/* ============================================================
   PeptideCalc Hub – Premium Design System v2
   Aesthetic: Scientific SaaS · Stripe/Linear-inspired
   Fonts: Sora (headings) + DM Sans (body)
   Palette: Deep Navy · Indigo · Teal · White
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@300;400;500;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&family=DM+Mono:wght@400;500&display=swap');

/* ─── TOKENS ─────────────────────────────────────────────── */
:root {
  --navy:        #0a0f1e;
  --navy-mid:    #111827;
  --navy-light:  #1a2235;
  --indigo:      #4f46e5;
  --indigo-dark: #3730a3;
  --indigo-glow: rgba(79,70,229,0.1);
  --teal:        #0d9488;
  --teal-light:  #14b8a6;
  --teal-glow:   rgba(13,148,136,0.1);
  --bg:          #f8fafc;
  --bg-card:     #ffffff;
  --border:      rgba(15,23,42,0.08);
  --border-card: rgba(15,23,42,0.06);
  --ink:         #0f172a;
  --ink-light:   #475569;
  --ink-muted:   #94a3b8;
  --r-sm:  8px;
  --r-md:  12px;
  --r-lg:  20px;
  --r-xl:  28px;
  --r-pill:100px;
  --shadow-xs: 0 1px 2px rgba(15,23,42,0.04);
  --shadow-sm: 0 2px 8px rgba(15,23,42,0.06),0 1px 2px rgba(15,23,42,0.04);
  --shadow-md: 0 8px 24px rgba(15,23,42,0.08),0 2px 8px rgba(15,23,42,0.04);
  --shadow-lg: 0 24px 48px rgba(15,23,42,0.12),0 8px 16px rgba(15,23,42,0.06);
  --shadow-indigo: 0 8px 32px rgba(79,70,229,0.25);
  --shadow-teal:   0 8px 32px rgba(13,148,136,0.2);
  --font-head: 'Sora', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --ease:        cubic-bezier(0.4,0,0.2,1);
  --ease-out:    cubic-bezier(0,0,0.2,1);
  --ease-spring: cubic-bezier(0.34,1.56,0.64,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font-body);font-size:16px;line-height:1.65;color:var(--ink);background:var(--bg);overflow-x:hidden}
a{color:var(--indigo);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{display:block}
h1,h2,h3,h4,h5,h6{font-family:var(--font-head);font-weight:700;line-height:1.2;color:var(--ink);letter-spacing:-0.02em}
h1{font-size:clamp(2rem,5vw,3.2rem)}
h2{font-size:clamp(1.4rem,3vw,2rem);margin-bottom:12px}
h3{font-size:1.2rem;margin-bottom:10px}
h4{font-size:1rem;font-weight:600}
p{color:var(--ink-light);line-height:1.75}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-sm{padding:56px 0}

/* ── HEADER ── */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,0.9);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px) saturate(180%);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:32px}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-head);font-weight:700;font-size:1.1rem;color:var(--ink);letter-spacing:-0.03em;text-decoration:none;flex-shrink:0}
.logo-icon{width:34px;height:34px;background:linear-gradient(135deg,var(--indigo),var(--teal));border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1rem;box-shadow:var(--shadow-indigo);flex-shrink:0}
.logo span{color:var(--indigo)}
.nav-links{display:flex;align-items:center;gap:2px;list-style:none}
.nav-links a{font-size:0.875rem;font-weight:500;color:var(--ink-light);padding:7px 14px;border-radius:var(--r-sm);transition:all .2s;text-decoration:none}
.nav-links a:hover,.nav-links a.active{color:var(--indigo);background:var(--indigo-glow)}
.nav-cta{background:var(--indigo)!important;color:white!important;border-radius:var(--r-sm)!important;font-weight:600!important;box-shadow:var(--shadow-indigo);transition:all .2s!important}
.nav-cta:hover{background:var(--indigo-dark)!important;transform:translateY(-1px);box-shadow:0 12px 28px rgba(79,70,229,0.35)!important}

/* ── MOBILE NAV ── */
.hamburger{display:none;background:none;border:1px solid var(--border);cursor:pointer;padding:8px;border-radius:var(--r-sm);flex-direction:column;gap:4px;transition:.2s}
.hamburger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}
.mobile-nav{display:none;position:fixed;inset:0;z-index:200;background:rgba(10,15,30,0.65);backdrop-filter:blur(4px)}
.mobile-nav.open{display:flex}
.mobile-nav-panel{position:absolute;right:0;top:0;bottom:0;width:min(340px,90vw);background:white;padding:24px;overflow-y:auto;box-shadow:var(--shadow-lg);animation:slideIn .28s var(--ease-out)}
@keyframes slideIn{from{transform:translateX(100%)}to{transform:translateX(0)}}
.mobile-nav-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}
.close-nav{background:none;border:1px solid var(--border);cursor:pointer;width:36px;height:36px;border-radius:var(--r-sm);font-size:1.1rem;color:var(--ink-light);display:flex;align-items:center;justify-content:center}
.mobile-nav-links{list-style:none;display:flex;flex-direction:column;gap:2px}
.mobile-nav-links a{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:var(--r-md);font-size:0.95rem;font-weight:500;color:var(--ink);text-decoration:none;transition:.15s}
.mobile-nav-links a:hover{background:var(--indigo-glow);color:var(--indigo)}
.section-label{display:block;font-size:0.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--ink-muted);padding:18px 14px 8px}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-body);font-weight:600;font-size:0.9rem;padding:12px 24px;border-radius:var(--r-md);border:none;cursor:pointer;transition:all .2s var(--ease);text-decoration:none;white-space:nowrap;letter-spacing:-0.01em}
.btn-primary{background:linear-gradient(135deg,var(--indigo),#6d28d9);color:white;box-shadow:var(--shadow-indigo)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(79,70,229,0.35);filter:brightness(1.05);text-decoration:none}
.btn-primary:active{transform:translateY(0)}
.btn-teal{background:linear-gradient(135deg,var(--teal),#0891b2);color:white;box-shadow:var(--shadow-teal)}
.btn-teal:hover{transform:translateY(-2px);filter:brightness(1.08);text-decoration:none}
.btn-outline{background:transparent;color:var(--indigo);border:1.5px solid rgba(79,70,229,0.3)}
.btn-outline:hover{background:var(--indigo-glow);border-color:var(--indigo);text-decoration:none}
.btn-ghost{background:var(--bg);color:var(--ink-light);border:1.5px solid var(--border)}
.btn-ghost:hover{background:white;border-color:rgba(15,23,42,0.15);color:var(--ink);text-decoration:none}
.btn-sm{padding:8px 16px;font-size:0.82rem}
.btn-lg{padding:16px 32px;font-size:1rem}
.btn-full{width:100%}

/* ── HERO ── */
.hero{background:var(--navy);position:relative;overflow:hidden;padding:96px 0 80px}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 20% 40%,rgba(79,70,229,0.28) 0%,transparent 70%),radial-gradient(ellipse 50% 60% at 80% 60%,rgba(13,148,136,0.22) 0%,transparent 70%)}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,0.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,0.025) 1px,transparent 1px);background-size:48px 48px}
.hero-content{position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(79,70,229,0.2);border:1px solid rgba(79,70,229,0.4);color:#a5b4fc;font-size:0.75rem;font-weight:600;letter-spacing:.07em;text-transform:uppercase;padding:6px 14px;border-radius:var(--r-pill);margin-bottom:24px}
.hero h1{color:white;font-size:clamp(2.2rem,5.5vw,3.8rem);font-weight:800;line-height:1.1;margin-bottom:20px;letter-spacing:-0.03em}
.gradient-text{background:linear-gradient(135deg,#818cf8,#34d399);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p.lead{font-size:1.05rem;color:#94a3b8;max-width:520px;margin-bottom:40px;line-height:1.75}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:56px}
.hero-layout{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}

/* ── HERO CALC ── */
.hero-calc{background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);border-radius:var(--r-xl);padding:32px;backdrop-filter:blur(20px);position:relative}
.hero-calc::before{content:'';position:absolute;inset:0;border-radius:var(--r-xl);background:linear-gradient(135deg,rgba(79,70,229,0.12),rgba(13,148,136,0.06));pointer-events:none}
.hero-calc-title{font-family:var(--font-head);font-size:0.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:#64748b;margin-bottom:20px}
.mini-input-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin-bottom:16px}
.mini-field label{font-size:0.68rem;font-weight:600;text-transform:uppercase;letter-spacing:.07em;color:#64748b;margin-bottom:6px;display:block}
.mini-field input{width:100%;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);color:white;font-family:var(--font-body);font-size:0.95rem;padding:10px 12px;border-radius:var(--r-sm);transition:.2s}
.mini-field input:focus{outline:none;border-color:rgba(129,140,248,0.6);background:rgba(255,255,255,0.12)}
.mini-field input::placeholder{color:rgba(255,255,255,0.22)}
.mini-result{background:rgba(13,148,136,0.15);border:1px solid rgba(13,148,136,0.3);border-radius:var(--r-md);padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:16px}
.mini-result-left{}
.mini-result-label{font-size:0.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:#34d399;margin-bottom:4px}
.mini-result-value{font-family:var(--font-head);font-size:2rem;font-weight:800;color:white;line-height:1}
.mini-result-sub{font-size:0.72rem;color:#64748b;margin-top:3px}
.mini-disclaimer{font-size:0.67rem;color:#475569;margin-top:12px;text-align:center;line-height:1.5}

/* ── TRUST BAR ── */
.trust-bar{display:flex;background:white;border:1px solid var(--border-card);border-radius:var(--r-xl);box-shadow:var(--shadow-sm);overflow:hidden}
.trust-item{flex:1;display:flex;align-items:center;gap:14px;padding:22px 24px;border-right:1px solid var(--border)}
.trust-item:last-child{border-right:none}
.trust-icon{font-size:1.4rem;flex-shrink:0}
.trust-text strong{display:block;font-size:1rem;font-weight:700;color:var(--ink);font-family:var(--font-head)}
.trust-text span{font-size:0.76rem;color:var(--ink-muted)}

/* ── CALC CARDS GRID ── */
.calc-cards-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.calc-card-link{display:block;background:white;border:1px solid var(--border-card);border-radius:var(--r-xl);padding:28px 24px;text-decoration:none;transition:all .25s var(--ease);position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}
.calc-card-link::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:3px 3px 0 0;opacity:0;transition:opacity .25s}
.calc-card-link:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none}
.calc-card-link:hover::before{opacity:1}
.cc-indigo::before{background:linear-gradient(90deg,var(--indigo),#818cf8)}
.cc-teal::before{background:linear-gradient(90deg,var(--teal),var(--teal-light))}
.cc-purple::before{background:linear-gradient(90deg,#7c3aed,#a78bfa)}
.cc-blue::before{background:linear-gradient(90deg,#2563eb,#38bdf8)}
.calc-card-icon{width:48px;height:48px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:16px}
.calc-card-link h3{font-size:0.95rem;color:var(--ink);margin-bottom:8px}
.calc-card-link p{font-size:0.8rem;color:var(--ink-muted);line-height:1.55;margin-bottom:16px}
.calc-arrow{font-size:0.8rem;font-weight:600;display:flex;align-items:center;gap:4px;transition:gap .2s}
.calc-card-link:hover .calc-arrow{gap:8px}

/* ── SECTION HEADERS ── */
.section-eyebrow{font-size:0.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--indigo);margin-bottom:10px}
.section-title{font-family:var(--font-head);margin-bottom:14px}
.section-desc{color:var(--ink-light);max-width:560px;font-size:1rem}
.section-header-center{text-align:center}
.section-header-center .section-desc{margin:0 auto}

/* ── CALC PAGE ── */
.calc-page{padding:0 0 100px}
.calc-page-layout{display:grid;grid-template-columns:1fr 340px;gap:40px;align-items:start;padding-top:40px}

/* ── PAGE HERO ── */
.page-hero{background:linear-gradient(135deg,var(--navy) 0%,#1e1b4b 100%);position:relative;overflow:hidden;padding:52px 0 44px}
.page-hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 70% 80% at 80% 50%,rgba(79,70,229,0.22) 0%,transparent 70%)}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{color:white;font-size:clamp(1.8rem,4vw,2.5rem);margin-bottom:10px}
.page-hero .lead{color:#94a3b8;font-size:0.95rem;max-width:580px}
.page-hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.12);color:#a5b4fc;font-size:0.7rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:5px 12px;border-radius:var(--r-pill);margin-bottom:16px}

/* ── CALCULATOR CARD ── */
.calc-card{background:white;border:1px solid var(--border-card);border-radius:var(--r-xl);padding:36px;box-shadow:var(--shadow-md);position:relative;overflow:hidden}
.calc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--indigo),var(--teal))}
.calc-disclaimer{display:flex;gap:10px;align-items:flex-start;background:#fefce8;border:1px solid #fde68a;border-radius:var(--r-md);padding:14px 16px;margin-bottom:28px;font-size:0.8rem;color:#92400e;line-height:1.5}

/* ── FORMS ── */
.form-group{margin-bottom:22px}
.form-label{display:block;font-size:0.84rem;font-weight:600;color:var(--ink);margin-bottom:8px;letter-spacing:-0.01em}
.input-wrapper{position:relative;display:flex;align-items:center}
.form-input,.form-select{width:100%;font-family:var(--font-body);font-size:0.97rem;font-weight:500;color:var(--ink);background:var(--bg);border:1.5px solid var(--border);border-radius:var(--r-md);padding:13px 68px 13px 16px;transition:all .2s;appearance:none}
.form-input:focus,.form-select:focus{outline:none;border-color:var(--indigo);background:white;box-shadow:0 0 0 3px rgba(79,70,229,0.1)}
.form-input.error{border-color:#ef4444;box-shadow:0 0 0 3px rgba(239,68,68,0.1)}
.form-input::placeholder{color:var(--ink-muted);font-weight:400}
.unit-badge{position:absolute;right:12px;font-size:0.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--ink-muted);background:white;border:1px solid var(--border);padding:4px 10px;border-radius:var(--r-sm);pointer-events:none}
.form-hint{font-size:0.77rem;color:var(--ink-muted);margin-top:6px}
.form-error{font-size:0.77rem;color:#ef4444;margin-top:6px;font-weight:500}
.form-select-wrap{position:relative}
.form-select-wrap::after{content:'▾';position:absolute;right:16px;top:50%;transform:translateY(-50%);pointer-events:none;color:var(--ink-muted)}
.form-select{padding:13px 44px 13px 16px;cursor:pointer}

/* ── CALC ACTIONS ── */
.calc-actions{display:flex;gap:12px;margin-top:4px}
.calc-actions .btn-primary{flex:2}
.calc-actions .btn-ghost{flex:1}

/* ── RESULT SECTION ── */
.result-section{margin-top:32px;display:none;animation:fadeSlideUp .4s var(--ease-out) both}
.result-section.visible{display:block}
@keyframes fadeSlideUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:16px}
.result-card{background:linear-gradient(135deg,#f0f7ff,#e8f0fe);border:1px solid rgba(79,70,229,0.12);border-radius:var(--r-lg);padding:20px}
.result-card.primary{background:linear-gradient(135deg,var(--indigo),#5b21b6);border-color:transparent;grid-column:span 2}
.result-label{font-size:0.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:#6366f1;margin-bottom:6px}
.result-card.primary .result-label{color:rgba(255,255,255,0.6)}
.result-value{font-family:var(--font-head);font-size:2.4rem;font-weight:800;color:var(--ink);line-height:1;letter-spacing:-0.03em}
.result-card.primary .result-value{color:white}
.result-sub{font-size:0.8rem;color:var(--ink-muted);margin-top:4px}
.result-card.primary .result-sub{color:rgba(255,255,255,0.5)}
.pulse{animation:pulse .6s var(--ease-out)}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(79,70,229,0.4)}100%{box-shadow:0 0 0 24px rgba(79,70,229,0)}}

/* ── SYRINGE VIZ ── */
.syringe-section{background:linear-gradient(135deg,#f8fafc,#f1f5f9);border:1px solid var(--border);border-radius:var(--r-xl);padding:28px 32px;margin-top:18px;display:none;animation:fadeSlideUp .5s .1s var(--ease-out) both}
.syringe-section.visible{display:block}
.syringe-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;flex-wrap:wrap;gap:8px}
.syringe-title{font-size:0.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-muted)}
.syringe-amount{font-family:var(--font-head);font-size:1.05rem;font-weight:700;color:var(--indigo)}
.syringe-svg-wrap{display:flex;justify-content:center;padding:8px 0}

/* ── RESULT ACTIONS ── */
.result-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}

/* ── STEPS ACCORDION ── */
.steps-accordion{margin-top:18px;border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden}
.steps-toggle{width:100%;display:flex;align-items:center;justify-content:space-between;padding:15px 20px;background:white;border:none;cursor:pointer;font-family:var(--font-body);font-size:0.87rem;font-weight:600;color:var(--ink);transition:.2s}
.steps-toggle:hover{background:var(--bg)}
.steps-chevron{font-size:0.65rem;transition:transform .25s;color:var(--ink-muted)}
.steps-accordion.open .steps-chevron{transform:rotate(180deg)}
.steps-body{max-height:0;overflow:hidden;transition:max-height .35s var(--ease);background:var(--bg)}
.steps-accordion.open .steps-body{max-height:400px}
.steps-body-inner{padding:20px}
.steps-body ol{padding-left:20px;display:flex;flex-direction:column;gap:10px}
.steps-body li{font-size:0.87rem;color:var(--ink-light);line-height:1.65}
.steps-body li strong{color:var(--ink)}

/* ── MODE TABS ── */
.mode-tabs{display:flex;gap:4px;background:var(--bg);border:1px solid var(--border);border-radius:var(--r-md);padding:4px;margin-bottom:28px}
.mode-tab{flex:1;padding:9px 16px;border:none;border-radius:var(--r-sm);font-family:var(--font-body);font-size:0.84rem;font-weight:500;color:var(--ink-muted);background:transparent;cursor:pointer;transition:all .2s}
.mode-tab.active{background:white;color:var(--indigo);font-weight:600;box-shadow:var(--shadow-xs)}

/* ── FORMULA ── */
.formula-section{margin-top:48px}
.formula-card{background:var(--navy-mid,#111827);border:1px solid rgba(255,255,255,0.06);border-radius:var(--r-lg);padding:24px 28px;margin-bottom:14px}
.formula-label{font-size:0.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--teal-light);margin-bottom:10px}
.formula-card code{font-family:var(--font-mono);font-size:0.92rem;color:#e2e8f0;line-height:1.7;display:block;white-space:pre-wrap}

/* ── REFERENCE TABLE ── */
.ref-table-wrap{overflow-x:auto;margin:20px 0;border-radius:var(--r-lg);border:1px solid var(--border);box-shadow:var(--shadow-xs)}
.ref-table{width:100%;border-collapse:collapse;font-size:0.875rem}
.ref-table thead tr{background:var(--navy);color:#e2e8f0}
.ref-table thead th{padding:14px 18px;text-align:left;font-size:0.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;border:none}
.ref-table tbody tr{border-bottom:1px solid var(--border);transition:background .15s}
.ref-table tbody tr:last-child{border-bottom:none}
.ref-table tbody tr:hover{background:rgba(79,70,229,0.025)}
.ref-table tbody td{padding:13px 18px;color:var(--ink-light)}
.ref-table tbody td:first-child{font-weight:600;color:var(--ink)}

/* ── FAQ ── */
.faq-section{margin-top:56px}
.faq-section>h2{margin-bottom:24px}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:first-of-type{border-top:1px solid var(--border)}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 4px;background:none;border:none;cursor:pointer;font-family:var(--font-body);font-size:0.95rem;font-weight:600;color:var(--ink);text-align:left;transition:color .2s}
.faq-question:hover{color:var(--indigo)}
.faq-icon{width:28px;height:28px;border-radius:var(--r-pill);border:1.5px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:1rem;font-weight:300;flex-shrink:0;color:var(--ink-muted);transition:all .2s}
.faq-item.open .faq-icon{background:var(--indigo);border-color:var(--indigo);color:white;transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s var(--ease)}
.faq-answer-inner{padding:0 4px 20px;color:var(--ink-light);font-size:0.9rem;line-height:1.75}

/* ── RELATED TOOLS ── */
.related-tools{margin-top:56px}
.related-tools h3{margin-bottom:20px}
.tools-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.tool-card{display:flex;align-items:center;gap:14px;background:white;border:1.5px solid var(--border);border-radius:var(--r-lg);padding:18px 20px;text-decoration:none;transition:all .2s var(--ease)}
.tool-card:hover{border-color:rgba(79,70,229,0.3);box-shadow:var(--shadow-md);transform:translateY(-2px);text-decoration:none}
.tool-icon{width:44px;height:44px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0;background:var(--bg)}
.tool-card-name{display:block;font-size:0.87rem;font-weight:600;color:var(--ink);margin-bottom:2px}
.tool-card-desc{display:block;font-size:0.76rem;color:var(--ink-muted)}

/* ── SIDEBAR ── */
.sidebar-widget{background:white;border:1px solid var(--border-card);border-radius:var(--r-xl);padding:24px;margin-bottom:18px;box-shadow:var(--shadow-xs)}
.sidebar-widget h4{font-size:0.76rem;font-weight:700;color:var(--ink);text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}
.sidebar-links{list-style:none;display:flex;flex-direction:column;gap:2px}
.sidebar-links a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--r-sm);font-size:0.84rem;font-weight:500;color:var(--ink-light);text-decoration:none;transition:.15s}
.sidebar-links a:hover{background:var(--indigo-glow);color:var(--indigo)}
.ad-slot{background:linear-gradient(135deg,#f8fafc,#f1f5f9);border:1.5px dashed rgba(15,23,42,0.1);border-radius:var(--r-xl);display:flex;align-items:center;justify-content:center;font-size:0.7rem;color:var(--ink-muted);text-transform:uppercase;letter-spacing:.08em;margin-bottom:18px}
.ad-slot-sidebar{height:250px}
.disclaimer-widget{background:linear-gradient(135deg,#fefce8,#fef9c3);border:1px solid #fde68a;border-radius:var(--r-xl);padding:20px;margin-bottom:18px}
.disclaimer-widget h4{font-size:0.78rem;color:#92400e;margin-bottom:8px}
.disclaimer-widget p{font-size:0.77rem;color:#a16207;margin:0;line-height:1.6}

/* ── BREADCRUMB ── */
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:0.78rem;color:var(--ink-muted);padding:16px 0;flex-wrap:wrap}
.breadcrumb a{color:var(--ink-muted);text-decoration:none}
.breadcrumb a:hover{color:var(--indigo)}
.breadcrumb-sep{color:var(--border);font-size:0.7rem}

/* ── BLOG ── */
.blog-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.blog-card{background:white;border:1px solid var(--border-card);border-radius:var(--r-xl);overflow:hidden;transition:all .25s var(--ease);box-shadow:var(--shadow-sm)}
.blog-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.blog-card-img{height:180px;display:flex;align-items:center;justify-content:center;font-size:3rem}
.blog-card-body{padding:28px}
.blog-tag{display:inline-flex;align-items:center;gap:4px;background:rgba(79,70,229,0.08);color:var(--indigo);font-size:0.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;padding:4px 12px;border-radius:var(--r-pill);margin-bottom:12px}
.blog-card h3{font-size:1.05rem;color:var(--ink);margin-bottom:10px}
.blog-card h3 a{color:inherit;text-decoration:none}
.blog-card h3 a:hover{color:var(--indigo)}
.blog-meta{font-size:0.74rem;color:var(--ink-muted);display:flex;gap:14px;flex-wrap:wrap}

/* ── ARTICLE ── */
.article-body h2{margin:48px 0 16px}
.article-body h3{margin:32px 0 12px}
.article-body p{margin-bottom:18px}
.article-body ul,.article-body ol{padding-left:24px;margin-bottom:18px}
.article-body li{margin-bottom:10px;color:var(--ink-light);line-height:1.7}
.article-toc{background:linear-gradient(135deg,#f0f7ff,#e8f0fe);border:1px solid rgba(79,70,229,0.15);border-radius:var(--r-xl);padding:28px 32px;margin-bottom:40px}
.article-toc h4{font-size:0.74rem;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--indigo);margin-bottom:14px}
.article-toc ol{padding-left:20px}
.article-toc li{margin-bottom:8px;font-size:0.88rem}
.article-toc a{color:var(--indigo)}
.article-meta{display:flex;gap:20px;flex-wrap:wrap;font-size:0.8rem;color:var(--ink-muted);margin-top:14px}
.article-header{padding-bottom:32px}

/* ── FEATURES GRID ── */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:white;border:1px solid var(--border-card);border-radius:var(--r-xl);padding:32px 28px;transition:all .25s var(--ease);box-shadow:var(--shadow-sm)}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.feature-icon{width:52px;height:52px;border-radius:var(--r-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:18px}

/* ── PAGE HERO LIGHT ── */
.page-hero-light{background:white;border-bottom:1px solid var(--border);padding:56px 0 48px}
.page-hero-light h1{font-size:clamp(1.8rem,4vw,2.5rem);margin-bottom:10px}
.page-hero-light .lead{color:var(--ink-light);font-size:1rem;max-width:560px}

/* ── TOAST ── */
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--navy);color:white;font-size:0.85rem;font-weight:600;padding:12px 24px;border-radius:var(--r-pill);box-shadow:var(--shadow-lg);transition:transform .3s var(--ease-spring),opacity .3s;z-index:9999;opacity:0;white-space:nowrap}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}

/* ── FOOTER ── */
.site-footer{background:var(--navy);color:#64748b;margin-top:100px;position:relative;overflow:hidden}
.site-footer::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,rgba(79,70,229,0.5),rgba(13,148,136,0.4),transparent)}
.footer-top{padding:72px 0 56px;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:56px}
.footer-brand .logo{color:white}
.footer-brand p{font-size:0.83rem;color:#475569;line-height:1.75;margin-top:16px;max-width:240px}
.footer-col h4{font-family:var(--font-head);font-size:0.76rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:#94a3b8;margin-bottom:18px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-col a{color:#475569;font-size:0.87rem;text-decoration:none;transition:color .2s}
.footer-col a:hover{color:#e2e8f0}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.05);padding:24px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.footer-disclaimer{font-size:0.74rem;max-width:580px;line-height:1.7;color:#374151}
.footer-copy{font-size:0.76rem;color:#374151;white-space:nowrap}

/* ── RESPONSIVE ── */
@media(max-width:1024px){
  .hero-layout{grid-template-columns:1fr}
  .hero-calc{max-width:520px}
  .calc-cards-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
  .features-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-links{display:none}
  .hamburger{display:flex}
  .hero{padding:64px 0 48px}
  .mini-input-row{grid-template-columns:1fr}
  .calc-page-layout{grid-template-columns:1fr}
  .calc-sidebar{order:-1}
  .result-grid{grid-template-columns:1fr}
  .result-card.primary{grid-column:span 1}
  .blog-grid{grid-template-columns:1fr}
  .tools-grid{grid-template-columns:1fr}
  .trust-bar{flex-direction:column;border-radius:var(--r-xl)}
  .trust-item{border-right:none;border-bottom:1px solid var(--border)}
  .trust-item:last-child{border-bottom:none}
  .features-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
  .calc-cards-grid{grid-template-columns:1fr 1fr}
  .section{padding:56px 0}
  .calc-card{padding:24px 20px}
  .page-hero{padding:40px 0 36px}
  .result-value{font-size:1.9rem}
}
@media(max-width:480px){
  .calc-cards-grid{grid-template-columns:1fr}
  .calc-actions{flex-direction:column}
  .hero-actions{flex-direction:column}
  h1{font-size:1.9rem}
  .result-value{font-size:1.6rem}
}