:root{
  --ink-950:#060B14;
  --ink-900:#0B1424;
  --ink-800:#101C30;
  --panel:#122036;
  --panel-2:#0E1A2C;
  --line:#22314D;
  --line-soft:#182742;
  --cyan:#2FE0C8;
  --cyan-dim:#1B7A6D;
  --amber:#F4B740;
  --red:#FF6161;
  --text:#E7ECF3;
  --text-dim:#8CA0BE;
  --text-faint:#526480;
  --mono:'IBM Plex Mono', monospace;
  --sans:'IBM Plex Sans', sans-serif;
  --radius:8px;
}

[data-theme="light"]{
  --ink-950:#F0F4F8;
  --ink-900:#FFFFFF;
  --ink-800:#E8EEF5;
  --panel:#FFFFFF;
  --panel-2:#F0F4F8;
  --line:#C8D6E5;
  --line-soft:#D8E4EF;
  --cyan:#0A8F7E;
  --cyan-dim:#0A8F7E;
  --amber:#B8860B;
  --red:#D93025;
  --text:#0D1B2A;
  --text-dim:#3D5166;
  --text-faint:#7A94AD;
}

*{box-sizing:border-box; margin:0; padding:0;}
html,body{height:100%;}
body{
  background:
    radial-gradient(circle at 15% 0%, rgba(47,224,200,0.06), transparent 40%),
    repeating-linear-gradient(180deg, rgba(255,255,255,0.012) 0px, rgba(255,255,255,0.012) 1px, transparent 1px, transparent 3px),
    var(--ink-950);
  color:var(--text);
  font-family:var(--sans);
  font-size:14px;
  min-height:100vh;
  transition:background .25s, color .25s;
}
[data-theme="light"] body{
  background:var(--ink-950);
}
.hidden{display:none !important;}
button{font-family:inherit; cursor:pointer; border:none; background:none; color:inherit;}
input,select,textarea{
  width:100%;
  background:var(--panel-2);
  border:1px solid var(--line);
  border-radius:6px;
  color:var(--text);
  padding:10px 12px;
  font-family:var(--sans);
  font-size:13.5px;
  margin-bottom:14px;
  outline:none;
  transition:border-color .15s;
}
input:focus,select:focus,textarea:focus{border-color:var(--cyan);}
label{
  display:block;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--text-dim);
  margin-bottom:6px;
}

/* ===== buttons ===== */
.btn-primary{
  background:var(--cyan);
  color:#fff;
  font-weight:600;
  padding:10px 16px;
  border-radius:6px;
  font-size:13.5px;
  transition:filter .15s, transform .1s;
}
[data-theme="dark"] .btn-primary, :root:not([data-theme]) .btn-primary{color:#03211D;}
.btn-primary:hover{filter:brightness(1.08);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  padding:10px 14px;
  border-radius:6px;
  border:1px solid var(--line);
  color:var(--text-dim);
  font-size:13.5px;
}
.btn-ghost:hover{border-color:var(--cyan-dim); color:var(--text);}
.btn-danger{
  padding:10px 14px;
  border-radius:6px;
  border:1px solid rgba(255,97,97,0.35);
  color:var(--red);
  font-size:13.5px;
}
.btn-danger:hover{background:rgba(255,97,97,0.08);}
.icon-btn{
  width:32px; height:32px;
  display:flex; align-items:center; justify-content:center;
  border-radius:6px;
  color:var(--text-dim);
  font-size:15px;
}
.icon-btn:hover{background:var(--panel); color:var(--text);}

/* ===== instrument cluster (signature element) ===== */
.cluster{
  display:flex;
  align-items:center;
  gap:28px;
  padding:14px 24px;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg, var(--ink-900), var(--ink-950));
}
.cluster-brand{display:flex; align-items:baseline; gap:8px; min-width:210px;}
.brand-mark{color:var(--cyan); font-size:16px;}
.brand-name{font-family:var(--mono); font-weight:700; letter-spacing:.08em; font-size:15px;}
.brand-sub{font-family:var(--mono); font-size:10px; color:var(--text-faint); letter-spacing:.1em;}
.cluster-gauges{display:flex; gap:10px; flex:1;}
.gauge{
  background:var(--panel-2);
  border:1px solid var(--line-soft);
  border-radius:6px;
  padding:8px 18px;
  min-width:92px;
  text-align:center;
  position:relative;
}
.gauge::before{
  content:'';
  position:absolute; top:0; left:10%; right:10%; height:2px;
  background:var(--text-faint);
  opacity:.3;
}
.gauge[data-tone="cyan"]::before{background:var(--cyan); opacity:.7;}
.gauge[data-tone="red"]::before{background:var(--red); opacity:.7;}
.gauge[data-tone="amber"]::before{background:var(--amber); opacity:.7;}
.gauge-value{font-family:var(--mono); font-size:22px; font-weight:600; line-height:1.1;}
.gauge[data-tone="cyan"] .gauge-value{color:var(--cyan);}
.gauge[data-tone="red"] .gauge-value{color:var(--red);}
.gauge[data-tone="amber"] .gauge-value{color:var(--amber);}
.gauge-label{font-family:var(--mono); font-size:9.5px; color:var(--text-faint); letter-spacing:.08em; margin-top:2px;}

/* ===== layout ===== */
.layout{display:flex; min-height:calc(100vh - 65px);}
.side-nav{
  width:190px;
  border-right:1px solid var(--line);
  padding:20px 12px;
  display:flex;
  flex-direction:column;
  gap:2px;
  background:var(--ink-900);
}
.nav-item{
  display:flex; align-items:center; gap:10px;
  padding:10px 12px;
  border-radius:6px;
  color:var(--text-dim);
  font-size:13.5px;
  text-align:left;
}
.nav-tick{font-family:var(--mono); font-size:10px; color:var(--text-faint);}
.nav-item:hover{background:var(--panel);}
.nav-item.active{background:var(--panel); color:var(--cyan);}
.nav-item.active .nav-tick{color:var(--cyan);}
.nav-spacer{flex:1;}
.nav-cta{width:100%; text-align:center;}

.main{flex:1; padding:28px 32px; overflow-y:auto;}
.view-head{display:flex; align-items:baseline; justify-content:space-between; margin-bottom:18px;}
.view-head h2{font-family:var(--mono); font-size:19px; font-weight:600;}
.view-date{font-family:var(--mono); font-size:12px; color:var(--text-faint);}

/* ===== task list ===== */
.task-list{display:flex; flex-direction:column; gap:8px;}
.task-card{
  display:flex; align-items:center; gap:14px;
  background:var(--panel);
  border:1px solid var(--line-soft);
  border-left:3px solid var(--text-faint);
  border-radius:6px;
  padding:13px 16px;
  transition:border-color .15s, transform .1s;
  cursor:pointer;
}
.task-card:hover{border-color:var(--cyan-dim); transform:translateX(2px);}
.task-card[data-priority="high"]{border-left-color:var(--red);}
.task-card[data-priority="normal"]{border-left-color:var(--cyan);}
.task-card[data-priority="low"]{border-left-color:var(--text-faint);}
.task-card.done{opacity:.45;}
.task-check{
  width:20px; height:20px;
  border-radius:50%;
  border:1.5px solid var(--line);
  flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  font-size:11px;
}
.task-card.done .task-check{background:var(--cyan); border-color:var(--cyan); color:#03211D;}
.task-body{flex:1; min-width:0;}
.task-title{font-size:14px; font-weight:500;}
.task-card.done .task-title{text-decoration:line-through; color:var(--text-dim);}
.task-meta{font-family:var(--mono); font-size:11px; color:var(--text-faint); margin-top:3px;}
.task-tag{
  font-family:var(--mono); font-size:10px; letter-spacing:.05em;
  padding:3px 8px; border-radius:4px; text-transform:uppercase;
  flex-shrink:0;
}
.task-tag.overdue{background:rgba(255,97,97,0.12); color:var(--red);}
.task-tag.today{background:rgba(47,224,200,0.12); color:var(--cyan);}
.task-tag.soon{background:rgba(244,183,64,0.12); color:var(--amber);}

.empty-state{text-align:center; padding:60px 20px; color:var(--text-faint);}
.empty-mark{font-family:var(--mono); font-size:24px; margin-bottom:8px;}

/* ===== calendar ===== */
.cal-nav{display:flex; align-items:center; gap:6px;}
.cal-grid{
  display:grid;
  grid-template-columns:repeat(7, 1fr);
  gap:6px;
}
.cal-dow{
  font-family:var(--mono); font-size:10px; color:var(--text-faint);
  text-align:center; padding-bottom:6px; letter-spacing:.06em;
}
.cal-cell{
  background:var(--panel);
  border:1px solid var(--line-soft);
  border-radius:6px;
  min-height:88px;
  padding:8px;
  display:flex; flex-direction:column; gap:4px;
  cursor:pointer;
}
.cal-cell:hover{border-color:var(--cyan-dim);}
.cal-cell.outside{opacity:.35;}
.cal-cell.is-today{border-color:var(--cyan);}
.cal-daynum{font-family:var(--mono); font-size:11px; color:var(--text-dim);}
.cal-cell.is-today .cal-daynum{color:var(--cyan); font-weight:600;}
.cal-task-pill{
  font-size:10.5px;
  padding:2px 6px;
  border-radius:4px;
  background:var(--panel-2);
  border-left:2px solid var(--cyan);
  color:var(--text);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  cursor:pointer;
}
.cal-task-pill[data-priority="high"]{border-left-color:var(--red);}
.cal-task-pill[data-priority="low"]{border-left-color:var(--text-faint);}

/* ===== modal ===== */
.modal-overlay{
  position:fixed; inset:0; background:rgba(3,7,14,0.7);
  display:flex; align-items:center; justify-content:center;
  z-index:50; padding:20px;
}
.modal{
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--radius);
  width:100%; max-width:420px;
  padding:22px;
  box-shadow:0 20px 60px rgba(0,0,0,0.5);
}
.modal-head{
  display:flex; justify-content:space-between; align-items:center;
  font-family:var(--mono); font-size:13px; letter-spacing:.05em; text-transform:uppercase; color:var(--text-dim);
  margin-bottom:16px;
}
.modal-row{display:grid; grid-template-columns:1fr 1fr; gap:12px;}
.modal-actions{display:flex; justify-content:space-between; align-items:center; margin-top:8px;}
.modal-actions-right{display:flex; gap:8px; margin-left:auto;}

/* ===== setup screen ===== */
.setup-screen{
  min-height:100vh; display:flex; align-items:center; justify-content:center; padding:20px;
}
.setup-card{
  max-width:440px; width:100%;
  background:var(--ink-900); border:1px solid var(--line); border-radius:10px;
  padding:32px;
}
.setup-badge{font-family:var(--mono); font-size:11px; color:var(--cyan); letter-spacing:.1em; margin-bottom:10px;}
.setup-card h1{font-size:22px; margin-bottom:10px; font-weight:600;}
.setup-sub{color:var(--text-dim); font-size:13px; line-height:1.5; margin-bottom:20px;}
.setup-hint{color:var(--text-faint); font-size:11.5px; margin-top:4px; line-height:1.5;}

/* ===== day panel ===== */
.day-panel-backdrop{
  position:fixed; inset:0; background:rgba(3,7,14,0.5); z-index:40;
}
.day-panel{
  position:fixed; top:0; right:0; bottom:0; width:340px;
  background:var(--ink-900);
  border-left:1px solid var(--line);
  padding:22px;
  z-index:45;
  overflow-y:auto;
  display:flex; flex-direction:column;
  box-shadow:-12px 0 40px rgba(0,0,0,0.4);
}
.day-panel-head{
  display:flex; justify-content:space-between; align-items:center;
  margin-bottom:18px;
}
.day-panel-title{
  font-family:var(--mono); font-size:13px; letter-spacing:.06em;
  text-transform:uppercase; color:var(--cyan);
}

/* ===== toast ===== */
.toast{
  position:fixed; bottom:24px; left:50%; transform:translateX(-50%);
  background:var(--panel); border:1px solid var(--cyan-dim); color:var(--text);
  font-family:var(--mono); font-size:12.5px;
  padding:10px 18px; border-radius:6px; z-index:100;
}

@media (max-width:760px){
  /* header */
  .cluster{
    flex-wrap:nowrap;
    gap:10px;
    padding:10px 14px;
    position:sticky; top:0; z-index:30;
  }
  .brand-sub{display:none;}
  .cluster-brand{min-width:0; gap:6px;}
  .brand-name{font-size:13px;}
  .cluster-gauges{
    flex:1;
    gap:6px;
    overflow-x:auto;
    scrollbar-width:none;
  }
  .cluster-gauges::-webkit-scrollbar{display:none;}
  .gauge{padding:6px 10px; min-width:68px;}
  .gauge-value{font-size:17px;}
  .gauge-label{font-size:8.5px;}

  /* layout: main fills screen, nav moves to bottom */
  .layout{flex-direction:column; min-height:0;}
  .side-nav{
    display:none; /* hidden; replaced by bottom-nav */
  }
  .main{
    padding:16px 14px 80px; /* bottom pad for FAB */
    flex:1;
  }

  /* bottom tab bar */
  .bottom-nav{
    display:flex;
    position:fixed; bottom:0; left:0; right:0;
    background:var(--ink-900);
    border-top:1px solid var(--line);
    z-index:30;
    height:58px;
  }
  .bottom-nav-item{
    flex:1;
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    gap:3px;
    color:var(--text-faint);
    font-family:var(--mono);
    font-size:9px;
    letter-spacing:.04em;
    text-transform:uppercase;
    border:none; background:none; cursor:pointer;
    padding:6px 0;
  }
  .bottom-nav-item .bnav-icon{font-size:17px; line-height:1;}
  .bottom-nav-item.active{color:var(--cyan);}

  /* FAB */
  .fab{
    display:flex;
    position:fixed; bottom:68px; right:18px;
    width:48px; height:48px;
    background:var(--cyan);
    color:#03211D;
    border-radius:50%;
    align-items:center; justify-content:center;
    font-size:24px; font-weight:600;
    box-shadow:0 4px 18px rgba(47,224,200,0.35);
    z-index:31;
    border:none; cursor:pointer;
  }

  /* calendar: compact dot-style cells */
  .cal-grid{gap:3px;}
  .cal-cell{
    min-height:44px;
    padding:5px 4px;
    gap:3px;
  }
  .cal-task-pill{display:none;} /* hide text pills */
  .cal-cell.has-tasks .cal-daynum::after{
    content:'';
    display:block;
    width:5px; height:5px;
    border-radius:50%;
    background:var(--cyan);
    margin:3px auto 0;
  }
  .cal-dow{font-size:9px; padding-bottom:4px;}

  /* day panel: full-width bottom sheet */
  .day-panel{
    width:100%;
    top:auto;
    border-left:none;
    border-top:1px solid var(--line);
    border-radius:14px 14px 0 0;
    max-height:75vh;
    padding:18px 16px 24px;
    box-shadow:0 -8px 40px rgba(0,0,0,0.5);
  }

  /* modal: bottom sheet */
  .modal-overlay{align-items:flex-end; padding:0;}
  .modal{
    border-radius:14px 14px 0 0;
    max-width:100%;
    max-height:90vh;
    overflow-y:auto;
    padding:20px 18px 32px;
  }
  .modal-row{grid-template-columns:1fr 1fr;}

  /* toast above bottom nav */
  .toast{bottom:68px;}

  /* view head */
  .view-head{margin-bottom:14px;}
  .view-head h2{font-size:16px;}
}

/* desktop: hide bottom-nav and FAB */
@media (min-width:761px){
  .bottom-nav{display:none;}
  .fab{display:none;}
}