/* Global dark theme variables */
:root {
    --color-bg: #0d0f12;
    --color-bg-alt: #161a20;
    --color-surface: #1f242b;
    --color-border: #2c333b;
    --color-accent: #ff8a00;
    /* switched to orange accent */
    --color-accent-glow: 28 100% 55%;
    --color-text: #d5d9df;
    --color-text-dim: #8a939e;
    --color-danger: #ff4d4d;
    --radius-xs: 3px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 18px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 14px -2px rgba(0, 0, 0, 0.55);
    --shadow-lg: 0 8px 32px -4px rgba(0, 0, 0, 0.6);
    --transition-fast: 120ms cubic-bezier(.4, 0, .2, 1);
    --transition-slow: 260ms cubic-bezier(.4, 0, .2, 1);
    --grid-max: 1200px;
    --nav-height: 64px;
    --font-stack: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', Arial, sans-serif;
    --mono-stack: 'JetBrains Mono', 'Source Code Pro', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: var(--font-stack);
    background: radial-gradient(ellipse at top, #0f1419 0%, #0a0c0f 50%, #050708 100%);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    line-height: 1.45;
}

body.theme-light {
    --color-bg: #f5f7fa;
    --color-bg-alt: #e5ebf2;
    --color-surface: #ffffff;
    --color-border: #d7dde4;
    --color-accent: #ff8a00;
    /* light theme accent also orange */
    --color-text: #1f242b;
    --color-text-dim: #5b6673;
    background: radial-gradient(circle at 25% 15%, #ffffff, #e5edf4 70%);
}

/* Layout */
.wrapper {
    width: 100%;
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

.container {
    width: 100%;
    max-width: var(--grid-max);
    margin-inline: auto;
    padding: 0 2rem;
}

/* Navigation */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(10px);
    background: rgba(13, 15, 18, 0.72);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    height: var(--nav-height);
}

body.theme-light .site-nav {
    background: rgba(255, 255, 255, 0.75);
}

.nav-inner {
    width: 100%;
    max-width: var(--grid-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.brand {
    font-weight: 600;
    letter-spacing: .5px;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: .6rem;
}

.brand-badge {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(145deg, #1d2730, #101a24);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05), 0 3px 8px -2px rgba(0, 0, 0, .6);
    display: grid;
    place-items: center;
    font-size: .8rem;
    font-weight: 500;
    color: var(--color-text-dim);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.2rem;
    margin: 0;
    padding: 0;
}

.nav-links a {
    position: relative;
    text-decoration: none;
    color: var(--color-text-dim);
    font-size: .9rem;
    letter-spacing: .3px;
    padding: .4rem .55rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-links a:hover,
.nav-links a:focus-visible {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.04);
}

.nav-links a.active {
    color: var(--color-accent);
}

.toggle-theme-btn {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-dim);
    font-size: .75rem;
    padding: .45rem .75rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    line-height: 1;
    transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.toggle-theme-btn:hover {
    background: var(--color-surface);
    color: var(--color-text);
}

body.theme-light .toggle-theme-btn:hover {
    background: #f0f4f8;
}

/* Hero */
.hero {
    position: relative;
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    align-items: center;
    padding: 6rem 0 4rem;
}

.hero-grid {
    display: grid;
    gap: 3.5rem;
    width: 100%;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(2.6rem, 5vw, 3.7rem);
    line-height: 1.08;
    margin: 0 0 1.1rem;
    letter-spacing: .5px;
    /* warmer heading gradient: remove cool blue and blend to accent */
    background: linear-gradient(120deg, #fbf6f2 0%, #ecd6bd 38%, var(--color-accent) 78%);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
}

.hero-text p {
    font-size: 1.05rem;
    max-width: 680px;
    color: var(--color-text-dim);
    margin: 0 0 1.8rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .9rem;
}


.btn {
    /* neutral, uncolored default: transparent/neutral surface */
    --btn-bg: transparent;
    --btn-color: var(--color-text);
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    border: 1px solid var(--color-border);
    background: var(--btn-bg);
    color: var(--btn-color);
    padding: .85rem 1.1rem;
    font-size: .85rem;
    line-height: 1;
    font-weight: 500;
    letter-spacing: .5px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
}

.btn:hover {
    transform: translateY(-2px);
    /* subtle dark hover like Labs/Experiments button */
    background: linear-gradient(145deg, rgba(35, 40, 45, 0.95), rgba(20, 24, 28, 0.95));
}

.btn-primary,
.btn-outline {
    /* inherit the neutral button style; no colored primary buttons */
    --btn-bg: transparent;
    border: 1px solid var(--color-border);
    color: var(--btn-color);
    background: var(--btn-bg);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover,
.btn-outline:hover {
    transform: translateY(-2px);
    background: linear-gradient(145deg, rgba(35, 40, 45, 0.95), rgba(20, 24, 28, 0.95));
}

/* Project cards */
.section {
    padding: 4.5rem 0 5rem;
    position: relative;
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: .9rem;
    margin: 0 0 2.2rem;
}

.section-header h2 {
    font-size: 1.4rem;
    margin: 0;
    letter-spacing: .6px;
    font-weight: 600;
}

.section-header .sub {
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: 1.7px;
    color: var(--color-text-dim);
}

.grid {
    display: grid;
    gap: 1.6rem;
}

.grid.projects {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.card {
    position: relative;
    background: linear-gradient(145deg, #1b2127, #14191e);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.15rem 1.15rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: .85rem;
    overflow: hidden;
    min-height: 180px;
    box-shadow: var(--shadow-md);
    transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    transform: translateY(-4px);
    border-color: #3b4a56;
    box-shadow: var(--shadow-lg);
}

.card h3 {
    font-size: 1rem;
    margin: 0;
    letter-spacing: .4px;
    font-weight: 600;
}

.card p {
    margin: 0;
    font-size: .75rem;
    line-height: 1.35;
    color: var(--color-text-dim);
}

.card .tags {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
    margin-top: auto;
}

.tag {
    font-size: .6rem;
    letter-spacing: .6px;
    text-transform: uppercase;
    padding: .35rem .5rem .3rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    color: var(--color-text-dim);
    font-weight: 500;
}

/* Footer */
.site-footer {
    padding: 3rem 0 3.5rem;
    border-top: 1px solid var(--color-border);
    background: #0b0d10;
}

body.theme-light .site-footer {
    background: #f5f7fa;
}

.footer-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.footer-col h4 {
    margin: 0 0 1rem;
    font-size: .8rem;
    letter-spacing: 1.3px;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--color-text-dim);
}

.footer-col ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: .5rem;
}

.footer-col a {
    text-decoration: none;
    color: var(--color-text-dim);
    font-size: .75rem;
    letter-spacing: .4px;
}

.footer-col a:hover {
    color: var(--color-text);
}

.copyright {
    margin-top: 2.5rem;
    font-size: .65rem;
    letter-spacing: .8px;
    text-transform: uppercase;
    color: var(--color-text-dim);
    text-align: center;
}

/* Utility */
.fx-fade-mask-top {
    -webkit-mask: linear-gradient(to bottom, transparent, black 80%);
    mask: linear-gradient(to bottom, transparent, black 80%);
}

.mono {
    font-family: var(--mono-stack);
    font-size: .75rem;
    letter-spacing: .4px;
}

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

.muted {
    opacity: .5;
}

.divider {
    height: 1px;
    background: var(--color-border);
    margin: 2.5rem 0;
}

/* Background canvas layering */
#network-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.layer-content {
    position: relative;
    z-index: 10;
}

/* Phoenix image wrapper modifications for hero */
.phoenix-wrapper {
    position: relative;
    /* increased size for a larger, more prominent hero */
    width: 620px;
    height: 620px;
    margin: 0 auto;
}

/* Backdrop disc for ember combo */
.phoenix-wrapper::after {
    /* Backdrop intentionally disabled: keep markup but hide the big circle glow */
    content: '';
    position: absolute;
    inset: 0;
    /* keep sizing for potential future tweaks */
    border-radius: 50%;
    background: transparent;
    /* remove glow */
    filter: none;
    z-index: 0;
    pointer-events: none;
}

/* Ember particles */
.phoenix-embers {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.phoenix-embers span {
    position: absolute;
    bottom: 12%;
    left: 50%;
    /* slightly larger embers to match bigger hero */
    width: 10px;
    height: 10px;
    margin-left: -5px;
    /* solid fallback color plus vivid radial gradient for modern browsers */
    background-color: rgb(255, 140, 0);
    background-image: radial-gradient(circle, rgba(255, 165, 0, 0.98) 0%, rgba(255, 140, 0, 0.78) 55%, rgba(255, 94, 0, 0.1) 75%, rgba(255, 69, 0, 0) 90%);
    border-radius: 50%;
    opacity: 0;
    animation: ember-rise 8s linear infinite;
    transform: translateX(0) scale(1);
    will-change: transform, opacity;
    mix-blend-mode: screen;
}

/* Individual timing + drift */
.phoenix-embers span:nth-child(1) {
    animation-delay: 0s;
    left: 54%;
    animation-duration: 7.2s;
}

.phoenix-embers span:nth-child(2) {
    animation-delay: 0.9s;
    left: 47%;
    animation-duration: 8.1s;
}

.phoenix-embers span:nth-child(3) {
    animation-delay: 1.8s;
    left: 52%;
    animation-duration: 7.5s;
}

.phoenix-embers span:nth-child(4) {
    animation-delay: 2.7s;
    left: 58%;
    animation-duration: 8.4s;
}

.phoenix-embers span:nth-child(5) {
    animation-delay: 3.6s;
    left: 44%;
    animation-duration: 7.8s;
}

.phoenix-embers span:nth-child(6) {
    animation-delay: 4.5s;
    left: 50%;
    animation-duration: 8.2s;
}

.phoenix-embers span:nth-child(7) {
    animation-delay: 5.1s;
    left: 56%;
    animation-duration: 7.4s;
}

.phoenix-embers span:nth-child(8) {
    animation-delay: 5.7s;
    left: 48%;
    animation-duration: 8.6s;
}

.phoenix-embers span:nth-child(9) {
    animation-delay: 6.3s;
    left: 53%;
    animation-duration: 7.1s;
}

.phoenix-embers span:nth-child(10) {
    animation-delay: 7.0s;
    left: 46%;
    animation-duration: 8.3s;
}

@keyframes ember-rise {
    0% {
        opacity: 0;
        transform: translate(-6px, 0) scale(0.55);
    }

    6% {
        opacity: 0.95;
    }

    55% {
        opacity: 0.8;
    }

    82% {
        opacity: 0.2;
    }

    100% {
        opacity: 0;
        /* travel a bit farther up to match the larger hero */
        transform: translate(22px, -320px) scale(0.28);
    }
}

/* Hide orbit rings (user requested removal of glowing white ring look) */
.phoenix-orbit {
    display: none;
}

/* If we ever want a single subtle ring, uncomment below
.phoenix-wrapper::before {
    content: '';
    position: absolute;
    inset: 8px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.08);
    background: radial-gradient(circle at 55% 40%, rgba(255,255,255,0.08), rgba(255,255,255,0) 60%);
    pointer-events: none;
}
*/

/* Phoenix image: remove blurry multi-glow + pulse animation; go for crisp subtle presence */
.phoenix-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('/phoenix2-transp.png') center/contain no-repeat;
    opacity: 0.85;
    animation: phoenix-breathe 16s ease-in-out infinite;
}

/* Reduced-motion preference: keep these at top-level */
@media (prefers-reduced-motion: reduce) {
    .phoenix-img {
        animation: none;
    }

    .phoenix-embers span {
        animation: none;
        opacity: 0.4;
    }
}

@keyframes phoenix-breathe {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.01);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Removed ethereal-pulse animation per design update */

/* Responsive tweaks (top-level media queries) */
@media (max-width: 860px) {
    .hero {
        padding-top: 4.5rem;
    }

    .nav-inner {
        padding: 0 1.25rem;
    }

    .container {
        padding: 0 1.25rem;
    }
}

@media (max-width: 600px) {
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-grid {
        gap: 2.5rem;
    }
}