/* ============================================================
   Terra Incognita
   Main page / notebook cover
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Lato:wght@400;700&family=Playfair+Display:wght@500;600&display=swap");


/* ============================================================
   Global
   ============================================================ */

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
}

body {
    margin: 0;
    min-height: 100vh;

    font-family: "Lato", sans-serif;
    color: #292929;

    background:
        radial-gradient(
            circle at center,
            #626262 0%,
            #505050 65%,
            #414141 100%
        );

    padding: 50px 20px;
}


/* ============================================================
   Main notebook / cover
   ============================================================ */

main {
    width: 100%;
    max-width: 820px;
    min-height: calc(100vh - 100px);

    margin: 0 auto;
    padding: 85px 85px 70px;

    position: relative;

    background:
        linear-gradient(
            135deg,
            #242424 0%,
            #1d1d1d 50%,
            #171717 100%
        );

    color: #f4efe5;

    border-radius: 4px;

    box-shadow:
        0 25px 60px rgba(0, 0, 0, 0.35),
        0 5px 15px rgba(0, 0, 0, 0.25);

    overflow: hidden;
}


/* A very subtle cover texture */

main::before {
    content: "";

    position: absolute;
    inset: 0;

    pointer-events: none;

    opacity: 0.08;

    background-image:
        repeating-linear-gradient(
            0deg,
            rgba(255,255,255,0.08) 0,
            rgba(255,255,255,0.08) 1px,
            transparent 1px,
            transparent 4px
        );
}


/* ============================================================
   Cover content
   ============================================================ */

.cover {
    position: relative;
    z-index: 1;

    min-height: calc(100vh - 250px);

    display: flex;
    flex-direction: column;
}


/* Small label */

.cover-label {
    margin: 0 0 25px;

    font-size: 0.72rem;
    font-weight: 700;

    letter-spacing: 0.28em;
    text-transform: uppercase;

    color: #b9b1a2;
}


/* Main title */

.cover h1 {
    margin: 0;

    max-width: 650px;

    font-family: "Playfair Display", serif;

    font-size: clamp(3rem, 8vw, 6.2rem);
    line-height: 0.95;
    font-weight: 600;

    letter-spacing: -0.03em;

    color: #f5f0e6;
}


/* The shrug */

.shrug {
    margin-top: 28px;

    font-size: clamp(1.4rem, 3vw, 2rem);

    letter-spacing: 0.05em;

    color: #bdb5a6;
}


/* Decorative line */

.cover-rule {
    width: 90px;
    height: 1px;

    margin: 35px 0;

    background: #8f897e;
}


/* Description / introduction */

.cover-intro {
    max-width: 590px;

    margin: 0;

    font-size: 1.08rem;
    line-height: 1.75;

    color: #c9c3b8;
}


/* ============================================================
   Navigation
   ============================================================ */

.site-navigation {
    position: relative;
    z-index: 1;

    display: flex;
    flex-wrap: wrap;

    gap: 18px;

    margin-top: auto;
    padding-top: 60px;
}

.site-navigation a {
    display: inline-block;

    padding: 8px 0;

    color: #d8d1c4;

    text-decoration: none;

    font-size: 0.9rem;
    font-weight: 700;

    letter-spacing: 0.08em;
    text-transform: uppercase;

    border-bottom: 1px solid transparent;
}

.site-navigation a:hover {
    color: #fffaf0;

    border-bottom-color: #8f897e;
}


/* ============================================================
   Entry index
   ============================================================ */

.entries-section {
    position: relative;
    z-index: 1;

    margin-top: 65px;
    padding-top: 30px;

    border-top: 1px solid rgba(255, 255, 255, 0.12);
}


/* Collapsible heading */

.entries-section details {
    width: 100%;
}


/* Clickable "Diary" title */

.entries-section summary {
    cursor: pointer;

    list-style: none;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 12px 0;

    color: #eee7da;

    font-family: "Playfair Display", serif;

    font-size: 1.8rem;
    font-weight: 500;
}


/* Remove browser's default triangle */

.entries-section summary::-webkit-details-marker {
    display: none;
}


/* Our own indicator */

.entries-section summary::after {
    content: "+";

    font-family: "Lato", sans-serif;

    font-size: 1.3rem;
    font-weight: 400;

    color: #aaa296;

    transition: transform 0.2s ease;
}

.entries-section details[open] summary::after {
    content: "−";
}


/* Entry list */

.entries {
    list-style: none;

    margin: 22px 0 0;
    padding: 0;

    max-height: 420px;

    overflow-y: auto;

    border-left: 1px solid rgba(255,255,255,0.12);
}


/* Individual entry */

.entries li {
    margin: 0;
    padding: 0;
}

.entries a {
    display: flex;
    align-items: center;

    padding: 11px 18px;

    color: #bfb8ac;

    text-decoration: none;

    font-size: 0.95rem;

    border-bottom: 1px solid rgba(255,255,255,0.05);

    transition:
        background-color 0.15s ease,
        color 0.15s ease,
        padding-left 0.15s ease;
}

.entries a:hover {
    padding-left: 24px;

    color: #fffaf0;

    background: rgba(255,255,255,0.05);
}


/* ============================================================
   Linux / knowledge page
   ============================================================ */

.knowledge-page {
    position: relative;
    z-index: 1;

    padding-top: 20px;
}

.knowledge-page h1 {
    margin: 0 0 12px;

    font-family: "Playfair Display", serif;

    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1;

    color: #f5f0e6;
}

.knowledge-page .subtitle {
    margin: 0 0 45px;

    color: #aaa296;

    font-size: 1rem;
}


/* Knowledge categories */

.knowledge-section {
    margin-bottom: 35px;
}

.knowledge-section h2 {
    margin: 0 0 12px;

    font-family: "Playfair Display", serif;

    font-size: 1.5rem;
    font-weight: 500;

    color: #eee7da;
}

.knowledge-section p {
    margin: 0 0 1em;

    color: #c9c3b8;

    line-height: 1.75;
}


/* Linux command examples */

.knowledge-section pre {
    overflow-x: auto;

    margin: 18px 0;

    padding: 18px;

    background: #111;

    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 3px;
}

.knowledge-section code {
    font-family:
        "SFMono-Regular",
        Consolas,
        "Liberation Mono",
        monospace;

    font-size: 0.9rem;

    color: #ddd5c8;
}


/* ============================================================
   Footer
   ============================================================ */

.site-footer {
    position: relative;
    z-index: 1;

    margin-top: 60px;
    padding-top: 20px;

    border-top: 1px solid rgba(255,255,255,0.08);

    color: #777168;

    font-size: 0.78rem;
}


/* ============================================================
   Links
   ============================================================ */

a {
    transition: color 0.15s ease;
}


/* ============================================================
   Mobile
   ============================================================ */

@media (max-width: 700px) {

    body {
        padding: 0;
    }

    main {
        min-height: 100vh;

        padding:
            55px
            30px
            45px;

        border-radius: 0;

        box-shadow: none;
    }

    .cover {
        min-height: calc(100vh - 150px);
    }

    .cover h1 {
        font-size: clamp(3rem, 16vw, 5rem);
    }

    .cover-intro {
        font-size: 1rem;
    }

    .entries-section {
        margin-top: 45px;
    }

    .entries-section summary {
        font-size: 1.5rem;
    }

    .entries {
        max-height: 50vh;
    }

    .site-navigation {
        padding-top: 45px;
    }
}


/* ============================================================
   Small phones
   ============================================================ */

@media (max-width: 400px) {

    main {
        padding-left: 22px;
        padding-right: 22px;
    }

    .cover-label {
        letter-spacing: 0.2em;
    }

    .cover-rule {
        margin: 28px 0;
    }
}