:root {
    --brand-dark: #35286b;
    --brand-gold: #ffcb47;
    --brand-light: #f4f3fa;
}

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

body {
    background-color: var(--brand-dark);
    font-family: "Montserrat", sans-serif;
    color: var(--brand-light);
    overflow: hidden;
    min-height: 100dvh;
    height: 100dvh;
    width: 100vw;
}

#parallax-wrapper {
    z-index: 1;
}

#fireworks-canvas {
    z-index: 5;
}

.content-overlay {
    z-index: 10;
}

#parallax-wrapper {
    position: absolute;
    width: 110vw;
    height: 110vh;
    top: -5vh;
    left: -5vw;
}

.layer {
    position: absolute;
    width: 100%;
    height: 100%;
    will-change: transform;
}

.crescent-moon {
    position: absolute;
    top: 10%;
    right: 15%;
    width: 120px;
    height: 120px;
    background: transparent;
    border-radius: 50%;
    box-shadow: 25px 15px 0 0 var(--brand-gold);
    filter: drop-shadow(0 0 20px rgba(255, 203, 71, 0.8));
    animation: moonPulse 6s ease-in-out infinite alternate;
}

@keyframes moonPulse {
    0% {
        transform: scale(1) rotate(-10deg);
        filter: drop-shadow(0 0 15px rgba(255, 203, 71, 0.6));
    }
    100% {
        transform: scale(1.05) rotate(5deg);
        filter: drop-shadow(0 0 30px rgba(255, 203, 71, 1));
    }
}

#fireworks-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.content-overlay {
    position: relative;
    min-height: 100dvh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    background: radial-gradient(circle at center, transparent 0%, rgba(53, 40, 107, 0.6) 100%);
}

.main-greeting {
    font-family: "Playfair Display", serif;
    font-size: clamp(2.6rem, 9vw, 5.5rem);
    color: var(--brand-gold);
    text-shadow: 0 0 25px rgba(255, 203, 71, 0.6);
    margin-bottom: 0.5rem;
    opacity: 0;
}

.company-name {
    font-size: clamp(0.95rem, 2.7vw, 1.4rem);
    letter-spacing: clamp(3px, 1.2vw, 10px);
    text-transform: uppercase;
    font-weight: 300;
    color: var(--brand-light);
    margin-bottom: 3rem;
    opacity: 0;
}

.wishing-message {
    font-size: clamp(0.98rem, 2.3vw, 1.25rem);
    font-weight: 300;
    max-width: 650px;
    line-height: 1.75;
    margin-bottom: clamp(1.4rem, 7vh, 5rem);
    min-height: 0;
    color: var(--brand-light);
}

.cosmic-eidi-button {
    position: relative;
    background: transparent;
    border: 1px solid rgba(255, 203, 71, 0.4);
    color: var(--brand-gold);
    font-family: "Montserrat", sans-serif;
    font-size: clamp(0.9rem, 2.2vw, 1.1rem);
    font-weight: 600;
    padding: clamp(0.92rem, 2.2vw, 1.4rem) clamp(1.25rem, 4.2vw, 4rem);
    border-radius: 4px;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.5s ease;
    text-transform: uppercase;
    letter-spacing: clamp(1px, 0.8vw, 3px);
    box-shadow: 0 0 20px rgba(255, 203, 71, 0.1);
}

.btn-content {
    position: relative;
    z-index: 2;
    display: block;
    white-space: normal;
    line-height: 1.3;
    text-wrap: balance;
}

.btn-glow-track {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 203, 71, 0.4), transparent);
    transition: left 0.6s ease;
    z-index: 1;
}

.cosmic-eidi-button:hover {
    border: 1px solid var(--brand-gold);
    box-shadow: 0 0 30px rgba(255, 203, 71, 0.4);
    transform: translateY(-2px);
}

.cosmic-eidi-button:hover .btn-glow-track {
    left: 100%;
}

@media (max-width: 900px) {
    .crescent-moon {
        top: 7%;
        right: 9%;
        width: 90px;
        height: 90px;
        box-shadow: 19px 11px 0 0 var(--brand-gold);
    }
    .content-overlay {
        padding: 1.4rem;
    }
    .wishing-message {
        max-width: 92vw;
    }
}

@media (max-width: 640px) {
    body {
        overflow-y: auto;
        overflow-x: hidden;
    }
    #parallax-wrapper {
        width: 100vw;
        height: 100dvh;
        top: 0;
        left: 0;
    }
    .content-overlay {
        justify-content: flex-start;
        padding: max(1rem, env(safe-area-inset-top)) 1rem max(1.3rem, env(safe-area-inset-bottom));
    }
    .main-greeting {
        margin-top: 8vh;
    }
    .company-name {
        margin-bottom: 1.5rem;
    }
    .wishing-message {
        line-height: 1.58;
        margin-bottom: 1.5rem;
    }
    .cosmic-eidi-button {
        width: min(92vw, 420px);
        border-radius: 8px;
    }
}

@media (max-width: 380px) {
    .main-greeting {
        font-size: clamp(2.25rem, 10.2vw, 2.8rem);
    }
    .wishing-message {
        font-size: 0.92rem;
    }
    .cosmic-eidi-button {
        font-size: 0.82rem;
    }
}