav-inner{max-width:var(--max);margin:0 auto;display:flex;align-items:center;justify-content:space-between;height:52px}
.nav-logo{font-family:var(--mono);font-size:15px;font-weight:500;color:var(--accent);text-decoration:none;letter-spacing:-.3px;flex-shrink:0}
.nav-logo span{color:var(--muted)}
.nav-links{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;align-items:center}
.nav-links::-webkit-scrollbar{display:none}
.nav-link{font-size:12px;color:var(--muted);text-decoration:none;padding:6px 9px;border-radius:7px;transition:all .15s;font-weight:500;white-space:nowrap}
.nav-link:hover,.nav-link.active{color:var(--text);background:var(--surface2)}

/* ── Page ── */
.page{max-width:var(--max);margin:0 auto;padding:14px 16px 100px;display:flex;flex-direction:column;gap:12px}

/* ── Cards ── */
.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px;box-shadow:var(--shadow);transition:background .2s,border-color .2s}
.card-label{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-family:var(--mono);margin-bottom:12px;font-weight:500}

/* ── Prose ── */
.prose h1{font-size:22px;font-weight:600;letter-spacing:-.4px;margin-bottom:4px}
.prose h2{font-size:15px;font-weight:600;color:var(--accent2);margin:20px 0 8px}
.prose h3{font-size:13px;font-weight:600;color:var(--accent);margin:14px 0 6px}
.prose hr{border:none;border-top:1px solid var(--border);margin:20px 0}
.prose ol{padding-left:18px;margin-bottom:10px}
.prose ol li{font-size:14px;color:var(--muted);line-height:1.7;margin-bottom:4px}
.prose p{font-size:14px;color:var(--muted);line-height:1.7;margin-bottom:10px}
.prose p strong{color:var(--text);font-weight:600}
.prose ul{padding-left:18px;margin-bottom:10px}
.prose ul li{font-size:14px;color:var(--muted);line-height:1.7;margin-bottom:4px}
.prose a{color:var(--accent);text-decoration:none}
.prose a:hover{text-decoration:underline}
.prose .date{font-size:11px;color:var(--muted);font-family:var(--mono)}

/* ── Inputs ── */
.input-row{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px}
.input-row:last-child{margin-bottom:0}
.input-icon{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;margin-top:2px}
.icon-glucose{background:rgba(63,182,142,.12)}
.icon-carb{background:rgba(91,196,160,.1)}
.icon-target{background:rgba(232,168,76,.12)}
.icon-params{background:rgba(120,160,220,.12)}
.card-label-row{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.card-label-row .card-label{margin-bottom:0}
.input-group{flex:1;min-width:0}
.input-group label{display:block;font-size:11px;color:var(--muted);margin-bottom:4px;font-weight:500}
.input-wrap{position:relative;display:flex;align-items:center}
.input-wrap input{width:100%;background:var(--surface2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:var(--mono);font-size:20px;font-weight:500;padding:10px 56px 10px 14px;outline:none;transition:border-color .15s,background .2s;-webkit-appearance:none}
.input-wrap input:focus{border-color:var(--accent)}
.input-wrap input::placeholder{color:var(--border)}
.input-wrap input.input-error,.setting-item input.input-error{border-color:var(--danger)!important;background:rgba(224,92,92,.06)!important}
.field-error{font-size:10px;color:var(--danger);margin-top:4px;font-family:var(--mono);animation:slideIn .15s ease}
.input-unit{position:absolute;right:12px;font-family:var(--mono);font-size:11px;color:var(--muted);pointer-events:none;white-space:nowrap}
.glucose-zone{height:3px;border-radius:2px;margin-top:6px;transition:background .3s}

.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.setting-item{display:flex;flex-direction:column;gap:4px}
.setting-item label{font-size:10px;color:var(--muted);font-family:var(--mono)}
.setting-item input{background:var(--surface2);border:1px solid var(--border);border-radius:7px;color:var(--text);font-family:var(--mono);font-size:14px;font-weight:500;padding:8px;text-align:center;outline:none;width:100%;-webkit-appearance:none;transition:border-color .15s,background .2s}
.setting-item input:focus{border-color:var(--accent)}
.setting-hint{font-size:9px;color:var(--muted);opacity:.7;line-height:1.3;margin-top:2px}

.unit-toggle{display:flex;position:relative;background:var(--surface2);border-radius:8px;padding:3px;border:1px solid var(--border);flex-shrink:0}
.toggle-pill{position:absolute;top:3px;left:3px;width:calc(50% - 3px);height:calc(100% - 6px);background:var(--accent);border-radius:6px;transition:transform .28s cubic-bezier(.4,0,.2,1);pointer-events:none;z-index:0}
.unit-toggle[data-active="mgdl"] .toggle-pill{transform:translateX(calc(100% + 3px))}
@media(prefers-reduced-motion:reduce){.toggle-pill{transition:none}}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.unit-btn{position:relative;z-index:1;flex:1;font-family:var(--mono);font-size:11px;padding:5px 10px;border-radius:5px;border:none;background:none;color:var(--muted);cursor:pointer;transition:color .28s ease;font-weight:500;white-space:nowrap}
.unit-btn.active{background:none;color:#fff}
[data-theme="light"] .unit-btn.active{color:#fff}

/* ── Banners ── */
.offline-banner{background:rgba(232,168,76,.1);border:1px solid rgba(232,168,76,.3);border-radius:8px;padding:8px 12px;font-size:12px;color:var(--warn);text-align:center;display:none}
.offline-banner.show{display:block}
.install-banner{background:rgba(63,182,142,.08);border:1px solid rgba(63,182,142,.25);border-radius:10px;padding:10px 14px;display:none;align-items:center;gap:10px}
.install-banner.show{display:flex}
.install-text{flex:1;font-size:12px;color:var(--accent2);line-height:1.4}
.install-btn{background:var(--accent);color:#000;border:none;border-radius:7px;font-size:12px;font-weight:600;font-family:var(--sans);padding:7px 14px;cursor:pointer;white-space:nowrap;flex-shrink:0}
.install-close{background:none;border:none;color:var(--muted);font-size:16px;cursor:pointer;padding:0 2px;flex-shrink:0}
.disclaimer{background:rgba(232,168,76,.08);border:1px solid rgba(232,168,76,.3);border-radius:10px;padding:10px 12px;font-size:11px;color:var(--warn);line-height:1.5}
.disclaimer strong{font-weight:600}

/* ── Result ── */
.result-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;display:none;box-shadow:var(--shadow)}
.result-card.visible{display:block;animation:slideIn .25s ease}
.result-main{padding:20px 20px 16px;text-align:center;border-bottom:1px solid var(--border)}
.result-label{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;font-family:var(--mono);margin-bottom:8px}
.result-value{font-family:var(--mono);font-size:64px;font-weight:300;line-height:1;color:var(--accent);letter-spacing:-2px}
.result-unit{font-size:16px;color:var(--muted);margin-top:4px;font-family:var(--mono)}
.result-time{font-size:10px;color:var(--muted);margin-top:6px;font-family:var(--mono);opacity:.6}
.result-breakdown{padding:14px 20px;display:flex;flex-direction:column;gap:8px}
.breakdown-row{display:flex;justify-content:space-between;align-items:center;font-size:13px}
.breakdown-name{color:var(--muted)}
.breakdown-val{font-family:var(--mono);font-weight:500;font-size:14px}
.breakdown-val.positive{color:var(--accent2)}
.breakdown-val.negative{color:var(--danger)}
.breakdown-val.neutral{color:var(--muted)}
.breakdown-divider{height:1px;background:var(--border);margin:2px 0}
.no-dose{padding:16px 20px;text-align:center;font-size:14px;color:var(--accent2);line-height:1.6}

.level-badge{display:inline-block;font-size:10px;font-family:var(--mono);padding:2px 7px;border-radius:4px;margin-left:6px;vertical-align:middle;font-weight:500}
.level-low{background:rgba(91,196,160,.15);color:#2e9e78}
.level-ok{background:rgba(63,182,142,.15);color:#1f9b72}
.level-high{background:rgba(232,168,76,.15);color:var(--warn)}
.level-very-high{background:rgba(224,92,92,.15);color:var(--danger)}

/* ── Buttons ── */
.calc-btn{background:var(--accent);color:#fff;font-family:var(--sans);font-size:16px;font-weight:600;border:none;border-radius:14px;padding:17px;width:100%;cursor:pointer;transition:opacity .15s,transform .1s;letter-spacing:-.2px}
[data-theme="light"] .calc-btn{color:#000}
.calc-btn:active{transform:scale(.97);opacity:.85}

.history-toggle{background:none;border:1px solid var(--border);color:var(--muted);font-family:var(--sans);font-size:12px;border-radius:8px;padding:8px 14px;cursor:pointer;width:100%;transition:all .15s;display:flex;align-items:center;justify-content:center;gap:6px}
.history-toggle:active{border-color:var(--accent);color:var(--accent)}

/* ── History ── */
.history-panel{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;display:none;box-shadow:var(--shadow)}
.history-panel.visible{display:block}
.history-header{padding:12px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}
.history-title{font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);font-family:var(--mono)}
.history-clear{background:none;border:none;color:var(--danger);font-size:11px;cursor:pointer;font-family:var(--sans);opacity:.7}
.history-list{max-height:220px;overflow-y:auto}
.history-item{padding:10px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;font-size:12px}
.history-item:last-child{border-bottom:none}
.history-item-left{color:var(--muted);line-height:1.5}
.history-item-dose{font-family:var(--mono);font-size:16px;font-weight:500;color:var(--accent)}
.history-empty{padding:20px;text-align:center;font-size:12px;color:var(--muted)}
.history-footer{padding:7px 16px;border-top:1px solid var(--border);font-size:10px;color:var(--muted);text-align:center;font-family:var(--mono);opacity:.5}

/* ── Ad ── */
.ad-slot{width:100%;overflow:hidden}
.ad-slot:empty{display:none!important}

/* ── Lang select ── */
.lang-select{background:var(--surface2);border:1px solid var(--border);border-radius:8px;color:var(--text);font-family:var(--mono);font-size:11px;font-weight:500;padding:5px 22px 5px 8px;outline:none;cursor:pointer;-webkit-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%237d8ea8'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 7px center;transition:border-color .15s}
.lang-select:focus{border-color:var(--accent)}

/* ── Theme toggle ── */
#theme-toggle{position:fixed;bottom:24px;right:20px;z-index:200;width:46px;height:46px;border-radius:50%;background:var(--surface);border:1px solid var(--border);box-shadow:0 4px 16px rgba(0,0,0,.25);cursor:pointer;font-size:20px;display:flex;align-items:center;justify-content:center;transition:background .2s,border-color .2s,transform .15s}
#theme-toggle:active{transform:scale(.9)}

/* ── Cookie ── */
#cookie-banner{position:fixed;bottom:0;left:0;right:0;z-index:999;background:var(--surface2);border-top:1px solid var(--border);padding:14px 16px calc(14px + env(safe-area-inset-bottom));display:none;animation:slideUp .3s ease}
#cookie-banner.show{display:block}
.cookie-inner{max-width:var(--max);margin:0 auto;display:flex;flex-direction:column;gap:10px}
.cookie-text{font-size:12px;color:var(--muted);line-height:1.5}
.cookie-text a{color:var(--accent);text-decoration:none}
.cookie-btns{display:flex;gap:8px}
.cookie-accept{flex:1;background:var(--accent);color:#000;border:none;border-radius:8px;padding:10px;font-family:var(--sans);font-size:13px;font-weight:600;cursor:pointer}
.cookie-decline{flex:1;background:none;color:var(--muted);border:1px solid var(--border);border-radius:8px;padding:10px;font-family:var(--sans);font-size:13px;cursor:pointer}

/* ── Footer ── */
.footer{border-top:1px solid var(--border);padding:16px;text-align:center}
.footer-inner{max-width:var(--max);margin:0 auto;display:flex;flex-wrap:wrap;gap:8px;justify-content:center;align-items:center}
.footer-link{font-size:11px;color:var(--muted);text-decoration:none}
.footer-link:hover{color:var(--accent)}
.footer-sep{color:var(--border);font-size:11px}
.footer-copy{font-size:11px;color:var(--muted);opacity:.5;width:100%}

/* ── Animations ── */
@keyframes slideIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideUp{from{transform:translateY(100%)}to{transform:translateY(0)}}

/* ── FAQ ── */
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:last-child{border-bottom:none}
.faq-q{width:100%;background:none;border:none;padding:14px 0;display:flex;justify-content:space-between;align-items:flex-start;gap:12px;cursor:pointer;text-align:left;color:var(--text);font-family:var(--sans);font-size:14px;font-weight:600;line-height:1.4}
.faq-q:hover{color:var(--accent)}
.faq-icon{font-size:18px;flex-shrink:0;transition:transform .2s;margin-top:1px;color:var(--muted)}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--accent)}
.faq-a{font-size:13px;color:var(--muted);line-height:1.7;max-height:0;overflow:hidden;transition:max-height .3s ease,padding .2s}
.faq-item.open .faq-a{max-height:600px;padding-bottom:14px}
.faq-a ul{padding-left:16px;margin-top:6px}
.faq-a li{margin-bottom:4px}
.faq-a strong{color:var(--text)}
.warn-card{background:rgba(224,92,92,.08);border:1px solid rgba(224,92,92,.25);border-radius:12px;padding:14px 16px}
.warn-card h2{color:var(--danger)!important}

/* ── Profiles ─────────────────────────────────────────────── */
.profile-bar {
  display: flex; gap: 6px; align-items: center;
}
.profile-bar-label {
  font-size: 10px; color: var(--muted); font-family: var(--mono);
  text-transform: uppercase; letter-spacing: .08em; flex-shrink: 0;
}
.profile-tabs { display: flex; gap: 4px; flex: 1; }
.profile-tab {
  flex: 1; background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; color: var(--muted); font-family: var(--sans);
  font-size: 12px; font-weight: 500; padding: 7px 4px;
  cursor: pointer; transition: all .15s; text-align: center; white-space: nowrap;
}
.profile-tab.active {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
[data-theme="light"] .profile-tab.active { color: #000; }
.profile-tab:active { opacity: .8; }
.profile-edit-btn {
  width: 32px; height: 32px; flex-shrink: 0;
  background: var(--surface2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--muted); font-size: 14px; cursor: pointer; transition: all .15s;
  display: flex; align-items: center; justify-content: center;
}
.profile-edit-btn:active { border-color: var(--accent); color: var(--accent); }

/* ── Presets ──────────────────────────────────────────────── */
.preset-row {
  display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; align-items: center;
  width: 100%;
}
.preset-label {
  font-size: 10px; color: var(--muted); font-family: var(--mono);
  text-transform: uppercase; letter-spacing: .08em; width: 100%; margin-bottom: 2px;
}
.preset-chip {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 20px;
  color: var(--text); font-family: var(--sans); font-size: 12px; font-weight: 500;
  padding: 5px 12px; cursor: pointer; transition: all .15s; white-space: nowrap;
  display: flex; align-items: center; gap: 4px;
}
.preset-chip:active { opacity: 0.7; transform: scale(0.97); }
.preset-chip-val { font-family: var(--mono); font-size: 11px; color: var(--muted); flex-shrink: 0; }
.preset-add-btn {
  background: none; border: 1px dashed var(--border); border-radius: 20px;
  color: var(--muted); font-family: var(--sans); font-size: 12px;
  padding: 5px 10px; cursor: pointer; transition: all .15s; white-space: nowrap;
}
.preset-add-btn:active { border-color: var(--accent); color: var(--accent); }

/* ── Modal ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 500;
  background: rgba(0,0,0,.6); backdrop-filter: blur(4px);
  display: flex; align-items: flex-end; justify-content: center;
  padding: 0; animation: fadeIn .2s ease;
}
.modal-overlay.hidden { display: none; }
.modal-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 20px 20px 0 0; width: 100%; max-width: 480px;
  padding: 20px 20px calc(20px + env(safe-area-inset-bottom));
  animation: slideUp .25s ease;
}
.modal-title {
  font-size: 15px; font-weight: 600; margin-bottom: 16px;
  display: flex; justify-content: space-between; align-items: center;
}
.modal-close {
  background: none; border: none; color: var(--muted);
  font-size: 20px; cursor: pointer; padding: 0 4px;
}
.modal-field { margin-bottom: 12px; }
.modal-field label { display: block; font-size: 11px; color: var(--muted); margin-bottom: 5px; font-family: var(--mono); }
.modal-field input {
  width: 100%; background: var(--surface2); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-family: var(--mono);
  font-size: 16px; padding: 10px 14px; outline: none;
  transition: border-color .15s; -webkit-appearance: none;
}
.modal-field input:focus { border-color: var(--accent); }
.modal-btns { display: flex; gap: 8px; margin-top: 16px; }
.modal-save {
  flex: 1; background: var(--accent); color: #000; border: none;
  border-radius: 10px; padding: 13px; font-family: var(--sans);
  font-size: 14px; font-weight: 600; cursor: pointer;
}
.modal-cancel {
  flex: 1; background: none; color: var(--muted); border: 1px solid var(--border);
  border-radius: 10px; padding: 13px; font-family: var(--sans);
  font-size: 14px; cursor: pointer;
}
.modal-delete {
  background: none; color: var(--danger); border: 1px solid rgba(224,92,92,.3);
  border-radius: 10px; padding: 13px 16px; font-family: var(--sans);
  font-size: 14px; cursor: pointer;
}
.profile-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.profile-field { display: flex; flex-direction: column; gap: 4px; }
.profile-field label { font-size: 10px; color: var(--muted); font-family: var(--mono); }
.profile-field input {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 7px;
  color: var(--text); font-family: var(--mono); font-size: 15px; font-weight: 500;
  padding: 8px; text-align: center; outline: none; -webkit-appearance: none;
  transition: border-color .15s;
}
.profile-field input:focus { border-color: var(--accent); }
.profile-reset-btn {
  background: none; border: none; color: var(--muted); font-family: var(--sans);
  font-size: 12px; cursor: pointer; padding: 4px 0; text-decoration: underline;
  text-underline-offset: 3px;
}
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }

/* ── Preset active state ──────────────────────────────────── */
.preset-chip-active {
  background: var(--accent) !important;
  color: #fff !important;
  border-color: var(--accent) !important;
}
[data-theme="light"] .preset-chip-active { color: #000 !important; }
.preset-chip-active .preset-chip-val { color: rgba(255,255,255,0.75) !important; }
[data-theme="light"] .preset-chip-active .preset-chip-val { color: rgba(0,0,0,0.6) !important; }

/* ── Reset button — destructive red style ─────────────────── */
.reset-btn {
  background: none;
  border: 1px solid rgba(224,92,92,0.4);
  color: var(--danger);
  font-family: var(--sans);
  font-size: 13px;
  border-radius: 10px;
  padding: 11px;
  width: 100%;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.reset-btn:hover { background: rgba(224,92,92,0.07); border-color: var(--danger); }
.reset-btn:active { background: rgba(224,92,92,0.15); }

/* ── Layout helpers (replaces inline styles) ─────────────────── */
.calc-header{display:flex;align-items:center;justify-content:space-between;padding:4px 0;gap:12px}
.calc-title{font-size:24px;font-weight:600;letter-spacing:-.5px;line-height:1.2}
.preset-chips-wrap{display:flex;gap:6px;flex-wrap:wrap}
.input-row--last{margin-bottom:0}
.breakdown-val-accent{color:var(--accent);font-weight:600}