:root {
    --bg: #070b14;
    --panel: rgba(20, 26, 44, 0.5);
    --text: #e7ecff;
    --muted: #a8b0c8;
    --accent: #7c5cff;
    --accent-2: #00d0ff;
    --line: rgba(255, 255, 255, 0.15);
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Manrope", system-ui, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 10% 10%, #121f46, #070b14 45%),
        var(--bg);
    overflow-x: hidden;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: auto;
    width: 36rem;
    height: 36rem;
    filter: blur(80px);
    opacity: 0.35;
    z-index: -1;
    animation: drift 14s ease-in-out infinite;
}

body::before {
    top: -8rem;
    left: -8rem;
    background: var(--accent);
}

body::after {
    right: -9rem;
    bottom: -9rem;
    background: var(--accent-2);
    animation-delay: -6s;
}

@keyframes drift {
    0%,
    100% {
        transform: translate3d(0, 0, 0) scale(1);
    }

    50% {
        transform: translate3d(3rem, -2rem, 0) scale(1.1);
    }
}

/* ==========================================================
   GENERAL GLASS EFFECT
   ========================================================== */

.glass {
    background: var(--panel);
    border: 1px solid var(--line);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
}

.cursor-glow {
    position: fixed;
    width: 20rem;
    height: 20rem;
    border-radius: 50%;
    background:
        radial-gradient(
            circle,
            rgba(124, 92, 255, 0.35),
            transparent 60%
        );
    pointer-events: none;
    z-index: -1;
    transform: translate(-50%, -50%);
    transition:
        left 0.18s ease,
        top 0.18s ease;
}

/* ==========================================================
   HEADER AND NAVIGATION
   ========================================================== */

.site-header {
    position: sticky;
    top: 1rem;
    max-width: 72rem;
    margin: 1rem auto;
    padding: 0.8rem 1.2rem;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: 9;
}

.brand {
    color: var(--text);
    text-decoration: none;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.menu-toggle {
    display: none;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--line);
    border-radius: 0.8rem;
    padding: 0.4rem 0.8rem;
    cursor: pointer;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1rem;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    padding: 0.4rem 0.65rem;
    border-radius: 0.6rem;
    transition:
        background 0.25s ease,
        transform 0.25s ease;
}

.nav-links a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* ==========================================================
   PAGE TRANSITIONS
   ========================================================== */

.page {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
    transition:
        opacity 0.6s ease,
        transform 0.6s ease;
}

.page.active {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* ==========================================================
   SECTIONS AND HERO
   ========================================================== */

.section {
    max-width: 72rem;
    margin: 0 auto;
    padding: 5rem 1.2rem;
}

.hero {
    min-height: calc(100vh - 8rem);
    display: grid;
    align-content: center;
    gap: 1.3rem;
}

.eyebrow {
    text-transform: uppercase;
    color: var(--accent-2);
    letter-spacing: 0.16em;
    font-size: 0.78rem;
}

h1,
h2,
h3,
p {
    margin: 0;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 4.2rem);
    line-height: 1.08;
}

.text-gradient {
    background: linear-gradient(90deg, #9d89ff, #7ef1ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.lead {
    color: var(--muted);
    max-width: 46ch;
    font-size: 1.08rem;
}

/* ==========================================================
   GENERAL BUTTONS
   ========================================================== */

.cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.btn {
    text-decoration: none;
    font-weight: 700;
    padding: 0.85rem 1.15rem;
    border-radius: 0.8rem;
    transition:
        transform 0.25s ease,
        box-shadow 0.25s ease;
}

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

.btn-primary {
    color: white;
    background:
        linear-gradient(
            120deg,
            var(--accent),
            #a886ff
        );
    box-shadow: 0 10px 30px rgba(124, 92, 255, 0.5);
}

.btn-secondary {
    color: var(--text);
    border: 1px solid var(--line);
}

/* ==========================================================
   SECTION HEADINGS
   ========================================================== */

.section-head {
    margin-bottom: 1.2rem;
}

.section-head p,
.about-copy {
    color: var(--muted);
    max-width: 62ch;
}

/* ==========================================================
   PROJECT CAROUSEL
   ========================================================== */

.project-carousel {
    position: relative;
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

/*
The project grid now acts as the horizontal carousel track.
*/

.project-grid {
    display: flex;
    align-items: stretch;
    gap: 1rem;
    width: 100%;
    min-width: 0;

    overflow-x: auto;
    overflow-y: visible;

    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    overscroll-behavior-inline: contain;

    scrollbar-width: none;
    -ms-overflow-style: none;
    -webkit-overflow-scrolling: touch;
}

.project-grid::-webkit-scrollbar {
    display: none;
}

/*
Three cards are displayed at once on desktop.
*/

.project-card {
    flex: 0 0 calc((100% - 2rem) / 3);
    min-width: 0;

    border-radius: 1rem;
    padding: 1.1rem;

    display: flex;
    flex-direction: column;
    gap: 0.9rem;

    scroll-snap-align: start;
    scroll-snap-stop: always;
}

.project-card p {
    color: var(--muted);
}

.project-card span {
    color: #89e9ff;
    font-size: 0.9rem;
}

/* ==========================================================
   PROJECT LINKS
   ========================================================== */

.project-links {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: auto;
    padding-top: 0.4rem;
}

.project-links a {
    display: inline-block;
    color: var(--text);
    text-decoration: none;

    padding: 0.55rem 0.8rem;
    border: 1px solid var(--line);
    border-radius: 0.6rem;

    transition:
        transform 0.25s ease,
        border-color 0.25s ease,
        background 0.25s ease;
}

.project-links a:hover {
    transform: translateY(-2px);
    border-color: var(--accent-2);
    background: rgba(0, 208, 255, 0.08);
}

/* ==========================================================
   CAROUSEL ARROWS
   ========================================================== */

.project-arrow {
    flex: 0 0 auto;

    width: 2.8rem;
    height: 2.8rem;

    display: grid;
    place-items: center;

    padding: 0;
    border-radius: 50%;
    border: 1px solid var(--line);

    background: rgba(20, 26, 44, 0.88);
    color: var(--text);

    font-family: inherit;
    font-size: 1.35rem;
    line-height: 1;

    cursor: pointer;

    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);

    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);

    transition:
        transform 0.2s ease,
        border-color 0.2s ease,
        background 0.2s ease,
        opacity 0.2s ease;
}

.project-arrow:hover {
    transform: scale(1.08);
    border-color: var(--accent-2);
    background: rgba(124, 92, 255, 0.38);
}

.project-arrow:active {
    transform: scale(0.96);
}

.project-arrow:focus-visible {
    outline: 2px solid var(--accent-2);
    outline-offset: 3px;
}

.project-arrow:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    transform: none;
}

/* ==========================================================
   PROJECT CARD FLOATING ANIMATION
   ========================================================== */

.floating {
    animation: bob 5s ease-in-out infinite;
}

.floating:nth-child(2) {
    animation-delay: -1.6s;
}

.floating:nth-child(3) {
    animation-delay: -3.1s;
}

.floating:nth-child(4) {
    animation-delay: -4.2s;
}

@keyframes bob {
    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-6px);
    }
}

/* ==========================================================
   CONTACT SECTION
   ========================================================== */

.contact-panel {
    border-radius: 1rem;
    padding: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.contact-panel a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease;
}

.contact-panel a:hover {
    border-color: currentColor;
}

/* ==========================================================
   FOOTER
   ========================================================== */

.site-footer {
    padding: 2rem 1rem 3rem;
    text-align: center;
    color: var(--muted);
}

/* ==========================================================
   SCROLL REVEAL ANIMATION
   ========================================================== */

.reveal {
    opacity: 0;
    transform: translateY(26px);
    transition:
        opacity 0.6s ease,
        transform 0.6s ease;
}

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

/* ==========================================================
   CARD LINKS
   ========================================================== */

.card-link {
    text-decoration: none;
    color: inherit;
}

.card-link:hover {
    border-color: rgba(126, 241, 255, 0.5);
}

.always-open {
    display: flex;
}

/* ==========================================================
   QUANTUM THEME
   ========================================================== */

.quantum-theme {
    background:
        radial-gradient(
            circle at 8% 10%,
            #1e2e66,
            #070b14 45%
        ),
        var(--bg);
}

.quantum-theme::before {
    background: #7c5cff;
}

.quantum-theme::after {
    background: #6af2ff;
}

.quantum-theme .hero h1::after {
    content: " ⚛";
    color: #7ef1ff;
}

/* ==========================================================
   TABLET LAYOUT
   Two cards visible
   ========================================================== */

@media (max-width: 1000px) and (min-width: 761px) {
    .project-card {
        flex-basis: calc((100% - 1rem) / 2);
    }
}

/* ==========================================================
   MOBILE LAYOUT
   One card visible
   ========================================================== */

@media (max-width: 760px) {
    .site-header {
        border-radius: 1rem;
    }

    .menu-toggle {
        display: inline-block;
    }

    .nav-links {
        position: absolute;
        right: 1rem;
        top: 4rem;

        flex-direction: column;

        width: min(60vw, 13rem);
        padding: 0.8rem;

        border-radius: 0.8rem;
        background: #0f1731;
        border: 1px solid var(--line);

        display: none;
    }

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

    .project-carousel {
        gap: 0.45rem;
    }

    .project-card {
        flex-basis: 100%;
    }

    .project-arrow {
        width: 2.35rem;
        height: 2.35rem;
        font-size: 1.05rem;
    }

    .project-links {
        align-items: flex-start;
    }
}

/* ==========================================================
   VERY SMALL SCREENS
   ========================================================== */

@media (max-width: 460px) {
    .section {
        padding-left: 0.8rem;
        padding-right: 0.8rem;
    }

    .project-carousel {
        position: relative;
        padding-bottom: 3.3rem;
    }

    .project-prev,
    .project-next {
        position: absolute;
        bottom: 0;
        z-index: 2;
    }

    .project-prev {
        left: calc(50% - 3.1rem);
    }

    .project-next {
        right: calc(50% - 3.1rem);
    }

    .project-card {
        padding: 1rem;
    }
}

/* ==========================================================
   REDUCED MOTION ACCESSIBILITY
   ========================================================== */

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

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