/* ============================================================
   calculadora-logaritmos.css — ed13
   Prefix: .log-   Page: 319
   Locked arch: data-block | btn-hidden individually | hero
   ============================================================ */
:root{--t:#0e7c86;--td:#0a5961;--tdk:#062e32;--g:#f2b544;--gl:#fef7e6;--tl:#e6f4f5;--w:#fff;--bg:#faf8f3;--bg2:#f2ede4;--m:#1f2933;--fi:#5b6570;--bd:#d8dee4;--fh:'Montserrat',sans-serif;--fb:'Inter',sans-serif;--r:.75rem;--rl:1.25rem}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
.pc-tool-hero{background:linear-gradient(135deg,#062e32 0%,#0a5961 55%,#0e7c86 100%);padding:3rem 1.5rem 2.5rem;position:relative;overflow:hidden}
.pc-tool-hero::after{content:'';position:absolute;width:18rem;height:18rem;border-radius:50%;background:rgba(242,181,68,.08);right:-5rem;top:-6rem;pointer-events:none}
.pc-tool-hero-inner{max-width:1100px;margin:0 auto;position:relative;z-index:1}
.pc-tool-tag{display:inline-flex;align-items:center;gap:.4rem;background:rgba(242,181,68,.18);border:1px solid rgba(242,181,68,.4);color:#fde68a;font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:.3rem .85rem;border-radius:999px;margin-bottom:.9rem}
.pc-tool-hero h1{font-size:clamp(1.4rem,3.5vw,2.2rem)!important;font-weight:900!important;color:#fff!important;line-height:1.12!important;letter-spacing:-.03em!important;margin-bottom:.75rem!important}
.pc-tool-hero-inner>p{color:rgba(255,255,255,.82);font-size:.97rem;max-width:640px;line-height:1.65;margin-bottom:1rem}
.pc-tool-pills{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.75rem}
.pc-tool-pills span{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:rgba(255,255,255,.88);font-size:.77rem;font-weight:600;padding:.28rem .8rem;border-radius:999px}
.tool-wrap{font-family:var(--fb);color:var(--m);max-width:1100px;margin:0 auto;padding:0 1rem 2rem}
.calc-section{background:var(--w);border:1px solid var(--bd);border-radius:var(--rl);padding:1.75rem 1.5rem;margin-bottom:1.5rem;box-shadow:0 2px 12px rgba(14,124,134,.06)}
.mode-tabs{display:flex;gap:.5rem;flex-wrap:wrap;margin-bottom:1.25rem}
.mode-tab{padding:.55rem 1.1rem;border-radius:var(--r);border:2px solid var(--bd);background:var(--bg);color:var(--fi);font-family:var(--fh);font-size:.8rem;font-weight:700;cursor:pointer;transition:all .2s}
.mode-tab:hover{border-color:var(--t);color:var(--t)}
.mode-tab.active{background:var(--t);border-color:var(--t);color:var(--w)}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;align-items:start}
@media(max-width:760px){.calc-grid{grid-template-columns:1fr}}
.input-panel,.results-panel{display:flex;flex-direction:column;gap:1rem}
.panel-title{font-family:var(--fh);font-size:.95rem;font-weight:800;color:var(--td);border-bottom:2px solid var(--tl);padding-bottom:.5rem}
.inp-row{display:grid;grid-template-columns:1fr 1fr;gap:.85rem}
.inp-group{display:flex;flex-direction:column;gap:.35rem}
.inp-group label{font-size:.78rem;font-weight:700;color:var(--td);font-family:var(--fh)}
.inp-group input,.inp-group select{padding:.65rem .85rem;border:1px solid var(--bd);border-radius:var(--r);font-size:.95rem;font-weight:700;background:var(--bg);color:var(--m);transition:border .2s}
.inp-group input:focus,.inp-group select:focus{outline:none;border-color:var(--t);background:var(--w)}
.inp-group small{font-size:.73rem;color:var(--fi);line-height:1.4}
/* Log expression display */
.log-expr-display{background:var(--bg);border:1px solid var(--bd);border-radius:var(--r);padding:.85rem 1.1rem;font-family:'Courier New',monospace;font-size:1.05rem;font-weight:700;color:var(--tdk);text-align:center;letter-spacing:.06em;margin-bottom:.75rem;min-height:2.8rem}
.log-expr-display sub,.log-expr-display sup{font-size:.7em}
/* Calc btn */
.calc-btn{width:100%;padding:.9rem;background:var(--t);color:var(--w);border:none;border-radius:var(--r);font-family:var(--fh);font-size:1rem;font-weight:800;cursor:pointer;transition:background .2s,transform .15s;margin-top:.5rem}
.calc-btn:hover{background:var(--td);transform:translateY(-1px)}
#log-error{display:none;background:#fee2e2;border:1px solid #fca5a5;border-radius:var(--r);padding:.6rem .9rem;font-size:.82rem;color:#991b1b;font-weight:600;margin-top:.25rem}
/* Results */
.results-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.75rem;min-height:180px;background:var(--bg);border:2px dashed var(--bd);border-radius:var(--r);text-align:center;padding:1.5rem}
.results-placeholder p{color:var(--fi);font-size:.875rem}
.res-box{background:linear-gradient(135deg,var(--tl),var(--w));border:1px solid var(--t);border-radius:var(--r);padding:1rem 1.15rem;margin-bottom:.75rem}
.res-header{font-family:var(--fh);font-size:.75rem;font-weight:800;color:var(--td);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.5rem}
.res-row{display:flex;align-items:baseline;justify-content:space-between;gap:.5rem;padding:.3rem 0;border-bottom:1px solid color-mix(in srgb,var(--bd) 60%,transparent)}
.res-row:last-child{border-bottom:none}
.res-label{font-size:.8rem;font-weight:600;color:var(--fi);flex-shrink:0;min-width:0}
.res-val{font-family:'Courier New',monospace;font-size:.95rem;font-weight:700;color:var(--tdk);text-align:right;word-break:break-word;overflow-wrap:break-word;flex:1;min-width:0}
.res-val.big{font-size:1.6rem;color:var(--t);font-family:var(--fh);font-weight:900}
/* Steps */
.log-steps{display:flex;flex-direction:column;gap:.4rem;margin:.5rem 0}
.log-step{background:var(--bg);border-left:3px solid var(--g);border-radius:0 var(--r) var(--r) 0;padding:.45rem .8rem;font-size:.8rem;font-family:'Courier New',monospace;color:var(--tdk);line-height:1.55}
.log-step-lbl{font-family:var(--fh);font-size:.67rem;font-weight:700;color:var(--td);text-transform:uppercase;letter-spacing:.05em;display:block;margin-bottom:.1rem}
/* All logs table */
.log-all-table{width:100%;border-collapse:collapse;margin:.5rem 0;font-size:.82rem}
.log-all-table th{background:var(--tdk);color:var(--w);font-family:var(--fh);font-size:.72rem;padding:.5rem .7rem;text-align:left}
.log-all-table td{padding:.4rem .7rem;border-bottom:1px solid var(--bd);font-family:'Courier New',monospace;font-weight:700;color:var(--tdk)}
.log-all-table tr:nth-child(even) td{background:var(--bg)}
.log-all-table tr.highlight td{background:var(--tl);color:var(--t)}
/* Action row */
.action-row{display:flex;gap:.65rem;flex-wrap:wrap;margin-top:.5rem}
.btn-pdf{align-items:center;gap:.45rem;padding:.65rem 1.1rem;background:var(--tdk);color:var(--w);border:none;border-radius:var(--r);font-family:var(--fh);font-size:.8rem;font-weight:700;cursor:pointer}
.btn-pdf:hover{background:#041f22}
.btn-wa{align-items:center;gap:.45rem;padding:.65rem 1.1rem;background:#25d366;color:var(--w);border:none;border-radius:var(--r);font-family:var(--fh);font-size:.8rem;font-weight:700;cursor:pointer}
.btn-wa:hover{background:#1da851}
.chart-wrapper{position:relative;width:100%;margin-top:.75rem}
.chart-wrapper canvas{border-radius:var(--r)}
.ad-container{width:100%;min-height:90px;background:var(--bg2);border-radius:var(--r);margin:1.25rem 0}
/* Content */
.content-section{margin-top:2rem;font-family:var(--fb);color:var(--m);line-height:1.8}
.content-section h2{font-family:var(--fh);font-size:1.3rem;font-weight:800;color:var(--tdk);margin:2.25rem 0 .9rem;border-left:4px solid var(--g);padding-left:.85rem}
.content-section h3{font-family:var(--fh);font-size:1.05rem;font-weight:700;color:var(--td);margin:1.5rem 0 .6rem}
.content-section h4{font-family:var(--fh);font-size:.95rem;font-weight:700;color:var(--t);margin:.75rem 0 .35rem}
.content-section p{margin-bottom:1rem;font-size:.95rem}
.content-section a{color:var(--t);text-decoration:underline}
.content-section a:hover{color:var(--td)}
.content-section ul,.content-section ol{padding-left:1.5rem;margin-bottom:1rem}
.content-section li{margin-bottom:.4rem;font-size:.95rem}
.content-section strong{color:var(--tdk)}
.example-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:1.25rem 0}
@media(max-width:600px){.example-grid{grid-template-columns:1fr}}
.ex-card{background:var(--w);border:1px solid var(--bd);border-radius:var(--r);padding:1.1rem 1.15rem;box-shadow:0 1px 6px rgba(14,124,134,.06)}
.ex-card h4{font-family:var(--fh);font-size:.88rem;font-weight:800;color:var(--td);margin-bottom:.5rem}
.ex-card p{font-size:.85rem;color:var(--fi);margin-bottom:.35rem}
.ex-card .ex-result{font-family:var(--fh);font-size:.95rem;font-weight:800;color:var(--t);background:var(--tl);padding:.35rem .7rem;border-radius:.4rem;display:inline-block;margin-top:.4rem}
.tip-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:1.25rem 0}
@media(max-width:700px){.tip-grid{grid-template-columns:1fr}}
.tip-card{background:var(--gl);border:1px solid color-mix(in srgb,var(--g) 40%,transparent);border-radius:var(--r);padding:1.1rem 1.15rem}
.tip-card h4{font-family:var(--fh);font-size:.88rem;font-weight:800;color:var(--tdk);margin-bottom:.5rem}
.tip-card p{font-size:.85rem;color:var(--fi);margin:0}
.faq-list{display:flex;flex-direction:column;gap:.5rem;margin:1rem 0}
details.faq-item{border:1px solid var(--bd);border-radius:var(--r);background:var(--w);overflow:hidden}
details.faq-item[open]{border-color:var(--t)}
summary.faq-q{padding:.9rem 1.1rem;font-family:var(--fh);font-size:.88rem;font-weight:700;color:var(--m);cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:.75rem}
summary.faq-q::after{content:'+';font-size:1.1rem;color:var(--t);flex-shrink:0;font-weight:800}
details.faq-item[open] summary.faq-q::after{content:'\2212'}
summary.faq-q:hover{color:var(--t)}
.faq-ans{padding:.5rem 1.1rem 1rem;font-size:.875rem;color:var(--fi);line-height:1.75;border-top:1px solid var(--bd)}
.faq-ans a{color:var(--t)}
.faq-ans strong{color:var(--tdk)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.85rem;margin-top:1rem}
@media(max-width:600px){.related-grid{grid-template-columns:1fr 1fr}}
.related-card{display:flex;align-items:center;gap:.75rem;padding:.9rem 1rem;background:var(--bg);border:1px solid var(--bd);border-radius:var(--r);text-decoration:none;color:var(--m);transition:border-color .2s,background .2s}
.related-card:hover{border-color:var(--t);background:var(--tl)}
.related-card .rc-icon{font-size:1.4rem;flex-shrink:0}
.related-card .rc-name{font-family:var(--fh);font-size:.82rem;font-weight:700;color:var(--td);line-height:1.3}
.disclaimer-section{background:var(--tdk);color:rgba(255,255,255,.7);padding:1.5rem 1.75rem;border-radius:var(--r);margin-top:2rem}
.disclaimer-section h2{font-family:var(--fh);font-size:.95rem;font-weight:700;color:rgba(255,255,255,.85);margin-bottom:.85rem;text-transform:uppercase;letter-spacing:.06em}
.disclaimer-section h3{font-family:var(--fh);font-size:.85rem;font-weight:700;color:rgba(255,255,255,.7);margin-top:1rem;margin-bottom:.4rem}
.disclaimer-section p{font-size:.8rem;line-height:1.7;margin-bottom:.6rem}
.disclaimer-section a{color:rgba(255,255,255,.65);text-decoration:underline}