:root{--bg:#f4f6fb;--card:#fff;--text:#1f2937;--muted:#6b7280;--line:#e5e7eb;--primary:#2563eb;--primary-d:#1d4ed8;--yt:#dc2626;--web:#0891b2;--ok:#15803d;--err:#b91c1c;--r:12px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif}
a{color:var(--primary)}
[hidden]{display:none!important}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}
.wrap{max-width:1080px;margin:0 auto;padding:0 16px}
main.wrap{padding-top:18px;padding-bottom:32px}

/* header / footer */
.site-header{background:#fff;border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:56px}
.brand{font-weight:700;font-size:1.15rem;color:var(--text);text-decoration:none;white-space:nowrap}
.nav{display:flex;gap:4px}
.nav a{padding:8px 12px;border-radius:8px;color:var(--text);text-decoration:none;font-size:.95rem;white-space:nowrap}
.nav a:hover{background:var(--bg)}
.nav a.on{background:#e8efff;color:var(--primary-d);font-weight:600}
.nav.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.site-footer{border-top:1px solid var(--line);background:#fff;padding:18px 0;text-align:center}
.site-footer{text-align:left}
.foot-cols{display:grid;grid-template-columns:1fr;gap:18px;margin:10px 0 14px}
@media(min-width:560px){.foot-cols{grid-template-columns:1fr 1fr}}
.foot-cols h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin:0 0 8px}
.foot-cols a{display:block;color:var(--text);text-decoration:none;font-size:.92rem;padding:3px 0}
.foot-cols a:hover{color:var(--primary);text-decoration:underline}
.copy{margin:6px 0 0;color:var(--muted);font-size:.85rem;text-align:center;border-top:1px solid var(--line);padding-top:12px}

/* ads */
.ad{text-align:center;margin:14px 0;overflow:hidden;max-width:100%;min-height:0}

/* intro */
.intro{margin:4px 0 16px}
.intro h1{font-size:1.5rem;margin-bottom:.2em}
.intro p{margin:0;color:var(--muted)}
.page-title{font-size:1.5rem}

/* cards */
.grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(min-width:760px){.grid{grid-template-columns:1fr 1fr;align-items:start}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:16px;box-shadow:0 1px 2px rgba(16,24,40,.04);margin-bottom:16px}
.grid .card{margin-bottom:0}
.card-youtube{border-top:4px solid var(--yt)}
.card-website{border-top:4px solid var(--web)}
.card-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:10px}
.card-head h2{font-size:1.05rem;margin:0}
.count{background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:0 10px;font-size:.85rem;font-weight:600;line-height:24px;min-width:28px;text-align:center}

/* forms */
label{display:block;font-size:.9rem;color:var(--muted);margin-bottom:6px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=date],select,textarea{width:100%;padding:10px 12px;border:1px solid #cfd6e4;border-radius:8px;font:inherit;background:#fff;color:var(--text)}
textarea{min-height:110px;resize:vertical;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9rem}
input:focus,select:focus,textarea:focus{outline:2px solid #bfd3ff;border-color:var(--primary)}
.row{display:flex;gap:8px}
.row input{flex:1;min-width:0}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;opacity:0}
.btn{display:inline-block;background:var(--primary);color:#fff;border:0;border-radius:8px;padding:10px 18px;font:inherit;font-weight:600;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn:hover{background:var(--primary-d)}
.btn:disabled{opacity:.6;cursor:wait}
.btn.sm{padding:5px 10px;font-size:.85rem}
.btn.danger{background:#dc2626}
.btn.danger:hover{background:#b91c1c}
.btn.gray{background:#e5e7eb;color:var(--text)}
.btn.gray:hover{background:#d1d5db}
.msg{margin:10px 0 0;font-size:.92rem}
.msg.ok,.alert.ok{color:var(--ok)}
.msg.err,.alert.err{color:var(--err)}
.alert{padding:10px 14px;border-radius:8px;margin-bottom:14px;border:1px solid currentColor;background:#fff}
.alert.warn{color:#92400e;background:#fffbeb;border-color:#fcd34d}

/* lists */
.url-list{list-style:none;margin:14px 0 0;padding:0;border-top:1px solid var(--line)}
.url-list li{display:flex;justify-content:space-between;gap:10px;padding:9px 0;border-bottom:1px solid var(--line);font-size:.93rem}
.url-list a{word-break:break-all;min-width:0}
.url-list time{color:var(--muted);font-size:.8rem;white-space:nowrap}
.empty{color:var(--muted);margin:14px 0 0;font-size:.93rem}
.more{display:inline-block;margin-top:12px;font-size:.93rem}
.date-list{list-style:none;margin:0;padding:0}
.date-list li{display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;padding:11px 0;border-bottom:1px solid var(--line)}
.date-list li:last-child{border-bottom:0}
.date-list a{font-weight:600;margin-right:auto}
.badge{display:inline-block;font-size:.78rem;border-radius:999px;padding:1px 9px;font-weight:600}
.badge.yt{background:#fee2e2;color:#991b1b}
.badge.web{background:#cffafe;color:#155e75}
.section-title{font-size:1.1rem;margin:22px 0 10px}
.daynav{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin:0 0 14px}
.inline-form{display:flex;gap:8px;max-width:360px}
.pager{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:14px;font-size:.92rem}
.pager span{color:var(--muted)}
.pager .cur{color:var(--text)}

/* content pages */
.prose h1{font-size:1.6rem}
.prose h2{font-size:1.2rem;margin-top:1.3em}
.prose p{margin:0 0 1em}

/* admin */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:16px}
@media(min-width:760px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px}
.stat b{display:block;font-size:1.6rem;line-height:1.2}
.stat span{color:var(--muted);font-size:.85rem}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:9px 10px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#f9fafb;font-size:.8rem;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);white-space:nowrap}
td.url{word-break:break-all;min-width:220px}
.filters{display:grid;grid-template-columns:1fr;gap:10px;margin-bottom:14px}
@media(min-width:760px){.filters{grid-template-columns:150px 170px 1fr auto;align-items:end}}
.field{margin-bottom:14px}
.field small{display:block;color:var(--muted);margin-top:4px}
.fieldset-title{font-size:1.05rem;margin:0 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
.checks{display:flex;align-items:center;gap:8px}
.checks input{width:auto}
.checks label{margin:0;color:var(--text)}
.actions{display:flex;gap:6px;flex-wrap:wrap}
.login{max-width:380px;margin:8vh auto 0}
.cols{display:grid;grid-template-columns:1fr;gap:0 16px}
@media(min-width:760px){.cols{grid-template-columns:1fr 1fr}}

/* header: wrapping nav + Tips dropdown */
.site-header .wrap{flex-wrap:wrap}
.main-nav{flex-wrap:wrap;align-items:center}
.dd{position:relative}
.dd summary{list-style:none;cursor:pointer;padding:8px 12px;border-radius:8px;font-size:.95rem;white-space:nowrap;user-select:none}
.dd summary::-webkit-details-marker{display:none}
.dd summary::after{content:" \25BE";font-size:.8em}
.dd summary:hover{background:var(--bg)}
.dd.on summary{background:#e8efff;color:var(--primary-d);font-weight:600}
.dd-panel{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:10px;padding:6px;box-shadow:0 8px 24px rgba(16,24,40,.12);margin-top:4px;min-width:260px;max-height:70vh;overflow:auto}
.dd-panel a{padding:8px 10px;border-radius:6px;white-space:normal}
.dd-panel a.all{font-weight:700;border-bottom:1px solid var(--line);border-radius:6px 6px 0 0;margin-bottom:4px}
@media(min-width:760px){.dd-panel{position:absolute;left:0;top:100%;z-index:20}}
@media(max-width:759px){.main-nav{width:100%;padding-bottom:8px}.dd{width:100%}.dd-panel{box-shadow:none}}

/* tips hub and related */
.tip-grid{display:grid;grid-template-columns:1fr;gap:14px;margin-bottom:16px}
@media(min-width:620px){.tip-grid{grid-template-columns:1fr 1fr}}
@media(min-width:960px){.tip-grid{grid-template-columns:repeat(3,1fr)}}
.tip-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px;text-decoration:none;color:var(--text);transition:box-shadow .15s,border-color .15s}
.tip-card:hover{border-color:var(--primary);box-shadow:0 4px 14px rgba(37,99,235,.12)}
.tip-card h3{font-size:1.02rem;margin:0 0 6px;color:var(--primary-d)}
.tip-card p{margin:0 0 10px;color:var(--muted);font-size:.92rem;flex:1}
.tip-card span{font-size:.88rem;font-weight:600;color:var(--primary)}
.page-nav{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:18px 0 0;padding-top:14px;border-top:1px solid var(--line);font-size:.95rem}
.related-links{list-style:none;margin:0;padding:0}
.related-links li{padding:8px 0;border-bottom:1px solid var(--line)}
.related-links li:last-child{border-bottom:0}
.prose ul,.prose ol{margin:0 0 1em;padding-left:1.3em}
.prose li{margin-bottom:.35em}
.cta{background:#eef4ff;border-color:#cfe0ff}