/*
 * Shadown Sync — Site de apoio ao app de Backup automático
 * Paleta: ajuste as variáveis abaixo conforme as cores da imagem do app (350x350).
 * Ex.: use um seletor de cores na imagem e defina --cor-primaria, --cor-destaque, etc.
 */
:root {
    --cor-primaria: #0d1117;
    --cor-secundaria: #161b22;
    --cor-destaque: #238636;
    --cor-destaque-hover: #2ea043;
    --cor-texto: #e6edf3;
    --cor-texto-suave: #8b949e;
    --cor-link: #58a6ff;
    --cor-borda: rgba(255, 255, 255, 0.08);
    --raio: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--cor-primaria);
    color: var(--cor-texto);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: var(--cor-secundaria);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 0 var(--cor-borda);
}

header h1 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--cor-texto);
}

nav {
    display: flex;
    gap: 1.5rem;
}

nav a {
    color: var(--cor-texto-suave);
    text-decoration: none;
    transition: color 0.2s;
}

nav a:hover {
    color: var(--cor-link);
}

main {
    flex: 1;
    padding: 2rem;
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
}

/* Hero + ícone do app (350x350) — centro do topo da página */
.hero {
    text-align: center;
    padding: 2rem 0 4rem;
}

.app-icon {
    display: block;
    width: 200px;
    height: 200px;
    max-width: 350px;
    max-height: 350px;
    object-fit: contain;
    margin: 0 auto 1.5rem;
    border-radius: var(--raio);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0);
}

@media (min-width: 600px) {
    .app-icon {
        width: 280px;
        height: 280px;
    }
}

@media (min-width: 900px) {
    .app-icon {
        width: 350px;
        height: 350px;
    }
}

.hero h2 {
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--cor-texto);
}

.hero p {
    color: var(--cor-texto-suave);
    max-width: 520px;
    margin: 0 auto;
}

/* Seções comuns */
section {
    padding: 2.5rem 0;
    border-bottom: 1px solid var(--cor-borda);
}

section:last-of-type {
    border-bottom: none;
}

section h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--cor-texto);
}

.section-intro {
    color: var(--cor-texto-suave);
    margin-bottom: 1.5rem;
}

/* Carrossel de screenshots (prints) — 3 por vez */
.carousel {
    position: relative;
    max-width: 360px;
    margin: 1rem auto 0;
    padding: 0 2.5rem;
}

@media (min-width: 700px) {
    .carousel {
        max-width: 720px;
      }
}

@media (min-width: 1000px) {
    .carousel {
        max-width: 960px;
    }
}

.carousel-viewport {
    overflow: hidden;
    border-radius: var(--raio);
    border: 1px solid var(--cor-borda);
    background: var(--cor-secundaria);
}

.carousel-track {
    display: flex;
    transition: transform 0.35s ease-out;
}

/* 1 slide no mobile, 3 a partir de 700px */
.carousel-slide {
    flex: 0 0 100%;
    min-width: 0;
}

@media (min-width: 700px) {
    .carousel-slide {
        flex: 0 0 33.333%;
    }
}

.carousel-slide img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 9 / 16;
    object-fit: contain;
    background: #000;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    border-radius: 50%;
    background: var(--cor-secundaria);
    color: var(--cor-texto);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: background 0.2s, color 0.2s;
}

.carousel-btn:hover {
    background: var(--cor-destaque);
    color: #fff;
}

.carousel-prev {
    left: 0;
}

.carousel-next {
    right: 0;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.carousel-dots button {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: var(--cor-texto-suave);
    cursor: pointer;
    padding: 0;
    transition: background 0.2s, transform 0.2s;
}

.carousel-dots button:hover {
    background: var(--cor-link);
}

.carousel-dots button.active {
    background: var(--cor-destaque);
    transform: scale(1.2);
}

.carousel-counter {
    text-align: center;
    margin-top: 0.75rem;
    font-size: 0.9rem;
    color: var(--cor-texto-suave);
}

/* Download */
.download-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}

.btn-download {
    display: inline-block;
    padding: 0.85rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: background 0.2s, transform 0.02s;
}

.btn-download:first-child {
    background: var(--cor-destaque);
    color: #fff;
}

.btn-download:first-child:hover {
    background: var(--cor-destaque-hover);
}

.btn-download.btn-secondary {
    background: var(--cor-secundaria);
    color: var(--cor-texto);
    border: 1px solid var(--cor-borda);
}

.btn-download.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
}

.download-note {
    font-size: 0.85rem;
    color: var(--cor-texto-suave);
}

.download-note code {
    background: var(--cor-secundaria);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* Vídeos YouTube */
.videos-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 1rem;
}

@media (min-width: 700px) {
    .videos-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1000px) {
    .videos-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.video-item {
    background: var(--cor-secundaria);
    border-radius: var(--raio);
    overflow: hidden;
    border: 1px solid var(--cor-borda);
}

.video-item iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    display: block;
    border: none;
}

.video-title {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    color: var(--cor-texto-suave);
}

/* Footer */
footer {
    background: var(--cor-secundaria);
    padding: 1rem 2rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--cor-texto-suave);
    border-top: 1px solid var(--cor-borda);
}