html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow-x: hidden;
    background: linear-gradient(180deg, #8fc9f2 0%, #eef8ff 100%);
    font-family: "Trebuchet MS", Verdana, sans-serif;
}

#welcome-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    background-color: #B3C0CA;
    opacity: 1;
    transition: opacity 0.5s ease;
    overflow: hidden;
}

#welcome-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

#main-content {
    opacity: 0;
    visibility: hidden;
    position: relative;
    top: 0;
    left: 0;
    width: 100%;
    height: auto;
    background-color: #B3C0CA;
    transition: opacity 0.5s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    color: #fff;
    overflow-y: auto;
}

#main-content.visible {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease;
}

#welcome-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: background-color 0.5s ease;
}

#welcome-text {
    color: white;
    font-size: 24px;
    margin-bottom: 20px;
    text-align: center;
    font-family: 'Pacifico', cursive;
}

#enter-button {
    cursor: pointer;
    width: 200px;
    height: auto;
    transition: transform 0.3s ease;
}

#enter-button:hover {
    transform: scale(1.1);
}

#snow-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.snowflake {
    position: absolute;
    top: -10px;
    background-color: white;
    border-radius: 50%;
    opacity: 0.8;
    pointer-events: none;
    animation: fall linear infinite;
    z-index: -1
}

.paused .snowflake {
    animation-play-state: paused;
}

@keyframes fall {
    to {
        transform: translateY(100vh);
    }
}

p {
    font-size: 18px
}

.paused {
    animation-play-state: paused;
}

.hidden {
    display: none
}

.snowflake:nth-child(odd) {
    animation-duration: 4s;
    width: 10px;
    height: 10px;
}

.snowflake:nth-child(even) {
    animation-duration: 6s;
    width: 8px;
    height: 8px;
}

.content-section {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.5s, opacity 3s;
    opacity: 0;
    transform: translateY(20px);
}

.content-section.visible {
    transform: translateY(0);
    opacity: 1;
}

h1, h2 {
    text-align: center;
    color: #333;
}

p {
    text-align: center;
    color: #555;
}

.content-section-top {
    max-width: 900px;
    margin: 20px auto;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transform: translateY(20px);
}

.content-section:nth-child(even) {
    margin-left: auto;
    margin-right: 50px;
}

.content-section:nth-child(odd) {
    margin-right: auto;
    margin-left: 50px;
}

@media (max-width: 768px) {
    .content-section {
        margin: 20px auto;
    }
}

#game-container {
    display: none;
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: #8fc9f2;
}

#game-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

.tutorial {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.tutorial-content {
    background: #333;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    max-width: 500px;
}

.tutorial-content button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 1rem;
    color: white;
    background: #007bff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.tutorial.hidden {
    display: none;
}

#block-info.hidden {
    display: none;
}

#block-info {
    background: rgba(248, 252, 255, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 22px;
    padding: 18px;
    width: 280px;
    text-align: center;
    font-family: "Trebuchet MS", Verdana, sans-serif;
    color: #102033;
    font-size: 14px;
    z-index: 10;
    animation: fade-in 0.5s ease-out;
    position: absolute;
    box-shadow: 0 24px 60px rgba(9, 24, 43, 0.24);
    backdrop-filter: blur(12px);
}

#block-info h1 {
    margin: 0 0 8px;
    color: #102033;
}

#block-info p {
    margin: 0;
    color: #496071;
    line-height: 1.45;
}

@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#projects {
    flex-direction: row;
    justify-content: space-between;
    align-items: stretch;
    flex-wrap: wrap;
    padding: 10px;
    background-color: #5a322a;
    height: 100%;
    display: none
}

.project {
    flex: 1;
    margin: 10px;
    padding: 10px;
    background-color: white;
    border-radius: 5px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: left;
    overflow: hidden;
    word-wrap: break-word;
}

.project h3 {
    font-size: 1.5em;
    margin-bottom: 0.5em;
}

.project-description {
    font-size: 1em;
    line-height: 1.4;
}

button {
    margin-top: 10px;
    padding: 10px 16px;
    color: white;
    background: #102033;
    border: none;
    cursor: pointer;
    border-radius: 14px;
    box-shadow: 0 10px 24px rgba(9, 24, 43, 0.16);
    font-family: inherit;
    transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease;
}

button:hover {
    transform: translateY(-1px);
    box-shadow: 0 14px 30px rgba(9, 24, 43, 0.22);
}

#turn-device-sideways {
    display: none;
}

#mobile-controls {
    position: fixed;
    bottom: 14px;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 10px;
    z-index: 20;
    pointer-events: none;
}

#interact-character-button {
    position: absolute;
    bottom: 66px;
    left: 50%;
    transform: translateX(-50%);
    background: #2f7dd3;
}

#interact-button,
#move-left-button,
#jump-button,
#move-right-button {
    display: inline-block;
    padding: 12px 18px;
    font-size: 16px;
    background: rgba(16, 32, 51, 0.88);
    border: 1px solid rgba(255, 255, 255, 0.24);
    backdrop-filter: blur(10px);
    pointer-events: auto;
}

#mobile-controls button:active {
    background-color: #2f7dd3;
    transform: translateY(1px) scale(0.98);
}

#npc-dialog {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    max-width: 600px;
    background: rgba(248, 252, 255, 0.94);
    padding: 24px;
    border-radius: 26px;
    border: 1px solid rgba(255, 255, 255, 0.72);
    box-shadow: 0 30px 80px rgba(9, 24, 43, 0.28);
    backdrop-filter: blur(16px);
    z-index: 1000;
}

#npc-dialog p {
    color: #102033;
    line-height: 1.5;
}

#npc-dialog button {
    width: 100%;
    background: #102033;
}

@media (min-width: 768px) {
    #mobile-controls {
        display: none;
    }
}

@media screen and (max-height: 480px) {
    #welcome-text {
        display: none;
    }

    #enter-button {
        display: none;
    }

    #turn-device-sideways {
        display: block;
    }
}

.dark-mode {
    filter: brightness(0.9);
}

.dark-mode a {
    color: #BB86FC;
}

.dark-mode button {
    background-color: #333;
    color: #fff;
    border-color: #444;
}

.dark-mode #welcome-screen {
    background-color: #333;
}

.dark-mode #game-container {
    background-color: #222;
}

.dark-mode .content-section,
.dark-mode .project {
    background-color: #1e1e1e;
    color: #fff;
}

.dark-mode-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: black;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

.dark-mode-toggle.dark-mode {
    background: white;
}

.dark-mode body {
    background-color: #000;
}

.dark-mode #main-content {
    background-color: #000;
}

.dark-mode #welcome-screen {
    background-color: #333;
}