/* ============ 벌집실험실(Honey Science Lab) 센서 연구소 (허브 sensor.html + 실행기 sensor/lab.html) ============
 * base.css 토큰(--honey, --navy, --cream ...)과 Pretendard 를 그대로 쓴다.
 */

/* ───────── 공통 ───────── */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 20px; box-shadow: var(--shadow); min-width: 0; }
.card + .card { margin-top: 16px; }
.h2 { font-size: 1.15rem; color: var(--navy); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.muted { color: var(--ink-soft); font-size: .92rem; }
.btn.big { padding: 13px 22px; font-size: 1.05rem; border-radius: 14px; }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: .45; cursor: not-allowed; box-shadow: none; }
.btn.primary:disabled:hover { background: var(--honey); color: var(--navy); }
.sp { flex: 1; }
.msg { margin-top: 10px; font-weight: 650; color: var(--ink-soft); font-size: .93rem; min-height: 1.2em; }
.msg.good { color: #137A4B; }
.msg.bad { color: #B12A52; }
.msg a { color: var(--honey-deep); text-decoration: underline; }
.msg .after { display: block; margin-top: 8px; padding: 10px 12px; background: var(--cream); border: 1px solid #F3DFAE; border-radius: 12px; color: var(--ink); font-weight: 600; }
code { background: #F4EEDF; padding: 1px 6px; border-radius: 6px; font-size: .88em; }
.dev-ic { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 14px; background: var(--cream); border: 1px solid #F3DFAE; font-size: 1.45rem; flex-shrink: 0; line-height: 1; }
.dev-ic.big { width: 64px; height: 64px; font-size: 2rem; border-radius: 18px; }

.demo-bar { background: repeating-linear-gradient(-45deg, #FFE7A6, #FFE7A6 12px, #FFF1CC 12px, #FFF1CC 24px); border-bottom: 1px solid #F3D27E; font-size: .9rem; color: var(--navy); }
.demo-bar .wrap { padding-top: 8px; padding-bottom: 8px; }

.toast { position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 30px); opacity: 0; pointer-events: none; z-index: 90;
  background: var(--navy); color: #fff; padding: 12px 18px; border-radius: 14px; font-weight: 650; box-shadow: var(--shadow-lg); transition: .25s; max-width: calc(100vw - 32px); text-align: center; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.conn-pill { display: inline-flex; align-items: center; gap: 7px; font-size: .82rem; font-weight: 750; color: var(--ink-soft); background: #fff; border: 1px solid var(--line); padding: 4px 11px; border-radius: 99px; max-width: 60vw; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conn-pill i { width: 9px; height: 9px; border-radius: 50%; background: #C5CAD3; flex-shrink: 0; }
.conn-pill.on { color: #137A4B; border-color: #A9DEC2; background: #EFFAF4; }
.conn-pill.on i { background: var(--green); box-shadow: 0 0 0 3px rgba(34, 160, 107, .2); animation: blink 1.6s infinite; }
.conn-pill.off { color: #B12A52; border-color: #F2B9CA; }
.conn-pill.off i { background: var(--red); }
@keyframes blink { 50% { box-shadow: 0 0 0 6px rgba(34, 160, 107, .05); } }

/* ───────── 실행기 머리 ───────── */
.ks-lab main { padding-top: 14px; }
.lab-crumb { display: flex; align-items: center; gap: 8px; font-size: .86rem; color: var(--ink-soft); font-weight: 650; flex-wrap: wrap; }
.lab-crumb a:hover { color: var(--honey-deep); }
.lab-title { display: flex; align-items: center; gap: 14px; margin: 14px 0 12px; }
.lab-title h1 { font-size: clamp(1.4rem, 3.4vw, 2rem); color: var(--navy); }
.ex-term { font-size: .84rem; font-weight: 800; color: var(--honey-deep); }
.ex-ic { width: 64px; height: 64px; border-radius: 18px; background: var(--cream); border: 1px solid #F3DFAE; display: grid; place-items: center; flex-shrink: 0; overflow: hidden; }
.ex-ic img { width: 100%; height: 100%; object-fit: contain; padding: 4px; }
.ex-ic .emo { font-size: 2rem; }
.ex-ic .dev-ic { border: 0; background: none; font-size: 2rem; }

.stepper { display: flex; gap: 6px; overflow-x: auto; padding: 4px 2px 10px; scrollbar-width: thin; margin-bottom: 6px; }
.stepper button { display: flex; align-items: center; gap: 6px; border: 1px solid var(--line); background: #fff; border-radius: 99px; padding: 5px 12px 5px 5px; font-weight: 750; font-size: .84rem; color: var(--ink-soft); white-space: nowrap; flex-shrink: 0; }
.stepper button i { font-style: normal; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; background: var(--cream); font-size: .78rem; color: var(--navy); }
.stepper button.done { border-color: #A9DEC2; color: #137A4B; }
.stepper button.done i { background: var(--green); color: #fff; }
.stepper button.now { background: var(--navy); border-color: var(--navy); color: #fff; box-shadow: 0 3px 0 var(--honey); }
.stepper button.now i { background: var(--honey); }
.stepper button:disabled { opacity: .5; cursor: default; }

#screen.enter { animation: rise .28s ease-out; }
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }

.step-nav { display: flex; align-items: center; gap: 10px; margin-top: 18px; flex-wrap: wrap; }

/* 말풍선 */
.bubble { display: flex; gap: 12px; align-items: flex-start; margin-top: 12px; }
.bubble img { width: 74px; height: 74px; object-fit: contain; flex-shrink: 0; border-radius: 50%; background: var(--cream); border: 2px solid #F6D38A; }
.bubble p { position: relative; background: var(--cream); border: 1px solid #F3DFAE; border-radius: 4px 18px 18px 18px; padding: 14px 16px; font-size: 1.04rem; line-height: 1.75; color: var(--ink); flex: 1; min-width: 0; }

/* 소개 */
.intro-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 16px; align-items: start; }
.intro-grid .side { display: grid; gap: 12px; }
.intro-grid .side .card { margin: 0; }
.q-card { background: var(--navy); color: #fff; border-radius: 16px; padding: 16px 18px; box-shadow: 0 4px 0 var(--honey); }
.q-card span { font-size: .8rem; font-weight: 800; color: #FFD873; }
.q-card p { font-size: clamp(1.1rem, 2.6vw, 1.35rem); font-weight: 800; line-height: 1.5; margin-top: 4px; }
.card.mini { padding: 16px; }
.card.mini h3 { font-size: .85rem; color: var(--ink-soft); margin-bottom: 8px; }
.dev-line { display: flex; gap: 12px; align-items: center; }
.dev-line b { display: block; color: var(--navy); }
.dev-line span { font-size: .84rem; color: var(--ink-soft); font-weight: 600; }
.qinfo { margin-top: 10px; font-size: .88rem; color: #4A5368; }
.sim-link { transition: .18s; display: block; }
.sim-link:hover { border-color: var(--honey); transform: translateY(-2px); }
.teacher summary, .teacher-set summary, .guide-d summary { cursor: pointer; font-weight: 800; color: var(--navy); }
.teacher ul { margin: 10px 0 0 18px; padding: 0; font-size: .86rem; color: #4A5368; }
.teacher p { margin-top: 8px; font-size: .86rem; color: #4A5368; }

/* 준비물·연결 */
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.two > .card { margin: 0; }
.checks { list-style: none; margin: 10px 0 0; padding: 0; display: grid; gap: 8px; }
.checks label { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; font-weight: 650; }
.checks input { width: 20px; height: 20px; accent-color: var(--green); flex-shrink: 0; }
.checks label:has(input:checked) { background: #EFFAF4; border-color: #A9DEC2; }
.checks label:has(input:checked) span { color: #137A4B; }
.safety { background: #FFF6F8; border-color: #F6CBD7; }
.safety ul { margin: 8px 0 0 18px; padding: 0; display: grid; gap: 6px; }
.howto { margin: 6px 0 0; padding: 0; list-style: none; counter-reset: s; display: grid; gap: 10px; }
.howto li { counter-increment: s; position: relative; padding-left: 40px; line-height: 1.65; }
.howto li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--honey); color: var(--navy); font-weight: 850; display: grid; place-items: center; font-size: .9rem; }
.prog { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.notes { margin: 14px 0 0; padding: 12px 14px 12px 32px; background: #F6F2E8; border-radius: 12px; font-size: .88rem; color: #4A5368; display: grid; gap: 4px; }
.connect-card { text-align: center; }
.conn-big { width: 96px; height: 96px; margin: 6px auto 10px; border-radius: 50%; display: grid; place-items: center; font-size: 2.6rem; background: var(--cream); border: 2px dashed #F3D27E; }
.conn-big.on { background: #EFFAF4; border: 2px solid #A9DEC2; }
.connect-card .btn.big { margin-top: 12px; min-width: 200px; }
.connect-card.compact { text-align: left; }
.connect-card.compact .btn.big { margin-top: 0; width: 100%; }
.teacher-set { margin-top: 14px; text-align: left; background: #F6F2E8; border-radius: 12px; padding: 10px 12px; font-size: .88rem; }
.teacher-set p { margin: 8px 0; color: #4A5368; }
.seg-mini { display: flex; gap: 14px; flex-wrap: wrap; font-weight: 700; }
.seg-mini input { accent-color: var(--navy); }

/* 미션 */
.mission-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 16px; align-items: start; }
.mission-grid > .card { margin: 0; }
.m-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.m-no { font-size: .8rem; font-weight: 850; background: var(--honey); color: var(--navy); border-radius: 99px; padding: 3px 10px; }
.mission h2 { font-size: 1.3rem; color: var(--navy); margin-top: 8px; }
.timer { display: flex; align-items: baseline; justify-content: center; gap: 8px; margin-top: 14px; padding: 14px; border-radius: 16px; background: var(--navy); color: #fff; }
.timer b { font-size: 3.4rem; font-variant-numeric: tabular-nums; line-height: 1; }
.timer .t-emo { font-size: 2rem; }
.srec { display: flex; align-items: center; gap: 10px; margin-top: 14px; font-weight: 750; font-size: .9rem; color: var(--navy); font-variant-numeric: tabular-nums; }
.sbar { flex: 1; height: 12px; background: #F1EADA; border-radius: 99px; overflow: hidden; }
.sbar div { height: 100%; width: 0; background: linear-gradient(90deg, var(--honey), var(--honey-deep)); transition: width .2s; }
.rec-h { font-size: .85rem; color: var(--ink-soft); margin: 16px 0 6px; }
.rec { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.rec li { display: flex; justify-content: space-between; gap: 10px; padding: 6px 10px; border-radius: 10px; font-size: .9rem; color: var(--ink-soft); }
.rec li b { color: #A3A9B6; font-variant-numeric: tabular-nums; white-space: nowrap; }
.rec li.ok b { color: var(--navy); }
.rec li.now { background: var(--cream); color: var(--navy); font-weight: 750; }

/* 실시간 패널 */
.live { position: relative; }
.lv-top { display: flex; flex-direction: column; gap: 2px; }
.lv-top b { color: var(--navy); font-size: 1rem; }
.lv-info { font-size: .82rem; color: var(--ink-soft); }
.lv-row { display: flex; align-items: center; gap: 16px; margin-top: 6px; }
.lv-big { display: flex; align-items: baseline; gap: 6px; padding: 4px 0; min-width: 0; }
.lv-big b { font-size: clamp(3rem, 11vw, 5rem); font-weight: 850; color: var(--navy); font-variant-numeric: tabular-nums; letter-spacing: -0.03em; line-height: 1.05; }
.lv-big .u { font-size: 1.3rem; font-weight: 800; color: var(--ink-soft); }
.lv-ext { min-height: 1.4em; font-weight: 700; color: var(--red); font-size: .95rem; }
.gauge { height: 14px; background: #F1EADA; border-radius: 99px; overflow: hidden; margin: 6px 0 4px; }
.gauge div { height: 100%; width: 0; background: linear-gradient(90deg, #FFD873, var(--honey-deep)); border-radius: 99px; transition: width .25s; }
.bulb { position: relative; width: 84px; height: 84px; display: grid; place-items: center; flex-shrink: 0; }
.bulb .halo { position: absolute; inset: -14px; border-radius: 50%; background: radial-gradient(circle, rgba(255, 216, 115, .95) 0%, rgba(245, 165, 36, .45) 40%, transparent 70%); opacity: 0; transition: opacity .3s; }
.bulb span { position: relative; font-size: 3.4rem; filter: grayscale(1) brightness(.7); transition: filter .3s; }
.leds { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; padding: 9px; background: #1B2333; border-radius: 12px; width: 92px; flex-shrink: 0; }
.leds i { aspect-ratio: 1; border-radius: 3px; background: #3A4458; transition: .2s; }
.leds i.on { background: #FF4A3D; box-shadow: 0 0 8px #FF4A3D; }
.lv-chart .chart-box, .chart-box { position: relative; height: 190px; margin-top: 8px; }
.chart-box canvas { width: 100%; height: 100%; display: block; }
.cap-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.cap-row .btn.big { flex: 1; min-width: 160px; }

/* 결과 */
.result-hero { display: flex; align-items: center; gap: 16px; background: linear-gradient(120deg, #FFF1CC, #FFFCF5); border: 1px solid #F3DFAE; border-radius: 22px; padding: 16px 20px; margin-bottom: 16px; }
.result-hero img { width: 84px; height: 84px; object-fit: contain; flex-shrink: 0; }
.result-hero h2 { font-size: 1.5rem; color: var(--navy); }
.result-hero p { color: var(--ink-soft); }
.bars { display: grid; gap: 12px; margin-top: 4px; }
.bar .bl { display: flex; justify-content: space-between; gap: 10px; font-weight: 700; font-size: .92rem; }
.bar .bl b { color: var(--navy); font-variant-numeric: tabular-nums; white-space: nowrap; }
.bar .bt { height: 18px; background: #F4EEDF; border-radius: 99px; overflow: hidden; margin-top: 4px; }
.bar .bt div { height: 100%; width: 0; border-radius: 99px; transition: width .9s cubic-bezier(.2, .8, .2, 1); }
.bar .bt div.grow { width: var(--w); }
.bar-note { font-size: .8rem; color: var(--ink-soft); margin-top: 2px; }
.g-title { font-size: .92rem; color: var(--ink-soft); margin: 14px 0 6px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; margin-top: 6px; }
.stats div { background: var(--cream); border: 1px solid #F3DFAE; border-radius: 12px; padding: 8px 10px; min-width: 0; }
.stats span { display: block; font-size: .76rem; color: var(--ink-soft); font-weight: 700; }
.stats b { font-size: 1.2rem; color: var(--navy); font-variant-numeric: tabular-nums; }
.stats small { font-size: .75rem; color: var(--ink-soft); }
.concl p { line-height: 1.8; font-size: 1.02rem; }
.think { margin-top: 14px; background: var(--navy); color: #fff; border-radius: 14px; padding: 12px 14px; }
.think b { color: #FFD873; font-size: .85rem; }
.sim-banner { display: flex; align-items: center; gap: 14px; margin-top: 16px; transition: .18s; }
.sim-banner:hover { border-color: var(--honey); transform: translateY(-2px); }
.sim-banner small { font-size: .78rem; font-weight: 800; color: var(--honey-deep); }
.sim-banner b { display: block; color: var(--navy); font-size: 1.08rem; }
.sim-banner p { font-size: .88rem; color: var(--ink-soft); }
.sim-banner .go { margin-left: auto; font-weight: 800; color: var(--navy); white-space: nowrap; }
.save .form { display: grid; grid-template-columns: 1fr 1fr auto; gap: 10px; align-items: end; margin-top: 12px; }
.save label { display: grid; gap: 4px; font-size: .84rem; font-weight: 750; color: var(--ink-soft); }
.save input, .sel select { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; background: #fff; color: var(--ink); min-width: 0; }
.save a { color: var(--honey-deep); text-decoration: underline; }

/* 자유 관찰 */
.qtabs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 8px; margin-bottom: 6px; scrollbar-width: thin; }
.qtabs button { border: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 8px 14px; font-weight: 750; color: var(--ink-soft); white-space: nowrap; flex-shrink: 0; }
.qtabs button.on { background: var(--navy); border-color: var(--navy); color: #fff; box-shadow: 0 3px 0 var(--honey); }
.obs-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 16px; align-items: start; margin-bottom: 16px; }
.obs-grid > .card { margin: 0; }
.obs-ctl { display: grid; gap: 14px; }
.sel { display: grid; gap: 4px; font-size: .84rem; font-weight: 750; color: var(--ink-soft); }
.btn-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.btn-grid .btn { white-space: normal; }
.exp-mini { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.exp-mini a { display: flex; gap: 10px; align-items: center; padding: 10px; border: 1px solid var(--line); border-radius: 14px; transition: .15s; }
.exp-mini a:hover { border-color: var(--honey); background: var(--cream); }
.exp-mini img, .exp-mini .emo { width: 44px; height: 44px; object-fit: contain; flex-shrink: 0; display: grid; place-items: center; font-size: 1.6rem; }
.exp-mini small { font-size: .74rem; color: var(--ink-soft); font-weight: 700; }
.exp-mini b { display: block; color: var(--navy); font-size: .95rem; }
.warn { background: #FFF6F8; border-color: #F6CBD7; color: #B12A52; font-weight: 700; margin-top: 14px; }
.pick-h { font-size: 1.6rem; color: var(--navy); margin: 18px 0 8px; }
.ks-lab .h2 { margin-top: 6px; }

/* ───────── 허브 (sensor.html) ───────── */
.ks-hero { position: relative; overflow: hidden; background: linear-gradient(180deg, #FFF6DD 0%, var(--bg) 100%); border-bottom: 1px solid var(--line); }
.ks-hero .wrap { display: grid; grid-template-columns: 1.25fr 1fr; gap: 24px; align-items: center; padding-top: 34px; padding-bottom: 34px; }
.ks-hero .eyebrow { display: inline-flex; gap: 6px; align-items: center; font-weight: 800; color: #137A4B; background: #fff; border: 1px solid #A9DEC2; padding: 5px 12px; border-radius: 99px; font-size: .86rem; }
.ks-hero h1 { font-size: clamp(1.9rem, 4.2vw, 2.8rem); margin: 14px 0 12px; color: var(--navy); letter-spacing: -0.035em; }
.ks-hero h1 em { font-style: normal; background: linear-gradient(transparent 62%, #FFD873 62%); }
.ks-hero .lead { color: var(--ink-soft); font-size: 1.04rem; }
.ks-hero .row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.ks-hero .art { position: relative; display: grid; place-items: center; min-height: 260px; }
.ks-hero .art .plate { position: absolute; inset: 8% 4%; border-radius: 32px; background: var(--navy); box-shadow: 0 10px 0 var(--honey); overflow: hidden; }
.ks-hero .art .plate svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.ks-hero .art img { position: relative; width: 62%; max-width: 280px; filter: drop-shadow(0 14px 18px rgba(20, 33, 61, .3)); animation: hover 4s ease-in-out infinite; border-radius: 50%; }
.ks-hero .art .tag { position: absolute; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 6px 10px; font-weight: 800; font-size: .85rem; color: var(--navy); box-shadow: var(--shadow); }
.ks-hero .art .tag b { color: var(--honey-deep); font-variant-numeric: tabular-nums; }
@keyframes hover { 50% { transform: translateY(-10px); } }
.hstats { display: flex; gap: 22px; margin-top: 22px; flex-wrap: wrap; }
.hstats div { font-size: .85rem; color: var(--ink-soft); font-weight: 600; }
.hstats b { display: block; font-size: 1.5rem; color: var(--navy); font-weight: 850; }

section.block { padding: 44px 0 0; scroll-margin-top: 70px; }
.sec-title { display: flex; align-items: end; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.sec-title h2 { font-size: 1.5rem; color: var(--navy); }
.sec-title p { color: var(--ink-soft); font-size: .95rem; }

.filters { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.filters button { border: 1px solid var(--line); background: #fff; border-radius: 99px; padding: 7px 14px; font-weight: 750; color: var(--ink-soft); font-size: .9rem; }
.filters button.on { background: var(--navy); border-color: var(--navy); color: #fff; }
.term-block { margin-bottom: 18px; scroll-margin-top: 80px; }
.term-block h3 { font-size: 1.05rem; color: var(--navy); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.term-block h3 span { width: 10px; height: 10px; border-radius: 3px; background: var(--honey); display: inline-block; }
.exp-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 14px; }
.exp-card { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 16px; display: flex; flex-direction: column; gap: 10px; transition: .18s; min-width: 0; }
.exp-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--honey); }
.exp-card .top { display: flex; gap: 12px; align-items: center; }
.exp-card .ic { width: 64px; height: 64px; border-radius: 16px; background: var(--cream); border: 1px solid #F3DFAE; display: grid; place-items: center; flex-shrink: 0; overflow: hidden; }
.exp-card .ic img { width: 100%; height: 100%; object-fit: contain; padding: 4px; }
.exp-card .ic .emo { font-size: 2rem; }
.exp-card .unit { font-size: .78rem; font-weight: 800; color: var(--honey-deep); }
.exp-card h4 { font-size: 1.08rem; color: var(--navy); line-height: 1.35; margin: 0; }
.exp-card p { font-size: .9rem; color: #4A5368; flex: 1; }
.exp-card .foot { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.exp-card .foot .chip.dev { background: #EEF4FF; border-color: #CFE0FB; color: #2A5DB0; }
.exp-card .foot .chip.sim { background: var(--honey-soft); border-color: #F3DFAE; color: var(--navy); }
.exp-card .foot .done { margin-left: auto; font-size: .78rem; font-weight: 800; color: #137A4B; }

.brand-block { margin-bottom: 18px; }
.brand-block h3 { font-size: 1.05rem; color: var(--navy); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 4px; }
.brand-block > p { font-size: .88rem; color: var(--ink-soft); margin-bottom: 10px; }
.dev-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.dev { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 14px; transition: .18s; display: flex; flex-direction: column; gap: 4px; min-width: 0; }
a.dev:hover { border-color: var(--honey); box-shadow: var(--shadow); transform: translateY(-2px); }
.dev b { color: var(--navy); margin-top: 6px; }
.dev span { font-size: .8rem; color: var(--ink-soft); font-weight: 600; }
.dev .qs { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.dev .qs a, .dev .qs em { font-style: normal; font-size: .74rem; font-weight: 750; padding: 2px 8px; border-radius: 99px; background: var(--cream); border: 1px solid #F3DFAE; color: var(--navy); }
.dev .qs a:hover { background: var(--honey); }
.dev.soon { border-style: dashed; background: #FBF8F1; }
.dev.soon b, .dev.soon .dev-ic { opacity: .6; }
.dev.soon em { font-style: normal; align-self: flex-start; margin-top: 6px; font-size: .74rem; font-weight: 800; color: var(--ink-soft); background: #EFEAE0; padding: 2px 8px; border-radius: 99px; }
.dev .go { margin-top: 8px; font-size: .84rem; font-weight: 800; color: var(--honey-deep); }

.mb-box { display: grid; grid-template-columns: 1.2fr 1fr; gap: 16px; align-items: start; }
.mb-box > .card { margin: 0; }
.codebox { background: #14213D; color: #E6EDF8; border-radius: 14px; padding: 14px; font-size: .78rem; overflow-x: auto; line-height: 1.55; margin: 10px 0 0; max-width: 100%; }
.mb-qs { display: grid; gap: 8px; margin-top: 8px; }
.mb-qs div { display: grid; grid-template-columns: 112px 1fr; gap: 10px; font-size: .88rem; padding: 8px 10px; border-radius: 10px; background: #FBF8F1; }
.mb-qs b { color: var(--navy); }
.mb-qs span { color: #4A5368; }

.compat-wrap { overflow-x: auto; border-radius: 16px; }
.compat { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; font-size: .9rem; min-width: 520px; }
.compat th, .compat td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.compat th { background: #FBF6EA; font-size: .8rem; color: var(--ink-soft); }
.compat td small { display: block; color: var(--ink-soft); font-size: .78rem; }
.ok { color: #137A4B; font-weight: 800; }
.no { color: #B12A52; font-weight: 800; }
.tips { margin: 12px 0 0; padding: 14px 18px 14px 36px; background: #fff; border: 1px solid var(--line); border-radius: 16px; display: grid; gap: 6px; color: #333B4D; font-size: .93rem; }
.my-env { margin-top: 12px; padding: 12px 14px; border-radius: 14px; font-weight: 700; font-size: .92rem; background: #EFFAF4; border: 1px solid #A9DEC2; color: #137A4B; }
.my-env.bad { background: #FFF6F8; border-color: #F6CBD7; color: #B12A52; }

.sim-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.sim-card { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 14px; display: flex; gap: 12px; align-items: flex-start; min-width: 0; }
.sim-card > a:first-child { flex-shrink: 0; }
.sim-card b a:hover { color: var(--honey-deep); }
.sim-card b { display: block; color: var(--navy); }
.sim-card small { display: block; font-size: .76rem; color: var(--ink-soft); font-weight: 700; margin-bottom: 4px; }
.sim-card ul { list-style: none; margin: 6px 0 0; padding: 0; display: grid; gap: 3px; }
.sim-card li a { font-size: .86rem; font-weight: 700; color: var(--honey-deep); }
.sim-card li a:hover { text-decoration: underline; }

.records { display: grid; gap: 8px; }
.record { display: flex; gap: 12px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 10px 14px; min-width: 0; }
.record .e { font-size: 1.5rem; }
.record .t { flex: 1; min-width: 0; }
.record .t b { display: block; color: var(--navy); }
.record .t span { font-size: .8rem; color: var(--ink-soft); display: block; overflow-wrap: anywhere; }
.record .up { font-size: .74rem; font-weight: 800; color: #137A4B; white-space: nowrap; }
.empty { padding: 26px; text-align: center; color: var(--ink-soft); background: #fff; border-radius: 16px; border: 1px dashed var(--line); }
.teach-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }

/* ───────── 반응형 ───────── */
@media (max-width: 900px) {
  .intro-grid, .two, .mission-grid, .obs-grid, .mb-box { grid-template-columns: 1fr; }
  .ks-hero .wrap { grid-template-columns: 1fr; }
  .ks-hero .art { order: -1; min-height: 220px; }
  .save .form { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .card { padding: 16px; border-radius: 18px; }
  .bubble img { width: 52px; height: 52px; }
  .bubble p { font-size: .98rem; padding: 12px 13px; }
  .step-nav .btn.big { flex: 1; }
  .lab-title .ex-ic { width: 52px; height: 52px; }
  .lv-row { gap: 10px; }
  .bulb { width: 64px; height: 64px; }
  .bulb span { font-size: 2.6rem; }
  .leds { width: 78px; gap: 4px; padding: 7px; }
  .mb-qs div { grid-template-columns: 1fr; gap: 2px; }
  .sim-banner { flex-wrap: wrap; }
  .sim-banner .go { margin-left: 0; }
  .btn-grid { grid-template-columns: 1fr 1fr; }
}

/* ───────── 스마트폰 앱 안내 ───────── */
.phone-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 16px; }
.phone-grid .card + .card { margin-top: 0; }
.store-btns { display: flex; flex-wrap: wrap; gap: 10px; }
.store { display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px; border-radius: 14px; background: var(--navy); color: #fff; font-weight: 800; min-width: 210px; transition: .15s; }
.store:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.store small { display: block; font-size: .72rem; font-weight: 600; opacity: .8; }
.store .si { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; font-size: 1rem; background: rgba(255,255,255,.14); }
.store.android .si { color: #3DDC84; }
.store.ios .si::before { content: '🍎'; }
.steps { margin: 0; padding-left: 1.3em; }
.steps li { margin: 8px 0; color: #333B4D; }
.phone-exps { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.phone-exp { display: block; background: var(--cream); border: 1px solid #F3DFAE; border-radius: 14px; padding: 12px 14px; transition: .15s; }
.phone-exp:hover { border-color: var(--honey); box-shadow: var(--shadow); }
.phone-exp b { display: block; color: var(--navy); }
.phone-exp span { font-size: .84rem; color: var(--ink-soft); font-weight: 600; }
@media (max-width: 760px) { .phone-grid { grid-template-columns: 1fr; } .store { min-width: 0; flex: 1 1 100%; } }

/* ───────── 허브 탭 (메인 페이지와 같은 모양) ───────── */
.main-tabs { position: sticky; top: 64px; z-index: 30; display: flex; gap: 6px; margin: 18px -4px 0; padding: 8px 4px; overflow-x: auto; scrollbar-width: none;
  background: rgba(255, 252, 245, .94); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.main-tabs::-webkit-scrollbar { display: none; }
.main-tabs button { display: inline-flex; align-items: center; gap: 7px; border: 1px solid var(--line); background: #fff; border-radius: 12px; padding: 9px 16px; font-weight: 800; color: var(--ink-soft); white-space: nowrap; font-size: .95rem; }
.main-tabs button:hover { border-color: var(--honey); color: var(--navy); }
.main-tabs button.on { background: var(--navy); border-color: var(--navy); color: #fff; }
.main-tabs .hex-dot { width: 10px; height: 11px; clip-path: var(--hex-pointy); background: var(--honey); }
section.pane { display: none; padding-top: 20px; }
section.pane.on { display: block; }
.ks-hero .wrap { grid-template-columns: 1fr; padding-top: 22px; padding-bottom: 22px; }
.ks-hero h1 { margin-bottom: 0; }
@media (max-width: 640px) { .main-tabs { top: 56px; } .main-tabs button { padding: 8px 12px; font-size: .9rem; } }

/* ───────── 허브 히어로 그림 ───────── */
.ks-hero { background: linear-gradient(90deg, #FFF8E7 0%, #FFF8E7 34%, rgba(255,248,231,.75) 48%, rgba(255,248,231,0) 64%),
  url('../../assets/img/hero-sensor.webp?v=1') right center / auto 100% no-repeat #FFF8E7; }
.ks-hero .wrap { min-height: 300px; align-content: center; }
@media (max-width: 760px) {
  .ks-hero { background: linear-gradient(180deg, rgba(255,248,231,0) 0%, rgba(255,248,231,.4) 45%, #FFF8E7 72%),
    url('../../assets/img/hero-sensor.webp?v=1') 78% top / auto 62% no-repeat #FFF8E7; }
  .ks-hero .wrap { min-height: 0; padding-top: 190px; }
}

/* 학급 게시판 */
.board-form { display: flex; gap: 8px; margin: 12px 0; max-width: 480px; }
.board-form input { flex: 1; min-width: 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: 12px; font: inherit; }
.board-exp { margin-top: 14px; }
.board-exp h3 { font-size: 1rem; color: var(--navy); margin-bottom: 6px; }
.board-exp .table-scroll { overflow-x: auto; }

/* ── 센서 고르기 (실험에 쓸 수 있는 센서가 여러 개일 때) · 연결 방법 버튼 ── */
.dev-choice { margin-bottom: 16px; }
.choice-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 10px; margin-top: 10px; }
.choice { display: flex; gap: 10px; align-items: center; text-align: left; background: #fff; border: 2px solid var(--line); border-radius: 16px; padding: 10px 12px; cursor: pointer; font: inherit; color: inherit; min-width: 0; transition: .15s; }
.choice:hover { border-color: var(--honey); }
.choice.on { border-color: var(--navy); background: var(--honey-soft); box-shadow: 0 3px 0 var(--honey); }
.choice > span:last-child { display: flex; flex-direction: column; min-width: 0; }
.choice small { font-size: .74rem; font-weight: 850; color: var(--honey-deep); }
.choice b { color: var(--navy); line-height: 1.3; }
.choice em { font-style: normal; font-size: .78rem; font-weight: 650; color: var(--ink-soft); overflow-wrap: anywhere; }
.alt-note { margin-top: 8px; font-size: .84rem; }
.via-row { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 12px; }
.connect-card .via-row .btn.big { margin-top: 0; min-width: 0; flex: 1 1 170px; }
.filters.sub { margin-top: -6px; }
.filters.sub button { font-size: .82rem; padding: 5px 12px; }
.exp-card .foot .chip.alt { background: #EFFAF3; border-color: #CBEBD7; color: #1E7A4E; }
.credit { margin-top: 12px; font-size: .78rem; color: var(--ink-soft); }
.credit a { text-decoration: underline; }