.logo {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    line-height: 0.8;
    position: relative;
    display: inline-block;
    user-select: none;
}

.logo-line-1 {
    display: block;
    letter-spacing: 0.1em;
}

.logo-line-2 {
    display: block;
    letter-spacing: 0.1em;
    margin-left: 0.2em;
    transition: margin-left 0.3s ease;
}

.logo-line-2.diva-mode {
    margin-left: -1.2em;
}

.logo-line-2.adey-mode {
    margin-left: -1.9em;
}

.interactive-letter {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55),
                color 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    position: relative;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
}



.logo .special-oo,
.logo .special-middle {
    position: relative;
}

[data-theme="dark"] .special-oo,
[data-theme="dark"] .special-middle {
    color: #ffffff;
}

[data-theme="dark"] .special-middle.diva-i {
    color: #000000;
}

.nav {
    position: fixed;
    top: 0;
    left: 0;
    padding: 1rem 1.5rem;
    z-index: 100;
}

.nav-logo {
    text-decoration: none;
    color: var(--text-primary, var(--text, #000000));
}

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

/* Mathematically correct face alignment using ch units:
   OO center = 2ch + 0.15em, mouth must match */
.nav .logo .logo-line-2 {
    margin-left: calc(-0.5ch - 0.05em);
}

.nav .logo .logo-line-2.diva-mode {
    margin-left: calc(-1.5ch - 0.15em);
}

.nav .logo .logo-line-2.adey-mode {
    margin-left: calc(-1.5ch - 0.05em);
}

.theme-toggle,
.gender-toggle,
.lang-toggle {
    position: fixed;
    top: 20px;
    z-index: 9998;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    padding: 0;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow:
        0 4px 15px rgba(0, 0, 0, 0.1),
        inset 0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.4);
    color: var(--text-primary, var(--text, #000000));
    cursor: pointer;
    font-size: 1rem;
    font-weight: bold;
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] .theme-toggle,
[data-theme="dark"] .gender-toggle,
[data-theme="dark"] .lang-toggle {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow:
        0 4px 15px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.theme-toggle:hover,
.gender-toggle:hover,
.lang-toggle:hover {
    transform: translateY(-2px) scale(1.05);
    background: rgba(255, 255, 255, 0.25);
    box-shadow:
        0 8px 20px rgba(0, 0, 0, 0.15),
        inset 0 0 0 1px rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .theme-toggle:hover,
[data-theme="dark"] .gender-toggle:hover,
[data-theme="dark"] .lang-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.theme-toggle {
    right: 20px;
}

.gender-toggle {
    right: 80px;
}

.lang-toggle {
    right: 140px;
}

@media (max-width: 768px) {
    .nav {
        padding: 1rem 1.5rem;
    }
}