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

html {
    scroll-behavior: smooth;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

main {
    width: 90%;
    max-width: 65em;
    margin: 0 auto;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

.cg {
    font-family: "Cormorant Garamond", serif;
    font-optical-sizing: auto;
    font-weight: 300;
    font-style: normal;
}

.ps {
    font-family: "PT Serif", serif;
    font-weight: 400;
    font-style: normal;
}

.ms,
h4 {
    font-family: "Montserrat", sans-serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
}

header {
    margin: 4em 0;
    display: flex;
    justify-content: space-between;
}

header nav ul {
    display: flex;
    flex-direction: row;
    gap: 1em;
}

header nav li {
    list-style: none;
}

header nav a {
    display: inline-block;
    text-transform: uppercase;
    font-size: 0.75em;
    letter-spacing: 0.1em;
    padding: 1em;
    margin-top: -1em;
}

header nav a:hover {
    text-decoration: underline;
    text-underline-offset: 0.25em;
    text-decoration-thickness: 0.02em;
    text-decoration-color: #000;
}

.landing {
    margin: 9em 0;
}

.landing .subline {
    margin-top: 2.5em;
    display: flex;
    justify-content: space-between;
}

.landing h1 {
    margin: 0;
    font-size: 9em;
}

.landing p {
    font-size: 1.55em;
    max-width: 12em;
    line-height: 150%;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ── Big Buttons ── */

.big-buttons {
    border-top: 1px solid #eee;
    display: flex;
    flex-direction: row;
}

.big-button {
    flex: 1;
}

.big-button-content {
    padding: 4em 0;
}

.big-button:first-child {
    padding-right: 6em;
}

.big-button:last-child {
    border-left: 1px solid #eee;
    padding-left: 6em;
}

.big-button p {
    font-size: 1.25em;
    line-height: 150%;
}

h3 {
    font-weight: normal;
    font-size: 1.6em;
    margin-bottom: 0.5em;
}

/* ── Features / What I Do ── */

.features {
    padding: 5em 0;
}

h4 {
    text-transform: uppercase;
    color: #666;
    font-size: 0.75em;
    letter-spacing: 0.1em;
}

.feature-list ul {
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 3em;
    align-items: start;
}

.feature-list li {
    padding: 0.65em 0;
    list-style: none;
    min-width: 0;
}

.feature-list li::before {
    content: url(../img/bullet.svg);
    display: inline-block;
    width: 1em;
    height: 1em;
    padding-right: 0.25em;
    position: relative;
    bottom: 0.2em;
}

.skill-item {
    font-size: 1.5em;
    font-weight: normal;
    display: inline-block;
    cursor: default;
}

/* Collapse transition: opacity fades out first, then height shrinks */
.skill-reveal {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.4s cubic-bezier(0.4, 0, 0.2, 1) 0.05s,
                opacity 0.25s ease;
    opacity: 0;
}

.skill-reveal > .skill-desc {
    overflow: hidden;
    min-height: 0;
    font-size: 0.65em;
    color: #666;
    line-height: 170%;
    padding-top: 0;
    transition: padding 0.4s cubic-bezier(0.4, 0, 0.2, 1) 0.05s;
}

/* Expand transition: height opens first, then opacity fades in */
.skill-item:hover .skill-reveal {
    grid-template-rows: 1fr;
    opacity: 1;
    transition: grid-template-rows 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.4s ease 0.1s;
}

.skill-item:hover .skill-reveal > .skill-desc {
    padding-top: 0.5em;
    transition: padding 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── About Section ── */

.about {
    padding: 5em 0;
    border-top: 1px solid #eee;
}

.about h4 {
    margin-bottom: 2em;
}

.about-content {
    max-width: 48em;
}

.about-lead {
    font-size: 3.2em;
    line-height: 120%;
    margin-bottom: 0.6em;
}

.about-text p {
    font-size: 1.25em;
    line-height: 170%;
    color: #333;
}

.about-text p + p {
    margin-top: 1em;
}

/* ── Companies Section ── */

.companies {
    padding: 5em 0;
    border-top: 1px solid #eee;
}

.companies .leading {
    font-size: 1.25em;
    text-align: center;
    margin-bottom: 3em;
}

.company-list {
    display: flex;
    flex-direction: column;
    gap: 3em;
}

.company-entry {
    display: flex;
    align-items: flex-start;
    gap: 2.5em;
}

.company-entry .company-logo {
    flex-shrink: 0;
    width: 8em;
    display: flex;
    align-items: center;
}

.company-desc {
    font-size: 1.1em;
    line-height: 170%;
    color: #555;
}

.company-logo img {
    display: block;
    height: 3em;
    width: auto;
    filter: grayscale(1) contrast(10) brightness(0.05);
    mix-blend-mode: multiply;
}

.company-logo--sm img {
    height: 1.9em;
}

.company-logo--md img {
    height: 4em;
}

.company-logo--lg img {
    height: 5em;
}

/* ── Footer ── */

footer {
    padding: 5em 0;
    margin-top: 3em;
    border-top: 1px solid #eee;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25em;
}

footer p {
    font-family: "Montserrat", sans-serif;
    font-size: 0.7em;
    letter-spacing: 0.08em;
    color: #999;
    text-transform: uppercase;
}

/* ── Responsive ── */

@media (max-width: 768px) {
    header {
        padding: 1em 0;
        margin: 0;
        position: sticky;
        top: 0;
        z-index: 1;
        background-color: #fff;
    }

    .landing {
        margin: 5em 0;
    }

    .landing h1 {
        font-size: 7em;
        text-align: center;
    }

    .landing .subline {
        text-align: center;
        justify-content: center;
        align-items: center;
        flex-direction: column;
    }

    .big-buttons {
        flex-direction: column;
        border-top: none;
        border-bottom: 1px solid #eee;
    }

    .big-button:first-child,
    .big-button:last-child {
        padding: 0;
        border-top: 1px solid #eee;
        border-left: none;
    }

    .big-button-content {
        padding: 2em 0;
    }

    .features {
        padding: 3em 0;
    }

    .feature-list ul {
        grid-template-columns: 1fr;
    }

    .company-entry {
        flex-direction: column;
        gap: 1em;
    }

    .company-entry .company-logo {
        width: auto;
    }

    .about-lead {
        font-size: 2.4em;
    }
}

@media (max-width: 480px) {
    .landing {
        margin: 3em 0;
    }

    .landing h1 {
        font-size: 3.5em;
    }

    .landing p {
        font-size: 1.2em;
    }

    .about-lead {
        font-size: 1.8em;
    }

    .about-text p {
        font-size: 1.1em;
    }

    .features {
        padding: 2em 0;
    }

    .about {
        padding: 3em 0;
    }

    .companies {
        padding: 3em 0;
    }

    footer {
        padding: 3em 0;
        margin-top: 2em;
    }
}