/* ================================================================
   RESET + CSS CUSTOM PROPERTIES (Estética VRS Sovereign)
================================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --bg-void: #000000; --bg-surface: rgba(13, 15, 24, 0.4); --bg-panel: rgba(18, 20, 29, 0.6);
    --cyan: #00e5ff; --cyan-glow: rgba(0, 229, 255, 0.35); --cyan-border: rgba(0, 229, 255, 0.18);
    --amber: #ffca28; --amber-glow: rgba(255, 202, 40, 0.35);
    --red: #ff5252; --red-glow: rgba(255, 82, 82, 0.35);
    --green: #69ff47;
    --white: #eef2ff; --white-soft: #c8d0e0; --muted: #5a6478; --muted-bright: #8892a4;
    --border: rgba(0, 229, 255, 0.12);
    --font-sans: 'Inter', system-ui, sans-serif; --font-mono: 'Fira Code', monospace;
    --radius: 14px; --radius-sm: 8px; --t: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
body { background-color: var(--bg-void); color: var(--white); font-family: var(--font-sans); line-height: 1.6; }
body { background: radial-gradient(circle at 50% -20%, #0d1522 0%, var(--bg-void) 70%); }
body::after {
    content: ''; position: fixed; inset: 0; z-index: -1; pointer-events: none;
    background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 40px 40px;
}
.container { max-width: 1600px; width: 92vw; margin: 0 auto; padding: 0 20px; }

/* Navigation */
.nav { padding: 14px 0; background: rgba(9,10,15,.82); backdrop-filter: blur(24px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.logo-text { font-size: 1.15rem; font-weight: 800; color: var(--white); }
.logo-text .a { color: var(--cyan); }

/* Hero Section */
#hero { padding: 80px 0 40px; text-align: center; }
.label-tag { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: .68rem; font-weight: 500; letter-spacing: .18em; text-transform: uppercase; color: var(--cyan); background: rgba(0, 229, 255, 0.07); border: 1px solid var(--cyan-border); padding: 5px 14px; border-radius: 100px; margin-bottom: 20px; }
.hero-title { font-size: clamp(2.8rem, 6vw, 4.5rem); font-weight: 900; margin-bottom: 5px; line-height: 1.1; letter-spacing: -0.02em; }
.hero-subtitle { font-family: var(--font-sans); font-size: 1.8rem; font-weight: 300; margin-bottom: 20px; }
.glow-cyan { color: var(--cyan); text-shadow: 0 0 40px rgba(0, 229, 255, 0.8), 0 0 20px rgba(0, 229, 255, 0.4); }

/* SPA Layout */
.spa-layout { display: flex; gap: 40px; margin-bottom: 40px; align-items: flex-start; }

/* Sidebar Navigation */
.sidebar { flex: 0 0 22%; max-width: 320px; background: rgba(11,12,19,.4); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; position: sticky; top: 80px; }
.nav-group { margin-bottom: 24px; }
.nav-header { font-family: var(--font-mono); font-size: .65rem; letter-spacing: .2em; color: var(--muted-bright); text-transform: uppercase; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.nav-btn { display: flex; align-items: center; gap: 10px; width: 100%; background: transparent; border: 1px solid transparent; color: var(--white-soft); padding: 10px 14px; border-radius: var(--radius-sm); font-family: var(--font-sans); font-size: .85rem; font-weight: 500; cursor: pointer; transition: all var(--t); text-align: left; margin-bottom: 6px; }
.nav-btn:hover { background: rgba(255,255,255,.03); color: var(--white); }
.nav-btn.active { background: rgba(0, 229, 255, 0.1); border-color: var(--cyan-border); color: var(--cyan); text-shadow: 0 0 10px var(--cyan-glow); }
.nav-btn.active-sing { background: rgba(105, 255, 71, 0.1); border-color: rgba(105, 255, 71, 0.2); color: var(--green); text-shadow: 0 0 10px rgba(105, 255, 71, 0.3); }

/* Terminal Shell */
.lab-terminal { flex-grow: 1; width: 100%; background: rgba(11,12,19,.5); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border: 1px solid var(--cyan-border); border-radius: 18px; overflow: hidden; box-shadow: 0 40px 100px rgba(0,0,0,.8), 0 0 60px rgba(0,229,255,.08); position: relative; min-height: 500px; display: flex; flex-direction: column; }
.lab-chrome { display: flex; align-items: center; justify-content: space-between; padding: 13px 20px; background: rgba(5,6,10,.9); border-bottom: 1px solid var(--border); }
.traffic-lights { display: flex; gap: 7px; }
.tl { width: 12px; height: 12px; border-radius: 50%; }
.tl-r { background: #ff5f57; } .tl-y { background: #febc2e; } .tl-g { background: #28c840; }
.chrome-title { font-family: var(--font-mono); font-size: .72rem; color: var(--muted); }

/* Chalkboard Math Full-Screen Flow */
.chalkboard-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; overflow-y: auto; -webkit-overflow-scrolling: touch; overscroll-behavior: contain; background: radial-gradient(circle at 50% 10%, rgba(13, 15, 24, 0.95), rgba(0, 0, 0, 0.98) 80%); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); z-index: 9999; display: none; flex-direction: column; align-items: center; justify-content: flex-start; padding: 80px 20px 100px 20px; text-align: left; }

/* Chalk Controls — Skip / Quit (FASE 3: liberdade ao usuário) */
.chalk-controls { position: fixed; top: 20px; right: 24px; display: flex; gap: 10px; z-index: 10001; }
.chalk-ctrl-btn { background: rgba(11,12,19,.85); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--cyan-border); color: var(--white-soft); padding: 8px 14px; border-radius: 8px; font-family: var(--font-mono); font-size: 0.68rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; cursor: pointer; display: inline-flex; align-items: center; gap: 7px; transition: all var(--t); }
.chalk-ctrl-btn:hover { background: rgba(0,229,255,.1); color: var(--cyan); border-color: var(--cyan); box-shadow: 0 0 14px var(--cyan-glow); }
.chalk-ctrl-btn--quit { border-color: rgba(255,82,82,.25); }
.chalk-ctrl-btn--quit:hover { background: rgba(255,82,82,.1); color: var(--red); border-color: var(--red); box-shadow: 0 0 14px var(--red-glow); }

.chalk-lore-top { max-width: 1100px; width: 100%; text-align: left; margin: 0 auto 30px auto; opacity: 0; transform: translateY(20px); transition: all 0.8s ease; }
.chalk-lore-top.visible { opacity: 1; transform: translateY(0); }
.chalk-lore-top strong { color: var(--cyan); font-weight: 700; }

/* Camada Zero — Síntese para o Público (não-jargão, antes do protocolo técnico) */
.chalk-public-banner { background: linear-gradient(135deg, rgba(0,229,255,0.07) 0%, rgba(255,202,40,0.04) 100%); border: 1px solid rgba(0,229,255,0.25); border-radius: 14px; padding: 22px 26px; display: flex; gap: 18px; align-items: flex-start; box-shadow: 0 0 40px rgba(0,229,255,0.08); }
.chalk-public-icon { flex-shrink: 0; width: 46px; height: 46px; border-radius: 50%; background: rgba(0,229,255,0.12); border: 1px solid var(--cyan-border); display: flex; align-items: center; justify-content: center; color: var(--cyan); box-shadow: 0 0 16px rgba(0,229,255,0.2); }
.chalk-public-content { flex: 1; }
.chalk-public-tag { font-size: 0.7rem; font-family: var(--font-mono); letter-spacing: 0.18em; color: var(--cyan); text-transform: uppercase; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.chalk-public-headline { font-family: var(--font-sans); font-size: 1.2rem; font-weight: 700; color: var(--white); margin-bottom: 8px; line-height: 1.35; }
.chalk-public-summary { font-family: var(--font-sans); font-size: 1rem; color: var(--white-soft); line-height: 1.75; }
.chalk-public-summary strong { color: var(--white); }
.chalk-public-summary em { color: var(--amber); font-style: normal; font-weight: 500; }

.chalkboard-container { display: flex; flex-direction: column; width: 100%; max-width: 1100px; gap: 18px; align-items: stretch; flex-shrink: 0; }
.chalk-math-side, .chalk-final-side { display: flex; flex-direction: column; gap: 18px; width: 100%; }

.katex { color: inherit; text-shadow: inherit; }

.chalk-line {
    font-size: 1.5rem; color: var(--cyan); line-height: 1.8; margin-bottom: 10px;
    text-shadow: 0 0 15px var(--cyan-glow);
}
.chalk-subtext {
    font-family: var(--font-sans); font-size: 0.95rem; color: var(--muted-bright);
    margin-top: -15px; margin-bottom: 15px; font-style: italic; font-weight: 300; display: flex; align-items: center;
}
.chalk-final-box {
    border: 1px solid var(--cyan); background: rgba(0, 229, 255, 0.05); padding: 50px 30px; border-radius: 16px; text-align: center; box-shadow: 0 0 60px rgba(0, 229, 255, 0.15), inset 0 0 30px rgba(0,229,255,0.05); width: 100%; opacity: 0; transform: scale(0.95); transition: all 0.6s cubic-bezier(0.2, 0, 0.2, 1); display: flex; flex-direction: column; gap: 20px;
}
.chalk-final-box.visible { opacity: 1; transform: scale(1); }
.chalk-final-line {
    font-size: 2.6rem; color: var(--cyan); text-shadow: 0 0 30px rgba(0,229,255,0.8); font-weight: bold;
}

/* Insights do Kernel (Exegese Matemática) */
.chalk-insight-box {
    grid-column: 1 / -1; margin-top: 10px; padding: 40px; border-left: 3px solid var(--amber);
    background: linear-gradient(90deg, rgba(255,202,40,0.05) 0%, transparent 100%);
    display: flex; flex-direction: column; gap: 20px; opacity: 0; transform: translateY(20px); transition: all 0.8s ease;
}
.chalk-insight-box.visible { opacity: 1; transform: translateY(0); }
.chalk-insight-title { font-family: var(--font-mono); font-size: 0.8rem; color: var(--amber); text-transform: uppercase; letter-spacing: 0.15em; display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.chalk-insight-p { font-size: 0.95rem; color: var(--white-soft); line-height: 1.8; }
.chalk-insight-p strong { color: var(--white); font-weight: 700; border-bottom: 1px dotted var(--amber); padding-bottom: 2px; }
.insight-typing { clip-path: inset(0 100% 0 0); animation: typing 2s cubic-bezier(0.2, 0.0, 0.2, 1) forwards; }
.insight-done { clip-path: none; }

@keyframes typing { from { clip-path: inset(0 100% 0 0); } to { clip-path: inset(0 0 0 0); } }
.typing-active { animation: typing 1.2s cubic-bezier(0.2, 0.0, 0.2, 1) forwards; }
.typing-done { clip-path: none; }

/* ================================================================
   Estrutura de 10 Seções (VENIA_CALCULATION_PROTOCOL)
================================================================ */
.chalk-section { opacity: 0; transform: translateY(16px); transition: all 0.5s cubic-bezier(0.2,0,0.2,1); padding: 22px 26px; border-radius: 12px; background: rgba(11,12,19,.45); border: 1px solid var(--border); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.chalk-section.visible { opacity: 1; transform: translateY(0); }
.chalk-section-header { display: flex; align-items: center; gap: 14px; padding-bottom: 12px; margin-bottom: 16px; border-bottom: 1px solid var(--cyan-border); font-family: var(--font-mono); font-size: 0.78rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--cyan); }
.chalk-section-num { display: inline-flex; align-items: center; justify-content: center; min-width: 30px; height: 30px; padding: 0 6px; border-radius: 50%; background: rgba(0,229,255,0.08); border: 1px solid var(--cyan-border); font-size: 0.85rem; color: var(--cyan); font-weight: 800; box-shadow: 0 0 12px rgba(0,229,255,0.18); }
.chalk-section-title { flex: 1; }
.chalk-section-body { display: flex; flex-direction: column; gap: 10px; }

.chalk-id-card { display: grid; grid-template-columns: max-content 1fr; gap: 10px 18px; align-items: baseline; font-family: var(--font-sans); font-size: 0.95rem; line-height: 1.55; }
.chalk-id-label { font-family: var(--font-mono); font-size: 0.7rem; color: var(--muted-bright); text-transform: uppercase; letter-spacing: 0.12em; }
.chalk-id-value { color: var(--white); font-weight: 500; }

.chalk-text-block { font-family: var(--font-sans); font-size: 0.95rem; color: var(--white-soft); line-height: 1.8; }
.chalk-text-block strong { color: var(--white); border-bottom: 1px dotted var(--cyan-border); padding-bottom: 1px; }
.chalk-text-block .katex { color: var(--cyan); }

.chalk-validation-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.chalk-val-card { background: rgba(5,6,10,.55); border: 1px solid var(--border); border-radius: 10px; padding: 14px 16px; }
.chalk-val-card.kernel { border-color: rgba(0,229,255,0.25); }
.chalk-val-card.observed { border-color: rgba(105,255,71,0.25); }
.chalk-val-card.delta { border-color: rgba(255,202,40,0.25); }
.chalk-val-label { font-family: var(--font-mono); font-size: 0.65rem; color: var(--muted-bright); text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 8px; }
.chalk-val-value { font-family: var(--font-mono); font-size: 1rem; font-weight: 700; }
.chalk-val-card.kernel .chalk-val-value { color: var(--cyan); text-shadow: 0 0 10px var(--cyan-glow); }
.chalk-val-card.observed .chalk-val-value { color: var(--green); }
.chalk-val-card.delta .chalk-val-value { color: var(--amber); }

/* Variantes por seção */
.chalk-section-id { border-color: rgba(255,255,255,0.1); background: rgba(11,12,19,.65); }
.chalk-section-id .chalk-section-header { color: var(--white); border-color: rgba(255,255,255,0.1); }
.chalk-section-id .chalk-section-num { color: var(--white); border-color: rgba(255,255,255,0.18); background: rgba(255,255,255,0.06); }

.chalk-section-result { border-color: rgba(255,202,40,0.3); box-shadow: 0 0 30px rgba(255,202,40,0.08); }
.chalk-section-result .chalk-section-header { color: var(--amber); border-color: rgba(255,202,40,0.3); }
.chalk-section-result .chalk-section-num { color: var(--amber); border-color: rgba(255,202,40,0.3); background: rgba(255,202,40,0.08); box-shadow: 0 0 12px rgba(255,202,40,0.25); }
.chalk-section-result .chalk-final-line { color: var(--amber); text-shadow: 0 0 24px rgba(255,202,40,0.6); }

.chalk-section-validation .chalk-section-header { color: var(--green); border-color: rgba(105,255,71,0.3); }
.chalk-section-validation .chalk-section-num { color: var(--green); border-color: rgba(105,255,71,0.3); background: rgba(105,255,71,0.08); }

.chalk-section-physical .chalk-section-header,
.chalk-section-venia .chalk-section-header,
.chalk-section-falsifiability .chalk-section-header { color: var(--white-soft); border-color: var(--border); }
.chalk-section-physical .chalk-section-num,
.chalk-section-venia .chalk-section-num,
.chalk-section-falsifiability .chalk-section-num { color: var(--white-soft); border-color: var(--border); background: rgba(255,255,255,0.04); box-shadow: none; }

.chalk-section-falsifiability { border-left: 3px solid var(--red); }
.chalk-section-falsifiability .chalk-section-header { color: var(--red); }
.chalk-section-falsifiability .chalk-section-num { color: var(--red); border-color: rgba(255,82,82,0.3); background: rgba(255,82,82,0.06); }

/* FASE 4: Progressive Disclosure — acordeões para Exegese (sec 8/9/10) */
.chalk-section.collapsible .chalk-section-header { cursor: pointer; user-select: none; transition: background var(--t); border-radius: 6px; padding-left: 4px; padding-right: 4px; margin-left: -4px; margin-right: -4px; }
.chalk-section.collapsible .chalk-section-header:hover { background: rgba(255,255,255,0.04); }
.chalk-section-toggle { margin-left: auto; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.1em; padding: 3px 8px; border-radius: 4px; background: rgba(0,229,255,0.08); border: 1px solid var(--cyan-border); color: var(--cyan); transition: all var(--t); white-space: nowrap; }
.chalk-section.collapsible.collapsed .chalk-section-toggle::before { content: '▸ Expandir'; }
.chalk-section.collapsible:not(.collapsed) .chalk-section-toggle::before { content: '▾ Recolher'; }
.chalk-section.collapsible .chalk-section-body { overflow: hidden; transition: max-height 0.4s ease, opacity 0.3s ease; max-height: 4000px; }
.chalk-section.collapsible.collapsed .chalk-section-body { max-height: 0; opacity: 0; margin: 0; padding: 0; }

/* Views */
.env-view { display: none; flex-direction: column; flex-grow: 1; }
.env-view.active { display: flex; }
.module-view { display: none; animation: fadeIn 0.4s ease forwards; }
.module-view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.lab-section { padding: 20px 24px; border-bottom: 1px solid var(--border); }

/* Grid & Forms */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.lab-panel-title { display: flex; align-items: center; gap: 8px; font-family: var(--font-mono); font-size: .68rem; letter-spacing: .15em; text-transform: uppercase; color: var(--white-soft); margin-bottom: 14px; }
.lab-panel-title .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.form-group { margin-bottom: 12px; }
.form-label { font-family: var(--font-mono); font-size: .66rem; color: var(--cyan); text-transform: uppercase; margin-bottom: 6px; display: block; }
.form-input { width: 100%; background: rgba(5,6,10,.75); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 13px; color: var(--white); font-family: var(--font-mono); font-size: .83rem; outline: none; transition: all var(--t); }
.form-input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0,229,255,.1); }

/* Range sliders (FASE 3 — inputs dinâmicos) */
.val-container { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; gap: 10px; }
.range-value { font-family: var(--font-mono); font-size: 0.82rem; font-weight: 700; padding: 4px 12px; border-radius: 6px; min-width: 110px; text-align: center; }
.range-slider { width: 100%; -webkit-appearance: none; appearance: none; height: 6px; background: rgba(255,255,255,0.08); border-radius: 6px; outline: none; cursor: pointer; transition: background var(--t); }
.range-slider:hover { background: rgba(255,255,255,0.12); }
.range-slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 20px; height: 20px; border-radius: 50%; cursor: pointer; transition: transform var(--t); }
.range-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.range-slider::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; border: none; cursor: pointer; transition: transform var(--t); }
.slider-cyan::-webkit-slider-thumb { background: var(--cyan); box-shadow: 0 0 12px var(--cyan-glow); }
.slider-cyan::-moz-range-thumb { background: var(--cyan); box-shadow: 0 0 12px var(--cyan-glow); }
.slider-cyan + .val-container .range-value, .form-group:has(.slider-cyan) .range-value { color: var(--cyan); border: 1px solid var(--cyan-border); background: rgba(0,229,255,0.08); }
.slider-red::-webkit-slider-thumb { background: var(--red); box-shadow: 0 0 12px var(--red-glow); }
.slider-red::-moz-range-thumb { background: var(--red); box-shadow: 0 0 12px var(--red-glow); }
.form-group:has(.slider-red) .range-value { color: var(--red); border: 1px solid rgba(255,82,82,0.3); background: rgba(255,82,82,0.08); }
.slider-amber::-webkit-slider-thumb { background: var(--amber); box-shadow: 0 0 12px var(--amber-glow); }
.slider-amber::-moz-range-thumb { background: var(--amber); box-shadow: 0 0 12px var(--amber-glow); }
.form-group:has(.slider-amber) .range-value { color: var(--amber); border: 1px solid rgba(255,202,40,0.3); background: rgba(255,202,40,0.08); }
.live-data { border-color: var(--green) !important; background: rgba(105,255,71,0.08) !important; color: var(--green) !important; box-shadow: inset 0 0 10px rgba(105,255,71,0.1); }

/* Buttons */
.btn { padding: 11px 22px; border-radius: var(--radius-sm); font-family: var(--font-sans); font-size: .9rem; font-weight: 600; cursor: pointer; border: none; transition: all var(--t); width: 100%; display: flex; align-items: center; justify-content: center; gap: 8px; }
.btn-primary { background: var(--cyan); color: var(--bg-void); box-shadow: 0 0 20px var(--cyan-glow); }
.btn-primary:hover { background: #33eaff; transform: translateY(-2px); }
.btn-amber { background: transparent; color: var(--amber); border: 1px solid rgba(255,202,40,.28); }
.btn-amber:hover { background: rgba(255,202,40,.1); border-color: var(--amber); box-shadow: 0 0 18px var(--amber-glow); }
.btn-red { background: transparent; color: var(--red); border: 1px solid var(--red-border); }
.btn-red:hover { background: rgba(255,82,82,.1); border-color: var(--red); box-shadow: 0 0 18px var(--red-glow); }

/* Terminal Log */
.terminal-log { background: rgba(0,0,0,.5); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border: 1px solid rgba(0,229,255,.08); border-radius: 8px; padding: 18px 20px; font-family: var(--font-mono); font-size: .75rem; color: var(--white-soft); line-height: 1.8; min-height: 200px; max-height: 350px; overflow-y: auto; }
.t-cyan { color: var(--cyan); } .t-amber { color: var(--amber); } .t-red { color: var(--red); } .t-green { color: var(--green); } .t-muted { color: var(--muted); }
.terminal-cursor { display: inline-block; width: 7px; height: 13px; background: var(--cyan); box-shadow: 0 0 8px var(--cyan-glow); animation: blink 1s step-end infinite; vertical-align: text-bottom; }
@keyframes blink { 50% { opacity: 0; } }

/* Epiphany & Verdict UI */
.enigma-lore { background: rgba(0, 229, 255, 0.03); border-left: 3px solid var(--cyan); padding: 18px; margin-bottom: 24px; border-radius: 0 8px 8px 0; font-size: 0.88rem; color: var(--white-soft); line-height: 1.6; }
.enigma-lore strong { color: var(--white); font-family: var(--font-mono); letter-spacing: 0.05em; font-size: 0.8rem; text-transform: uppercase; }
.verdict-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 24px; display: none; }
.v-card { background: rgba(5,6,10,.5); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--border); border-radius: 10px; padding: 18px; position: relative; overflow: hidden; }
.v-card.classic { border-color: rgba(255,82,82,.3); }
.v-card.venia { border-color: rgba(0,229,255,.3); }
.v-card.observed { border-color: rgba(105,255,71,.3); }
.v-title { font-family: var(--font-mono); font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 12px; display: flex; align-items: center; gap: 6px; }
.v-value { font-size: 1.3rem; font-weight: 800; font-family: var(--font-mono); margin-bottom: 8px; letter-spacing: -0.02em; }
.v-desc { font-size: 0.78rem; color: var(--muted-bright); line-height: 1.5; }
.v-accuracy { grid-column: span 3; background: rgba(0,229,255,.05); border: 1px solid var(--cyan-border); text-align: center; padding: 12px; border-radius: 8px; font-family: var(--font-mono); font-weight: 700; color: var(--cyan); font-size: 0.9rem; letter-spacing: 0.05em; text-transform: uppercase; }

/* Previsões UI */
.prev-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 10px; }
.prev-card { background: rgba(11,12,19,.4); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--border); border-radius: 12px; padding: 24px; transition: all var(--t); display: flex; flex-direction: column; }
.prev-card:hover { background: rgba(11,12,19,.9); border-color: var(--cyan-border); box-shadow: 0 10px 30px rgba(0,229,255,.05); }

/* Botão de Impacto Deep Tech (Aplicação Prática) */
.btn-insight {
    display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.03); color: var(--cyan);
    border: 1px solid var(--border); border-radius: 6px; padding: 6px 12px; font-family: var(--font-mono); font-size: 0.7rem;
    text-transform: uppercase; letter-spacing: 0.1em; font-weight: 600; cursor: pointer; transition: all var(--t); margin-bottom: 15px; width: fit-content;
}
.btn-insight:hover {
    background: rgba(0,229,255,0.1); border-color: var(--cyan-border); box-shadow: 0 0 10px rgba(0,229,255,0.1); color: var(--white);
}

/* Filtros Estilo HUD Militar (Segmented Controls) */
.filter-bar-wrapper { display: flex; flex-wrap: wrap; gap: 15px; align-items: center; justify-content: space-between; margin-bottom: 25px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.kernel-tabs { display: flex; gap: 4px; background: rgba(5,6,10,0.6); padding: 4px; border-radius: 8px; border: 1px solid var(--border); width: fit-content; overflow-x: auto; }
.kernel-tab { display: flex; align-items: center; gap: 8px; background: transparent; color: var(--muted-bright); border: none; padding: 8px 16px; font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; font-weight: 600; cursor: pointer; border-radius: 6px; transition: all var(--t); white-space: nowrap; }
.kernel-tab:hover { color: var(--white); background: rgba(255,255,255,0.03); }
.kernel-tab.active { background: rgba(0,229,255,0.1); color: var(--cyan); box-shadow: inset 0 0 10px rgba(0,229,255,0.05); }
.kernel-tab-count { background: rgba(255,255,255,0.1); padding: 2px 6px; border-radius: 100px; font-size: 0.65rem; color: inherit; }
.kernel-tab.active .kernel-tab-count { background: var(--cyan); color: var(--bg-void); }

/* Índice de Confiabilidade (IC) - TRL Científico */
.confidence-badge { font-family: var(--font-mono); font-size: 0.65rem; font-weight: 800; padding: 4px 8px; border-radius: 4px; letter-spacing: 0.1em; cursor: help; text-transform: uppercase; white-space: nowrap; }
.ic-5 { background: rgba(105,255,71,0.1); color: var(--green); border: 1px solid rgba(105,255,71,0.3); }
.ic-4 { background: rgba(0,229,255,0.1); color: var(--cyan); border: 1px solid rgba(0,229,255,0.3); }
.ic-3 { background: rgba(255,202,40,0.1); color: var(--amber); border: 1px solid rgba(255,202,40,0.3); }
.ic-2 { background: rgba(255,140,0,0.1); color: #ff9800; border: 1px solid rgba(255,140,0,0.3); }
.ic-1 { background: rgba(255,82,82,0.1); color: var(--red); border: 1px solid rgba(255,82,82,0.3); }

/* Botões de Ícones 3D Animados (Substituindo Imagens Físicas) */
.prev-icon-btn { width: 100%; height: 160px; background: rgba(0, 229, 255, 0.02); border: 1px solid var(--cyan-border); border-radius: 8px; margin-bottom: 18px; display: flex; flex-direction: column; align-items: center; justify-content: center; cursor: pointer; position: relative; overflow: hidden; transition: all 0.5s cubic-bezier(0.2, 0, 0.2, 1); outline: none; gap: 14px; }
.prev-icon-btn:hover { background: rgba(0, 229, 255, 0.06); border-color: var(--cyan); box-shadow: 0 0 30px rgba(0,229,255,0.15), inset 0 0 20px rgba(0,229,255,0.05); transform: translateY(-3px); }
.prev-icon-btn .neon-icon { width: 46px; height: 46px; color: var(--cyan); filter: drop-shadow(0 0 12px rgba(0,229,255,0.5)); transition: all 0.5s ease; z-index: 2; }
.prev-icon-btn:hover .neon-icon { transform: scale(1.15); filter: drop-shadow(0 0 20px rgba(0,229,255,0.8)); }
.prev-icon-btn .btn-label { font-family: var(--font-mono); font-size: 0.65rem; color: var(--cyan); text-transform: uppercase; letter-spacing: 0.15em; font-weight: 700; z-index: 2; opacity: 0.6; transition: opacity 0.3s ease; text-align: center; padding: 0 10px; }
.prev-icon-btn:hover .btn-label { opacity: 1; text-shadow: 0 0 8px var(--cyan-glow); }

/* Anéis Holográficos de Rotação */
.icon-ring-1, .icon-ring-2 { position: absolute; border-radius: 50%; border: 1px dashed var(--cyan-border); top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 1; pointer-events: none; }
.icon-ring-1 { width: 110px; height: 110px; animation: spin-slow 12s linear infinite; }
.icon-ring-2 { width: 140px; height: 140px; border-style: dotted; opacity: 0.4; animation: spin-slow-reverse 18s linear infinite; }
.prev-icon-btn:hover .icon-ring-1 { border-color: rgba(0, 229, 255, 0.4); animation-duration: 4s; }
.prev-icon-btn:hover .icon-ring-2 { border-color: rgba(0, 229, 255, 0.2); animation-duration: 6s; }
@keyframes spin-slow { 100% { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes spin-slow-reverse { 100% { transform: translate(-50%, -50%) rotate(-360deg); } }

.status-badge { display: inline-flex; padding: 4px 10px; border-radius: 100px; font-family: var(--font-mono); font-size: 0.65rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; margin-top: 15px; }
.status-pend { background: rgba(255,202,40,.1); color: var(--amber); border: 1px solid rgba(255,202,40,.3); }
.status-conf { background: rgba(105,255,71,.1); color: var(--green); border: 1px solid rgba(105,255,71,.3); }
.cat-chip { display: inline-flex; align-items: center; justify-content: center; padding: 4px 10px; border-radius: 100px; font-family: var(--font-mono); font-size: 0.55rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; border: 1px solid; width: fit-content; }
.cat-chip.cat-a { background: rgba(105,255,71,.12); color: var(--green); border-color: rgba(105,255,71,.35); }
.cat-chip.cat-b { background: rgba(255,202,40,.12); color: var(--amber); border-color: rgba(255,202,40,.35); }
.cat-chip.cat-c { background: rgba(0,229,255,.12); color: var(--cyan); border-color: rgba(0,229,255,.35); }
.cat-chip.cat-limit { background: rgba(200,208,224,.12); color: var(--muted-bright); border-color: rgba(200,208,224,.35); }
.prev-result { margin-top: 20px; padding-top: 15px; border-top: 1px dashed var(--border); display: none; animation: fadeIn var(--t) ease forwards; }
.prev-result h4 { font-family: var(--font-mono); font-size: 0.75rem; color: var(--cyan); text-transform: uppercase; margin-bottom: 8px; }
.prev-result p { font-size: 0.8rem; color: var(--white-soft); line-height: 1.5; margin-bottom: 10px; }

/* Singularidade Deep Tech UI */
.sing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 10px; }
.sing-card { background: rgba(5,6,10,0.5); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; display: flex; flex-direction: column; transition: all var(--t); }
.sing-card:hover { border-color: var(--cyan-border); box-shadow: 0 10px 40px rgba(0,229,255,.05); }
.sing-card-header { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; background: rgba(0,0,0,0.4); }
.sing-card-header h3 { font-family: var(--font-sans); font-size: 1rem; color: var(--white); display: flex; align-items: center; gap: 10px; }
.badge { font-family: var(--font-mono); font-size: 0.6rem; padding: 4px 8px; border-radius: 4px; background: rgba(105,255,71,0.1); color: var(--green); border: 1px solid rgba(105,255,71,0.2); font-weight: 700; letter-spacing: 0.05em; }
.sing-blueprint { height: 180px; background: #030406; position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; border-bottom: 1px solid var(--border); }
.sing-card-body { padding: 20px; flex-grow: 1; display: flex; flex-direction: column; justify-content: space-between; gap: 20px; }
.sing-stats { display: flex; gap: 15px; font-family: var(--font-mono); font-size: 0.8rem; }
.sing-stats div { background: rgba(0,229,255,0.03); padding: 12px; border-radius: 6px; border: 1px solid var(--cyan-border); flex: 1; text-align: center; }
.sing-stats span { display: block; color: var(--muted-bright); font-size: 0.65rem; margin-bottom: 4px; text-transform: uppercase; }
.sing-stats strong { color: var(--cyan); font-size: 1.15rem; text-shadow: 0 0 10px var(--cyan-glow); }

/* FASE 7: Backtester Time Machine */
.backtester-panel { background: rgba(5,6,10,0.4); border: 1px solid rgba(255,255,255,0.05); border-radius: 12px; padding: 20px; position: relative; }
.backtest-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin: 15px 0; padding: 15px 0; border-top: 1px dashed var(--border); border-bottom: 1px dashed var(--border); }
.bt-col { display: flex; flex-direction: column; align-items: center; text-align: center; }
.bt-label { font-family: var(--font-mono); font-size: 0.6rem; color: var(--muted-bright); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 6px; }
.bt-val { font-family: var(--font-mono); font-size: 1.3rem; font-weight: 700; letter-spacing: -0.02em; }
.bt-accuracy { text-align: center; font-family: var(--font-mono); font-size: 0.8rem; font-weight: 800; letter-spacing: 0.15em; color: var(--green); text-shadow: 0 0 10px rgba(105,255,71,0.4); }

/* ================================================================
   FASE 6: UX Documental (SSOT Fundamentos)
================================================================ */
.doc-article { max-width: 960px; margin: 0 auto; width: 100%; font-size: 0.95rem; padding-bottom: 60px; animation: fadeIn var(--t) ease forwards; }
.doc-h1 { font-family: var(--font-mono); font-size: 1.8rem; color: var(--white); margin-bottom: 10px; letter-spacing: -0.02em; }
.doc-h2 { font-family: var(--font-mono); font-size: 1.1rem; color: var(--cyan); margin-bottom: 20px; padding-bottom: 8px; border-bottom: 1px solid var(--border); margin-top: 40px; display: flex; align-items: center; gap: 10px; }
.doc-h3 { font-family: var(--font-sans); font-size: 1.05rem; color: var(--white); margin-top: 25px; margin-bottom: 10px; font-weight: 600; }
.doc-p { color: var(--white-soft); line-height: 1.8; margin-bottom: 16px; }
.doc-math-box { background: rgba(0,229,255,0.02); border-left: 2px solid var(--cyan); padding: 20px 24px; margin: 24px 0; border-radius: 0 8px 8px 0; box-shadow: inset 0 0 20px rgba(0,229,255,0.02); }
.doc-math-box.amber { background: rgba(255,202,40,0.02); border-color: var(--amber); box-shadow: inset 0 0 20px rgba(255,202,40,0.02); }
.doc-math-box.green { background: rgba(105,255,71,0.02); border-color: var(--green); box-shadow: inset 0 0 20px rgba(105,255,71,0.02); }
.doc-math-title { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 12px; display: block; opacity: 0.8; }
.doc-math-box.amber .doc-math-title { color: var(--amber); }
.doc-math-box.cyan .doc-math-title { color: var(--cyan); }
.doc-math-box.green .doc-math-title { color: var(--green); }

/* ================================================================
   FASE 5: Lead-Gen Modal — "Acesso Restrito" militarizado
================================================================ */
.lead-modal { position: fixed; inset: 0; z-index: 10010; display: flex; align-items: center; justify-content: center; padding: 20px; animation: fadeIn 0.25s ease; }
.lead-modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.85); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); cursor: pointer; }
.lead-modal-card { position: relative; background: rgba(11,12,19,.95); border: 1px solid var(--cyan-border); border-radius: 16px; padding: 36px 36px 28px; max-width: 560px; width: 100%; box-shadow: 0 0 80px var(--cyan-glow), inset 0 0 0 1px rgba(0,229,255,0.04); animation: leadModalRise 0.35s cubic-bezier(0.2, 0, 0.2, 1); max-height: 92vh; overflow-y: auto; }
@keyframes leadModalRise { from { opacity: 0; transform: translateY(20px) scale(0.97); } to { opacity: 1; transform: translateY(0) scale(1); } }
.lead-modal-close { position: absolute; top: 10px; right: 10px; background: transparent; border: none; color: var(--muted-bright); font-size: 1.7rem; cursor: pointer; display: flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; border-radius: 8px; transition: all var(--t); }
.lead-modal-close:hover { color: var(--red); background: rgba(255,82,82,0.08); }
.lead-modal-tag { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.18em; color: var(--red); padding: 5px 12px; border: 1px solid rgba(255,82,82,0.35); border-radius: 4px; display: inline-flex; align-items: center; gap: 6px; margin-bottom: 18px; text-transform: uppercase; background: rgba(255,82,82,0.04); font-weight: 700; }
.lead-modal-title { font-family: var(--font-sans); font-size: 1.4rem; font-weight: 700; color: var(--white); margin-bottom: 14px; line-height: 1.3; }
.lead-modal-body { font-size: 0.92rem; color: var(--white-soft); line-height: 1.65; margin-bottom: 18px; }
.lead-modal-meta { font-family: var(--font-mono); font-size: 0.74rem; color: var(--cyan); padding: 12px 14px; background: rgba(0,229,255,0.05); border-left: 2px solid var(--cyan); border-radius: 0 6px 6px 0; margin-bottom: 24px; line-height: 1.65; }
.lead-modal-form { display: flex; flex-direction: column; gap: 10px; }
.lead-modal-form input, .lead-modal-form textarea { background: rgba(5,6,10,0.7); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; color: var(--white); font-family: var(--font-mono); font-size: 0.85rem; outline: none; transition: all var(--t); resize: vertical; font-family: var(--font-sans); }
.lead-modal-form input:focus, .lead-modal-form textarea:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0,229,255,0.1); }
.lead-modal-form textarea { font-family: var(--font-sans); min-height: 80px; }
.lead-modal-form button[type="submit"] { margin-top: 8px; }
.lead-modal-footnote { font-size: 0.7rem; color: var(--muted); text-align: center; margin-top: 16px; line-height: 1.55; padding-top: 14px; border-top: 1px solid var(--border); }

/* ================================================================
   RESPONSIVE — Mobile first additive rules (max-width only, never
   overrides desktop). Tiers: 1024, 900, 768, 600, 480, 360.
================================================================ */

/* Fluid hero subtitle (replaces the fixed 1.8rem above) */
.hero-subtitle { font-size: clamp(1.05rem, 3.8vw, 1.8rem); }

/* Tap-target hygiene — interactive elements should be >= 44px tall on touch */
.nav-btn, .kernel-tab, .prev-icon-btn, .btn-insight, .chalk-ctrl-btn,
.btn, .prev-card .btn, .lead-modal-close, .form-input,
.kernel-tabs { min-height: 36px; }
@media (hover: none) and (pointer: coarse) {
    .nav-btn, .kernel-tab, .btn, .btn-insight, .chalk-ctrl-btn { min-height: 44px; }
    .lead-modal-close { min-width: 44px; min-height: 44px; }
}

/* Long math / mono blocks must scroll horizontally inside their container
   instead of pushing the page wider than the viewport.
   NÃO incluir .chalkboard-container aqui: overflow-x:auto força overflow-y:auto
   no mesmo elemento, e o flexbox do overlay o encolhe para uma caixinha
   rolante de ~260px. O scroll vertical é exclusivo de .chalkboard-overlay. */
.chalk-section-body,
.chalk-text-block,
.chalk-final-box,
.doc-math-box { max-width: 100%; overflow-x: auto; }
.terminal-log { overflow-x: auto; }
.katex-display { overflow-x: auto; overflow-y: hidden; max-width: 100%; }

/* Filter bar can scroll its inner tabs horizontally without breaking layout */
.kernel-tabs { -webkit-overflow-scrolling: touch; }

/* ---------------- 1024px: small laptop / large tablet ---------------- */
@media (max-width: 1024px) {
    .container { width: 94vw; }
    .verdict-grid { grid-template-columns: repeat(2, 1fr); }
    .chalk-validation-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ---------------- 900px: sidebar collapses ---------------- */
@media (max-width: 900px) {
    .spa-layout { flex-direction: column; gap: 24px; }
    .sidebar { width: 100%; max-width: 100%; flex: 0 0 auto; position: relative; top: 0; }
    .nav-btn { padding: 12px 14px; font-size: 0.9rem; }
}

/* ---------------- 768px: tablet portrait ---------------- */
@media (max-width: 768px) {
    .container { padding: 0 16px; }
    #hero { padding: 50px 0 30px; }
    .prev-grid, .sing-grid { grid-template-columns: 1fr; gap: 18px; }
    .grid-2 { grid-template-columns: 1fr; gap: 14px; }
    .backtest-grid { gap: 10px; }
    .chalk-id-card { grid-template-columns: 1fr; gap: 4px 0; }
    .chalk-id-label { margin-top: 8px; }
    .chalk-validation-grid { grid-template-columns: 1fr; }
    .verdict-grid { grid-template-columns: 1fr; }
    .v-accuracy { grid-column: 1 / -1; }
    .lead-modal-card { padding: 28px 22px 22px; }
    .lead-modal-title { font-size: 1.2rem; }
    .chalkboard-overlay { padding: 64px 16px 80px; }
    .chalk-controls { top: 12px; right: 12px; gap: 6px; }
    .lab-section { padding: 18px 18px; }
    .filter-bar-wrapper { gap: 10px; }
    .doc-article { padding-bottom: 40px; }
    /* Tables: allow horizontal scroll inside their wrapper */
    .doc-article table { display: block; overflow-x: auto; white-space: nowrap; }
}

/* ---------------- 600px: large phone ---------------- */
@media (max-width: 600px) {
    .container { padding: 0 14px; }
    .logo-text { font-size: 1rem; }
    /* Hide secondary nav indicator on observatorio if present (kernel page) */
    .nav-inner > a[href="/venia/"] { font-size: 0.72rem; }
    /* Reduce monospaced font sizes so long formulas don't blow the line */
    .chalk-line { font-size: 1.05rem; line-height: 1.6; }
    .chalk-final-line { font-size: 1.6rem; }
    .chalk-text-block, .chalk-insight-p { font-size: 0.88rem; line-height: 1.7; }
    .terminal-log { font-size: 0.7rem; padding: 14px 14px; }
    .chalk-section { padding: 18px 18px; }
    .chalk-section-header { font-size: 0.7rem; gap: 10px; padding-bottom: 10px; margin-bottom: 12px; }
    .chalk-section-num { min-width: 26px; height: 26px; font-size: 0.78rem; }
    .chalk-final-box { padding: 32px 18px; }
    .doc-h1 { font-size: 1.4rem; }
    .doc-h2 { font-size: 0.98rem; }
    .doc-h3 { font-size: 0.98rem; }
    .doc-math-box { padding: 16px 16px; }
    .label-tag { font-size: 0.6rem; padding: 4px 10px; }
    .prev-card { padding: 18px; }
    .prev-icon-btn { height: 130px; }
    .sing-card-body { padding: 18px; }
    .sing-blueprint { height: 140px; }
    .sing-stats { flex-direction: column; gap: 8px; }
    .sing-stats div { padding: 10px; }
    .lab-chrome { padding: 10px 12px; }
    .chrome-title { font-size: 0.62rem; }
    .lab-chrome > div:last-child { display: none; } /* "SOLVER CLIENT-SIDE ATIVO" badge */
    /* Mono font on small screens reads better at 0.78rem inside scrolling blocks */
    .terminal-log, .form-input { font-size: 0.78rem; }
    .filter-bar-wrapper { flex-direction: column; align-items: stretch; }
    .kernel-tabs { width: 100%; overflow-x: auto; flex-wrap: nowrap; }
    .v-value { font-size: 1.1rem; }
    .bt-val { font-size: 1.05rem; }
    .doc-article table { font-size: 0.78rem; }
    .doc-article th, .doc-article td { padding: 8px 10px !important; }
    /* Chalkboard control buttons more touch-friendly but compact */
    .chalk-ctrl-btn { padding: 10px 12px; font-size: 0.62rem; letter-spacing: 0.08em; }
}

/* ---------------- 480px: phone ---------------- */
@media (max-width: 480px) {
    .container { padding: 0 12px; width: 96vw; }
    #hero { padding: 32px 0 20px; }
    .nav { padding: 10px 0; }
    .chalk-line { font-size: 0.95rem; }
    .chalk-final-line { font-size: 1.35rem; }
    .chalk-final-box { padding: 24px 14px; }
    .chalk-section { padding: 14px 14px; }
    .chalk-public-banner { padding: 16px 14px; flex-direction: column; gap: 10px; }
    .chalk-insight-box { padding: 22px 18px; }
    .lab-section { padding: 14px 14px; }
    .lab-terminal { border-radius: 12px; }
    .prev-icon-btn { height: 110px; }
    .prev-icon-btn .neon-icon { width: 38px; height: 38px; }
    .icon-ring-1 { width: 88px; height: 88px; }
    .icon-ring-2 { width: 116px; height: 116px; }
    .doc-h1 { font-size: 1.25rem; }
    .lead-modal { padding: 12px; }
    .lead-modal-card { padding: 22px 18px 18px; max-height: 94vh; }
    .lead-modal-title { font-size: 1.05rem; }
    .chrome-title { font-size: 0.58rem; }
    .traffic-lights { gap: 5px; }
    .tl { width: 9px; height: 9px; }
}

/* ---------------- 360px: small phone (iPhone SE 1st gen, Galaxy Fold cover) ---------------- */
@media (max-width: 360px) {
    .container { padding: 0 10px; }
    .logo-text { font-size: 0.92rem; }
    .chalk-line { font-size: 0.88rem; }
    .chalk-final-line { font-size: 1.2rem; }
    .prev-card { padding: 14px; }
    .sing-card-body { padding: 14px; }
}