/* STEM Cloud: styles for login, account, admin, privacy and offline pages. Palette comes from the logo (navy + sky blue). */
:root{--bg:#f1f6fc;--card:#ffffff;--text:#0f1f3a;--dim:#4a5b78;--line:#d6e0f0;--acc:#0b72bd;--acc2:#2c4fbf;--on-acc:#ffffff;--bad:#c62f47;--ok:#0b7a64;--field:#f6f9fd;--glow:rgba(11,114,189,.14)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0a1220;--card:#111c30;--text:#e8eefb;--dim:#a7b6d0;--line:#24344f;--acc:#4cc3f0;--acc2:#8aa8ff;--on-acc:#06182b;--bad:#ff7a8f;--ok:#5ee0c2;--field:#0c1626;--glow:rgba(76,195,240,.16);color-scheme:dark}}
:root[data-theme="dark"]{--bg:#0a1220;--card:#111c30;--text:#e8eefb;--dim:#a7b6d0;--line:#24344f;--acc:#4cc3f0;--acc2:#8aa8ff;--on-acc:#06182b;--bad:#ff7a8f;--ok:#5ee0c2;--field:#0c1626;--glow:rgba(76,195,240,.16);color-scheme:dark}
*{box-sizing:border-box}
html,body{margin:0}
body{background:radial-gradient(ellipse 90% 45% at 50% 0%,var(--glow),transparent 70%),var(--bg);background-attachment:fixed;color:var(--text);font-family:Inter,"Segoe UI",system-ui,"Noto Sans Tamil",sans-serif;line-height:1.55;min-height:100vh;padding:max(20px,env(safe-area-inset-top)) 16px max(20px,env(safe-area-inset-bottom))}
.wrap{max-width:440px;margin:0 auto}
.wrap.wide{max-width:960px}

/* brand: logo mark + name (every page that uses .brand gets the mark) */
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.4rem;letter-spacing:.2px;margin:6px 0 2px}
.brand::before{content:'';flex:0 0 auto;width:48px;height:31px;background:url(/static/brand/logo-mark.png) center/contain no-repeat}
.brand span{color:var(--acc)}
.tag{color:var(--dim);margin:0 0 18px}

/* login hero */
.lhero{text-align:center;padding:10px 0 20px}
.lmark{display:block;width:168px;max-width:52vw;height:auto;margin:0 auto 6px;filter:drop-shadow(0 10px 22px var(--glow))}
.lname{font-size:2rem;line-height:1.1;margin:6px 0 4px;letter-spacing:.3px}
.lname span{color:var(--acc)}
.ltag{margin:0 auto;color:var(--dim);max-width:30ch}
.chips{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px;justify-content:center}
.chips li{font-size:.8rem;font-weight:600;padding:5px 12px;border-radius:99px;background:var(--card);border:1px solid var(--line);color:var(--dim)}

.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px;margin-bottom:16px;box-shadow:0 10px 30px -18px rgba(15,31,58,.35)}
h1,h2{margin:0 0 10px;text-wrap:balance}
h1{font-size:1.35rem} h2{font-size:1.1rem}
label{display:block;font-weight:600;font-size:.9rem;margin:14px 0 5px}
input[type=text],input[type=password]{width:100%;font:inherit;font-size:1rem;color:var(--text);background:var(--field);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;min-height:48px}
input:focus{outline:3px solid color-mix(in srgb,var(--acc) 40%,transparent);border-color:var(--acc)}
.pw-wrap{position:relative}
.pw-wrap input{padding-right:56px}
.pw-wrap .eye{position:absolute;right:4px;top:50%;transform:translateY(-50%);width:44px;height:44px;border:0;border-radius:10px;background:none;color:var(--dim);font-size:1.15rem;cursor:pointer}
.hint{color:var(--dim);font-size:.82rem;margin-top:5px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:700;cursor:pointer;border:1.5px solid var(--line);background:var(--card);color:var(--text);border-radius:12px;padding:10px 16px;min-height:44px;text-decoration:none}
.btn.pri{background:linear-gradient(135deg,var(--acc),var(--acc2));border:none;color:var(--on-acc);box-shadow:0 8px 20px -10px var(--acc2)}
.btn.bad{border-color:var(--bad);color:var(--bad)}
.btn.sm{min-height:36px;padding:6px 10px;font-size:.85rem}
.btn.full{width:100%;margin-top:18px;min-height:50px;font-size:1.02rem}
.btn:disabled{opacity:.6;cursor:wait}
.tabs{display:flex;gap:6px;background:var(--field);border:1px solid var(--line);border-radius:14px;padding:4px;margin-bottom:6px}
.tabs button{flex:1;font:inherit;font-weight:700;border:0;background:transparent;color:var(--dim);border-radius:10px;padding:10px;min-height:44px;cursor:pointer}
.tabs button.on{background:var(--card);color:var(--text);box-shadow:0 1px 6px rgba(0,0,0,.18)}
.msg{margin-top:12px;font-size:.92rem;min-height:1.2em}
.msg.err{color:var(--bad);font-weight:600} .msg.ok{color:var(--ok);font-weight:600}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.foot{color:var(--dim);font-size:.82rem;text-align:center;margin-top:18px}
.foot a,a.lnk{color:var(--acc)}
table{width:100%;border-collapse:collapse;font-size:.88rem}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:middle}
th{color:var(--dim);font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.05em}
.tw{overflow-x:auto}
.pill{display:inline-block;border-radius:99px;padding:1px 9px;font-size:.75rem;font-weight:700;background:var(--field);border:1px solid var(--line)}
.pill.admin{border-color:var(--acc);color:var(--acc)}
.stats{display:flex;gap:12px;flex-wrap:wrap}
.stat{flex:1;min-width:110px;background:var(--field);border:1px solid var(--line);border-radius:12px;padding:10px 12px}
.stat b{display:block;font-size:1.4rem;font-variant-numeric:tabular-nums}

/* Admin create user card */
.create-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:10px}
@media (max-width:600px){.create-grid{grid-template-columns:1fr}}
.create-grid .full-w{grid-column:1 / -1}
select{width:100%;font:inherit;font-size:1rem;color:var(--text);background:var(--field);border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;min-height:48px}
.pw-gen-wrap{display:flex;gap:8px}
.pw-gen-wrap input{flex:1}
.pw-gen-btn{flex:0 0 auto;white-space:nowrap}
.cred-card{margin-top:14px;padding:14px;background:color-mix(in srgb,var(--ok) 12%,var(--card));border:1.5px solid var(--ok);border-radius:14px}
.cred-card b{color:var(--ok)}
.cred-row{display:flex;gap:8px;align-items:center;margin-top:8px;font-family:monospace;font-size:1rem;background:var(--card);padding:8px 12px;border-radius:8px;border:1px solid var(--line)}

/* Floating WhatsApp button */
.wa-float{position:fixed;bottom:20px;right:20px;z-index:900;display:inline-flex;align-items:center;gap:10px;background:#25D366;color:#ffffff;padding:12px 18px;border-radius:999px;font-weight:700;font-size:.95rem;text-decoration:none;box-shadow:0 8px 24px rgba(37,211,102,.45);transition:transform .2s ease,box-shadow .2s ease;border:none}
.wa-float:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(37,211,102,.6);color:#ffffff}
.wa-float svg{width:24px;height:24px;fill:currentColor;flex-shrink:0}
.wa-float .wa-badge{background:rgba(0,0,0,.15);padding:2px 8px;border-radius:99px;font-size:.78rem;font-weight:600}
@media (max-width:480px){.wa-float{bottom:16px;right:16px;padding:10px 14px;font-size:.88rem}.wa-float .wa-badge{display:none}}

/* Floating / Header Tour button */
.tour-trigger-btn{display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;border:none;border-radius:999px;padding:10px 16px;font-weight:700;font-size:.9rem;cursor:pointer;box-shadow:0 6px 18px rgba(99,102,241,.35);transition:transform .2s,box-shadow .2s}
.tour-trigger-btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(99,102,241,.5)}
.tour-float{position:fixed;bottom:20px;left:20px;z-index:900}
@media (max-width:600px){.tour-float{bottom:74px;right:16px;left:auto}}

/* App Tour Modal */
.tour-modal-backdrop{position:fixed;inset:0;background:rgba(8,14,26,.78);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);z-index:2000;display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity .25s ease}
.tour-modal-backdrop.open{opacity:1;pointer-events:auto}
.tour-modal{background:var(--card);border:1.5px solid var(--line);border-radius:22px;max-width:560px;width:100%;max-height:92vh;display:flex;flex-direction:column;box-shadow:0 24px 60px rgba(0,0,0,.5);overflow:hidden;transform:scale(.95);transition:transform .25s ease}
.tour-modal-backdrop.open .tour-modal{transform:scale(1)}
.tour-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.tour-header h3{margin:0;font-size:1.15rem;display:flex;align-items:center;gap:8px}
.tour-close{background:none;border:none;color:var(--dim);font-size:1.4rem;cursor:pointer;padding:4px 8px;border-radius:8px;line-height:1}
.tour-close:hover{background:var(--field);color:var(--text)}
.tour-body{position:relative;overflow-y:auto;padding:20px;flex:1}
.tour-slide{display:none;animation:fadeIn .3s ease forwards}
.tour-slide.active{display:block}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.tour-preview-card{background:var(--field);border:1px solid var(--line);border-radius:16px;padding:18px;margin-bottom:16px;text-align:center}
.tour-graphic{height:150px;display:flex;align-items:center;justify-content:center;margin-bottom:12px;border-radius:12px;background:color-mix(in srgb,var(--card) 85%,transparent);position:relative;overflow:hidden}
.tour-slide h4{margin:0 0 8px;font-size:1.2rem;color:var(--text)}
.tour-slide p{margin:0 0 12px;color:var(--dim);font-size:.92rem;line-height:1.5}
.tour-feature-tags{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}
.tour-feature-tags span{font-size:.78rem;font-weight:700;padding:4px 10px;border-radius:99px;background:var(--card);border:1px solid var(--line);color:var(--dim)}
.tour-footer{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;border-top:1px solid var(--line);background:var(--card)}
.tour-dots{display:flex;gap:6px}
.tour-dot{width:8px;height:8px;border-radius:50%;background:var(--line);cursor:pointer;transition:all .2s ease}
.tour-dot.active{width:22px;border-radius:99px;background:var(--acc)}
.tour-nav-btns{display:flex;gap:8px}