/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: max(var(--space-lg), env(safe-area-inset-top)) max(var(--space-3xl), env(safe-area-inset-right)) var(--space-lg) max(var(--space-3xl), env(safe-area-inset-left));
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav.scrolled {
    padding: var(--space-md) var(--space-3xl);
    background: rgba(5, 5, 8, 0.92);
    border-bottom: 1px solid rgba(0, 240, 255, 0.1);
}

/* backdrop-filter uniquement si GPU OK — très cher en software rendering */
@supports (backdrop-filter: blur(1px)) {
    .high-perf .nav.scrolled {
        background: rgba(5, 5, 8, 0.75);
        backdrop-filter: blur(16px);
    }
}

.low-perf .logo-dot {
    animation: none;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

button.nav-link {
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
}

button.mobile-link {
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 900;
    color: var(--neon-cyan);
    text-shadow: var(--glow-cyan);
    letter-spacing: 0.1em;
}

.logo-dot {
    width: 8px;
    height: 8px;
    background: var(--neon-pink);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.5; }
}

.nav-links {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: clamp(0.75rem, 1.2vw, var(--space-xl));
}

.nav-link {
    position: relative;
    display: flex;
    align-items: center;
    flex-shrink: 0;
    gap: var(--space-xs);
    font-family: var(--font-heading);
    font-size: clamp(0.65rem, 0.7vw + 0.4rem, 0.75rem);
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: var(--space-sm) 0;
    white-space: nowrap;
    transition: color var(--transition-normal);
}

.nav-link-text {
    white-space: nowrap;
}

.nav-link-number {
    font-size: 0.65rem;
    color: var(--neon-cyan);
    opacity: 0.5;
    transition: opacity var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

.nav-link:hover .nav-link-number,
.nav-link.active .nav-link-number {
    opacity: 1;
}

.nav-link-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-neon);
    transition: width var(--transition-normal);
}

.nav-link:hover .nav-link-line,
.nav-link.active .nav-link-line {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.sound-controls {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
}

.sound-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-normal), background var(--transition-normal);
    flex: none;
    position: relative;
    z-index: 2;
}

.sound-toggle:hover,
.sound-controls:focus-within .sound-toggle,
.sound-controls.is-volume-open .sound-toggle {
    border-color: var(--neon-cyan);
    background: rgba(0, 240, 255, 0.1);
}

.sound-volume {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    /* padding-top = pont de hover jusqu’au bouton (évite la fermeture) */
    padding: 0.85rem 0.85rem 0.7rem;
    margin: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.18s ease, visibility 0.18s;
    z-index: 30;
}

.sound-volume::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0.55rem;
    bottom: 0;
    background: rgba(8, 12, 18, 0.96);
    border: 1px solid rgba(0, 240, 255, 0.45);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.55), 0 0 18px rgba(0, 240, 255, 0.14);
    z-index: -1;
}

.sound-controls:hover .sound-volume,
.sound-controls:focus-within .sound-volume,
.sound-controls.is-volume-open .sound-volume {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.sound-volume-slider {
    --volume-percent: 50%;
    position: relative;
    z-index: 1;
    width: 7.5rem;
    height: 1.35rem;
    margin: 0;
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    cursor: pointer;
    outline: none;
}

/* Piste visible (zone de drag plus large que 4px) */
.sound-volume-slider::-webkit-slider-runnable-track {
    height: 5px;
    border-radius: 99px;
    background: linear-gradient(
        90deg,
        var(--neon-cyan) 0%,
        var(--neon-cyan) var(--volume-percent),
        rgba(255, 255, 255, 0.22) var(--volume-percent),
        rgba(255, 255, 255, 0.22) 100%
    );
}

.sound-volume-slider::-moz-range-track {
    height: 5px;
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.22);
}

.sound-volume-slider::-moz-range-progress {
    height: 5px;
    border-radius: 99px;
    background: var(--neon-cyan);
}

.sound-volume-slider::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    margin-top: -5.5px;
    border-radius: 50%;
    background: var(--neon-cyan);
    border: 2px solid #061018;
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.65);
    cursor: pointer;
}

.sound-volume-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--neon-cyan);
    border: 2px solid #061018;
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.65);
    cursor: pointer;
}

.sound-volume-slider:focus-visible {
    outline: 2px solid var(--neon-cyan);
    outline-offset: 4px;
}

html:not(.no-custom-cursor) .sound-volume,
html:not(.no-custom-cursor) .sound-volume-slider,
html:not(.no-custom-cursor) .sound-volume-slider::-webkit-slider-thumb {
    cursor: pointer;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-bg-dark);
    background: var(--neon-cyan);
    border: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.nav-cta:hover::before {
    left: 100%;
}

.nav-cta:hover {
    background: var(--neon-pink);
    transform: translateY(-2px);
    box-shadow: var(--glow-pink);
}

.cta-icon svg {
    width: 16px;
    height: 16px;
}

/* Menu toggle mobile */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: transparent;
    border: 1px solid var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    padding: 10px;
    z-index: 1001;
}

.menu-line {
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
}

.menu-toggle.active .menu-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active .menu-line:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .menu-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Menu mobile */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background: var(--color-bg-primary);
    z-index: 999;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-3xl);
    transition: right var(--transition-slow);
    border-left: 1px solid rgba(0, 240, 255, 0.1);
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-link {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.mobile-link:hover {
    color: var(--neon-cyan);
    transform: translateX(10px);
}

.mobile-link-number {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    color: var(--neon-cyan);
    opacity: 0.5;
}

.mobile-menu-footer {
    position: absolute;
    bottom: var(--space-3xl);
    left: var(--space-3xl);
    color: var(--text-muted);
    font-size: 0.85rem;
}