/* =====================================================
   Design System ViaON — v2.0
   Tipografia: Inter | Estilo: Premium Glassmorphism
   ===================================================== */
:root {
    /* Marca */
    --viaon-primary: #FF6600;
    --viaon-secondary: #003366;
    --viaon-accent-light: rgba(255, 102, 0, 0.12);

    /* Gradiente da marca (hero headline + shimmer) */
    --brand-gradient: linear-gradient(135deg, #FF6600 0%, #ff3d00 50%, #cc2900 100%);
    --brand-gradient-alt: linear-gradient(135deg, #FF6600 0%, #ff9900 100%);

    /* Superfície — Light */
    --bg-color: #f5f6f8;
    --bg-subtle: #eef0f4;
    --text-primary: #111214;
    --text-secondary: #6e6e73;
    /* ratio 4.6:1 WCAG AA ✅ */
    --text-muted: #9a9aA0;

    /* Glassmorphism Light */
    --card-bg: rgba(255, 255, 255, 0.72);
    --card-border: rgba(255, 255, 255, 0.55);
    --card-border-hover: rgba(255, 102, 0, 0.45);
    --header-bg: rgba(250, 250, 252, 0.80);
    --input-bg: rgba(255, 255, 255, 0.80);

    /* Sombras em camadas */
    --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.05), 0 2px 6px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.07), 0 4px 12px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 16px 40px rgba(255, 102, 0, 0.14), 0 6px 16px rgba(255, 102, 0, 0.08);
    --shadow-focus: 0 0 0 4px rgba(255, 102, 0, 0.18);

    /* Fundo pontilhado */
    --dot-color: rgba(0, 0, 0, 0.035);

    /* Glows animados */
    --glow-1: rgba(255, 102, 0, 0.14);
    --glow-2: rgba(0, 51, 102, 0.09);

    /* Espaçamento em escala 8pt */
    --space-1: 0.25rem;
    /*  4px */
    --space-2: 0.5rem;
    /*  8px */
    --space-3: 0.75rem;
    /* 12px */
    --space-4: 1rem;
    /* 16px */
    --space-5: 1.5rem;
    /* 24px */
    --space-6: 2rem;
    /* 32px */
    --space-8: 3rem;
    /* 48px */
    --space-10: 4rem;
    /* 64px */
    --space-12: 5rem;
    /* 80px */

    /* Raios de borda */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Transições */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-smooth: cubic-bezier(0.25, 1, 0.5, 1);
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 400ms;

    /* Aplicação da marca */
    --accent-color: var(--viaon-primary);
    --accent-hover: #e05500;
    --icon-bg-fallback: var(--viaon-accent-light);
}

[data-theme="dark"] {
    /* Superfície — Dark */
    --bg-color: #0a0a0c;
    --bg-subtle: #111115;
    --text-primary: #f2f2f7;
    --text-secondary: #98989f;
    --text-muted: #636366;

    /* Glassmorphism Dark */
    --card-bg: rgba(22, 22, 26, 0.55);
    --card-border: rgba(255, 255, 255, 0.07);
    --card-border-hover: rgba(255, 102, 0, 0.5);
    --header-bg: rgba(12, 12, 15, 0.82);
    --input-bg: rgba(22, 22, 26, 0.70);

    /* Sombras dark */
    --shadow-xs: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 16px 40px rgba(255, 102, 0, 0.18), 0 6px 16px rgba(255, 102, 0, 0.10);
    --shadow-focus: 0 0 0 4px rgba(255, 102, 0, 0.22);

    --dot-color: rgba(255, 255, 255, 0.04);
    --glow-1: rgba(255, 102, 0, 0.09);
    --glow-2: rgba(0, 102, 204, 0.07);

    --accent-color: #ff7a2b;
    --accent-hover: #ff9a5c;
    --icon-bg-fallback: rgba(255, 102, 0, 0.12);
    --brand-gradient: linear-gradient(135deg, #ff7a2b 0%, #ff4500 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-color);
    background-image: radial-gradient(var(--dot-color) 1px, transparent 1px);
    background-size: 22px 22px;
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--duration-slow) ease, color var(--duration-slow) ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

/* Orbs de fundo animados */
body::before,
body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    z-index: -1;
    filter: blur(100px);
    opacity: 0.7;
    animation: floatGlow 18s infinite alternate ease-in-out;
    pointer-events: none;
    will-change: transform;
}

body::before {
    top: -15%;
    left: -10%;
    width: 55vw;
    height: 55vw;
    background: var(--glow-1);
    animation-duration: 18s;
}

body::after {
    bottom: -15%;
    right: -10%;
    width: 45vw;
    height: 45vw;
    background: var(--glow-2);
    animation-duration: 24s;
    animation-direction: alternate-reverse;
}

@keyframes floatGlow {
    0% {
        transform: translate(0, 0) scale(1);
    }

    50% {
        transform: translate(5%, 8%) scale(1.08);
    }

    100% {
        transform: translate(12%, 18%) scale(1.18);
    }
}

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

/* ================== ACESSIBILIDADE ================== */
.skip-link {
    position: absolute;
    top: -999px;
    left: var(--space-4);
    background: var(--accent-color);
    color: #fff;
    padding: var(--space-2) var(--space-5);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
    z-index: 9999;
    transition: top 0.1s;
}

.skip-link:focus {
    top: 0;
    outline: 3px solid var(--viaon-secondary);
    outline-offset: 2px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:focus-visible {
    outline: 2.5px solid var(--accent-color);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* ================== HEADER ================== */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    /* Isola o contexto de empilhamento do header — evita conflito com camadas dos cards */
    isolation: isolate;
    background-color: var(--header-bg);
    backdrop-filter: saturate(200%) blur(24px);
    -webkit-backdrop-filter: saturate(200%) blur(24px);
    border-bottom: 1px solid var(--card-border);
    padding: 0 var(--space-6);
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: border-color var(--duration-slow);
}

.logo {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 0.15em;
}

.logo-via {
    color: var(--text-primary);
}

.logo-on {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-hub {
    color: var(--text-secondary);
    font-weight: 500;
    margin-left: 0.15em;
    font-size: 0.95em;
}

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

/* ================== DROPDOWN ================== */
.dropdown {
    position: relative;
}

.dropdown-btn {
    background: none;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-full);
    transition: background-color var(--duration-fast), color var(--duration-fast), border-color var(--duration-fast);
}

.dropdown-btn:hover,
.dropdown.active .dropdown-btn {
    background-color: var(--icon-bg-fallback);
    color: var(--accent-color);
    border-color: var(--card-border);
}

.dropdown-btn svg {
    transition: transform var(--duration-base) var(--ease-smooth);
}

.dropdown.active .dropdown-btn svg {
    transform: rotate(180deg);
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    background-color: var(--card-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    min-width: 210px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--card-border);
    overflow: hidden;
    animation: dropIn 0.2s var(--ease-smooth);
    padding: var(--space-2) 0;
}

@keyframes dropIn {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.dropdown-content a {
    display: flex;
    align-items: center;
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: background-color var(--duration-fast), color var(--duration-fast);
    gap: var(--space-3);
}

.dropdown-content a::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-color);
    opacity: 0;
    transition: opacity var(--duration-fast);
    flex-shrink: 0;
}

.dropdown-content a:hover {
    background-color: var(--icon-bg-fallback);
    color: var(--accent-color);
}

.dropdown-content a:hover::before {
    opacity: 1;
}

/* Categorias dentro do dropdown */
.dropdown-label {
    padding: var(--space-3) var(--space-4) var(--space-1);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    cursor: default;
}

.dropdown-divider {
    height: 1px;
    background-color: var(--card-border);
    margin: var(--space-2) 0;
    opacity: 0.5;
}

.dropdown.active .dropdown-content {
    display: block;
}

/* ================== TEMA TOGGLE ================== */
.theme-toggle {
    background: none;
    border: 1px solid var(--card-border);
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    transition: background-color var(--duration-fast), color var(--duration-fast), border-color var(--duration-fast), transform var(--duration-base) var(--ease-spring);
}

.theme-toggle:hover {
    background-color: var(--icon-bg-fallback);
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: rotate(20deg);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

/* ================== MAIN & HERO ================== */
main {
    flex: 1;
    padding: var(--space-12) var(--space-6) var(--space-10);
    max-width: 1280px;
    margin: 0 auto;
    width: 100%;
}

.hero {
    text-align: center;
    margin-bottom: var(--space-10);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--icon-bg-fallback);
    color: var(--accent-color);
    border: 1px solid rgba(255, 102, 0, 0.2);
    border-radius: var(--radius-full);
    padding: var(--space-1) var(--space-3);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: var(--space-4);
    animation: fadeSlideUp 0.6s var(--ease-smooth) both;
}

.hero-badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(0.75);
    }
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 1.1;
    margin-bottom: var(--space-4);
    animation: fadeSlideUp 0.6s 0.1s var(--ease-smooth) both;
}

.hero h1 .highlight {
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: var(--space-8);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeSlideUp 0.6s 0.2s var(--ease-smooth) both;
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ================== SEARCH BAR ================== */
.search-wrapper {
    max-width: 580px;
    margin: 0 auto;
    animation: fadeSlideUp 0.6s 0.3s var(--ease-smooth) both;
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    padding: 1rem var(--space-6) 1rem 3.2rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 400;
    border-radius: var(--radius-xl);
    border: 1.5px solid var(--card-border);
    background-color: var(--input-bg);
    color: var(--text-primary);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-sm);
    transition: border-color var(--duration-base), box-shadow var(--duration-base);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.search-input::-webkit-search-cancel-button {
    -webkit-appearance: none;
}

.search-input:focus {
    border-color: var(--accent-color);
    box-shadow: var(--shadow-sm), var(--shadow-focus);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 18px;
    height: 18px;
    pointer-events: none;
    transition: color var(--duration-fast);
}

.search-container:focus-within .search-icon {
    color: var(--accent-color);
}

.search-shortcut {
    position: absolute;
    right: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-subtle);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: var(--radius-sm);
    pointer-events: none;
    letter-spacing: 0.03em;
    transition: opacity var(--duration-base);
}

.search-input:not(:placeholder-shown)+.search-shortcut,
.search-container:focus-within .search-shortcut {
    opacity: 0;
}

/* ================== GRID & CARDS ================== */
.grid-section {
    margin-top: var(--space-4);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-5);
    /* Isola repaints dos cards do resto da página */
    contain: layout style;
}

.card {
    position: relative;
    background-color: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1.5px solid var(--card-border);
    border-radius: var(--radius-xl);
    padding: var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    box-shadow: var(--shadow-sm);
    transition:
        transform var(--duration-base) var(--ease-spring),
        box-shadow var(--duration-base) ease,
        border-color var(--duration-base) ease;
    overflow: hidden;
    text-decoration: none;
    animation: cardEntrance 0.5s var(--ease-smooth) both;
    /* Pré-promove o card a camada de composição GPU antes do hover
       Evita o artefato de renderização causado pela promoção/remoção
       dinâmica de camada durante o scroll */
    will-change: transform;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(255, 102, 0, 0.06) 0%, transparent 60%);
    opacity: 0;
    transition: opacity var(--duration-base) ease;
    pointer-events: none;
}

.card:hover::before {
    opacity: 1;
}

.card>* {
    position: relative;
    z-index: 1;
}

.card:hover {
    transform: translateY(-6px) scale(1.005);
    box-shadow: var(--shadow-hover);
    border-color: var(--card-border-hover);
}

.card:active {
    transform: translateY(-3px) scale(1.002);
}

/* Durante o scroll, desativa hover nos cards para evitar estado preso */
.is-scrolling .card {
    pointer-events: none;
}

.card-icon-container {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--bg-subtle);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-xs);
    flex-shrink: 0;
}

.card-icon-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 6px;
}

.card-icon-fallback {
    width: 100%;
    height: 100%;
    background: var(--brand-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.35rem;
    letter-spacing: -0.04em;
}

.card-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    flex: 1;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1.3;
}

.card-url {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-2);
    padding-top: var(--space-3);
    border-top: 1px solid var(--card-border);
}

.card-btn {
    color: var(--accent-color);
    font-size: 0.825rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    transition: gap var(--duration-fast) var(--ease-spring), color var(--duration-fast);
    letter-spacing: 0.01em;
}

.card:hover .card-btn {
    gap: var(--space-2);
    color: var(--accent-hover);
}

.card-btn svg {
    transition: transform var(--duration-fast) var(--ease-spring);
}

.card:hover .card-btn svg {
    transform: translate(2px, -2px);
}

.card-newtab-badge {
    font-size: 0.7rem;
    color: var(--text-muted);
    background: var(--bg-subtle);
    border: 1px solid var(--card-border);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    letter-spacing: 0.03em;
    font-weight: 500;
    opacity: 0;
    transform: translateX(4px);
    transition: opacity var(--duration-base), transform var(--duration-base);
}

.card:hover .card-newtab-badge {
    opacity: 1;
    transform: translateX(0);
}

/* ================== EMPTY STATE ================== */
.no-results {
    display: none;
    text-align: center;
    padding: var(--space-12) var(--space-6);
    color: var(--text-secondary);
}

.no-results-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    opacity: 0.4;
}

.no-results-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.no-results-sub {
    font-size: 0.9rem;
}

/* ================== FOOTER ================== */
footer {
    text-align: center;
    padding: var(--space-6);
    border-top: 1px solid var(--card-border);
    color: var(--text-muted);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

footer strong {
    color: var(--accent-color);
    font-weight: 600;
}

/* ================== ANIMAÇÕES ================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ================== BARRA DE ROLAGEM CUSTOMIZADA ================== */

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: transparent transparent;
    transition: scrollbar-color 0.4s ease;
}

/* Aplica a cor quando o usuário está rolando */
body.is-scrolling {
    scrollbar-color: rgba(255, 102, 0, 0.35) transparent;
}

/* Chrome / Edge / Safari */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: transparent;
    border-radius: var(--radius-full);
    transition: background-color 0.4s ease;
}

/* Thumb aparece apenas durante o scroll */
body.is-scrolling::-webkit-scrollbar-thumb {
    background-color: rgba(255, 102, 0, 0.35);
}

body.is-scrolling::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 102, 0, 0.6);
}

/* ================== FAB — BOTÃO FLUTUANTE ================== */
.fab {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: 900;

    /* Dimensões */
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);

    /* Glassmorphism */
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1.5px solid var(--accent-color);

    /* Ícone */
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;

    /* Sombra com glow laranja */
    box-shadow: 0 4px 16px rgba(255, 102, 0, 0.20), var(--shadow-sm);

    /* Entrada: começa invisível e deslocado para baixo */
    opacity: 0;
    transform: translateY(12px) scale(0.9);
    pointer-events: none;

    transition:
        opacity       var(--duration-base) var(--ease-smooth),
        transform     var(--duration-base) var(--ease-spring),
        box-shadow    var(--duration-fast) ease,
        border-color  var(--duration-fast) ease,
        background    var(--duration-fast) ease;
}

/* Estado visível (adicionado via JS) */
.fab.fab--visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* Hover */
.fab:hover {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
    box-shadow: 0 8px 28px rgba(255, 102, 0, 0.35), var(--shadow-sm);
    transform: translateY(-3px) scale(1.08);
}

.fab:active {
    transform: translateY(0) scale(0.96);
}

/* Ícone interno */
.fab svg {
    width: 18px;
    height: 18px;
    transition: transform var(--duration-base) var(--ease-spring);
}

/* Rotaciona o ícone 180° quando está no modo "descer" */
.fab.fab--down svg {
    transform: rotate(180deg);
}

/* ── Responsividade do FAB ─────────────────────────────── */
@media (max-width: 480px) {
    .fab {
        bottom: var(--space-4);
        right: var(--space-4);
        width: 40px;
        height: 40px;
    }
}

/* ================== RESPONSIVIDADE ================== */

/* Mobile — < 480px */
@media (max-width: 480px) {
    header {
        padding: 0 var(--space-4);
        height: 54px;
    }

    main {
        padding: var(--space-8) var(--space-4) var(--space-8);
    }

    .hero {
        margin-bottom: var(--space-8);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .grid {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .search-shortcut {
        display: none;
    }
}

/* Tablet — 481–1024px */
@media (min-width: 481px) and (max-width: 1024px) {
    header {
        padding: 0 var(--space-5);
    }

    main {
        padding: var(--space-10) var(--space-5);
    }

    .grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: var(--space-4);
    }
}

/* Desktop largo — ≥ 1440px */
@media (min-width: 1440px) {
    main {
        max-width: 1440px;
        padding-left: var(--space-10);
        padding-right: var(--space-10);
    }

    .grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--space-6);
    }

    .hero h1 {
        font-size: 4rem;
    }
}

/* Ultrawide — ≥ 1920px */
@media (min-width: 1920px) {
    main {
        max-width: 1800px;
    }

    .grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

/* Preferência por movimento reduzido (a11y) */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}