:root{color-scheme:light;--ink:#15201c;--muted:#66736d;--faint:#8a9791;--line:#dce5df;--soft:#f4f7f5;--green:#0f6b4d;--green-dark:#0a4d38;--green-pale:#eaf4ef;--cream:#f4f1e9;--error:#b42318;--shadow:0 26px 80px rgba(20,38,30,.12)}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{min-height:100%;margin:0}
body{font-family:Inter,"Noto Sans JP","Hiragino Sans",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased}
button,input,select{font:inherit}
button{color:inherit}
.login-layout{min-height:100vh;display:grid;grid-template-columns:minmax(380px,44%) 1fr}
.login-story{position:sticky;top:0;height:100vh;overflow:hidden;display:flex;flex-direction:column;padding:42px 54px 46px;background:var(--green-dark);color:#fff}
.login-story::before{content:"";position:absolute;width:560px;height:560px;right:-300px;top:-180px;border:1px solid rgba(255,255,255,.12);border-radius:50%;box-shadow:0 0 0 78px rgba(255,255,255,.035),0 0 0 156px rgba(255,255,255,.025)}
.login-story::after{content:"";position:absolute;left:-120px;bottom:-240px;width:480px;height:480px;border-radius:50%;background:rgba(255,255,255,.035)}
.brand,.mobile-brand{display:inline-flex;align-items:center;position:relative;z-index:1}
.brand{align-self:flex-start;padding:4px 9px;border-radius:11px;background:var(--cream);box-shadow:0 10px 28px rgba(1,31,21,.2)}
.brand-logo{display:block;width:150px;height:auto}
.story-copy{position:relative;z-index:1;margin:auto 0;max-width:520px;padding:70px 0}
.eyebrow{margin:0 0 16px;font-size:11px;font-weight:800;letter-spacing:.2em;color:#7d8c85}
.login-story .eyebrow{color:#b7cec4}
.story-copy h1{font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(38px,3.15vw,50px);line-height:1.25;letter-spacing:.015em;margin:0 0 26px;font-weight:600}
.story-copy>p:last-child{max-width:430px;margin:0;color:#c8d9d2;font-size:15px;line-height:1.9}
.demo-invite{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:14px;margin:0 0 18px;padding:14px 18px;border:1px solid rgba(255,255,255,.22);border-radius:12px;color:#fff;text-decoration:none;background:rgba(255,255,255,.05);transition:background .15s,border-color .15s}
.demo-invite:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.4)}
.demo-invite-copy{display:grid;gap:3px;min-width:0}
.demo-invite-copy strong{font-size:13.5px;font-weight:750}
.demo-invite-copy small{color:#c5d9d0;font-size:11.5px}
.demo-invite b{font-size:16px;font-weight:500}
.demo-invite-mobile{display:none;margin-top:26px;padding-top:20px;border-top:1px solid var(--line);color:var(--green);font-size:12.5px;font-weight:700;text-decoration:none;line-height:1.7}
.security-note{position:relative;z-index:1;margin:0;font-size:12px;color:#c5d9d0;display:flex;align-items:center;gap:9px}
.security-note span{display:inline-grid;place-items:center;width:20px;height:20px;border:1px solid rgba(255,255,255,.35);border-radius:50%}
.login-panel{display:grid;place-items:center;padding:54px 48px;background:linear-gradient(140deg,#fff 30%,#fafbf9)}
.login-card{width:min(100%,460px)}
.mobile-brand{display:none;margin-bottom:54px}
.login-card h2{font-size:29px;line-height:1.35;letter-spacing:-.025em;margin:0 0 10px}
.lead{margin:0 0 26px;color:var(--muted);font-size:14px;line-height:1.75}
.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:4px;margin-bottom:24px;padding:4px;border-radius:12px;background:#eef2ef}
.auth-tabs button{height:42px;border:0;border-radius:9px;background:transparent;color:var(--muted);font-size:13px;font-weight:750;cursor:pointer}
.auth-tabs button[aria-selected="true"]{background:#fff;color:var(--ink);box-shadow:0 2px 8px rgba(20,38,30,.08)}
form{display:grid;gap:18px}
label{display:grid;gap:8px;font-size:13px;font-weight:700}
label small{margin-left:4px;color:var(--faint);font-size:11px;font-weight:600}
label>.purpose-field-hint{margin:-3px 0 0;color:var(--faint);font-size:11px;font-weight:500;line-height:1.5}
input,select{width:100%;height:52px;border:1px solid #ccd8d1;border-radius:10px;background:#fff;color:var(--ink);padding:0 15px;outline:none;transition:border-color .15s,box-shadow .15s}
input::placeholder{color:#a0aaa5}
input:focus,select:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(15,107,77,.11)}
.password-field{display:block;position:relative}
.password-field input{padding-right:68px}
.password-field button{position:absolute;right:8px;top:8px;height:36px;border:0;border-radius:7px;padding:0 10px;background:#f0f4f1;color:#526159;font-size:12px;font-weight:750;cursor:pointer}
.password-field button:hover{background:#e5ece8}
.form-intro{margin:0;padding:13px 15px;border-radius:10px;background:var(--green-pale);color:#486259;font-size:12px;line-height:1.7}
.invite-summary{display:flex;align-items:center;gap:12px;margin:-5px 0 22px;padding:13px 15px;border:1px solid #cfe1d7;border-radius:11px;background:var(--green-pale)}
.invite-workspace-mark{display:grid;place-items:center;width:30px;height:30px;flex:0 0 auto;border-radius:9px;background:var(--green);color:#fff;font-size:13px;font-weight:800}
.invite-summary div{display:grid;gap:2px;min-width:0}.invite-summary strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:13px}.invite-summary small{color:var(--muted);font-size:11px}
#invite-form{gap:14px}.profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
#workspace-login-form{gap:16px}
.profile-privacy{margin:0;padding:11px 13px;border-radius:9px;background:var(--soft);color:var(--muted);font-size:10.5px;line-height:1.65}.profile-privacy a{color:var(--green);font-weight:700}
.optional-consent{display:flex;grid-template-columns:none;align-items:flex-start;gap:9px;color:var(--muted);font-size:11px;font-weight:600;line-height:1.55}.optional-consent input{width:18px;height:18px;flex:0 0 auto;margin:1px 0 0;padding:0;accent-color:var(--green)}.optional-consent span{display:inline}.optional-consent small{font-size:10px}
.invite-recovery{display:grid;gap:12px}.secondary-link{display:inline-flex;min-height:46px;align-items:center;justify-content:center;border:1px solid #bdcec5;border-radius:10px;color:var(--green);font-size:13px;font-weight:750;text-decoration:none}
.form-error{display:none;margin:-3px 0 0;padding:11px 13px;border-radius:8px;background:#fff1f0;color:var(--error);font-size:12px;line-height:1.6}
.form-error:not(:empty),.form-error.visible{display:block}
.login-button,.secondary-button{height:54px;border-radius:10px;padding:0 18px;display:flex;align-items:center;justify-content:center;gap:12px;font-weight:780;cursor:pointer;transition:background .15s,transform .15s,opacity .15s}
.login-button{border:0;background:var(--green);color:#fff;box-shadow:0 12px 24px rgba(15,107,77,.18)}
.login-button:hover{background:#0b5c42;transform:translateY(-1px)}
.secondary-button{border:1px solid #bdcec5;background:#fff;color:var(--green)}
.secondary-button:hover{background:#f6faf8}
.login-button:disabled,.secondary-button:disabled{cursor:wait;opacity:.65;transform:none}
.login-button b{font-size:18px;font-weight:500}
.loading-state{min-height:180px;display:grid;place-items:center;align-content:center;gap:13px;color:var(--muted)}
.loading-state p{margin:0;font-size:12px}
.loading-dot{width:24px;height:24px;border:2px solid #d5e2dc;border-top-color:var(--green);border-radius:50%;animation:spin .75s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:980px){.login-story{padding-left:38px;padding-right:38px}.login-panel{padding-left:34px;padding-right:34px}}
@media(max-width:820px){.login-layout{display:block}.login-story{display:none}.login-panel{min-height:100vh;padding:30px 22px 54px}.mobile-brand{display:flex}.mobile-brand .brand-logo{width:144px}.login-card{padding:0 4px}.login-card h2{font-size:25px}.login-card>.eyebrow{margin-bottom:12px}.demo-invite-mobile{display:block}}
@media(max-width:520px){.profile-grid{grid-template-columns:1fr}}
@media(max-width:420px){.login-panel{align-items:start;padding-top:24px}.mobile-brand{margin-bottom:46px}.lead{margin-bottom:22px}.auth-tabs{margin-bottom:22px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.loading-dot{animation-duration:1.5s}.login-button{transition:none}}
.google-login-button{display:flex;align-items:center;justify-content:center;gap:11px;height:54px;margin-bottom:18px;border:1px solid #ccd8d1;border-radius:10px;background:#fff;color:var(--ink);font-size:14px;font-weight:750;text-decoration:none;transition:background .15s,border-color .15s,transform .15s}
.google-login-button:hover{background:#f6faf8;border-color:#b3c5bc;transform:translateY(-1px)}
.google-login-button svg{flex:0 0 auto}
#auth-page-error{margin:0 0 16px}
.auth-divider{display:flex;align-items:center;gap:12px;margin-bottom:18px;color:var(--faint);font-size:11px;font-weight:700}
.auth-divider::before,.auth-divider::after{content:"";flex:1;height:1px;background:var(--line)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(15,107,77,.32);outline-offset:2px;border-radius:6px}
.auth-tabs button:hover:not([aria-selected="true"]){color:var(--ink,#15201c)}
.secondary-link:hover{text-decoration:underline}

/* 復旧導線: 自動のパスワード再設定はまだ無いため、少なくとも連絡先を明示する */
.login-recovery{margin:14px 0 0;color:var(--muted,#6e7874);font-size:11.5px;line-height:1.6}
.login-recovery a{color:var(--blue,#2875ef)}