:root {
    --ink-deep: #2C2C2A;
    --purple-deep: #26215C;
    --purple-dark: #3C3489;
    --purple-mid: #534AB7;
    --purple-soft: #7F77DD;
    --purple-pale: #AFA9EC;
    --ink-mid: #888780;
    --ink-ghost: #D3D1C7;
    --paper: #FAFAF8;
}

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

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--paper);
    font-family: 'DM Mono', monospace;
    color: var(--ink-deep);
}

#canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    display: block;
    background: transparent;
}

#ui-overlay {
    position: relative;
    z-index: 10;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 2rem;
    pointer-events: none;
}

header, footer {
    pointer-events: auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.logo {
    font-size: 2rem;
    letter-spacing: -0.05em;
}

.logo .bold { font-weight: 500; }
.logo .light { font-weight: 300; }

.tagline {
    font-size: 0.8rem;
    color: var(--ink-mid);
    margin-top: 0.2rem;
}

.version {
    font-size: 0.7rem;
    color: var(--ink-ghost);
    margin-top: 0.15rem;
}

footer {
    background: rgba(250, 250, 248, 0.8);
    backdrop-filter: blur(4px);
    padding: 1rem;
    border-radius: 4px;
    border: 1px solid rgba(0,0,0,0.05);
}

.api-key-container {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

#api-key-value {
    background: var(--purple-pale);
    padding: 0.2rem 0.5rem;
    font-size: 0.9rem;
    border-radius: 2px;
}

#copy-btn {
    background: var(--ink-deep);
    color: var(--paper);
    border: none;
    padding: 0.2rem 0.6rem;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8rem;
}

.secondary-btn {
    background: var(--paper);
    color: var(--ink-deep);
    border: 1px solid var(--ink-ghost);
    padding: 0.2rem 0.6rem;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8rem;
    transition: all 0.2s;
}

.secondary-btn:hover {
    background: var(--ink-ghost);
}

.secondary-btn.active {
    background: #ff4d4d;
    color: white;
    border-color: #ff4d4d;
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status {
    font-size: 0.8rem;
    color: var(--ink-mid);
}

#conn-status { color: var(--purple-soft); transition: color 0.4s; }
#conn-status.offline { color: #c0392b; }

.linux-cmd {
    font-size: 0.7rem;
    background: #f0f0f0;
    padding: 0.5rem;
    border-left: 3px solid var(--purple-mid);
    overflow-x: auto;
    white-space: nowrap;
}

.linux-cmd code { color: var(--purple-dark); }

#about-btn {
    flex-shrink: 0;
    width: 1.8rem;
    height: 1.8rem;
    border-radius: 50%;
    border: 1px solid var(--purple-pale);
    background: transparent;
    color: var(--purple-soft);
    font-family: inherit;
    font-size: 0.8rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
}

#about-btn:hover {
    background: var(--purple-pale);
    color: var(--purple-deep);
}

#about-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(44, 44, 42, 0.65);
    backdrop-filter: blur(3px);
    align-items: center;
    justify-content: center;
}

#about-modal.open {
    display: flex;
}

.about-card {
    background: var(--paper);
    border: 1px solid var(--purple-pale);
    border-left: 3px solid var(--purple-mid);
    padding: 2rem 2.5rem;
    max-width: 580px;
    width: 90%;
    position: relative;
    font-size: 0.82rem;
    line-height: 1.8;
    color: var(--ink-deep);
}

.about-card em {
    font-style: italic;
    color: var(--purple-dark);
}

#about-close {
    position: absolute;
    top: 0.6rem;
    right: 0.8rem;
    background: none;
    border: none;
    font-family: inherit;
    font-size: 1.1rem;
    color: var(--ink-mid);
    cursor: pointer;
    line-height: 1;
}

#about-close:hover {
    color: var(--ink-deep);
}