/* Explain: Styling for reusable UI components like buttons, cards, and forms. */
/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .55rem;
    padding: .7rem 1.35rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: .95rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all .25s ease;
    white-space: nowrap;
    line-height: 1.2;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 10px 24px -12px rgba(15, 118, 110, .8);
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }

.btn-accent {
    background: var(--accent-color);
    color: #3a2500;
}
.btn-accent:hover { background: var(--accent-hover); transform: translateY(-1px); }

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-light);
}
.btn-outline:hover { background: var(--primary-soft); }

.btn-ghost {
    background: transparent;
    color: var(--text-color);
}
.btn-ghost:hover { background: var(--surface-alt); }

.btn-light {
    background: #fff;
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}
.btn-light:hover { transform: translateY(-1px); }

.btn-block { width: 100%; }
.btn-lg { padding: .95rem 1.75rem; font-size: 1.02rem; }
.btn-sm { padding: .5rem 1rem; font-size: .85rem; }

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    height: 4.5rem;
}
.brand { display: flex; align-items: center; gap: .6rem; font-family: var(--font-heading); font-weight: 700; font-size: 1.15rem; }
.brand-mark {
    display: grid; place-items: center;
    width: 2.25rem; height: 2.25rem; border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff; font-size: 1rem;
}
.main-nav { display: none; gap: 1.75rem; font-weight: 500; font-size: .95rem; }
.main-nav a { color: var(--text-muted); transition: color .2s; }
.main-nav a:hover { color: var(--primary-color); }
.header-actions { display: none; align-items: center; gap: .6rem; }
.nav-toggle {
    display: grid; place-items: center;
    width: 2.75rem; height: 2.75rem; border-radius: 12px;
    border: 1px solid var(--border-color); background: #fff; font-size: 1.1rem; cursor: pointer;
}
.mobile-menu { display: none; border-top: 1px solid var(--border-color); background: #fff; padding: 1rem 1.25rem 1.5rem; }
.mobile-menu.open { display: block; }
.mobile-menu nav { display: flex; flex-direction: column; gap: .25rem; }
.mobile-menu nav a { padding: .75rem .5rem; border-radius: 10px; font-weight: 500; }
.mobile-menu nav a:hover { background: var(--surface); }
.mobile-menu .row-wrap { margin-top: 1rem; }

@media (min-width: 1024px) {
    .main-nav { display: flex; }
    .header-actions { display: flex; }
    .nav-toggle { display: none; }
    .mobile-menu { display: none !important; }
}

/* ===== Cards ===== */
.card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: all .3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.card-hover:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary-light); }
.card-icon {
    display: grid; place-items: center;
    width: 3rem; height: 3rem; border-radius: 14px;
    background: var(--primary-soft); color: var(--primary-color);
    font-size: 1.3rem; margin-bottom: 1.15rem;
}
.card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: .5rem; }
.card p { color: var(--text-muted); font-size: .95rem; }

/* ===== Badges / Pills ===== */
.pill {
    display: inline-flex; align-items: center; gap: .4rem;
    padding: .3rem .75rem; border-radius: 999px;
    font-size: .78rem; font-weight: 600;
}
.pill-green { background: var(--success-soft); color: #15803d; }
.pill-amber { background: var(--warning-soft); color: #b45309; }
.pill-red { background: var(--danger-soft); color: #b91c1c; }
.pill-teal { background: var(--primary-soft); color: var(--primary-color); }
.pill-grey { background: var(--surface-alt); color: var(--text-muted); }

/* ===== Forms ===== */
.field { display: flex; flex-direction: column; gap: .45rem; margin-bottom: 1.1rem; }
.field label { font-size: .88rem; font-weight: 600; }
.field-hint { font-size: .8rem; color: var(--text-muted); }
.input, .select, textarea.input {
    width: 100%;
    padding: .75rem .9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: #fff;
    font-family: inherit;
    font-size: .95rem;
    color: var(--text-color);
    transition: border-color .2s, box-shadow .2s;
}
.input:focus, .select:focus, textarea.input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-soft);
}
textarea.input { resize: vertical; min-height: 120px; }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 0 1.25rem; }
@media (min-width: 768px) {
    .form-grid.two { grid-template-columns: 1fr 1fr; }
    .form-grid.three { grid-template-columns: 1fr 1fr 1fr; }
}
.form-span { grid-column: 1 / -1; }

/* ===== Simulator ===== */
.sim-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}
@media (min-width: 900px) {
    .sim-card { grid-template-columns: 1.05fr .95fr; }
}
.sim-form { padding: 2rem; }
.sim-results {
    background: linear-gradient(150deg, var(--secondary-color), var(--primary-color));
    color: #fff;
    padding: 2rem;
}
.sim-results .eyebrow { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.2); }
.range-row { display: flex; align-items: center; gap: 1rem; }
.range-row input[type="range"] { flex: 1; accent-color: var(--primary-color); }
.range-row .input { max-width: 160px; }
.range-hints { display: flex; justify-content: space-between; font-size: .78rem; color: var(--text-muted); margin-top: .35rem; }
.sim-main { padding-bottom: 1.25rem; border-bottom: 1px solid rgba(255,255,255,.2); margin-bottom: 1.25rem; }
.sim-main span { font-size: .85rem; opacity: .82; }
.sim-main strong { display: block; font-family: var(--font-heading); font-size: clamp(2rem, 5vw, 2.75rem); font-weight: 700; line-height: 1.1; }
.sim-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem 1.25rem; }
.sim-grid span { font-size: .8rem; opacity: .8; display: block; }
.sim-grid strong { font-size: 1.05rem; font-weight: 600; }
.sim-esforco { margin-top: 1.25rem; padding: .9rem 1rem; border-radius: var(--radius); background: rgba(255,255,255,.12); font-size: .88rem; }
.sim-esforco.ok { background: rgba(22,163,74,.25); }
.sim-esforco.warn { background: rgba(245,158,11,.28); }
.sim-esforco.bad { background: rgba(220,38,38,.28); }
.sim-results .btn { margin-top: 1.25rem; }
.sim-plano { margin-top: 1.25rem; max-height: 320px; overflow: auto; border-radius: var(--radius); background: rgba(255,255,255,.08); }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; border: 1px solid var(--border-color); border-radius: var(--radius); background: #fff; }
table.data { width: 100%; border-collapse: collapse; font-size: .9rem; min-width: 560px; }
table.data th, table.data td { padding: .75rem .9rem; text-align: left; border-bottom: 1px solid var(--border-color); white-space: nowrap; }
table.data th { font-weight: 600; background: var(--surface); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); }
table.data tr:last-child td { border-bottom: none; }

/* ===== Stats / KPI ===== */
.stat strong { display: block; font-family: var(--font-heading); font-size: 1.9rem; font-weight: 700; line-height: 1.1; color: var(--text-color); }
.stat span { font-size: .85rem; color: var(--text-muted); }
.kpi { background: #fff; border: 1px solid var(--border-color); border-radius: var(--radius); padding: 1.25rem 1.4rem; box-shadow: var(--shadow-sm); }
.kpi .kpi-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: .75rem; }
.kpi .kpi-ico { width: 2.4rem; height: 2.4rem; border-radius: 11px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary-color); }
.kpi strong { font-family: var(--font-heading); font-size: 1.5rem; display: block; }
.kpi span { font-size: .82rem; color: var(--text-muted); }

/* ===== Steps ===== */
.step { position: relative; padding-left: 3.5rem; }
.step-num {
    position: absolute; left: 0; top: 0;
    width: 2.5rem; height: 2.5rem; border-radius: 50%;
    display: grid; place-items: center; font-weight: 700; font-family: var(--font-heading);
    background: var(--primary-color); color: #fff;
}
.step h3 { font-size: 1.08rem; margin-bottom: .35rem; }
.step p { color: var(--text-muted); font-size: .93rem; }

/* ===== Alert ===== */
.alert { padding: .9rem 1.1rem; border-radius: var(--radius); font-size: .92rem; margin-bottom: 1rem; }
.alert-info { background: var(--primary-soft); color: var(--secondary-color); }
.alert-success { background: var(--success-soft); color: #15803d; }
.alert-error { background: var(--danger-soft); color: #b91c1c; }

/* ===== Footer ===== */
.site-footer { background: var(--surface); border-top: 1px solid var(--border-color); padding-block: 3.5rem 2rem; margin-top: 2rem; }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; } }
.footer-grid h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .07em; color: var(--text-muted); margin-bottom: 1rem; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: .6rem; font-size: .92rem; }
.footer-grid a:hover { color: var(--primary-color); }
.footer-bottom { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border-color); font-size: .82rem; color: var(--text-muted); display: flex; flex-wrap: wrap; gap: .75rem; justify-content: space-between; }

/* ===== Misc ===== */
.check-line { display: flex; gap: .7rem; align-items: flex-start; font-size: .93rem; color: var(--text-muted); }
.check-line i { color: var(--primary-color); margin-top: .25rem; }
.muted { color: var(--text-muted); }
.mono { font-variant-numeric: tabular-nums; }
.center { text-align: center; }
.hero-visual {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* ===== Exchange rate rows ===== */
.taxa-linha {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    padding: .55rem 0;
    border-bottom: 1px solid var(--border-color);
}
.taxa-linha:last-of-type { border-bottom: none; }
.taxa-linha strong { font-family: var(--font-heading); font-size: 1.05rem; }

/* ===== Chat & Tabs ===== */
.nav-tabs {
    -ms-overflow-style: none; scrollbar-width: none;
}
.nav-tabs::-webkit-scrollbar { display: none; }
.tab-btn {
    background: transparent; border: none; padding: .6rem 1rem; font-weight: 600; font-size: .95rem; color: var(--text-muted);
    cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; transition: color .2s, border-color .2s;
}
.tab-btn:hover { color: var(--primary-color); }
.tab-btn.active { color: var(--primary-color); border-bottom-color: var(--primary-color); }
.chat-container::-webkit-scrollbar { width: 6px; }
.chat-container::-webkit-scrollbar-thumb { background: rgba(0,0,0,.15); border-radius: 4px; }