/* ============================================================
   ProCalcTools.com — Production CSS v3.0 — UNIFIED
   Single source of truth for ALL 25 pages
   ============================================================ */

:root {
  --primary: #1557a0;
  --primary-dark: #0e3f78;
  --primary-light: #e8f2fb;
  --primary-mid: #2d7dd2;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --text: #111827;
  --text-mid: #374151;
  --text-soft: #6b7280;
  --text-light: #9ca3af;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-card: #ffffff;
  --border: #e5e7eb;
  --border-focus: #1557a0;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.07),0 1px 2px rgba(0,0,0,0.06);
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
  --font: 'DM Sans','Segoe UI',system-ui,sans-serif;
  --max-w: 1200px;
  --t: 0.18s ease;
}

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--primary-dark)}
button{font-family:var(--font)}
ul,ol{padding-left:1.4em}

/* ── Layout ── */
.container{max-width:var(--max-w);margin:0 auto;padding:0 16px}
@media(min-width:640px){.container{padding:0 24px}}
.section{padding:56px 0}
.section-alt{background:var(--bg-alt)}

/* ── Skip Link ── */
.skip-link{position:absolute;top:-40px;left:6px;background:var(--primary);color:#fff;padding:8px 14px;border-radius:var(--radius);font-size:.85rem;font-weight:700;z-index:9999;transition:top .2s}
.skip-link:focus{top:6px}

/* ════════════════════════════════════
   HEADER & NAV — Unified for all pages
   ════════════════════════════════════ */
header{background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:200;box-shadow:0 1px 4px rgba(0,0,0,.05)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px}

/* Logo — works whether it contains SVG or just text */
.logo{display:flex;align-items:center;gap:8px;font-size:1.25rem;font-weight:800;color:var(--primary);letter-spacing:-.025em;flex-shrink:0;text-decoration:none}
.logo:hover{color:var(--primary-dark)}
.logo svg{width:28px;height:28px;flex-shrink:0}
.logo span{color:var(--accent)}
/* Footer logo override */
footer .logo{color:#fff}
footer .logo span{color:var(--accent)}

/* Nav — plain <nav> structure used on all original pages */
nav{display:none;align-items:center;gap:2px}
@media(min-width:768px){nav{display:flex}}
nav a{padding:7px 12px;border-radius:var(--radius);font-size:.88rem;font-weight:600;color:var(--text-mid);transition:all var(--t)}
nav a:hover,nav a.active{background:var(--primary-light);color:var(--primary)}
.nav-cta{background:var(--primary)!important;color:#fff!important;padding:7px 16px!important;border-radius:var(--radius)!important}
.nav-cta:hover{background:var(--primary-dark)!important}

/* Hamburger */
.hamburger{display:flex;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px;margin-left:auto}
@media(min-width:768px){.hamburger{display:none}}
.hamburger span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all var(--t)}
/* Hamburger → X animation when open */
.hamburger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.is-open span:nth-child(2){opacity:0;transform:scaleX(0)}
.hamburger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}


/* Mobile nav open state */
nav.open{display:flex;flex-direction:column;position:absolute;top:60px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);padding:12px 16px;box-shadow:var(--shadow);z-index:200}
nav.open a{padding:10px 14px;border-radius:var(--radius)}

/* ── Hero ── */
.hero{background:linear-gradient(135deg,#dbeafe 0%,#eff6ff 45%,#fef9ec 100%);padding:64px 0 52px;text-align:center}
.hero h1{font-size:clamp(1.9rem,5vw,3rem);font-weight:800;color:var(--text);line-height:1.18;margin-bottom:14px;letter-spacing:-.035em}
.hero h1 em{color:var(--primary);font-style:normal}
.hero>div>p{font-size:1.08rem;color:var(--text-mid);max-width:580px;margin:0 auto 28px;line-height:1.7}
.badge{display:inline-flex;align-items:center;gap:6px;background:var(--primary-light);color:var(--primary);font-size:.72rem;font-weight:700;padding:4px 12px;border-radius:20px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px}
.hero-search{display:flex;max-width:500px;margin:0 auto 32px;background:#fff;border:2px solid var(--border);border-radius:50px;overflow:visible;box-shadow:var(--shadow);transition:border-color var(--t);position:relative}
.hero-search:focus-within{border-color:var(--primary)}
.hero-search input{flex:1;border:none;outline:none;padding:13px 18px;font-size:.97rem;font-family:var(--font);color:var(--text);background:transparent;min-width:0}
.hero-search button{background:var(--primary);border:none;padding:13px 22px;color:#fff;font-weight:700;cursor:pointer;font-size:.9rem;transition:background var(--t);border-radius:0 50px 50px 0;white-space:nowrap}
.hero-search button:hover{background:var(--primary-dark)}
.hero-stats{display:flex;justify-content:center;gap:32px;flex-wrap:wrap}
.stat{text-align:center}
.stat strong{display:block;font-size:1.7rem;font-weight:800;color:var(--primary);line-height:1}
.stat span{font-size:.8rem;color:var(--text-soft);margin-top:3px;display:block}

/* ── Section Title ── */
.section-title{text-align:center;margin-bottom:36px}
.section-title h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:800;letter-spacing:-.03em}
.section-title p{color:var(--text-soft);margin-top:8px;font-size:.95rem}

/* ── Category Cards ── */
.category-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:600px){.category-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:900px){.category-grid{grid-template-columns:repeat(3,1fr)}}
.category-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:all var(--t);display:block;color:inherit}
.category-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px);border-color:var(--primary)}
.category-icon{width:48px;height:48px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:14px;font-size:1.5rem}
.category-icon.finance{background:#dbeafe}
.category-icon.health{background:#dcfce7}
.category-icon.utility{background:#fef9c3}
.category-card h3{font-size:1.08rem;font-weight:700;margin-bottom:7px}
.category-card>p{color:var(--text-soft);font-size:.88rem;margin-bottom:14px;line-height:1.55}
.tool-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:5px}
.tool-list li a{display:flex;align-items:center;gap:7px;font-size:.85rem;color:var(--text-mid);padding:3px 0;transition:color var(--t)}
.tool-list li a:hover{color:var(--primary)}
.tool-list li a::before{content:'→';color:var(--primary);font-size:.78rem;flex-shrink:0}

/* ── Tools Grid ── */
.tools-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
@media(min-width:600px){.tools-grid{grid-template-columns:repeat(3,1fr)}}
@media(min-width:900px){.tools-grid{grid-template-columns:repeat(4,1fr)}}
.tool-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--radius);padding:16px;transition:all var(--t);text-decoration:none;display:flex;flex-direction:column;gap:6px;color:inherit}
.tool-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-2px)}
.tool-card-icon{font-size:1.4rem;line-height:1}
.tool-card h4{font-size:.9rem;font-weight:700;color:var(--text)}
.tool-card p{font-size:.78rem;color:var(--text-soft);line-height:1.4}

/* ── Calculator Layout ── */
.calc-wrapper{display:grid;grid-template-columns:1fr;gap:28px;margin-top:28px}
@media(min-width:960px){.calc-wrapper{grid-template-columns:1fr 360px}}
.calc-box{background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm)}
.calc-box h2{font-size:1.15rem;font-weight:700;margin-bottom:22px;color:var(--text)}

/* ── Forms ── */
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:.8rem;font-weight:700;color:var(--text-soft);margin-bottom:6px;text-transform:uppercase;letter-spacing:.05em}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:10px 13px;border:1.5px solid var(--border);border-radius:var(--radius);font-size:.97rem;font-family:var(--font);color:var(--text);background:var(--bg);transition:border-color var(--t);outline:none;appearance:auto}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px rgba(21,87,160,.1)}
.form-group textarea{resize:vertical;min-height:110px}
.input-prefix{position:relative}
.input-prefix span{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-soft);font-weight:600;pointer-events:none;font-size:.95rem}
.input-prefix input{padding-left:26px}
.input-suffix{position:relative}
.input-suffix span{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--text-soft);font-weight:600;pointer-events:none;font-size:.88rem}
.input-suffix input{padding-right:42px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:480px){.form-row{grid-template-columns:1fr}}
.form-hint{font-size:.76rem;color:var(--text-light);margin-top:4px}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:var(--radius);font-size:.95rem;font-weight:700;cursor:pointer;transition:all var(--t);font-family:var(--font);letter-spacing:.005em}
.btn-primary{background:var(--primary);color:#fff;width:100%}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 4px 14px rgba(21,87,160,.28)}
.btn-secondary{background:var(--bg-alt);color:var(--text-mid);border:1.5px solid var(--border);margin-top:8px;width:100%}
.btn-secondary:hover{background:var(--border)}
.btn-sm{padding:8px 16px;font-size:.85rem}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}

/* ── Results ── */
.results-box{background:var(--primary-light);border:1.5px solid #bfdbfe;border-radius:var(--radius-lg);padding:24px}
.results-box h3{font-size:.8rem;font-weight:800;color:var(--primary);text-transform:uppercase;letter-spacing:.07em;margin-bottom:16px}
.result-item{display:flex;justify-content:space-between;align-items:center;padding:10px 0;border-bottom:1px solid #bfdbfe}
.result-item:last-child{border-bottom:none}
.result-item .label{font-size:.84rem;color:var(--text-mid);font-weight:500}
.result-item .value{font-size:1rem;font-weight:700;color:var(--text)}
.result-item.highlight .value{font-size:1.35rem;color:var(--primary)}
.result-item.highlight .label{font-weight:700;color:var(--text)}
.copy-btn{background:none;border:1px solid var(--border);border-radius:6px;padding:4px 10px;font-size:.75rem;cursor:pointer;color:var(--text-soft);transition:all var(--t);margin-top:12px;font-family:var(--font)}
.copy-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ── Breadcrumb ── */
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:.8rem;color:var(--text-soft);padding:14px 0;flex-wrap:wrap}
.breadcrumb a{color:var(--text-soft);transition:color var(--t)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb span{color:var(--text-light)}
/* Also support <ol> breadcrumb style */
.breadcrumb ol{display:flex;align-items:center;gap:6px;list-style:none;padding:0;flex-wrap:wrap}
.breadcrumb li{display:flex;align-items:center;gap:6px}
.breadcrumb li+li::before{content:'›';color:var(--text-light)}

/* ── Page Header ── */
.page-header{background:linear-gradient(135deg,var(--primary-light) 0%,#eff6ff 100%);padding:40px 0 32px}
.page-header h1{font-size:clamp(1.5rem,4vw,2.4rem);font-weight:800;letter-spacing:-.03em;line-height:1.2}
.page-header p{font-size:1rem;color:var(--text-mid);margin-top:9px;max-width:620px;line-height:1.65}

/* ── Content Body ── */
.content-body{max-width:820px}
.content-body h2{font-size:1.4rem;font-weight:800;margin:36px 0 12px;color:var(--text);letter-spacing:-.02em}
.content-body h3{font-size:1.1rem;font-weight:700;margin:26px 0 9px}
.content-body p{margin-bottom:14px;color:var(--text-mid);font-size:.95rem;line-height:1.75}
.content-body ul,.content-body ol{margin:10px 0 18px;color:var(--text-mid);font-size:.95rem}
.content-body li{margin-bottom:6px;line-height:1.65}
.content-body strong{color:var(--text);font-weight:700}

/* ── How to Use Box ── */
.how-to-box{background:var(--bg-alt);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:24px;margin:24px 0}
.how-to-box h3{font-size:1rem;font-weight:700;margin-bottom:14px;color:var(--text)}
.how-to-steps{list-style:none;padding:0;display:flex;flex-direction:column;gap:10px}
.how-to-steps li{display:flex;gap:12px;align-items:flex-start;font-size:.9rem;color:var(--text-mid)}
.step-num{background:var(--primary);color:#fff;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.75rem;font-weight:800;flex-shrink:0;margin-top:1px}

/* ── FAQ ── */
.faq{margin-top:40px}
.faq>h2{font-size:1.5rem;font-weight:800;margin-bottom:20px;letter-spacing:-.02em}
.faq-item{border:1.5px solid var(--border);border-radius:var(--radius);margin-bottom:10px;overflow:hidden}
.faq-q{width:100%;background:none;border:none;padding:16px 18px;text-align:left;font-size:.92rem;font-weight:600;color:var(--text);cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:var(--font);transition:background var(--t);gap:12px}
.faq-q:hover{background:var(--bg-alt)}
.faq-q .icon{font-size:1.1rem;color:var(--primary);transition:transform var(--t);flex-shrink:0}
.faq-q.open .icon{transform:rotate(45deg)}
.faq-a{display:none;padding:0 18px 16px;color:var(--text-mid);font-size:.9rem;line-height:1.75}
.faq-a.open{display:block}

/* ── Ad Zones ── */
.ad-zone{background:var(--bg-alt);border:1.5px dashed var(--border);border-radius:var(--radius);text-align:center;color:var(--text-light);font-size:.78rem;display:flex;align-items:center;justify-content:center;margin:20px 0}
.ad-zone.leaderboard{min-height:90px}
.ad-zone.rectangle{min-height:250px}
.ad-zone.sidebar{min-height:250px}
.ad-zone.in-article{min-height:280px}

/* ── Blog ── */
.blog-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:600px){.blog-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:900px){.blog-grid{grid-template-columns:repeat(3,1fr)}}
.blog-card{background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--t);text-decoration:none;display:block;color:inherit}
.blog-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}
.blog-card-img{height:140px;background:linear-gradient(135deg,var(--primary-light),#dbeafe);display:flex;align-items:center;justify-content:center;font-size:2.8rem}
.blog-card-body{padding:18px}
.blog-card-tag{display:inline-block;background:var(--primary-light);color:var(--primary);font-size:.7rem;font-weight:700;padding:3px 9px;border-radius:20px;text-transform:uppercase;letter-spacing:.05em;margin-bottom:8px}
.blog-card h3{font-size:.95rem;font-weight:700;margin-bottom:7px;line-height:1.4}
.blog-card p{font-size:.83rem;color:var(--text-soft);margin-bottom:10px;line-height:1.5}
.blog-card-meta{font-size:.77rem;color:var(--text-light)}

/* Blog index page */
.blog-layout{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:900px){.blog-layout{grid-template-columns:1fr 300px}}
.blog-sidebar{display:flex;flex-direction:column;gap:0}
.blog-cat-title{font-size:1.1rem;font-weight:800;margin:32px 0 18px;letter-spacing:-.02em}
.blog-cat-title:first-child{margin-top:0}
.blog-cat-tag{display:inline-block;font-size:.68rem;font-weight:700;padding:3px 9px;border-radius:20px;text-transform:uppercase;letter-spacing:.05em;margin-right:8px}
.blog-cat-tag.finance{background:var(--primary-light);color:var(--primary)}
.blog-cat-tag.health{background:#dcfce7;color:#15803d}
.read-time{color:var(--text-light);font-size:.75rem}
.blog-read-more{display:inline-block;margin-top:10px;font-size:.84rem;font-weight:600;color:var(--primary)}
.blog-read-more:hover{color:var(--primary-dark)}

/* Blog article page */
.article-layout{display:grid;grid-template-columns:1fr;gap:32px;margin:24px 0 60px}
@media(min-width:960px){.article-layout{grid-template-columns:1fr 300px}}
.article-main{}
.article-header{margin-bottom:28px}
.article-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:14px;font-size:.8rem;color:var(--text-soft)}
.article-header h1{font-size:clamp(1.5rem,3.5vw,2.2rem);font-weight:800;letter-spacing:-.03em;line-height:1.22;margin-bottom:12px}
.article-lead{font-size:1.05rem;color:var(--text-mid);line-height:1.7;border-left:3px solid var(--primary);padding-left:16px}
.article-cta-box{background:var(--primary-light);border:1.5px solid #bfdbfe;border-radius:var(--radius-lg);padding:20px;margin:24px 0}
.article-cta-box strong{display:block;font-size:.95rem;font-weight:700;margin-bottom:6px}
.article-cta-box p{font-size:.88rem;color:var(--text-mid);margin:0}
.article-sidebar{display:flex;flex-direction:column;gap:18px}
.article-section{margin-bottom:28px}
.article-section h2{font-size:1.3rem;font-weight:800;margin:32px 0 12px;letter-spacing:-.025em}
.article-section h3{font-size:1.05rem;font-weight:700;margin:22px 0 9px}
.article-section p{font-size:.93rem;color:var(--text-mid);line-height:1.78;margin-bottom:13px}
.article-section ul,.article-section ol{font-size:.93rem;color:var(--text-mid);line-height:1.78;margin-bottom:13px;padding-left:1.6em}
.article-section li{margin-bottom:6px}
.article-section strong{color:var(--text)}

/* ── Page Hero Simple (blog index) ── */
.page-hero-simple{text-align:center;padding:48px 0 32px}
.page-hero-simple h1{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:800;letter-spacing:-.03em;margin-bottom:10px}
.page-hero-simple p{color:var(--text-soft);font-size:.97rem;max-width:520px;margin:0 auto}

/* ── Sidebar Widgets ── */
.sidebar-widget{background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:18px}
.sidebar-widget h3{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--text-light);margin-bottom:12px}
.related-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:7px}
.related-list a{font-size:.87rem;color:var(--text-mid);display:flex;align-items:center;gap:7px;transition:color var(--t)}
.related-list a:hover{color:var(--primary)}
.related-list a::before{content:'📌';font-size:.75rem;flex-shrink:0}
.popular-tools-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}
.popular-tools-list a{font-size:.87rem;color:var(--text-mid);transition:color var(--t)}
.popular-tools-list a:hover{color:var(--primary)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.topic-tag{display:inline-block;background:var(--bg-alt);border:1.5px solid var(--border);border-radius:20px;padding:4px 12px;font-size:.78rem;font-weight:600;color:var(--text-mid);transition:all var(--t)}
.topic-tag:hover{background:var(--primary-light);color:var(--primary);border-color:var(--primary)}

/* Related tools sidebar box */
.related-tools{background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:20px;margin-bottom:18px}
.related-tools h3{font-size:.78rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--text-light);margin-bottom:12px}
.related-tools ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}
.related-tools ul a{font-size:.87rem;color:var(--text-mid);display:flex;align-items:center;gap:8px;transition:color var(--t)}
.related-tools ul a:hover{color:var(--primary)}
.trust-box{background:var(--bg-alt);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:18px;margin-bottom:18px}
.trust-box h4{font-size:.8rem;font-weight:800;text-transform:uppercase;letter-spacing:.06em;color:var(--text-light);margin-bottom:10px}
.trust-box ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:7px;font-size:.85rem;color:var(--text-mid)}

/* ── Tables ── */
.table-responsive{overflow-x:auto;margin-top:20px;border-radius:var(--radius);border:1.5px solid var(--border)}
table{width:100%;border-collapse:collapse;font-size:.85rem}
thead th{background:var(--primary);color:#fff;padding:10px 13px;text-align:left;white-space:nowrap;font-weight:700;font-size:.8rem}
tbody tr:nth-child(even){background:var(--bg-alt)}
tbody td{padding:9px 13px;border-bottom:1px solid var(--border)}
tbody tr:last-child td{border-bottom:none}

/* Quick ref & tip guide tables */
.tip-guide-table{border:1.5px solid var(--border);border-radius:var(--radius);overflow:hidden;margin:16px 0}
.tip-guide-row{display:grid;grid-template-columns:2fr 1fr 1fr;gap:0;font-size:.85rem}
.tip-guide-row.header{background:var(--primary);color:#fff;font-weight:700;font-size:.8rem}
.tip-guide-row span{padding:10px 13px;border-bottom:1px solid var(--border)}
.tip-guide-row:last-child span{border-bottom:none}
.tip-guide-row:nth-child(even):not(.header){background:var(--bg-alt)}
.quick-ref-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:14px 0}
@media(min-width:600px){.quick-ref-grid{grid-template-columns:repeat(3,1fr)}}
.quick-ref-item{background:var(--bg-alt);border:1.5px solid var(--border);border-radius:var(--radius);padding:10px 13px;font-size:.84rem;color:var(--text-mid)}
.quick-ref-item strong{color:var(--primary)}

/* ── Trust Bar ── */
.trust-bar{background:var(--bg-alt);border:1.5px solid var(--border);border-radius:var(--radius);padding:14px 20px;display:flex;align-items:center;justify-content:center;gap:28px;flex-wrap:wrap;margin:20px 0}
.trust-item{display:flex;align-items:center;gap:6px;font-size:.8rem;color:var(--text-mid);font-weight:600}
.trust-item span{font-size:.95rem}

/* ── Features Grid ── */
.features-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:500px){.features-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:900px){.features-grid{grid-template-columns:repeat(3,1fr)}}
.feature-item{display:flex;gap:12px;align-items:flex-start}
.feature-icon{font-size:1.5rem;flex-shrink:0;line-height:1.2}
.feature-item h4{font-size:.92rem;font-weight:700;margin-bottom:4px}
.feature-item p{font-size:.83rem;color:var(--text-soft);line-height:1.55}

/* ── CTA Section ── */
.cta-section{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-mid) 100%);color:#fff;padding:56px 0;text-align:center}
.cta-section h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:800;margin-bottom:12px;letter-spacing:-.025em}
.cta-section p{font-size:1rem;opacity:.88;margin-bottom:24px;max-width:500px;margin-left:auto;margin-right:auto}
.cta-btn{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--primary);padding:14px 28px;border-radius:50px;font-weight:800;font-size:1rem;transition:all var(--t)}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2);color:var(--primary-dark)}

/* ── Footer ── */
footer{background:#0f172a;color:#94a3b8;padding:56px 0 0;margin-top:72px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:40px}
@media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(min-width:900px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}}
.footer-brand p{font-size:.85rem;line-height:1.72;max-width:270px;color:#94a3b8;margin-top:10px}
.footer-links h4,.footer-col h4{color:#f1f5f9;font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.07em;margin-bottom:14px}
.footer-links ul,.footer-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:8px}
.footer-links ul a,.footer-col ul a{font-size:.85rem;color:#94a3b8;transition:color var(--t)}
.footer-links ul a:hover,.footer-col ul a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1e293b;padding:18px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:.78rem}
.footer-bottom-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom-links a{color:#94a3b8;transition:color var(--t)}
.footer-bottom-links a:hover{color:#fff}
.footer-legal{display:flex;gap:18px;flex-wrap:wrap;list-style:none;padding:0}
.footer-legal a{color:#94a3b8;transition:color var(--t)}
.footer-legal a:hover{color:#fff}
.footer-disclaimer{font-size:.72rem;color:#64748b;margin-top:8px;line-height:1.5}

/* ── Static Pages (privacy, terms, contact, 404) ── */
.static-page{max-width:780px;margin:48px auto 80px;padding:0}
.static-page h1{font-size:clamp(1.6rem,4vw,2.2rem);font-weight:800;letter-spacing:-.03em;margin-bottom:8px}
.last-updated{font-size:.82rem;color:var(--text-light);margin-bottom:32px}
.static-page h2{font-size:1.15rem;font-weight:800;margin:28px 0 10px}
.static-page h3{font-size:1rem;font-weight:700;margin:20px 0 8px}
.static-page p{font-size:.92rem;color:var(--text-mid);line-height:1.78;margin-bottom:13px}
.static-page ul,.static-page ol{font-size:.92rem;color:var(--text-mid);line-height:1.78;margin:8px 0 16px;padding-left:1.6em}
.static-page li{margin-bottom:5px}
.contact-grid{display:grid;grid-template-columns:1fr;gap:28px;margin-top:20px}
@media(min-width:760px){.contact-grid{grid-template-columns:1fr 1fr}}
.contact-form-wrap{}
.contact-page .calc-box{background:var(--bg);border:1.5px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm)}
.contact-page .form-group textarea{min-height:120px}
.inline-result{background:#dcfce7;border:1.5px solid #86efac;border-radius:var(--radius);padding:12px 16px;font-size:.88rem;color:#15803d;margin-top:14px}

/* Error/404 page */
.error-page{max-width:960px;margin:48px auto 80px}
.error-hero{text-align:center;padding:40px 0 32px}
.error-code{font-size:6rem;font-weight:800;color:var(--primary);line-height:1;letter-spacing:-.05em;opacity:.15}
.error-hero h1{font-size:1.8rem;font-weight:800;margin:-20px 0 12px;letter-spacing:-.03em}
.error-hero p{color:var(--text-soft);max-width:460px;margin:0 auto 24px;font-size:.95rem}
.error-tools-grid h2{font-size:1.1rem;font-weight:800;margin-bottom:4px}

/* ── Error States ── */
.error-msg{background:#fef2f2;border:1.5px solid #fecaca;border-radius:var(--radius);padding:12px 16px;font-size:.87rem;color:#991b1b;margin:10px 0;display:none}

/* ── Unit Toggle ── */
.unit-toggle{display:flex;gap:10px;margin-bottom:18px;flex-wrap:wrap}
.unit-toggle label{display:flex;align-items:center;gap:7px;cursor:pointer;font-weight:600;font-size:.87rem;color:var(--text-mid)}
.unit-toggle label:hover{color:var(--primary)}

/* ── BMI Scale ── */
.bmi-scale{display:flex;height:20px;border-radius:10px;overflow:hidden;margin:14px 0 6px}
.bmi-scale div{flex:1}
.bmi-scale .under{background:#3b82f6}
.bmi-scale .normal{background:#22c55e;flex:2}
.bmi-scale .over{background:#f59e0b}
.bmi-scale .obese{background:#ef4444}
.bmi-labels{display:flex;justify-content:space-between;font-size:.72rem;color:var(--text-light);margin-bottom:14px}
.bmi-categories{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:16px}
.bmi-cat-item{padding:10px;border-radius:var(--radius);font-size:.82rem}
.bmi-cat-item strong{display:block;font-size:.88rem;margin-bottom:2px}
.bmi-cat-under{background:#dbeafe;color:#1d4ed8}
.bmi-cat-normal{background:#dcfce7;color:#15803d}
.bmi-cat-over{background:#fef3c7;color:#92400e}
.bmi-cat-obese{background:#fee2e2;color:#991b1b}

/* ── Amortization Toggle ── */
.toggle-amort{background:none;border:1.5px solid var(--border);border-radius:var(--radius);padding:9px 16px;cursor:pointer;font-size:.85rem;font-weight:600;color:var(--text-mid);transition:all var(--t);font-family:var(--font);margin-top:14px}
.toggle-amort:hover{border-color:var(--primary);color:var(--primary)}

/* ── Pie Chart ── */
.pie-chart-container{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin:14px 0}
.pie-legend{display:flex;flex-direction:column;gap:7px;min-width:140px}
.pie-legend-item{display:flex;align-items:center;gap:8px;font-size:.82rem}
.pie-dot{width:10px;height:10px;border-radius:50%;flex-shrink:0}

/* ── Disclaimer small ── */
.disclaimer-small{font-size:.75rem;color:var(--text-light);margin-top:12px;line-height:1.55;font-style:italic}


/* ── Category Card — div version (fixes nested <a> browser bug) ── */
.category-card{cursor:default}
.card-title-link{color:var(--text);font-weight:700;text-decoration:none;display:block}
.card-title-link:hover{color:var(--primary)}
.category-card:hover .card-title-link{color:var(--primary)}

/* ── Print ── */
@media print{
  header,footer,.ad-zone,nav,.hamburger{display:none}
  .calc-wrapper{grid-template-columns:1fr}
  body{font-size:12pt}
}

/* ── Accessibility ── */
:focus-visible{outline:2px solid var(--primary);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ════════════════════════════════════════════════════════════
   MOBILE-FIRST OVERRIDES — Complete mobile optimization
   Target: 360px–480px phones (most common in USA 2025)
   ════════════════════════════════════════════════════════════ */

/* ── Base mobile improvements ── */
@media(max-width:767px){

  /* Prevent iOS auto-zoom on input focus (font-size must be ≥16px) */
  .form-group input,
  .form-group select,
  .form-group textarea{font-size:16px}

  /* Larger touch targets — minimum 44×44px (Apple HIG / WCAG 2.5.5) */
  nav a,.nav-cta,
  .btn,.btn-primary,.btn-secondary,.btn-outline,
  .faq-q,
  .tool-card,
  .hamburger{min-height:44px}
  .hamburger{padding:10px;gap:6px}
  .hamburger span{width:24px;height:2.5px}

  /* ── Hero — tighter on phone ── */
  .hero{padding:36px 0 32px}
  .hero h1{font-size:clamp(1.6rem,7vw,2.2rem);line-height:1.22}
  .hero>div>p{font-size:.97rem;margin-bottom:20px;padding:0 4px}
  .badge{font-size:.68rem}

  /* Search bar — full width, pill shape still works */
  .hero-search{max-width:100%;margin:0 0 24px;border-radius:12px}
  .hero-search input{padding:14px 14px;font-size:16px;border-radius:12px 0 0 12px}
  .hero-search button{padding:14px 18px;font-size:.88rem;border-radius:0 12px 12px 0}

  /* Stats row — 2×2 grid on phone */
  .hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px;text-align:center;padding:0 8px}
  .stat strong{font-size:1.5rem}
  .stat span{font-size:.75rem}

  /* ── Section spacing — tighter ── */
  .section{padding:36px 0}
  .section-title{margin-bottom:24px}
  .section-title h2{font-size:1.35rem}

  /* ── Category cards — single column, no icon shrink ── */
  .category-grid{grid-template-columns:1fr;gap:14px}
  .category-card{padding:18px}
  .category-icon{width:42px;height:42px;font-size:1.3rem;margin-bottom:10px}
  .category-card h3{font-size:1rem}
  .category-card>p{font-size:.85rem;margin-bottom:10px}
  .tool-list li a{font-size:.85rem;padding:5px 0}/* bigger tap area */

  /* ── Tools grid — 2 columns on phone ── */
  .tools-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .tool-card{padding:14px}
  .tool-card-icon{font-size:1.25rem}
  .tool-card h4{font-size:.85rem}
  .tool-card p{font-size:.74rem}

  /* ── Calculator pages ── */
  .calc-box{padding:18px}
  .calc-box h2{font-size:1rem;margin-bottom:16px}
  .form-row{grid-template-columns:1fr}/* Always single col on phone */
  .form-group{margin-bottom:14px}
  .form-group label{font-size:.78rem}

  /* Buttons — full width, big enough to tap */
  .btn,.btn-primary{font-size:.95rem;padding:14px 20px}
  .btn-secondary{font-size:.88rem;padding:12px 16px}

  /* Results box */
  .results-box{padding:16px}
  .result-item .label{font-size:.82rem}
  .result-item .value{font-size:.95rem}
  .result-item.highlight .value{font-size:1.2rem}

  /* ── Page header ── */
  .page-header{padding:24px 0 20px}
  .page-header h1{font-size:clamp(1.35rem,6vw,1.8rem)}
  .page-header p{font-size:.92rem}

  /* ── Breadcrumb — smaller ── */
  .breadcrumb{font-size:.75rem;padding:10px 0}

  /* ── Content body ── */
  .content-body h2{font-size:1.2rem;margin:28px 0 10px}
  .content-body h3{font-size:1rem}
  .content-body p{font-size:.9rem;line-height:1.72}

  /* ── How-to box ── */
  .how-to-box{padding:16px}
  .how-to-steps li{font-size:.87rem}

  /* ── FAQ ── */
  .faq-q{font-size:.88rem;padding:14px 14px}
  .faq-a{padding:0 14px 14px;font-size:.87rem}

  /* ── Features ── */
  .features-grid{grid-template-columns:1fr;gap:16px}
  .feature-item p{font-size:.82rem}

  /* ── Blog cards ── */
  .blog-grid{grid-template-columns:1fr;gap:14px}
  .blog-card-img{height:110px;font-size:2.2rem}
  .blog-card-body{padding:14px}
  .blog-card h3{font-size:.9rem}
  .blog-card p{font-size:.8rem}
  .blog-layout{grid-template-columns:1fr}
  .blog-sidebar{display:none}/* Hide sidebar on phone — not enough space */

  /* ── Article ── */
  .article-layout{grid-template-columns:1fr;gap:0}
  .article-sidebar{display:none}
  .article-header h1{font-size:1.4rem;line-height:1.25}
  .article-lead{font-size:.95rem;padding-left:12px}
  .article-section h2{font-size:1.1rem}
  .article-section p,.article-section li{font-size:.9rem}
  .article-cta-box{padding:16px}

  /* ── CTA section ── */
  .cta-section{padding:36px 0}
  .cta-section h2{font-size:1.35rem}
  .cta-section p{font-size:.93rem}
  .cta-btn{padding:13px 22px;font-size:.92rem}

  /* ── Footer ── */
  footer{padding:36px 0 0;margin-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-brand p{max-width:100%;font-size:.83rem}
  .footer-col ul{gap:10px}/* Bigger tap spacing */
  .footer-col ul a{font-size:.85rem;padding:2px 0}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;padding:16px 0}
  .footer-bottom-links{gap:14px;flex-wrap:wrap}
  .footer-bottom-links a,.footer-legal a{font-size:.78rem;padding:3px 0}

  /* ── Sidebar widgets — full width on mobile ── */
  .sidebar-widget,.related-tools,.trust-box{margin-bottom:14px}

  /* ── Tables — horizontal scroll ── */
  .table-responsive{margin:12px -16px;border-radius:0;border-left:none;border-right:none}
  .tip-guide-table{margin:12px -16px;border-radius:0;overflow-x:auto}
  .tip-guide-row{font-size:.8rem}
  .tip-guide-row span{padding:9px 10px}
  table{font-size:.8rem}
  thead th{padding:9px 10px;font-size:.75rem}
  tbody td{padding:8px 10px}

  /* ── Quick ref ── */
  .quick-ref-grid{grid-template-columns:1fr 1fr}
  .quick-ref-item{font-size:.8rem;padding:9px 10px}

  /* ── Pie chart ── */
  .pie-chart-container{flex-direction:column;align-items:flex-start;gap:14px}
  .pie-legend{min-width:0}

  /* ── Ad zones — full width ── */
  .ad-zone.leaderboard{min-height:60px}/* Mobile banner is shorter */
  .ad-zone.sidebar{display:none}/* No sidebar on mobile */

  /* ── Static pages ── */
  .static-page{margin:24px auto 48px}
  .static-page h1{font-size:1.5rem}
  .contact-grid{grid-template-columns:1fr}

  /* ── Error page ── */
  .error-code{font-size:4rem}
  .error-hero h1{font-size:1.4rem}

  /* ── BMI categories — 2 col already fine, just spacing ── */
  .bmi-cat-item{padding:9px}

  /* ── Unit converter ── */
  .unit-converter-row{grid-template-columns:1fr}
  .converter-swap{text-align:center;margin:4px 0}

  /* ── GPA course row ── */
  .course-row{grid-template-columns:1fr 1fr}
}

/* ── Small phones (360px) extra tweaks ── */
@media(max-width:380px){
  .container{padding:0 12px}
  .hero h1{font-size:1.5rem}
  .hero-search button{padding:14px 12px;font-size:.82rem}
  .tools-grid{grid-template-columns:1fr}/* Single col on tiny phones */
  .tool-card{flex-direction:row;align-items:center;gap:12px;padding:13px}
  .tool-card-icon{font-size:1.4rem;flex-shrink:0}
  .stat strong{font-size:1.35rem}
}

/* ── Tablet (768px–959px) tweaks ── */
@media(min-width:768px) and (max-width:959px){
  .calc-wrapper{grid-template-columns:1fr}/* Stack on tablet too */
  .article-layout{grid-template-columns:1fr}
  .article-sidebar{display:none}
  .hero h1{font-size:2.2rem}
  .tools-grid{grid-template-columns:repeat(3,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}

/* ── Touch device improvements (all touch screens) ── */
@media(hover:none) and (pointer:coarse){
  /* Remove hover transforms — they don't make sense on touch */
  .category-card:hover,
  .tool-card:hover,
  .blog-card:hover,
  .blog-preview-card:hover{transform:none}
  
  /* Larger tap area for FAQ */
  .faq-q{padding:16px 16px}
  
  /* Remove :hover background flicker on nav */
  nav a:hover{background:transparent;color:var(--text-mid)}
  nav a.active{background:var(--primary-light);color:var(--primary)}

  /* Smooth scroll momentum on iOS */
  .table-responsive,
  .tip-guide-table{-webkit-overflow-scrolling:touch}
}

/* ════════════════════════════════════════
   COMPACT MOBILE FOOTER — Accordion style
   ════════════════════════════════════════ */

/* Desktop footer shows normally */
.footer-desktop{display:grid;grid-template-columns:1fr;gap:32px;padding-bottom:40px}
@media(min-width:640px){.footer-desktop{grid-template-columns:1fr 1fr}}
@media(min-width:900px){.footer-desktop{grid-template-columns:2fr 1fr 1fr 1fr}}

/* Mobile footer — hidden on desktop */
.footer-mobile{display:none}

/* ── Mobile footer styles ── */
@media(max-width:767px){
  /* Hide desktop footer, show mobile version */
  .footer-desktop{display:none}
  .footer-mobile{display:block;padding:20px 0 4px}

  footer{padding:20px 0 0;margin-top:40px}

  .footer-mobile-brand{margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid #1e293b}
  .footer-mobile-brand .logo{display:flex;align-items:center;gap:7px}

  /* Accordion */
  .footer-accordion{border-top:1px solid #1e293b}
  .footer-acc-item{border-bottom:1px solid #1e293b}

  .footer-acc-btn{
    width:100%;background:none;border:none;
    padding:14px 0;
    display:flex;justify-content:space-between;align-items:center;
    color:#f1f5f9;font-size:.9rem;font-weight:700;
    cursor:pointer;font-family:var(--font);
    letter-spacing:.01em;
    min-height:48px;/* good tap target */
  }
  .footer-acc-btn span{
    color:#94a3b8;font-size:1.1rem;font-weight:400;
    transition:transform .2s;
    display:inline-block;
  }
  .footer-acc-btn[aria-expanded="true"] span{transform:rotate(45deg)}
  .footer-acc-btn[aria-expanded="true"]{color:#fff}

  .footer-acc-body{
    display:none;
    flex-direction:column;gap:0;
    padding-bottom:8px;
  }
  .footer-acc-body.open{display:flex}
  .footer-acc-body a{
    color:#94a3b8;font-size:.88rem;
    padding:9px 0;
    border-bottom:1px solid #1e293b20;
    transition:color .15s;
  }
  .footer-acc-body a:last-child{border-bottom:none}
  .footer-acc-body a:hover{color:#fff}

  /* Footer bottom — stacked */
  .footer-bottom{
    flex-direction:column;align-items:flex-start;
    gap:8px;padding:14px 0 20px;
    font-size:.75rem;
    border-top:1px solid #1e293b;
  }
  .footer-bottom-links{gap:16px}
  .footer-bottom-links a{font-size:.75rem;color:#94a3b8;padding:2px 0}
}