:root {
    --gold-color: #E0C56E;
    --dark-bg: #0A0710;
    --card-bg: #161220;
    --text-light: #F0E6D2;
    --text-dark: #a9a9a9;
    --glow-color: rgba(224, 197, 110, 0.6);
    --font-header: 'Cinzel', serif;
    --font-body: 'Cormorant Garamond', serif;
    --font-signature: 'Great Vibes', cursive;
    --font-script: 'Dancing Script', cursive;
    /* New, elegant body font */
}

body,
html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--dark-bg);
    overflow: hidden;
}

#background-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* --- Cover Layer --- */
.cover-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    background: var(--dark-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 1s ease-out;
}

.cover-wrapper.unlocked {
    opacity: 0;
    pointer-events: none;
}

.cover-content {
    text-align: center;
    padding: 20px;
    font-family: var(--font-header);
}

.cover-content h1 {
    font-size: 3rem;
    color: var(--gold-color);
    margin: 0;
    text-shadow: 0 0 10px var(--glow-color);
}

.cover-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin: 10px 0 60px 0;
    font-family: var(--font-body);
}

.for-name {
    font-family: var(--font-signature);
    font-size: 2.8rem;
    color: var(--gold-color);
    margin: 20px 0 10px 0;
    text-shadow:
        0 0 15px var(--glow-color),
        0 0 30px var(--glow-color),
        0 2px 4px rgba(0, 0, 0, 0.8);
    font-weight: 400;
    letter-spacing: 2px;
    position: relative;
    animation: signature-glow 4s ease-in-out infinite alternate;
}

.for-name::before {
    content: '✦';
    position: absolute;
    left: -40px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--gold-color);
    opacity: 0.7;
    animation: twinkle 3s ease-in-out infinite;
}

.for-name::after {
    content: '✦';
    position: absolute;
    right: -40px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: var(--gold-color);
    opacity: 0.7;
    animation: twinkle 3s ease-in-out infinite 1.5s;
}

@keyframes signature-glow {
    0% {
        text-shadow:
            0 0 15px var(--glow-color),
            0 0 30px var(--glow-color),
            0 2px 4px rgba(0, 0, 0, 0.8);
    }

    100% {
        text-shadow:
            0 0 25px var(--glow-color),
            0 0 50px var(--glow-color),
            0 0 75px rgba(224, 197, 110, 0.3),
            0 2px 4px rgba(0, 0, 0, 0.8);
    }
}

@keyframes twinkle {

    0%,
    100% {
        opacity: 0.7;
        transform: translateY(-50%) scale(1);
    }

    50% {
        opacity: 1;
        transform: translateY(-50%) scale(1.2);
    }
}

.seal-container {
    position: relative;
}

.seal-button {
    width: 80px;
    height: 80px;
    cursor: pointer;
    margin: 0 auto;
    transition: transform 0.3s ease;
}

.seal-button:hover {
    transform: scale(1.1);
}

.seal-button svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: var(--gold-color);
    stroke-width: 4;
    filter: drop-shadow(0 0 8px var(--glow-color));
    animation: pulse-seal 4s infinite ease-in-out;
}

@keyframes pulse-seal {
    50% {
        filter: drop-shadow(0 0 16px var(--glow-color));
    }
}

.progress-bar-container {
    width: 150px;
    height: 8px;
    border: 1px solid var(--gold-color);
    border-radius: 4px;
    margin: 30px auto 0;
    opacity: 0;
    transition: opacity 0.5s;
}

.progress-bar-container.visible {
    opacity: 1;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: var(--gold-color);
    border-radius: 3px;
}

/* --- Scene & Card --- */
.scene {
    perspective: 2000px;
    z-index: 1;
    opacity: 0;
    /* Start hidden */
    transition: opacity 1s ease-in;
}

.scene.visible {
    opacity: 1;
}

.card {
    width: 380px;
    height: 600px;
    position: relative;
    transform-style: preserve-3d;
}

.is-revealed {
    transform: rotateY(180deg);
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
    overflow: hidden;
    background: var(--card-bg);
}

.card-front {
    border: 2px solid;
    border-image: linear-gradient(135deg, #333, var(--gold-color), #333) 1;
}

#front-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Card Back & Book */
.card-back {
    padding: 10px;
    box-sizing: border-box;
    transform: rotateY(180deg);
}

#blessing-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.book-container {
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.pages-wrapper {
    display: flex;
    height: 100%;
    width: 400%;
    /* 4 pages */
    transition: transform 0.8s cubic-bezier(0.86, 0, 0.07, 1);
}

.page {
    width: 25%;
    height: 100%;
    padding: 20px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.page.active {
    opacity: 1;
}

.page-title {
    font-family: var(--font-header);
    font-size: 1.6rem;
    color: var(--gold-color);
    margin-bottom: 40px;
    border-bottom: 1px solid var(--gold-color);
    padding-bottom: 10px;
    width: 90%;
}

.wish-item {
    opacity: 0;
    transform: translateY(30px);
    margin-bottom: 30px;
    animation: content-fade-in 0.8s forwards;
    animation-play-state: paused;
}

.page.animate .wish-item {
    animation-delay: var(--delay, 0.5s);
    animation-play-state: running;
}

@keyframes content-fade-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.icon-container {
    margin-bottom: 10px;
}

.icon-container svg {
    width: 45px;
    height: 45px;
    stroke: var(--gold-color);
    stroke-width: 1.2;
    fill: var(--gold-color);
    fill-opacity: 0.1;
    filter: drop-shadow(0 0 5px var(--glow-color));
}

.wish-item h3 {
    font-family: var(--font-header);
    font-size: 1.3rem;
    color: var(--gold-color);
    margin: 0 0 8px;
    text-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}

.wish-item p {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 1.2rem;
    /* Increased size for the new elegant font */
    color: var(--text-light);
    line-height: 1.7;
    margin: 0;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

.nav-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 3rem;
    color: var(--text-dark);
    cursor: pointer;
    z-index: 10;
    transition: color 0.3s, transform 0.3s;
    user-select: none;
    padding: 10px;
    text-shadow: 0 0 10px var(--dark-bg);
}

.nav-arrow:hover {
    color: var(--gold-color);
    transform: translateY(-50%) scale(1.2);
}

.nav-arrow.left {
    left: 5px;
}

.nav-arrow.right {
    right: 5px;
}

.nav-arrow.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Final Page Enhancements */
.final-message {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--text-light);
}

.final-message h2 {
    font-family: var(--font-header);
    color: var(--gold-color);
    font-size: 1.6rem;
    margin-bottom: 30px;
}

.final-message p {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 1.2rem;
    line-height: 1.7;
    padding: 0 10px;
    margin-top: 30px;
}

.signature-name {
    font-family: var(--font-signature);
    font-size: 3.2rem;
    color: var(--gold-color);
    margin-top: 40px;
    text-shadow:
        0 0 20px var(--glow-color),
        0 0 40px var(--glow-color),
        0 0 60px rgba(224, 197, 110, 0.4),
        0 3px 6px rgba(0, 0, 0, 0.9);
    font-weight: 400;
    letter-spacing: 3px;
    position: relative;
    transform: rotate(-2deg);
    animation: signature-shimmer 6s ease-in-out infinite;
}

.signature-name::before {
    content: '';
    position: absolute;
    left: -20px;
    right: -20px;
    bottom: -8px;
    height: 1px;
    background: linear-gradient(to right,
            transparent,
            var(--gold-color),
            transparent);
    opacity: 0.6;
    animation: underline-pulse 3s ease-in-out infinite;
}

.signature-name::after {
    content: '✨';
    position: absolute;
    right: -30px;
    top: -10px;
    font-size: 1.2rem;
    color: var(--gold-color);
    opacity: 0.8;
    animation: sparkle-float 4s ease-in-out infinite;
}

@keyframes signature-shimmer {

    0%,
    100% {
        text-shadow:
            0 0 20px var(--glow-color),
            0 0 40px var(--glow-color),
            0 0 60px rgba(224, 197, 110, 0.4),
            0 3px 6px rgba(0, 0, 0, 0.9);
        transform: rotate(-2deg);
    }

    33% {
        text-shadow:
            0 0 30px var(--glow-color),
            0 0 60px var(--glow-color),
            0 0 90px rgba(224, 197, 110, 0.6),
            0 3px 6px rgba(0, 0, 0, 0.9);
        transform: rotate(-1deg);
    }

    66% {
        text-shadow:
            0 0 25px var(--glow-color),
            0 0 50px var(--glow-color),
            0 0 75px rgba(224, 197, 110, 0.5),
            0 3px 6px rgba(0, 0, 0, 0.9);
        transform: rotate(-2.5deg);
    }
}

@keyframes underline-pulse {

    0%,
    100% {
        opacity: 0.6;
        transform: scaleX(1);
    }

    50% {
        opacity: 1;
        transform: scaleX(1.1);
    }
}

@keyframes sparkle-float {

    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.8;
    }

    25% {
        transform: translateY(-5px) rotate(90deg);
        opacity: 1;
    }

    50% {
        transform: translateY(-3px) rotate(180deg);
        opacity: 0.9;
    }

    75% {
        transform: translateY(-7px) rotate(270deg);
        opacity: 1;
    }
}

.final-seal {
    width: 150px;
    height: 150px;
    opacity: 0;
    transform: scale(0.5);
    animation: seal-reveal 1s ease-out 0.5s forwards;
}

.final-seal svg {
    width: 100%;
    height: 100%;
    stroke: var(--gold-color);
    filter: drop-shadow(0 0 10px var(--glow-color));
}

@keyframes seal-reveal {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* --- Mobile Responsiveness --- */
@media (max-width: 768px) {
    .cover-content h1 {
        font-size: 2.2rem;
    }

    .cover-content p {
        font-size: 1.1rem;
    }

    .for-name {
        font-size: 2.2rem;
        letter-spacing: 1px;
        margin: 15px 0 8px 0;
    }

    .for-name::before,
    .for-name::after {
        font-size: 1.2rem;
        left: -25px;
        right: -25px;
    }

    .signature-name {
        font-size: 2.6rem;
        letter-spacing: 2px;
        margin-top: 25px;
    }

    .signature-name::after {
        right: -20px;
        font-size: 1rem;
    }

    .card {
        width: 90vw;
        height: 150vw;
        /* Using viewport units for responsive scaling */
        max-height: 85vh;
        /* Prevents card from being too tall on long screens */
    }

    .card-back {
        padding: 5px;
    }

    .page {
        padding: 15px 5px;
    }

    .page-title {
        font-size: 1.3rem;
        margin-bottom: 25px;
    }

    .wish-item {
        margin-bottom: 25px;
    }

    .icon-container svg {
        width: 35px;
        height: 35px;
    }

    .wish-item h3 {
        font-size: 1.2rem;
    }

    .wish-item p {
        font-size: 1.1rem;
        line-height: 1.6;
    }

    .final-message h2 {
        font-size: 1.4rem;
        margin-bottom: 20px;
    }

    .final-message p {
        font-size: 1.1rem;
        margin-top: 20px;
    }

    .final-seal {
        width: 120px;
        height: 120px;
    }

    .nav-arrow {
        font-size: 2.8rem;
    }

    .nav-arrow.left {
        left: 0;
    }

    .nav-arrow.right {
        right: 0;
    }
}