/* ==========================================================================
   TIPlus Design System (Frontend Craft & Design Engineering)
   Archetype: Precision Engineering & High-Trust Enterprise Dark
   Interaction Physics: Emil Kowalski Framework
   ========================================================================== */

:root {
    /* 1. Canvas / Grounds */
    --bg-canvas: #090D15;
    --bg-surface: #0E1422;
    --bg-surface-elevated: #141B2D;
    --bg-surface-hover: #1A233A;
    --bg-subtle: #06090E;

    /* 2. Ink / Typography */
    --ink-title: #FFFFFF;
    --ink-body: #E2E8F0;
    --ink-muted: #94A3B8;
    --ink-dim: #64748B;

    /* 3. High-Precision Accents */
    --accent-blue: #2563EB;
    --accent-blue-hover: #1D4ED8;
    --accent-cyan: #0284C7;
    --accent-cyan-light: #38BDF8;
    --accent-emerald: #10B981;
    --accent-emerald-dim: rgba(16, 185, 129, 0.15);
    --whatsapp: #25D366;
    --whatsapp-hover: #20BA5A;

    /* 4. Structural Borders (Hairline Precision) */
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-medium: rgba(255, 255, 255, 0.14);
    --border-active: rgba(56, 189, 248, 0.35);

    /* 5. Typography Tokens (Bringhurst Scale) */
    --font-heading: 'Space Grotesk', system-ui, -apple-system, sans-serif;
    --font-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* 6. Interaction Curves & Timing (Emil Kowalski) */
    --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
    --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
    --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 160ms;
    --duration-standard: 240ms;

    /* 7. Radii & Layout */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --container-max: 1200px;
}

/* Base Reset & Box Sizing */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-canvas);
    color: var(--ink-body);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    background-image: 
        radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.07) 0%, transparent 65%),
        linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 100% 100%, 48px 48px, 48px 48px;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* Accessible Focus Rings */
:focus-visible {
    outline: 2px solid var(--accent-cyan-light);
    outline-offset: 3px;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

.section-bordered {
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background-color: rgba(14, 20, 34, 0.5);
}

/* Typography Hierarchy */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--ink-title);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.section-header {
    margin-bottom: 56px;
}

.section-header.center {
    text-align: center;
}

.section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent-cyan-light);
    margin-bottom: 12px;
}

.section-kicker::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-cyan-light);
}

.section-title {
    font-size: clamp(2rem, 3.5vw, 2.75rem);
    font-weight: 700;
    margin-bottom: 16px;
}

.section-lead {
    font-size: 1.125rem;
    color: var(--ink-muted);
    max-width: 65ch;
    margin: 0 auto;
    line-height: 1.6;
}

/* ==========================================================================
   Tactile Buttons (Emil Kowalski Physics: :active scale, custom easing)
   ========================================================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 26px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform var(--duration-fast) var(--ease-out),
                background-color var(--duration-fast) var(--ease-out),
                border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background-color: var(--accent-blue);
    color: #FFFFFF;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
}

@media (hover: hover) and (pointer: fine) {
    .btn-primary:hover {
        background-color: var(--accent-blue-hover);
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
        transform: translateY(-1px);
    }
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.04);
    color: var(--ink-body);
    border-color: var(--border-medium);
}

@media (hover: hover) and (pointer: fine) {
    .btn-secondary:hover {
        background-color: rgba(255, 255, 255, 0.08);
        border-color: rgba(255, 255, 255, 0.25);
        color: #FFFFFF;
        transform: translateY(-1px);
    }
}

.btn-whatsapp {
    background-color: var(--whatsapp);
    color: #FFFFFF;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.3);
}

@media (hover: hover) and (pointer: fine) {
    .btn-whatsapp:hover {
        background-color: var(--whatsapp-hover);
        box-shadow: 0 6px 22px rgba(37, 211, 102, 0.45);
        transform: translateY(-1px);
    }
}

.btn-block {
    width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(9, 13, 21, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 16px 0;
    transition: padding var(--duration-standard) var(--ease-out),
                background-color var(--duration-standard) var(--ease-out);
}

.navbar.scrolled {
    padding: 10px 0;
    background-color: rgba(9, 13, 21, 0.96);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.brand-link img, .brand-link svg {
    height: 38px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-item {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--ink-muted);
    transition: color var(--duration-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
    .nav-item:hover {
        color: var(--ink-title);
    }
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-nav {
    padding: 9px 18px;
    font-size: 0.875rem;
}

.mobile-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border-medium);
    color: var(--ink-title);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.1rem;
}

/* ==========================================================================
   Hero Section & Live Telemetry Console
   ========================================================================== */

.hero-section {
    padding-top: 150px;
    padding-bottom: 90px;
    position: relative;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--ink-body);
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-medium);
    padding: 6px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 24px;
}

.status-dot-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-emerald);
    position: relative;
}

.status-dot-pulse::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border-radius: 50%;
    border: 1px solid var(--accent-emerald);
    animation: pulseRing 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulseRing {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(2.4); opacity: 0; }
}

.hero-title {
    font-size: clamp(2.4rem, 4.2vw, 3.4rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--ink-title);
}

.hero-title .accent-text {
    color: var(--accent-cyan-light);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--ink-muted);
    line-height: 1.65;
    margin-bottom: 32px;
    max-width: 58ch;
}

.hero-cta-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-trust-bar {
    display: flex;
    align-items: center;
    gap: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
}

.trust-item {
    display: flex;
    flex-direction: column;
}

.trust-val {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--ink-title);
}

.trust-label {
    font-size: 0.775rem;
    color: var(--ink-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.trust-sep {
    width: 1px;
    height: 36px;
    background-color: var(--border-subtle);
}

/* Live Telemetry Console (Hero's Live Interactive Device) */
.telemetry-console {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.console-header {
    background-color: var(--bg-subtle);
    padding: 12px 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-subtle);
}

.console-traffic-lights {
    display: flex;
    gap: 6px;
}

.console-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.console-dot.red { background-color: #EF4444; }
.console-dot.yellow { background-color: #F59E0B; }
.console-dot.green { background-color: #10B981; }

.console-title-bar {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.console-live-badge {
    background-color: var(--accent-emerald-dim);
    color: var(--accent-emerald);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
}

/* Console View Tabs */
.console-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-subtle);
    background-color: rgba(255, 255, 255, 0.02);
}

.console-tab {
    flex: 1;
    padding: 10px 14px;
    background: none;
    border: none;
    color: var(--ink-muted);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    cursor: pointer;
    text-align: center;
    border-bottom: 2px solid transparent;
    transition: all var(--duration-fast) var(--ease-out);
}

.console-tab.active {
    color: var(--accent-cyan-light);
    border-bottom-color: var(--accent-cyan-light);
    background-color: rgba(255, 255, 255, 0.04);
}

.console-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.server-rack-node {
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.server-rack-node:hover {
    border-color: var(--border-active);
}

.rack-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.rack-os-icon {
    width: 36px;
    height: 36px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    background-color: rgba(255, 255, 255, 0.05);
}

.rack-os-icon.linux { color: #F59E0B; background-color: rgba(245, 158, 11, 0.1); }
.rack-os-icon.windows { color: #38BDF8; background-color: rgba(56, 189, 248, 0.1); }
.rack-os-icon.firewall { color: #10B981; background-color: rgba(16, 185, 129, 0.1); }

.rack-details strong {
    display: block;
    font-size: 0.925rem;
    color: var(--ink-title);
}

.rack-details small {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
}

.rack-status-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.rack-status-tag.online {
    color: #10B981;
    background-color: rgba(16, 185, 129, 0.12);
}

.console-terminal-strip {
    background-color: #05070B;
    border-top: 1px solid var(--border-subtle);
    padding: 10px 16px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-dim);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.console-terminal-strip span.ping {
    color: var(--accent-emerald);
}

/* ==========================================================================
   Tech Ecosystem Bar
   ========================================================================== */

.ecosystem-section {
    padding: 36px 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background-color: rgba(6, 9, 14, 0.6);
}

.ecosystem-label {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-dim);
    margin-bottom: 20px;
}

.ecosystem-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.tech-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    color: var(--ink-muted);
    transition: all var(--duration-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
    .tech-chip:hover {
        background-color: rgba(255, 255, 255, 0.07);
        border-color: rgba(255, 255, 255, 0.2);
        color: var(--ink-title);
        transform: translateY(-1px);
    }
}

/* ==========================================================================
   Editorial "Quem Somos" & Engineering Pillars
   ========================================================================== */

.about-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.about-narrative h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    margin-bottom: 20px;
}

.about-narrative p {
    color: var(--ink-muted);
    margin-bottom: 18px;
    font-size: 1.05rem;
    line-height: 1.7;
}

.about-credentials {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.credential-box {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.credential-box:hover {
    border-color: var(--border-medium);
}

.credential-box i {
    font-size: 1.5rem;
    color: var(--accent-cyan-light);
    margin-bottom: 14px;
    display: block;
}

.credential-box h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.credential-box p {
    font-size: 0.875rem;
    color: var(--ink-muted);
    line-height: 1.5;
}

/* ==========================================================================
   Solutions Section (Asymmetrical High-Craft Cards)
   ========================================================================== */

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.solution-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: border-color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out);
}

@media (hover: hover) and (pointer: fine) {
    .solution-card:hover {
        border-color: var(--border-active);
        transform: translateY(-2px);
    }
}

.solution-card-header {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 18px;
}

.solution-icon-wrap {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--accent-cyan-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.solution-card h3 {
    font-size: 1.35rem;
    margin-bottom: 6px;
}

.solution-card p.summary {
    color: var(--ink-muted);
    font-size: 0.95rem;
    margin-bottom: 22px;
    line-height: 1.6;
}

.solution-features {
    border-top: 1px solid var(--border-subtle);
    padding-top: 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.solution-features li {
    font-size: 0.875rem;
    color: var(--ink-body);
    display: flex;
    align-items: center;
    gap: 10px;
}

.solution-features li i {
    color: var(--accent-emerald);
    font-size: 0.8rem;
}

/* ==========================================================================
   Interactive ROI & Cost Optimization Simulator (The Tactile Device)
   ========================================================================== */

.calc-container {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.calc-controls {
    padding: 44px;
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.calc-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.calc-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.calc-group label {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--ink-title);
}

.calc-live-val {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent-cyan-light);
    background-color: rgba(56, 189, 248, 0.1);
    padding: 2px 10px;
    border-radius: 4px;
}

/* Custom Range Input */
input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: #1A2338;
    outline: none;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-cyan-light);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.5);
    transition: transform var(--duration-fast) var(--ease-out);
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.calc-select {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-medium);
    color: var(--ink-title);
    border-radius: var(--radius-sm);
    cursor: pointer;
    outline: none;
}

.calc-select:focus {
    border-color: var(--accent-cyan-light);
}

.calc-display-panel {
    background-color: var(--bg-surface-elevated);
    border-left: 1px solid var(--border-subtle);
    padding: 44px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.calc-display-top h4 {
    font-size: 0.85rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    color: var(--ink-muted);
    letter-spacing: 0.05em;
    margin-bottom: 12px;
}

.calc-big-number {
    font-family: var(--font-mono);
    font-size: clamp(2.2rem, 3.5vw, 2.9rem);
    font-weight: 800;
    color: var(--accent-emerald);
    line-height: 1.1;
    margin-bottom: 14px;
}

.calc-breakdown {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 24px;
}

.breakdown-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.breakdown-row span.val {
    font-family: var(--font-mono);
    color: var(--ink-body);
}

/* ==========================================================================
   Implementation Methodology (Zero-Downtime Migration)
   ========================================================================== */

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.methodology-step {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 26px;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.step-phase-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan-light);
    margin-bottom: 14px;
    display: block;
}

.methodology-step h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.methodology-step p {
    font-size: 0.875rem;
    color: var(--ink-muted);
    line-height: 1.6;
}

/* ==========================================================================
   FAQ Accordions (Emil Kowalski Smooth Transitions)
   ========================================================================== */

.faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.faq-item.active {
    border-color: var(--border-active);
}

.faq-trigger {
    width: 100%;
    padding: 20px 24px;
    background: none;
    border: none;
    color: var(--ink-title);
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
}

.faq-icon {
    font-size: 0.85rem;
    color: var(--ink-muted);
    transition: transform var(--duration-standard) var(--ease-spring);
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
    color: var(--accent-cyan-light);
}

.faq-drawer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--duration-standard) var(--ease-out),
                opacity var(--duration-standard) ease;
    opacity: 0;
}

.faq-item.active .faq-drawer {
    opacity: 1;
}

.faq-drawer p {
    padding: 0 24px 22px 24px;
    color: var(--ink-muted);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ==========================================================================
   Contact & B2B Diagnosis Form
   ========================================================================== */

.contact-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 48px;
    align-items: flex-start;
}

.contact-info-block {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-channel {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.channel-icon {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--accent-cyan-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.channel-details strong {
    display: block;
    font-size: 0.95rem;
    color: var(--ink-title);
    margin-bottom: 2px;
}

.channel-details span, .channel-details a {
    font-size: 0.9rem;
    color: var(--ink-muted);
}

.contact-card-form {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    padding: 36px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.contact-card-form h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
}

.contact-card-form p.subtext {
    font-size: 0.9rem;
    color: var(--ink-muted);
    margin-bottom: 24px;
}

.form-grid {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-row label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--ink-title);
}

.form-row input, .form-row select {
    width: 100%;
    padding: 12px 14px;
    background-color: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--ink-title);
    outline: none;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.form-row input:focus, .form-row select:focus {
    border-color: var(--accent-cyan-light);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
    border-top: 1px solid var(--border-subtle);
    background-color: var(--bg-subtle);
    padding: 64px 0 32px 0;
}

.footer-columns {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-bio p {
    color: var(--ink-muted);
    font-size: 0.9rem;
    margin-top: 16px;
    max-width: 40ch;
    line-height: 1.6;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-title);
    margin-bottom: 16px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col ul a {
    color: var(--ink-muted);
    font-size: 0.875rem;
    transition: color var(--duration-fast) var(--ease-out);
}

.footer-col ul a:hover {
    color: var(--ink-title);
}

.footer-bottom-strip {
    border-top: 1px solid var(--border-subtle);
    padding-top: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--ink-dim);
}

.footer-bottom-strip span.bahia {
    color: var(--accent-emerald);
}

/* ==========================================================================
   Floating Action Widget (WhatsApp)
   ========================================================================== */

.floating-whatsapp {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--whatsapp);
    color: #FFFFFF;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    box-shadow: 0 8px 24px rgba(37, 211, 102, 0.45);
    z-index: 999;
    transition: transform var(--duration-fast) var(--ease-spring),
                background-color var(--duration-fast) var(--ease-out);
}

.floating-whatsapp:active {
    transform: scale(0.92);
}

@media (hover: hover) and (pointer: fine) {
    .floating-whatsapp:hover {
        transform: scale(1.08);
        background-color: var(--whatsapp-hover);
    }
}

/* ==========================================================================
   Responsive Breakpoints (Mobile Thumb & Ergonomics Test)
   ========================================================================== */

@media (max-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-split {
        grid-template-columns: 1fr;
    }
    
    .calc-container {
        grid-template-columns: 1fr;
    }
    
    .calc-display-panel {
        border-left: none;
        border-top: 1px solid var(--border-subtle);
    }
    
    .methodology-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-layout {
        grid-template-columns: 1fr;
    }
    
    .footer-columns {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .section-padding {
        padding: 70px 0;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-toggle {
        display: inline-flex;
    }
    
    .nav-links.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-surface);
        border-bottom: 1px solid var(--border-medium);
        padding: 24px;
        gap: 18px;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
    }
    
    .methodology-grid {
        grid-template-columns: 1fr;
    }
    
    .about-credentials {
        grid-template-columns: 1fr;
    }
    
    .hero-trust-bar {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .trust-sep {
        display: none;
    }
    
    .calc-controls, .calc-display-panel {
        padding: 24px;
    }
}

/* Reduced Motion Preference */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}