/* ============================================
   SPLASH SCREEN - Book + Blackout Transition
   ============================================ */

.splash-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(160deg, #040D1A 0%, #0A1628 40%, #0A2A5E 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    gap: 2.5rem;
}

/* ===== WRAPPER COM PERSPECTIVE ===== */
.book-wrapper {
    perspective: 1800px;
    -webkit-perspective: 1800px;
}

/* ===== LIVRO ===== */
.book {
    position: relative;
    width: 340px;
    height: 460px;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
}

/* Página interna */
.book-page {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #FFFEF9 0%, #F8F4EE 100%);
    border-radius: 4px 12px 12px 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 3px 0 10px rgba(0, 0, 0, 0.08);
}

.book-page-content {
    text-align: center;
    opacity: 0;
}

.splash-screen.opened .book-page-content {
    animation: pageContentIn 1s ease 0.5s forwards;
}

.book-page-text {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.4rem;
    font-style: italic;
    color: #0A1628;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.book-page-heart {
    color: #0A4DFF;
}

.splash-screen.opened .book-page-heart {
    animation: heartPulse 1.2s ease-in-out infinite;
    animation-delay: 1.5s;
}

/* ===== CAPA DO LIVRO ===== */
.book-cover {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(160deg, #0A4DFF 0%, #072E99 40%, #041B5C 100%);
    border-radius: 4px 12px 12px 4px;
    transform-origin: left center;
    transform: rotateY(0deg);
    -webkit-transform: rotateY(0deg);
    z-index: 2;
    box-shadow:
        4px 4px 25px rgba(0, 0, 0, 0.5),
        inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

/* Quando abre: animação da capa */
.splash-screen.opened .book-cover {
    animation: coverOpen 3s cubic-bezier(0.3, 0.0, 0.2, 1) forwards;
}

/* Lombada */
.book-cover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 14px;
    height: 100%;
    background: linear-gradient(90deg, #021030 0%, #05206A 100%);
    border-radius: 4px 0 0 4px;
}

/* Borda decorativa */
.book-cover::after {
    content: '';
    position: absolute;
    top: 14px;
    right: 14px;
    bottom: 14px;
    left: 26px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 3px;
}

/* Conteúdo da capa */
.book-cover-inner {
    position: absolute;
    top: 0;
    left: 14px;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

/* Ornamentos */
.book-ornament-top,
.book-ornament-bottom {
    width: 80px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    position: relative;
    margin: 1.2rem 0;
}

.book-ornament-top::before,
.book-ornament-bottom::before {
    content: '✦';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(255, 255, 255, 0.35);
    font-size: 10px;
}

.book-logo {
    height: 65px;
    width: auto;
    margin-bottom: 1.2rem;
    filter: brightness(0) invert(1);
}

.book-names {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    font-weight: 600;
    color: #FFFFFF;
    letter-spacing: 0.04em;
    text-align: center;
    margin-bottom: 0.6rem;
}

.book-divider {
    width: 45px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.45), transparent);
    margin-bottom: 0.6rem;
}

.book-date {
    font-family: 'Montserrat', sans-serif;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.65);
    letter-spacing: 0.4em;
    margin-bottom: 1.2rem;
}

.book-phrase {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.05rem;
    font-style: italic;
    color: rgba(255, 255, 255, 0.5);
    text-align: center;
    line-height: 1.6;
}

/* ===== BOTÃO ===== */
.splash-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    color: #FFFFFF;
    font-family: 'Montserrat', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.3s, border-color 0.3s, transform 0.3s, box-shadow 0.3s;
    animation: btnGlow 2.5s ease-in-out infinite;
}

.splash-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(10, 77, 255, 0.25);
}

/* Botão some ao clicar */
.splash-screen.opened .splash-btn {
    animation: btnFadeOut 0.5s ease forwards;
    pointer-events: none;
}

/* ===== BLACKOUT ===== */
.splash-blackout {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    opacity: 0;
    z-index: 10000;
    pointer-events: none;
}

.splash-blackout.darken {
    animation: darken 1.5s ease forwards;
}

.splash-blackout.lighten {
    animation: lighten 2.5s ease forwards;
}

/* ===== KEYFRAMES ===== */

@keyframes coverOpen {
    0% {
        transform: rotateY(0deg);
        box-shadow: 4px 4px 25px rgba(0, 0, 0, 0.5);
    }
    30% {
        transform: rotateY(-25deg);
    }
    60% {
        transform: rotateY(-90deg);
    }
    100% {
        transform: rotateY(-165deg);
        box-shadow: -2px 4px 12px rgba(0, 0, 0, 0.2);
    }
}

@keyframes pageContentIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes btnFadeOut {
    to {
        opacity: 0;
        transform: translateY(15px);
    }
}

@keyframes darken {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes lighten {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes btnGlow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(10, 77, 255, 0.25); }
    50% { box-shadow: 0 0 15px 3px rgba(10, 77, 255, 0.1); }
}

@keyframes heartPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .splash-screen {
        gap: 2rem;
        padding: 1.5rem;
    }

    .book {
        width: 300px;
        height: 400px;
    }

    .book-logo { height: 55px; }
    .book-names { font-size: 1.7rem; }
    .book-date { font-size: 0.75rem; letter-spacing: 0.3em; }
    .book-phrase { font-size: 1rem; }
    .book-cover-inner { padding: 1.5rem; }

    .splash-btn {
        padding: 0.9rem 2rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .splash-screen {
        gap: 1.5rem;
        padding: 1rem;
    }

    .book-wrapper {
        perspective: 1200px;
        -webkit-perspective: 1200px;
    }

    .book {
        width: 250px;
        height: 340px;
    }

    .book-logo { height: 45px; margin-bottom: 0.8rem; }
    .book-names { font-size: 1.4rem; margin-bottom: 0.4rem; }
    .book-divider { width: 35px; margin-bottom: 0.4rem; }
    .book-date { font-size: 0.7rem; letter-spacing: 0.25em; margin-bottom: 0.8rem; }
    .book-phrase { font-size: 0.9rem; line-height: 1.5; }
    .book-ornament-top, .book-ornament-bottom { margin: 0.8rem 0; width: 60px; }
    .book-cover-inner { padding: 1.2rem; }

    .book-page-text { font-size: 1.1rem; }

    .splash-btn {
        padding: 0.8rem 1.6rem;
        font-size: 0.78rem;
        gap: 0.5rem;
    }
}

@media (max-width: 360px) {
    .book {
        width: 220px;
        height: 300px;
    }

    .book-logo { height: 38px; }
    .book-names { font-size: 1.2rem; }
    .book-phrase { font-size: 0.82rem; }
    .book-ornament-top, .book-ornament-bottom { margin: 0.6rem 0; width: 50px; }

    .splash-btn {
        padding: 0.75rem 1.4rem;
        font-size: 0.72rem;
    }
}

/* Landscape em telas pequenas */
@media (max-height: 500px) and (orientation: landscape) {
    .splash-screen {
        gap: 1rem;
        flex-direction: row;
        padding: 1rem 2rem;
    }

    .book {
        width: 200px;
        height: 270px;
    }

    .book-logo { height: 35px; margin-bottom: 0.5rem; }
    .book-names { font-size: 1.1rem; }
    .book-date { margin-bottom: 0.5rem; }
    .book-phrase { font-size: 0.8rem; }
    .book-ornament-top, .book-ornament-bottom { margin: 0.5rem 0; }
    .book-cover-inner { padding: 0.8rem; }

    .splash-btn {
        padding: 0.7rem 1.5rem;
        font-size: 0.75rem;
    }
}

/* ============================================
   ABERTURA DO ENVELOPE
   ============================================ */

.splash-screen {
    inset: 0;
    width: 100%;
    height: 100%;
    min-height: 100dvh;
    padding: 0;
    gap: 0;
    overflow: hidden;
    background: #020b1c;
    isolation: isolate;
}

.envelope-trigger,
.envelope-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.envelope-trigger {
    z-index: 2;
    display: block;
    padding: 0;
    border: 0;
    background: #020b1c;
    cursor: pointer;
    overflow: hidden;
    transition: opacity 180ms ease;
    -webkit-tap-highlight-color: transparent;
}

.envelope-trigger:focus-visible {
    outline: 3px solid #d5ad5c;
    outline-offset: -6px;
}

.envelope-image,
.envelope-video {
    object-fit: cover;
    object-position: center;
}

.envelope-image {
    display: block;
    width: 100%;
    height: 100%;
    transform: scale(1.002);
}

.envelope-video {
    z-index: 1;
    display: block;
    opacity: 0;
    background: #020b1c;
    pointer-events: none;
}

.envelope-hint {
    position: absolute;
    top: 68%;
    left: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    padding: 0;
    color: #f7e5b6;
    filter: drop-shadow(0 2px 7px rgba(0, 0, 0, 0.75));
    white-space: nowrap;
    transform: translateX(-50%);
}

.envelope-hint-arrow {
    color: #d5ad5c;
    font-family: Georgia, serif;
    font-size: clamp(1.5rem, 5vw, 2.2rem);
    line-height: 1;
    animation: hintArrow 1.2s ease-in-out infinite;
}

.envelope-hint-text {
    font-family: 'Cormorant Garamond', 'Playfair Display', cursive;
    font-size: clamp(1.75rem, 6vw, 2.6rem);
    font-style: italic;
    font-weight: 500;
    letter-spacing: 0.025em;
    line-height: 1;
    transform-origin: center;
    animation: hintBreath 1.8s ease-in-out infinite;
}

.splash-screen.is-playing .envelope-trigger {
    opacity: 0;
    pointer-events: none;
}

.splash-screen.is-playing .envelope-video {
    opacity: 1;
}

.splash-screen.is-finishing {
    opacity: 0;
    transition: opacity 420ms ease;
    pointer-events: none;
}

@keyframes hintArrow {
    0%, 100% { transform: translateY(3px); }
    50% { transform: translateY(-5px); }
}

@keyframes hintBreath {
    0%, 100% {
        opacity: 0.78;
        transform: translateY(5px) scale(0.98);
    }
    50% {
        opacity: 1;
        transform: translateY(-5px) scale(1.035);
    }
}

@media (min-width: 900px) {
    .envelope-image,
    .envelope-video {
        object-fit: contain;
    }
}

@media (prefers-reduced-motion: reduce) {
    .envelope-hint-arrow,
    .envelope-hint-text {
        animation: none;
    }

    .splash-screen.is-finishing,
    .envelope-trigger {
        transition-duration: 1ms;
    }
}