@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* ══ THEMES ══ */
:root{--bg:#f4f5f7;--surface:#fff;--surface-raised:#eef0f4;--border:#d4d6e0;--border-light:#dfe1ea;--accent:#2563eb;--accent-soft:rgba(37,99,235,.07);--accent-med:rgba(37,99,235,.14);--green:#16a34a;--green-soft:rgba(22,163,74,.08);--green-med:rgba(22,163,74,.14);--red:#dc2626;--red-soft:rgba(220,38,38,.06);--orange:#c2750a;--orange-soft:rgba(194,117,10,.06);--text:#1a1c23;--text-secondary:#484c5e;--text-muted:#6e7189;--radius:10px;--field-bg:#fff;--shadow-btn:0 2px 8px rgba(37,99,235,.2);--shadow-btn-hover:0 4px 14px rgba(37,99,235,.25);--tile-bg:#232838;--tile-char:#f0f2f7;--tile-word:rgba(240,242,247,.75);--tile-digit-bg:#382e1c;--tile-digit-char:#e5a832;--tile-digit-word:rgba(229,168,50,.7);--tile-inv-bg:#2563eb;--tile-inv-char:#fff;--tile-inv-word:rgba(255,255,255,.85);--tile-inv-digit-bg:#1e4fc2;--tile-inv-digit-char:#fcd779;--tile-inv-digit-word:rgba(252,215,121,.8)}
html.dark{--bg:#0f1015;--surface:#181921;--surface-raised:#1f212c;--border:#2d2f3e;--border-light:#363849;--accent:#5b9cf6;--accent-soft:rgba(91,156,246,.1);--accent-med:rgba(91,156,246,.2);--green:#34d072;--green-soft:rgba(52,208,114,.1);--green-med:rgba(52,208,114,.18);--red:#f06060;--red-soft:rgba(240,96,96,.1);--orange:#f5b731;--orange-soft:rgba(245,183,49,.08);--text:#e8eaf0;--text-secondary:#b0b4c8;--text-muted:#838699;--field-bg:#0f1015;--shadow-btn:0 2px 8px rgba(91,156,246,.3);--shadow-btn-hover:0 4px 14px rgba(91,156,246,.35);--tile-bg:#d8dce8;--tile-char:#1a1e2c;--tile-word:rgba(26,30,44,.6);--tile-digit-bg:#e8d9be;--tile-digit-char:#6b4c12;--tile-digit-word:rgba(107,76,18,.6);--tile-inv-bg:#5b9cf6;--tile-inv-char:#fff;--tile-inv-word:rgba(255,255,255,.85);--tile-inv-digit-bg:#4080e8;--tile-inv-digit-char:#fcd779;--tile-inv-digit-word:rgba(252,215,121,.8)}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;line-height:1.6;transition:background .3s,color .3s}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}

/* ══ HEADER ══ */
.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;transition:background .3s,border-color .3s}
.header-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:60px}
.header-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:15px;letter-spacing:-.3px;color:var(--text);text-decoration:none}.header-brand:hover{text-decoration:none}
.brand-icon{width:32px;height:32px;border-radius:8px;background:var(--accent);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.header-nav{display:flex;align-items:center;gap:2px}
.header-nav>a,.nav-dropdown-trigger{padding:8px 12px;border-radius:7px;font-size:12.5px;font-weight:600;color:var(--text-muted);text-decoration:none;transition:all .15s;white-space:nowrap}
.header-nav>a:hover,.nav-dropdown-trigger:hover{color:var(--text);background:var(--surface-raised);text-decoration:none}
.header-nav>a.active{color:var(--accent);background:var(--accent-soft)}
.nav-dropdown{position:relative}
.nav-dropdown-menu{display:none;position:absolute;top:100%;left:0;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:6px;min-width:220px;box-shadow:0 8px 24px rgba(0,0,0,.1);z-index:200}
html.dark .nav-dropdown-menu{box-shadow:0 8px 24px rgba(0,0,0,.4)}
.nav-dropdown:hover .nav-dropdown-menu{display:block}
.nav-dropdown-menu a{display:block;padding:10px 14px;border-radius:6px;font-size:13px;font-weight:600;color:var(--text-secondary);text-decoration:none;transition:all .1s}
.nav-dropdown-menu a:hover{background:var(--surface-raised);color:var(--text)}
.theme-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;background:var(--surface-raised);border:1px solid var(--border);cursor:pointer;color:var(--text-muted);transition:all .15s;flex-shrink:0;margin-left:6px}
.theme-btn:hover{color:var(--text);border-color:var(--border-light)}
.theme-btn .sun-icon{display:none}.theme-btn .moon-icon{display:flex}
html.dark .theme-btn .sun-icon{display:flex}html.dark .theme-btn .moon-icon{display:none}
.hamburger{display:none;background:none;border:none;color:var(--text);cursor:pointer;padding:8px}
.mobile-nav{display:none;background:var(--surface);border-bottom:1px solid var(--border);padding:8px 16px 16px}
.mobile-nav.open{display:block}
.mobile-nav a{display:block;padding:11px 14px;border-radius:8px;font-size:14px;font-weight:600;color:var(--text-secondary);text-decoration:none;transition:all .15s}
.mobile-nav a:hover{background:var(--surface-raised);color:var(--text)}
.mobile-nav-divider{height:1px;background:var(--border);margin:8px 0}
@media(max-width:900px){.header-nav{display:none}.hamburger{display:block}.header-inner{padding:0 16px}}

/* ══ PAGE LAYOUT ══ */
.page-content{max-width:780px;margin:0 auto;padding:40px 24px 60px}
.page-content.wide{max-width:860px}
.page-content.extra-wide{max-width:1200px}
.page-hero{text-align:center;padding:56px 24px 48px;max-width:800px;margin:0 auto}
.page-hero h1{font-size:36px;font-weight:800;letter-spacing:-1px;line-height:1.15;margin-bottom:14px}
.page-hero .hero-sub{font-size:16px;color:var(--text-secondary);font-weight:500;max-width:580px;margin:0 auto;line-height:1.6}
.page-title{font-size:28px;font-weight:800;letter-spacing:-.6px;line-height:1.2;margin-bottom:6px}
.page-sub{font-size:15px;color:var(--text-muted);font-weight:500;margin-bottom:28px}
@media(max-width:760px){.page-content{padding:28px 16px 48px}.page-hero{padding:36px 16px 32px}.page-hero h1{font-size:28px}.page-title{font-size:24px}}

/* ══ TOOL CARDS (Homepage) ══ */
.tool-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:960px;margin:0 auto 48px;padding:0 24px}
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:24px 22px;text-decoration:none;color:var(--text);transition:all .2s;display:flex;flex-direction:column}
.tool-card:hover{border-color:var(--accent);transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.06);text-decoration:none}
html.dark .tool-card:hover{box-shadow:0 8px 24px rgba(0,0,0,.25)}
.tool-card-icon{width:40px;height:40px;border-radius:9px;background:var(--accent-soft);border:1px solid var(--accent-med);display:flex;align-items:center;justify-content:center;color:var(--accent);margin-bottom:14px}
.tool-card h3{font-size:15px;font-weight:700;margin-bottom:6px}
.tool-card p{font-size:13px;color:var(--text-secondary);line-height:1.5;flex:1}
.tool-card .card-link{margin-top:14px;font-size:12px;font-weight:700;color:var(--accent)}
@media(max-width:760px){.tool-cards{grid-template-columns:1fr;padding:0 16px;gap:12px}}
@media(min-width:761px) and (max-width:1000px){.tool-cards{grid-template-columns:repeat(2,1fr)}}

/* ══ GUIDE LINKS ══ */
.guide-links{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
.guide-link{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:14px 16px;text-decoration:none;color:var(--text);transition:all .15s}
.guide-link:hover{border-color:var(--accent);text-decoration:none}
.guide-link .gl-icon{width:34px;height:34px;border-radius:8px;background:var(--accent-soft);color:var(--accent);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.guide-link h4{font-size:13px;font-weight:700}.guide-link p{font-size:12px;color:var(--text-muted);margin:0;line-height:1.3}
@media(max-width:760px){.guide-links{grid-template-columns:1fr}}

/* ══ GUIDE BANNER (on tool pages) ══ */
.guide-banner{display:flex;align-items:center;gap:16px;background:var(--accent-soft);border:1px solid var(--accent-med);border-radius:12px;padding:18px 22px;margin-bottom:28px;text-decoration:none;color:var(--text);transition:all .2s}
.guide-banner:hover{border-color:var(--accent);transform:translateY(-1px);box-shadow:0 4px 16px rgba(37,99,235,.12);text-decoration:none}
html.dark .guide-banner:hover{box-shadow:0 4px 16px rgba(91,156,246,.15)}
.guide-banner-icon{width:44px;height:44px;border-radius:10px;background:var(--accent);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.guide-banner-text{flex:1}.guide-banner-text h3{font-size:15px;font-weight:700;margin-bottom:2px}
.guide-banner-text p{font-size:13px;color:var(--text-secondary);margin:0;line-height:1.45}
.guide-banner-arrow{color:var(--accent);font-size:20px;font-weight:700;flex-shrink:0;transition:transform .2s}
.guide-banner:hover .guide-banner-arrow{transform:translateX(3px)}
@media(max-width:640px){.guide-banner{flex-direction:column;text-align:center;gap:12px}.guide-banner-arrow{display:none}}

/* ══ CONTENT SECTIONS (Homepage) ══ */
.content-section{max-width:780px;margin:0 auto;padding:0 24px 48px}
.content-section h2{font-size:22px;font-weight:800;letter-spacing:-.4px;margin-bottom:14px}
.content-section p{font-size:15px;line-height:1.75;color:var(--text-secondary);margin-bottom:14px}
.content-section strong{color:var(--text)}
@media(max-width:760px){.content-section{padding:0 16px 36px}}

/* ══ ARTICLES ══ */
.article{max-width:680px}
.article h1{font-size:30px;font-weight:800;letter-spacing:-.6px;line-height:1.2;margin-bottom:10px}
.article .article-meta{font-size:13px;color:var(--text-muted);font-weight:500;margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--border)}
.article h2{font-size:21px;font-weight:700;margin-top:36px;margin-bottom:12px;letter-spacing:-.3px}
.article h3{font-size:17px;font-weight:700;margin-top:28px;margin-bottom:8px}
.article p{font-size:15px;line-height:1.75;color:var(--text-secondary);margin-bottom:16px}
.article strong{color:var(--text);font-weight:600}
.article ul,.article ol{margin:0 0 16px 24px;color:var(--text-secondary);font-size:15px;line-height:1.75}
.article li{margin-bottom:6px}
.article blockquote{border-left:3px solid var(--accent);margin:20px 0;padding:12px 20px;background:var(--accent-soft);border-radius:0 8px 8px 0;font-size:15px;color:var(--text-secondary)}
.article table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article th,.article td{padding:10px 14px;text-align:left;border-bottom:1px solid var(--border)}
.article th{font-weight:700;font-size:12px;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);background:var(--surface-raised)}
.article td{color:var(--text-secondary)}

/* ══ SHARED FORM ELEMENTS ══ */
.tool-card-wrap{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:background .3s,border-color .3s;margin-bottom:24px}
.tool-inner{padding:24px}
.tool-inner>label{display:block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:10px}
.input-row{display:flex;gap:8px}
.input-wrap{flex:1;position:relative}
.input-wrap label{position:absolute;top:-8px;left:14px;background:var(--surface);padding:0 6px;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);z-index:1}
.text-input{width:100%;background:var(--field-bg);border:1.5px solid var(--border);border-radius:var(--radius);padding:14px 16px;font-family:'JetBrains Mono',monospace;font-size:16px;letter-spacing:2.5px;color:var(--text);text-transform:uppercase;outline:none;transition:border-color .2s,box-shadow .2s,background .3s}
.text-input::placeholder{color:var(--text-muted);letter-spacing:.5px;font-size:13px;text-transform:none}
.text-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.btn-action{background:var(--accent);color:#fff;border:none;border-radius:var(--radius);padding:0 24px;height:48px;font-family:'Inter',sans-serif;font-weight:700;font-size:13px;cursor:pointer;display:inline-flex;align-items:center;gap:7px;transition:all .15s;white-space:nowrap;box-shadow:var(--shadow-btn)}
.btn-action:hover{filter:brightness(1.1);transform:translateY(-1px);box-shadow:var(--shadow-btn-hover)}
.btn-action:active{transform:translateY(0)}
.btn-action:disabled{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none}
.btn-secondary{background:var(--surface-raised);color:var(--text-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:0 20px;height:48px;font-family:'Inter',sans-serif;font-weight:600;font-size:13px;cursor:pointer;transition:all .15s}
.btn-secondary:hover{border-color:var(--text-muted);color:var(--text)}
.status-msg{text-align:center;padding:36px 20px;color:var(--text-secondary);font-size:14px}
.status-msg.error{color:var(--red)}
.spinner{display:inline-block;width:16px;height:16px;border:2.5px solid var(--border-light);border-top-color:var(--accent);border-radius:50%;animation:spin .65s linear infinite;margin-right:8px;vertical-align:middle}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
.result{animation:fadeUp .4s cubic-bezier(.16,1,.3,1)}

/* Source badge */
.source-badge{display:flex;align-items:center;gap:8px;padding:10px 16px;background:var(--surface-raised);border:1px solid var(--border);border-radius:8px;margin-top:16px;font-size:12px;color:var(--text-muted);font-weight:500;white-space:nowrap;overflow:hidden;transition:background .3s}
.source-badge svg{flex-shrink:0;color:var(--green)}.source-badge a{font-weight:700}
@media(max-width:640px){.source-badge{white-space:normal;font-size:11px}}

/* ══ VIN DECODER ══ */
.result-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:background .3s}
.result-card-body{padding:24px}
.result-ymm{font-size:26px;font-weight:800;letter-spacing:-.5px;line-height:1.2}
.result-trim{font-size:16px;font-weight:600;color:var(--text-muted);margin-top:3px}
.ev-tag{display:inline-block;background:var(--green-soft);color:var(--green);font-size:11px;font-weight:700;padding:3px 9px;border-radius:5px;margin-left:8px;vertical-align:middle}
.vin-row{display:flex;align-items:center;gap:14px;margin:16px 0 0;flex-wrap:wrap}
.vin-mono{font-family:'JetBrains Mono',monospace;font-size:15px;color:var(--text-secondary);letter-spacing:2.2px}
.vin-mono .vin-last8{font-weight:700;color:var(--text)}
.btn-nato{display:inline-flex;align-items:center;gap:6px;background:var(--surface-raised);border:1.5px solid var(--border);border-radius:8px;padding:7px 14px;font-family:'Inter',sans-serif;font-size:12px;font-weight:700;color:var(--text-secondary);cursor:pointer;transition:all .15s}
.btn-nato:hover,.btn-nato.active{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.btn-nato svg{flex-shrink:0}
.nato-panel{display:none;margin-top:16px;border-top:1px solid var(--border);padding-top:20px}
.nato-panel.show{display:block;animation:fadeUp .25s ease}
.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px;border-top:1px solid var(--border);padding-top:18px}
.stat-card{background:var(--surface-raised);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:3px 10px 10px 3px;padding:14px 18px 16px;transition:background .3s}
.stat-card-label{font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.5px;color:var(--accent);margin-bottom:7px;line-height:1}
.stat-card-value{font-size:17px;font-weight:600;color:var(--text);line-height:1.4}
.stat-card-value .data-sep{color:var(--text-muted);opacity:.3;margin:0 2px;font-weight:400}
.data-section-secondary{margin-top:16px;padding-top:2px}
.data-row{display:flex;align-items:baseline;gap:10px;padding:9px 0;border-bottom:1px solid var(--border);font-size:13px;opacity:.55}
.data-row:last-child{border-bottom:none}
.data-label{width:110px;flex-shrink:0;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--text-muted)}
.data-value{color:var(--text);font-weight:500;font-size:14px}
.data-value .data-sep{color:var(--text-muted);opacity:.35;margin:0 3px}
.result-footer{margin-top:12px;padding-top:14px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted);font-weight:500;display:flex;align-items:center;gap:8px;opacity:.65}
.result-footer svg{flex-shrink:0}
@media(max-width:640px){.stat-grid{grid-template-columns:1fr}.result-ymm{font-size:22px}.result-card-body{padding:18px}}

/* ══ NATO TILES ══ */
.nato-tiles{display:flex;flex-wrap:wrap;gap:5px;align-items:flex-start}
.nt{display:flex;flex-direction:column;align-items:center;justify-content:center;width:68px;height:82px;background:var(--tile-bg);border-radius:8px;padding:6px 4px 9px;animation:tileIn .25s cubic-bezier(.16,1,.3,1) both;transition:background .3s}
@keyframes tileIn{from{opacity:0;transform:scale(.85) translateY(6px)}to{opacity:1;transform:scale(1) translateY(0)}}
.nt-char{font-family:'JetBrains Mono',monospace;font-size:28px;font-weight:700;color:var(--tile-char);line-height:1}
.nt-word{font-family:'Inter',sans-serif;font-size:11px;font-weight:700;color:var(--tile-word);text-transform:uppercase;letter-spacing:.4px;margin-top:6px;line-height:1}
.nt.is-digit{background:var(--tile-digit-bg)}.nt.is-digit .nt-char{color:var(--tile-digit-char)}.nt.is-digit .nt-word{color:var(--tile-digit-word)}
.nt.inverted{background:var(--tile-inv-bg)}.nt.inverted .nt-char{color:var(--tile-inv-char)}.nt.inverted .nt-word{color:var(--tile-inv-word)}
.nt.inverted.is-digit{background:var(--tile-inv-digit-bg)}.nt.inverted.is-digit .nt-char{color:var(--tile-inv-digit-char)}.nt.inverted.is-digit .nt-word{color:var(--tile-inv-digit-word)}
.nt.is-unknown{background:var(--surface-raised);border:1.5px dashed var(--border)}.nt.is-unknown .nt-char{color:var(--text-muted);font-size:24px}.nt.is-unknown .nt-word{color:var(--text-muted)}
.nt-space{display:flex;align-items:center;justify-content:center;width:20px;height:82px;animation:tileIn .15s cubic-bezier(.16,1,.3,1) both}
.nt-space-line{width:1.5px;height:36px;background:var(--border);border-radius:1px;opacity:.6}
.vin-section-label{width:100%;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;color:var(--text-muted);padding:8px 0 4px}
.vin-section-label.vin-label-last8{font-size:11px;color:var(--accent);letter-spacing:1px}
.nato-tiles+.nato-tiles{margin-top:2px}
@media(max-width:640px){.nt{width:52px;height:66px;border-radius:6px}.nt-char{font-size:22px}.nt-word{font-size:9px;margin-top:4px}.nt-space{height:66px;width:14px}.nato-tiles{gap:4px}}

/* NATO converter specific */
.nato-textarea{width:100%;background:var(--field-bg);border:1.5px solid var(--border);border-radius:var(--radius);padding:14px 16px;font-family:'JetBrains Mono',monospace;font-size:16px;letter-spacing:2px;color:var(--text);text-transform:uppercase;outline:none;resize:none;height:52px;transition:border-color .2s,box-shadow .2s,background .3s}
.nato-textarea::placeholder{color:var(--text-muted);letter-spacing:.5px;font-size:14px;text-transform:none}
.nato-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.nato-output{background:var(--surface-raised);border:1px solid var(--border-light);border-radius:var(--radius);overflow:hidden}
.output-header{padding:14px 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}
.output-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted)}
.output-meta{display:flex;align-items:center;gap:12px}
.char-count{font-family:'JetBrains Mono',monospace;font-size:12px;color:var(--text-muted)}
.btn-copy{background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:5px 12px;font-family:'Inter',sans-serif;font-size:12px;font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all .15s;display:inline-flex;align-items:center;gap:5px}
.btn-copy:hover{border-color:var(--accent);color:var(--accent)}
.btn-copy.copied{border-color:var(--green);color:var(--green)}
.output-body{padding:20px 24px 24px;min-height:70px}
.output-empty{text-align:center;color:var(--text-muted);font-size:14px;padding:16px 0}
/* Ref grid */
.ref-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:background .3s}
.ref-header{padding:14px 18px;border-bottom:1px solid var(--border);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);display:flex;align-items:center;gap:8px}
.ref-header-arrow{margin-left:auto;transition:transform .2s}
.ref-card.open .ref-header-arrow{transform:rotate(180deg)}
.ref-body{padding:14px}
.ref-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:5px}
.ref-tile{display:flex;flex-direction:column;align-items:center;justify-content:center;width:72px;background:var(--tile-bg);border-radius:7px;padding:9px 2px 10px;transition:background .3s,transform .15s;cursor:default}
.ref-tile:hover{transform:scale(1.06)}
.ref-tile.highlight{outline:2px solid var(--accent);outline-offset:1px}
.ref-tile .rt-char{font-family:'JetBrains Mono',monospace;font-size:20px;font-weight:700;color:var(--tile-char);line-height:1}
.ref-tile .rt-word{font-family:'Inter',sans-serif;font-size:9px;font-weight:700;color:var(--tile-word);text-transform:uppercase;letter-spacing:.3px;margin-top:4px;line-height:1}

/* ══ MARGIN CALCULATOR ══ */
.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field-wrap{position:relative}
.field-wrap label{position:absolute;top:-8px;left:14px;background:var(--surface);padding:0 6px;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);pointer-events:none;z-index:1}
.field-wrap.is-computed label{color:var(--green)}
.field-input{width:100%;background:var(--field-bg);border:1.5px solid var(--border);border-radius:var(--radius);padding:15px 16px 15px 28px;font-family:'JetBrains Mono',monospace;font-size:16px;letter-spacing:.5px;color:var(--text);outline:none;transition:border-color .2s,box-shadow .2s,background .3s}
.field-input::placeholder{color:var(--text-muted);letter-spacing:0;font-size:13px}
.field-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.field-input.computed{border-color:var(--green);background:var(--green-soft)}
.field-input.computed:focus{box-shadow:0 0 0 3px var(--green-med);border-color:var(--green)}
.field-input::-webkit-inner-spin-button,.field-input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.field-input[type=number]{-moz-appearance:textfield}
.field-prefix{position:absolute;left:14px;top:50%;transform:translateY(-50%);font-family:'JetBrains Mono',monospace;font-size:15px;color:var(--text-muted);pointer-events:none;z-index:1}
.field-suffix{position:absolute;right:14px;top:50%;transform:translateY(-50%);font-family:'JetBrains Mono',monospace;font-size:15px;color:var(--text-muted);pointer-events:none;z-index:1}
.field-input.has-suffix{padding-right:32px;padding-left:16px}
.field-divider{grid-column:1/-1;display:flex;align-items:center;gap:12px;padding:4px 0}
.field-divider span{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);white-space:nowrap}
.field-divider::before,.field-divider::after{content:'';flex:1;height:1px;background:var(--border)}
.result-summary{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0;border-top:1px solid var(--border)}
.result-cell{padding:20px 24px;text-align:center;border-right:1px solid var(--border)}
.result-cell:last-child{border-right:none}
.result-cell-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);margin-bottom:6px}
.result-cell-value{font-family:'JetBrains Mono',monospace;font-size:22px;font-weight:700;letter-spacing:-.5px}
.result-cell-value.positive{color:var(--green)}.result-cell-value.negative{color:var(--red)}.result-cell-value.zero{color:var(--text-muted)}
.result-detail{border-top:1px solid var(--border);display:grid;grid-template-columns:1fr 1fr;gap:0}
.result-detail .data-row{opacity:1;padding:13px 24px;border-bottom:1px solid var(--border);border-right:1px solid var(--border)}
.result-detail .data-row:nth-child(even){border-right:none}
.result-detail .data-row:nth-last-child(1),.result-detail .data-row:nth-last-child(2){border-bottom:none}
.gp-hint{margin-top:18px;padding:14px 16px;background:var(--accent-soft);border:1px solid var(--accent-med);border-radius:8px;font-size:13px;color:var(--text-secondary);line-height:1.7}
.gp-hint strong{color:var(--accent)}
.gp-hint code{font-family:'JetBrains Mono',monospace;font-size:12px;background:var(--surface-raised);border:1px solid var(--border);padding:2px 7px;border-radius:4px;white-space:nowrap}
/* Mode tabs */
.mode-tabs{display:flex;border-bottom:1px solid var(--border)}
.mode-tab{flex:1;padding:14px;font-family:'Inter',sans-serif;font-size:13px;font-weight:700;color:var(--text-muted);background:var(--surface-raised);border:none;cursor:pointer;transition:all .15s;text-align:center}
.mode-tab:first-child{border-right:1px solid var(--border)}
.mode-tab.active{background:var(--surface);color:var(--accent)}
.mode-tab:hover:not(.active){color:var(--text-secondary)}
@media(max-width:640px){.field-grid{grid-template-columns:1fr}.result-summary{grid-template-columns:1fr}.result-cell{border-right:none;border-bottom:1px solid var(--border)}.result-cell:last-child{border-bottom:none}.result-detail{grid-template-columns:1fr}.result-detail .data-row{border-right:none}.result-detail .data-row:nth-last-child(2){border-bottom:1px solid var(--border)}.mode-tab{font-size:12px;padding:12px 8px}.input-row{flex-direction:column}.input-row .btn-action{justify-content:center}}

/* ══ FOOTER ══ */
.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:40px 24px;transition:background .3s}
.footer-inner{max-width:1100px;margin:0 auto;display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap}
.footer-col h4{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:14px}
.footer-col a{display:block;font-size:14px;color:var(--text-secondary);text-decoration:none;padding:4px 0;transition:color .15s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{max-width:1100px;margin:0 auto;padding-top:24px;margin-top:32px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
@media(max-width:760px){.footer-inner{flex-direction:column;gap:28px}.site-footer{padding:32px 16px}}

/* ══ AD CONTAINER ══ */
.ad-container{max-width:780px;margin:0 auto;padding:0 24px 32px}
@media(max-width:760px){.ad-container{padding:0 16px 24px}}