/* style.css */
:root {
    --bg-color: #0b0710;
    --accent-color: #f72585; /* Vibrant pink/magenta */
    --accent-glow: rgba(247, 37, 133, 0.6);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #ffb5a7;
    --font-heading: 'Cinzel', serif;
    --font-body: 'Montserrat', sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    background: radial-gradient(circle at center, #1b0a1f 0%, #0b0710 100%);
}

#particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    background: var(--accent-color);
    border-radius: 50%;
    filter: blur(2px);
    opacity: 0;
    animation: floatUp 8s infinite linear;
}

@keyframes floatUp {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    20% { opacity: 0.6; }
    80% { opacity: 0.2; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

.envelope-container {
    z-index: 10;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    transition: opacity 1s ease, transform 1s ease;
}

.envelope-container.fade-out {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 400;
    text-shadow: 0 0 15px var(--accent-glow);
    animation: pulseText 3s infinite alternate;
}

@keyframes pulseText {
    0% { text-shadow: 0 0 10px var(--accent-glow); transform: scale(1); }
    100% { text-shadow: 0 0 25px var(--accent-glow), 0 0 40px var(--accent-color); transform: scale(1.02); }
}

button {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--accent-color);
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
    font-family: var(--font-body);
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 0 15px rgba(247, 37, 133, 0.2);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(5px);
}

button::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

button:hover:not(:disabled) {
    background: var(--accent-color);
    box-shadow: 0 0 30px var(--accent-glow);
    transform: translateY(-3px) scale(1.05);
}

button:hover:not(:disabled)::before {
    left: 100%;
}

button:disabled {
    cursor: not-allowed;
    border-color: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.5);
}

.blooming-box {
    position: absolute;
    top: 0; left: 0; width: 100%; min-height: 100%;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 4rem 2rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1.5s ease, visibility 1.5s;
}

.blooming-box.active {
    opacity: 1;
    visibility: visible;
}

.glow-text {
    font-family: var(--font-heading);
    font-size: 3rem;
    text-align: center;
    margin-bottom: 3rem;
    background: linear-gradient(to right, #ffb5a7, var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: revealTitle 2s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

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

.cards-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2.5rem;
    max-width: 1200px;
    perspective: 1000px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 24px;
    width: 280px;
    height: 380px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateY(50px) rotateX(-10deg);
    transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.card.bloom {
    opacity: 1;
    transform: translateY(0) rotateX(0deg);
}

.card:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 15px 40px rgba(247, 37, 133, 0.3);
    border-color: rgba(247, 37, 133, 0.4);
}

.card-img-container {
    width: 100%;
    height: 200px;
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    position: relative;
}

.card-img-container::after {
    content: '';
    position: absolute;
    top:0; left:0; width:100%; height:100%;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
    border-radius: 16px;
    pointer-events: none;
}

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.card:hover img {
    transform: scale(1.1);
}

.card-message {
    font-size: 1.1rem;
    line-height: 1.5;
    color: var(--text-secondary);
    font-style: italic;
    flex-grow: 1;
    display: flex;
    align-items: center;
}

.sender-text {
    margin-top: 4rem;
    font-size: 1.2rem;
    color: rgba(255,255,255,0.5);
    font-family: var(--font-heading);
    opacity: 0;
    animation: revealTitle 2s ease forwards 2s; /* Delayed appearance */
}

/* --- Password Screen Styles --- */
.password-container {
    z-index: 30;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 3rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.password-container.fade-out {
    opacity: 0;
    transform: scale(0.9);
    pointer-events: none;
}

.password-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--text-secondary);
    text-shadow: 0 0 10px rgba(255, 181, 167, 0.4);
}

.password-input-wrapper {
    display: flex;
    gap: 10px;
}

#passwordInput {
    padding: 0.8rem 1.2rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(0, 0, 0, 0.3);
    color: white;
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
    width: 250px;
}

#passwordInput:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 15px rgba(247, 37, 133, 0.3);
}

#submitPasswordBtn {
    padding: 0.8rem 1.5rem;
}

.password-error {
    color: #ff4d4d;
    font-size: 0.9rem;
    height: 1.2rem;
    transition: opacity 0.3s;
}

.hidden {
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
    display: none !important;
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    .glow-text { font-size: 2.2rem; }
    .card { width: 100%; max-width: 320px; }
    .password-input-wrapper { flex-direction: column; align-items: center; }
}