/* ==========================================================================
   Topline Excavating LLC
   Mobile-first homepage stylesheet
   ========================================================================== */

/* ==========================================================================
   Design Tokens
   ========================================================================== */

:root {
    --color-black: #0b0b0b;
    --color-ink: #171717;
    --color-charcoal: #252525;
    --color-gray-900: #333333;
    --color-gray-700: #5f5f5f;
    --color-gray-500: #8a8a8a;
    --color-gray-200: #e6e6e6;
    --color-gray-100: #f5f5f5;
    --color-white: #ffffff;
    --color-red: #c8102e;
    --color-red-dark: #970c23;
    --color-red-soft: #fff1f3;

    --font-family-base: Arial, Helvetica, sans-serif;
    --font-size-small: 0.875rem;
    --font-size-base: 1rem;
    --font-size-medium: 1.125rem;
    --font-size-large: 1.375rem;
    --font-size-xl: 1.75rem;
    --font-size-2xl: 2.25rem;
    --font-size-3xl: 3rem;

    --line-height-tight: 1.1;
    --line-height-heading: 1.2;
    --line-height-body: 1.65;

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    --content-max-width: 76rem;
    --content-wide-max-width: 86rem;
    --radius-small: 0.375rem;
    --radius-medium: 0.5rem;
    --shadow-card: 0 1rem 2rem rgba(0, 0, 0, 0.08);
    --shadow-header: 0 0.75rem 1.5rem rgba(0, 0, 0, 0.12);
    --transition-fast: 160ms ease;
}

/* ==========================================================================
   Reset and Base
   ========================================================================== */

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

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    min-width: 20rem;
    color: var(--color-ink);
    background: var(--color-white);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-body);
    text-rendering: optimizeLegibility;
}

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

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

ul {
    list-style: none;
}

:focus-visible {
    outline: 0.1875rem solid var(--color-red);
    outline-offset: 0.25rem;
}

::selection {
    color: var(--color-white);
    background: var(--color-red);
}

.skip-link {
    position: absolute;
    top: var(--space-3);
    left: var(--space-3);
    z-index: 20;
    padding: var(--space-3) var(--space-4);
    color: var(--color-white);
    background: var(--color-red);
    border-radius: var(--radius-small);
    font-weight: 800;
    transform: translateY(-150%);
    transition: transform var(--transition-fast);
}

.skip-link:focus {
    transform: translateY(0);
}

/* ==========================================================================
   Shared Layout
   ========================================================================== */

main {
    background: var(--color-white);
}

section {
    padding: var(--space-16) var(--space-4);
    scroll-margin-top: 10rem;
}

#main-content {
    scroll-margin-top: 10rem;
}

.section-heading,
.services__list,
.why-topline__list,
.projects__grid,
.equipment__media,
.service-area__details,
.estimate-cta__content {
    width: min(100%, var(--content-max-width));
    margin-inline: auto;
}

.section-heading {
    margin-bottom: var(--space-8);
}

.section-actions {
    display: flex;
    width: min(100%, var(--content-max-width));
    margin: var(--space-8) auto 0;
}

.section-actions .button {
    width: 100%;
}

.section-actions--dark .button--primary {
    color: var(--color-white);
}

.section-heading__eyebrow,
.hero__eyebrow,
.estimate-cta__eyebrow {
    color: var(--color-red);
    font-size: var(--font-size-small);
    font-weight: 800;
    line-height: var(--line-height-tight);
    text-transform: uppercase;
}

.section-heading__title,
.estimate-cta__title {
    max-width: 44rem;
    margin-top: var(--space-3);
    color: var(--color-black);
    font-size: var(--font-size-xl);
    line-height: var(--line-height-heading);
}

.section-heading__summary,
.estimate-cta__summary {
    max-width: 42rem;
    margin-top: var(--space-4);
    color: var(--color-gray-700);
}

/* ==========================================================================
   Buttons and Links
   ========================================================================== */

.button,
.site-header__contact {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3rem;
    padding: 0.875rem 1.125rem;
    border: 0.125rem solid transparent;
    border-radius: var(--radius-small);
    font-size: var(--font-size-small);
    font-weight: 800;
    line-height: 1;
    text-align: center;
    text-transform: uppercase;
    transition:
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        color var(--transition-fast),
        transform var(--transition-fast);
}

.button:hover,
.site-header__contact:hover {
    transform: translateY(-0.0625rem);
}

.button--primary {
    color: var(--color-white);
    background: var(--color-red);
    border-color: var(--color-red);
}

.button--primary:hover {
    background: var(--color-red-dark);
    border-color: var(--color-red-dark);
}

.button--secondary {
    color: var(--color-white);
    background: transparent;
    border-color: currentColor;
}

.button--secondary:hover {
    color: var(--color-black);
    background: var(--color-white);
}

/* ==========================================================================
   Header and Navigation
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: var(--space-4);
    color: var(--color-white);
    background: rgba(11, 11, 11, 0.96);
    border-bottom: 0.1875rem solid var(--color-red);
    box-shadow: var(--shadow-header);
}

.site-header > * {
    min-width: 0;
}

.site-header__brand {
    justify-self: start;
    color: var(--color-white);
    font-size: var(--font-size-medium);
    font-weight: 900;
    line-height: var(--line-height-tight);
    text-transform: uppercase;
}

.site-header__logo {
    width: min(16rem, 70vw);
    max-height: 3.25rem;
    object-fit: contain;
}

.site-nav {
    overflow-x: auto;
    padding-bottom: var(--space-1);
}

.site-nav__list {
    display: flex;
    gap: var(--space-2);
    min-width: max-content;
}

.site-nav__link {
    display: block;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-small);
    color: var(--color-gray-200);
    font-size: var(--font-size-small);
    font-weight: 700;
    line-height: 1;
    transition:
        background-color var(--transition-fast),
        color var(--transition-fast);
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
    color: var(--color-white);
    background: var(--color-charcoal);
}

.site-header__contact {
    width: 100%;
    color: var(--color-white);
    background: var(--color-red);
    border-color: var(--color-red);
}

.site-header__contact:hover {
    background: var(--color-red-dark);
    border-color: var(--color-red-dark);
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
    position: relative;
    display: grid;
    min-height: 75vh;
    padding: 0;
    color: var(--color-white);
    background: var(--color-black);
    isolation: isolate;
}

.hero__content {
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: min(100%, var(--content-wide-max-width));
    min-height: 75vh;
    margin-inline: auto;
    padding: var(--space-16) var(--space-4);
}

.hero__title {
    max-width: 46rem;
    margin-top: var(--space-4);
    font-size: var(--font-size-2xl);
    line-height: var(--line-height-heading);
}

.hero__summary {
    max-width: 38rem;
    margin-top: var(--space-4);
    color: var(--color-gray-200);
    font-size: var(--font-size-medium);
}

.hero__actions,
.estimate-cta__actions {
    display: grid;
    gap: var(--space-3);
    width: 100%;
    margin-top: var(--space-6);
}

.hero__media {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero__media::after {
    position: absolute;
    inset: 0;
    content: "";
    background:
        linear-gradient(90deg, rgba(0, 0, 0, 0.84), rgba(0, 0, 0, 0.52) 48%, rgba(0, 0, 0, 0.28)),
        linear-gradient(0deg, rgba(0, 0, 0, 0.58), rgba(0, 0, 0, 0.08) 45%);
}

.hero__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ==========================================================================
   Services
   ========================================================================== */

.services {
    background: var(--color-white);
}

.services__list {
    display: grid;
    gap: var(--space-4);
}

.services__item {
    padding: var(--space-6);
    background: var(--color-white);
    border: 0.0625rem solid var(--color-gray-200);
    border-left: 0.25rem solid var(--color-red);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-card);
}

.services__title {
    color: var(--color-black);
    font-size: var(--font-size-large);
    line-height: var(--line-height-heading);
}

.services__summary {
    margin-top: var(--space-3);
    color: var(--color-gray-700);
}

/* ==========================================================================
   Why Topline
   ========================================================================== */

.why-topline {
    color: var(--color-white);
    background: var(--color-black);
}

.why-topline .section-heading__title {
    color: var(--color-white);
}

.why-topline .section-heading__summary {
    color: var(--color-gray-200);
}

.why-topline__list {
    display: grid;
    gap: var(--space-3);
}

.why-topline__item {
    position: relative;
    min-height: 3.5rem;
    padding: var(--space-4) var(--space-4) var(--space-4) var(--space-10);
    color: var(--color-white);
    background: var(--color-charcoal);
    border: 0.0625rem solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-medium);
    font-weight: 800;
}

.why-topline__item::before {
    position: absolute;
    top: 1.15rem;
    left: var(--space-4);
    width: 0.75rem;
    height: 0.75rem;
    content: "";
    background: var(--color-red);
    border-radius: 50%;
}

/* ==========================================================================
   Projects
   ========================================================================== */

.projects {
    background: var(--color-gray-100);
}

.projects__grid {
    display: grid;
    gap: var(--space-5);
}

.project-card {
    overflow: hidden;
    background: var(--color-white);
    border: 0.0625rem solid var(--color-gray-200);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-card);
}

.project-card__media {
    background: var(--color-gray-900);
}

.project-card__image {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.project-card__content {
    padding: var(--space-5);
}

.project-card__title {
    color: var(--color-black);
    font-size: var(--font-size-large);
    line-height: var(--line-height-heading);
}

.project-card__summary {
    margin-top: var(--space-3);
    color: var(--color-gray-700);
}

/* ==========================================================================
   Equipment
   ========================================================================== */

.equipment {
    background: var(--color-white);
}

.equipment__media {
    overflow: hidden;
    background: var(--color-gray-900);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-card);
}

.equipment__image {
    width: 100%;
    max-height: 32rem;
    object-fit: cover;
    aspect-ratio: 16 / 10;
}

/* ==========================================================================
   Service Area
   ========================================================================== */

.service-area {
    background: var(--color-gray-100);
}

.service-area__details {
    display: grid;
    gap: var(--space-4);
}

.service-area__radius,
.service-area__communities {
    padding: var(--space-5);
    background: var(--color-white);
    border: 0.0625rem solid var(--color-gray-200);
    border-radius: var(--radius-medium);
    color: var(--color-gray-900);
    font-weight: 700;
}

.service-area__radius {
    border-left: 0.25rem solid var(--color-red);
}

/* ==========================================================================
   Interior Pages
   ========================================================================== */

.page-hero {
    color: var(--color-white);
    background:
        linear-gradient(120deg, rgba(11, 11, 11, 0.98), rgba(37, 37, 37, 0.92)),
        var(--color-black);
}

.page-hero__content,
.content-section > *,
.page-cta__content {
    width: min(100%, var(--content-max-width));
    margin-inline: auto;
}

.page-hero__eyebrow {
    color: var(--color-red);
    font-size: var(--font-size-small);
    font-weight: 800;
    line-height: var(--line-height-tight);
    text-transform: uppercase;
}

.page-hero__title {
    max-width: 48rem;
    margin-top: var(--space-3);
    color: var(--color-white);
    font-size: var(--font-size-2xl);
    line-height: var(--line-height-heading);
}

.page-hero__summary {
    max-width: 44rem;
    margin-top: var(--space-4);
    color: var(--color-gray-200);
    font-size: var(--font-size-medium);
}

.page-hero__actions,
.page-cta__actions {
    display: grid;
    gap: var(--space-3);
    width: 100%;
    margin-top: var(--space-6);
}

.content-section {
    background: var(--color-white);
}

.content-section--muted {
    background: var(--color-gray-100);
}

.content-grid {
    display: grid;
    gap: var(--space-4);
}

.detail-card {
    padding: var(--space-6);
    background: var(--color-white);
    border: 0.0625rem solid var(--color-gray-200);
    border-left: 0.25rem solid var(--color-red);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-card);
}

.detail-card__title {
    color: var(--color-black);
    font-size: var(--font-size-large);
    line-height: var(--line-height-heading);
}

.detail-card__summary {
    margin-top: var(--space-3);
    color: var(--color-gray-700);
}

.detail-card__summary a {
    color: var(--color-red);
    font-weight: 800;
    text-decoration: underline;
    text-underline-offset: 0.2em;
}

.summary-list {
    display: grid;
    gap: var(--space-3);
    width: min(100%, var(--content-max-width));
    margin-inline: auto;
}

.summary-list__item {
    position: relative;
    padding: var(--space-4) var(--space-4) var(--space-4) var(--space-10);
    background: var(--color-white);
    border: 0.0625rem solid var(--color-gray-200);
    border-radius: var(--radius-medium);
    color: var(--color-gray-900);
    font-weight: 700;
}

.summary-list__item::before {
    position: absolute;
    top: 1.25rem;
    left: var(--space-4);
    width: 0.65rem;
    height: 0.65rem;
    content: "";
    background: var(--color-red);
    border-radius: 50%;
}

.page-cta {
    color: var(--color-white);
    background:
        linear-gradient(120deg, rgba(11, 11, 11, 0.96), rgba(37, 37, 37, 0.92)),
        var(--color-black);
}

.page-cta__content {
    padding: var(--space-8);
    background: rgba(255, 255, 255, 0.06);
    border: 0.0625rem solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius-medium);
}

.page-cta__title {
    color: var(--color-white);
    font-size: var(--font-size-xl);
    line-height: var(--line-height-heading);
}

.page-cta__summary {
    max-width: 42rem;
    margin-top: var(--space-4);
    color: var(--color-gray-200);
}

/* ==========================================================================
   Estimate CTA
   ========================================================================== */

.estimate-cta {
    color: var(--color-white);
    background:
        linear-gradient(120deg, rgba(11, 11, 11, 0.96), rgba(37, 37, 37, 0.92)),
        var(--color-black);
}

.estimate-cta__content {
    padding: var(--space-8);
    background: rgba(255, 255, 255, 0.06);
    border: 0.0625rem solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius-medium);
}

.estimate-cta__title {
    color: var(--color-white);
}

.estimate-cta__summary {
    color: var(--color-gray-200);
}

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

.site-footer {
    display: grid;
    gap: var(--space-6);
    padding: var(--space-10) var(--space-4);
    color: var(--color-gray-200);
    background: var(--color-black);
    border-top: 0.25rem solid var(--color-red);
}

.site-footer__brand,
.site-footer__contact,
.site-footer__nav {
    width: min(100%, var(--content-max-width));
    margin-inline: auto;
}

.site-footer__logo {
    width: min(18rem, 100%);
    max-height: 4rem;
    object-fit: contain;
}

.site-footer__summary {
    margin-top: var(--space-2);
    color: var(--color-gray-500);
}

.site-footer__contact {
    display: grid;
    gap: var(--space-2);
    font-style: normal;
}

.site-footer__link,
.site-footer__nav-link {
    color: var(--color-gray-200);
    transition: color var(--transition-fast);
}

.site-footer__link:hover,
.site-footer__nav-link:hover {
    color: var(--color-white);
}

.site-footer__nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3) var(--space-5);
}

.site-footer__nav-link {
    font-size: var(--font-size-small);
    font-weight: 700;
    text-transform: uppercase;
}

/* ==========================================================================
   Tablet
   ========================================================================== */

@media (min-width: 48rem) {
    section {
        padding: var(--space-20) var(--space-6);
        scroll-margin-top: 8rem;
    }

    #main-content {
        scroll-margin-top: 8rem;
    }

    .site-header {
        grid-template-columns: auto 1fr;
        align-items: center;
        padding: var(--space-4) max(var(--space-6), calc((100% - var(--content-wide-max-width)) / 2));
    }

    .site-nav {
        justify-self: end;
        padding-bottom: 0;
    }

    .site-header__contact {
        grid-column: 1 / -1;
        justify-self: start;
        width: auto;
    }

    .hero,
    .hero__content {
        min-height: 78vh;
    }

    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__actions,
    .estimate-cta__actions,
    .page-hero__actions,
    .page-cta__actions,
    .section-actions {
        display: flex;
        flex-wrap: wrap;
        width: auto;
    }

    .section-actions .button {
        width: auto;
    }

    .button {
        min-width: 12rem;
    }

    .services__list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .why-topline__list,
    .service-area__details {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .projects__grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .content-grid--two,
    .content-grid--three {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .site-footer {
        grid-template-columns: 1.5fr 1fr;
        padding-inline: max(var(--space-6), calc((100% - var(--content-max-width)) / 2));
    }

    .site-footer__brand,
    .site-footer__contact,
    .site-footer__nav {
        width: 100%;
    }

    .site-footer__nav {
        grid-column: 1 / -1;
    }
}

/* ==========================================================================
   Desktop
   ========================================================================== */

@media (min-width: 64rem) {
    .site-header {
        grid-template-columns: auto 1fr auto;
        gap: var(--space-6);
    }

    .site-header__contact {
        grid-column: auto;
    }

    section,
    #main-content {
        scroll-margin-top: 6rem;
    }

    .site-nav__list {
        gap: var(--space-1);
    }

    .site-nav__link {
        padding-inline: var(--space-4);
    }

    .hero,
    .hero__content {
        min-height: 94vh;
    }

    .hero__content {
        padding-inline: var(--space-8);
    }

    .services__list {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .why-topline__list {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .estimate-cta__content {
        display: grid;
        grid-template-columns: 1fr auto;
        gap: var(--space-8);
        align-items: center;
    }

    .estimate-cta__actions {
        justify-content: end;
        margin-top: 0;
    }

    .page-hero__title {
        font-size: var(--font-size-3xl);
    }

    .content-grid--three {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .page-cta__content {
        display: grid;
        grid-template-columns: 1fr auto;
        gap: var(--space-8);
        align-items: center;
    }

    .page-cta__actions {
        justify-content: end;
        margin-top: 0;
    }

    .site-footer {
        grid-template-columns: 1.2fr 0.8fr 1fr;
        align-items: start;
    }

    .site-footer__nav {
        grid-column: auto;
    }

    .site-footer__nav-list {
        justify-content: flex-end;
    }
}

/* ==========================================================================
   Large Screens
   ========================================================================== */

@media (min-width: 80rem) {
    .site-header {
        padding-inline: max(var(--space-8), calc((100% - var(--content-wide-max-width)) / 2));
    }

    .hero__title {
        max-width: 52rem;
    }
}