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

/* || VARIABLES */
:root {
    /* Color: dark console (default) */
    --BG: #0a0b0d;
    --BG-ELEVATED: #101216;
    --SURFACE: #14161a;
    --SURFACE-HOVER: #191c21;
    --BORDER: #24272d;
    --BORDER-STRONG: #34383f;
    --TEXT-PRIMARY: #edeff2;
    --TEXT-SECONDARY: #9aa3ad;
    --TEXT-MUTED: #6b7178;

    --ACCENT: #6fe7dd;
    --ACCENT-STRONG: #48d8cc;
    --ACCENT-CONTRAST: #0a0b0d;
    --ACCENT-SOFT: rgba(111, 231, 221, 0.12);

    /* Featured section gradient */
    --OPTIPIX-A: #8b5cf6;
    --OPTIPIX-B: #ff7a45;

    /* Font */
    --FONT-DISPLAY: 'Space Grotesk', 'Segoe UI', sans-serif;
    --FONT-BODY: 'Inter', 'Segoe UI', sans-serif;
    --FONT-MONO: 'JetBrains Mono', 'Courier New', monospace;

    /* Layout */
    --CONTAINER: 1200px;
    --RADIUS-S: 6px;
    --RADIUS-M: 12px;
    --RADIUS-L: 20px;
    --HEADER-HEIGHT: 72px;

    /* Motion */
    --EASE: cubic-bezier(0.22, 1, 0.36, 1);
    --DUR-FAST: 150ms;
    --DUR-BASE: 300ms;
    --DUR-SLOW: 600ms;
}

[data-theme='light'] {
    --BG: #fafbfc;
    --BG-ELEVATED: #ffffff;
    --SURFACE: #eaf2f2;
    --SURFACE-HOVER: #ddeaea;
    --BORDER: #cfe0e0;
    --BORDER-STRONG: #a3bcbc;

    --TEXT-PRIMARY: #101216;
    --TEXT-SECONDARY: #4f5963;
    --TEXT-MUTED: #7a858f;

    --ACCENT: #08998f;
    --ACCENT-STRONG: #067f78;
    --ACCENT-CONTRAST: #ffffff;
    --ACCENT-SOFT: rgba(8, 153, 143, 0.12);
}

[data-theme='light'] .project-card,
[data-theme='light'] .skill-card,
[data-theme='light'] .featured,
[data-theme='light'] .contact__link {
    box-shadow: 0 1px 3px rgba(16, 20, 26, 0.06), 0 1px 2px rgba(16, 20, 26, 0.04);
}

[data-theme='light'] .project-card:hover,
[data-theme='light'] .skill-card:hover {
    box-shadow: 0 8px 20px rgba(16, 20, 26, 0.09);
}

/* || BASE STYLES */

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

img,
svg {
    display: block;
    max-width: 100%;
}

ul,
ol {
    list-style: none;
}

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

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

input,
textarea {
    font: inherit;
}

body {
    font-family: var(--FONT-BODY);
    font-size: 16px;
    line-height: 1.6;
    color: var(--TEXT-PRIMARY);
    background: var(--BG);
    transition: background var(--DUR-BASE) var(--EASE), color var(--DUR-BASE) var(--EASE);
}

section {
    padding-block: clamp(4rem, 8vw, 7rem);
    scroll-margin-top: var(--HEADER-HEIGHT);
}

h1,
h2,
h3,
h4 {
    font-family: var(--FONT-DISPLAY);
    line-height: 1.15;
    font-weight: 600;
    letter-spacing: -0.01em;
}

p {
    max-width: 62ch;
    color: var(--TEXT-SECONDARY);
}

::selection {
    color: var(--ACCENT-CONTRAST);
    background: var(--ACCENT);
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
    border-radius: var(--RADIUS-S);
    outline: 2px solid var(--ACCENT);
    outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {

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

/* || UTILITY CLASSES */
.skip-link {
    position: absolute;
    top: -100%;
    left: 1rem;
    z-index: 1000;
    padding: 0.75rem 1.25rem;
    color: var(--ACCENT-CONTRAST);
    font-weight: 600;
    background: var(--ACCENT);
    border-radius: var(--RADIUS-S);
    transition: top var(--DUR-FAST) var(--EASE);
}

.skip-link:focus {
    top: 1rem;
}

.section-inner {
    max-width: var(--CONTAINER);
    margin-inline: auto;
    padding-inline: 1.25rem;
}

.section-eyebrow {
    margin-bottom: 0.75rem;
    font-family: var(--FONT-MONO);
    font-size: 0.8rem;
    color: var(--ACCENT);
    letter-spacing: 0.08em;
}

.section-title {
    margin-bottom: 1.5rem;
    max-width: 20ch;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

/* Scroll-reveal (progressive enhancement; JS toggles .is-visible) */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity var(--DUR-SLOW) var(--EASE), transform var(--DUR-SLOW) var(--EASE);
}

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

.no-js .reveal {
    opacity: 1;
    transform: none;
}

/* || BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.5rem;
    border: 1px solid transparent;
    font-family: var(--FONT-MONO);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    white-space: nowrap;
    border-radius: var(--RADIUS-S);
    transition: transform var(--DUR-FAST) var(--EASE), background var(--DUR-FAST) var(--EASE), border-color var(--DUR-FAST) var(--EASE);
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active,
.filter-bar__btn:active {
    color: var(--ACCENT-CONTRAST);
    background: var(--ACCENT-STRONG);
    border-color: var(--ACCENT-STRONG);
    transform: translateY(0);
}

.btn--primary {
    color: var(--ACCENT-CONTRAST);
    background: var(--ACCENT);
}

.btn--primary:hover {
    background: var(--ACCENT-STRONG);
}

.btn--ghost {
    color: var(--TEXT-PRIMARY);
    border-color: var(--BORDER-STRONG);
}

.btn--ghost:hover {
    color: var(--ACCENT);
    border-color: var(--ACCENT);
}

.btn--ghost:active {
    color: var(--ACCENT);
    background: var(--ACCENT-SOFT);
    border-color: var(--ACCENT);
}

.btn--s {
    padding: 0.6rem 1.1rem;
    font-size: 0.75rem;
}

/* || LOADER */
.loader {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: var(--BG);
    transition: opacity var(--DUR-SLOW) var(--EASE), visibility var(--DUR-SLOW) var(--EASE);
}

.loader.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader__mark {
    font-family: var(--FONT-MONO);
    font-size: 1.5rem;
    color: var(--ACCENT);
    letter-spacing: 0.1em;
}

.loader__bar {
    width: 140px;
    height: 2px;
    overflow: hidden;
    background: var(--BORDER);
    border-radius: 2px;
}

.loader__bar-fill {
    display: block;
    height: 100%;
    width: 40%;
    background: var(--ACCENT);
    animation: loaderSlide 1.1s ease-in-out infinite;
}

@keyframes loaderSlide {
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(350%);
    }
}

/* || SCROLL PROGRESS BAR */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1001;
    width: 100%;
    height: 3px;
    background: transparent;
}

.progress-bar__fill {
    height: 100%;
    width: 0%;
    background: var(--ACCENT);
    transition: width 80ms linear;
}

/* || HEADER / NAVIGATION */
.site-header {
    position: sticky;
    top: 0;
    z-index: 900;
    border-bottom: 1px solid var(--BORDER);
}

.site-header::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    background: rgba(10, 11, 13, 0.72);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

[data-theme='light'] .site-header::before {
    background: rgba(234, 242, 242, 0.85);
}

.nav {
    max-width: var(--CONTAINER);
    margin-inline: auto;
    height: var(--HEADER-HEIGHT);
    padding-inline: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    font-family: var(--FONT-MONO);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.nav__logo-bracket {
    color: var(--ACCENT);
}

.nav__toggle {
    z-index: 950;
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
}

.nav__toggle-bar {
    width: 22px;
    height: 2px;
    background: var(--TEXT-PRIMARY);
    border-radius: 2px;
    transition: transform var(--DUR-FAST) var(--EASE), opacity var(--DUR-FAST) var(--EASE);
}

.nav__toggle[aria-expanded='true'] .nav__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded='true'] .nav__toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav__toggle[aria-expanded='true'] .nav__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.nav__menu {
    position: fixed;
    inset: 0 0 0 30%;
    top: var(--HEADER-HEIGHT);
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding: 2rem 1.5rem;
    border-left: 1px solid var(--BORDER);
    background: var(--BG-ELEVATED);
    transform: translateX(100%);
    transition: transform var(--DUR-BASE) var(--EASE);
}

.nav__menu.is-open {
    transform: translateX(0);
}

.nav__link {
    position: relative;
    display: block;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--BORDER);
    font-family: var(--FONT-MONO);
    font-size: 0.95rem;
    color: var(--TEXT-SECONDARY);
}

.nav__link:hover,
.nav__link.is-active {
    color: var(--TEXT-PRIMARY);
}

.nav__link.is-active::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 50%;
    width: 3px;
    height: 1.1em;
    background: var(--ACCENT);
    border-radius: 999px;
    transform: translateY(-50%);
    transition: background var(--DUR-FAST) var(--EASE);
}

.nav__theme-toggle {
    position: relative;
    margin-top: 1rem;
    width: 44px;
    height: 26px;
    border: 1px solid var(--BORDER-STRONG);
    border-radius: 999px;
}

.nav__theme-icon {
    position: absolute;
    top: 3px;
    left: 4px;
    width: 18px;
    height: 18px;
    background: var(--ACCENT);
    border-radius: 50%;
    transition: transform var(--DUR-BASE) var(--EASE);
}

.nav__theme-toggle[aria-pressed='true'] .nav__theme-icon {
    transform: translateX(18px);
}

@media (min-width: 900px) {
    section {
        padding-block: clamp(2.5rem, 4vw, 4rem);
    }

    .nav__toggle {
        display: none;
    }

    .nav__menu {
        position: static;
        inset: auto;
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 2rem;
        padding: 0;
        border-left: none;
        background: transparent;
        transform: none;
    }

    .nav__link {
        padding: 0.35rem 0;
        border-bottom: none;
    }

    .nav__link.is-active::before {
        left: 0;
        top: auto;
        bottom: -6px;
        width: 100%;
        height: 2px;
        border-radius: 999px;
        transform: none;
    }

    .nav__theme-toggle {
        margin-top: 0;
    }
}

/* || HERO */

.hero {
    position: relative;
    min-height: calc(100svh - var(--HEADER-HEIGHT));
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding-inline: 1.25rem;
    scroll-margin-top: 0;
}

.hero__inner {
    max-width: var(--CONTAINER);
    margin-inline: auto;
    width: 100%;
}

.hero__eyebrow {
    margin-bottom: 1.5rem;
    font-family: var(--FONT-MONO);
    font-size: 0.8rem;
    color: var(--TEXT-MUTED);
    letter-spacing: 0.06em;
}

.hero__state {
    color: var(--ACCENT);
}

.hero__name {
    font-size: clamp(3rem, 12vw, 6.5rem);
    line-height: 1;
}

.hero__role {
    margin-top: 0.75rem;
    font-family: var(--FONT-MONO);
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--TEXT-SECONDARY);
    letter-spacing: 0.02em;
}

.hero__intro {
    margin-top: 1.5rem;
    max-width: 46ch;
    font-size: clamp(1rem, 1.5vw, 1.15rem);
}

.hero__typewriter {
    margin-top: 1.75rem;
    min-height: 1.4em;
    font-family: var(--FONT-MONO);
    font-size: 0.725rem;
    color: var(--ACCENT);
}

@media (min-width: 400px) {
    .hero__typewriter {
        font-size: 0.9rem;
    }
}

.hero__typewriter-prefix {
    margin-right: 0.5em;
    color: var(--TEXT-MUTED);
}

.hero__typewriter-cursor {
    display: inline-block;
    width: 0.55em;
    height: 1em;
    margin-left: 2px;
    vertical-align: text-bottom;
    background: var(--ACCENT);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.hero__actions {
    margin-top: 2.5rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* || ABOUT */
.about {
    min-height: calc(100svh - var(--HEADER-HEIGHT));
}

.about__content {
    display: grid;
    gap: 1.25rem;
    max-width: 68ch;
}

/* || SKILLS */
.skills {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: calc(100svh - var(--HEADER-HEIGHT));
}

.skills__grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
}

.skill-card {
    border: 1px solid var(--BORDER);
    padding: 1rem 1.1rem;
    border-radius: var(--RADIUS-S);
    background: var(--SURFACE);
    transition: border-color var(--DUR-FAST) var(--EASE), transform var(--DUR-FAST) var(--EASE);
}

.skill-card:hover {
    border-color: var(--ACCENT);
    transform: translateY(-3px);
}

.skill-card__label {
    font-family: var(--FONT-MONO);
    font-size: 0.9rem;
}

@media (min-width: 640px) {
    .skills__grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (min-width: 960px) {
    .skills__grid {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }
}

/* || FEATURED PROJECT */
.featured {
    position: relative;
    margin-bottom: 3rem;
    padding: 1.25rem;
    display: grid;
    gap: 2rem;
    border: 1px solid var(--BORDER);
    overflow: hidden;
    border-radius: var(--RADIUS-L);
    background: var(--SURFACE);
}

.featured__glow {
    position: absolute;
    inset: -30%;
    background: radial-gradient(circle at 20% 20%, var(--OPTIPIX-A), transparent 55%),
        radial-gradient(circle at 80% 80%, var(--OPTIPIX-B), transparent 55%);
    opacity: 0.16;
    filter: blur(40px);
    pointer-events: none;
}

.featured__media,
.featured__body {
    position: relative;
}

.featured__media {
    max-width: 640px;
    margin-inline: auto;
}

.featured__screenshot {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--BORDER);
    border-radius: var(--RADIUS-M);
    transition: transform var(--DUR-SLOW) var(--EASE);
}

.featured__media:hover .featured__screenshot {
    transform: scale(1.02);
}

.featured__eyebrow {
    margin-bottom: 0.75rem;
    font-family: var(--FONT-MONO);
    font-size: 0.75rem;
    color: transparent;
    letter-spacing: 0.08em;
    background: linear-gradient(90deg, var(--OPTIPIX-A), var(--OPTIPIX-B));
    -webkit-background-clip: text;
    background-clip: text;
}

.featured__title {
    margin-bottom: 1rem;
    font-size: clamp(1.75rem, 4vw, 2.25rem);
}

.featured__description {
    max-width: 60ch;
    margin-bottom: 1.25rem;
}

.featured__stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.75rem;
}

.featured__stack li {
    padding: 0.4rem 0.75rem;
    border: 1px solid var(--BORDER-STRONG);
    font-family: var(--FONT-MONO);
    font-size: 0.75rem;
    color: var(--TEXT-SECONDARY);
    border-radius: 999px;
}

.featured__actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (min-width: 860px) {
    .featured {
        grid-template-columns: 1.1fr 1fr;
        align-items: center;
        padding: 2rem;
    }

    .featured__media {
        max-width: none;
        margin-inline: 0;
    }
}

/* || PROJECT FILTER BAR */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-bottom: 2.5rem;
}

.filter-bar__btn {
    padding: 0.55rem 1rem;
    border: 1px solid var(--BORDER-STRONG);
    font-family: var(--FONT-MONO);
    font-size: 0.78rem;
    color: var(--TEXT-SECONDARY);
    border-radius: 999px;
    transition: all var(--DUR-FAST) var(--EASE);
}

.filter-bar__btn:hover {
    color: var(--TEXT-PRIMARY);
    border-color: var(--ACCENT);
}

.filter-bar__btn.is-active {
    color: var(--ACCENT-CONTRAST);
    background: var(--ACCENT);
    border-color: var(--ACCENT);
}

/* || PROJECT GRID */
.project-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.75rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--BORDER);
    overflow: hidden;
    border-radius: var(--RADIUS-M);
    background: var(--SURFACE);
    transition: opacity var(--DUR-BASE) var(--EASE), transform var(--DUR-BASE) var(--EASE), border-color var(--DUR-BASE) var(--EASE);
}

.project-card:hover {
    border-color: var(--BORDER-STRONG);
    transform: translateY(-4px);
}

.project-card.is-filtered-out {
    display: none;
}

.project-card__media {
    overflow: hidden;
}

.project-card__screenshot {
    display: block;
    width: 100%;
    height: auto;
    transition: transform var(--DUR-SLOW) var(--EASE);
}

.project-card__media:hover .project-card__screenshot {
    transform: scale(1.05);
}

.project-card__body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    flex: 1;
}

.project-card__title {
    font-size: 1.25rem;
}

.project-card__description {
    min-height: 11.5rem;
    font-size: 0.92rem;
}

.project-card__stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    min-height: 2.5rem;
}

.project-card__stack li {
    font-family: var(--FONT-MONO);
    font-size: 0.7rem;
    color: var(--TEXT-MUTED);
}

.project-card__stack li::after {
    content: '·';
    margin-left: 0.4rem;
    color: var(--BORDER-STRONG);
}

.project-card__stack li:last-child::after {
    content: '';
}

.project-card__badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.project-card__badges li {
    padding: 0.3rem 0.65rem;
    font-size: 0.72rem;
    color: var(--ACCENT);
    background: var(--ACCENT-SOFT);
    border-radius: var(--RADIUS-S);
}

.project-card__actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-top: auto;
}

.project-grid__empty {
    padding: 2rem 0;
    font-family: var(--FONT-MONO);
    text-align: center;
}

@media (min-width: 720px) {
    .project-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 1180px) {
    .project-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

/* || EXPERIENCE TIMELINE */
.timeline {
    display: grid;
    gap: 2.25rem;
    border-left: 1px solid var(--BORDER);
    padding-left: 1.5rem;
    max-width: 68ch;
}

.timeline__item {
    position: relative;
}

.timeline__item::before {
    content: '';
    position: absolute;
    left: -1.6rem;
    top: 0.35rem;
    width: 8px;
    height: 8px;
    background: var(--ACCENT);
    border-radius: 50%;
}

.timeline__marker {
    margin-bottom: 0.4rem;
    font-family: var(--FONT-MONO);
    font-size: 0.72rem;
    color: var(--ACCENT);
    letter-spacing: 0.08em;
}

.timeline__title {
    margin-bottom: 0.5rem;
    font-size: 1.15rem;
}

/* || CONTACT */
.contact {
    min-height: calc(100svh - var(--HEADER-HEIGHT));
}

.contact__text {
    margin-bottom: 1.25rem;
    max-width: 52ch;
}

.contact__list {
    display: grid;
    gap: 0.5rem;
    max-width: 32rem;
}

.contact__link {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
    padding: 1rem 1.25rem;
    border: 1px solid var(--BORDER);
    border-radius: var(--RADIUS-S);
    transition: border-color var(--DUR-FAST) var(--EASE), background var(--DUR-FAST) var(--EASE);
}

.contact__link:hover {
    border-color: var(--ACCENT);
    background: var(--ACCENT-SOFT);
}

.contact__link-label {
    font-family: var(--FONT-MONO);
    font-size: 0.72rem;
    color: var(--TEXT-SECONDARY);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.contact__link-value {
    min-width: 0;
    font-family: var(--FONT-MONO);
    font-size: 0.9rem;
    color: var(--ACCENT);
    overflow-wrap: anywhere;
}

/* || FOOTER */
.site-footer {
    padding: 2rem 1.25rem;
    text-align: center;
}

.site-footer__text {
    font-family: var(--FONT-MONO);
    font-size: 0.78rem;
    color: var(--TEXT-MUTED);
}

/* || BACK TO TOP */
.back-to-top {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    z-index: 800;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--BORDER-STRONG);
    color: var(--TEXT-PRIMARY);
    font-size: 1.1rem;
    border-radius: 50%;
    background: var(--SURFACE);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity var(--DUR-BASE) var(--EASE), transform var(--DUR-BASE) var(--EASE), border-color var(--DUR-FAST) var(--EASE);
}

.back-to-top.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    color: var(--ACCENT);
    border-color: var(--ACCENT);
}