:root {
    --text-primary: #f8f7f2;
    --text-secondary: rgba(248, 247, 242, 0.6);
    --ui-accent: #c5d8c1;

    --font-hero: 'Instrument Serif', serif;
    --font-ui: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --pad: clamp(1.25rem, 3vw, 3.5rem);
}

body.theme-light {
    --text-primary: #1a2419;
    --text-secondary: rgba(26, 36, 25, 0.6);
    --ui-accent: #5e7a54;
}

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

body, html {
    width: 100%;
    height: 100%;
    min-height: 100dvh;
    overflow: hidden;
    background-color: #0d150c;
    font-family: var(--font-ui);
    color: var(--text-primary);
    transition: color 1.5s cubic-bezier(0.4, 0, 0.2, 1);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    height: 100dvh;
    z-index: 0;
    pointer-events: none;
}

#ui-layer {
    position: relative;
    z-index: 10;
    width: 100%;
    height: 100%;
    height: 100dvh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto 1fr auto;
    padding: var(--pad);
    pointer-events: none;
}

.interact {
    pointer-events: auto;
}

header {
    grid-column: 1 / -1;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    mix-blend-mode: normal;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.logo img {
    height: 44px;
    width: auto;
    display: block;
    transition: filter 1.5s ease;
}

.logo-text {
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

body.theme-light .logo img {
    filter: invert(1);
}

.controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.x-link {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.x-link:hover {
    color: var(--text-primary);
}

#theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    color: var(--text-secondary);
}

#theme-toggle:hover {
    color: var(--text-primary);
}

#theme-toggle .icon-sun {
    display: none;
}

body.theme-light #theme-toggle .icon-moon {
    display: none;
}

body.theme-light #theme-toggle .icon-sun {
    display: block;
}

button {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    transition: color 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--ui-accent);
    color: #0d150c;
    padding: 0.6rem 1.4rem;
    border-radius: 999px;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.cta-button:hover {
    color: #0d150c;
    transform: scale(1.05);
    opacity: 0.9;
}

button:hover {
    color: var(--text-primary);
}

.definition-block {
    grid-column: 1 / -1;
    grid-row: 3;
    align-self: end;
    font-size: 0.7rem;
    line-height: 1.3;
}

.powered-by-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.partner-logos {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    flex-wrap: nowrap;
}

.partner-logos img {
    height: 15px;
    width: auto;
    display: block;
    object-fit: contain;
    opacity: 0.9;
    transition: filter 1.5s ease, opacity 0.3s ease;
}

.partner-logos img:hover {
    opacity: 1;
}

body.theme-light .partner-logos img {
    filter: invert(1);
}

.hero {
    grid-column: 1 / -1;
    grid-row: 2;
    align-self: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    pointer-events: none;
}

h1 {
    font-family: var(--font-hero);
    font-size: clamp(2rem, 8vw, 10rem);
    font-weight: 400;
    line-height: 0.85;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    color: var(--text-primary);
    transform: translateX(-2vw);
}

h1 span {
    display: block;
}

.hero-sub {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-secondary);
    transform: translateX(5vw);
}

.footer-info {
    grid-column: 2;
    grid-row: 3;
    align-self: end;
    justify-self: end;
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.theme-toggle-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.theme-indicator {
    width: 4px;
    height: 4px;
    background-color: var(--ui-accent);
    border-radius: 50%;
    transition: background-color 1.5s ease;
}

/* Tablet & below */
@media (max-width: 1024px) {
    h1 {
        transform: none;
    }

    .hero-sub {
        transform: none;
        margin-top: 1rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    #ui-layer {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr auto auto;
        row-gap: 1.5rem;
    }

    .controls {
        gap: 1rem;
    }

    .partner-logos {
        flex-wrap: wrap;
        gap: 1rem 1.5rem;
    }

    .footer-info {
        grid-column: 1;
        grid-row: 4;
        justify-self: start;
        text-align: left;
    }
}

/* Small phones */
@media (max-width: 480px) {
    .logo img {
        height: 36px;
    }

    .logo-text {
        font-size: 1rem;
    }

    .cta-button {
        padding: 0.55rem 1.1rem;
    }

    .controls {
        gap: 0.85rem;
    }

    h1 {
        line-height: 0.95;
    }

    .partner-logos img {
        height: 13px;
    }
}

/* Short / landscape screens */
@media (max-height: 520px) and (orientation: landscape) {
    #ui-layer {
        grid-template-rows: auto 1fr auto;
    }

    h1 {
        font-size: clamp(1.8rem, 10vh, 5rem);
        margin-bottom: 0.5rem;
    }

    .definition-block {
        font-size: 0.65rem;
    }

    .powered-by-label {
        margin-bottom: 0.5rem;
    }
}