/* ============================================
   JJ's Stuff – Design System & Styles
   ============================================ */

/* --- Self-hosted Fonts --- */
@font-face {
    font-family: 'Inter';
    src: url('../assets/fonts/inter-variable.woff2') format('woff2');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'JetBrains Mono';
    src: url('../assets/fonts/JetBrainsMono-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'JetBrains Mono';
    src: url('../assets/fonts/JetBrainsMono-Medium.woff2') format('woff2');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'JetBrains Mono';
    src: url('../assets/fonts/JetBrainsMono-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}
/* --- Design Tokens --- */
:root {
    /* Colors */
    --c-bg:          #050508;
    --c-bg-alt:      #0a0a10;
    --c-surface:     #111118;
    --c-surface-alt: #191920;
    --c-border:      rgba(255, 255, 255, 0.08);
    --c-border-hover:rgba(255, 255, 255, 0.15);
    --c-text:        #fafafa;
    --c-text-muted:  rgba(255, 255, 255, 0.5);
    --c-text-secondary: rgba(255, 255, 255, 0.7);
    --c-text-soft:   rgba(255, 255, 255, 0.8);
    --c-text-dim:    rgba(255, 255, 255, 0.25);
    --c-accent:      #06b6d4;
    --c-accent-2:    #8b5cf6;
    --c-accent-3:    #6366f1;
    --c-accent-glow: rgba(6, 182, 212, 0.15);
    --c-gradient:    linear-gradient(135deg, #06b6d4, #8b5cf6);

    /* Typography */
    --f-mono:  'JetBrains Mono', 'Fira Code', monospace;
    --f-sans:  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --f-size:  16px;

    /* Spacing */
    --s-xs:  0.25rem;
    --s-sm:  0.5rem;
    --s-md:  1rem;
    --s-lg:  1.5rem;
    --s-xl:  2rem;
    --s-2xl: 3rem;
    --s-3xl: 4rem;
    --s-4xl: 6rem;

    /* Misc */
    --radius:     8px;
    --radius-lg:  16px;
    --radius-pill: 100px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width:  900px;
}

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--f-size);
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
}

body {
    font-family: var(--f-sans);
    background: var(--c-bg);
    color: var(--c-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: var(--c-accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--c-text);
}

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

/* --- Skip Link --- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--c-accent);
    color: var(--c-bg);
    padding: var(--s-sm) var(--s-lg);
    border-radius: var(--radius-pill);
    font-family: var(--f-sans);
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 200;
    transition: top var(--transition);
}

.skip-link:focus {
    top: var(--s-md);
}

/* --- Focus Styles --- */
:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(5, 5, 8, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--c-border);
    transition: background var(--transition);
}

.nav__container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--s-md) var(--s-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    font-family: var(--f-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--c-text);
    letter-spacing: -0.02em;
}

.nav__logo:hover {
    color: var(--c-text);
}

.nav__logo-bracket {
    color: var(--c-accent);
    font-weight: 400;
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--s-xl);
    align-items: center;
}

.nav__link {
    font-family: var(--f-mono);
    font-size: 0.85rem;
    color: var(--c-text-muted);
    letter-spacing: 0.02em;
    position: relative;
    padding: var(--s-xs) 0;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--c-gradient);
    transition: width var(--transition);
}

.nav__link:hover,
.nav__link.active {
    color: var(--c-text);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__lang {
    border: 1px solid var(--c-border);
    padding: var(--s-xs) var(--s-sm);
    border-radius: var(--radius);
    font-size: 0.75rem;
    font-weight: 500;
}

.nav__lang::after {
    display: none;
}

.nav__lang:hover {
    border-color: var(--c-accent);
    color: var(--c-accent);
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--s-xs);
}

.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--c-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* --- Global Mesh Background --- */
.mesh {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.mesh__blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    animation: drift 10s ease-in-out infinite;
}

.mesh__blob--1 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    top: -15%;
    right: 5%;
    opacity: 0.35;
}

.mesh__blob--2 {
    width: 450px;
    height: 450px;
    background: linear-gradient(135deg, #06b6d4, #22d3ee);
    bottom: -10%;
    left: 0%;
    opacity: 0.25;
    animation-delay: -4s;
}

.mesh__blob--3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #a855f7, #ec4899);
    top: 50%;
    left: 45%;
    opacity: 0.15;
    animation-delay: -7s;
}

@keyframes drift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33%      { transform: translate(25px, -20px) scale(1.03); }
    66%      { transform: translate(-15px, 15px) scale(0.97); }
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--s-4xl) var(--s-lg);
    position: relative;
    z-index: 1;
}

.hero__container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--s-xl);
    position: relative;
    z-index: 1;
}

.hero__pre {
    font-family: var(--f-mono);
    font-size: 0.8rem;
    color: var(--c-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.3em;
}

.hero__title {
    font-size: clamp(4rem, 11vw, 9rem);
    font-weight: 900;
    line-height: 0.9;
    letter-spacing: -0.04em;
}

.hero__title-accent {
    background: var(--c-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.3rem);
    font-weight: 300;
    color: var(--c-text-muted);
    max-width: 460px;
    line-height: 1.7;
}

.hero__cta-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn {
    font-family: var(--f-sans);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 14px 36px;
    border-radius: var(--radius-pill);
    text-decoration: none;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--s-sm);
}

.btn--primary {
    background: #fff;
    color: var(--c-bg);
}

.btn--primary:hover {
    color: var(--c-bg);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(255, 255, 255, 0.15);
}

.btn--ghost {
    background: rgba(255, 255, 255, 0.06);
    color: var(--c-text-secondary);
    border: 1px solid var(--c-border);
}

.btn--ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--c-text);
    border-color: var(--c-border-hover);
}

/* --- Sections --- */
.section {
    padding: var(--s-4xl) var(--s-lg);
    position: relative;
    z-index: 1;
}

.section__container {
    max-width: var(--max-width);
    margin: 0 auto;
}

.section__title {
    font-family: var(--f-sans);
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 700;
    margin-bottom: var(--s-2xl);
    color: var(--c-text);
}

.section__title-tag {
    background: var(--c-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 400;
}

/* --- Apps --- */
.apps__grid {
    display: grid;
    gap: var(--s-lg);
}

.app-card {
    display: flex;
    gap: var(--s-lg);
    padding: var(--s-xl);
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.app-card:hover {
    border-color: var(--c-border-hover);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    transform: translateY(-2px);
}

.app-card--coming {
    opacity: 0.5;
    border-style: dashed;
}

.app-card--coming:hover {
    opacity: 0.7;
    transform: none;
}

.app-card__icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--c-surface-alt);
    border-radius: var(--radius);
    border: 1px solid var(--c-border);
}

.app-card__icon-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius);
}

.app-card__title {
    font-family: var(--f-sans);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--s-sm);
}

.app-card__desc {
    font-size: 0.95rem;
    color: var(--c-text-muted);
    line-height: 1.6;
    margin-bottom: var(--s-md);
}

.app-card__tags {
    display: flex;
    gap: var(--s-sm);
    margin-bottom: var(--s-md);
    flex-wrap: wrap;
}

.app-card__tag {
    font-family: var(--f-mono);
    font-size: 0.7rem;
    color: var(--c-accent);
    background: var(--c-accent-glow);
    padding: 2px 10px;
    border-radius: var(--radius-pill);
    letter-spacing: 0.03em;
    text-transform: lowercase;
}

.app-card__link {
    display: inline-flex;
    align-items: center;
    gap: var(--s-xs);
    font-family: var(--f-mono);
    font-size: 0.85rem;
    color: var(--c-accent);
    transition: color var(--transition);
    margin-top: var(--s-xs);
}

.app-card__link:hover {
    color: var(--c-text);
}

/* Spacing between multiple app links: horizontal on wide screens, vertical on stacked/mobile */
.app-card__link + .app-card__link {
    margin-left: var(--s-md);
    margin-top: var(--s-xs);
}

/* --- About --- */
.about__content {
    display: grid;
    gap: var(--s-2xl);
}

.about__text p {
    margin-bottom: var(--s-md);
    color: var(--c-text-muted);
    font-size: 1.05rem;
}

.about__text strong {
    color: var(--c-text);
}

.about__stack-title {
    font-family: var(--f-mono);
    font-size: 0.85rem;
    color: var(--c-text-dim);
    margin-bottom: var(--s-md);
    font-weight: 400;
}

.about__stack-items {
    display: flex;
    gap: var(--s-sm);
    flex-wrap: wrap;
}

.about__stack-item {
    font-family: var(--f-mono);
    font-size: 0.8rem;
    padding: var(--s-xs) var(--s-md);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-pill);
    color: var(--c-text-muted);
    transition: all var(--transition);
}

.about__stack-item:hover {
    border-color: var(--c-accent);
    color: var(--c-accent);
    background: var(--c-accent-glow);
}

/* --- Contact --- */
.contact__content {
    text-align: center;
    padding: var(--s-2xl) 0;
}

.contact__text {
    font-size: 1.1rem;
    color: var(--c-text-muted);
    margin-bottom: var(--s-xl);
}

.contact__email {
    display: inline-flex;
    align-items: center;
    gap: var(--s-sm);
    font-family: var(--f-mono);
    font-size: 1rem;
    color: var(--c-text);
    border: 1px solid var(--c-border);
    padding: var(--s-md) var(--s-xl);
    border-radius: var(--radius-pill);
    transition: all var(--transition);
    background: rgba(255, 255, 255, 0.03);
}

.contact__email:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--c-border-hover);
    color: var(--c-text);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

/* --- Footer --- */
.footer {
    padding: var(--s-xl) var(--s-lg);
    border-top: 1px solid var(--c-border);
    position: relative;
    z-index: 1;
}

.footer__container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer__links {
    display: flex;
    gap: var(--s-sm);
    align-items: center;
}

.footer__links a {
    font-size: 0.85rem;
    color: var(--c-text-muted);
}

.footer__links a:hover {
    color: var(--c-text);
}

.footer__sep {
    color: var(--c-text-dim);
    font-size: 0.8rem;
}

.footer__copy {
    font-size: 0.8rem;
    color: var(--c-text-dim);
}

/* --- Legal Pages --- */
.legal {
    padding-top: 8rem;
}

.legal__content {
    max-width: 700px;
    margin: 0 auto;
}

.legal__content h2 {
    font-family: var(--f-sans);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--c-text);
    margin-top: var(--s-xl);
    margin-bottom: var(--s-sm);
}

.legal__content h3 {
    font-family: var(--f-sans);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--c-text-secondary);
    margin-top: var(--s-lg);
    margin-bottom: var(--s-sm);
}

.legal__content p {
    color: var(--c-text-soft);
    font-size: 0.95rem;
    margin-bottom: var(--s-md);
    line-height: 1.8;
}

.legal__content ul,
.legal__content ol {
    padding-left: var(--s-xl);
}

.legal__content ul,
.legal__content ol,
.legal__content li {
    color: var(--c-text-soft);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* --- Fade-in Animation --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }

    .nav__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--c-surface);
        flex-direction: column;
        justify-content: center;
        gap: var(--s-xl);
        padding: var(--s-xl);
        border-left: 1px solid var(--c-border);
        transition: right var(--transition);
        z-index: 200;
    }

    .nav__menu.open {
        right: 0;
    }

    .nav__link {
        font-size: 1rem;
    }

    .app-card {
        flex-direction: column;
    }

    /* When stacked on small screens, use vertical spacing between links */
    .app-card__link + .app-card__link {
        margin-left: 0;
        margin-top: var(--s-md);
    }

    .hero__title {
        font-size: clamp(2.5rem, 12vw, 5rem);
    }

    .mesh__blob--1 { width: 300px; height: 300px; }
    .mesh__blob--2 { width: 250px; height: 250px; }
    .mesh__blob--3 { width: 180px; height: 180px; }

    .footer__container {
        flex-direction: column;
        gap: var(--s-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        --f-size: 15px;
    }

    .hero {
        padding: var(--s-3xl) var(--s-md);
    }

    .section {
        padding: var(--s-3xl) var(--s-md);
    }

    .app-card {
        padding: var(--s-lg);
    }

    .hero__title {
        font-size: clamp(2rem, 14vw, 4rem);
    }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    .mesh__blob {
        animation: none;
    }

    .fade-in {
        opacity: 1;
        transform: none;
        transition: none;
    }

    html {
        scroll-behavior: auto;
    }
}