/* ==========================================================================
   Anthony Njoku — portfolio theme
   Dark "operations console" UI. Plain CSS, no framework, no build step.
   --------------------------------------------------------------------------
   01. Tokens
   02. Reset & base
   03. Utilities & shared pieces
   04. Top bar & navigation
   05. Hero & status console
   06. About & stack
   07. Work: filters, projects
   08. Metrics
   09. Contact
   10. Footer
   11. Reveal animation
   12. Responsive
   ========================================================================== */

/* ==========================================================================
   01. Tokens
   ========================================================================== */

:root {
    /* Surfaces */
    --bg: #070b10;
    --bg-alt: #090f16;
    --panel: #0c141c;
    --panel-2: #101a24;
    --line: #1a2836;
    --line-2: #29405a;

    /* Type */
    --text: #dae5ef;
    --text-mid: #a8bccd;
    --text-dim: #7b91a5;

    /* Signal colours */
    --accent: #3ddc97;
    --accent-ink: #04170f;
    --accent-soft: rgba(61, 220, 151, 0.1);
    --accent-line: rgba(61, 220, 151, 0.35);
    --amber: #ffb454;

    --grid: rgba(122, 165, 200, 0.055);

    /* Shape */
    --radius: 10px;
    --radius-sm: 6px;
    --maxw: 1140px;
    --bar-h: 68px;

    /* Type stacks */
    --mono: ui-monospace, "SFMono-Regular", "SF Mono", Menlo, Consolas,
        "Liberation Mono", "Roboto Mono", monospace;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
        Arial, sans-serif;

    --t: 180ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   02. Reset & base
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

h1,
h2,
h3,
h4 {
    margin: 0;
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: -0.02em;
}

p {
    margin: 0;
}

ul,
ol,
dl,
dd {
    margin: 0;
    padding: 0;
    list-style: none;
}

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

button {
    font: inherit;
    color: inherit;
    background: none;
    border: 0;
    cursor: pointer;
}

[hidden] {
    display: none !important;
}

::selection {
    background: var(--accent);
    color: var(--accent-ink);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 3px;
}

/* Anchor targets clear the sticky bar */
section[id] {
    scroll-margin-top: calc(var(--bar-h) + 16px);
}

/* Firefox/thin scrollbars */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--line-2) var(--bg);
}

*::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

*::-webkit-scrollbar-track {
    background: var(--bg);
}

*::-webkit-scrollbar-thumb {
    background: var(--line-2);
    border-radius: 99px;
    border: 2px solid var(--bg);
}

/* ==========================================================================
   03. Utilities & shared pieces
   ========================================================================== */

.container {
    width: 100%;
    max-width: var(--maxw);
    margin-inline: auto;
    padding-inline: 22px;
}

.icon-sprite {
    display: none;
}

.icon {
    width: 1.15em;
    height: 1.15em;
    flex: none;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.skip-link {
    position: absolute;
    left: 16px;
    top: -60px;
    z-index: 100;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: var(--accent-ink);
    font-weight: 600;
    transition: top var(--t);
}

.skip-link:focus {
    top: 12px;
}

.section {
    padding: 96px 0;
}

.section--alt {
    background: var(--bg-alt);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.section--tight {
    padding: 72px 0;
}

.section__head {
    max-width: 660px;
    margin-bottom: 56px;
}

.section__title {
    font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem);
    margin-bottom: 16px;
}

.section__lede {
    color: var(--text-mid);
    font-size: 1.0625rem;
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.eyebrow__tick {
    width: 22px;
    height: 1px;
    background: var(--accent);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 13px 22px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    white-space: nowrap;
    transition: background var(--t), border-color var(--t), color var(--t),
        transform var(--t);
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn--primary {
    background: var(--accent);
    color: var(--accent-ink);
}

.btn--primary:hover {
    background: #58e8a9;
}

.btn--outline {
    border-color: var(--line-2);
    color: var(--text);
}

.btn--outline:hover {
    border-color: var(--accent-line);
    background: var(--accent-soft);
    color: var(--accent);
}

.btn--sm {
    padding: 9px 15px;
    font-size: 0.875rem;
}

/* Inline text link with icon */
.link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-mid);
    transition: color var(--t);
}

.link:hover {
    color: var(--accent);
}

/* The one action worth clicking on a card: the thing is actually running. */
.link--live {
    padding: 7px 14px;
    border: 1px solid var(--accent-line);
    border-radius: 99px;
    background: var(--accent-soft);
    color: var(--accent);
}

.link--live:hover {
    border-color: var(--accent);
    background: rgba(61, 220, 151, 0.2);
    color: var(--accent);
}

/* Status dot */
.status-dot {
    position: relative;
    display: inline-block;
    width: 7px;
    height: 7px;
    flex: none;
    border-radius: 50%;
    background: var(--accent);
}

.status-dot::after {
    content: "";
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 1px solid var(--accent);
    opacity: 0;
    animation: ping 2.6s ease-out infinite;
}

@keyframes ping {
    0% {
        transform: scale(0.6);
        opacity: 0.7;
    }

    70%,
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

/* ==========================================================================
   04. Top bar & navigation
   ========================================================================== */

.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(7, 11, 16, 0.72);
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: border-color var(--t), background var(--t);
}

.topbar.is-scrolled {
    background: rgba(7, 11, 16, 0.94);
    border-bottom-color: var(--line);
}

.topbar__inner {
    display: flex;
    align-items: center;
    gap: 18px;
    height: var(--bar-h);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    margin-right: auto;
}

.brand__mark {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    flex: none;
    border: 1px solid var(--accent-line);
    border-radius: 8px;
    background: var(--accent-soft);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.8125rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.brand__text {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
}

.brand__name {
    font-size: 0.9375rem;
    font-weight: 600;
}

.brand__role {
    font-family: var(--mono);
    font-size: 0.6875rem;
    color: var(--text-dim);
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav__link {
    display: inline-block;
    padding: 8px 13px;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    color: var(--text-mid);
    transition: color var(--t), background var(--t);
}

.nav__link:hover {
    color: var(--text);
    background: var(--panel);
}

.nav__link.is-active {
    color: var(--accent);
}

.nav__resume {
    margin-left: 8px;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    flex: none;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--panel);
}

.nav-toggle__icon {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
}

.nav-toggle__icon--close {
    display: none;
}

.topbar.is-open .nav-toggle__icon--open {
    display: none;
}

.topbar.is-open .nav-toggle__icon--close {
    display: block;
}

/* ==========================================================================
   05. Hero & status console
   ========================================================================== */

.hero {
    position: relative;
    overflow: hidden;
    padding: clamp(72px, 9vw, 132px) 0 clamp(72px, 8vw, 116px);
    border-bottom: 1px solid var(--line);
}

/* faint engineering grid, faded out at the edges */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(var(--grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid) 1px, transparent 1px);
    background-size: 58px 58px;
    -webkit-mask-image: radial-gradient(ellipse 78% 68% at 50% 0%, #000 15%, transparent 78%);
    mask-image: radial-gradient(ellipse 78% 68% at 50% 0%, #000 15%, transparent 78%);
    pointer-events: none;
}

.hero::after {
    content: "";
    position: absolute;
    top: -260px;
    left: 50%;
    width: min(920px, 130vw);
    height: 460px;
    transform: translateX(-50%);
    background: radial-gradient(closest-side, rgba(61, 220, 151, 0.16), transparent 78%);
    pointer-events: none;
}

.hero__grid {
    position: relative;
    z-index: 1;
    display: grid;
    gap: clamp(40px, 5vw, 64px);
    align-items: center;
}

.hero__title {
    font-size: clamp(2.25rem, 1.1rem + 5.2vw, 4rem);
    letter-spacing: -0.035em;
    margin-bottom: 22px;
}

.hero__title-accent {
    display: block;
    margin-top: 10px;
    font-size: clamp(1.0625rem, 0.9rem + 1.1vw, 1.5rem);
    font-weight: 400;
    letter-spacing: -0.01em;
    color: var(--text-dim);
}

.hero__lede {
    max-width: 54ch;
    margin-bottom: 34px;
    font-size: 1.0625rem;
    color: var(--text-mid);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

/* --- console panel --- */

.console {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: linear-gradient(180deg, var(--panel-2), var(--panel));
    box-shadow: 0 24px 60px -34px rgba(0, 0, 0, 0.95);
    overflow: hidden;
}

.console__bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.015);
}

.console__label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-mid);
}

.console__live {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
}

.console__rows {
    padding: 6px 16px 14px;
}

.console__row {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 14px;
    padding: 9px 0;
    border-bottom: 1px dashed var(--line);
}

.console__row:last-child {
    border-bottom: 0;
}

.console__row dt {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-dim);
}

.console__row dd {
    font-size: 0.875rem;
    color: var(--text);
}

.pipeline {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 14px 16px;
    border-top: 1px solid var(--line);
    background: rgba(61, 220, 151, 0.035);
}

.pipeline__stage {
    position: relative;
    padding: 5px 11px;
    border: 1px solid var(--line);
    border-radius: 99px;
    background: var(--panel);
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.06em;
    color: var(--text-mid);
}

.pipeline__stage:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -6px;
    top: 50%;
    width: 6px;
    height: 1px;
    background: var(--accent-line);
}

/* ==========================================================================
   06. About & stack
   ========================================================================== */

.prose {
    max-width: 70ch;
    margin-bottom: 56px;
}

.prose p {
    margin-bottom: 18px;
    color: var(--text-mid);
}

.prose p:last-child {
    margin-bottom: 0;
}

.prose strong {
    color: var(--text);
    font-weight: 600;
}

.stack {
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
}

.stack__heading {
    padding-bottom: 18px;
    margin-bottom: 26px;
    border-bottom: 1px solid var(--line);
    font-size: 0.75rem;
    font-family: var(--mono);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.stack__group + .stack__group {
    margin-top: 26px;
}

.stack__label {
    margin-bottom: 12px;
    font-size: 0.9375rem;
    font-weight: 600;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    padding: 6px 12px;
    border: 1px solid var(--line);
    border-radius: 99px;
    background: var(--bg-alt);
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-mid);
    transition: border-color var(--t), color var(--t), background var(--t);
}

.tag:hover {
    border-color: var(--accent-line);
    background: var(--accent-soft);
    color: var(--accent);
}

/* ==========================================================================
   07. Work: filters, projects
   ========================================================================== */

.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.filter {
    padding: 8px 15px;
    border: 1px solid var(--line);
    border-radius: 99px;
    background: var(--panel);
    font-family: var(--mono);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-mid);
    transition: border-color var(--t), color var(--t), background var(--t);
}

.filter:hover {
    border-color: var(--line-2);
    color: var(--text);
}

.filter.is-active {
    border-color: var(--accent-line);
    background: var(--accent-soft);
    color: var(--accent);
}

.filter-count {
    margin-bottom: 34px;
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-dim);
}

.projects {
    display: grid;
    gap: 24px;
}

.project {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    overflow: hidden;
    transition: border-color var(--t), transform var(--t), box-shadow var(--t);
}

.project:hover {
    border-color: var(--line-2);
    transform: translateY(-3px);
    box-shadow: 0 22px 46px -30px rgba(0, 0, 0, 0.9);
}

.project__media {
    position: relative;
    aspect-ratio: 16 / 10;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--line);
    overflow: hidden;
}

.project__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(0.85) contrast(1.02);
    transition: transform 400ms cubic-bezier(0.4, 0, 0.2, 1), filter var(--t);
}

.project:hover .project__media img {
    transform: scale(1.035);
    filter: saturate(1) contrast(1.05);
}

/* Wide application screenshots: show the whole UI rather than cropping the
   chrome off both edges. The letterbox uses the screenshot's own near-black so
   the bars blend into the app backdrop instead of framing it. */
.project__media--contain {
    background: #0b0d12;
}

.project__media--contain img {
    object-fit: contain;
    filter: none;
}

.project:hover .project__media--contain img {
    transform: none;
    filter: none;
}

.project__body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 22px;
}

.project__meta {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}

.project__index {
    font-family: var(--mono);
    font-size: 0.6875rem;
    color: var(--accent);
}

.project__tag {
    padding: 3px 9px;
    border: 1px solid var(--line);
    border-radius: 99px;
    font-family: var(--mono);
    font-size: 0.625rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.project__title {
    margin-bottom: 10px;
    font-size: 1.125rem;
}

.project__text {
    margin-bottom: 20px;
    font-size: 0.9375rem;
    color: var(--text-mid);
}

.project__links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.project__note {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-dim);
}

.empty-state {
    padding: 40px 0;
    font-family: var(--mono);
    font-size: 0.875rem;
    color: var(--text-dim);
}

/* ==========================================================================
   08. Metrics
   ========================================================================== */

.metrics {
    display: grid;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    overflow: hidden;
}

.metric {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 30px 24px;
    text-align: center;
}

.metric + .metric {
    border-top: 1px solid var(--line);
}

.metric__value {
    font-family: var(--mono);
    font-size: clamp(2rem, 1.4rem + 2vw, 2.75rem);
    font-weight: 700;
    line-height: 1;
    color: var(--accent);
}

.metric__label {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-dim);
}

/* ==========================================================================
   09. Contact
   ========================================================================== */

.contact {
    display: grid;
    gap: clamp(34px, 4vw, 60px);
    align-items: start;
}

.contact__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.spec {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    overflow: hidden;
}

.spec__row {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 16px;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--line);
}

.spec__row:last-child {
    border-bottom: 0;
}

.spec__row dt {
    font-family: var(--mono);
    font-size: 0.6875rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-dim);
}

.spec__row dd {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    font-size: 0.9375rem;
    overflow-wrap: anywhere;
}

.spec__row a {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--text);
    transition: color var(--t);
}

.spec__row a:hover {
    color: var(--accent);
}

.spec__row .icon {
    color: var(--text-dim);
}

/* ==========================================================================
   10. Footer
   ========================================================================== */

.footer {
    padding: 30px 0;
    background: var(--bg);
}

.footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.footer__copy,
.footer__top {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-dim);
}

.footer__top {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color var(--t);
}

.footer__top:hover {
    color: var(--accent);
}

.footer__top .icon {
    transform: rotate(-90deg);
}

/* ==========================================================================
   11. Reveal animation
   ========================================================================== */

.js [data-reveal] {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 600ms ease, transform 600ms cubic-bezier(0.22, 1, 0.36, 1);
}

.js [data-reveal].is-visible {
    opacity: 1;
    transform: none;
}

/* ==========================================================================
   12. Responsive
   ========================================================================== */

@media (min-width: 640px) {
    .metrics {
        grid-template-columns: repeat(3, 1fr);
    }

    .metric + .metric {
        border-top: 0;
        border-left: 1px solid var(--line);
    }
}

@media (min-width: 700px) {
    .projects {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 980px) {
    :root {
        --bar-h: 72px;
    }

    .hero__grid {
        grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
    }

    .contact {
        grid-template-columns: minmax(0, 1fr) minmax(340px, 0.85fr);
    }
}

@media (min-width: 1060px) {
    .projects {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --- Mobile navigation --- */

@media (max-width: 960px) {
    .nav-toggle {
        display: grid;
        order: 3;
    }

    .nav {
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        display: none;
        padding: 12px 22px 22px;
        background: rgba(9, 15, 22, 0.98);
        border-bottom: 1px solid var(--line);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
    }

    .topbar.is-open .nav {
        display: block;
    }

    .nav__list {
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
    }

    .nav__link {
        display: block;
        padding: 13px 4px;
        border-bottom: 1px solid var(--line);
        font-size: 1rem;
    }

    .nav__resume {
        width: 100%;
        margin: 16px 0 0;
    }
}

@media (max-width: 520px) {
    .brand__role {
        display: none;
    }

    .section {
        padding: 72px 0;
    }

    .stack {
        padding: 22px;
    }

    .hero__actions .btn,
    .contact__actions .btn {
        flex: 1 1 100%;
    }
}

/* --- Motion preferences --- */

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }

    .js [data-reveal] {
        opacity: 1;
        transform: none;
    }

    .btn:hover,
    .project:hover {
        transform: none;
    }
}