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

:root {
    --primary-color: #2c3e50;
    --accent-color: #e67e22;
    --text-color: #333;
    --bg-color: #f9f9f9;
    --white: #ffffff;
    --border-color: #ddd;
    --marker-color: #fff9c4;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
    -webkit-text-size-adjust: 100%;
}

.container {
    max-width: 750px;
    margin: 0 auto;
    background-color: var(--white);
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
    padding-bottom: 80px; /* Space for sticky CTA */
}

header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 15px;
    text-align: center;
}

.site-title {
    font-size: 1.2rem;
    font-weight: bold;
}

article {
    padding: 20px;
}

h1 {
    font-size: 1.6rem;
    line-height: 1.4;
    margin-bottom: 20px;
    color: var(--primary-color);
    border-left: 5px solid var(--accent-color);
    padding-left: 15px;
}

h2 {
    font-size: 1.4rem;
    margin: 40px 0 20px;
    padding: 10px 15px;
    background-color: #f1f1f1;
    border-left: 5px solid var(--primary-color);
}

h3 {
    font-size: 1.2rem;
    margin: 30px 0 15px;
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 5px;
}

p {
    margin-bottom: 20px;
    font-size: 1rem;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

ul, ol {
    margin-bottom: 20px;
    padding-left: 25px;
}

li {
    margin-bottom: 10px;
}

/* Specific UI elements */
.summary-box {
    background-color: #fef9f3;
    border: 2px dashed var(--accent-color);
    padding: 20px;
    margin: 25px 0;
    border-radius: 8px;
}

.summary-box ul {
    margin-bottom: 0;
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    font-size: 0.9rem;
}

.spec-table th, .spec-table td {
    border: 1px solid var(--border-color);
    padding: 12px;
    text-align: left;
}

.spec-table th {
    background-color: #f5f5f5;
    width: 30%;
}

.note {
    background-color: #fff3f3;
    border: 1px solid #ffcdd2;
    padding: 15px;
    margin: 25px 0;
    font-size: 0.9rem;
    border-radius: 5px;
}

.note p:last-child {
    margin-bottom: 0;
}

.balloon {
    position: relative;
    background: #eef7ff;
    padding: 15px;
    border-radius: 10px;
    margin: 25px 0;
}

.balloon::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 30px;
    border-width: 15px 15px 0;
    border-style: solid;
    border-color: #eef7ff transparent;
    display: block;
    width: 0;
}

.js-marker {
    background-color: var(--marker-color);
    font-weight: bold;
    padding: 2px 0;
}

/* CTA Styles */
.cta-area {
    background-color: #fff9f0;
    border: 2px solid var(--accent-color);
    padding: 30px 20px;
    text-align: center;
    margin: 50px 0;
    border-radius: 10px;
}

.cta-area p {
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(to bottom, #f39c12, #e67e22);
    color: var(--white);
    padding: 18px 30px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1.2rem;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(230, 126, 34, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
    width: 100%;
    max-width: 400px;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(230, 126, 34, 0.5);
}

/* Sticky CTA */
.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 10px 15px;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: transform 0.3s ease-in-out;
    transform: translateY(100%);
}

.sticky-cta.show {
    transform: translateY(0);
}

.sticky-cta-button {
    background: linear-gradient(to right, #f39c12, #e67e22);
    color: var(--white);
    padding: 12px 25px;
    text-decoration: none;
    font-weight: bold;
    font-size: 1rem;
    border-radius: 30px;
    width: 100%;
    max-width: 500px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(230, 126, 34, 0.3);
}

footer {
    text-align: center;
    padding: 30px 20px;
    font-size: 0.8rem;
    color: #888;
    border-top: 1px solid var(--border-color);
}

/* Responsive adjustments */
@media (max-width: 600px) {
    h1 {
        font-size: 1.4rem;
    }
    h2 {
        font-size: 1.2rem;
    }
    .cta-button {
        font-size: 1rem;
        padding: 15px 20px;
    }
}