:root {
    --bg-color: oklch(20% 0.05 260);
    --text-color: oklch(95% 0.01 260);
    --container-bg: oklch(25% 0.06 260 / 50%);
    --container-border: oklch(35% 0.06 260);
    --header-text: white;
    --card-shadow: rgba(0,0,0,0.2);
    --accent-color: oklch(70% 0.22 150); /* Mint Green */
}

:root.light-theme {
    --bg-color: oklch(98% 0.01 260);
    --text-color: oklch(20% 0.05 260);
    --container-bg: white;
    --container-border: oklch(90% 0.02 260);
    --header-text: oklch(20% 0.05 260);
    --card-shadow: rgba(0,0,0,0.1);
    --accent-color: oklch(60% 0.20 150);
}

body {
    font-family: 'Helvetica Neue', 'Apple SD Gothic Neo', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.05"><filter id="n"><feTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="10" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23n)"/></svg>');
    transition: background-color 0.5s ease, color 0.5s ease;
    padding: 2rem;
}

.main-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    width: 100%;
    max-width: 800px;
    text-align: center;
}

header {
    margin-bottom: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0;
    color: var(--header-text);
    text-shadow: 0 4px 15px var(--card-shadow);
    transition: color 0.5s ease;
}

.theme-toggle {
    background: none;
    border: 2px solid var(--container-border);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-color);
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    background: var(--container-bg);
    transform: scale(1.1);
}

.menu-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    padding: 4rem 3rem;
    background: var(--container-bg);
    border-radius: 32px;
    border: 1px solid var(--container-border);
    box-shadow: 
        0 20px 40px var(--card-shadow), 
        inset 0 1px 2px oklch(100% 0 0 / 10%);
    width: 100%;
    transition: all 0.5s ease;
    position: relative;
    overflow: hidden;
}

.menu-display {
    min-height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.placeholder-text {
    font-size: 1.5rem;
    opacity: 0.6;
    font-weight: 500;
}

.result-card {
    animation: slideUp 0.6s cubic-bezier(0.25, 1, 0.5, 1) forwards;
    text-align: center;
}

.result-category {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.5rem;
}

.result-menu {
    font-size: 4rem;
    font-weight: 900;
    color: var(--header-text);
    margin: 0;
    text-shadow: 0 10px 30px var(--card-shadow);
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.recommend-btn {
    padding: 1.2rem 3rem;
    border: none;
    border-radius: 50px;
    background-color: var(--accent-color);
    color: white;
    font-size: 1.4rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 
        0 0 20px var(--accent-color) / 40%, 
        0 5px 15px rgba(0,0,0,0.2);
}

.recommend-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 
        0 0 30px var(--accent-color) / 60%,
        0 8px 25px rgba(0,0,0,0.25);
}

.recommend-btn:active {
    transform: translateY(0) scale(1);
}

.partnership-container {
    margin-top: 4rem;
    padding: 3rem;
    background: var(--container-bg);
    border-radius: 24px;
    border: 1px solid var(--container-border);
    box-shadow: 0 20px 40px var(--card-shadow);
    width: 100%;
    text-align: left;
    transition: all 0.5s ease;
}

.partnership-container h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--header-text);
    text-align: center;
}

.comments-container {
    margin-top: 4rem;
    padding: 3rem;
    background: var(--container-bg);
    border-radius: 24px;
    border: 1px solid var(--container-border);
    box-shadow: 0 20px 40px var(--card-shadow);
    width: 100%;
    transition: all 0.5s ease;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--container-border);
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color) / 30%;
}

.submit-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    background-color: var(--accent-color);
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    align-self: center;
    margin-top: 1rem;
}

.submit-btn:hover {
    background-color: var(--accent-color);
    opacity: 0.9;
    transform: translateY(-2px);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    .result-menu { font-size: 2.8rem; }
    .menu-container, .partnership-container { padding: 2rem; }
}