/* ===================================================================
   arsenal.fit — design system
   Athletic, bold, energetic. Dark forge base + ember/electric accents.
   =================================================================== */

:root{
  --ink:#0b0d10;          /* near-black base */
  --panel:#13171c;        /* card surface */
  --panel-2:#1a2027;      /* raised surface */
  --line:#272f38;         /* hairline */
  --text:#e7ecf2;         /* primary text */
  --muted:#9aa6b2;        /* secondary text */
  --muted-2:#6b7682;      /* tertiary */
  --ember:#ff5a1f;        /* primary accent (orange) */
  --ember-2:#ff8a3d;      /* warm hover */
  --volt:#19e6a8;         /* electric green (success/tools) */
  --volt-deep:#0fae7e;
  --steel:#3aa0ff;        /* cool accent */
  --warn:#ffce3a;
  --danger:#ff4d57;
  --maxw:1140px;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 18px 50px -22px rgba(0,0,0,.75);
  --shadow-glow:0 0 0 1px rgba(255,90,31,.25), 0 22px 60px -28px rgba(255,90,31,.55);
  --grad-ember:linear-gradient(135deg,#ff5a1f 0%,#ff8a3d 55%,#ffb347 100%);
  --grad-volt:linear-gradient(135deg,#19e6a8 0%,#3aa0ff 100%);
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --display:'Barlow Condensed','Inter',sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--ink);color:var(--text);
  font-family:var(--font);font-size:17px;line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(255,90,31,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(25,230,168,.07), transparent 55%);
  background-attachment:fixed;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--ember-2);text-decoration:none}
a:hover{color:var(--ember)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

h1,h2,h3,h4{font-family:var(--display);font-weight:700;line-height:1.05;letter-spacing:.2px;margin:0 0 .5em}
h1{font-size:clamp(2.4rem,6vw,4.1rem);text-transform:uppercase}
h2{font-size:clamp(1.7rem,3.6vw,2.5rem);text-transform:uppercase;margin-top:1.6em}
h3{font-size:clamp(1.25rem,2.2vw,1.55rem);margin-top:1.4em}
h4{font-size:1.1rem;font-family:var(--font);font-weight:700;text-transform:none}
p{margin:0 0 1.1em}
strong{color:#fff}
ul,ol{margin:0 0 1.2em;padding-left:1.25em}
li{margin:.4em 0}
hr{border:none;border-top:1px solid var(--line);margin:2.4em 0}
small{color:var(--muted)}
::selection{background:rgba(255,90,31,.35);color:#fff}

/* ---------- skip link ---------- */
.skip{position:absolute;left:-999px;top:0;background:var(--ember);color:#fff;padding:10px 16px;z-index:200;border-radius:0 0 8px 0}
.skip:focus{left:0}

/* ---------- header / nav ---------- */
.site-head{position:sticky;top:0;z-index:90;background:rgba(11,13,16,.82);backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:18px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:700;font-size:1.5rem;text-transform:uppercase;letter-spacing:.5px;color:#fff;white-space:nowrap}
.brand .logo{width:34px;height:34px;flex:0 0 auto}
.brand b{color:var(--ember)}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-links a{color:var(--muted);font-weight:600;font-size:.95rem;padding:8px 12px;border-radius:9px;white-space:nowrap}
.nav-links a:hover{color:#fff;background:var(--panel-2)}
.nav-cta{background:var(--grad-ember);color:#fff !important;font-weight:700 !important;box-shadow:0 8px 22px -10px rgba(255,90,31,.8)}
.nav-cta:hover{filter:brightness(1.05)}

/* dropdown */
.has-drop{position:relative}
.drop-btn{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-weight:600;font-size:.95rem;padding:8px 12px;border-radius:9px;background:none;border:0;cursor:pointer;font-family:var(--font)}
.drop-btn:hover{color:#fff;background:var(--panel-2)}
.drop-menu{position:absolute;top:calc(100% + 8px);right:0;min-width:230px;background:var(--panel);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);padding:8px;display:none;flex-direction:column;gap:2px}
.has-drop.open .drop-menu{display:flex}
.drop-menu a{color:var(--muted);padding:9px 12px;border-radius:9px;font-size:.92rem}
.drop-menu a:hover{background:var(--panel-2);color:#fff}
.drop-menu .lbl{font-size:.72rem;text-transform:uppercase;letter-spacing:1px;color:var(--muted-2);padding:8px 12px 4px;font-weight:700}

/* hamburger */
.burger{display:none;margin-left:auto;background:var(--panel-2);border:1px solid var(--line);color:#fff;width:44px;height:42px;border-radius:11px;cursor:pointer;align-items:center;justify-content:center}
.burger svg{width:22px;height:22px}

@media(max-width:920px){
  .nav-links{position:fixed;inset:66px 0 auto 0;flex-direction:column;align-items:stretch;gap:2px;background:var(--ink);border-bottom:1px solid var(--line);padding:12px 16px 20px;margin-left:0;transform:translateY(-130%);transition:transform .28s ease;max-height:calc(100vh - 66px);overflow:auto}
  .nav-links.show{transform:translateY(0)}
  .nav-links a,.drop-btn{padding:13px 14px;font-size:1.05rem;width:100%;text-align:left}
  .drop-menu{position:static;display:flex;box-shadow:none;border:0;background:transparent;padding:0 0 6px 10px;min-width:0}
  .has-drop .drop-menu{display:flex}
  .drop-btn{justify-content:space-between}
  .burger{display:inline-flex}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-family:var(--font);font-size:1rem;padding:13px 22px;border-radius:12px;border:1px solid transparent;cursor:pointer;transition:.18s;line-height:1}
.btn-primary{background:var(--grad-ember);color:#fff;box-shadow:0 12px 28px -12px rgba(255,90,31,.85)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px);color:#fff}
.btn-volt{background:var(--grad-volt);color:#05110d;box-shadow:0 12px 28px -12px rgba(25,230,168,.7)}
.btn-volt:hover{filter:brightness(1.06);transform:translateY(-1px);color:#05110d}
.btn-ghost{background:var(--panel-2);color:#fff;border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ember);color:#fff;transform:translateY(-1px)}
.btn-lg{padding:16px 28px;font-size:1.08rem}

/* ---------- hero ---------- */
.hero{position:relative;padding:64px 0 40px;overflow:hidden}
.hero .eyebrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--display);text-transform:uppercase;letter-spacing:2px;font-weight:700;font-size:.95rem;color:var(--ember);background:rgba(255,90,31,.10);border:1px solid rgba(255,90,31,.3);padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero h1{margin-bottom:.35em;max-width:16ch}
.hero h1 em{font-style:normal;background:var(--grad-ember);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lede{font-size:1.2rem;color:var(--muted);max-width:62ch;margin-bottom:1.6em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
@media(max-width:880px){.hero-grid{grid-template-columns:1fr;gap:26px}.hero-art{order:-1}}

.stat-row{display:flex;gap:30px;flex-wrap:wrap;margin-top:30px;padding-top:24px;border-top:1px solid var(--line)}
.stat .n{font-family:var(--display);font-size:2.1rem;font-weight:700;color:#fff;line-height:1}
.stat .l{font-size:.8rem;text-transform:uppercase;letter-spacing:1px;color:var(--muted-2);margin-top:4px}

/* ---------- sections ---------- */
.section{padding:54px 0}
.section-head{max-width:62ch}
.section-head .kicker{font-family:var(--display);text-transform:uppercase;letter-spacing:2px;color:var(--ember);font-weight:700;font-size:.9rem;margin-bottom:8px}
.lead{font-size:1.15rem;color:var(--muted)}

/* ---------- cards / grids ---------- */
.grid{display:grid;gap:20px}
.g-2{grid-template-columns:repeat(2,1fr)}
.g-3{grid-template-columns:repeat(3,1fr)}
.g-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:880px){.g-3,.g-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.g-2,.g-3,.g-4{grid-template-columns:1fr}}

.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.2s;position:relative;overflow:hidden}
.card:hover{border-color:rgba(255,90,31,.45);transform:translateY(-3px);box-shadow:var(--shadow)}
.card h3{margin-top:0}
.card p{color:var(--muted);font-size:.98rem;margin-bottom:0}
.card .ic{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(255,90,31,.12);margin-bottom:14px;color:var(--ember)}
.card .ic svg{width:26px;height:26px}
.card.tool .ic{background:rgba(25,230,168,.12);color:var(--volt)}
.card-link{display:flex;flex-direction:column;height:100%}
.card-link .more{margin-top:14px;color:var(--ember);font-weight:700;font-size:.9rem;display:inline-flex;align-items:center;gap:6px}
.card.tool .more{color:var(--volt)}

.pill{display:inline-block;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;padding:4px 10px;border-radius:999px;background:var(--panel-2);color:var(--muted);border:1px solid var(--line)}
.pill.beg{color:var(--volt);border-color:rgba(25,230,168,.4)}
.pill.int{color:var(--warn);border-color:rgba(255,206,58,.4)}
.pill.adv{color:var(--danger);border-color:rgba(255,77,87,.4)}

/* ---------- article ---------- */
.article{padding:30px 0 60px}
.article-head{max-width:760px;margin:0 auto 8px}
.article-meta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;color:var(--muted-2);font-size:.85rem;margin:14px 0 6px}
.article-meta .author{display:flex;align-items:center;gap:8px;color:var(--muted)}
.author-img{width:30px;height:30px;border-radius:50%;background:var(--grad-ember);display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:.85rem}
.prose{max-width:760px;margin:0 auto}
.prose h2{border-left:4px solid var(--ember);padding-left:14px}
.prose h3{color:#fff}
.prose img,.prose svg,.prose figure{border-radius:var(--radius)}
.prose figure{margin:1.8em 0;background:var(--panel);border:1px solid var(--line);padding:18px;border-radius:var(--radius)}
.prose figcaption{color:var(--muted-2);font-size:.85rem;text-align:center;margin-top:10px}
.prose a{border-bottom:1px solid rgba(255,138,61,.4)}
.prose a:hover{border-color:var(--ember)}
.prose blockquote{margin:1.6em 0;padding:14px 20px;border-left:4px solid var(--volt);background:var(--panel);border-radius:0 12px 12px 0;color:var(--text)}
.prose code{background:var(--panel-2);padding:2px 7px;border-radius:6px;font-size:.9em;color:var(--ember-2)}

/* callout / disclaimer */
.callout{background:linear-gradient(180deg,rgba(58,160,255,.08),transparent);border:1px solid var(--line);border-left:4px solid var(--steel);border-radius:0 12px 12px 0;padding:16px 18px;margin:1.6em 0}
.callout.warn{border-left-color:var(--warn);background:linear-gradient(180deg,rgba(255,206,58,.08),transparent)}
.callout.tip{border-left-color:var(--volt);background:linear-gradient(180deg,rgba(25,230,168,.08),transparent)}
.callout p:last-child{margin-bottom:0}
.callout .t{font-weight:800;color:#fff;display:block;margin-bottom:4px;font-size:.95rem}

.med-disc{font-size:.86rem;color:var(--muted);background:var(--panel);border:1px dashed var(--line);border-radius:12px;padding:14px 16px;margin:1.6em 0}
.med-disc strong{color:var(--warn)}

/* table */
.table-wrap{overflow-x:auto;margin:1.6em 0;border:1px solid var(--line);border-radius:var(--radius)}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:480px}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--panel-2);color:#fff;font-family:var(--display);text-transform:uppercase;letter-spacing:.5px;font-size:.85rem}
tr:last-child td{border-bottom:none}
td{color:var(--muted)}

/* key takeaways */
.kt{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin:0 0 26px}
.kt .t{font-family:var(--display);text-transform:uppercase;letter-spacing:1px;color:var(--ember);font-size:.95rem;font-weight:700;margin-bottom:8px}
.kt ul{margin:0;padding-left:1.1em}
.kt li{color:var(--text)}

/* breadcrumbs */
.crumbs{font-size:.82rem;color:var(--muted-2);padding:18px 0 0}
.crumbs a{color:var(--muted)}
.crumbs span{margin:0 7px;opacity:.5}

/* TOC */
.toc{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin:0 0 26px}
.toc .t{font-family:var(--display);text-transform:uppercase;letter-spacing:1px;font-size:.85rem;color:var(--muted-2);margin-bottom:8px}
.toc ol{margin:0;padding-left:1.2em;columns:2;column-gap:30px}
.toc a{color:var(--muted);font-size:.92rem;border:none}
.toc a:hover{color:var(--ember)}
@media(max-width:560px){.toc ol{columns:1}}

/* faq */
.faq details{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;background:var(--panel);overflow:hidden}
.faq summary{cursor:pointer;padding:15px 18px;font-weight:700;color:#fff;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:1.02rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--ember);font-size:1.5rem;font-weight:400;line-height:1;transition:.2s}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 18px 16px;color:var(--muted)}
.faq .a p:last-child{margin-bottom:0}

/* related / next */
.related{margin-top:40px}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:760px){.rel-grid{grid-template-columns:1fr}}
.rel{display:block;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:16px 18px;transition:.18s}
.rel:hover{border-color:var(--ember);transform:translateY(-2px)}
.rel .k{font-size:.72rem;text-transform:uppercase;letter-spacing:1px;color:var(--ember);font-weight:700}
.rel .h{color:#fff;font-weight:700;margin-top:5px;font-family:var(--display);font-size:1.15rem;line-height:1.15}

/* ---------- tools / calculators ---------- */
.calc{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin:0 0 24px;box-shadow:var(--shadow)}
.calc-grid{display:grid;grid-template-columns:1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:4px}
.field label{font-weight:700;color:#fff;font-size:.95rem}
.field .hint{font-size:.8rem;color:var(--muted-2);font-weight:400}
.field input,.field select{background:var(--ink);border:1px solid var(--line);color:#fff;border-radius:10px;padding:12px 14px;font-size:1rem;font-family:var(--font);width:100%;transition:.15s}
.field input:focus,.field select:focus{outline:none;border-color:var(--ember);box-shadow:0 0 0 3px rgba(255,90,31,.18)}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:520px){.field-row{grid-template-columns:1fr}}

.seg{display:inline-flex;background:var(--ink);border:1px solid var(--line);border-radius:10px;padding:4px;gap:4px}
.seg button{flex:1;background:none;border:0;color:var(--muted);font-weight:700;padding:9px 16px;border-radius:7px;cursor:pointer;font-family:var(--font);font-size:.92rem;transition:.15s}
.seg button.active{background:var(--grad-ember);color:#fff}
.seg.volt button.active{background:var(--grad-volt);color:#05110d}

.result{margin-top:6px;background:linear-gradient(180deg,rgba(25,230,168,.07),transparent);border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center;display:none}
.result.show{display:block;animation:pop .3s ease}
@keyframes pop{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:scale(1)}}
.result .big{font-family:var(--display);font-size:3rem;font-weight:700;color:var(--volt);line-height:1}
.result .unit{font-size:1rem;color:var(--muted);font-family:var(--font)}
.result .cat{display:inline-block;margin-top:8px;font-weight:700;padding:5px 14px;border-radius:999px;font-size:.9rem}
.result .sub{color:var(--muted);margin-top:10px;font-size:.95rem}
.result .breakdown{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-top:18px;text-align:left}
.result .breakdown .b{background:var(--ink);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.result .breakdown .b .v{font-family:var(--display);font-size:1.5rem;color:#fff;font-weight:700;line-height:1}
.result .breakdown .b .k{font-size:.74rem;text-transform:uppercase;letter-spacing:.5px;color:var(--muted-2);margin-top:3px}

/* timer */
.timer-display{font-family:var(--display);font-size:clamp(4rem,18vw,8rem);font-weight:700;text-align:center;line-height:1;letter-spacing:2px;color:#fff;margin:10px 0}
.timer-display.work{color:var(--ember)}
.timer-display.rest{color:var(--volt)}
.timer-phase{text-align:center;font-family:var(--display);text-transform:uppercase;letter-spacing:4px;font-size:1.4rem;color:var(--muted);margin-bottom:6px}
.timer-controls{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:10px}
.timer-ring{display:block;margin:0 auto}

/* macro / progress bar viz */
.bar{height:14px;border-radius:999px;background:var(--ink);overflow:hidden;border:1px solid var(--line)}
.bar > span{display:block;height:100%;border-radius:999px}

/* ---------- CTA band ---------- */
.cta-band{background:var(--grad-ember);border-radius:22px;padding:42px;text-align:center;position:relative;overflow:hidden;margin:30px 0}
.cta-band h2{color:#fff;margin-top:0}
.cta-band p{color:rgba(255,255,255,.92);max-width:54ch;margin:0 auto 22px;font-size:1.1rem}
.cta-band .btn-ghost{background:rgba(0,0,0,.18);border-color:rgba(255,255,255,.4);color:#fff}
.cta-band .btn-light{background:#fff;color:#b3360f}
.cta-band .btn-light:hover{background:#fff;transform:translateY(-1px)}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--line);background:#090b0e;margin-top:50px;padding:44px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:460px){.foot-grid{grid-template-columns:1fr}}
.foot-grid h5{font-family:var(--display);text-transform:uppercase;letter-spacing:1px;font-size:.95rem;color:#fff;margin:0 0 12px}
.foot-grid a{display:block;color:var(--muted);font-size:.92rem;padding:5px 0}
.foot-grid a:hover{color:var(--ember)}
.foot-about{color:var(--muted);font-size:.92rem;max-width:34ch}
.foot-bottom{border-top:1px solid var(--line);margin-top:30px;padding-top:20px;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;color:var(--muted-2);font-size:.85rem}
.foot-bottom a{color:var(--muted-2)}

/* ---------- cookie banner ---------- */
.cookie{position:fixed;left:16px;right:16px;bottom:16px;max-width:760px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px 20px;box-shadow:var(--shadow);z-index:120;display:none;gap:16px;align-items:center;flex-wrap:wrap}
.cookie.show{display:flex}
.cookie p{margin:0;font-size:.9rem;color:var(--muted);flex:1 1 280px}
.cookie a{color:var(--ember-2)}
.cookie .ck-btns{display:flex;gap:10px;flex-wrap:wrap}
.cookie button{font-size:.9rem;padding:10px 18px}

/* ---------- misc utility ---------- */
.center{text-align:center}
.muted{color:var(--muted)}
.mt0{margin-top:0}.mb0{margin-bottom:0}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 0}
.divider-band{height:3px;background:var(--grad-ember);border-radius:2px;width:64px;margin:18px 0}
.adslot{margin:26px auto;max-width:760px;min-height:1px}
.feature-row{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:14px}
@media(max-width:760px){.feature-row{grid-template-columns:1fr}}
.mini{display:flex;gap:12px;align-items:flex-start}
.mini .ic{flex:0 0 auto;width:40px;height:40px;border-radius:10px;background:rgba(255,90,31,.12);color:var(--ember);display:flex;align-items:center;justify-content:center}
.mini .ic svg{width:22px;height:22px}
.mini h4{margin:0 0 3px}
.mini p{color:var(--muted);font-size:.92rem;margin:0}

/* category hub strip */
.cat-strip{display:flex;gap:10px;flex-wrap:wrap;margin:22px 0 0}
.cat-strip a{font-family:var(--display);text-transform:uppercase;letter-spacing:.5px;font-size:.9rem;font-weight:700;padding:9px 16px;border-radius:999px;background:var(--panel-2);border:1px solid var(--line);color:var(--muted)}
.cat-strip a:hover,.cat-strip a.on{background:var(--grad-ember);color:#fff;border-color:transparent}

@media(max-width:560px){
  body{font-size:16px}
  .hero{padding:40px 0 24px}
  .section{padding:40px 0}
  .cta-band{padding:30px 20px}
  .calc{padding:20px}
}