/*
Theme Name: Fishkeeping.io
Theme URI: https://fishkeeping.io/
Author: Fishkeeping.io
Author URI: https://fishkeeping.io/
Description: A clean, fast, ad-ready blog theme for aquarium and fishkeeping sites. Underwater hero, category filtering, article table of contents, and AdSense-ready widget slots.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.8
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: home-aquarist
Tags: blog, one-column, two-columns, custom-menu, custom-logo, featured-images, threaded-comments, translation-ready, block-styles, wide-blocks
*/

/* ================= DESIGN TOKENS ================= */
:root{
  --deep:#06283D;        /* deep ocean */
  --mid:#0B4F6C;         /* mid water */
  --aqua:#1FA6B8;        /* aqua */
  --sky:#47B5FF;         /* light water */
  --foam:#EAF6F8;        /* page background */
  --surface:#FFFFFF;
  --ink:#0A2A38;
  --ink-soft:#3E5A64;
  --faint:#5E7781;       /* small mono labels: 4.73:1 on white, WCAG AA */
  --coral:#FF6B4A;       /* fish-orange accent, decorative only */
  --coral-deep:#D8431F;
  --coral-cta:#CE3F1D;   /* coral that carries white text: 4.82:1, WCAG AA */
  --kelp:#1F8F5F;
  --line:#D3E2E5;
  --line-strong:#AFC8CD;
  --radius:14px;
  --maxw:1180px;
  --reading:66ch;
  --shadow-sm:0 2px 6px rgba(6,40,61,.06),0 12px 32px rgba(6,40,61,.08);
  --shadow-md:0 18px 48px rgba(6,40,61,.18);
  --font-body:'Inter',system-ui,sans-serif;
  --font-head:'Bricolage Grotesque','Inter',system-ui,sans-serif;
  --font-mono:ui-monospace,'SF Mono',Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
[id]{scroll-margin-top:96px}
body{font-family:var(--font-body);font-size:17px;line-height:1.68;color:var(--ink);background:var(--foam);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration:none}
h1,h2,h3,h4{font-family:var(--font-head);font-weight:700;line-height:1.08;letter-spacing:-.02em}
:focus-visible{outline:3px solid var(--coral-deep);outline-offset:3px;border-radius:4px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 28px}
.skip-link{position:absolute;left:14px;top:-60px;z-index:300;background:var(--deep);color:#fff;padding:10px 16px;border-radius:8px;transition:top .2s}
.skip-link:focus{top:14px;color:#fff}
.kicker{font-family:var(--font-mono);font-size:.7rem;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--coral-deep)}
.tag{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:.64rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--mid);background:#E1F1F4;padding:5px 11px;border-radius:99px}
/* water parameter chips */
.readout{display:inline-flex;flex-wrap:wrap;gap:8px;font-family:var(--font-mono)}
.r-chip{font-size:.68rem;letter-spacing:.04em;color:var(--ink-soft);border:1px solid var(--line-strong);border-radius:99px;padding:6px 12px;background:var(--surface)}
.r-chip b{color:var(--ink);font-weight:700}
.r-chip.ok{border-color:#BFE3D2}
.r-chip.ok b{color:var(--kelp)}
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:.94rem;padding:14px 26px;border-radius:99px;border:1px solid transparent;cursor:pointer;transition:transform .15s,background .15s,border-color .15s}
.btn-coral{background:var(--coral-cta);color:#fff;box-shadow:0 8px 22px rgba(255,107,74,.35)}
.btn-coral:hover{background:#B8370F;color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--ink)}
.btn-light{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.35);backdrop-filter:blur(4px)}
.btn-light:hover{background:rgba(255,255,255,.24);color:#fff}
.progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--aqua),var(--coral));z-index:250}
/* ================= HEADER ================= */
.site-header{position:sticky;top:0;z-index:200;background:rgba(6,40,61,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.brand{display:inline-flex;align-items:center;gap:11px;font-family:var(--font-head);font-size:1.3rem;font-weight:800;color:#fff;letter-spacing:-.02em}
.brand small{display:block;font-family:var(--font-mono);font-weight:500;font-size:.58rem;letter-spacing:.22em;text-transform:uppercase;color:var(--sky);margin-top:2px}
.site-header .nav-links{display:flex;align-items:center;gap:2px;list-style:none}
.site-header .nav-links a{position:relative;color:#D7E9EF;font-weight:500;font-size:.94rem;padding:8px 13px;border-radius:8px}
.site-header .nav-links a:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav-tools{display:flex;align-items:center;gap:10px}
.search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:99px;padding:9px 15px;transition:border-color .15s}
.search:focus-within{border-color:var(--sky)}
.search svg{flex:none;color:#9FC3CF}
.search input{border:0;outline:0;background:transparent;font-size:.88rem;color:#fff;width:150px}
.search input::placeholder{color:#9FC3CF}
.hamburger{display:none;width:44px;height:44px;border:1px solid rgba(255,255,255,.25);background:transparent;border-radius:10px;cursor:pointer;align-items:center;justify-content:center}
.hamburger span,.hamburger span::before,.hamburger span::after{content:"";display:block;width:20px;height:2px;background:#fff;border-radius:2px;transition:transform .25s,opacity .2s}
.hamburger span::before{transform:translateY(-6px)}
.hamburger span::after{transform:translateY(4px)}
.hamburger[aria-expanded="true"] span{background:transparent}
.hamburger[aria-expanded="true"] span::before{transform:rotate(45deg)}
.hamburger[aria-expanded="true"] span::after{transform:rotate(-45deg) translateY(-1px)}
/* ---- Primary nav dropdown (Tools) ---- */
.site-header .nav-links li{position:relative}
.site-header .nav-links .menu-item-has-children>a::after{content:"";display:inline-block;margin-left:6px;vertical-align:middle;border:4px solid transparent;border-top-color:currentColor;border-bottom:0;transition:transform .2s}
.site-header .nav-links li:hover>.menu-item-has-children>a::after,.site-header .nav-links .menu-item-has-children:hover>a::after{transform:rotate(180deg)}
.site-header .nav-links .sub-menu{position:absolute;top:100%;left:0;min-width:220px;margin:0;padding:6px;list-style:none;background:var(--deep,#06283D);border:1px solid rgba(255,255,255,.12);border-radius:10px;box-shadow:var(--shadow-md,0 12px 30px rgba(0,0,0,.4));display:none;opacity:0;transition:opacity .15s;z-index:210}
.site-header .nav-links li:hover>.sub-menu,.site-header .nav-links li:focus-within>.sub-menu{display:block;opacity:1}
.site-header .nav-links .sub-menu li{width:100%}
.site-header .nav-links .sub-menu a{display:block;white-space:nowrap;padding:9px 12px;font-size:.9rem;border-radius:7px}
/* ================= HERO (underwater scene) ================= */
.hero{position:relative;background:linear-gradient(180deg,#06283D 0%,#0B4F6C 55%,#11698E 100%);color:#fff;overflow:hidden;padding:76px 0 0}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(ellipse 60% 40% at 20% -10%,rgba(71,181,255,.28),transparent 60%),
  radial-gradient(ellipse 50% 35% at 85% 0%,rgba(31,166,184,.25),transparent 60%);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:1.2fr .9fr;gap:48px;align-items:center;padding-bottom:90px}
.niche-badge{display:inline-flex;align-items:center;gap:9px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:99px;padding:8px 16px;font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:#CDEBFF;margin-bottom:22px}
.niche-badge .dot{width:8px;height:8px;border-radius:50%;background:var(--coral);box-shadow:0 0 0 4px rgba(255,107,74,.25)}
.hero h1{font-size:clamp(2.6rem,6vw,4.3rem);line-height:1.0;letter-spacing:-.03em;color:#fff}
.hero h1 em{font-style:normal;color:var(--sky)}
.hero .lead{font-size:1.16rem;color:#BFDCE8;max-width:48ch;margin-top:20px}
.hero .readout{margin-top:22px}
.hero .r-chip{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.28);color:#CFE7EF}
.hero .r-chip b{color:#fff}
.hero .r-chip.ok b{color:#7BE3B0}
.hero-search{display:flex;gap:10px;margin-top:26px;flex-wrap:wrap}
.hero-search .search{flex:1 1 260px;background:rgba(255,255,255,.12)}
.hero-search .search input{width:100%}
.hero-stats{display:flex;gap:32px;margin-top:34px;flex-wrap:wrap}
.stat b{display:block;font-family:var(--font-head);font-size:1.7rem;font-weight:800;color:#fff;letter-spacing:-.02em}
.stat span{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:#8FB9C9}
/* porthole image */
.porthole{position:relative;justify-self:center}
.porthole .ring{width:min(380px,80vw);aspect-ratio:1;border-radius:50%;padding:12px;background:linear-gradient(145deg,rgba(255,255,255,.35),rgba(255,255,255,.06));box-shadow:var(--shadow-md)}
.porthole img{width:100%;height:100%;border-radius:50%;object-fit:cover;border:4px solid rgba(255,255,255,.5)}
.porthole .float-chip{position:absolute;background:#fff;color:var(--ink);border-radius:12px;box-shadow:var(--shadow-md);padding:10px 14px;font-size:.8rem;font-weight:600;display:flex;align-items:center;gap:8px;animation:bob 5s ease-in-out infinite}
.porthole .float-chip.a{top:8%;left:-6%}
.porthole .float-chip.b{bottom:10%;right:-4%;animation-delay:-2.5s}
.float-chip .ico{width:30px;height:30px;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;background:#FFE9E2;color:var(--coral-deep);flex:none}
.float-chip.b .ico{background:#DFF3EA;color:var(--kelp)}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
/* ad slots (replace with AdSense units after approval) */
.ad-slot{background:rgba(6,40,61,.04);border:1px dashed var(--line-strong);border-radius:12px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;color:var(--faint);font-family:var(--font-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;text-align:center}
.ad-slot small{font-size:.62rem;letter-spacing:.03em;text-transform:none;font-family:var(--font-body)}
.ad-leaderboard{max-width:728px;min-height:90px;margin:34px auto 0}
.ad-infeed{min-height:130px;grid-column:1/-1}
.ad-inarticle{min-height:100px;margin:30px 0}
/* swimming fish in hero */
.swimmer{position:absolute;pointer-events:none;opacity:.55;animation:swim linear infinite}
@keyframes swim{0%{transform:translateX(-12vw) translateY(0)}50%{transform:translateX(50vw) translateY(-18px)}100%{transform:translateX(112vw) translateY(0)}}
/* dates on cards */
.card .pub-date{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.06em;color:var(--faint);text-transform:uppercase;display:block;margin-bottom:8px}
/* pagination */
.pagination{display:flex;gap:8px;justify-content:center;margin-top:38px}
.pagination a{min-width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-strong);border-radius:99px;font-size:.9rem;font-weight:600;color:var(--ink);padding:0 14px;background:var(--surface);transition:all .15s}
.pagination a:hover{border-color:var(--mid)}
.pagination a.current{background:var(--mid);color:#fff;border-color:var(--mid)}
/* author box */
.author-box{max-width:var(--reading);margin:10px auto 40px;background:var(--foam);border:1px solid var(--line);border-radius:var(--radius);padding:24px;display:flex;gap:16px}
.author-box .avatar{width:56px;height:56px;border-radius:50%;background:var(--mid);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;flex:none}
.author-box b{font-family:var(--font-head);font-size:1.05rem}
.author-box p{font-size:.9rem;color:var(--ink-soft);margin-top:6px}
.author-photo-link{flex:none;line-height:0}
.author-box .author-photo{width:72px;height:72px;border-radius:50%;object-fit:cover;flex:none;background:var(--mid)}
.author-box b a{color:inherit;text-decoration:none}
.author-box b a:hover{text-decoration:underline}
.author-credential{font-size:.9rem;color:var(--ink-soft);margin-top:6px}
.author-more{display:inline-block;margin-top:10px;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;text-transform:uppercase;color:var(--mid);text-decoration:none}
.author-more:hover{text-decoration:underline}
.byline strong a{color:inherit;text-decoration:none}
.byline strong a:hover{text-decoration:underline}
.updated-note{font-size:.82rem;color:var(--faint);margin-top:26px;padding-top:14px;border-top:1px solid var(--line)}
/* light rays in hero */
.rays{position:absolute;inset:0;pointer-events:none;overflow:hidden;opacity:.5}
.ray{position:absolute;top:-20%;width:120px;height:150%;background:linear-gradient(180deg,rgba(173,222,255,.28),transparent 70%);transform:skewX(-18deg);filter:blur(6px);animation:shimmer 9s ease-in-out infinite}
.ray.r2{width:70px;animation-delay:-3s;opacity:.7}
.ray.r3{width:160px;animation-delay:-6s;opacity:.5}
@keyframes shimmer{0%,100%{opacity:.25}50%{opacity:.75}}
/* kelp silhouettes at the waterline */
.kelp-band{position:absolute;left:0;right:0;bottom:56px;height:120px;pointer-events:none;overflow:hidden}
.kelp{position:absolute;bottom:0;transform-origin:bottom center;animation:sway 6s ease-in-out infinite;opacity:.4}
@keyframes sway{0%,100%{transform:rotate(-4deg)}50%{transform:rotate(4deg)}}
/* scroll-reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
/* card category accent + image glaze */
.card{border-top:3px solid transparent}
.card[data-cat="start"]{border-top-color:#47B5FF}
.card[data-cat="water"]{border-top-color:#1FA6B8}
.card[data-cat="fish"]{border-top-color:#FF6B4A}
.card[data-cat="plants"]{border-top-color:#1F8F5F}
.card[data-cat="algae"]{border-top-color:#E3B341}
.card .media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(6,40,61,.25));opacity:0;transition:opacity .3s}
.card:hover .media::after{opacity:1}
/* porthole glow */
.porthole .ring{position:relative}
.porthole .ring::before{content:"";position:absolute;inset:-14px;border-radius:50%;background:radial-gradient(circle,rgba(71,181,255,.35),transparent 70%);z-index:-1;animation:glow 5s ease-in-out infinite}
@keyframes glow{0%,100%{opacity:.5;transform:scale(1)}50%{opacity:1;transform:scale(1.05)}}
/* category tile fill on hover */
.cat-tile{position:relative;overflow:hidden}
.cat-tile::before{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(31,166,184,.08),rgba(71,181,255,.08));transform:translateX(-101%);transition:transform .3s ease}
.cat-tile:hover::before{transform:none}
/* newsletter bubbles */
.newsletter .bubbles{opacity:.6}
/* footer wave divider */
.wave-footer{display:block;width:100%;height:60px;margin-bottom:-1px}
/* bubbles */
.bubbles{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.bubble{position:absolute;bottom:-40px;border-radius:50%;background:radial-gradient(circle at 35% 30%,rgba(255,255,255,.55),rgba(255,255,255,.08) 60%);animation:rise linear infinite}
@keyframes rise{0%{transform:translateY(0);opacity:0}12%{opacity:.9}100%{transform:translateY(-110vh);opacity:0}}
/* wave divider */
.wave{display:block;width:100%;height:70px;margin-top:-1px}
.wave.flip{transform:scaleY(-1)}
/* ================= NICHE STRIP ================= */
.niche-strip{background:var(--surface);border-bottom:1px solid var(--line)}
.niche-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:26px 0}
.niche-item{display:flex;align-items:center;gap:13px;padding:10px 12px;border-radius:12px;transition:background .15s}
.niche-item:hover{background:var(--foam)}
.niche-item .ico{width:46px;height:46px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;flex:none;font-size:1.35rem}
.ni-1 .ico{background:#FFE9E2}.ni-2 .ico{background:#DFF0FB}.ni-3 .ico{background:#DFF3EA}.ni-4 .ico{background:#FDF3D8}
.niche-item b{display:block;font-family:var(--font-head);font-size:1rem;font-weight:700}
.niche-item span{font-size:.82rem;color:var(--faint)}
/* ================= SECTIONS ================= */
.section{padding:84px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding-bottom:18px;margin-bottom:38px;border-bottom:2px solid var(--ink)}
.section-head h2{font-size:clamp(1.7rem,3.4vw,2.4rem);margin-top:12px}
.section-head p{color:var(--ink-soft);margin-top:8px;max-width:60ch}
.st-index{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.14em;color:var(--faint);text-transform:uppercase;white-space:nowrap}
/* ================= FEATURED ================= */
.featured{display:grid;grid-template-columns:1.1fr 1fr;gap:0;background:var(--surface);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--line)}
.featured .f-media{position:relative}
.featured .f-media img{width:100%;height:100%;object-fit:cover;min-height:320px}
.featured .f-media .flag{position:absolute;top:16px;left:16px;background:var(--coral-cta);color:#fff;font-family:var(--font-mono);font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;padding:7px 13px;border-radius:99px}
.featured .f-body{padding:40px 42px;display:flex;flex-direction:column;justify-content:center}
.featured h3{font-size:clamp(1.5rem,2.6vw,2.1rem);margin:14px 0 12px}
.featured h3 a{color:var(--ink)}
.featured h3 a:hover{color:var(--coral-deep)}
.featured p{color:var(--ink-soft);margin-bottom:20px}
.byline{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.04em;color:var(--faint);text-transform:uppercase}
.byline .avatar{width:32px;height:32px;border-radius:50%;background:var(--mid);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-body);font-weight:700;font-size:.72rem;flex:none}
.byline strong{color:var(--ink);font-weight:600}
.dsep{width:4px;height:4px;border-radius:50%;background:var(--line-strong);display:inline-block}
/* ================= CHIPS + CARD GRID ================= */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:34px}
.chip{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;padding:9px 16px;border:1px solid var(--line-strong);background:var(--surface);color:var(--ink);border-radius:99px;cursor:pointer;transition:all .15s}
.chip:hover{border-color:var(--mid)}
.chip.active{background:var(--mid);color:#fff;border-color:var(--mid)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md)}
.card .media{position:relative;overflow:hidden}
.card .media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s cubic-bezier(.2,.7,.3,1)}
.card:hover .media img{transform:scale(1.05)}
.card .num{position:absolute;top:12px;left:12px;font-family:var(--font-mono);font-size:.62rem;letter-spacing:.1em;color:#fff;background:rgba(6,40,61,.85);padding:5px 9px;border-radius:99px}
.card .c-inner{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.card .c-tag{margin-bottom:11px;align-self:flex-start}
.card h3{font-size:1.22rem;line-height:1.2;margin-bottom:9px}
.card h3 a{color:var(--ink)}
.card h3 a:hover{color:var(--coral-deep)}
.card .excerpt{color:var(--ink-soft);font-size:.93rem;margin-bottom:14px;flex:1}
.card .card-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;padding-top:13px;border-top:1px solid var(--line)}
.card .read-time{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.06em;color:var(--faint);text-transform:uppercase}
.no-results{display:none;color:var(--ink-soft);padding:20px 0;font-style:italic}
/* ================= CATEGORIES ================= */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cat-tile{display:flex;align-items:center;gap:16px;padding:24px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);transition:transform .18s,box-shadow .18s,border-color .18s}
.cat-tile:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:var(--aqua)}
.cat-ico{width:52px;height:52px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;font-size:1.5rem;flex:none}
.cg-1{background:#DFF0FB}.cg-2{background:#E1F1F4}.cg-3{background:#FFE9E2}.cg-4{background:#DFF3EA}.cg-5{background:#FDF3D8}.cg-6{background:#ECE8FB}
.cat-name{font-family:var(--font-head);font-weight:700;font-size:1.14rem;display:block}
.cat-count{font-family:var(--font-mono);font-size:.66rem;color:var(--faint);letter-spacing:.08em;text-transform:uppercase}
.cat-tile .arrow{margin-left:auto;color:var(--faint);transition:transform .2s,color .2s}
.cat-tile:hover .arrow{transform:translateX(4px);color:var(--coral-deep)}
/* ================= TOPICS HUB ================= */
.topics-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:8px}
.topic-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:transform .18s,box-shadow .18s,border-color .18s}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);border-color:var(--aqua)}
.topic-card-head{display:flex;align-items:center;gap:14px;margin-bottom:2px}
.topic-card-head .cat-ico{width:48px;height:48px;border-radius:14px;background:#E1F1F4}
.topic-card h3{font-size:1.3rem;margin:0}
.topic-card h3 a{color:var(--ink)}
.topic-card h3 a:hover{color:var(--coral-deep)}
.topic-count{font-family:var(--font-mono);font-size:.66rem;color:var(--faint);letter-spacing:.08em;text-transform:uppercase;display:block;margin-top:3px}
.topic-desc{color:var(--ink-soft);font-size:.95rem;margin:12px 0 16px}
.topic-posts{list-style:none;margin:0 0 18px;padding:0;border-top:1px solid var(--line)}
.topic-posts li{border-bottom:1px solid var(--line)}
.topic-posts a{display:flex;justify-content:space-between;gap:14px;align-items:baseline;padding:11px 0;color:var(--ink);font-weight:600;font-size:.95rem}
.topic-posts a:hover{color:var(--coral-deep)}
.topic-posts .tp-date{font-family:var(--font-mono);font-size:.64rem;color:var(--faint);letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;font-weight:500}
.topic-more{margin-top:auto;font-family:var(--font-mono);font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--mid);display:inline-flex;align-items:center;gap:7px}
.topic-more:hover{color:var(--coral-deep)}
.topic-more .arrow{transition:transform .2s}
.topic-card:hover .topic-more .arrow{transform:translateX(4px)}
@media (max-width:600px){.topics-grid{grid-template-columns:1fr}}
/* ================= POST ================= */
.post-wrap{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.breadcrumb{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);padding:24px 0 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb a{color:var(--ink-soft)}
.breadcrumb a:hover{color:var(--coral-deep)}
.csep{color:var(--line-strong)}
.post-header{max-width:var(--reading);margin:26px auto 0}
.post-header h1{font-size:clamp(2rem,4.4vw,3rem);line-height:1.06;margin:14px 0 18px;letter-spacing:-.03em}
.post-header .readout{margin-top:18px}
.post-featured{max-width:940px;margin:30px auto 0}
.post-featured img{width:100%;border-radius:var(--radius)}
.post-featured .cap{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--faint);padding-top:10px;text-align:center}
.post-layout{display:grid;grid-template-columns:220px minmax(0,var(--reading));gap:56px;justify-content:center;padding:44px 0 40px}
.toc{position:sticky;top:100px;align-self:start}
.toc h2{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);font-weight:600;margin-bottom:14px}
.toc ol{list-style:none;display:flex;flex-direction:column;gap:2px}
.toc a{display:block;color:var(--ink-soft);font-size:.88rem;padding:6px 14px;border-left:2px solid var(--line);line-height:1.35}
.toc a:hover{color:var(--coral-deep);border-color:var(--coral)}
.toc a.sub{padding-left:26px;font-size:.83rem}
.toc a.active{color:var(--ink);border-color:var(--coral);font-weight:600}
.post-body>p,.post-body>ul,.post-body>ol{margin-bottom:22px;color:#21414d}
.post-body h2{font-size:1.8rem;margin:44px 0 16px}
.post-body h3{font-size:1.28rem;margin:30px 0 10px}
.post-body ul,.post-body ol{padding-left:24px}
.post-body li{margin-bottom:9px}
.tip{background:#EAF6F8;border-left:4px solid var(--aqua);border-radius:0 10px 10px 0;padding:18px 22px;margin:26px 0}
.tip strong{color:var(--mid)}
a.inline{color:var(--coral-deep);text-decoration:underline;text-underline-offset:3px}
.related{max-width:940px;margin:0 auto;padding-bottom:50px}
.related h2{font-size:1.5rem;margin-bottom:22px;border-bottom:1px solid var(--line-strong);padding-bottom:12px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.related-card{background:var(--foam);border:1px solid var(--line);border-radius:12px;padding:20px}
.related-card .tag{margin-bottom:12px}
.related-card h3{font-size:1.05rem;line-height:1.26}
.related-card h3 a:hover{color:var(--coral-deep)}
/* ================= NEWSLETTER ================= */
.newsletter{position:relative;background:linear-gradient(160deg,var(--deep),var(--mid));color:#D9E8EE;padding:66px 44px;border-radius:20px;overflow:hidden}
.newsletter::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 50% 60% at 85% 20%,rgba(71,181,255,.22),transparent 65%);pointer-events:none}
.newsletter .kicker{color:var(--sky)}
.newsletter h2{color:#fff;font-size:clamp(1.7rem,3vw,2.3rem);margin:12px 0}
.newsletter p{color:#A5C4D0;max-width:50ch;margin:0 auto 28px}
.nl-inner{max-width:560px;margin:0 auto;text-align:center;position:relative;z-index:1}
.nl-form{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.nl-form input[type="email"]{flex:1 1 240px;padding:14px 20px;border-radius:99px;border:1px solid #2E5B6E;background:#0A3A50;color:#fff;font-size:.95rem;outline:none}
.nl-form input::placeholder{color:#7FA3B2}
.nl-form input[type="email"]:focus{border-color:var(--sky)}
.nl-error{color:#FFB9A3;font-size:.85rem;margin-top:12px;min-height:1em}
.nl-success{color:#7BE3B0;font-weight:600;margin-top:10px}
/* ================= ABOUT ================= */
.about{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}
.about img{border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.about h2{font-size:clamp(1.7rem,3vw,2.3rem);margin:12px 0 16px}
.about p{color:var(--ink-soft);margin-bottom:16px}
/* ================= FOOTER ================= */
.site-footer{background:var(--deep);color:#BCD2D9;padding:70px 0 30px}
.site-footer .brand{color:#fff}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{color:#8FAEBB;font-size:.92rem;margin-top:14px;max-width:34ch}
.footer-col h3{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:#7FA3B2;margin-bottom:16px;font-weight:600}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#BCD2D9;font-size:.92rem}
.footer-col a:hover{color:var(--sky)}
.socials{display:flex;gap:10px;margin-top:18px}
.socials a{width:40px;height:40px;border-radius:10px;border:1px solid #1E4A61;display:inline-flex;align-items:center;justify-content:center;color:#BCD2D9;transition:all .15s}
.socials a:hover{border-color:var(--sky);color:var(--sky)}
.footer-bottom{border-top:1px solid #14415A;margin-top:44px;padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:#6E93A3;font-family:var(--font-mono);font-size:.72rem;letter-spacing:.06em;text-transform:uppercase}
.to-top{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;background:var(--coral);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .25s;z-index:150;box-shadow:var(--shadow-md)}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
/* ================= RESPONSIVE ================= */
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:44px;padding-bottom:70px}
  .porthole .float-chip.a{left:0}.porthole .float-chip.b{right:0}
  .niche-inner{grid-template-columns:repeat(2,1fr)}
  .featured{grid-template-columns:1fr}
  .grid,.cat-grid,.related-grid{grid-template-columns:repeat(2,1fr)}
  .about,.footer-grid{grid-template-columns:1fr;gap:32px}
  .post-layout{grid-template-columns:1fr;gap:28px}
  .toc{position:static;border:1px solid var(--line);padding:20px;border-radius:12px;background:var(--foam)}
}
@media (max-width:640px){
  body{font-size:16px}
  .section{padding:60px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:6px}
  .grid,.cat-grid,.related-grid,.niche-inner{grid-template-columns:1fr}
  .nav .search{display:none}
  .hamburger{display:inline-flex}
  .site-header .nav-links{position:absolute;left:0;right:0;top:72px;flex-direction:column;align-items:stretch;gap:0;background:var(--deep);padding:8px 18px 16px;box-shadow:var(--shadow-md);display:none}
  .site-header .nav-links.open{display:flex}
  .site-header .nav-links a{padding:14px 8px;border-bottom:1px solid rgba(255,255,255,.08);border-radius:0}
  .site-header .nav-links .sub-menu{position:static;display:block;opacity:1;min-width:0;margin:0;padding:0 0 0 14px;background:transparent;border:0;box-shadow:none}
  .site-header .nav-links .sub-menu a{padding:12px 8px;font-size:.9rem;color:#B9D4DD}
  .site-header .nav-links .menu-item-has-children>a::after{display:none}
  .footer-bottom{flex-direction:column}
  .featured .f-body{padding:28px 24px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}

/* ================= WORDPRESS CORE ================= */
.screen-reader-text{border:0;clip:rect(1px,1px,1px,1px);clip-path:inset(50%);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute!important;width:1px;word-wrap:normal!important}
.screen-reader-text:focus{background:#fff;clip:auto!important;clip-path:none;color:var(--deep);display:block;font-size:.9rem;height:auto;left:14px;line-height:normal;padding:14px 20px;text-decoration:none;top:14px;width:auto;z-index:100000;border-radius:8px}
.admin-bar .site-header{top:32px}
@media (max-width:782px){.admin-bar .site-header{top:46px}}
.custom-logo{max-height:44px;width:auto}
.alignleft{float:left;margin:6px 26px 18px 0}
.alignright{float:right;margin:6px 0 18px 26px}
.aligncenter{margin-left:auto;margin-right:auto;display:block}
.alignwide{width:min(100vw - 56px,1100px);max-width:none;margin-left:50%;transform:translateX(-50%)}
.alignfull{width:100vw;max-width:none;margin-left:50%;transform:translateX(-50%)}
.post-body img,.post-body iframe,.post-body video{border-radius:var(--radius)}
.post-body figure{margin:26px 0}
.post-body figcaption,.wp-caption-text{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.08em;text-transform:uppercase;color:var(--faint);padding-top:9px;text-align:center}
.post-body blockquote{background:#EAF6F8;border-left:4px solid var(--aqua);border-radius:0 10px 10px 0;padding:18px 22px;margin:26px 0;font-size:1.04rem}
.post-body blockquote p:last-child{margin-bottom:0}
.post-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:.94rem}
.post-body th,.post-body td{border:1px solid var(--line);padding:11px 14px;text-align:left}
.post-body th{background:var(--foam);font-family:var(--font-head);font-weight:700}
.post-body pre{background:var(--deep);color:#D7E9EF;padding:20px;border-radius:var(--radius);overflow:auto;font-family:var(--font-mono);font-size:.86rem;margin:26px 0}
.post-body code{font-family:var(--font-mono);font-size:.88em;background:#E1F1F4;padding:2px 6px;border-radius:5px}
.post-body pre code{background:transparent;padding:0}
.post-body hr{border:0;border-top:1px solid var(--line);margin:36px 0}
.post-body a{color:var(--coral-deep);text-decoration:underline;text-underline-offset:3px}
.post-body a:hover{color:var(--coral)}
.sticky .card{border-top-color:var(--coral)}
.card{border-top-color:var(--aqua)}
.card[data-cat="getting-started"]{border-top-color:#47B5FF}
.card[data-cat="water-quality"]{border-top-color:#1FA6B8}
.card[data-cat="fish-care"]{border-top-color:#FF6B4A}
.card[data-cat="plants"],.card[data-cat="plants-aquascaping"]{border-top-color:#1F8F5F}
.card[data-cat="algae"],.card[data-cat="algae-problems"]{border-top-color:#E3B341}
.card[data-cat="equipment"]{border-top-color:#8B7BD8}
.page-hero{background:linear-gradient(160deg,var(--deep),var(--mid));color:#fff;padding:64px 0 54px;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 50% 60% at 85% 10%,rgba(71,181,255,.22),transparent 65%);pointer-events:none}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{font-size:clamp(1.9rem,4vw,2.9rem);color:#fff;margin-top:12px}
.page-hero p{color:#A5C4D0;margin-top:12px;max-width:60ch}
.page-hero .kicker{color:var(--sky)}
.page-hero .breadcrumb{color:#8FB9C9;padding-top:0;margin-bottom:6px}
.page-hero .breadcrumb a{color:#BFDCE8}
.page-hero .breadcrumb a:hover{color:#fff}
.page-shell{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.page-shell .post-body{max-width:var(--reading);margin:0 auto;padding:52px 0}
.with-sidebar{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}
.sidebar{position:sticky;top:100px;display:flex;flex-direction:column;gap:24px}
.widget{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.widget-title{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--faint);font-weight:600;margin-bottom:14px}
.widget ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.widget a{color:var(--ink-soft);font-size:.93rem}
.widget a:hover{color:var(--coral-deep)}
@media (max-width:980px){.with-sidebar{grid-template-columns:1fr;gap:30px}.sidebar{position:static}}
.comments-area{max-width:var(--reading);margin:0 auto;padding:0 0 50px}
.comments-area h2{font-size:1.5rem;margin-bottom:22px;border-bottom:1px solid var(--line-strong);padding-bottom:12px}
.comment-list{list-style:none}
.comment-list li{margin-bottom:20px}
.comment-body{background:var(--foam);border:1px solid var(--line);border-radius:12px;padding:20px}
.comment-list .children{list-style:none;margin-left:26px;margin-top:16px}
.comment-meta{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);margin-bottom:10px}
.comment-form input[type="text"],.comment-form input[type="email"],.comment-form input[type="url"],.comment-form textarea{width:100%;padding:12px 16px;border:1px solid var(--line-strong);border-radius:10px;font:inherit;font-size:.95rem;background:var(--surface);margin-top:6px}
.comment-form label{font-size:.9rem;font-weight:600}
.comment-form p{margin-bottom:16px}
.comment-form .submit{display:inline-flex;align-items:center;font-weight:600;font-size:.94rem;padding:14px 26px;border-radius:99px;border:0;cursor:pointer;background:var(--coral-cta);color:#fff}
.search form{display:contents}
.search input[type="search"]{border:0;outline:0;background:transparent;font-size:.88rem;color:#fff;width:150px}
.search input[type="search"]::placeholder{color:#9FC3CF}
.hero-search .search{flex:1 1 260px}
.hero-search .search input[type="search"]{width:100%;color:#fff}
.no-results-page{max-width:var(--reading);margin:0 auto;padding:60px 0;text-align:center}
.error-404{text-align:center;padding:90px 0}
.error-404 .big{font-family:var(--font-head);font-size:clamp(4rem,14vw,9rem);color:var(--line-strong);line-height:1;letter-spacing:-.04em}
.ad-widget{margin:34px 0}
/* WordPress pagination markup (.navigation.pagination > .nav-links) */
.pagination .nav-links{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.pagination .page-numbers{min-width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line-strong);border-radius:99px;font-size:.9rem;font-weight:600;color:var(--ink);padding:0 14px;background:var(--surface);transition:all .15s}
.pagination .page-numbers:hover{border-color:var(--mid)}
.pagination .page-numbers.current{background:var(--mid);color:#fff;border-color:var(--mid)}
.pagination .page-numbers.dots{border-color:transparent;background:transparent}
.navigation.pagination{margin:38px 0 0}
.post-nav{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;max-width:940px;margin:0 auto;padding:0 0 40px}
.post-nav a{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:.94rem;color:var(--ink);border:1px solid var(--line-strong);border-radius:99px;padding:12px 22px;background:var(--surface)}
.post-nav a:hover{border-color:var(--mid);color:var(--coral-deep)}

/* FAQ accordion */
.faq .faq-sub{margin:10px 0 0;color:var(--ink-soft);max-width:var(--reading)}
.faq-list{max-width:860px;margin:26px auto 0;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}
.faq-item[open]{border-color:var(--line-strong)}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;font-family:var(--font-head);font-weight:700;font-size:1.06rem;letter-spacing:-.01em;color:var(--ink)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";flex:0 0 auto;font-family:var(--font-mono);font-size:1.5rem;line-height:1;color:var(--coral-deep);transition:transform .2s}
.faq-item[open] summary::after{content:"\2013";transform:none}
.faq-item summary:hover{color:var(--coral-deep)}
.faq-answer{padding:0 24px 22px;color:var(--ink-soft)}
.faq-answer p{margin:0}
.page-head{max-width:860px;margin:0 auto;padding:56px 0 8px;text-align:center}
.page-head h1{font-size:clamp(2rem,4vw,2.9rem);margin:10px 0 0}
.page-head .page-intro{margin:18px auto 0;text-align:left}
@media(max-width:600px){.faq-item summary{padding:16px 18px;font-size:1rem}.faq-answer{padding:0 18px 18px}}

/* ===== CATEGORY ARCHIVE INTRO + BYLINE/AUTHOR EXTRAS ===== */
.category-intro{max-width:var(--reading);margin:28px auto 4px}
.category-intro p{margin-bottom:16px;color:var(--ink-soft)}
.category-intro p:last-child{margin-bottom:0}
.byline-updated{color:var(--ink-soft)}
.byline-updated time{color:inherit}
.byline-policy{color:var(--mid);text-decoration:none;border-bottom:1px dotted currentColor}
.byline-policy:hover{color:var(--coral-deep)}
.author-bio{font-size:.95rem;color:var(--ink-soft);margin-top:8px;line-height:1.6}
.author-social{margin-top:10px;display:flex;flex-wrap:wrap;gap:14px}
.author-social a{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.04em;text-transform:uppercase;color:var(--mid);text-decoration:none}
.author-social a:hover{color:var(--coral-deep);text-decoration:underline}