/**
 * Tử Vi 2026 - Shared Stylesheet
 * Mobile-first responsive design
 * Font size: 18-20px for easy reading on all devices
 */

/* ===== BASE STYLES ===== */
body {
    box-sizing: border-box;
    min-width: 200px;
    max-width: 980px;
    margin: 0 auto;
    padding: 45px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
    font-size: 20px;
    line-height: 1.8;
    color: #24292f;
    background-color: #fff;
}

@media (max-width: 767px) {
    body {
        padding: 20px;
        font-size: 20px;
        line-height: 1.8;
    }
}

/* ===== HEADINGS ===== */
h1, h2, h3, h4, h5, h6 {
    margin-top: 32px;
    margin-bottom: 20px;
    font-weight: 600;
    line-height: 1.3;
}

h1 {
    font-size: 2.2em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid #d0d7de;
}

h2 {
    font-size: 1.8em;
    padding-bottom: 0.3em;
    border-bottom: 1px solid #d0d7de;
}

h3 {
    font-size: 1.4em;
}

h4 {
    font-size: 1.2em;
}

@media (max-width: 767px) {
    h1 { font-size: 1.8em; }
    h2 { font-size: 1.5em; }
    h3 { font-size: 1.3em; }
    h4 { font-size: 1.1em; }
}

/* ===== TEXT ELEMENTS ===== */
p {
    margin-top: 0;
    margin-bottom: 18px;
}

strong, b {
    font-weight: 600;
}

em, i {
    font-style: italic;
}

/* ===== BLOCKQUOTE ===== */
blockquote {
    margin: 0 0 20px;
    padding: 0.8em 1.2em;
    color: #57606a;
    border-left: 0.25em solid #d0d7de;
    background-color: #f6f8fa;
    border-radius: 4px;
}

@media (max-width: 767px) {
    blockquote {
        padding: 0.6em 1em;
        font-size: 0.95em;
    }
}

/* ===== LISTS ===== */
ul, ol {
    padding-left: 2em;
    margin-top: 0;
    margin-bottom: 18px;
}

li {
    margin-bottom: 8px;
}

@media (max-width: 767px) {
    ul, ol {
        padding-left: 1.5em;
    }
}

/* ===== TABLES ===== */
table {
    border-spacing: 0;
    border-collapse: collapse;
    display: block;
    width: max-content;
    max-width: 100%;
    overflow: auto;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

tr {
    background-color: #fff;
    border-top: 1px solid #d8dee4;
}

tr:nth-child(2n) {
    background-color: #f6f8fa;
}

th, td {
    padding: 10px 15px;
    border: 1px solid #d0d7de;
    font-size: 0.95em;
}

th {
    font-weight: 600;
    background-color: #f6f8fa;
}

@media (max-width: 767px) {
    table {
        font-size: 16px;
    }

    th, td {
        padding: 8px 10px;
        font-size: 0.9em;
    }
}

/* ===== HORIZONTAL RULE ===== */
hr {
    height: 0.25em;
    padding: 0;
    margin: 24px 0;
    background-color: #d0d7de;
    border: 0;
}

/* ===== CODE ===== */
code {
    padding: 0.2em 0.4em;
    margin: 0;
    font-size: 85%;
    background-color: rgba(175, 184, 193, 0.2);
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
}

pre {
    padding: 16px;
    overflow: auto;
    font-size: 85%;
    line-height: 1.45;
    background-color: #f6f8fa;
    border-radius: 6px;
    margin-bottom: 18px;
}

pre code {
    padding: 0;
    background-color: transparent;
}

/* ===== LINKS ===== */
a {
    color: #0969da;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

a:visited {
    color: #8250df;
}

/* ===== GITHUB ALERTS ===== */
.markdown-alert {
    padding: 0.8rem 1.2rem;
    margin-bottom: 20px;
    border-left: 0.25em solid;
    color: inherit;
    border-radius: 4px;
}

.markdown-alert-title {
    display: flex;
    font-weight: 600;
    align-items: center;
    line-height: 1;
    margin-bottom: 8px;
    font-size: 0.95em;
}

.markdown-alert-note {
    border-color: #0969da;
    background-color: #ddf4ff;
}

.markdown-alert-note .markdown-alert-title {
    color: #0969da;
}

.markdown-alert-tip {
    border-color: #1a7f37;
    background-color: #dafbe1;
}

.markdown-alert-tip .markdown-alert-title {
    color: #1a7f37;
}

.markdown-alert-important {
    border-color: #8250df;
    background-color: #f6f1fe;
}

.markdown-alert-important .markdown-alert-title {
    color: #8250df;
}

.markdown-alert-warning {
    border-color: #d29922;
    background-color: #fff8c5;
}

.markdown-alert-warning .markdown-alert-title {
    color: #9a6700;
}

.markdown-alert-caution {
    border-color: #d1242f;
    background-color: #ffebe9;
}

.markdown-alert-caution .markdown-alert-title {
    color: #d1242f;
}

@media (max-width: 767px) {
    .markdown-alert {
        padding: 0.6rem 1rem;
    }

    .markdown-alert-title {
        font-size: 0.9em;
    }
}

/* ===== IMAGES ===== */
img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto;
}

/* ===== SPECIAL STYLES FOR TỬ VI ===== */
.cung-section {
    background: #FFFAF0;
    border: 2px solid #D4AF37;
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
}

.star-rating {
    color: #FFD700;
    font-size: 1.2em;
}

.triangle-diagram {
    background: white;
    border: 2px solid #D4AF37;
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    white-space: pre;
    overflow-x: auto;
    font-size: 0.9em;
}

@media (max-width: 767px) {
    .triangle-diagram {
        font-size: 0.75em;
        padding: 15px;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    body {
        padding: 20px;
        font-size: 14px;
    }

    h1 {
        font-size: 1.8em;
    }

    h2 {
        font-size: 1.5em;
    }

    .markdown-alert {
        border: 1px solid #ccc;
    }
}

/* ===== SCROLL BEHAVIOR ===== */
html {
    scroll-behavior: smooth;
}

/* ===== SELECTION ===== */
::selection {
    background-color: #b3d4fc;
    color: #000;
}

::-moz-selection {
    background-color: #b3d4fc;
    color: #000;
}