@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{--teal:#168486;--light:#73d8d5;--ink:#252525;--grey:#687779;--line:#e3eaea;--pale:#eff7f6;--white:#fff;font-family:'Space Grotesk','Noto Sans JP',sans-serif;color:var(--ink);background:#fff;font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,.button{cursor:pointer;border:0;background:var(--teal);color:white;padding:13px 22px;border-radius:8px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:10px;font-size:14px}button:hover,.button:hover{filter:brightness(.94)}button:disabled{opacity:.4;cursor:not-allowed}.secondary{background:white;color:var(--ink);border:1px solid var(--line)}.danger{background:#fbeded;color:#a63636}.small{padding:8px 13px;font-size:12px}.full{width:100%}.accent{color:var(--teal)}header{height:88px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 max(5vw,24px);gap:20px;background:#fff}.brand{display:flex;gap:12px;align-items:center;font-weight:700;font-size:25px;letter-spacing:-1px}.mark{display:flex;gap:4px;align-items:flex-end;width:31px;height:28px}.mark i{width:7px;background:var(--teal);transform:skewY(-20deg);border-radius:2px}.mark i:nth-child(1){height:12px}.mark i:nth-child(2){height:20px}.mark i:nth-child(3){height:28px}header nav,#identity{display:flex;gap:22px;align-items:center;font-size:13px}#language{padding:8px;background:#f1f5f5;color:var(--ink)}main{max-width:1220px;margin:auto;padding:44px 32px 80px}h1,h2,h3,p{margin:0}h1{font-size:clamp(34px,4.8vw,66px);line-height:1.35;letter-spacing:-.04em}h2{font-size:27px;line-height:1.5;letter-spacing:-.025em}h3{font-size:18px;line-height:1.6}p{line-height:1.9}small,.muted,.hint{color:var(--grey)}.hint{font-size:12px;margin-top:10px}.eyebrow{font-size:11px;letter-spacing:.13em;font-weight:600;text-transform:uppercase;color:var(--teal);margin-bottom:18px}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:72px;align-items:center;padding:52px 0 76px}.hero p.lead{font-size:17px;margin-top:25px;max-width:530px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:23px}.hero-art{background:#f0f7f6;border-radius:24px;padding:32px;position:relative}.practice{background:#fff;border:1px solid var(--line);border-radius:15px;padding:30px;box-shadow:0 18px 40px #183b3b0a}.practice .word{font-size:58px;letter-spacing:-2px;margin:15px 0}.wave{display:flex;align-items:center;gap:5px;height:60px;margin:22px 0}.wave i{display:block;width:5px;background:var(--teal);border-radius:6px}.phoneme{display:flex;gap:9px;margin-top:16px}.phoneme span{border:1px solid var(--line);border-radius:6px;padding:8px 18px;font-size:19px}.phoneme span:first-child{background:var(--pale);border-color:var(--light);color:var(--teal)}.floating{background:var(--teal);color:#fff;border-radius:10px;padding:16px 20px;margin:20px -10px -10px 40px;font-size:13px}.facts{display:grid;grid-template-columns:repeat(3,1fr);border-block:1px solid var(--line);padding:25px 0;text-align:center}.facts div+div{border-left:1px solid var(--line)}.facts strong{display:block;font-size:24px}.facts span{font-size:12px;color:var(--grey)}.section{padding:75px 0 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:30px}.section-head p{max-width:450px;color:var(--grey);font-size:14px}.three{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.card{border:1px solid var(--line);border-radius:14px;background:white;padding:28px;margin-bottom:22px}.card>p{margin-top:12px}.step-number{font-size:12px;color:var(--teal);margin-bottom:28px;display:block}.price{font-size:37px;font-weight:600;letter-spacing:-1px;margin:14px 0}.price small{font-size:12px;letter-spacing:0;font-weight:400}.package.popular{border:2px solid var(--teal)}.badge{display:inline-block;background:var(--pale);color:var(--teal);border-radius:5px;padding:5px 10px;font-size:11px}.rules{background:#f6f8f8;border-radius:14px;padding:28px;margin-top:15px}.rules p{font-size:13px}.faq details{padding:20px 0;border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:600;font-size:15px}.faq p{font-size:14px;color:var(--grey);margin-top:12px}.contact{margin-top:60px;padding:38px;background:var(--pale);border-radius:16px;display:flex;align-items:center;justify-content:space-between;gap:25px}footer{border-top:1px solid var(--line);padding:30px max(5vw,24px);display:flex;justify-content:space-between;gap:20px;font-size:12px;color:var(--grey)}.auth-wrap{max-width:450px;margin:45px auto}.auth-wrap h1{font-size:33px;margin-bottom:16px}label{display:block;font-size:13px;font-weight:500;margin:17px 0 6px}input,select,textarea{display:block;width:100%;border:1px solid #cbd7d7;background:#fff;border-radius:7px;padding:12px;margin-top:7px;color:var(--ink)}textarea{min-height:130px;resize:vertical}:focus-visible{outline:3px solid var(--light);outline-offset:3px}.error{color:#a63636;font-size:13px}.notice{background:var(--pale);padding:16px;border-radius:8px;font-size:13px;margin-bottom:20px}.intro{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:12px 0 34px}.intro h1{font-size:36px}.intro p{font-size:14px}.balance strong{font-size:44px;color:var(--teal);display:block}.balance{text-align:right}.balance span{font-size:12px;color:var(--grey)}.tabs{display:flex;gap:8px;border-bottom:1px solid var(--line);margin-bottom:30px;overflow:auto}.tab{white-space:nowrap;border-radius:0;background:white;color:var(--grey);padding:16px}.tab.active{color:var(--teal);border-bottom:3px solid var(--teal)}.grid{display:grid;grid-template-columns:1.65fr 1fr;gap:25px}.featured{background:var(--pale);border-color:transparent}.row{display:flex;justify-content:space-between;align-items:center;gap:15px}.wrap{flex-wrap:wrap}.lesson{padding:23px 0;border-bottom:1px solid var(--line)}.lesson:last-child{border-bottom:0}.notes,.bank{white-space:pre-wrap;background:#f7f9f9;border-radius:7px;padding:16px;margin-top:15px;font-size:14px}.recording{margin-top:18px;border-top:1px solid var(--line);padding-top:18px}.slots{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.slot{margin:0}.split{display:grid;grid-template-columns:1fr 1fr;gap:20px}.empty{padding:30px;color:var(--grey)}.ref{font-family:monospace;font-size:11px;overflow-wrap:anywhere}.username{font-size:13px}dialog{border:1px solid var(--line);border-radius:16px;max-width:600px;width:calc(100% - 30px);padding:30px}dialog::backdrop{background:#172e2e66}.close-dialog{margin-top:20px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#252525;color:#fff;border-radius:9px;padding:16px 24px;z-index:10;max-width:90vw;display:none;font-size:14px}video{width:100%;margin-top:16px}#call-frame{height:70vh;margin-top:20px}progress{width:100%;margin-top:22px}.skip{position:absolute;left:-9999px}.skip:focus{left:10px;top:5px;z-index:20;background:white}.loading{padding:60px;text-align:center}.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.stat-row .card{padding:20px}.stat-row strong{font-size:30px;display:block}.preview-banner{background:#fff3d6;padding:12px;text-align:center;font-size:13px}.mini{font-size:12px}.mobile-hide{display:inline}
@media(max-width:800px){header{height:72px;padding:0 20px}header nav{gap:10px}.mobile-hide,.username{display:none}main{padding:24px 20px 55px}.hero{grid-template-columns:1fr;gap:35px;padding:30px 0 40px}.hero h1{font-size:42px}.hero-art{padding:22px}.three,.grid{grid-template-columns:1fr}.slots{grid-template-columns:1fr 1fr}.section{padding-top:45px}.section-head,.contact{align-items:start;flex-direction:column}.intro h1{font-size:28px}.card{padding:22px}.split{grid-template-columns:1fr}.facts strong{font-size:20px}footer{flex-direction:column}.brand{font-size:22px}.stat-row{gap:8px}.stat-row .card{padding:12px}.tab{padding:13px 10px;font-size:12px}}@media(max-width:450px){.slots{grid-template-columns:1fr}.hero h1{font-size:36px}.hero-art .word{font-size:48px}}

/* SayStride learning tools */
.classroom-layout{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(310px,1fr);gap:20px;align-items:start;margin-top:20px}
.classroom-layout #call-frame{height:min(72vh,750px);min-height:430px;margin-top:0}
.classroom-learning{border:1px solid var(--line);border-radius:14px;padding:18px;background:#fff;min-width:0;max-height:76vh;overflow:auto}
#modal:has(#learning-panel){max-width:780px}
.learning-top h3{margin-bottom:5px}.learning-top .hint{margin-top:0}
.learning-tabs{display:flex;gap:6px;margin:16px 0;border-bottom:1px solid var(--line)}
.learning-tabs button{background:transparent;color:var(--grey);padding:10px;font-size:12px;border-radius:0}
.learning-tabs button.active{color:var(--teal);border-bottom:2px solid var(--teal)}
.learning-item{padding:14px 0;border-bottom:1px solid var(--line);overflow-wrap:anywhere}
.learning-item strong{display:block;margin:8px 0;font-size:15px}.learning-item p{line-height:1.55}
.learning-original{text-decoration:line-through;color:var(--grey)}
.learning-controls{display:flex;align-items:start;gap:12px;margin-top:8px;flex-wrap:wrap}
.learning-manage{margin-top:16px;padding-top:12px;border-top:1px solid var(--line)}
.learning-manage h3{font-size:17px;margin-bottom:10px}
.learning-fields{display:grid;gap:10px;margin:12px 0}
.learning-fields textarea,.learning-fields input,.learning-manage select{width:100%;margin-top:5px}
.learning-form button{margin-top:8px}
.learning-manage details,.learning-controls details{margin:10px 0}
.learning-manage summary,.learning-controls summary{cursor:pointer;color:var(--teal);font-weight:600;font-size:13px}
.learning-material-text{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.65;margin-top:8px}
.learning-file{text-decoration:underline;color:var(--teal);display:inline-block;margin-top:8px}
@media(max-width:850px){.classroom-layout{grid-template-columns:1fr}.classroom-layout #call-frame{height:54vh;min-height:320px}.classroom-learning{max-height:none}}

/* SayStride calendar v2 — 15-minute teacher grid, date-first student booking */
.calendar-intro,.student-calendar-intro{margin-bottom:22px}
.calendar-intro h2,.student-calendar-intro h2{margin-bottom:6px}
.calendar-intro .muted,.student-calendar-intro .muted{font-size:14px;line-height:1.65}
.calendar-toolbar{border:1px solid var(--line);border-radius:14px 14px 0 0;padding:16px 18px;display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;background:#fbfdfd}
.calendar-nav,.calendar-tools{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.calendar-nav strong{font-size:15px;white-space:nowrap;margin:0 8px}
.calendar-helper{padding:10px 14px;border:1px solid var(--line);border-top:0;border-bottom:0;font-size:12px;color:var(--grey);background:#fff}
.calendar-selected-count{font-weight:600;font-size:12px;color:var(--teal);white-space:nowrap}
.calendar-legend{display:flex;gap:18px;flex-wrap:wrap;align-items:center;padding:12px 15px;border:1px solid var(--line);border-bottom:0;font-size:12px;color:var(--grey)}
.calendar-legend span{display:flex;gap:6px;align-items:center}
.cal-key{display:inline-block;width:12px;height:12px;border-radius:3px;background:#eff2f3;border:1px solid #dae4e4}.cal-key-open{background:#d8efed;border-color:#8ec9c6}.cal-key-booked{background:#f9e9ca;border-color:#e9bd73}.cal-key-selected{background:#147f82;border-color:#147f82}
.calendar-scroll{max-height:69vh;min-height:320px;overflow:auto;overscroll-behavior:contain;border:1px solid var(--line);border-radius:0 0 14px 14px;scrollbar-gutter:stable}
.calendar-grid{display:grid;grid-template-columns:70px repeat(7,minmax(82px,1fr));min-width:680px;background:#e5eeee;gap:1px}
.calendar-corner,.calendar-day-head{position:sticky;top:0;z-index:3;border-radius:0;display:flex;flex-direction:column;justify-content:center;align-items:center;min-height:72px;background:#f7faf9;color:var(--ink);padding:10px 6px;text-align:center}
.calendar-corner{left:0;z-index:5;font-size:12px;font-weight:700;color:var(--grey)}
.calendar-day-head strong{font-size:13px;white-space:nowrap}.calendar-day-head small{font-size:10px;color:var(--grey);font-weight:400;margin-top:4px}
.calendar-day-head:not(:disabled):hover{background:#eaf7f6}.calendar-day-head:disabled{opacity:1;cursor:default}
.calendar-time{position:sticky;left:0;z-index:2;height:39px;background:#f8fbfb;padding:11px 6px;text-align:center;font-size:12px;color:#637474;font-variant-numeric:tabular-nums}
.calendar-cell{height:39px;min-width:0;border-radius:0;padding:0 3px;border:2px solid transparent;font-size:11px;font-weight:600;transition:background-color .1s ease}
.calendar-cell.status-closed{background:#f1f4f5;color:#6b7b7b}.calendar-cell.status-closed:hover{background:#e3eded}
.calendar-cell.status-open{background:#ddf2ef;color:#0d7775}.calendar-cell.status-open:hover{background:#c6e8e4}
.calendar-cell.status-booked{background:#f9e9ca;color:#8b5b0a}.calendar-cell.status-past{background:#fafafa;color:#a5b0b0}
.calendar-cell.status-booked:disabled,.calendar-cell.status-past:disabled{opacity:1;cursor:not-allowed}
.calendar-cell.selected,.calendar-cell.selected:hover{background:#147f82;color:#fff;border-color:#0f666a}
.calendar-cell:focus-visible,.calendar-day-head:focus-visible{outline:3px solid #195d60;outline-offset:-3px;z-index:2}
.calendar-month-settings{margin-top:18px;border:1px solid var(--line);border-radius:12px;padding:20px;background:#fff}
.calendar-month-settings>summary{font-size:15px}.calendar-month-form{display:flex;align-items:end;gap:12px;flex-wrap:wrap;margin-top:12px}.calendar-month-form label{margin:0;min-width:180px}.calendar-month-form button{margin-bottom:0}
.calendar-error{padding:20px;border:1px solid #f1d4d4;border-radius:8px}
.student-date-bar{display:flex;align-items:end;gap:12px;margin-bottom:14px}.student-date-picker{margin:0;min-width:210px}.student-date-picker input{margin-top:5px}
.student-date-strip{display:flex;gap:8px;overflow-x:auto;margin-bottom:18px;padding:4px 2px 10px}.student-day-chip{border:1px solid var(--line);background:#fff;color:var(--ink);white-space:nowrap;min-width:100px;border-radius:10px;padding:12px 14px;font-size:12px;font-weight:600}.student-day-chip.active{background:var(--pale);border-color:var(--teal);color:var(--teal)}
.student-result-title{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:15px}.student-result-title .eyebrow{margin-bottom:5px}.student-result-title h3{font-size:18px}
.student-times{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.student-time{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;background:#fff;color:var(--ink);border:1px solid #d5e5e5;border-radius:12px;min-height:87px;padding:15px;gap:5px}
.student-time:hover{border-color:var(--teal);background:var(--pale)}.student-time:focus-visible{outline:3px solid var(--light)}.student-time strong{font-size:24px;font-variant-numeric:tabular-nums}.student-time small{font-size:11px;color:var(--grey)}
.student-time:disabled{opacity:.45;cursor:not-allowed}
@media(max-width:800px){.student-times{grid-template-columns:repeat(3,minmax(0,1fr))}.calendar-scroll{max-height:64vh}.calendar-toolbar{padding:12px}.calendar-nav strong{font-size:13px;margin:0 3px}}
@media(max-width:550px){.student-times{grid-template-columns:repeat(2,minmax(0,1fr))}.student-time strong{font-size:21px}.student-day-chip{min-width:85px}.calendar-nav,.calendar-tools{width:100%}.calendar-scroll{max-height:60vh}}