/* ================================
   Justin J. Abreu Portfolio
   Main Stylesheet
================================ */

/* ---------- Design variables ---------- */

:root {
    --background: #08090c;
    --background-soft: #0f1116;
    --surface: rgba(20, 22, 28, 0.82);
    --surface-solid: #15171d;
    --surface-hover: #1c1f27;

    --text-primary: #f7f3e7;
    --text-secondary: #aaa9a2;
    --text-muted: #74757a;

    --gold: #f4c84a;
    --gold-bright: #ffdb67;
    --gold-dark: #b98717;
    --gold-transparent: rgba(244, 200, 74, 0.12);

    --border: rgba(255, 255, 255, 0.09);
    --border-gold: rgba(244, 200, 74, 0.34);

    --shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
    --gold-glow: 0 0 38px rgba(244, 200, 74, 0.16);

    --page-width: 1180px;
    --header-height: 76px;
    --radius-large: 22px;
    --radius-medium: 14px;
    --transition: 180ms ease;
}

/* ---------- Reset ---------- */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
    min-height: 100vh;
    overflow-x: hidden;
    background:
        radial-gradient(
            circle at 76% 7%,
            rgba(244, 200, 74, 0.09),
            transparent 30rem
        ),
        radial-gradient(
            circle at 8% 48%,
            rgba(244, 200, 74, 0.04),
            transparent 26rem
        ),
        var(--background);
    color: var(--text-primary);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.7;
}

body::before {
    position: fixed;
    z-index: -2;
    inset: 0;
    content: "";
    pointer-events: none;
    opacity: 0.025;
    background-image:
        linear-gradient(
            rgba(255, 255, 255, 0.5) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.5) 1px,
            transparent 1px
        );
    background-size: 48px 48px;
}

body::after {
    position: fixed;
    z-index: -1;
    inset: 0;
    content: "";
    pointer-events: none;
    background:
        linear-gradient(
            180deg,
            transparent,
            rgba(0, 0, 0, 0.18)
        );
}

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

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    color: inherit;
    font: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

/* ---------- Header ---------- */

.site-header {
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    border-bottom: 1px solid var(--border);
    background: rgba(8, 9, 12, 0.78);
    backdrop-filter: blur(18px);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(calc(100% - 40px), var(--page-width));
    height: var(--header-height);
    margin: 0 auto;
}

.logo {
    position: relative;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.logo::after {
    display: inline-block;
    width: 7px;
    height: 7px;
    margin-left: 7px;
    border-radius: 50%;
    content: "";
    background: var(--gold);
    box-shadow: 0 0 16px var(--gold);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 34px;
}

.nav-links a {
    position: relative;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 650;
    transition:
        color var(--transition),
        transform var(--transition);
}

.nav-links a::after {
    position: absolute;
    right: 0;
    bottom: -8px;
    left: 0;
    height: 2px;
    content: "";
    background: var(--gold);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition);
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--gold-bright);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
    transform: scaleX(1);
    transform-origin: left;
}

.menu-button {
    display: none;
    border: 0;
    background: transparent;
    cursor: pointer;
    font-size: 1.45rem;
}

/* ---------- Shared layout ---------- */

main {
    width: 100%;
}

.content-section {
    width: min(calc(100% - 40px), var(--page-width));
    margin: 0 auto;
    padding: 108px 0;
}

.section-heading {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.section-number {
    color: var(--gold);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.12em;
}

.section-heading h2,
.contact-panel h2 {
    font-size: clamp(1.9rem, 4vw, 3rem);
    line-height: 1.15;
    letter-spacing: -0.04em;
}

.section-heading::after {
    width: min(220px, 24vw);
    height: 1px;
    content: "";
    background: linear-gradient(
        90deg,
        var(--border-gold),
        transparent
    );
}

.section-introduction {
    max-width: 720px;
    margin-bottom: 42px;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

/* ---------- Hero ---------- */

.hero {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding:
        calc(var(--header-height) + 70px)
        20px
        70px;
}

.hero::before {
    position: absolute;
    top: 17%;
    right: -150px;
    width: 440px;
    height: 440px;
    border-radius: 50%;
    content: "";
    pointer-events: none;
    background: rgba(244, 200, 74, 0.08);
    filter: blur(82px);
}

.hero-content {
    position: relative;
    width: min(100%, var(--page-width));
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    color: var(--gold);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.eyebrow::before {
    width: 38px;
    height: 2px;
    content: "";
    background: var(--gold);
    box-shadow: 0 0 12px rgba(244, 200, 74, 0.6);
}

.hero h1 {
    max-width: 1000px;
    font-size: clamp(3.7rem, 10vw, 8.4rem);
    line-height: 0.93;
    letter-spacing: -0.075em;
}

.hero h1::first-letter {
    color: var(--gold-bright);
}

.hero-description {
    max-width: 760px;
    margin-top: 32px;
    color: var(--text-secondary);
    font-size: clamp(1rem, 2vw, 1.22rem);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 38px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 24px;
    border: 1px solid transparent;
    border-radius: 10px;
    font-size: 0.92rem;
    font-weight: 800;
    transition:
        transform var(--transition),
        border-color var(--transition),
        background var(--transition),
        box-shadow var(--transition);
}

.button:hover {
    transform: translateY(-3px);
}

.primary-button {
    background: var(--gold);
    color: #11100b;
    box-shadow: var(--gold-glow);
}

.primary-button:hover {
    background: var(--gold-bright);
    box-shadow: 0 12px 36px rgba(244, 200, 74, 0.25);
}

.secondary-button {
    border-color: var(--border-gold);
    background: var(--gold-transparent);
    color: var(--gold-bright);
}

.secondary-button:hover {
    border-color: var(--gold);
    background: rgba(244, 200, 74, 0.2);
}

.scroll-indicator {
    position: absolute;
    bottom: 34px;
    left: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    transform: translateX(-50%);
}

.scroll-line {
    width: 1px;
    height: 38px;
    background: linear-gradient(
        var(--gold),
        transparent
    );
}

/* ---------- About ---------- */

.about-layout {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 44px;
}

.about-text {
    color: var(--text-secondary);
    font-size: clamp(1.04rem, 2vw, 1.24rem);
    line-height: 1.9;
}

.secondary-about-text {
    color: #8f908f;
}

/* ---------- Projects ---------- */

.project-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.project-card {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-large);
    background:
        linear-gradient(
            145deg,
            rgba(255, 255, 255, 0.035),
            transparent
        ),
        var(--surface);
    box-shadow: var(--shadow);
    transition:
        transform 220ms ease,
        border-color 220ms ease,
        box-shadow 220ms ease;
}

.project-card::before {
    position: absolute;
    z-index: 3;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    content: "";
    background: linear-gradient(
        90deg,
        transparent,
        var(--gold),
        transparent
    );
    opacity: 0;
    transition: opacity 220ms ease;
}

.project-card:hover {
    border-color: var(--border-gold);
    box-shadow:
        var(--shadow),
        0 0 38px rgba(244, 200, 74, 0.08);
    transform: translateY(-8px);
}

.project-card:hover::before {
    opacity: 1;
}

.project-media {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 9;
    border-bottom: 1px solid var(--border);
    background: var(--background-soft);
}

.project-image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition:
        transform 500ms ease,
        filter 500ms ease;
}

.project-card:hover .project-image {
    filter: brightness(1.08);
    transform: scale(1.045);
}

.project-placeholder {
    display: grid;
    place-items: center;
    background:
        radial-gradient(
            circle at center,
            rgba(244, 200, 74, 0.15),
            transparent 55%
        ),
        linear-gradient(
            145deg,
            #13151b,
            #0c0d11
        );
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 24px;
    text-align: center;
}

.placeholder-label {
    color: var(--gold-bright);
    font-size: 1rem;
    font-weight: 800;
}

.placeholder-subtitle {
    color: var(--text-muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.7rem;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.project-status {
    position: absolute;
    z-index: 2;
    top: 14px;
    right: 14px;
    padding: 6px 10px;
    border: 1px solid var(--border-gold);
    border-radius: 999px;
    background: rgba(9, 10, 13, 0.78);
    color: var(--gold-bright);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.64rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    backdrop-filter: blur(10px);
}

.project-card-content {
    padding: 26px;
}

.project-type {
    margin-bottom: 10px;
    color: var(--gold);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.72rem;
    font-weight: 750;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.project-card h3,
.engineering-card h3 {
    margin-bottom: 14px;
    font-size: 1.35rem;
    line-height: 1.25;
}

.project-card-content > p:not(.project-type) {
    min-height: 155px;
    color: var(--text-secondary);
    font-size: 0.93rem;
}

.project-links {
    margin-top: 24px;
}

.project-links a {
    display: inline-block;
    color: var(--gold-bright);
    font-size: 0.9rem;
    font-weight: 800;
}

.project-links a::after {
    display: inline-block;
    margin-left: 8px;
    content: "→";
    transition: transform var(--transition);
}

.project-links a:hover::after {
    transform: translateX(5px);
}

/* ---------- Engineering work ---------- */

.engineering-section {
    position: relative;
}

.engineering-grid {
    display: grid;
    gap: 14px;
}

.engineering-card {
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: 22px;
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: var(--surface);
    transition:
        border-color var(--transition),
        transform var(--transition),
        background var(--transition);
}

.engineering-card:hover {
    border-color: var(--border-gold);
    background: var(--surface-hover);
    transform: translateX(6px);
}

.engineering-number {
    color: var(--gold);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 1rem;
    font-weight: 800;
}

.engineering-card p:last-child {
    max-width: 820px;
    color: var(--text-secondary);
}

.inline-button {
    display: inline-flex;
    align-items: center;
    margin-top: 28px;
    padding: 13px 20px;
    border: 1px solid var(--border-gold);
    border-radius: 9px;
    color: var(--gold-bright);
    font-weight: 800;
    transition:
        background var(--transition),
        transform var(--transition);
}

.inline-button::after {
    margin-left: 9px;
    content: "→";
}

.inline-button:hover {
    background: var(--gold-transparent);
    transform: translateY(-3px);
}

/* ---------- Skills ---------- */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.skill-group {
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius-medium);
    background: var(--surface);
    transition:
        border-color var(--transition),
        transform var(--transition),
        background var(--transition);
}

.skill-group:hover {
    border-color: var(--border-gold);
    background: var(--surface-hover);
    transform: translateY(-4px);
}

.skill-label {
    margin-bottom: 7px;
    color: var(--gold);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.skill-group h3 {
    margin-bottom: 18px;
    font-size: 1.1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
}

.skill-tags span {
    padding: 7px 11px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.025);
    color: var(--text-secondary);
    font-size: 0.79rem;
}

/* ---------- Contact ---------- */

.contact-section {
    padding-bottom: 128px;
}

.contact-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
    gap: 50px;
    padding: 54px;
    border: 1px solid var(--border-gold);
    border-radius: var(--radius-large);
    background:
        radial-gradient(
            circle at 85% 15%,
            rgba(244, 200, 74, 0.12),
            transparent 22rem
        ),
        var(--surface);
    box-shadow: var(--shadow);
}

.contact-panel .section-number {
    margin-bottom: 10px;
}

.contact-panel h2 {
    margin-bottom: 20px;
}

.contact-panel p:not(.section-number) {
    max-width: 680px;
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-links a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 17px;
    border: 1px solid var(--border-gold);
    border-radius: 9px;
    color: var(--gold-bright);
    font-weight: 800;
    transition:
        background var(--transition),
        transform var(--transition);
}

.contact-links a::after {
    content: "↗";
}

.contact-links a:hover {
    background: var(--gold-transparent);
    transform: translateX(5px);
}

/* ---------- Footer ---------- */

footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: min(calc(100% - 40px), var(--page-width));
    margin: 0 auto;
    padding: 30px 0 46px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.72rem;
}

/* ---------- Scroll reveal ---------- */

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition:
        opacity 650ms ease,
        transform 650ms ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card:nth-child(2).reveal {
    transition-delay: 100ms;
}

.project-card:nth-child(3).reveal {
    transition-delay: 200ms;
}

.skill-group:nth-child(2).reveal {
    transition-delay: 80ms;
}

.skill-group:nth-child(3).reveal {
    transition-delay: 160ms;
}

.skill-group:nth-child(4).reveal {
    transition-delay: 240ms;
}

/* ---------- Accessibility ---------- */

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--gold-bright);
    outline-offset: 5px;
}

/* ---------- Responsive ---------- */

@media (max-width: 960px) {
    .project-grid {
        grid-template-columns: 1fr;
    }

    .project-card-content > p:not(.project-type) {
        min-height: auto;
    }

    .project-media {
        aspect-ratio: 16 / 7;
    }

    .contact-panel {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    :root {
        --header-height: 68px;
    }

    .menu-button {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: var(--header-height);
        right: 20px;
        left: 20px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        overflow: hidden;
        border: 1px solid var(--border);
        border-radius: 14px;
        background: rgba(16, 18, 23, 0.98);
        box-shadow: var(--shadow);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links li {
        border-bottom: 1px solid var(--border);
    }

    .nav-links li:last-child {
        border-bottom: 0;
    }

    .nav-links a {
        display: block;
        padding: 16px 18px;
    }

    .nav-links a::after {
        display: none;
    }

    .hero {
        place-items: center start;
    }

    .hero h1 {
        font-size: clamp(3.2rem, 18vw, 5.3rem);
    }

    .scroll-indicator {
        display: none;
    }

    .content-section {
        padding: 82px 0;
    }

    .about-layout,
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .section-heading::after {
        flex: 1;
    }

    .engineering-card {
        grid-template-columns: 45px 1fr;
    }

    .project-media {
        aspect-ratio: 16 / 9;
    }

    .contact-panel {
        padding: 34px;
    }

    footer {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 500px) {
    .navbar,
    .content-section,
    footer {
        width: min(calc(100% - 28px), var(--page-width));
    }

    .hero {
        padding-right: 14px;
        padding-left: 14px;
    }

    .hero-actions,
    .hero-actions .button {
        width: 100%;
    }

    .project-card-content {
        padding: 22px;
    }

    .engineering-card {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 23px;
    }

    .contact-panel {
        padding: 26px;
    }
}
/* ---------- Stacked featured projects ---------- */

.project-stack {
    display: grid;
    grid-template-columns: 1fr;
    gap: 26px;
}

.project-card-wide {
    width: 100%;
}

.project-card-wide .project-media {
    aspect-ratio: 21 / 9;
}

.project-card-wide .project-card-content > p:not(.project-type) {
    min-height: auto;
    max-width: 850px;
}

@media (max-width: 760px) {
    .project-card-wide .project-media {
        aspect-ratio: 16 / 9;
    }
}
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

/* ---------- Clickable project cards ---------- */

.clickable-project-card {
    cursor: pointer;
}

.clickable-project-card:focus-visible {
    border-color: var(--gold);
    outline: 2px solid var(--gold-bright);
    outline-offset: 5px;
}