/* ==================================================================
   SoluPREV — Design System
   
   Typography: DM Serif Display (headings) + DM Sans (body)
   Colors: Professional navy + warm gold — trust & premium
   Spacing: 4/8dp incremental system
   Breakpoints: 375 / 768 / 1024 / 1440
   ================================================================== */

/* ===== RESET ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== DESIGN TOKENS ===== */
:root {
    /* Color — Semantic tokens */
    --color-primary: #1B4D7A;
    --color-primary-dark: #12364F;
    --color-primary-light: #2968A0;
    --color-primary-surface: rgba(27, 77, 122, 0.06);
    --color-primary-surface-hover: rgba(27, 77, 122, 0.1);

    --color-accent: #C9982E;
    --color-accent-light: #DFBD60;
    --color-accent-surface: rgba(201, 152, 46, 0.1);

    --color-on-primary: #FFFFFF;
    --color-on-accent: #1A1A1A;

    --color-surface: #FFFFFF;
    --color-surface-alt: #F7F8FA;
    --color-surface-elevated: #FFFFFF;

    --color-text-primary: #111827;
    --color-text-secondary: #4B5563;
    --color-text-muted: #9CA3AF;

    --color-border: #E5E7EB;
    --color-border-hover: #D1D5DB;

    --color-success: #059669;
    --color-error: #DC2626;

    /* Typography — Scale (rem, base 16px) */
    --font-display: 'DM Serif Display', Georgia, serif;
    --font-body: 'DM Sans', system-ui, -apple-system, sans-serif;

    --text-xs: 0.75rem;    /* 12px */
    --text-sm: 0.875rem;   /* 14px */
    --text-base: 1rem;     /* 16px */
    --text-lg: 1.125rem;   /* 18px */
    --text-xl: 1.25rem;    /* 20px */
    --text-2xl: 1.5rem;    /* 24px */
    --text-3xl: 2rem;      /* 32px */
    --text-4xl: 2.5rem;    /* 40px */
    --text-5xl: 3.25rem;   /* 52px */

    --leading-tight: 1.2;
    --leading-normal: 1.6;
    --leading-relaxed: 1.75;

    /* Spacing — 4/8dp scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows — Consistent elevation scale */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.06);

    /* Motion — 150-300ms, ease-out for enter, ease-in for exit */
    --duration-fast: 150ms;
    --duration-normal: 200ms;
    --duration-slow: 300ms;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

    /* Z-index scale */
    --z-base: 0;
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-overlay: 40;
    --z-modal: 100;
    --z-fab: 50;
    --z-toast: 1000;
}

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

/* ===== BASE ===== */
html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--space-20);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text-primary);
    background: var(--color-surface);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
    font-family: var(--font-display);
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
}

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

img, svg {
    display: block;
    max-width: 100%;
}

ul, ol { list-style: none; }

/* ===== SKIP LINK ===== */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: var(--color-primary);
    color: var(--color-on-primary);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 600;
    z-index: var(--z-toast);
    transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
    top: var(--space-4);
}

/* ===== LAYOUT ===== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.section {
    padding: var(--space-24) 0;
}

.section-alt {
    background: var(--color-surface-alt);
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out);
}

.header.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-xs);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-xl);
    color: var(--color-primary);
    font-weight: 500;
}

.logo strong { font-weight: 700; }

.logo-icon {
    color: var(--color-accent);
    flex-shrink: 0;
}

/* Nav */
.nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-link {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--duration-fast) var(--ease-out),
                background var(--duration-fast) var(--ease-out);
    min-height: 44px;
    display: inline-flex;
    align-items: center;
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--color-primary);
    background: var(--color-primary-surface);
}

.nav-cta {
    background: var(--color-primary);
    color: var(--color-on-primary);
    margin-left: var(--space-2);
    font-weight: 600;
    border-radius: var(--radius-md);
}

.nav-cta:hover,
.nav-cta:focus-visible {
    background: var(--color-primary-dark);
    color: var(--color-on-primary);
}

/* Mobile toggle */
.menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-primary);
    border-radius: var(--radius-sm);
    transition: background var(--duration-fast) var(--ease-out);
}

.menu-toggle:hover { background: var(--color-primary-surface); }
.menu-toggle:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    min-height: 44px;
    transition: background var(--duration-fast) var(--ease-out),
                color var(--duration-fast) var(--ease-out),
                border-color var(--duration-fast) var(--ease-out),
                transform var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

.btn-primary {
    background: var(--color-primary);
    color: var(--color-on-primary);
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
}

.btn-ghost {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-border);
}

.btn-ghost:hover {
    background: var(--color-primary-surface);
    border-color: var(--color-primary);
}

.btn-accent {
    background: var(--color-accent);
    color: var(--color-on-accent);
    border-color: var(--color-accent);
}

.btn-accent:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent-light);
    box-shadow: 0 4px 16px rgba(201, 152, 46, 0.3);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    min-height: 52px;
    border-radius: var(--radius-lg);
}

.btn-full { width: 100%; }

/* ===== SECTION COMMON ===== */
.section-tag {
    display: inline-block;
    padding: var(--space-1) var(--space-4);
    background: var(--color-primary-surface);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-4);
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-16);
}

.section-header h2 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-3);
}

.section-header p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
}

/* ===== HERO ===== */
.hero {
    position: relative;
    padding: 140px 0 var(--space-20);
    background: linear-gradient(160deg, #F0F5FA 0%, #EAF0F8 40%, #F6F1E6 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 75% 20%, rgba(27, 77, 122, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 50% 60% at 15% 80%, rgba(201, 152, 46, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero .container {
    position: relative;
}

.hero-content {
    max-width: 640px;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-5);
    background: var(--color-primary-surface);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-6);
}

.hero h1 {
    font-size: var(--text-5xl);
    margin-bottom: var(--space-5);
}

.text-accent {
    color: var(--color-primary);
    position: relative;
}

.text-accent::after {
    content: '';
    position: absolute;
    bottom: 6px;
    left: 0;
    right: 0;
    height: 10px;
    background: var(--color-accent-surface);
    border-radius: 4px;
    z-index: -1;
}

.hero-text {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 540px;
    line-height: var(--leading-relaxed);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-bottom: var(--space-16);
}

/* Stats */
.hero-stats {
    display: flex;
    gap: var(--space-6);
}

.stat-card {
    display: flex;
    flex-direction: column;
    padding: var(--space-5) var(--space-6);
    background: var(--color-surface-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    min-width: 160px;
}

.stat-number {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    color: var(--color-primary);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-1);
}

/* ===== SOBRE ===== */
.sobre-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: var(--space-16);
    align-items: center;
}

.sobre-visual {
    position: relative;
}

.sobre-image {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.sobre-image-inner {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.5);
    gap: var(--space-3);
    font-size: var(--text-sm);
}

.sobre-badge-card {
    position: absolute;
    bottom: -20px;
    right: -16px;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: var(--color-surface-elevated);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.sobre-badge-card svg { color: var(--color-accent); flex-shrink: 0; }
.sobre-badge-card strong { display: block; font-size: var(--text-sm); }
.sobre-badge-card span { font-size: var(--text-xs); color: var(--color-text-muted); }

.sobre-content h2 {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-5);
}

.sobre-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    line-height: var(--leading-relaxed);
}

.sobre-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
    margin-top: var(--space-6);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-primary);
}

.feature-item svg {
    color: var(--color-accent);
    flex-shrink: 0;
}

/* ===== CARDS — Reusable ===== */
.card {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: transform var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out),
                border-color var(--duration-normal) var(--ease-out);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border-hover);
}

/* ===== SERVIÇOS ===== */
.servicos-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

.servico-card {
    padding: var(--space-8) var(--space-6);
}

.card-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-surface);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-5);
    color: var(--color-primary);
}

.servico-card h3 {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.servico-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    flex: 1;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    transition: gap var(--duration-fast) ease, color var(--duration-fast) ease;
}

.card-link:hover {
    color: var(--color-primary-dark);
    gap: var(--space-3);
}

.servico-card {
    display: flex;
    flex-direction: column;
}

/* ===== COMO FUNCIONA ===== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
    counter-reset: step;
}

.step-card {
    text-align: center;
    padding: var(--space-8) var(--space-5);
    position: relative;
}

.step-card::after {
    content: '';
    position: absolute;
    top: 48px;
    right: -12px;
    width: 24px;
    height: 2px;
    background: var(--color-border);
}

.step-card:last-child::after { display: none; }

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-on-primary);
    font-family: var(--font-display);
    font-size: var(--text-xl);
    margin-bottom: var(--space-5);
}

.step-card h3 {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.step-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ===== DEPOIMENTOS ===== */
.depoimentos-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
}

.depoimento-card {
    padding: var(--space-8);
}

.depoimento-stars {
    display: flex;
    gap: 2px;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.depoimento-card > p {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    font-style: italic;
}

.depoimento-author {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.depoimento-author cite {
    display: block;
    font-size: var(--text-sm);
    font-weight: 700;
    font-style: normal;
}

.depoimento-author span {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* ===== CTA ===== */
.cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    padding: var(--space-20) 0;
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: var(--text-3xl);
    color: var(--color-on-primary);
    margin-bottom: var(--space-4);
}

.cta-content p {
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--text-lg);
    margin-bottom: var(--space-8);
    line-height: var(--leading-relaxed);
}

/* ===== CONTATO ===== */
.contato-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: var(--space-12);
    align-items: start;
}

.contato-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.info-card {
    display: flex;
    gap: var(--space-4);
    align-items: flex-start;
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    transition: border-color var(--duration-fast) var(--ease-out);
}

.info-card:hover { border-color: var(--color-primary-surface-hover); }

.info-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-surface);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    flex-shrink: 0;
}

.info-card h4 {
    font-size: var(--text-sm);
    font-weight: 700;
    margin-bottom: var(--space-1);
}

.info-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: var(--leading-normal);
}

/* Form */
.contato-form {
    background: var(--color-surface-elevated);
    padding: var(--space-10);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--color-text-primary);
}

.required { color: var(--color-error); }

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-surface);
    min-height: 48px;
    transition: border-color var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-surface);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.field-error {
    display: block;
    font-size: var(--text-xs);
    color: var(--color-error);
    margin-top: var(--space-1);
    min-height: 18px;
}

/* Submit spinner */
.btn-spinner {
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== FOOTER ===== */
.footer {
    background: #0C1625;
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-16) 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--space-12);
    padding-bottom: var(--space-12);
}

.footer-brand .logo {
    color: var(--color-on-primary);
    margin-bottom: var(--space-4);
}

.footer-brand p {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    max-width: 280px;
}

.footer-links h4 {
    color: var(--color-on-primary);
    font-size: var(--text-sm);
    font-weight: 700;
    margin-bottom: var(--space-5);
}

.footer-links a {
    display: block;
    padding: var(--space-1) 0;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.55);
    transition: color var(--duration-fast) var(--ease-out);
}

.footer-links a:hover { color: var(--color-accent); }
.footer-links a:focus-visible { outline: 1px solid var(--color-accent); outline-offset: 2px; }

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--space-5) 0;
    text-align: center;
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.4);
}

/* ===== WHATSAPP FAB ===== */
.whatsapp-fab {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    width: 56px;
    height: 56px;
    background: #25D366;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(37, 211, 102, 0.35);
    z-index: var(--z-fab);
    transition: transform var(--duration-fast) var(--ease-out),
                box-shadow var(--duration-fast) var(--ease-out);
}

.whatsapp-fab:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 24px rgba(37, 211, 102, 0.5);
}

.whatsapp-fab:focus-visible {
    outline: 2px solid #25D366;
    outline-offset: 4px;
}

.whatsapp-fab:active {
    transform: scale(0.95);
}

/* ===== SCROLL ANIMATIONS ===== */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--duration-slow) var(--ease-out),
                transform var(--duration-slow) var(--ease-out);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > .reveal:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger > .reveal:nth-child(2) { transition-delay: 50ms; }
.reveal-stagger > .reveal:nth-child(3) { transition-delay: 100ms; }
.reveal-stagger > .reveal:nth-child(4) { transition-delay: 150ms; }
.reveal-stagger > .reveal:nth-child(5) { transition-delay: 200ms; }
.reveal-stagger > .reveal:nth-child(6) { transition-delay: 250ms; }
.reveal-stagger > .reveal:nth-child(7) { transition-delay: 300ms; }
.reveal-stagger > .reveal:nth-child(8) { transition-delay: 350ms; }

/* ===== NOTIFICATION / TOAST ===== */
.toast {
    position: fixed;
    top: 92px;
    right: var(--space-6);
    padding: var(--space-4) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 500;
    z-index: var(--z-toast);
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    transform: translateX(calc(100% + 32px));
    transition: transform var(--duration-slow) var(--ease-out);
    color: var(--color-on-primary);
}

.toast[aria-live] { /* ensure specificity for toast */ }

.toast.toast-visible {
    transform: translateX(0);
}

.toast-success { background: var(--color-success); }
.toast-error { background: var(--color-error); }

/* ===== RESPONSIVE — Mobile First ===== */

/* ≤768px: Mobile */
@media (max-width: 768px) {
    .menu-toggle { display: flex; }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: var(--space-6);
        gap: var(--space-1);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        transition: transform var(--duration-slow) var(--ease-out);
        z-index: var(--z-overlay);
    }

    .nav.open { transform: translateY(0); }

    .nav-link {
        width: 100%;
        padding: var(--space-3) var(--space-4);
    }

    .nav-cta {
        text-align: center;
        margin-left: 0;
        margin-top: var(--space-2);
    }

    .hero {
        padding: 120px 0 var(--space-16);
    }

    .hero h1 {
        font-size: var(--text-3xl);
    }

    .hero-text {
        font-size: var(--text-base);
    }

    .hero-actions {
        flex-direction: column;
        margin-bottom: var(--space-10);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--space-3);
    }

    .stat-card {
        flex-direction: row;
        align-items: center;
        gap: var(--space-4);
        min-width: unset;
    }

    .section {
        padding: var(--space-16) 0;
    }

    .section-header {
        margin-bottom: var(--space-10);
    }

    .section-header h2 {
        font-size: var(--text-2xl);
    }

    .sobre-grid {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .sobre-badge-card {
        position: relative;
        bottom: auto;
        right: auto;
        margin-top: var(--space-4);
    }

    .sobre-features {
        grid-template-columns: 1fr;
    }

    .servicos-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .step-card::after { display: none; }

    .step-card {
        text-align: left;
        display: flex;
        gap: var(--space-4);
        padding: var(--space-5);
        background: var(--color-surface-alt);
        border-radius: var(--radius-lg);
    }

    .step-number {
        width: 48px;
        height: 48px;
        font-size: var(--text-base);
        flex-shrink: 0;
        margin-bottom: 0;
    }

    .depoimentos-grid {
        grid-template-columns: 1fr;
    }

    .cta {
        padding: var(--space-16) 0;
    }

    .cta-content h2 {
        font-size: var(--text-2xl);
    }

    .contato-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contato-form {
        padding: var(--space-6);
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
}

/* ≤1024px: Tablet */
@media (max-width: 1024px) and (min-width: 769px) {
    .servicos-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .step-card:nth-child(2)::after { display: none; }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }

    .hero h1 {
        font-size: var(--text-4xl);
    }
}

/* ≤480px: Small phone */
@media (max-width: 480px) {
    .hero h1 {
        font-size: var(--text-2xl);
    }

    .container {
        padding: 0 var(--space-4);
    }

    .hero-badge {
        font-size: var(--text-xs);
    }
}