:root{--teal:#0d9488;--teal-dark:#0f766e;--blue:#0ea5e5;--ink:#0f172a;--muted:#475569;--line:#cbd5e1;--bg:#f0fdfa;--err:#b91c1c;--ok:#166534}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5}
header.top{background:linear-gradient(135deg,var(--teal),var(--blue));color:#fff;padding:16px 20px;font-weight:700;font-size:1.2rem}
main{max-width:460px;margin:18px auto 40px;padding:0 14px}
.card{background:#fff;border-radius:14px;padding:20px 18px;box-shadow:0 1px 4px rgba(15,23,42,.1)}
h1,h2{margin:0 0 6px;line-height:1.25}
.sub{margin:0 0 14px;color:var(--muted);font-size:.95rem}
label{display:block;margin:14px 0 5px;font-weight:600;font-size:.92rem}
.opt{font-weight:400;color:var(--muted)}
input[type=text],input[type=email],input[type=password],input[type=tel],select{width:100%;min-height:46px;padding:10px 12px;border:1.5px solid var(--line);border-radius:10px;font-size:16px;background:#fff;color:var(--ink)}
input:focus,select:focus,button:focus-visible,a:focus-visible{outline:3px solid rgba(14,165,229,.45);outline-offset:1px;border-color:var(--blue)}
input[aria-invalid=true]{border-color:var(--err)}

/* Password box with Show/Hide. The toggle is a small button that sits INSIDE the input's right edge. */
.pw{position:relative}
.pw input{padding-right:76px}
.pw-toggle{position:absolute;right:6px;top:50%;transform:translateY(-50%);display:block;width:auto;min-width:58px;min-height:40px;margin:0;padding:0 10px;background:transparent;color:var(--teal-dark);border:0;border-radius:8px;font:inherit;font-size:.9rem;font-weight:600;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}
.pw-toggle:hover,.pw-toggle:active{background:rgba(13,148,136,.12)}

.hint{margin:4px 0 0;color:var(--muted);font-size:.82rem}
.err{margin-top:5px;color:var(--err);font-size:.86rem}
.check{display:flex;gap:10px;align-items:flex-start;margin-top:16px;font-weight:400}
.check input{width:22px;height:22px;margin:1px 0 0;flex:none}

/* Main action buttons ONLY (submit buttons and .btn links) */
.btn,button[type=submit]{display:block;width:100%;min-height:48px;margin-top:18px;padding:12px 18px;background:var(--teal);color:#fff;border:0;border-radius:10px;font:inherit;font-size:1rem;font-weight:600;text-align:center;text-decoration:none;cursor:pointer}
.btn:hover,button[type=submit]:hover{background:var(--teal-dark)}
button[type=submit][disabled]{opacity:.75;cursor:wait}
button[type=submit][aria-busy=true]::after{content:"";display:inline-block;width:14px;height:14px;margin-left:10px;vertical-align:-2px;border:2px solid #fff;border-right-color:transparent;border-radius:50%;animation:spin .8s linear infinite}
/* Text-style button (e.g. Log out) */
button.link,button[type=submit].link{display:inline;width:auto;min-height:0;margin:0;padding:0;background:none;color:var(--teal-dark);border-radius:0;font-size:1rem;font-weight:400;text-decoration:underline}
button.link:hover,button[type=submit].link:hover{background:none}

.alert{padding:11px 13px;border-radius:10px;margin-bottom:14px;font-size:.95rem}
.alert.error{background:#fee2e2;color:#991b1b}
.alert.success{background:#dcfce7;color:var(--ok)}
.foot{margin:16px 0 0;text-align:center;font-size:.95rem}
a{color:var(--teal-dark)}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){button[type=submit][aria-busy=true]::after{animation:none}}

/* Login page helpers */
.row{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.small{font-size:.88rem}
.divider{display:flex;align-items:center;gap:10px;margin:20px 0 0;color:var(--muted);font-size:.85rem}
.divider::before,.divider::after{content:"";flex:1;height:1px;background:var(--line)}
.btn.secondary{margin-top:14px;background:#fff;color:var(--teal-dark);border:1.5px solid var(--teal)}
.btn.secondary:hover{background:#ecfeff}

.alert.info{background:#e0f2fe;color:#075985}

/* Development API tester: normal-sized touch buttons */
.tester button{display:inline-block;width:auto;min-height:44px;margin:8px 8px 0 0;padding:8px 14px;background:var(--teal);color:#fff;border:0;border-radius:10px;font:inherit;font-size:.9rem;font-weight:600;cursor:pointer}
.tester button:disabled{opacity:.6;cursor:wait}