:root {
    /* Engineering Dark Theme (lab / software engineer) */
    --paper: #060713;
    --paper-soft: #0b1026;
    --ink: #f5f6ff;
    --ink-soft: rgba(245, 246, 255, 0.68);
    /* Primary accent for headlines/buttons */
    --burgundy: #56a3ff;
    /* Secondary accent (labels/chips) */
    --gold: #7c66ff;
    /* Borders/outlines */
    --rule: rgba(124, 102, 255, 0.35);
}

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

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(22px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes gentle-shimmer {
    0%,
    100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@keyframes float-grain {
    0% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(-4px, 3px);
    }
    100% {
        transform: translate(2px, -2px);
    }
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Newsreader", "Tajawal", serif;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.6;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.06) 0.4px, transparent 0.4px);
    background-size: 3px 3px;
    pointer-events: none;
    opacity: 0.16;
}

@media (prefers-reduced-motion: no-preference) {
    body::before {
        animation: float-grain 18s ease-in-out infinite alternate;
        will-change: transform;
    }
}

.container {
    width: min(1120px, 92%);
    margin-inline: auto;
}

.masthead {
    border-top: 4px double var(--ink);
    border-bottom: 1px solid var(--rule);
    padding: 0.65rem 0 0.45rem;
    position: sticky;
    top: 0;
    background: color-mix(in srgb, var(--paper) 90%, white 10%);
    backdrop-filter: blur(6px);
    z-index: 50;
    transition: padding 0.28s ease, background 0.28s ease;
}

.masthead-inner {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.masthead-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand-lockup {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: var(--ink);
    min-width: 0;
}

.brand-lockup:hover .brand-name {
    color: var(--burgundy);
}

.brand-mark {
    flex-shrink: 0;
    display: inline-grid;
    place-items: center;
    width: 2.35rem;
    height: 2.35rem;
    border-radius: 50%;
    background: var(--burgundy);
    color: #fff;
    font-family: "Work Sans", sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1;
}

.brand-copy {
    display: flex;
    flex-direction: column;
    gap: 0.08rem;
    min-width: 0;
    text-align: start;
}

.brand-name {
    margin: 0;
    font-family: "Work Sans", "Tajawal", sans-serif;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1.2;
    color: var(--ink);
    transition: color 0.25s ease;
}

.brand-tag {
    font-family: "Work Sans", "Tajawal", sans-serif;
    font-size: 0.68rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-soft);
    line-height: 1.25;
}

.masthead-nav {
    border-top: 1px solid color-mix(in srgb, var(--rule) 45%, transparent);
    padding-top: 0.4rem;
}

.edition,
.eyebrow {
    font-family: "Work Sans", sans-serif;
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--ink-soft);
}

.nav-menu {
    list-style: none;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.65rem 1.1rem;
    padding: 0 0 0.15rem;
    transition: padding 0.28s ease, gap 0.28s ease;
}

.masthead.scrolled {
    padding: 0.4rem 0 0.3rem;
}

.masthead.scrolled .masthead-nav {
    padding-top: 0.3rem;
}

.masthead.scrolled .brand-mark {
    width: 2rem;
    height: 2rem;
    font-size: 0.82rem;
}

.masthead.scrolled .brand-name {
    font-size: 0.95rem;
}

.masthead.scrolled .brand-tag {
    font-size: 0.62rem;
}

.masthead.scrolled .nav-menu {
    gap: 0.5rem 0.95rem;
    padding-bottom: 0;
}

.nav-menu a {
    position: relative;
    text-decoration: none;
    color: var(--ink-soft);
    font-family: "Work Sans", sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.68rem;
    transition: color 0.35s ease, transform 0.35s ease;
}

.nav-menu a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -3px;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--burgundy),
        transparent
    );
    transform: scaleX(0);
    transform-origin: inline-start;
    transition: transform 0.35s ease, opacity 0.35s ease;
    opacity: 0;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--burgundy);
    transform: translateY(-2px);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    transform: scaleX(1);
    opacity: 0.95;
}

@media (prefers-reduced-motion: no-preference) {
    .brand-lockup {
        animation: fade-up 0.65s cubic-bezier(0.22, 1, 0.36, 1) 0.06s forwards;
        opacity: 0;
    }

    .nav-menu li {
        animation: fade-up 0.55s cubic-bezier(0.22, 1, 0.36, 1) forwards;
        opacity: 0;
    }

    .nav-menu li:nth-child(1) {
        animation-delay: 0.14s;
    }

    .nav-menu li:nth-child(2) {
        animation-delay: 0.2s;
    }

    .nav-menu li:nth-child(3) {
        animation-delay: 0.26s;
    }

    .nav-menu li:nth-child(4) {
        animation-delay: 0.32s;
    }

    .nav-menu li:nth-child(5) {
        animation-delay: 0.38s;
    }

    .nav-menu li:nth-child(6) {
        animation-delay: 0.44s;
    }

    .nav-menu li:nth-child(7) {
        animation-delay: 0.5s;
    }
}

.language-switcher {
    display: flex;
    gap: 0.3rem;
}

.lang-btn {
    border: 1px solid var(--rule);
    background: transparent;
    color: var(--ink);
    padding: 0.2rem 0.55rem;
    font-size: 0.68rem;
    font-family: "Work Sans", sans-serif;
    cursor: pointer;
    transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease,
        box-shadow 0.25s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .lang-btn:hover {
        transform: translateY(-1px);
        box-shadow: 0 6px 16px rgba(34, 25, 26, 0.12);
    }
}

.lang-btn.active {
    background: var(--burgundy);
    color: #fff;
    border-color: var(--burgundy);
}

.nav-toggle span {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .nav-toggle:hover span:first-child {
        transform: translateY(2px);
    }

    .nav-toggle:hover span:last-child {
        transform: translateY(-2px);
    }
}

.nav-toggle {
    display: none;
}

.section {
    padding: 4.5rem 0 3.8rem;
}

.with-rule {
    border-top: 1px solid var(--rule);
}

.tinted {
    background: color-mix(in srgb, var(--paper-soft) 85%, white 15%);
    border-top: 1px solid color-mix(in srgb, var(--rule) 45%, transparent);
    border-bottom: 1px solid color-mix(in srgb, var(--rule) 45%, transparent);
    padding-inline: 1rem;
}

.section-title {
    font-size: clamp(1.8rem, 4.4vw, 2.8rem);
    color: var(--burgundy);
    margin-bottom: 1.1rem;
}

.hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.6rem;
    align-items: center;
}

.hero-title {
    font-size: clamp(2.1rem, 5.5vw, 4rem);
    line-height: 1.1;
    margin: 0.4rem 0 0.9rem;
    color: var(--burgundy);
}

.hero-description {
    color: var(--ink-soft);
    max-width: 60ch;
}

@media (prefers-reduced-motion: no-preference) {
    .hero-main .eyebrow,
    .hero-main .hero-title,
    .hero-main .hero-description,
    .hero-main .hero-actions {
        animation: fade-up 0.75s cubic-bezier(0.22, 1, 0.36, 1) forwards;
        opacity: 0;
    }

    .hero-main .eyebrow {
        animation-delay: 0.08s;
    }

    .hero-main .hero-title {
        animation-delay: 0.16s;
    }

    .hero-main .hero-description {
        animation-delay: 0.26s;
    }

    .hero-main .hero-actions {
        animation-delay: 0.36s;
    }
}

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

@media (prefers-reduced-motion: no-preference) {
    .reveal-section {
        opacity: 0;
        transform: translateY(36px);
        transition: opacity 0.72s cubic-bezier(0.22, 1, 0.36, 1),
            transform 0.72s cubic-bezier(0.22, 1, 0.36, 1);
    }

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

    .reveal-section .reveal-stagger > * {
        opacity: 0;
        transform: translateY(18px);
        transition: opacity 0.62s cubic-bezier(0.22, 1, 0.36, 1),
            transform 0.62s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .reveal-section.is-visible .reveal-stagger > * {
        opacity: 1;
        transform: translateY(0);
    }

    .reveal-section.is-visible .reveal-stagger > *:nth-child(1) {
        transition-delay: 0.05s;
    }

    .reveal-section.is-visible .reveal-stagger > *:nth-child(2) {
        transition-delay: 0.12s;
    }

    .reveal-section.is-visible .reveal-stagger > *:nth-child(3) {
        transition-delay: 0.18s;
    }

    .reveal-section.is-visible .reveal-stagger > *:nth-child(4) {
        transition-delay: 0.24s;
    }

    .reveal-section.is-visible .reveal-stagger > *:nth-child(5) {
        transition-delay: 0.31s;
    }

    .reveal-section.is-visible .reveal-stagger > *:nth-child(6) {
        transition-delay: 0.38s;
    }

    .reveal-section.is-visible .reveal-stagger > *:nth-child(7) {
        transition-delay: 0.44s;
    }

    .reveal-section.is-visible .reveal-stagger > *:nth-child(8) {
        transition-delay: 0.5s;
    }
}

.hero-actions {
    margin-top: 1.2rem;
    display: flex;
    gap: 0.7rem;
    flex-wrap: wrap;
}

.btn {
    text-decoration: none;
    border: 1px solid var(--ink);
    padding: 0.62rem 1rem;
    font-size: 0.66rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-family: "Work Sans", sans-serif;
    transition: background 0.28s ease, color 0.28s ease, box-shadow 0.28s ease,
        transform 0.28s ease;
    cursor: pointer;
}

@media (prefers-reduced-motion: no-preference) {
    .btn:hover {
        transform: translateY(-2px);
    }
}

.btn-primary {
    background: var(--burgundy);
    border-color: var(--burgundy);
    color: #fff;
}

.btn-primary:hover {
    background: color-mix(in srgb, var(--burgundy) 85%, black 15%);
    box-shadow: 0 0 12px color-mix(in srgb, var(--burgundy) 30%, transparent);
}

.btn-outline {
    background: transparent;
    color: var(--ink);
}

.btn-outline:hover {
    background: var(--ink);
    color: var(--paper);
}

.about-grid {
    display: grid;
    grid-template-columns: 0.8fr 2.2fr;
    gap: 2rem;
}

.about-side {
    border-right: 1px solid color-mix(in srgb, var(--rule) 40%, transparent);
    padding-right: 1rem;
}

.about-side h3 {
    color: var(--burgundy);
    font-size: 1.45rem;
}

.about-side p {
    font-family: "Work Sans", sans-serif;
    font-size: 0.82rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-soft);
}

.lead-copy {
    font-size: 1.15rem;
    margin-bottom: 0.7rem;
}

.timeline {
    border-left: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
    padding-left: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
    max-width: 720px;
}

body.rtl .timeline {
    border-left: none;
    border-right: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
    padding-left: 0;
    padding-right: 1.5rem;
}

.titem {
    position: relative;
}

.titem::before {
    content: "";
    position: absolute;
    left: -1.75rem;
    top: 0.4rem;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--burgundy);
    border: 2px solid var(--paper);
    outline: 1px solid var(--burgundy);
}

body.rtl .titem::before {
    left: auto;
    right: -1.75rem;
}

.titem .when {
    font-family: "Work Sans", sans-serif;
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 0.25rem;
}

.titem h3 {
    color: var(--burgundy);
    font-size: 1.15rem;
    margin-bottom: 0.15rem;
}

.titem .org {
    font-size: 0.92rem;
    color: var(--ink-soft);
}

.titem .desc {
    margin-top: 0.4rem;
    font-size: 0.95rem;
    color: var(--ink-soft);
    max-width: 560px;
}

.project-card .chips {
    margin: 0 0 0.75rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.skill-card {
    border: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
    padding: 1rem;
    background: rgba(0, 0, 0, 0.18);
    transition: border-color 0.35s ease, background 0.35s ease,
        transform 0.35s ease, box-shadow 0.35s ease;
    cursor: pointer;
}

.skill-card:hover,
.skill-card.active,
.skill-card:focus-visible {
    border-color: var(--burgundy);
    background: rgba(86, 163, 255, 0.08);
    outline: none;
}

@media (prefers-reduced-motion: no-preference) {
    .skill-card:hover,
    .skill-card.active,
    .skill-card:focus-visible {
        transform: translateY(-4px);
        box-shadow: 0 12px 28px rgba(34, 25, 26, 0.12);
    }
}

.skill-card h3 {
    color: var(--burgundy);
    margin-bottom: 0.4rem;
}

.skill-summary {
    color: var(--ink-soft);
    font-size: 0.95rem;
}

.skill-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}

.skill-card.active .skill-details,
.skill-card:hover .skill-details,
.skill-card:focus-visible .skill-details {
    max-height: 200px;
    margin-top: 0.6rem;
}

.chips {
    display: block;
    margin-top: 0.4rem;
    font-family: "Work Sans", sans-serif;
    font-size: 0.74rem;
    color: var(--gold);
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.9rem;
}

.process-grid article {
    border-top: 1px solid var(--rule);
    padding-top: 0.8rem;
    transition: border-color 0.35s ease, transform 0.35s ease;
}

@media (prefers-reduced-motion: no-preference) {
    .process-grid article:hover {
        transform: translateY(-3px);
        border-top-color: var(--burgundy);
    }

    .process-grid article:hover span {
        transform: scale(1.08);
    }
}

.process-grid span {
    display: inline-grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--burgundy);
    color: #fff;
    font-size: 0.72rem;
    font-family: "Work Sans", sans-serif;
    transition: transform 0.35s ease;
}

.process-grid h3 {
    color: var(--burgundy);
    margin: 0.55rem 0 0.2rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.project-card {
    border: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
    padding: 0.7rem;
    background: rgba(255, 255, 255, 0.06);
    transition: transform 0.42s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.42s ease, border-color 0.35s ease;
    overflow: hidden;
}

@media (prefers-reduced-motion: no-preference) {
    .project-card:hover {
        transform: translateY(-6px);
        box-shadow: 0 18px 40px rgba(34, 25, 26, 0.14);
        border-color: color-mix(in srgb, var(--burgundy) 35%, var(--rule));
    }
}

.project-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border: 1px solid color-mix(in srgb, var(--rule) 40%, transparent);
    filter: none;
    transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-reduced-motion: no-preference) {
    .project-card:hover .project-img {
        transform: scale(1.05);
    }
}

.project-card h3 {
    margin: 0.65rem 0 0.2rem;
    color: var(--burgundy);
}

.project-card p {
    color: var(--ink-soft);
    margin-bottom: 0.7rem;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
}

.clip-card {
    display: flex;
    flex-direction: column;
    border: 1px dashed color-mix(in srgb, var(--rule) 55%, transparent);
    background: rgba(255, 255, 255, 0.06);
    padding: 0.85rem;
    position: relative;
    overflow: hidden;
    transition: transform 0.35s ease, border-color 0.35s ease,
        box-shadow 0.35s ease;
}

.clip-card-body {
    position: relative;
    flex: 1 1 auto;
    min-height: 4.75rem;
    overflow: hidden;
    margin-bottom: 0.55rem;
}

@media (prefers-reduced-motion: no-preference) {
    .clip-card:hover {
        transform: translateY(-4px);
        border-color: color-mix(in srgb, var(--burgundy) 40%, transparent);
        box-shadow: 0 14px 32px rgba(34, 25, 26, 0.11);
    }
}

.clip-card-body p {
    font-family: "Work Sans", sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.6rem;
    color: var(--ink-soft);
}

.clip-card-body h3 {
    margin: 0.4rem 0 0;
    color: var(--burgundy);
    font-size: 1.1rem;
}

.clip-card-link {
    flex-shrink: 0;
    align-self: flex-start;
    font-family: "Work Sans", sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.62rem;
    color: var(--ink);
    text-decoration: none;
    padding-block: 0.15rem;
    border-bottom: 1px solid transparent;
    transition: color 0.25s ease, border-color 0.25s ease;
}

.clip-card-link:hover {
    color: var(--burgundy);
    border-bottom-color: color-mix(in srgb, var(--burgundy) 55%, transparent);
}

.clip-hover {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    background: color-mix(in srgb, var(--burgundy) 92%, transparent);
    color: #fff;
    padding: 0.6rem;
    font-size: 0.83rem;
    line-height: 1.35;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    pointer-events: none;
}

.clip-card:hover .clip-hover {
    transform: translateY(0);
}

.quote-band {
    border-top: 3px double var(--rule);
    border-bottom: 1px solid var(--rule);
    padding: 2rem 1rem;
    text-align: center;
    margin-top: 1rem;
}

.quote-band blockquote {
    font-size: clamp(1.4rem, 3.6vw, 2.2rem);
    color: var(--burgundy);
    font-style: italic;
    background: linear-gradient(
        100deg,
        var(--burgundy),
        color-mix(in srgb, var(--burgundy) 55%, var(--gold)),
        var(--burgundy)
    );
    background-size: 220% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

@media (prefers-reduced-motion: no-preference) {
    .quote-band.is-visible blockquote {
        animation: gentle-shimmer 9s ease-in-out infinite alternate;
    }
}

@media (prefers-reduced-motion: reduce) {
    .quote-band blockquote {
        background: none;
        background-clip: border-box;
        -webkit-background-clip: unset;
        color: var(--burgundy);
        animation: none;
    }
}

.contact-section {
    text-align: center;
}

.contact-section p {
    color: var(--ink-soft);
    max-width: 55ch;
    margin: 0 auto 1rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 0.7rem;
    flex-wrap: wrap;
}

.footer {
    border-top: 1px solid var(--rule);
    padding: 1.1rem 0;
    text-align: center;
    color: var(--ink-soft);
    font-family: "Work Sans", sans-serif;
    font-size: 0.75rem;
}

.modal {
    width: min(700px, 90vw);
    border: 1px solid var(--rule);
    background: color-mix(in srgb, var(--paper) 82%, white 18%);
    padding: 1.2rem;
}

.modal::backdrop {
    background: rgba(60, 25, 32, 0.45);
    backdrop-filter: blur(4px);
}

.modal h3 {
    color: var(--burgundy);
    margin-bottom: 0.8rem;
}

.modal-close {
    position: absolute;
    right: 0.7rem;
    top: 0.45rem;
    border: none;
    background: transparent;
    font-size: 1.7rem;
    color: var(--ink);
    cursor: pointer;
}

.modal-block {
    margin-top: 0.6rem;
    border-top: 1px solid color-mix(in srgb, var(--rule) 42%, transparent);
    padding-top: 0.55rem;
}

.label {
    font-family: "Work Sans", sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.67rem;
    color: var(--gold);
}

@media (max-width: 950px) {
    .hero,
    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-side {
        border-right: none;
        border-bottom: 1px solid color-mix(in srgb, var(--rule) 40%, transparent);
        padding-right: 0;
        padding-bottom: 0.7rem;
    }

    .skills-grid,
    .process-grid,
    .certificates-grid,
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 760px) {
    .nav-toggle {
        display: flex;
        flex-direction: column;
        gap: 3px;
        border: none;
        background: transparent;
    }

    .nav-toggle span {
        width: 20px;
        height: 2px;
        background: var(--ink);
    }

    .nav-menu {
        display: none;
        border-top: 1px solid var(--rule);
        padding-top: 0.6rem;
    }

    .nav-menu.active {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 600px) {
    .skills-grid,
    .process-grid,
    .certificates-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
}