@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;700&display=swap');

:root {
    --background-color: #f8f8f8;
    --text-color: #333;
    --container-background: white;
    --container-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --button-background: #6c5ce7;
    --button-hover-background: #5c4ce3;
    --button-text-color: white;
    --h1-color: #333;
    --menu-display-background: #f0f0f0;
}

body {
    background: var(--background-color);
    color: var(--text-color);
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 20px;
    transition: background-color 0.4s ease, color 0.4s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
}

body.dark-mode {
    --background-color: #282c36;
    --text-color: #e0e0e0;
    --container-background: #3a3f4c;
    --container-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    --button-background: #a29bfe;
    --button-hover-background: #9087fa;
    --button-text-color: #282c36;
    --h1-color: #a29bfe;
    --menu-display-background: #4a4f5f;
}

.container {
    background: var(--container-background);
    max-width: 420px;
    width: 100%;
    margin: 0 auto;
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--container-shadow);
    text-align: center;
    transition: background-color 0.4s ease, box-shadow 0.4s ease;
}

.container h1 {
    color: var(--h1-color);
    font-size: 2.2em;
    font-weight: 700;
    margin: 0 0 30px;
    letter-spacing: -0.03em;
}

#menu-display {
    background: var(--menu-display-background);
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 25px;
    font-size: 1.8em;
    font-weight: 500;
    color: var(--text-color);
    min-height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: background-color 0.4s ease, border-color 0.4s ease;
}

#menu-display p {
    margin: 0;
}

#select-menu-btn {
    display: block;
    width: 100%;
    background: var(--button-background);
    color: var(--button-text-color);
    padding: 18px;
    border-radius: 8px;
    box-shadow: var(--container-shadow);
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: 700;
    letter-spacing: 0.05em;
    transition: background-color 0.3s ease, transform 0.1s ease;
}

#select-menu-btn:hover:not(:disabled) {
    background-color: var(--button-hover-background);
    transform: translateY(-1px);
}

#select-menu-btn:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    .container {
        margin-top: 0;
        box-shadow: none;
        border-radius: 0;
        padding: 20px;
    }
    .container h1 {
        font-size: 1.8em;
    }
    #menu-display {
        font-size: 1.4em;
        min-height: 60px;
    }
}

#theme-toggle-btn {
    position: fixed;
    top: 25px;
    right: 25px;
    padding: 12px 18px;
    border-radius: 8px;
    border: none;
    background-color: var(--button-background);
    color: var(--button-text-color);
    cursor: pointer;
    box-shadow: var(--container-shadow);
    z-index: 100;
    font-size: 0.9em;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.1s ease;
}

#theme-toggle-btn:hover {
    filter: brightness(110%);
    transform: translateY(-1px);
}