:root {
    /* พื้นผิว */
    --cream: #fff7e6;
    --paper: #fffdf8;
    --ink: #2b241d;
    --line: #eadfc8;

    /* สีหลัก - แดง */
    --chili: #c23b33;
    --chili-dark: #8f2820;
    --chili-light: #f4ded9;

    /* สีรอง */
    --navy: #1e3a52;
    --marigold: #e8a230;
    --teal: #1f6f63;

    /* alias ให้ใช้งานง่าย */
    --primary: var(--chili);
    --primary-hover: var(--chili-dark);
    --accent: var(--navy);
    --seal: var(--marigold);
    --success: var(--teal);

    --text: var(--ink);
    --text-muted: #6b6152;
    --bg: var(--cream);
    --surface: var(--paper);
    --border: var(--line);

    /* ระบบเงา / ระยะ ให้ใช้ซ้ำได้ทั้งไฟล์ */
    --shadow-sm: 0 1px 3px rgba(43, 36, 29, 0.08);
    --shadow-md: 0 4px 14px rgba(43, 36, 29, 0.12);
    --shadow-lift: 0 10px 24px rgba(43, 36, 29, 0.16);
    --radius-sm: 8px;
    --radius-md: 14px;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: 'Courier New', Courier, monospace;
    margin: 0;
    padding: 0;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.55;
}

/* ---------- Header ---------- */
header {
    background-color: var(--chili-dark);
    background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(0, 0, 0, 0.08));
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    color: var(--cream);
    gap: 10px;
    padding: 14px 20px;
    border-bottom: 3px solid var(--marigold);
    box-shadow: var(--shadow-md);
}

header h1 {
    font-size: clamp(1.6rem, 6vw, 3rem);
    margin: 0;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 0 rgba(0, 0, 0, 0.15);
}

header h2 {
    font-size: clamp(0.8rem, 3vw, 1rem);
    font-family: 'inter', sans-serif;
    color: var(--marigold);
    margin: 0;
    font-weight: 400;
    letter-spacing: 0.4px;
}

header a {
    color: var(--cream);
    text-align: center;
    margin-left: auto;
    margin-right: 0;
    text-decoration: none;
    padding: 6px 14px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: var(--radius-sm);
    transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

header a:hover {
    background-color: rgba(255, 255, 255, 0.12);
    border-color: var(--marigold);
}

/* ---------- Footer ---------- */
body footer {
    background-color: var(--chili);
    padding: 16px 20px;
    color: var(--cream);
    text-align: center;
    border-top: 3px solid var(--navy);
    letter-spacing: 0.3px;
}

/* ---------- Greetings / hero panel ---------- */
.greetings {
    background-color: var(--paper);
    width: 100%;
    max-width: 1520px;
    margin: 24px auto;
    border: 2px solid var(--navy);
    border-bottom: 10px solid var(--navy);
    border-radius: var(--radius-md);
    text-align: left;
    padding: 20px 24px;
    font-family: 'Courier New', Courier, monospace;
    color: var(--ink);
    font-size: clamp(0.95rem, 3vw, 20px);
    box-shadow: var(--shadow-md);
}

.greetings p {
    margin-top: 0;
    margin-left: 4px;
    color: var(--text-muted);
}

.greetings h1 {
    margin: 0 0 10px;
    font-size: clamp(1.3rem, 5vw, 2rem);
    color: var(--chili-dark);
    border-bottom: 2px dashed var(--line);
    padding-bottom: 10px;
}

.greetings-news {
    background-color: var(--chili-light);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
}

/* ---------- Main ---------- */
main {
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--bg);
    width: 100%;
    overflow-x: hidden;
    padding-bottom: 20px;
}

.tools {
    width: 100%;
    max-width: 1600px;
    padding: 0 12px;
}

.toolImg {
    width: 100%;
    max-width: 400px;
    height: auto;
    margin-top: 10px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.toolImg:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.tool-category {
    display: flex;
    flex-direction: column;
    padding: 0 0 30px 0;
    background-color: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    margin: 0 0 24px 0;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.tool-category h3 {
    font-size: clamp(1.3rem, 5vw, 30px);
    background-color: var(--chili);
    background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent);
    padding: 10px 6px 10px 16px;
    color: var(--paper);
    margin: 0 0 20px 0;
    letter-spacing: 0.4px;
}

.toolBtn {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 20px;
    margin-left: 20px;
    margin-right: 20px;
    justify-content: left;
}

.functionBtn {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 18px 16px;
    background-color: var(--line);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--ink);
    font-size: clamp(0.95rem, 3vw, 20px);
    flex: 1 1 140px;
    max-width: 220px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.functionBtn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lift);
    border-color: var(--chili);
    background-color: var(--paper);
}

/* ---------- Blog ---------- */
.blog-container {
    background-color: var(--marigold);
    background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.15), transparent);
    padding: 20px;
    border-radius: var(--radius-md);
    margin: 12px;
    width: calc(100% - 24px);
    max-width: 1300px;
    font-size: clamp(1rem, 3.5vw, 25px);
    box-shadow: var(--shadow-md);
}

.blog-container .bloggy {
    background-color: var(--paper);
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.blog-container h2 span {
    margin: 10px 0;
    display: inline-block;
    font-size: clamp(1.6rem, 6vw, 50px);
    font-family: 'Courier New', Courier, monospace;
    font-weight: bold;
    background-color: var(--ink);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    color: var(--cream);
}

.blog-container .bloggy h3 {
    color: rgb(103, 63, 15);
    font-family: 'Courier New', Courier, monospace;
    margin-top: 0;
}

.blog-container .space {
    margin-bottom: 60px;
}

#blogDate {
    margin-top: -8px;
    font-size: 15px;
    color: var(--teal);
    font-style: italic;
}

#BloggyDescription {
    margin-left: 4px;
    color: var(--chili-dark);
}

.slider {
    position: relative;
    width: 100%;
    margin: auto;
    overflow: hidden;
}

.slider img {
    width: 100%;
    display: none;
}

.slider button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    padding: 10px 15px;
    background-color: hsla(0, 0%, 0%, 0.351);
    color: white;
    border: none;
    cursor: pointer;

}

.prev-news {
    left: 0;
}

.next-news {
    right: 0;
}

@keyframes fade {
    from {opacity: .5}
    to {opacity: 1}
}

img.displayNewsSlide {
    display: block;
    animation-name: fade;
    animation-duration: 1.5s;
}

/* ----- มือถือ ----- */
@media screen and (max-width: 768px) {
    header {
        justify-content: center;
        text-align: center;
        padding: 12px;
    }

    header a {
        margin: 0 auto;
    }

    .greetings {
        border-width: 2px;
        border-bottom-width: 8px;
        margin: 12px;
        width: auto;
        padding: 16px 18px;
    }

    .toolBtn {
        gap: 12px;
        margin-left: 12px;
        margin-right: 12px;
    }

    .functionBtn {
        flex: 1 1 100%;
        max-width: 100%;
    }

    .blog-container {
        margin: 10px auto;
        width: calc(100% - 20px);
    }

    #BloggyDescription {
        margin-left: 0;
    }
}

@media screen and (max-width: 480px) {

    .greetings p,
    .greetings h1 {
        margin-left: 0;
    }

    .blog-container h2 span {
        padding: 4px 8px;
    }

    .newsImg {
        width: 100%;
        height: auto;
        border-radius: var(--radius-sm);
    }

    .blog-container {
        padding: 12px;
    }

    .tools h2 {
        text-align: center;
    }

    .functionBtn {
        max-width: 200px;
        margin-left: 0;
    }
}