*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
    --black:#0A0A0A;
    --dark:#111418;
    --panel:#161B22;
    --panel2:#1C2330;
    --border:#252D3A;
    --border2:#2A3447;
    --neon:#00E5FF;
    --neon2:#00FFB3;
    --neon-dim:rgba(0,229,255,.12);
    --neon-glow:0 0 24px rgba(0,229,255,.35),0 0 60px rgba(0,229,255,.12);
    --red:#FF3B5C;
    --yellow:#FFD600;
    --orange:#FF6B35;
    --white:#F0F4F8;
    --grey:#8899AA;
    --grey2:#4A5568;
    --radius:12px;
    --font-display:'Bebas Neue',Impact,sans-serif;
    --font-cond:'Barlow Condensed',sans-serif;
    --font-body:'Barlow',sans-serif;
}
html{scroll-behavior:smooth}
.main-container-running{font-family:var(--font-body);background:var(--black);color:var(--white);
    min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased}

/* Grain overlay */
.main-container-running::after{content:'';position:fixed;inset:0;
    background:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.03'/%3E%3C/svg%3E");
    pointer-events:none;z-index:999}

/* Animated background lines */
.main-container-running::before{content:'';position:fixed;inset:0;
    background:
        repeating-linear-gradient(90deg,transparent,transparent 79px,rgba(0,229,255,.025) 80px),
        radial-gradient(ellipse 70% 50% at 80% 20%,rgba(0,229,255,.06) 0%,transparent 60%),
        radial-gradient(ellipse 50% 60% at 10% 80%,rgba(0,255,179,.04) 0%,transparent 60%);
    z-index:0;pointer-events:none}

/* ==========================
   HEADER
========================== */
.header-running{position:relative;z-index:10;padding:56px 24px 44px;max-width:1000px;margin:0 auto}
.header-top{display:flex;align-items:center;gap:20px;margin-bottom:18px;flex-wrap:wrap}
.header-badge{display:inline-flex;align-items:center;gap:8px;
    border:1px solid var(--neon);color:var(--neon);
    font-family:var(--font-cond);font-size:12px;font-weight:700;letter-spacing:.15em;text-transform:uppercase;
    padding:6px 16px;border-radius:4px;
    box-shadow:0 0 14px rgba(0,229,255,.2);
    background:var(--neon-dim)}
.title-wrap{position:relative}
h1{font-family:var(--font-display);font-size:clamp(3.2rem,10vw,7rem);
    letter-spacing:.03em;line-height:.92;color:var(--white);
    text-shadow:0 0 80px rgba(0,229,255,.15)}
h1 .accent{color:var(--neon);text-shadow:var(--neon-glow)}
.header-sub{font-size:1rem;color:var(--grey);line-height:1.7;max-width:560px;
    margin-top:14px;font-weight:400}
.header-sub strong{color:var(--white);font-weight:600}

/* ==========================
   MAIN WRAPPER
========================== */
main{position:relative;z-index:10;max-width:1000px;margin:0 auto;padding:0 20px 80px}

/* ==========================
   CALCULATOR CARD
========================== */
.calc-card{background:var(--panel);border:1px solid var(--border);border-radius:20px;overflow:hidden;
    box-shadow:0 20px 60px rgba(0,0,0,.5)}

/* MODE TABS */
.mode-tabs{display:grid;grid-template-columns:repeat(3,1fr);border-bottom:1px solid var(--border)}
.mode-tab{padding:18px 10px;text-align:center;cursor:pointer;
    font-family:var(--font-cond);font-size:14px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
    color:var(--grey);border:none;background:transparent;transition:all .2s;position:relative}
.mode-tab::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;
    background:var(--neon);transform:scaleX(0);transition:transform .2s}
.mode-tab:hover{color:var(--white);background:rgba(255,255,255,.03)}
.mode-tab.active{color:var(--neon);background:rgba(0,229,255,.05)}
.mode-tab.active::after{transform:scaleX(1)}
.mode-tab .tab-icon{display:block;font-size:1.3rem;margin-bottom:4px}

/* CALC BODY */
.calc-body{padding:36px 40px}
@media(max-width:620px){.calc-body{padding:24px 20px}}

/* UNIT TOGGLE */
.unit-row{display:flex;align-items:center;gap:12px;margin-bottom:32px}
.unit-label{font-family:var(--font-cond);font-size:12px;font-weight:700;letter-spacing:.1em;
    text-transform:uppercase;color:var(--grey)}
.unit-toggle{display:flex;background:var(--panel2);border:1px solid var(--border2);
    border-radius:8px;overflow:hidden}
.unit-btn{padding:8px 22px;font-family:var(--font-cond);font-size:13px;font-weight:700;
    letter-spacing:.08em;text-transform:uppercase;color:var(--grey);
    border:none;background:transparent;cursor:pointer;transition:all .18s}
.unit-btn.active{background:var(--neon);color:var(--black)}

/* DISTANCE PRESETS */
.dist-presets{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-bottom:24px}
@media(max-width:560px){.dist-presets{grid-template-columns:repeat(3,1fr)}}
.dist-btn{padding:12px 6px;border:1px solid var(--border2);border-radius:8px;
    background:transparent;color:var(--grey);cursor:pointer;text-align:center;
    font-family:var(--font-cond);font-size:13px;font-weight:700;letter-spacing:.05em;
    transition:all .18s}
.dist-btn:hover{border-color:var(--neon);color:var(--neon);background:var(--neon-dim)}
.dist-btn.active{border-color:var(--neon);background:var(--neon-dim);color:var(--neon)}

/* FIELD LABEL */
.field-label{font-family:var(--font-cond);font-size:11px;font-weight:700;letter-spacing:.12em;
    text-transform:uppercase;color:var(--grey);margin-bottom:10px;display:block}

/* TIME INPUT */
.time-row{display:flex;align-items:center;gap:8px;margin-bottom:24px}
.time-sep{font-size:1.6rem;font-weight:700;color:var(--grey2);margin-top:-4px}
.time-input-wrap{display:flex;flex-direction:column;align-items:center;gap:4px;flex:1}
.time-input-wrap span{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--grey2);
    font-family:var(--font-cond);font-weight:600}
.time-input{width:100%;text-align:center;font-family:var(--font-display);font-size:2.2rem;
    color:var(--white);background:var(--panel2);border:1px solid var(--border2);
    border-radius:10px;padding:14px 8px;outline:none;transition:border-color .2s,box-shadow .2s;
    letter-spacing:.06em}
.time-input:focus{border-color:var(--neon);box-shadow:0 0 0 3px rgba(0,229,255,.15)}
.time-input::placeholder{color:var(--grey2)}

/* PACE INPUT */
.pace-row{display:flex;align-items:center;gap:8px;margin-bottom:24px}
.pace-sep{font-size:1.4rem;color:var(--grey2);font-weight:700;padding-top:4px}
.pace-input{width:100%;text-align:center;font-family:var(--font-display);font-size:2.2rem;
    color:var(--white);background:var(--panel2);border:1px solid var(--border2);
    border-radius:10px;padding:14px 8px;outline:none;transition:border-color .2s,box-shadow .2s;
    letter-spacing:.06em}
.pace-input:focus{border-color:var(--neon);box-shadow:0 0 0 3px rgba(0,229,255,.15)}

/* RUNNER NAME */
.name-row{margin-bottom:28px}
.name-input{width:100%;font-family:var(--font-body);font-size:15px;font-weight:500;
    color:var(--white);background:var(--panel2);border:1px solid var(--border2);
    border-radius:10px;padding:13px 18px;outline:none;transition:border-color .2s;-webkit-appearance:none}
.name-input:focus{border-color:var(--neon);box-shadow:0 0 0 3px rgba(0,229,255,.15)}
.name-input::placeholder{color:var(--grey2)}

/* CUSTOM DISTANCE */
.custom-dist-wrap{display:none;margin-bottom:24px}
.custom-dist-input{width:100%;text-align:center;font-family:var(--font-display);font-size:2.2rem;
    color:var(--white);background:var(--panel2);border:1px solid var(--border2);
    border-radius:10px;padding:14px 8px;outline:none;transition:border-color .2s;letter-spacing:.06em}
.custom-dist-input:focus{border-color:var(--neon);box-shadow:0 0 0 3px rgba(0,229,255,.15)}

/* CALCULATE BUTTON */
.calc-btn{width:100%;padding:18px 24px;
    background:linear-gradient(135deg,var(--neon) 0%,var(--neon2) 100%);
    color:var(--black);font-family:var(--font-cond);font-size:17px;font-weight:700;
    letter-spacing:.12em;text-transform:uppercase;
    border:none;border-radius:12px;cursor:pointer;transition:all .22s;
    box-shadow:0 8px 32px rgba(0,229,255,.25)}
.calc-btn:hover{transform:translateY(-2px);box-shadow:0 14px 40px rgba(0,229,255,.4)}
.calc-btn:active{transform:translateY(0)}

/* ERROR */
.error-bar{background:rgba(255,59,92,.1);border:1px solid rgba(255,59,92,.4);
    border-radius:10px;padding:14px 18px;color:var(--red);font-size:14px;
    font-weight:500;margin-bottom:22px;display:flex;align-items:center;gap:10px}

/* ==========================
   RESULT SECTION
========================== */
.result-section{display:none;border-top:1px solid var(--border)}

/* HERO RESULT */
.result-hero{
    background:linear-gradient(145deg,#0D1B2A 0%,#0A1628 60%,#061020 100%);
    padding:44px 40px 36px;
    position:relative;overflow:hidden}
@media(max-width:620px){.result-hero{padding:30px 20px}}
.result-hero::before{content:'';position:absolute;top:-60px;right:-60px;
    width:300px;height:300px;border-radius:50%;
    background:radial-gradient(circle,rgba(0,229,255,.12) 0%,transparent 70%);pointer-events:none}
.result-hero::after{content:'';position:absolute;bottom:-40px;left:-30px;
    width:200px;height:200px;border-radius:50%;
    background:radial-gradient(circle,rgba(0,255,179,.07) 0%,transparent 70%);pointer-events:none}
.result-hero-inner{position:relative;z-index:2}

.result-runner{font-family:var(--font-cond);font-size:13px;font-weight:700;letter-spacing:.12em;
    text-transform:uppercase;color:var(--neon);margin-bottom:4px}
.result-subtitle{font-size:13px;color:var(--grey);margin-bottom:20px}

/* Big result display */
.result-big{display:flex;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:12px}
.result-value{font-family:var(--font-display);font-size:clamp(4rem,16vw,8rem);
    color:var(--white);line-height:.95;letter-spacing:.02em;
    text-shadow:0 0 60px rgba(0,229,255,.2);
    animation:popIn .5s cubic-bezier(.34,1.56,.64,1) both;animation-delay:.1s}
.result-unit{font-family:var(--font-cond);font-size:1.4rem;font-weight:600;
    color:var(--grey);letter-spacing:.06em;text-transform:uppercase}

/* Stat grid */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:24px 0 28px}
@media(max-width:560px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
.stat-card{background:rgba(255,255,255,.04);border:1px solid var(--border2);
    border-radius:12px;padding:16px 14px}
.stat-card-label{font-family:var(--font-cond);font-size:10px;font-weight:700;
    letter-spacing:.12em;text-transform:uppercase;color:var(--grey);margin-bottom:6px}
.stat-card-value{font-family:var(--font-cond);font-size:1.35rem;font-weight:700;color:var(--white)}
.stat-card-value .unit{font-size:.8rem;color:var(--grey);margin-left:3px}

/* Result actions */
.result-actions{display:flex;gap:12px;flex-wrap:wrap}
.r-btn{display:inline-flex;align-items:center;gap:7px;padding:10px 18px;
    border-radius:8px;font-family:var(--font-cond);font-size:13px;font-weight:700;
    letter-spacing:.07em;text-transform:uppercase;cursor:pointer;transition:all .18s;border:none}
.r-btn-primary{background:var(--neon);color:var(--black)}
.r-btn-primary:hover{background:var(--neon2);transform:translateY(-1px)}
.r-btn-secondary{background:rgba(255,255,255,.07);color:var(--white);border:1px solid var(--border2)}
.r-btn-secondary:hover{background:rgba(255,255,255,.12);transform:translateY(-1px)}
.r-btn-ghost{background:transparent;color:var(--grey);border:1px solid var(--border)}
.r-btn-ghost:hover{color:var(--white);background:rgba(255,255,255,.05)}

/* ==========================
   TRAINING ZONES
========================== */
.zones-section{padding:32px 40px;border-top:1px solid var(--border);background:var(--panel)}
@media(max-width:620px){.zones-section{padding:24px 20px}}
.section-eyebrow{font-family:var(--font-cond);font-size:11px;font-weight:700;
    letter-spacing:.15em;text-transform:uppercase;color:var(--grey);margin-bottom:6px}
.section-title{font-family:var(--font-display);font-size:2rem;color:var(--white);
    margin-bottom:20px;letter-spacing:.04em}
.zones-grid{display:flex;flex-direction:column;gap:12px}
.zone-row{display:flex;align-items:center;gap:14px;
    background:rgba(255,255,255,.03);border:1px solid var(--border2);
    border-radius:10px;padding:14px 16px;transition:background .18s}
.zone-row:hover{background:rgba(255,255,255,.055)}
.zone-dot{width:12px;height:12px;border-radius:50%;flex-shrink:0}
.zone-name{font-family:var(--font-cond);font-size:13px;font-weight:700;
    letter-spacing:.06em;text-transform:uppercase;color:var(--white);
    min-width:180px;flex-shrink:0}
@media(max-width:560px){.zone-name{min-width:120px}}
.zone-pace{font-family:var(--font-display);font-size:1.4rem;color:var(--white);
    min-width:120px;flex-shrink:0}
.zone-desc{font-size:13px;color:var(--grey);line-height:1.4}
.zone-bar-wrap{flex:1;height:4px;background:var(--border);border-radius:2px;min-width:60px}
.zone-bar{height:100%;border-radius:2px;transition:width 1s ease}

/* ==========================
   SPLITS TABLE
========================== */
.splits-section{padding:32px 40px;border-top:1px solid var(--border)}
@media(max-width:620px){.splits-section{padding:24px 20px}}
.splits-toggle{display:flex;align-items:center;gap:10px;cursor:pointer;margin-bottom:0;
    user-select:none;width:fit-content}
.splits-toggle-icon{font-size:1.2rem;transition:transform .2s}
.splits-toggle.open .splits-toggle-icon{transform:rotate(90deg)}
.splits-table-wrap{display:none;margin-top:20px;overflow-x:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:10px 14px;text-align:left;font-size:13px;border-bottom:1px solid var(--border)}
th{font-family:var(--font-cond);font-size:11px;font-weight:700;letter-spacing:.1em;
    text-transform:uppercase;color:var(--grey);background:var(--panel2)}
td{color:var(--white);font-family:var(--font-cond);font-weight:600;font-size:14px}
tr:hover td{background:rgba(0,229,255,.04)}
td:first-child{color:var(--grey);font-weight:400}

/* ==========================
   RACE COMPARISON
========================== */
.race-comp{padding:32px 40px;border-top:1px solid var(--border);background:var(--panel)}
@media(max-width:620px){.race-comp{padding:24px 20px}}
.race-comp-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:20px}
@media(max-width:560px){.race-comp-grid{grid-template-columns:repeat(2,1fr)}}
.race-card{background:var(--panel2);border:1px solid var(--border2);border-radius:12px;
    padding:18px 14px;text-align:center;transition:border-color .18s}
.race-card:hover{border-color:var(--neon)}
.race-card-dist{font-family:var(--font-cond);font-size:12px;font-weight:700;
    letter-spacing:.1em;text-transform:uppercase;color:var(--grey);margin-bottom:8px}
.race-card-time{font-family:var(--font-display);font-size:1.7rem;color:var(--white);
    letter-spacing:.04em}

/* ==========================
   INFO GRID
========================== */
.info-grid{margin-top:40px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:640px){.info-grid{grid-template-columns:1fr}}
.info-card{background:var(--panel);border:1px solid var(--border);border-radius:16px;
    padding:24px 20px;transition:border-color .2s}
.info-card:hover{border-color:var(--border2)}
.info-card-icon{font-size:1.8rem;margin-bottom:10px;display:block}
.info-card-title{font-family:var(--font-cond);font-size:1rem;font-weight:700;
    letter-spacing:.06em;text-transform:uppercase;color:var(--white);margin-bottom:7px}
.info-card-text{font-size:13.5px;color:var(--grey);line-height:1.6}

/* ==========================
   ARTICLE
========================== */
.article-wrap{margin-top:60px;background:var(--panel);border:1px solid var(--border);
    border-radius:20px;padding:56px 64px}
@media(max-width:680px){.article-wrap{padding:32px 22px}}
.article-tag{display:inline-flex;align-items:center;gap:8px;
    border:1px solid var(--border2);border-radius:4px;
    font-family:var(--font-cond);font-size:11px;font-weight:700;
    letter-spacing:.12em;text-transform:uppercase;color:var(--grey);
    padding:6px 14px;margin-bottom:20px}
.article-wrap h2{font-family:var(--font-display);font-size:clamp(2rem,5vw,3.2rem);
    color:var(--white);letter-spacing:.04em;line-height:1.05;margin-bottom:14px}
.article-wrap h3{font-family:var(--font-cond);font-size:1.25rem;font-weight:700;
    letter-spacing:.06em;text-transform:uppercase;
    color:var(--neon);margin:36px 0 12px;padding-left:14px;
    border-left:3px solid var(--neon)}
.article-wrap p{font-size:1rem;line-height:1.84;color:rgba(240,244,248,.75);margin-bottom:16px}
.article-wrap ul{margin:0 0 16px 22px}
.article-wrap ul li{font-size:1rem;line-height:1.8;color:rgba(240,244,248,.75);margin-bottom:6px}
.article-wrap strong{color:var(--white);font-weight:600}
.article-divider{height:1px;background:linear-gradient(90deg,var(--neon),transparent);
    border:none;margin:36px 0;opacity:.4}

/* PACE TABLE */
.pace-table-wrap{overflow-x:auto;margin:16px 0 24px}
.pace-table{width:100%;border-collapse:collapse;font-size:13.5px}
.pace-table th{font-family:var(--font-cond);font-size:11px;font-weight:700;
    letter-spacing:.1em;text-transform:uppercase;color:var(--grey);
    padding:10px 12px;border-bottom:1px solid var(--border2);text-align:left}
.pace-table td{padding:10px 12px;border-bottom:1px solid var(--border);color:rgba(240,244,248,.8)}
.pace-table tr:hover td{background:rgba(0,229,255,.04)}

/* FAQ */
.faq-item{border-bottom:1px solid var(--border);padding:18px 0}
.faq-item:last-child{border-bottom:none}
.faq-q{font-family:var(--font-cond);font-size:1rem;font-weight:700;letter-spacing:.04em;
    text-transform:uppercase;color:var(--white);cursor:pointer;
    display:flex;justify-content:space-between;align-items:center;gap:12px;user-select:none}
.faq-q::after{content:'＋';font-size:1.3rem;color:var(--neon);flex-shrink:0;transition:transform .22s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{font-size:.96rem;color:var(--grey);line-height:1.78;padding-top:12px;display:none}



/* CANVAS */
#exportCanvas{position:absolute;left:-9999px;top:0}

/* ANIMATIONS */
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes popIn{from{opacity:0;transform:scale(.72)}to{opacity:1;transform:scale(1)}}
@keyframes zoneIn{from{width:0}to{}}
.animate-in{animation:fadeUp .45s ease both}

/* HIDDEN */
#mode_hidden{display:none}