@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swap');

:root{
    --primary-color: #2563EB;
    --secondary-color: #E0E7FF;
    --dark-color: #111827;
    --light-color: #F9FAFB;
    --white-color:#fff;
    --font-family-base:system-ui, -apple-system, BlinkMacSystemFont,
      "Segoe UI", Roboto, Arial, sans-serif;
}

/* Reset & base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

 html {
    scroll-behavior: smooth;
}

[id] {
    scroll-margin-top: 90px;
}

body {
    font-family: var(--font-family-base);
    background-color: var(--light-color);
    color: var(--dark-color);
    line-height: 1.6;
}
a{
    text-decoration: none;
    color: var(--dark-color);
    cursor: pointer;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}


h1{
font-size: clamp(1.5rem, 5vw, 2.5rem);
margin-block-end: 1rem;
}

h2{
 font-size: clamp(1.3rem, 4vw, 2rem);
 margin-block-end: 1rem;
}


h3{
font-size: clamp(1.1rem, 3vw, 1.5rem);
margin-top: 1.5rem;
margin-bottom: 0.5rem;
}
h4, h5{
    padding-block-end: 0.8rem;
}

p{
    font-size: clamp(1rem, 3vw, 1.2rem);
    margin-block-end: 1rem;
}
pre {
      background: #f4f4f4;
      padding-block: 3px;
      padding-inline: 3px;
      margin-block: 5px;
      overflow-x: auto;
    }

code {
      font-family: Consolas, monospace;
      color: var(--primary-color)
    }
hr {
      margin-block: 3rem;
    }

/* table */
table {
  border-collapse: collapse;
  width: 90%;
  margin-block-end: 1rem;
}
th {
  height: 50px;
  text-align: start;
  border-bottom: 1px solid var(--dark-color);
}
td {
    border-bottom: 1px solid var(--secondary-color);
    padding-inline: 0.4rem;
}
td:first-child {
    border-right: 1px solid var(--secondary-color);
}
tr:last-child td {
    border-bottom: none;
}




/* main */

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}
.main{
    display: grid;
    grid-template-columns: 1fr 260px;
    grid-template-rows: auto;
    margin-block: 2rem;
}
/* sidebar */
.sidebar{
    background: var(--secondary-color);
    border: 1px solid #d3daeb;
    padding-block: 1rem;
    padding-inline: 1rem;
    margin-block: 1rem;
}
.sidebar li{
    list-style: none;
    margin-bottom: 0.8rem;
}
.sidebar a:hover{
    color: var(--primary-color);
    text-decoration: underline;
}
.blog-container{
    width: 80%;
    max-width: 1000px;
    line-height: 1.8;
    margin-block: 2rem;
    margin-inline: auto;
}

.text-center{
    max-width: 100%;
    text-align: center;
}

.flex{
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.space-around{
    justify-content: space-around;
}
.underline{
    text-decoration: underline;
}
.innerlink a:hover{
  color: var(--primary-color);
  text-decoration: underline;
}
/* padding & margin */
.mb{
    margin-block: 2rem;
}

.mb-s{
    margin-block-start: 1.2rem;
}

.pb{
    padding-block: 0.5rem;
}
.pb-1{
    padding-block: 1rem;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 10px 20px;
    text-decoration: none;
    border-radius: 5px;
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--primary-color);
    padding: 8px 15px;
    text-decoration: none;
    border-radius: 5px;
}

/* post page */
.post-header{
    padding-block: 2rem;
    background:var(--secondary-color);
    padding-block: 1rem;
    padding-inline: 1.5rem;
    box-shadow: 5px 5px 15px #5a89ec;
}
.post-header ul{
    padding-inline-start: 2rem;
    padding-block-end: 1rem;
}
.post-description{
    margin-block: 2rem;
    margin-inline: 1rem;
    line-height: 2;
}
.post-description li{
    margin-inline-start: 1.2rem;
}
.post-date{
    font-size: 0.9rem;
    font-weight: bolder;
    padding-block-start: 0.5rem;
}
.note{
    border: 1px solid #e9e1e1;
    border-radius: 5px;
    padding: 0.6rem;
    margin: 0.7rem;
    box-shadow: 5px 5px 15px var(--secondary-color);
}
.note p{
    font-size: 0.9rem;
}
.top-page{
    font-size: 0.8rem;
    background-color: var(--primary-color);
    min-width: 50px;
    position: fixed;
    right: 5px;
    bottom: 5px;
    padding: 8px;
    font-weight: bold;
    border-radius: 10px;
}
.top-page a{
    color: white;
}